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diff --git a/Documentation/media/uapi/cec/cec-api.rst b/Documentation/media/uapi/cec/cec-api.rst deleted file mode 100644 index 0780ba07995a..000000000000 --- a/Documentation/media/uapi/cec/cec-api.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. include:: <isonum.txt> - -.. _cec: - -######################################### -Part V - Consumer Electronics Control API -######################################### - -This part describes the CEC: Consumer Electronics Control - - -.. only:: html - - .. class:: toc-title - - Table of Contents - -.. toctree:: - :maxdepth: 5 - :numbered: - - cec-intro - cec-funcs - cec-pin-error-inj - cec-header - - -********************** -Revision and Copyright -********************** -Authors: - -- Verkuil, Hans <hverkuil-cisco@xs4all.nl> - - - Initial version. - -**Copyright** |copy| 2016 : Hans Verkuil - -**************** -Revision History -**************** - -:revision: 1.0.0 / 2016-03-17 (*hv*) - -Initial revision diff --git a/Documentation/media/uapi/cec/cec-func-close.rst b/Documentation/media/uapi/cec/cec-func-close.rst deleted file mode 100644 index e10d675546f8..000000000000 --- a/Documentation/media/uapi/cec/cec-func-close.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec-func-close: - -*********** -cec close() -*********** - -Name -==== - -cec-close - Close a cec device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: int close( int fd ) - :name: cec-close - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - - -Description -=========== - -Closes the cec device. Resources associated with the file descriptor are -freed. The device configuration remain unchanged. - - -Return Value -============ - -:c:func:`close() <cec-close>` returns 0 on success. On error, -1 is returned, and -``errno`` is set appropriately. Possible error codes are: - -``EBADF`` - ``fd`` is not a valid open file descriptor. diff --git a/Documentation/media/uapi/cec/cec-func-ioctl.rst b/Documentation/media/uapi/cec/cec-func-ioctl.rst deleted file mode 100644 index c18d4ba5eb37..000000000000 --- a/Documentation/media/uapi/cec/cec-func-ioctl.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec-func-ioctl: - -*********** -cec ioctl() -*********** - -Name -==== - -cec-ioctl - Control a cec device - -Synopsis -======== - -.. code-block:: c - - #include <sys/ioctl.h> - - -.. c:function:: int ioctl( int fd, int request, void *argp ) - :name: cec-ioctl - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``request`` - CEC ioctl request code as defined in the cec.h header file, for - example :ref:`CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`. - -``argp`` - Pointer to a request-specific structure. - - -Description -=========== - -The :c:func:`ioctl() <cec-ioctl>` function manipulates cec device parameters. The -argument ``fd`` must be an open file descriptor. - -The ioctl ``request`` code specifies the cec function to be called. It -has encoded in it whether the argument is an input, output or read/write -parameter, and the size of the argument ``argp`` in bytes. - -Macros and structures definitions specifying cec ioctl requests and -their parameters are located in the cec.h header file. All cec ioctl -requests, their respective function and parameters are specified in -:ref:`cec-user-func`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -Request-specific error codes are listed in the individual requests -descriptions. - -When an ioctl that takes an output or read/write parameter fails, the -parameter remains unmodified. diff --git a/Documentation/media/uapi/cec/cec-func-open.rst b/Documentation/media/uapi/cec/cec-func-open.rst deleted file mode 100644 index f235aa80155c..000000000000 --- a/Documentation/media/uapi/cec/cec-func-open.rst +++ /dev/null @@ -1,85 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec-func-open: - -********** -cec open() -********** - -Name -==== - -cec-open - Open a cec device - -Synopsis -======== - -.. code-block:: c - - #include <fcntl.h> - - -.. c:function:: int open( const char *device_name, int flags ) - :name: cec-open - - -Arguments -========= - -``device_name`` - Device to be opened. - -``flags`` - Open flags. Access mode must be ``O_RDWR``. - - When the ``O_NONBLOCK`` flag is given, the - :ref:`CEC_RECEIVE <CEC_RECEIVE>` and :ref:`CEC_DQEVENT <CEC_DQEVENT>` ioctls - will return the ``EAGAIN`` error code when no message or event is available, and - ioctls :ref:`CEC_TRANSMIT <CEC_TRANSMIT>`, - :ref:`CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` and - :ref:`CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` - all return 0. - - Other flags have no effect. - - -Description -=========== - -To open a cec device applications call :c:func:`open() <cec-open>` with the -desired device name. The function has no side effects; the device -configuration remain unchanged. - -When the device is opened in read-only mode, attempts to modify its -configuration will result in an error, and ``errno`` will be set to -EBADF. - - -Return Value -============ - -:c:func:`open() <cec-open>` returns the new file descriptor on success. On error, --1 is returned, and ``errno`` is set appropriately. Possible error codes -include: - -``EACCES`` - The requested access to the file is not allowed. - -``EMFILE`` - The process already has the maximum number of files open. - -``ENFILE`` - The system limit on the total number of open files has been reached. - -``ENOMEM`` - Insufficient kernel memory was available. - -``ENXIO`` - No device corresponding to this device special file exists. diff --git a/Documentation/media/uapi/cec/cec-func-poll.rst b/Documentation/media/uapi/cec/cec-func-poll.rst deleted file mode 100644 index 3f6c5b0effa3..000000000000 --- a/Documentation/media/uapi/cec/cec-func-poll.rst +++ /dev/null @@ -1,85 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec-func-poll: - -********** -cec poll() -********** - -Name -==== - -cec-poll - Wait for some event on a file descriptor - - -Synopsis -======== - -.. code-block:: c - - #include <sys/poll.h> - - -.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout ) - :name: cec-poll - -Arguments -========= - -``ufds`` - List of FD events to be watched - -``nfds`` - Number of FD events at the \*ufds array - -``timeout`` - Timeout to wait for events - - -Description -=========== - -With the :c:func:`poll() <cec-poll>` function applications can wait for CEC -events. - -On success :c:func:`poll() <cec-poll>` returns the number of file descriptors -that have been selected (that is, file descriptors for which the -``revents`` field of the respective struct :c:type:`pollfd` -is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in -the ``revents`` field if there are messages in the receive queue. If the -transmit queue has room for new messages, the ``POLLOUT`` and -``POLLWRNORM`` flags are set. If there are events in the event queue, -then the ``POLLPRI`` flag is set. When the function times out it returns -a value of zero, on failure it returns -1 and the ``errno`` variable is -set appropriately. - -For more details see the :c:func:`poll() <cec-poll>` manual page. - - -Return Value -============ - -On success, :c:func:`poll() <cec-poll>` returns the number structures which have -non-zero ``revents`` fields, or zero if the call timed out. On error -1 -is returned, and the ``errno`` variable is set appropriately: - -``EBADF`` - One or more of the ``ufds`` members specify an invalid file - descriptor. - -``EFAULT`` - ``ufds`` references an inaccessible memory area. - -``EINTR`` - The call was interrupted by a signal. - -``EINVAL`` - The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use - ``getrlimit()`` to obtain this value. diff --git a/Documentation/media/uapi/cec/cec-funcs.rst b/Documentation/media/uapi/cec/cec-funcs.rst deleted file mode 100644 index dc6da9c639a8..000000000000 --- a/Documentation/media/uapi/cec/cec-funcs.rst +++ /dev/null @@ -1,30 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec-user-func: - -****************** -Function Reference -****************** - - -.. toctree:: - :maxdepth: 1 - - cec-func-open - cec-func-close - cec-func-ioctl - cec-func-poll - cec-ioc-adap-g-caps - cec-ioc-adap-g-log-addrs - cec-ioc-adap-g-phys-addr - cec-ioc-adap-g-conn-info - cec-ioc-dqevent - cec-ioc-g-mode - cec-ioc-receive diff --git a/Documentation/media/uapi/cec/cec-header.rst b/Documentation/media/uapi/cec/cec-header.rst deleted file mode 100644 index 726f9766a130..000000000000 --- a/Documentation/media/uapi/cec/cec-header.rst +++ /dev/null @@ -1,17 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec_header: - -*************** -CEC Header File -*************** - -.. kernel-include:: $BUILDDIR/cec.h.rst - diff --git a/Documentation/media/uapi/cec/cec-intro.rst b/Documentation/media/uapi/cec/cec-intro.rst deleted file mode 100644 index 05088fcefe81..000000000000 --- a/Documentation/media/uapi/cec/cec-intro.rst +++ /dev/null @@ -1,49 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _cec-intro: - -Introduction -============ - -HDMI connectors provide a single pin for use by the Consumer Electronics -Control protocol. This protocol allows different devices connected by an -HDMI cable to communicate. The protocol for CEC version 1.4 is defined -in supplements 1 (CEC) and 2 (HEAC or HDMI Ethernet and Audio Return -Channel) of the HDMI 1.4a (:ref:`hdmi`) specification and the -extensions added to CEC version 2.0 are defined in chapter 11 of the -HDMI 2.0 (:ref:`hdmi2`) specification. - -The bitrate is very slow (effectively no more than 36 bytes per second) -and is based on the ancient AV.link protocol used in old SCART -connectors. The protocol closely resembles a crazy Rube Goldberg -contraption and is an unholy mix of low and high level messages. Some -messages, especially those part of the HEAC protocol layered on top of -CEC, need to be handled by the kernel, others can be handled either by -the kernel or by userspace. - -In addition, CEC can be implemented in HDMI receivers, transmitters and -in USB devices that have an HDMI input and an HDMI output and that -control just the CEC pin. - -Drivers that support CEC will create a CEC device node (/dev/cecX) to -give userspace access to the CEC adapter. The -:ref:`CEC_ADAP_G_CAPS` ioctl will tell userspace what it is allowed to do. - -In order to check the support and test it, it is suggested to download -the `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_ package. It -provides three tools to handle CEC: - -- cec-ctl: the Swiss army knife of CEC. Allows you to configure, transmit - and monitor CEC messages. - -- cec-compliance: does a CEC compliance test of a remote CEC device to - determine how compliant the CEC implementation is. - -- cec-follower: emulates a CEC follower. diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst deleted file mode 100644 index 76761a98c312..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst +++ /dev/null @@ -1,150 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CEC_ADAP_G_CAPS: - -********************* -ioctl CEC_ADAP_G_CAPS -********************* - -Name -==== - -CEC_ADAP_G_CAPS - Query device capabilities - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_ADAP_G_CAPS, struct cec_caps *argp ) - :name: CEC_ADAP_G_CAPS - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - - -Description -=========== - -All cec devices must support :ref:`ioctl CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`. To query -device information, applications call the ioctl with a pointer to a -struct :c:type:`cec_caps`. The driver fills the structure and -returns the information to the application. The ioctl never fails. - -.. tabularcolumns:: |p{1.2cm}|p{2.5cm}|p{13.8cm}| - -.. c:type:: cec_caps - -.. flat-table:: struct cec_caps - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 16 - - * - char - - ``driver[32]`` - - The name of the cec adapter driver. - * - char - - ``name[32]`` - - The name of this CEC adapter. The combination ``driver`` and - ``name`` must be unique. - * - __u32 - - ``capabilities`` - - The capabilities of the CEC adapter, see - :ref:`cec-capabilities`. - * - __u32 - - ``version`` - - CEC Framework API version, formatted with the ``KERNEL_VERSION()`` - macro. - - -.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}| - -.. _cec-capabilities: - -.. flat-table:: CEC Capabilities Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 8 - - * .. _`CEC-CAP-PHYS-ADDR`: - - - ``CEC_CAP_PHYS_ADDR`` - - 0x00000001 - - Userspace has to configure the physical address by calling - :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`. If - this capability isn't set, then setting the physical address is - handled by the kernel whenever the EDID is set (for an HDMI - receiver) or read (for an HDMI transmitter). - * .. _`CEC-CAP-LOG-ADDRS`: - - - ``CEC_CAP_LOG_ADDRS`` - - 0x00000002 - - Userspace has to configure the logical addresses by calling - :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`. If - this capability isn't set, then the kernel will have configured - this. - * .. _`CEC-CAP-TRANSMIT`: - - - ``CEC_CAP_TRANSMIT`` - - 0x00000004 - - Userspace can transmit CEC messages by calling - :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. This implies that - userspace can be a follower as well, since being able to transmit - messages is a prerequisite of becoming a follower. If this - capability isn't set, then the kernel will handle all CEC - transmits and process all CEC messages it receives. - * .. _`CEC-CAP-PASSTHROUGH`: - - - ``CEC_CAP_PASSTHROUGH`` - - 0x00000008 - - Userspace can use the passthrough mode by calling - :ref:`ioctl CEC_S_MODE <CEC_S_MODE>`. - * .. _`CEC-CAP-RC`: - - - ``CEC_CAP_RC`` - - 0x00000010 - - This adapter supports the remote control protocol. - * .. _`CEC-CAP-MONITOR-ALL`: - - - ``CEC_CAP_MONITOR_ALL`` - - 0x00000020 - - The CEC hardware can monitor all messages, not just directed and - broadcast messages. - * .. _`CEC-CAP-NEEDS-HPD`: - - - ``CEC_CAP_NEEDS_HPD`` - - 0x00000040 - - The CEC hardware is only active if the HDMI Hotplug Detect pin is - high. This makes it impossible to use CEC to wake up displays that - set the HPD pin low when in standby mode, but keep the CEC bus - alive. - * .. _`CEC-CAP-MONITOR-PIN`: - - - ``CEC_CAP_MONITOR_PIN`` - - 0x00000080 - - The CEC hardware can monitor CEC pin changes from low to high voltage - and vice versa. When in pin monitoring mode the application will - receive ``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events. - * .. _`CEC-CAP-CONNECTOR-INFO`: - - - ``CEC_CAP_CONNECTOR_INFO`` - - 0x00000100 - - If this capability is set, then :ref:`CEC_ADAP_G_CONNECTOR_INFO` can - be used. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst deleted file mode 100644 index 6818ddf1495c..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst +++ /dev/null @@ -1,105 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 -.. -.. Copyright 2019 Google LLC -.. -.. _CEC_ADAP_G_CONNECTOR_INFO: - -******************************* -ioctl CEC_ADAP_G_CONNECTOR_INFO -******************************* - -Name -==== - -CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp ) - :name: CEC_ADAP_G_CONNECTOR_INFO - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - - -Description -=========== - -Using this ioctl an application can learn which HDMI connector this CEC -device corresponds to. While calling this ioctl the application should -provide a pointer to a cec_connector_info struct which will be populated -by the kernel with the info provided by the adapter's driver. This ioctl -is only available if the ``CEC_CAP_CONNECTOR_INFO`` capability is set. - -.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}| - -.. c:type:: cec_connector_info - -.. flat-table:: struct cec_connector_info - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 8 - - * - __u32 - - ``type`` - - The type of connector this adapter is associated with. - * - union { - - ``(anonymous)`` - * - ``struct cec_drm_connector_info`` - - drm - - :ref:`cec-drm-connector-info` - * - } - - - - -.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}| - -.. _connector-type: - -.. flat-table:: Connector types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 8 - - * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`: - - - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR`` - - 0 - - No connector is associated with the adapter/the information is not - provided by the driver. - * .. _`CEC-CONNECTOR-TYPE-DRM`: - - - ``CEC_CONNECTOR_TYPE_DRM`` - - 1 - - Indicates that a DRM connector is associated with this adapter. - Information about the connector can be found in - :ref:`cec-drm-connector-info`. - -.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}| - -.. c:type:: cec_drm_connector_info - -.. _cec-drm-connector-info: - -.. flat-table:: struct cec_drm_connector_info - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 8 - - * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`: - - - __u32 - - ``card_no`` - - DRM card number: the number from a card's path, e.g. 0 in case of - /dev/card0. - * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`: - - - __u32 - - ``connector_id`` - - DRM connector ID. diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst deleted file mode 100644 index 26465094e3f1..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst +++ /dev/null @@ -1,378 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CEC_ADAP_LOG_ADDRS: -.. _CEC_ADAP_G_LOG_ADDRS: -.. _CEC_ADAP_S_LOG_ADDRS: - -**************************************************** -ioctls CEC_ADAP_G_LOG_ADDRS and CEC_ADAP_S_LOG_ADDRS -**************************************************** - -Name -==== - -CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS - Get or set the logical addresses - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_ADAP_G_LOG_ADDRS, struct cec_log_addrs *argp ) - :name: CEC_ADAP_G_LOG_ADDRS - -.. c:function:: int ioctl( int fd, CEC_ADAP_S_LOG_ADDRS, struct cec_log_addrs *argp ) - :name: CEC_ADAP_S_LOG_ADDRS - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - Pointer to struct :c:type:`cec_log_addrs`. - -Description -=========== - -To query the current CEC logical addresses, applications call -:ref:`ioctl CEC_ADAP_G_LOG_ADDRS <CEC_ADAP_G_LOG_ADDRS>` with a pointer to a -struct :c:type:`cec_log_addrs` where the driver stores the logical addresses. - -To set new logical addresses, applications fill in -struct :c:type:`cec_log_addrs` and call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` -with a pointer to this struct. The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` -is only available if ``CEC_CAP_LOG_ADDRS`` is set (the ``ENOTTY`` error code is -returned otherwise). The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` -can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not -the ``EBUSY`` error code will be returned. - -To clear existing logical addresses set ``num_log_addrs`` to 0. All other fields -will be ignored in that case. The adapter will go to the unconfigured state and the -``cec_version``, ``vendor_id`` and ``osd_name`` fields are all reset to their default -values (CEC version 2.0, no vendor ID and an empty OSD name). - -If the physical address is valid (see :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`), -then this ioctl will block until all requested logical -addresses have been claimed. If the file descriptor is in non-blocking mode then it will -not wait for the logical addresses to be claimed, instead it just returns 0. - -A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the -logical addresses are claimed or cleared. - -Attempting to call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` when -logical address types are already defined will return with error ``EBUSY``. - -.. c:type:: cec_log_addrs - -.. tabularcolumns:: |p{1.0cm}|p{8.0cm}|p{7.5cm}| - -.. cssclass:: longtable - -.. flat-table:: struct cec_log_addrs - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 16 - - * - __u8 - - ``log_addr[CEC_MAX_LOG_ADDRS]`` - - The actual logical addresses that were claimed. This is set by the - driver. If no logical address could be claimed, then it is set to - ``CEC_LOG_ADDR_INVALID``. If this adapter is Unregistered, then - ``log_addr[0]`` is set to 0xf and all others to - ``CEC_LOG_ADDR_INVALID``. - * - __u16 - - ``log_addr_mask`` - - The bitmask of all logical addresses this adapter has claimed. If - this adapter is Unregistered then ``log_addr_mask`` sets bit 15 - and clears all other bits. If this adapter is not configured at - all, then ``log_addr_mask`` is set to 0. Set by the driver. - * - __u8 - - ``cec_version`` - - The CEC version that this adapter shall use. See - :ref:`cec-versions`. Used to implement the - ``CEC_MSG_CEC_VERSION`` and ``CEC_MSG_REPORT_FEATURES`` messages. - Note that :ref:`CEC_OP_CEC_VERSION_1_3A <CEC-OP-CEC-VERSION-1-3A>` is not allowed by the CEC - framework. - * - __u8 - - ``num_log_addrs`` - - Number of logical addresses to set up. Must be ≤ - ``available_log_addrs`` as returned by - :ref:`CEC_ADAP_G_CAPS`. All arrays in - this structure are only filled up to index - ``available_log_addrs``-1. The remaining array elements will be - ignored. Note that the CEC 2.0 standard allows for a maximum of 2 - logical addresses, although some hardware has support for more. - ``CEC_MAX_LOG_ADDRS`` is 4. The driver will return the actual - number of logical addresses it could claim, which may be less than - what was requested. If this field is set to 0, then the CEC - adapter shall clear all claimed logical addresses and all other - fields will be ignored. - * - __u32 - - ``vendor_id`` - - The vendor ID is a 24-bit number that identifies the specific - vendor or entity. Based on this ID vendor specific commands may be - defined. If you do not want a vendor ID then set it to - ``CEC_VENDOR_ID_NONE``. - * - __u32 - - ``flags`` - - Flags. See :ref:`cec-log-addrs-flags` for a list of available flags. - * - char - - ``osd_name[15]`` - - The On-Screen Display name as is returned by the - ``CEC_MSG_SET_OSD_NAME`` message. - * - __u8 - - ``primary_device_type[CEC_MAX_LOG_ADDRS]`` - - Primary device type for each logical address. See - :ref:`cec-prim-dev-types` for possible types. - * - __u8 - - ``log_addr_type[CEC_MAX_LOG_ADDRS]`` - - Logical address types. See :ref:`cec-log-addr-types` for - possible types. The driver will update this with the actual - logical address type that it claimed (e.g. it may have to fallback - to :ref:`CEC_LOG_ADDR_TYPE_UNREGISTERED <CEC-LOG-ADDR-TYPE-UNREGISTERED>`). - * - __u8 - - ``all_device_types[CEC_MAX_LOG_ADDRS]`` - - CEC 2.0 specific: the bit mask of all device types. See - :ref:`cec-all-dev-types-flags`. It is used in the CEC 2.0 - ``CEC_MSG_REPORT_FEATURES`` message. For CEC 1.4 you can either leave - this field to 0, or fill it in according to the CEC 2.0 guidelines to - give the CEC framework more information about the device type, even - though the framework won't use it directly in the CEC message. - * - __u8 - - ``features[CEC_MAX_LOG_ADDRS][12]`` - - Features for each logical address. It is used in the CEC 2.0 - ``CEC_MSG_REPORT_FEATURES`` message. The 12 bytes include both the - RC Profile and the Device Features. For CEC 1.4 you can either leave - this field to all 0, or fill it in according to the CEC 2.0 guidelines to - give the CEC framework more information about the device type, even - though the framework won't use it directly in the CEC message. - - -.. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.7cm}| - -.. _cec-log-addrs-flags: - -.. flat-table:: Flags for struct cec_log_addrs - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`CEC-LOG-ADDRS-FL-ALLOW-UNREG-FALLBACK`: - - - ``CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK`` - - 1 - - By default if no logical address of the requested type can be claimed, then - it will go back to the unconfigured state. If this flag is set, then it will - fallback to the Unregistered logical address. Note that if the Unregistered - logical address was explicitly requested, then this flag has no effect. - * .. _`CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU`: - - - ``CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU`` - - 2 - - By default the ``CEC_MSG_USER_CONTROL_PRESSED`` and ``CEC_MSG_USER_CONTROL_RELEASED`` - messages are only passed on to the follower(s), if any. If this flag is set, - then these messages are also passed on to the remote control input subsystem - and will appear as keystrokes. This features needs to be enabled explicitly. - If CEC is used to enter e.g. passwords, then you may not want to enable this - to avoid trivial snooping of the keystrokes. - * .. _`CEC-LOG-ADDRS-FL-CDC-ONLY`: - - - ``CEC_LOG_ADDRS_FL_CDC_ONLY`` - - 4 - - If this flag is set, then the device is CDC-Only. CDC-Only CEC devices - are CEC devices that can only handle CDC messages. - - All other messages are ignored. - - -.. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.7cm}| - -.. _cec-versions: - -.. flat-table:: CEC Versions - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`CEC-OP-CEC-VERSION-1-3A`: - - - ``CEC_OP_CEC_VERSION_1_3A`` - - 4 - - CEC version according to the HDMI 1.3a standard. - * .. _`CEC-OP-CEC-VERSION-1-4B`: - - - ``CEC_OP_CEC_VERSION_1_4B`` - - 5 - - CEC version according to the HDMI 1.4b standard. - * .. _`CEC-OP-CEC-VERSION-2-0`: - - - ``CEC_OP_CEC_VERSION_2_0`` - - 6 - - CEC version according to the HDMI 2.0 standard. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _cec-prim-dev-types: - -.. flat-table:: CEC Primary Device Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`CEC-OP-PRIM-DEVTYPE-TV`: - - - ``CEC_OP_PRIM_DEVTYPE_TV`` - - 0 - - Use for a TV. - * .. _`CEC-OP-PRIM-DEVTYPE-RECORD`: - - - ``CEC_OP_PRIM_DEVTYPE_RECORD`` - - 1 - - Use for a recording device. - * .. _`CEC-OP-PRIM-DEVTYPE-TUNER`: - - - ``CEC_OP_PRIM_DEVTYPE_TUNER`` - - 3 - - Use for a device with a tuner. - * .. _`CEC-OP-PRIM-DEVTYPE-PLAYBACK`: - - - ``CEC_OP_PRIM_DEVTYPE_PLAYBACK`` - - 4 - - Use for a playback device. - * .. _`CEC-OP-PRIM-DEVTYPE-AUDIOSYSTEM`: - - - ``CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM`` - - 5 - - Use for an audio system (e.g. an audio/video receiver). - * .. _`CEC-OP-PRIM-DEVTYPE-SWITCH`: - - - ``CEC_OP_PRIM_DEVTYPE_SWITCH`` - - 6 - - Use for a CEC switch. - * .. _`CEC-OP-PRIM-DEVTYPE-VIDEOPROC`: - - - ``CEC_OP_PRIM_DEVTYPE_VIDEOPROC`` - - 7 - - Use for a video processor device. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _cec-log-addr-types: - -.. flat-table:: CEC Logical Address Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 16 - - * .. _`CEC-LOG-ADDR-TYPE-TV`: - - - ``CEC_LOG_ADDR_TYPE_TV`` - - 0 - - Use for a TV. - * .. _`CEC-LOG-ADDR-TYPE-RECORD`: - - - ``CEC_LOG_ADDR_TYPE_RECORD`` - - 1 - - Use for a recording device. - * .. _`CEC-LOG-ADDR-TYPE-TUNER`: - - - ``CEC_LOG_ADDR_TYPE_TUNER`` - - 2 - - Use for a tuner device. - * .. _`CEC-LOG-ADDR-TYPE-PLAYBACK`: - - - ``CEC_LOG_ADDR_TYPE_PLAYBACK`` - - 3 - - Use for a playback device. - * .. _`CEC-LOG-ADDR-TYPE-AUDIOSYSTEM`: - - - ``CEC_LOG_ADDR_TYPE_AUDIOSYSTEM`` - - 4 - - Use for an audio system device. - * .. _`CEC-LOG-ADDR-TYPE-SPECIFIC`: - - - ``CEC_LOG_ADDR_TYPE_SPECIFIC`` - - 5 - - Use for a second TV or for a video processor device. - * .. _`CEC-LOG-ADDR-TYPE-UNREGISTERED`: - - - ``CEC_LOG_ADDR_TYPE_UNREGISTERED`` - - 6 - - Use this if you just want to remain unregistered. Used for pure - CEC switches or CDC-only devices (CDC: Capability Discovery and - Control). - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _cec-all-dev-types-flags: - -.. flat-table:: CEC All Device Types Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`CEC-OP-ALL-DEVTYPE-TV`: - - - ``CEC_OP_ALL_DEVTYPE_TV`` - - 0x80 - - This supports the TV type. - * .. _`CEC-OP-ALL-DEVTYPE-RECORD`: - - - ``CEC_OP_ALL_DEVTYPE_RECORD`` - - 0x40 - - This supports the Recording type. - * .. _`CEC-OP-ALL-DEVTYPE-TUNER`: - - - ``CEC_OP_ALL_DEVTYPE_TUNER`` - - 0x20 - - This supports the Tuner type. - * .. _`CEC-OP-ALL-DEVTYPE-PLAYBACK`: - - - ``CEC_OP_ALL_DEVTYPE_PLAYBACK`` - - 0x10 - - This supports the Playback type. - * .. _`CEC-OP-ALL-DEVTYPE-AUDIOSYSTEM`: - - - ``CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM`` - - 0x08 - - This supports the Audio System type. - * .. _`CEC-OP-ALL-DEVTYPE-SWITCH`: - - - ``CEC_OP_ALL_DEVTYPE_SWITCH`` - - 0x04 - - This supports the CEC Switch or Video Processing type. - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` can return the following -error codes: - -ENOTTY - The ``CEC_CAP_LOG_ADDRS`` capability wasn't set, so this ioctl is not supported. - -EBUSY - The CEC adapter is currently configuring itself, or it is already configured and - ``num_log_addrs`` is non-zero, or another filehandle is in exclusive follower or - initiator mode, or the filehandle is in mode ``CEC_MODE_NO_INITIATOR``. - -EINVAL - The contents of struct :c:type:`cec_log_addrs` is invalid. diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst deleted file mode 100644 index 693be2f9bf2e..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst +++ /dev/null @@ -1,100 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CEC_ADAP_PHYS_ADDR: -.. _CEC_ADAP_G_PHYS_ADDR: -.. _CEC_ADAP_S_PHYS_ADDR: - -**************************************************** -ioctls CEC_ADAP_G_PHYS_ADDR and CEC_ADAP_S_PHYS_ADDR -**************************************************** - -Name -==== - -CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR - Get or set the physical address - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_ADAP_G_PHYS_ADDR, __u16 *argp ) - :name: CEC_ADAP_G_PHYS_ADDR - -.. c:function:: int ioctl( int fd, CEC_ADAP_S_PHYS_ADDR, __u16 *argp ) - :name: CEC_ADAP_S_PHYS_ADDR - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - Pointer to the CEC address. - -Description -=========== - -To query the current physical address applications call -:ref:`ioctl CEC_ADAP_G_PHYS_ADDR <CEC_ADAP_G_PHYS_ADDR>` with a pointer to a __u16 where the -driver stores the physical address. - -To set a new physical address applications store the physical address in -a __u16 and call :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` with a pointer to -this integer. The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` is only available if -``CEC_CAP_PHYS_ADDR`` is set (the ``ENOTTY`` error code will be returned -otherwise). The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can only be called -by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not -the ``EBUSY`` error code will be returned. - -To clear an existing physical address use ``CEC_PHYS_ADDR_INVALID``. -The adapter will go to the unconfigured state. - -If logical address types have been defined (see :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`), -then this ioctl will block until all -requested logical addresses have been claimed. If the file descriptor is in non-blocking mode -then it will not wait for the logical addresses to be claimed, instead it just returns 0. - -A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the physical address -changes. - -The physical address is a 16-bit number where each group of 4 bits -represent a digit of the physical address a.b.c.d where the most -significant 4 bits represent 'a'. The CEC root device (usually the TV) -has address 0.0.0.0. Every device that is hooked up to an input of the -TV has address a.0.0.0 (where 'a' is ≥ 1), devices hooked up to those in -turn have addresses a.b.0.0, etc. So a topology of up to 5 devices deep -is supported. The physical address a device shall use is stored in the -EDID of the sink. - -For example, the EDID for each HDMI input of the TV will have a -different physical address of the form a.0.0.0 that the sources will -read out and use as their physical address. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can return the following -error codes: - -ENOTTY - The ``CEC_CAP_PHYS_ADDR`` capability wasn't set, so this ioctl is not supported. - -EBUSY - Another filehandle is in exclusive follower or initiator mode, or the filehandle - is in mode ``CEC_MODE_NO_INITIATOR``. - -EINVAL - The physical address is malformed. diff --git a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst deleted file mode 100644 index d16b226b1bef..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst +++ /dev/null @@ -1,257 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CEC_DQEVENT: - -***************** -ioctl CEC_DQEVENT -***************** - -Name -==== - -CEC_DQEVENT - Dequeue a CEC event - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_DQEVENT, struct cec_event *argp ) - :name: CEC_DQEVENT - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - - -Description -=========== - -CEC devices can send asynchronous events. These can be retrieved by -calling :c:func:`CEC_DQEVENT`. If the file descriptor is in -non-blocking mode and no event is pending, then it will return -1 and -set errno to the ``EAGAIN`` error code. - -The internal event queues are per-filehandle and per-event type. If -there is no more room in a queue then the last event is overwritten with -the new one. This means that intermediate results can be thrown away but -that the latest event is always available. This also means that is it -possible to read two successive events that have the same value (e.g. -two :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` events with -the same state). In that case the intermediate state changes were lost but -it is guaranteed that the state did change in between the two events. - -.. tabularcolumns:: |p{1.2cm}|p{2.9cm}|p{13.4cm}| - -.. c:type:: cec_event_state_change - -.. flat-table:: struct cec_event_state_change - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 8 - - * - __u16 - - ``phys_addr`` - - The current physical address. This is ``CEC_PHYS_ADDR_INVALID`` if no - valid physical address is set. - * - __u16 - - ``log_addr_mask`` - - The current set of claimed logical addresses. This is 0 if no logical - addresses are claimed or if ``phys_addr`` is ``CEC_PHYS_ADDR_INVALID``. - If bit 15 is set (``1 << CEC_LOG_ADDR_UNREGISTERED``) then this device - has the unregistered logical address. In that case all other bits are 0. - * - __u16 - - ``have_conn_info`` - - If non-zero, then HDMI connector information is available. - This field is only valid if ``CEC_CAP_CONNECTOR_INFO`` is set. If that - capability is set and ``have_conn_info`` is zero, then that indicates - that the HDMI connector device is not instantiated, either because - the HDMI driver is still configuring the device or because the HDMI - device was unbound. - - -.. c:type:: cec_event_lost_msgs - -.. tabularcolumns:: |p{1.0cm}|p{2.0cm}|p{14.5cm}| - -.. flat-table:: struct cec_event_lost_msgs - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 16 - - * - __u32 - - ``lost_msgs`` - - Set to the number of lost messages since the filehandle was opened - or since the last time this event was dequeued for this - filehandle. The messages lost are the oldest messages. So when a - new message arrives and there is no more room, then the oldest - message is discarded to make room for the new one. The internal - size of the message queue guarantees that all messages received in - the last two seconds will be stored. Since messages should be - replied to within a second according to the CEC specification, - this is more than enough. - - -.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}| - -.. c:type:: cec_event - -.. flat-table:: struct cec_event - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 8 - - * - __u64 - - ``ts`` - - Timestamp of the event in ns. - - The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. - - To access the same clock from userspace use :c:func:`clock_gettime`. - * - __u32 - - ``event`` - - The CEC event type, see :ref:`cec-events`. - * - __u32 - - ``flags`` - - Event flags, see :ref:`cec-event-flags`. - * - union { - - (anonymous) - * - struct cec_event_state_change - - ``state_change`` - - The new adapter state as sent by the :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` - event. - * - struct cec_event_lost_msgs - - ``lost_msgs`` - - The number of lost messages as sent by the :ref:`CEC_EVENT_LOST_MSGS <CEC-EVENT-LOST-MSGS>` - event. - * - } - - - - -.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}| - -.. _cec-events: - -.. flat-table:: CEC Events Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 16 - - * .. _`CEC-EVENT-STATE-CHANGE`: - - - ``CEC_EVENT_STATE_CHANGE`` - - 1 - - Generated when the CEC Adapter's state changes. When open() is - called an initial event will be generated for that filehandle with - the CEC Adapter's state at that time. - * .. _`CEC-EVENT-LOST-MSGS`: - - - ``CEC_EVENT_LOST_MSGS`` - - 2 - - Generated if one or more CEC messages were lost because the - application didn't dequeue CEC messages fast enough. - * .. _`CEC-EVENT-PIN-CEC-LOW`: - - - ``CEC_EVENT_PIN_CEC_LOW`` - - 3 - - Generated if the CEC pin goes from a high voltage to a low voltage. - Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN`` - capability set. - * .. _`CEC-EVENT-PIN-CEC-HIGH`: - - - ``CEC_EVENT_PIN_CEC_HIGH`` - - 4 - - Generated if the CEC pin goes from a low voltage to a high voltage. - Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN`` - capability set. - * .. _`CEC-EVENT-PIN-HPD-LOW`: - - - ``CEC_EVENT_PIN_HPD_LOW`` - - 5 - - Generated if the HPD pin goes from a high voltage to a low voltage. - Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN`` - capability set. When open() is called, the HPD pin can be read and - if the HPD is low, then an initial event will be generated for that - filehandle. - * .. _`CEC-EVENT-PIN-HPD-HIGH`: - - - ``CEC_EVENT_PIN_HPD_HIGH`` - - 6 - - Generated if the HPD pin goes from a low voltage to a high voltage. - Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN`` - capability set. When open() is called, the HPD pin can be read and - if the HPD is high, then an initial event will be generated for that - filehandle. - * .. _`CEC-EVENT-PIN-5V-LOW`: - - - ``CEC_EVENT_PIN_5V_LOW`` - - 6 - - Generated if the 5V pin goes from a high voltage to a low voltage. - Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN`` - capability set. When open() is called, the 5V pin can be read and - if the 5V is low, then an initial event will be generated for that - filehandle. - * .. _`CEC-EVENT-PIN-5V-HIGH`: - - - ``CEC_EVENT_PIN_5V_HIGH`` - - 7 - - Generated if the 5V pin goes from a low voltage to a high voltage. - Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN`` - capability set. When open() is called, the 5V pin can be read and - if the 5V is high, then an initial event will be generated for that - filehandle. - - -.. tabularcolumns:: |p{6.0cm}|p{0.6cm}|p{10.9cm}| - -.. _cec-event-flags: - -.. flat-table:: CEC Event Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 8 - - * .. _`CEC-EVENT-FL-INITIAL-STATE`: - - - ``CEC_EVENT_FL_INITIAL_STATE`` - - 1 - - Set for the initial events that are generated when the device is - opened. See the table above for which events do this. This allows - applications to learn the initial state of the CEC adapter at - open() time. - * .. _`CEC-EVENT-FL-DROPPED-EVENTS`: - - - ``CEC_EVENT_FL_DROPPED_EVENTS`` - - 2 - - Set if one or more events of the given event type have been dropped. - This is an indication that the application cannot keep up. - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -The :ref:`ioctl CEC_DQEVENT <CEC_DQEVENT>` can return the following -error codes: - -EAGAIN - This is returned when the filehandle is in non-blocking mode and there - are no pending events. - -ERESTARTSYS - An interrupt (e.g. Ctrl-C) arrived while in blocking mode waiting for - events to arrive. diff --git a/Documentation/media/uapi/cec/cec-ioc-g-mode.rst b/Documentation/media/uapi/cec/cec-ioc-g-mode.rst deleted file mode 100644 index 2535b77e3459..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-g-mode.rst +++ /dev/null @@ -1,301 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CEC_MODE: -.. _CEC_G_MODE: -.. _CEC_S_MODE: - -******************************** -ioctls CEC_G_MODE and CEC_S_MODE -******************************** - -CEC_G_MODE, CEC_S_MODE - Get or set exclusive use of the CEC adapter - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_G_MODE, __u32 *argp ) - :name: CEC_G_MODE - -.. c:function:: int ioctl( int fd, CEC_S_MODE, __u32 *argp ) - :name: CEC_S_MODE - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - Pointer to CEC mode. - -Description -=========== - -By default any filehandle can use :ref:`CEC_TRANSMIT`, but in order to prevent -applications from stepping on each others toes it must be possible to -obtain exclusive access to the CEC adapter. This ioctl sets the -filehandle to initiator and/or follower mode which can be exclusive -depending on the chosen mode. The initiator is the filehandle that is -used to initiate messages, i.e. it commands other CEC devices. The -follower is the filehandle that receives messages sent to the CEC -adapter and processes them. The same filehandle can be both initiator -and follower, or this role can be taken by two different filehandles. - -When a CEC message is received, then the CEC framework will decide how -it will be processed. If the message is a reply to an earlier -transmitted message, then the reply is sent back to the filehandle that -is waiting for it. In addition the CEC framework will process it. - -If the message is not a reply, then the CEC framework will process it -first. If there is no follower, then the message is just discarded and a -feature abort is sent back to the initiator if the framework couldn't -process it. If there is a follower, then the message is passed on to the -follower who will use :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` to dequeue -the new message. The framework expects the follower to make the right -decisions. - -The CEC framework will process core messages unless requested otherwise -by the follower. The follower can enable the passthrough mode. In that -case, the CEC framework will pass on most core messages without -processing them and the follower will have to implement those messages. -There are some messages that the core will always process, regardless of -the passthrough mode. See :ref:`cec-core-processing` for details. - -If there is no initiator, then any CEC filehandle can use -:ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If there is an exclusive -initiator then only that initiator can call -:ref:`CEC_TRANSMIT`. The follower can of course -always call :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. - -Available initiator modes are: - -.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}| - -.. _cec-mode-initiator_e: - -.. flat-table:: Initiator Modes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 16 - - * .. _`CEC-MODE-NO-INITIATOR`: - - - ``CEC_MODE_NO_INITIATOR`` - - 0x0 - - This is not an initiator, i.e. it cannot transmit CEC messages or - make any other changes to the CEC adapter. - * .. _`CEC-MODE-INITIATOR`: - - - ``CEC_MODE_INITIATOR`` - - 0x1 - - This is an initiator (the default when the device is opened) and - it can transmit CEC messages and make changes to the CEC adapter, - unless there is an exclusive initiator. - * .. _`CEC-MODE-EXCL-INITIATOR`: - - - ``CEC_MODE_EXCL_INITIATOR`` - - 0x2 - - This is an exclusive initiator and this file descriptor is the - only one that can transmit CEC messages and make changes to the - CEC adapter. If someone else is already the exclusive initiator - then an attempt to become one will return the ``EBUSY`` error code - error. - - -Available follower modes are: - -.. tabularcolumns:: |p{6.6cm}|p{0.9cm}|p{10.0cm}| - -.. _cec-mode-follower_e: - -.. cssclass:: longtable - -.. flat-table:: Follower Modes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 16 - - * .. _`CEC-MODE-NO-FOLLOWER`: - - - ``CEC_MODE_NO_FOLLOWER`` - - 0x00 - - This is not a follower (the default when the device is opened). - * .. _`CEC-MODE-FOLLOWER`: - - - ``CEC_MODE_FOLLOWER`` - - 0x10 - - This is a follower and it will receive CEC messages unless there - is an exclusive follower. You cannot become a follower if - :ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>` - was specified, the ``EINVAL`` error code is returned in that case. - * .. _`CEC-MODE-EXCL-FOLLOWER`: - - - ``CEC_MODE_EXCL_FOLLOWER`` - - 0x20 - - This is an exclusive follower and only this file descriptor will - receive CEC messages for processing. If someone else is already - the exclusive follower then an attempt to become one will return - the ``EBUSY`` error code. You cannot become a follower if - :ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>` - was specified, the ``EINVAL`` error code is returned in that case. - * .. _`CEC-MODE-EXCL-FOLLOWER-PASSTHRU`: - - - ``CEC_MODE_EXCL_FOLLOWER_PASSTHRU`` - - 0x30 - - This is an exclusive follower and only this file descriptor will - receive CEC messages for processing. In addition it will put the - CEC device into passthrough mode, allowing the exclusive follower - to handle most core messages instead of relying on the CEC - framework for that. If someone else is already the exclusive - follower then an attempt to become one will return the ``EBUSY`` error - code. You cannot become a follower if :ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` - is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>` was specified, - the ``EINVAL`` error code is returned in that case. - * .. _`CEC-MODE-MONITOR-PIN`: - - - ``CEC_MODE_MONITOR_PIN`` - - 0xd0 - - Put the file descriptor into pin monitoring mode. Can only be used in - combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`, - otherwise the ``EINVAL`` error code will be returned. - This mode requires that the :ref:`CEC_CAP_MONITOR_PIN <CEC-CAP-MONITOR-PIN>` - capability is set, otherwise the ``EINVAL`` error code is returned. - While in pin monitoring mode this file descriptor can receive the - ``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events to see the - low-level CEC pin transitions. This is very useful for debugging. - This mode is only allowed if the process has the ``CAP_NET_ADMIN`` - capability. If that is not set, then the ``EPERM`` error code is returned. - * .. _`CEC-MODE-MONITOR`: - - - ``CEC_MODE_MONITOR`` - - 0xe0 - - Put the file descriptor into monitor mode. Can only be used in - combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`, - otherwise the ``EINVAL`` error code will be returned. - In monitor mode all messages this CEC - device transmits and all messages it receives (both broadcast - messages and directed messages for one its logical addresses) will - be reported. This is very useful for debugging. This is only - allowed if the process has the ``CAP_NET_ADMIN`` capability. If - that is not set, then the ``EPERM`` error code is returned. - * .. _`CEC-MODE-MONITOR-ALL`: - - - ``CEC_MODE_MONITOR_ALL`` - - 0xf0 - - Put the file descriptor into 'monitor all' mode. Can only be used - in combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`, otherwise - the ``EINVAL`` error code will be returned. In 'monitor all' mode all messages - this CEC device transmits and all messages it receives, including - directed messages for other CEC devices will be reported. This is - very useful for debugging, but not all devices support this. This - mode requires that the :ref:`CEC_CAP_MONITOR_ALL <CEC-CAP-MONITOR-ALL>` capability is set, - otherwise the ``EINVAL`` error code is returned. This is only allowed if - the process has the ``CAP_NET_ADMIN`` capability. If that is not - set, then the ``EPERM`` error code is returned. - - -Core message processing details: - -.. tabularcolumns:: |p{6.6cm}|p{10.9cm}| - -.. _cec-core-processing: - -.. flat-table:: Core Message Processing - :header-rows: 0 - :stub-columns: 0 - :widths: 1 8 - - * .. _`CEC-MSG-GET-CEC-VERSION`: - - - ``CEC_MSG_GET_CEC_VERSION`` - - The core will return the CEC version that was set with - :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`, - except when in passthrough mode. In passthrough mode the core - does nothing and this message has to be handled by a follower - instead. - * .. _`CEC-MSG-GIVE-DEVICE-VENDOR-ID`: - - - ``CEC_MSG_GIVE_DEVICE_VENDOR_ID`` - - The core will return the vendor ID that was set with - :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`, - except when in passthrough mode. In passthrough mode the core - does nothing and this message has to be handled by a follower - instead. - * .. _`CEC-MSG-ABORT`: - - - ``CEC_MSG_ABORT`` - - The core will return a Feature Abort message with reason - 'Feature Refused' as per the specification, except when in - passthrough mode. In passthrough mode the core does nothing - and this message has to be handled by a follower instead. - * .. _`CEC-MSG-GIVE-PHYSICAL-ADDR`: - - - ``CEC_MSG_GIVE_PHYSICAL_ADDR`` - - The core will report the current physical address, except when - in passthrough mode. In passthrough mode the core does nothing - and this message has to be handled by a follower instead. - * .. _`CEC-MSG-GIVE-OSD-NAME`: - - - ``CEC_MSG_GIVE_OSD_NAME`` - - The core will report the current OSD name that was set with - :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`, - except when in passthrough mode. In passthrough mode the core - does nothing and this message has to be handled by a follower - instead. - * .. _`CEC-MSG-GIVE-FEATURES`: - - - ``CEC_MSG_GIVE_FEATURES`` - - The core will do nothing if the CEC version is older than 2.0, - otherwise it will report the current features that were set with - :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`, - except when in passthrough mode. In passthrough mode the core - does nothing (for any CEC version) and this message has to be handled - by a follower instead. - * .. _`CEC-MSG-USER-CONTROL-PRESSED`: - - - ``CEC_MSG_USER_CONTROL_PRESSED`` - - If :ref:`CEC_CAP_RC <CEC-CAP-RC>` is set and if - :ref:`CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU <CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU>` - is set, then generate a remote control key - press. This message is always passed on to the follower(s). - * .. _`CEC-MSG-USER-CONTROL-RELEASED`: - - - ``CEC_MSG_USER_CONTROL_RELEASED`` - - If :ref:`CEC_CAP_RC <CEC-CAP-RC>` is set and if - :ref:`CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU <CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU>` - is set, then generate a remote control key - release. This message is always passed on to the follower(s). - * .. _`CEC-MSG-REPORT-PHYSICAL-ADDR`: - - - ``CEC_MSG_REPORT_PHYSICAL_ADDR`` - - The CEC framework will make note of the reported physical address - and then just pass the message on to the follower(s). - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -The :ref:`ioctl CEC_S_MODE <CEC_S_MODE>` can return the following -error codes: - -EINVAL - The requested mode is invalid. - -EPERM - Monitor mode is requested, but the process does have the ``CAP_NET_ADMIN`` - capability. - -EBUSY - Someone else is already an exclusive follower or initiator. diff --git a/Documentation/media/uapi/cec/cec-ioc-receive.rst b/Documentation/media/uapi/cec/cec-ioc-receive.rst deleted file mode 100644 index 4137903d672e..000000000000 --- a/Documentation/media/uapi/cec/cec-ioc-receive.rst +++ /dev/null @@ -1,391 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CEC_TRANSMIT: -.. _CEC_RECEIVE: - -*********************************** -ioctls CEC_RECEIVE and CEC_TRANSMIT -*********************************** - -Name -==== - -CEC_RECEIVE, CEC_TRANSMIT - Receive or transmit a CEC message - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, CEC_RECEIVE, struct cec_msg \*argp ) - :name: CEC_RECEIVE - -.. c:function:: int ioctl( int fd, CEC_TRANSMIT, struct cec_msg \*argp ) - :name: CEC_TRANSMIT - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <cec-open>`. - -``argp`` - Pointer to struct cec_msg. - -Description -=========== - -To receive a CEC message the application has to fill in the -``timeout`` field of struct :c:type:`cec_msg` and pass it to -:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. -If the file descriptor is in non-blocking mode and there are no received -messages pending, then it will return -1 and set errno to the ``EAGAIN`` -error code. If the file descriptor is in blocking mode and ``timeout`` -is non-zero and no message arrived within ``timeout`` milliseconds, then -it will return -1 and set errno to the ``ETIMEDOUT`` error code. - -A received message can be: - -1. a message received from another CEC device (the ``sequence`` field will - be 0). -2. the result of an earlier non-blocking transmit (the ``sequence`` field will - be non-zero). - -To send a CEC message the application has to fill in the struct -:c:type:`cec_msg` and pass it to :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. -The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is only available if -``CEC_CAP_TRANSMIT`` is set. If there is no more room in the transmit -queue, then it will return -1 and set errno to the ``EBUSY`` error code. -The transmit queue has enough room for 18 messages (about 1 second worth -of 2-byte messages). Note that the CEC kernel framework will also reply -to core messages (see :ref:`cec-core-processing`), so it is not a good -idea to fully fill up the transmit queue. - -If the file descriptor is in non-blocking mode then the transmit will -return 0 and the result of the transmit will be available via -:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` once the transmit has finished -(including waiting for a reply, if requested). - -The ``sequence`` field is filled in for every transmit and this can be -checked against the received messages to find the corresponding transmit -result. - -Normally calling :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` when the physical -address is invalid (due to e.g. a disconnect) will return ``ENONET``. - -However, the CEC specification allows sending messages from 'Unregistered' to -'TV' when the physical address is invalid since some TVs pull the hotplug detect -pin of the HDMI connector low when they go into standby, or when switching to -another input. - -When the hotplug detect pin goes low the EDID disappears, and thus the -physical address, but the cable is still connected and CEC still works. -In order to detect/wake up the device it is allowed to send poll and 'Image/Text -View On' messages from initiator 0xf ('Unregistered') to destination 0 ('TV'). - -.. tabularcolumns:: |p{1.0cm}|p{3.5cm}|p{13.0cm}| - -.. c:type:: cec_msg - -.. cssclass:: longtable - -.. flat-table:: struct cec_msg - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 16 - - * - __u64 - - ``tx_ts`` - - Timestamp in ns of when the last byte of the message was transmitted. - The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. To access - the same clock from userspace use :c:func:`clock_gettime`. - * - __u64 - - ``rx_ts`` - - Timestamp in ns of when the last byte of the message was received. - The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. To access - the same clock from userspace use :c:func:`clock_gettime`. - * - __u32 - - ``len`` - - The length of the message. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` this is filled in - by the application. The driver will fill this in for - :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` it will be - filled in by the driver with the length of the reply message if ``reply`` was set. - * - __u32 - - ``timeout`` - - The timeout in milliseconds. This is the time the device will wait - for a message to be received before timing out. If it is set to 0, - then it will wait indefinitely when it is called by :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. - If it is 0 and it is called by :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`, - then it will be replaced by 1000 if the ``reply`` is non-zero or - ignored if ``reply`` is 0. - * - __u32 - - ``sequence`` - - A non-zero sequence number is automatically assigned by the CEC framework - for all transmitted messages. It is used by the CEC framework when it queues - the transmit result (when transmit was called in non-blocking mode). This - allows the application to associate the received message with the original - transmit. - * - __u32 - - ``flags`` - - Flags. See :ref:`cec-msg-flags` for a list of available flags. - * - __u8 - - ``tx_status`` - - The status bits of the transmitted message. See - :ref:`cec-tx-status` for the possible status values. It is 0 if - this message was received, not transmitted. - * - __u8 - - ``msg[16]`` - - The message payload. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` this is filled in by the - application. The driver will fill this in for :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. - For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` it will be filled in by the driver with - the payload of the reply message if ``timeout`` was set. - * - __u8 - - ``reply`` - - Wait until this message is replied. If ``reply`` is 0 and the - ``timeout`` is 0, then don't wait for a reply but return after - transmitting the message. Ignored by :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. - The case where ``reply`` is 0 (this is the opcode for the Feature Abort - message) and ``timeout`` is non-zero is specifically allowed to make it - possible to send a message and wait up to ``timeout`` milliseconds for a - Feature Abort reply. In this case ``rx_status`` will either be set - to :ref:`CEC_RX_STATUS_TIMEOUT <CEC-RX-STATUS-TIMEOUT>` or - :ref:`CEC_RX_STATUS_FEATURE_ABORT <CEC-RX-STATUS-FEATURE-ABORT>`. - - If the transmitter message is ``CEC_MSG_INITIATE_ARC`` then the ``reply`` - values ``CEC_MSG_REPORT_ARC_INITIATED`` and ``CEC_MSG_REPORT_ARC_TERMINATED`` - are processed differently: either value will match both possible replies. - The reason is that the ``CEC_MSG_INITIATE_ARC`` message is the only CEC - message that has two possible replies other than Feature Abort. The - ``reply`` field will be updated with the actual reply so that it is - synchronized with the contents of the received message. - * - __u8 - - ``rx_status`` - - The status bits of the received message. See - :ref:`cec-rx-status` for the possible status values. It is 0 if - this message was transmitted, not received, unless this is the - reply to a transmitted message. In that case both ``rx_status`` - and ``tx_status`` are set. - * - __u8 - - ``tx_status`` - - The status bits of the transmitted message. See - :ref:`cec-tx-status` for the possible status values. It is 0 if - this message was received, not transmitted. - * - __u8 - - ``tx_arb_lost_cnt`` - - A counter of the number of transmit attempts that resulted in the - Arbitration Lost error. This is only set if the hardware supports - this, otherwise it is always 0. This counter is only valid if the - :ref:`CEC_TX_STATUS_ARB_LOST <CEC-TX-STATUS-ARB-LOST>` status bit is set. - * - __u8 - - ``tx_nack_cnt`` - - A counter of the number of transmit attempts that resulted in the - Not Acknowledged error. This is only set if the hardware supports - this, otherwise it is always 0. This counter is only valid if the - :ref:`CEC_TX_STATUS_NACK <CEC-TX-STATUS-NACK>` status bit is set. - * - __u8 - - ``tx_low_drive_cnt`` - - A counter of the number of transmit attempts that resulted in the - Arbitration Lost error. This is only set if the hardware supports - this, otherwise it is always 0. This counter is only valid if the - :ref:`CEC_TX_STATUS_LOW_DRIVE <CEC-TX-STATUS-LOW-DRIVE>` status bit is set. - * - __u8 - - ``tx_error_cnt`` - - A counter of the number of transmit errors other than Arbitration - Lost or Not Acknowledged. This is only set if the hardware - supports this, otherwise it is always 0. This counter is only - valid if the :ref:`CEC_TX_STATUS_ERROR <CEC-TX-STATUS-ERROR>` status bit is set. - - -.. tabularcolumns:: |p{6.2cm}|p{1.0cm}|p{10.3cm}| - -.. _cec-msg-flags: - -.. flat-table:: Flags for struct cec_msg - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`CEC-MSG-FL-REPLY-TO-FOLLOWERS`: - - - ``CEC_MSG_FL_REPLY_TO_FOLLOWERS`` - - 1 - - If a CEC transmit expects a reply, then by default that reply is only sent to - the filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If this - flag is set, then the reply is also sent to all followers, if any. If the - filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is also a - follower, then that filehandle will receive the reply twice: once as the - result of the :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`, and once via - :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. - - * .. _`CEC-MSG-FL-RAW`: - - - ``CEC_MSG_FL_RAW`` - - 2 - - Normally CEC messages are validated before transmitting them. If this - flag is set when :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is called, - then no validation takes place and the message is transmitted as-is. - This is useful when debugging CEC issues. - This flag is only allowed if the process has the ``CAP_SYS_RAWIO`` - capability. If that is not set, then the ``EPERM`` error code is - returned. - - -.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}| - -.. _cec-tx-status: - -.. flat-table:: CEC Transmit Status - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 16 - - * .. _`CEC-TX-STATUS-OK`: - - - ``CEC_TX_STATUS_OK`` - - 0x01 - - The message was transmitted successfully. This is mutually - exclusive with :ref:`CEC_TX_STATUS_MAX_RETRIES <CEC-TX-STATUS-MAX-RETRIES>`. - Other bits can still be set if earlier attempts met with failure before - the transmit was eventually successful. - * .. _`CEC-TX-STATUS-ARB-LOST`: - - - ``CEC_TX_STATUS_ARB_LOST`` - - 0x02 - - CEC line arbitration was lost, i.e. another transmit started at the - same time with a higher priority. Optional status, not all hardware - can detect this error condition. - * .. _`CEC-TX-STATUS-NACK`: - - - ``CEC_TX_STATUS_NACK`` - - 0x04 - - Message was not acknowledged. Note that some hardware cannot tell apart - a 'Not Acknowledged' status from other error conditions, i.e. the result - of a transmit is just OK or FAIL. In that case this status will be - returned when the transmit failed. - * .. _`CEC-TX-STATUS-LOW-DRIVE`: - - - ``CEC_TX_STATUS_LOW_DRIVE`` - - 0x08 - - Low drive was detected on the CEC bus. This indicates that a - follower detected an error on the bus and requests a - retransmission. Optional status, not all hardware can detect this - error condition. - * .. _`CEC-TX-STATUS-ERROR`: - - - ``CEC_TX_STATUS_ERROR`` - - 0x10 - - Some error occurred. This is used for any errors that do not fit - ``CEC_TX_STATUS_ARB_LOST`` or ``CEC_TX_STATUS_LOW_DRIVE``, either because - the hardware could not tell which error occurred, or because the hardware - tested for other conditions besides those two. Optional status. - * .. _`CEC-TX-STATUS-MAX-RETRIES`: - - - ``CEC_TX_STATUS_MAX_RETRIES`` - - 0x20 - - The transmit failed after one or more retries. This status bit is - mutually exclusive with :ref:`CEC_TX_STATUS_OK <CEC-TX-STATUS-OK>`. - Other bits can still be set to explain which failures were seen. - * .. _`CEC-TX-STATUS-ABORTED`: - - - ``CEC_TX_STATUS_ABORTED`` - - 0x40 - - The transmit was aborted due to an HDMI disconnect, or the adapter - was unconfigured, or a transmit was interrupted, or the driver - returned an error when attempting to start a transmit. - * .. _`CEC-TX-STATUS-TIMEOUT`: - - - ``CEC_TX_STATUS_TIMEOUT`` - - 0x80 - - The transmit timed out. This should not normally happen and this - indicates a driver problem. - - -.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}| - -.. _cec-rx-status: - -.. flat-table:: CEC Receive Status - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 16 - - * .. _`CEC-RX-STATUS-OK`: - - - ``CEC_RX_STATUS_OK`` - - 0x01 - - The message was received successfully. - * .. _`CEC-RX-STATUS-TIMEOUT`: - - - ``CEC_RX_STATUS_TIMEOUT`` - - 0x02 - - The reply to an earlier transmitted message timed out. - * .. _`CEC-RX-STATUS-FEATURE-ABORT`: - - - ``CEC_RX_STATUS_FEATURE_ABORT`` - - 0x04 - - The message was received successfully but the reply was - ``CEC_MSG_FEATURE_ABORT``. This status is only set if this message - was the reply to an earlier transmitted message. - * .. _`CEC-RX-STATUS-ABORTED`: - - - ``CEC_RX_STATUS_ABORTED`` - - 0x08 - - The wait for a reply to an earlier transmitted message was aborted - because the HDMI cable was disconnected, the adapter was unconfigured - or the :ref:`CEC_TRANSMIT <CEC_RECEIVE>` that waited for a - reply was interrupted. - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -The :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` can return the following -error codes: - -EAGAIN - No messages are in the receive queue, and the filehandle is in non-blocking mode. - -ETIMEDOUT - The ``timeout`` was reached while waiting for a message. - -ERESTARTSYS - The wait for a message was interrupted (e.g. by Ctrl-C). - -The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` can return the following -error codes: - -ENOTTY - The ``CEC_CAP_TRANSMIT`` capability wasn't set, so this ioctl is not supported. - -EPERM - The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` - has never been called, or ``CEC_MSG_FL_RAW`` was used from a process that - did not have the ``CAP_SYS_RAWIO`` capability. - -ENONET - The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` - was called, but the physical address is invalid so no logical address was claimed. - An exception is made in this case for transmits from initiator 0xf ('Unregistered') - to destination 0 ('TV'). In that case the transmit will proceed as usual. - -EBUSY - Another filehandle is in exclusive follower or initiator mode, or the filehandle - is in mode ``CEC_MODE_NO_INITIATOR``. This is also returned if the transmit - queue is full. - -EINVAL - The contents of struct :c:type:`cec_msg` is invalid. - -ERESTARTSYS - The wait for a successful transmit was interrupted (e.g. by Ctrl-C). diff --git a/Documentation/media/uapi/cec/cec-pin-error-inj.rst b/Documentation/media/uapi/cec/cec-pin-error-inj.rst deleted file mode 100644 index 725f8b1c9965..000000000000 --- a/Documentation/media/uapi/cec/cec-pin-error-inj.rst +++ /dev/null @@ -1,334 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -CEC Pin Framework Error Injection -================================= - -The CEC Pin Framework is a core CEC framework for CEC hardware that only -has low-level support for the CEC bus. Most hardware today will have -high-level CEC support where the hardware deals with driving the CEC bus, -but some older devices aren't that fancy. However, this framework also -allows you to connect the CEC pin to a GPIO on e.g. a Raspberry Pi and -you have now made a CEC adapter. - -What makes doing this so interesting is that since we have full control -over the bus it is easy to support error injection. This is ideal to -test how well CEC adapters can handle error conditions. - -Currently only the cec-gpio driver (when the CEC line is directly -connected to a pull-up GPIO line) and the AllWinner A10/A20 drm driver -support this framework. - -If ``CONFIG_CEC_PIN_ERROR_INJ`` is enabled, then error injection is available -through debugfs. Specifically, in ``/sys/kernel/debug/cec/cecX/`` there is -now an ``error-inj`` file. - -.. note:: - - The error injection commands are not a stable ABI and may change in the - future. - -With ``cat error-inj`` you can see both the possible commands and the current -error injection status:: - - $ cat /sys/kernel/debug/cec/cec0/error-inj - # Clear error injections: - # clear clear all rx and tx error injections - # rx-clear clear all rx error injections - # tx-clear clear all tx error injections - # <op> clear clear all rx and tx error injections for <op> - # <op> rx-clear clear all rx error injections for <op> - # <op> tx-clear clear all tx error injections for <op> - # - # RX error injection: - # <op>[,<mode>] rx-nack NACK the message instead of sending an ACK - # <op>[,<mode>] rx-low-drive <bit> force a low-drive condition at this bit position - # <op>[,<mode>] rx-add-byte add a spurious byte to the received CEC message - # <op>[,<mode>] rx-remove-byte remove the last byte from the received CEC message - # <op>[,<mode>] rx-arb-lost <poll> generate a POLL message to trigger an arbitration lost - # - # TX error injection settings: - # tx-ignore-nack-until-eom ignore early NACKs until EOM - # tx-custom-low-usecs <usecs> define the 'low' time for the custom pulse - # tx-custom-high-usecs <usecs> define the 'high' time for the custom pulse - # tx-custom-pulse transmit the custom pulse once the bus is idle - # - # TX error injection: - # <op>[,<mode>] tx-no-eom don't set the EOM bit - # <op>[,<mode>] tx-early-eom set the EOM bit one byte too soon - # <op>[,<mode>] tx-add-bytes <num> append <num> (1-255) spurious bytes to the message - # <op>[,<mode>] tx-remove-byte drop the last byte from the message - # <op>[,<mode>] tx-short-bit <bit> make this bit shorter than allowed - # <op>[,<mode>] tx-long-bit <bit> make this bit longer than allowed - # <op>[,<mode>] tx-custom-bit <bit> send the custom pulse instead of this bit - # <op>[,<mode>] tx-short-start send a start pulse that's too short - # <op>[,<mode>] tx-long-start send a start pulse that's too long - # <op>[,<mode>] tx-custom-start send the custom pulse instead of the start pulse - # <op>[,<mode>] tx-last-bit <bit> stop sending after this bit - # <op>[,<mode>] tx-low-drive <bit> force a low-drive condition at this bit position - # - # <op> CEC message opcode (0-255) or 'any' - # <mode> 'once' (default), 'always', 'toggle' or 'off' - # <bit> CEC message bit (0-159) - # 10 bits per 'byte': bits 0-7: data, bit 8: EOM, bit 9: ACK - # <poll> CEC poll message used to test arbitration lost (0x00-0xff, default 0x0f) - # <usecs> microseconds (0-10000000, default 1000) - - clear - -You can write error injection commands to ``error-inj`` using -``echo 'cmd' >error-inj`` or ``cat cmd.txt >error-inj``. The ``cat error-inj`` -output contains the current error commands. You can save the output to a file -and use it as an input to ``error-inj`` later. - -Basic Syntax ------------- - -Leading spaces/tabs are ignored. If the next character is a ``#`` or the end -of the line was reached, then the whole line is ignored. Otherwise a command -is expected. - -The error injection commands fall in two main groups: those relating to -receiving CEC messages and those relating to transmitting CEC messages. In -addition, there are commands to clear existing error injection commands and -to create custom pulses on the CEC bus. - -Most error injection commands can be executed for specific CEC opcodes or for -all opcodes (``any``). Each command also has a 'mode' which can be ``off`` -(can be used to turn off an existing error injection command), ``once`` -(the default) which will trigger the error injection only once for the next -received or transmitted message, ``always`` to always trigger the error -injection and ``toggle`` to toggle the error injection on or off for every -transmit or receive. - -So '``any rx-nack``' will NACK the next received CEC message, -'``any,always rx-nack``' will NACK all received CEC messages and -'``0x82,toggle rx-nack``' will only NACK if an Active Source message was -received and do that only for every other received message. - -After an error was injected with mode ``once`` the error injection command -is cleared automatically, so ``once`` is a one-time deal. - -All combinations of ``<op>`` and error injection commands can co-exist. So -this is fine:: - - 0x9e tx-add-bytes 1 - 0x9e tx-early-eom - 0x9f tx-add-bytes 2 - any rx-nack - -All four error injection commands will be active simultaneously. - -However, if the same ``<op>`` and command combination is specified, -but with different arguments:: - - 0x9e tx-add-bytes 1 - 0x9e tx-add-bytes 2 - -Then the second will overwrite the first. - -Clear Error Injections ----------------------- - -``clear`` - Clear all error injections. - -``rx-clear`` - Clear all receive error injections - -``tx-clear`` - Clear all transmit error injections - -``<op> clear`` - Clear all error injections for the given opcode. - -``<op> rx-clear`` - Clear all receive error injections for the given opcode. - -``<op> tx-clear`` - Clear all transmit error injections for the given opcode. - -Receive Messages ----------------- - -``<op>[,<mode>] rx-nack`` - NACK broadcast messages and messages directed to this CEC adapter. - Every byte of the message will be NACKed in case the transmitter - keeps transmitting after the first byte was NACKed. - -``<op>[,<mode>] rx-low-drive <bit>`` - Force a Low Drive condition at this bit position. If <op> specifies - a specific CEC opcode then the bit position must be at least 18, - otherwise the opcode hasn't been received yet. This tests if the - transmitter can handle the Low Drive condition correctly and reports - the error correctly. Note that a Low Drive in the first 4 bits can also - be interpreted as an Arbitration Lost condition by the transmitter. - This is implementation dependent. - -``<op>[,<mode>] rx-add-byte`` - Add a spurious 0x55 byte to the received CEC message, provided - the message was 15 bytes long or less. This is useful to test - the high-level protocol since spurious bytes should be ignored. - -``<op>[,<mode>] rx-remove-byte`` - Remove the last byte from the received CEC message, provided it - was at least 2 bytes long. This is useful to test the high-level - protocol since messages that are too short should be ignored. - -``<op>[,<mode>] rx-arb-lost <poll>`` - Generate a POLL message to trigger an Arbitration Lost condition. - This command is only allowed for ``<op>`` values of ``next`` or ``all``. - As soon as a start bit has been received the CEC adapter will switch - to transmit mode and it will transmit a POLL message. By default this is - 0x0f, but it can also be specified explicitly via the ``<poll>`` argument. - - This command can be used to test the Arbitration Lost condition in - the remote CEC transmitter. Arbitration happens when two CEC adapters - start sending a message at the same time. In that case the initiator - with the most leading zeroes wins and the other transmitter has to - stop transmitting ('Arbitration Lost'). This is very hard to test, - except by using this error injection command. - - This does not work if the remote CEC transmitter has logical address - 0 ('TV') since that will always win. - -Transmit Messages ------------------ - -``tx-ignore-nack-until-eom`` - This setting changes the behavior of transmitting CEC messages. Normally - as soon as the receiver NACKs a byte the transmit will stop, but the - specification also allows that the full message is transmitted and only - at the end will the transmitter look at the ACK bit. This is not - recommended behavior since there is no point in keeping the CEC bus busy - for longer than is strictly needed. Especially given how slow the bus is. - - This setting can be used to test how well a receiver deals with - transmitters that ignore NACKs until the very end of the message. - -``<op>[,<mode>] tx-no-eom`` - Don't set the EOM bit. Normally the last byte of the message has the EOM - (End-Of-Message) bit set. With this command the transmit will just stop - without ever sending an EOM. This can be used to test how a receiver - handles this case. Normally receivers have a time-out after which - they will go back to the Idle state. - -``<op>[,<mode>] tx-early-eom`` - Set the EOM bit one byte too soon. This obviously only works for messages - of two bytes or more. The EOM bit will be set for the second-to-last byte - and not for the final byte. The receiver should ignore the last byte in - this case. Since the resulting message is likely to be too short for this - same reason the whole message is typically ignored. The receiver should be - in Idle state after the last byte was transmitted. - -``<op>[,<mode>] tx-add-bytes <num>`` - Append ``<num>`` (1-255) spurious bytes to the message. The extra bytes - have the value of the byte position in the message. So if you transmit a - two byte message (e.g. a Get CEC Version message) and add 2 bytes, then - the full message received by the remote CEC adapter is - ``0x40 0x9f 0x02 0x03``. - - This command can be used to test buffer overflows in the receiver. E.g. - what does it do when it receives more than the maximum message size of 16 - bytes. - -``<op>[,<mode>] tx-remove-byte`` - Drop the last byte from the message, provided the message is at least - two bytes long. The receiver should ignore messages that are too short. - -``<op>[,<mode>] tx-short-bit <bit>`` - Make this bit period shorter than allowed. The bit position cannot be - an Ack bit. If <op> specifies a specific CEC opcode then the bit position - must be at least 18, otherwise the opcode hasn't been received yet. - Normally the period of a data bit is between 2.05 and 2.75 milliseconds. - With this command the period of this bit is 1.8 milliseconds, this is - done by reducing the time the CEC bus is high. This bit period is less - than is allowed and the receiver should respond with a Low Drive - condition. - - This command is ignored for 0 bits in bit positions 0 to 3. This is - because the receiver also looks for an Arbitration Lost condition in - those first four bits and it is undefined what will happen if it - sees a too-short 0 bit. - -``<op>[,<mode>] tx-long-bit <bit>`` - Make this bit period longer than is valid. The bit position cannot be - an Ack bit. If <op> specifies a specific CEC opcode then the bit position - must be at least 18, otherwise the opcode hasn't been received yet. - Normally the period of a data bit is between 2.05 and 2.75 milliseconds. - With this command the period of this bit is 2.9 milliseconds, this is - done by increasing the time the CEC bus is high. - - Even though this bit period is longer than is valid it is undefined what - a receiver will do. It might just accept it, or it might time out and - return to Idle state. Unfortunately the CEC specification is silent about - this. - - This command is ignored for 0 bits in bit positions 0 to 3. This is - because the receiver also looks for an Arbitration Lost condition in - those first four bits and it is undefined what will happen if it - sees a too-long 0 bit. - -``<op>[,<mode>] tx-short-start`` - Make this start bit period shorter than allowed. Normally the period of - a start bit is between 4.3 and 4.7 milliseconds. With this command the - period of the start bit is 4.1 milliseconds, this is done by reducing - the time the CEC bus is high. This start bit period is less than is - allowed and the receiver should return to Idle state when this is detected. - -``<op>[,<mode>] tx-long-start`` - Make this start bit period longer than is valid. Normally the period of - a start bit is between 4.3 and 4.7 milliseconds. With this command the - period of the start bit is 5 milliseconds, this is done by increasing - the time the CEC bus is high. This start bit period is more than is - valid and the receiver should return to Idle state when this is detected. - - Even though this start bit period is longer than is valid it is undefined - what a receiver will do. It might just accept it, or it might time out and - return to Idle state. Unfortunately the CEC specification is silent about - this. - -``<op>[,<mode>] tx-last-bit <bit>`` - Just stop transmitting after this bit. If <op> specifies a specific CEC - opcode then the bit position must be at least 18, otherwise the opcode - hasn't been received yet. This command can be used to test how the receiver - reacts when a message just suddenly stops. It should time out and go back - to Idle state. - -``<op>[,<mode>] tx-low-drive <bit>`` - Force a Low Drive condition at this bit position. If <op> specifies a - specific CEC opcode then the bit position must be at least 18, otherwise - the opcode hasn't been received yet. This can be used to test how the - receiver handles Low Drive conditions. Note that if this happens at bit - positions 0-3 the receiver can interpret this as an Arbitration Lost - condition. This is implementation dependent. - -Custom Pulses -------------- - -``tx-custom-low-usecs <usecs>`` - This defines the duration in microseconds that the custom pulse pulls - the CEC line low. The default is 1000 microseconds. - -``tx-custom-high-usecs <usecs>`` - This defines the duration in microseconds that the custom pulse keeps the - CEC line high (unless another CEC adapter pulls it low in that time). - The default is 1000 microseconds. The total period of the custom pulse is - ``tx-custom-low-usecs + tx-custom-high-usecs``. - -``<op>[,<mode>] tx-custom-bit <bit>`` - Send the custom bit instead of a regular data bit. The bit position cannot - be an Ack bit. If <op> specifies a specific CEC opcode then the bit - position must be at least 18, otherwise the opcode hasn't been received yet. - -``<op>[,<mode>] tx-custom-start`` - Send the custom bit instead of a regular start bit. - -``tx-custom-pulse`` - Transmit a single custom pulse as soon as the CEC bus is idle. diff --git a/Documentation/media/uapi/dvb/audio-bilingual-channel-select.rst b/Documentation/media/uapi/dvb/audio-bilingual-channel-select.rst deleted file mode 100644 index ee2ee74dafa3..000000000000 --- a/Documentation/media/uapi/dvb/audio-bilingual-channel-select.rst +++ /dev/null @@ -1,66 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_BILINGUAL_CHANNEL_SELECT: - -============================== -AUDIO_BILINGUAL_CHANNEL_SELECT -============================== - -Name ----- - -AUDIO_BILINGUAL_CHANNEL_SELECT - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_BILINGUAL_CHANNEL_SELECT, struct *audio_channel_select) - :name: AUDIO_BILINGUAL_CHANNEL_SELECT - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - audio_channel_select_t ch - - - Select the output format of the audio (mono left/right, stereo). - - -Description ------------ - -This ioctl is obsolete. Do not use in new drivers. It has been replaced -by the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` control -for MPEG decoders controlled through V4L2. - -This ioctl call asks the Audio Device to select the requested channel -for bilingual streams if possible. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-channel-select.rst b/Documentation/media/uapi/dvb/audio-channel-select.rst deleted file mode 100644 index ebb2f121c4c8..000000000000 --- a/Documentation/media/uapi/dvb/audio-channel-select.rst +++ /dev/null @@ -1,66 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_CHANNEL_SELECT: - -==================== -AUDIO_CHANNEL_SELECT -==================== - -Name ----- - -AUDIO_CHANNEL_SELECT - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_CHANNEL_SELECT, struct *audio_channel_select) - :name: AUDIO_CHANNEL_SELECT - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - audio_channel_select_t ch - - - Select the output format of the audio (mono left/right, stereo). - - -Description ------------ - -This ioctl is for Digital TV devices only. To control a V4L2 decoder use the -V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead. - -This ioctl call asks the Audio Device to select the requested channel if -possible. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-clear-buffer.rst b/Documentation/media/uapi/dvb/audio-clear-buffer.rst deleted file mode 100644 index c5b62cde18c8..000000000000 --- a/Documentation/media/uapi/dvb/audio-clear-buffer.rst +++ /dev/null @@ -1,55 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_CLEAR_BUFFER: - -================== -AUDIO_CLEAR_BUFFER -================== - -Name ----- - -AUDIO_CLEAR_BUFFER - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_CLEAR_BUFFER) - :name: AUDIO_CLEAR_BUFFER - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - -Description ------------ - -This ioctl call asks the Audio Device to clear all software and hardware -buffers of the audio decoder device. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-continue.rst b/Documentation/media/uapi/dvb/audio-continue.rst deleted file mode 100644 index 6bdc99e39e20..000000000000 --- a/Documentation/media/uapi/dvb/audio-continue.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_CONTINUE: - -============== -AUDIO_CONTINUE -============== - -Name ----- - -AUDIO_CONTINUE - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_CONTINUE) - :name: AUDIO_CONTINUE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - -Description ------------ - -This ioctl restarts the decoding and playing process previously paused -with AUDIO_PAUSE command. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-fclose.rst b/Documentation/media/uapi/dvb/audio-fclose.rst deleted file mode 100644 index 1e4ad7a0325d..000000000000 --- a/Documentation/media/uapi/dvb/audio-fclose.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _audio_fclose: - -======================== -Digital TV audio close() -======================== - -Name ----- - -Digital TV audio close() - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int close(int fd) - :name: dvb-audio-close - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - -Description ------------ - -This system call closes a previously opened audio device. - - -Return Value ------------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EBADF`` - - - fd is not a valid open file descriptor. diff --git a/Documentation/media/uapi/dvb/audio-fopen.rst b/Documentation/media/uapi/dvb/audio-fopen.rst deleted file mode 100644 index 2cf4d83661f4..000000000000 --- a/Documentation/media/uapi/dvb/audio-fopen.rst +++ /dev/null @@ -1,115 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _audio_fopen: - -======================= -Digital TV audio open() -======================= - -Name ----- - -Digital TV audio open() - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int open(const char *deviceName, int flags) - :name: dvb-audio-open - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - const char \*deviceName - - - Name of specific audio device. - - - .. row 2 - - - int flags - - - A bit-wise OR of the following flags: - - - .. row 3 - - - - - O_RDONLY read-only access - - - .. row 4 - - - - - O_RDWR read/write access - - - .. row 5 - - - - - O_NONBLOCK open in non-blocking mode - - - .. row 6 - - - - - (blocking mode is the default) - - -Description ------------ - -This system call opens a named audio device (e.g. -/dev/dvb/adapter0/audio0) for subsequent use. When an open() call has -succeeded, the device will be ready for use. The significance of -blocking or non-blocking mode is described in the documentation for -functions where there is a difference. It does not affect the semantics -of the open() call itself. A device opened in blocking mode can later be -put into non-blocking mode (and vice versa) using the F_SETFL command -of the fcntl system call. This is a standard system call, documented in -the Linux manual page for fcntl. Only one user can open the Audio Device -in O_RDWR mode. All other attempts to open the device in this mode will -fail, and an error code will be returned. If the Audio Device is opened -in O_RDONLY mode, the only ioctl call that can be used is -AUDIO_GET_STATUS. All other call will return with an error code. - - -Return Value ------------- - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``ENODEV`` - - - Device driver not loaded/available. - - - .. row 2 - - - ``EBUSY`` - - - Device or resource busy. - - - .. row 3 - - - ``EINVAL`` - - - Invalid argument. diff --git a/Documentation/media/uapi/dvb/audio-fwrite.rst b/Documentation/media/uapi/dvb/audio-fwrite.rst deleted file mode 100644 index 6dc6bf6cbbc7..000000000000 --- a/Documentation/media/uapi/dvb/audio-fwrite.rst +++ /dev/null @@ -1,91 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _audio_fwrite: - -========================= -Digital TV audio write() -========================= - -Name ----- - -Digital TV audio write() - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: size_t write(int fd, const void *buf, size_t count) - :name: dvb-audio-write - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - void \*buf - - - Pointer to the buffer containing the PES data. - - - .. row 3 - - - size_t count - - - Size of buf. - - -Description ------------ - -This system call can only be used if AUDIO_SOURCE_MEMORY is selected -in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in -PES format. If O_NONBLOCK is not specified the function will block -until buffer space is available. The amount of data to be transferred is -implied by count. - - -Return Value ------------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EPERM`` - - - Mode AUDIO_SOURCE_MEMORY not selected. - - - .. row 2 - - - ``ENOMEM`` - - - Attempted to write more data than the internal buffer can hold. - - - .. row 3 - - - ``EBADF`` - - - fd is not a valid open file descriptor. diff --git a/Documentation/media/uapi/dvb/audio-get-capabilities.rst b/Documentation/media/uapi/dvb/audio-get-capabilities.rst deleted file mode 100644 index 4f1ec47e8ac2..000000000000 --- a/Documentation/media/uapi/dvb/audio-get-capabilities.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_GET_CAPABILITIES: - -====================== -AUDIO_GET_CAPABILITIES -====================== - -Name ----- - -AUDIO_GET_CAPABILITIES - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_GET_CAPABILITIES, unsigned int *cap) - :name: AUDIO_GET_CAPABILITIES - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - unsigned int \*cap - - - Returns a bit array of supported sound formats. - - -Description ------------ - -This ioctl call asks the Audio Device to tell us about the decoding -capabilities of the audio hardware. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-get-status.rst b/Documentation/media/uapi/dvb/audio-get-status.rst deleted file mode 100644 index 30e4dd7fce6d..000000000000 --- a/Documentation/media/uapi/dvb/audio-get-status.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_GET_STATUS: - -================ -AUDIO_GET_STATUS -================ - -Name ----- - -AUDIO_GET_STATUS - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_GET_STATUS, struct audio_status *status) - :name: AUDIO_GET_STATUS - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - struct audio_status \*status - - - Returns the current state of Audio Device. - - -Description ------------ - -This ioctl call asks the Audio Device to return the current state of the -Audio Device. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-pause.rst b/Documentation/media/uapi/dvb/audio-pause.rst deleted file mode 100644 index 4567ecd9e0a3..000000000000 --- a/Documentation/media/uapi/dvb/audio-pause.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_PAUSE: - -=========== -AUDIO_PAUSE -=========== - -Name ----- - -AUDIO_PAUSE - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_PAUSE) - :name: AUDIO_PAUSE - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - -Description ------------ - -This ioctl call suspends the audio stream being played. Decoding and -playing are paused. It is then possible to restart again decoding and -playing process of the audio stream using AUDIO_CONTINUE command. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-play.rst b/Documentation/media/uapi/dvb/audio-play.rst deleted file mode 100644 index 17acd4c411b8..000000000000 --- a/Documentation/media/uapi/dvb/audio-play.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_PLAY: - -========== -AUDIO_PLAY -========== - -Name ----- - -AUDIO_PLAY - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_PLAY) - :name: AUDIO_PLAY - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - -Description ------------ - -This ioctl call asks the Audio Device to start playing an audio stream -from the selected source. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-select-source.rst b/Documentation/media/uapi/dvb/audio-select-source.rst deleted file mode 100644 index c5ed6243b11c..000000000000 --- a/Documentation/media/uapi/dvb/audio-select-source.rst +++ /dev/null @@ -1,65 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SELECT_SOURCE: - -=================== -AUDIO_SELECT_SOURCE -=================== - -Name ----- - -AUDIO_SELECT_SOURCE - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_SELECT_SOURCE, struct audio_stream_source *source) - :name: AUDIO_SELECT_SOURCE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - audio_stream_source_t source - - - Indicates the source that shall be used for the Audio stream. - - -Description ------------ - -This ioctl call informs the audio device which source shall be used for -the input data. The possible sources are demux or memory. If -AUDIO_SOURCE_MEMORY is selected, the data is fed to the Audio Device -through the write command. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-set-av-sync.rst b/Documentation/media/uapi/dvb/audio-set-av-sync.rst deleted file mode 100644 index c116d105fdea..000000000000 --- a/Documentation/media/uapi/dvb/audio-set-av-sync.rst +++ /dev/null @@ -1,67 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SET_AV_SYNC: - -================= -AUDIO_SET_AV_SYNC -================= - -Name ----- - -AUDIO_SET_AV_SYNC - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_SET_AV_SYNC, boolean state) - :name: AUDIO_SET_AV_SYNC - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - boolean state - - - Tells the Digital TV subsystem if A/V synchronization shall be ON or OFF. - - TRUE: AV-sync ON - - FALSE: AV-sync OFF - - -Description ------------ - -This ioctl call asks the Audio Device to turn ON or OFF A/V -synchronization. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-set-bypass-mode.rst b/Documentation/media/uapi/dvb/audio-set-bypass-mode.rst deleted file mode 100644 index d68f05d48d12..000000000000 --- a/Documentation/media/uapi/dvb/audio-set-bypass-mode.rst +++ /dev/null @@ -1,70 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SET_BYPASS_MODE: - -===================== -AUDIO_SET_BYPASS_MODE -===================== - -Name ----- - -AUDIO_SET_BYPASS_MODE - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_SET_BYPASS_MODE, boolean mode) - :name: AUDIO_SET_BYPASS_MODE - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - boolean mode - - - Enables or disables the decoding of the current Audio stream in - the Digital TV subsystem. - - TRUE: Bypass is disabled - - FALSE: Bypass is enabled - - -Description ------------ - -This ioctl call asks the Audio Device to bypass the Audio decoder and -forward the stream without decoding. This mode shall be used if streams -that can’t be handled by the Digital TV system shall be decoded. Dolby -DigitalTM streams are automatically forwarded by the Digital TV subsystem if -the hardware can handle it. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-set-id.rst b/Documentation/media/uapi/dvb/audio-set-id.rst deleted file mode 100644 index aeb6ace6cd1e..000000000000 --- a/Documentation/media/uapi/dvb/audio-set-id.rst +++ /dev/null @@ -1,67 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SET_ID: - -============ -AUDIO_SET_ID -============ - -Name ----- - -AUDIO_SET_ID - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_SET_ID, int id) - :name: AUDIO_SET_ID - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - int id - - - audio sub-stream id - - -Description ------------ - -This ioctl selects which sub-stream is to be decoded if a program or -system stream is sent to the video device. If no audio stream type is -set the id has to be in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for -AC3 and in [0xA0,0xA7] for LPCM. More specifications may follow for -other stream types. If the stream type is set the id just specifies the -substream id of the audio stream and only the first 5 bits are -recognized. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-set-mixer.rst b/Documentation/media/uapi/dvb/audio-set-mixer.rst deleted file mode 100644 index 60781aa88202..000000000000 --- a/Documentation/media/uapi/dvb/audio-set-mixer.rst +++ /dev/null @@ -1,61 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SET_MIXER: - -=============== -AUDIO_SET_MIXER -=============== - -Name ----- - -AUDIO_SET_MIXER - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_SET_MIXER, struct audio_mixer *mix) - :name: AUDIO_SET_MIXER - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - audio_mixer_t \*mix - - - mixer settings. - - -Description ------------ - -This ioctl lets you adjust the mixer settings of the audio decoder. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-set-mute.rst b/Documentation/media/uapi/dvb/audio-set-mute.rst deleted file mode 100644 index 4449f225e48c..000000000000 --- a/Documentation/media/uapi/dvb/audio-set-mute.rst +++ /dev/null @@ -1,71 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SET_MUTE: - -============== -AUDIO_SET_MUTE -============== - -Name ----- - -AUDIO_SET_MUTE - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_SET_MUTE, boolean state) - :name: AUDIO_SET_MUTE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - boolean state - - - Indicates if audio device shall mute or not. - - TRUE: Audio Mute - - FALSE: Audio Un-mute - - -Description ------------ - -This ioctl is for Digital TV devices only. To control a V4L2 decoder use the -V4L2 :ref:`VIDIOC_DECODER_CMD` with the -``V4L2_DEC_CMD_START_MUTE_AUDIO`` flag instead. - -This ioctl call asks the audio device to mute the stream that is -currently being played. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio-set-streamtype.rst b/Documentation/media/uapi/dvb/audio-set-streamtype.rst deleted file mode 100644 index d20c34fc7128..000000000000 --- a/Documentation/media/uapi/dvb/audio-set-streamtype.rst +++ /dev/null @@ -1,77 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_SET_STREAMTYPE: - -==================== -AUDIO_SET_STREAMTYPE -==================== - -Name ----- - -AUDIO_SET_STREAMTYPE - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(fd, AUDIO_SET_STREAMTYPE, int type) - :name: AUDIO_SET_STREAMTYPE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - - - - int fd - - - File descriptor returned by a previous call to open(). - - - - - - int type - - - stream type - - -Description ------------ - -This ioctl tells the driver which kind of audio stream to expect. This -is useful if the stream offers several audio sub-streams like LPCM and -AC3. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EINVAL`` - - - type is not a valid or supported stream type. diff --git a/Documentation/media/uapi/dvb/audio-stop.rst b/Documentation/media/uapi/dvb/audio-stop.rst deleted file mode 100644 index 1bba2e50c364..000000000000 --- a/Documentation/media/uapi/dvb/audio-stop.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _AUDIO_STOP: - -========== -AUDIO_STOP -========== - -Name ----- - -AUDIO_STOP - -.. attention:: This ioctl is deprecated - -Synopsis --------- - -.. c:function:: int ioctl(int fd, AUDIO_STOP) - :name: AUDIO_STOP - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - -Description ------------ - -This ioctl call asks the Audio Device to stop playing the current -stream. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/audio.rst b/Documentation/media/uapi/dvb/audio.rst deleted file mode 100644 index ebc18fca76a4..000000000000 --- a/Documentation/media/uapi/dvb/audio.rst +++ /dev/null @@ -1,34 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_audio: - -####################### -Digital TV Audio Device -####################### - -The Digital TV audio device controls the MPEG2 audio decoder of the Digital -TV hardware. It can be accessed through ``/dev/dvb/adapter?/audio?``. Data -types and and ioctl definitions can be accessed by including -``linux/dvb/audio.h`` in your application. - -Please note that some Digital TV cards don’t have their own MPEG decoder, which -results in the omission of the audio and video device. - -These ioctls were also used by V4L2 to control MPEG decoders implemented -in V4L2. The use of these ioctls for that purpose has been made obsolete -and proper V4L2 ioctls or controls have been created to replace that -functionality. - - -.. toctree:: - :maxdepth: 1 - - audio_data_types - audio_function_calls diff --git a/Documentation/media/uapi/dvb/audio_data_types.rst b/Documentation/media/uapi/dvb/audio_data_types.rst deleted file mode 100644 index 5b032fe13b9d..000000000000 --- a/Documentation/media/uapi/dvb/audio_data_types.rst +++ /dev/null @@ -1,123 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _audio_data_types: - -**************** -Audio Data Types -**************** - -This section describes the structures, data types and defines used when -talking to the audio device. - -.. c:type:: audio_stream_source - -The audio stream source is set through the AUDIO_SELECT_SOURCE call -and can take the following values, depending on whether we are replaying -from an internal (demux) or external (user write) source. - - -.. code-block:: c - - typedef enum { - AUDIO_SOURCE_DEMUX, - AUDIO_SOURCE_MEMORY - } audio_stream_source_t; - -AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the -frontend or the DVR device) as the source of the video stream. If -AUDIO_SOURCE_MEMORY is selected the stream comes from the application -through the ``write()`` system call. - - -.. c:type:: audio_play_state - -The following values can be returned by the AUDIO_GET_STATUS call -representing the state of audio playback. - - -.. code-block:: c - - typedef enum { - AUDIO_STOPPED, - AUDIO_PLAYING, - AUDIO_PAUSED - } audio_play_state_t; - - -.. c:type:: audio_channel_select - -The audio channel selected via AUDIO_CHANNEL_SELECT is determined by -the following values. - - -.. code-block:: c - - typedef enum { - AUDIO_STEREO, - AUDIO_MONO_LEFT, - AUDIO_MONO_RIGHT, - AUDIO_MONO, - AUDIO_STEREO_SWAPPED - } audio_channel_select_t; - - -.. c:type:: audio_status - -The AUDIO_GET_STATUS call returns the following structure informing -about various states of the playback operation. - - -.. code-block:: c - - typedef struct audio_status { - boolean AV_sync_state; - boolean mute_state; - audio_play_state_t play_state; - audio_stream_source_t stream_source; - audio_channel_select_t channel_select; - boolean bypass_mode; - audio_mixer_t mixer_state; - } audio_status_t; - - -.. c:type:: audio_mixer - -The following structure is used by the AUDIO_SET_MIXER call to set the -audio volume. - - -.. code-block:: c - - typedef struct audio_mixer { - unsigned int volume_left; - unsigned int volume_right; - } audio_mixer_t; - - -.. _audio_encodings: - -audio encodings -=============== - -A call to AUDIO_GET_CAPABILITIES returns an unsigned integer with the -following bits set according to the hardwares capabilities. - - -.. code-block:: c - - #define AUDIO_CAP_DTS 1 - #define AUDIO_CAP_LPCM 2 - #define AUDIO_CAP_MP1 4 - #define AUDIO_CAP_MP2 8 - #define AUDIO_CAP_MP3 16 - #define AUDIO_CAP_AAC 32 - #define AUDIO_CAP_OGG 64 - #define AUDIO_CAP_SDDS 128 - #define AUDIO_CAP_AC3 256 diff --git a/Documentation/media/uapi/dvb/audio_function_calls.rst b/Documentation/media/uapi/dvb/audio_function_calls.rst deleted file mode 100644 index 5478e78b085e..000000000000 --- a/Documentation/media/uapi/dvb/audio_function_calls.rst +++ /dev/null @@ -1,37 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _audio_function_calls: - -******************** -Audio Function Calls -******************** - -.. toctree:: - :maxdepth: 1 - - audio-fopen - audio-fclose - audio-fwrite - audio-stop - audio-play - audio-pause - audio-continue - audio-select-source - audio-set-mute - audio-set-av-sync - audio-set-bypass-mode - audio-channel-select - audio-bilingual-channel-select - audio-get-status - audio-get-capabilities - audio-clear-buffer - audio-set-id - audio-set-mixer - audio-set-streamtype diff --git a/Documentation/media/uapi/dvb/ca-fclose.rst b/Documentation/media/uapi/dvb/ca-fclose.rst deleted file mode 100644 index e273444ccc67..000000000000 --- a/Documentation/media/uapi/dvb/ca-fclose.rst +++ /dev/null @@ -1,50 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _ca_fclose: - -===================== -Digital TV CA close() -===================== - -Name ----- - -Digital TV CA close() - - -Synopsis --------- - -.. c:function:: int close(int fd) - :name: dvb-ca-close - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. - -Description ------------ - -This system call closes a previously opened CA device. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-fopen.rst b/Documentation/media/uapi/dvb/ca-fopen.rst deleted file mode 100644 index e11ebeae5693..000000000000 --- a/Documentation/media/uapi/dvb/ca-fopen.rst +++ /dev/null @@ -1,84 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _ca_fopen: - -==================== -Digital TV CA open() -==================== - -Name ----- - -Digital TV CA open() - - -Synopsis --------- - -.. c:function:: int open(const char *name, int flags) - :name: dvb-ca-open - - -Arguments ---------- - -``name`` - Name of specific Digital TV CA device. - -``flags`` - A bit-wise OR of the following flags: - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - ``O_RDONLY`` - - read-only access - - - - ``O_RDWR`` - - read/write access - - - - ``O_NONBLOCK`` - - open in non-blocking mode - (blocking mode is the default) - - -Description ------------ - -This system call opens a named ca device (e.g. ``/dev/dvb/adapter?/ca?``) -for subsequent use. - -When an ``open()`` call has succeeded, the device will be ready for use. The -significance of blocking or non-blocking mode is described in the -documentation for functions where there is a difference. It does not -affect the semantics of the ``open()`` call itself. A device opened in -blocking mode can later be put into non-blocking mode (and vice versa) -using the ``F_SETFL`` command of the ``fcntl`` system call. This is a -standard system call, documented in the Linux manual page for fcntl. -Only one user can open the CA Device in ``O_RDWR`` mode. All other -attempts to open the device in this mode will fail, and an error code -will be returned. - - -Return Value ------------- - - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-get-cap.rst b/Documentation/media/uapi/dvb/ca-get-cap.rst deleted file mode 100644 index 9e4fb5186373..000000000000 --- a/Documentation/media/uapi/dvb/ca-get-cap.rst +++ /dev/null @@ -1,53 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_GET_CAP: - -========== -CA_GET_CAP -========== - -Name ----- - -CA_GET_CAP - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_GET_CAP, struct ca_caps *caps) - :name: CA_GET_CAP - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. - -``caps`` - Pointer to struct :c:type:`ca_caps`. - -Description ------------ - -Queries the Kernel for information about the available CA and descrambler -slots, and their types. - -Return Value ------------- - -On success 0 is returned and :c:type:`ca_caps` is filled. - -On error, -1 is returned and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-get-descr-info.rst b/Documentation/media/uapi/dvb/ca-get-descr-info.rst deleted file mode 100644 index 80ef43a339df..000000000000 --- a/Documentation/media/uapi/dvb/ca-get-descr-info.rst +++ /dev/null @@ -1,49 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_GET_DESCR_INFO: - -================= -CA_GET_DESCR_INFO -================= - -Name ----- - -CA_GET_DESCR_INFO - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_GET_DESCR_INFO, struct ca_descr_info *desc) - :name: CA_GET_DESCR_INFO - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. - -``desc`` - Pointer to struct :c:type:`ca_descr_info`. - -Description ------------ - -Returns information about all descrambler slots. - -Return Value ------------- - -On success 0 is returned, and :c:type:`ca_descr_info` is filled. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-get-msg.rst b/Documentation/media/uapi/dvb/ca-get-msg.rst deleted file mode 100644 index bcb7955a0ddc..000000000000 --- a/Documentation/media/uapi/dvb/ca-get-msg.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_GET_MSG: - -========== -CA_GET_MSG -========== - -Name ----- - -CA_GET_MSG - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_GET_MSG, struct ca_msg *msg) - :name: CA_GET_MSG - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. - -``msg`` - Pointer to struct :c:type:`ca_msg`. - -Description ------------ - -Receives a message via a CI CA module. - -.. note:: - - Please notice that, on most drivers, this is done by reading from - the /dev/adapter?/ca? device node. - - -Return Value ------------- - - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-get-slot-info.rst b/Documentation/media/uapi/dvb/ca-get-slot-info.rst deleted file mode 100644 index 1ea5c497f2ea..000000000000 --- a/Documentation/media/uapi/dvb/ca-get-slot-info.rst +++ /dev/null @@ -1,64 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_GET_SLOT_INFO: - -================ -CA_GET_SLOT_INFO -================ - -Name ----- - -CA_GET_SLOT_INFO - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_GET_SLOT_INFO, struct ca_slot_info *info) - :name: CA_GET_SLOT_INFO - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <cec-open>`. - -``info`` - Pointer to struct :c:type:`ca_slot_info`. - -Description ------------ - -Returns information about a CA slot identified by -:c:type:`ca_slot_info`.slot_num. - - -Return Value ------------- - -On success 0 is returned, and :c:type:`ca_slot_info` is filled. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - ``ENODEV`` - - the slot is not available. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-reset.rst b/Documentation/media/uapi/dvb/ca-reset.rst deleted file mode 100644 index 29fda19984be..000000000000 --- a/Documentation/media/uapi/dvb/ca-reset.rst +++ /dev/null @@ -1,51 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_RESET: - -======== -CA_RESET -======== - -Name ----- - -CA_RESET - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_RESET) - :name: CA_RESET - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <cec-open>`. - -Description ------------ - -Puts the Conditional Access hardware on its initial state. It should -be called before start using the CA hardware. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-send-msg.rst b/Documentation/media/uapi/dvb/ca-send-msg.rst deleted file mode 100644 index 5a3c4e8120c4..000000000000 --- a/Documentation/media/uapi/dvb/ca-send-msg.rst +++ /dev/null @@ -1,58 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_SEND_MSG: - -=========== -CA_SEND_MSG -=========== - -Name ----- - -CA_SEND_MSG - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_SEND_MSG, struct ca_msg *msg) - :name: CA_SEND_MSG - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <cec-open>`. - -``msg`` - Pointer to struct :c:type:`ca_msg`. - - -Description ------------ - -Sends a message via a CI CA module. - -.. note:: - - Please notice that, on most drivers, this is done by writing - to the /dev/adapter?/ca? device node. - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca-set-descr.rst b/Documentation/media/uapi/dvb/ca-set-descr.rst deleted file mode 100644 index d36464ba2317..000000000000 --- a/Documentation/media/uapi/dvb/ca-set-descr.rst +++ /dev/null @@ -1,53 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _CA_SET_DESCR: - -============ -CA_SET_DESCR -============ - -Name ----- - -CA_SET_DESCR - - -Synopsis --------- - -.. c:function:: int ioctl(fd, CA_SET_DESCR, struct ca_descr *desc) - :name: CA_SET_DESCR - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <cec-open>`. - -``msg`` - Pointer to struct :c:type:`ca_descr`. - -Description ------------ - -CA_SET_DESCR is used for feeding descrambler CA slots with descrambling -keys (referred as control words). - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/ca.rst b/Documentation/media/uapi/dvb/ca.rst deleted file mode 100644 index 8796512c1378..000000000000 --- a/Documentation/media/uapi/dvb/ca.rst +++ /dev/null @@ -1,31 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_ca: - -#################### -Digital TV CA Device -#################### - -The Digital TV CA device controls the conditional access hardware. It -can be accessed through ``/dev/dvb/adapter?/ca?``. Data types and and ioctl -definitions can be accessed by including ``linux/dvb/ca.h`` in your -application. - -.. note:: - - There are three ioctls at this API that aren't documented: - :ref:`CA_GET_MSG`, :ref:`CA_SEND_MSG` and :ref:`CA_SET_DESCR`. - Documentation for them are welcome. - -.. toctree:: - :maxdepth: 1 - - ca_data_types - ca_function_calls diff --git a/Documentation/media/uapi/dvb/ca_data_types.rst b/Documentation/media/uapi/dvb/ca_data_types.rst deleted file mode 100644 index 834c8ab4c300..000000000000 --- a/Documentation/media/uapi/dvb/ca_data_types.rst +++ /dev/null @@ -1,16 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _ca_data_types: - -************* -CA Data Types -************* - -.. kernel-doc:: include/uapi/linux/dvb/ca.h diff --git a/Documentation/media/uapi/dvb/ca_function_calls.rst b/Documentation/media/uapi/dvb/ca_function_calls.rst deleted file mode 100644 index 6985bebd0661..000000000000 --- a/Documentation/media/uapi/dvb/ca_function_calls.rst +++ /dev/null @@ -1,27 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _ca_function_calls: - -***************** -CA Function Calls -***************** - -.. toctree:: - :maxdepth: 1 - - ca-fopen - ca-fclose - ca-reset - ca-get-cap - ca-get-slot-info - ca-get-descr-info - ca-get-msg - ca-send-msg - ca-set-descr diff --git a/Documentation/media/uapi/dvb/demux.rst b/Documentation/media/uapi/dvb/demux.rst deleted file mode 100644 index d8c0ff4015fe..000000000000 --- a/Documentation/media/uapi/dvb/demux.rst +++ /dev/null @@ -1,30 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_demux: - -####################### -Digital TV Demux Device -####################### - -The Digital TV demux device controls the MPEG-TS filters for the -digital TV. If the driver and hardware supports, those filters are -implemented at the hardware. Otherwise, the Kernel provides a software -emulation. - -It can be accessed through ``/dev/adapter?/demux?``. Data types and and -ioctl definitions can be accessed by including ``linux/dvb/dmx.h`` in -your application. - - -.. toctree:: - :maxdepth: 1 - - dmx_types - dmx_fcalls diff --git a/Documentation/media/uapi/dvb/dmx-add-pid.rst b/Documentation/media/uapi/dvb/dmx-add-pid.rst deleted file mode 100644 index f483268e4ede..000000000000 --- a/Documentation/media/uapi/dvb/dmx-add-pid.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_ADD_PID: - -=========== -DMX_ADD_PID -=========== - -Name ----- - -DMX_ADD_PID - - -Synopsis --------- - -.. c:function:: int ioctl(fd, DMX_ADD_PID, __u16 *pid) - :name: DMX_ADD_PID - - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``pid`` - PID number to be filtered. - - -Description ------------ - -This ioctl call allows to add multiple PIDs to a transport stream filter -previously set up with :ref:`DMX_SET_PES_FILTER` and output equal to -:c:type:`DMX_OUT_TSDEMUX_TAP <dmx_output>`. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-expbuf.rst b/Documentation/media/uapi/dvb/dmx-expbuf.rst deleted file mode 100644 index d7f0658f3db3..000000000000 --- a/Documentation/media/uapi/dvb/dmx-expbuf.rst +++ /dev/null @@ -1,97 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_EXPBUF: - -**************** -ioctl DMX_EXPBUF -**************** - -Name -==== - -DMX_EXPBUF - Export a buffer as a DMABUF file descriptor. - -.. warning:: this API is still experimental - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, DMX_EXPBUF, struct dmx_exportbuffer *argp ) - :name: DMX_EXPBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <dmx_fopen>`. - -``argp`` - Pointer to struct :c:type:`dmx_exportbuffer`. - - -Description -=========== - -This ioctl is an extension to the memory mapping I/O method. -It can be used to export a buffer as a DMABUF file at any time after -buffers have been allocated with the :ref:`DMX_REQBUFS` ioctl. - -To export a buffer, applications fill struct :c:type:`dmx_exportbuffer`. -Applications must set the ``index`` field. Valid index numbers -range from zero to the number of buffers allocated with :ref:`DMX_REQBUFS` -(struct :c:type:`dmx_requestbuffers` ``count``) minus one. -Additional flags may be posted in the ``flags`` field. Refer to a manual -for open() for details. Currently only O_CLOEXEC, O_RDONLY, O_WRONLY, -and O_RDWR are supported. -All other fields must be set to zero. In the -case of multi-planar API, every plane is exported separately using -multiple :ref:`DMX_EXPBUF` calls. - -After calling :ref:`DMX_EXPBUF` the ``fd`` field will be set by a -driver, on success. This is a DMABUF file descriptor. The application may -pass it to other DMABUF-aware devices. It is recommended to close a DMABUF -file when it is no longer used to allow the associated memory to be reclaimed. - - -Examples -======== - - -.. code-block:: c - - int buffer_export(int v4lfd, enum dmx_buf_type bt, int index, int *dmafd) - { - struct dmx_exportbuffer expbuf; - - memset(&expbuf, 0, sizeof(expbuf)); - expbuf.type = bt; - expbuf.index = index; - if (ioctl(v4lfd, DMX_EXPBUF, &expbuf) == -1) { - perror("DMX_EXPBUF"); - return -1; - } - - *dmafd = expbuf.fd; - - return 0; - } - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - A queue is not in MMAP mode or DMABUF exporting is not supported or - ``flags`` or ``index`` fields are invalid. diff --git a/Documentation/media/uapi/dvb/dmx-fclose.rst b/Documentation/media/uapi/dvb/dmx-fclose.rst deleted file mode 100644 index 05ff32270274..000000000000 --- a/Documentation/media/uapi/dvb/dmx-fclose.rst +++ /dev/null @@ -1,52 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx_fclose: - -======================== -Digital TV demux close() -======================== - -Name ----- - -Digital TV demux close() - - -Synopsis --------- - -.. c:function:: int close(int fd) - :name: dvb-dmx-close - - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to - :c:func:`open() <dvb-dmx-open>`. - -Description ------------ - -This system call deactivates and deallocates a filter that was -previously allocated via the :c:func:`open() <dvb-dmx-open>` call. - - -Return Value ------------- - -On success 0 is returned. - -On error, -1 is returned and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-fopen.rst b/Documentation/media/uapi/dvb/dmx-fopen.rst deleted file mode 100644 index 2700a2fad68b..000000000000 --- a/Documentation/media/uapi/dvb/dmx-fopen.rst +++ /dev/null @@ -1,98 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx_fopen: - -======================= -Digital TV demux open() -======================= - -Name ----- - -Digital TV demux open() - - -Synopsis --------- - -.. c:function:: int open(const char *deviceName, int flags) - :name: dvb-dmx-open - -Arguments ---------- - -``name`` - Name of specific Digital TV demux device. - -``flags`` - A bit-wise OR of the following flags: - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - - ``O_RDONLY`` - - read-only access - - - - - ``O_RDWR`` - - read/write access - - - - - ``O_NONBLOCK`` - - open in non-blocking mode - (blocking mode is the default) - - -Description ------------ - -This system call, used with a device name of ``/dev/dvb/adapter?/demux?``, -allocates a new filter and returns a handle which can be used for -subsequent control of that filter. This call has to be made for each -filter to be used, i.e. every returned file descriptor is a reference to -a single filter. ``/dev/dvb/adapter?/dvr?`` is a logical device to be used -for retrieving Transport Streams for digital video recording. When -reading from this device a transport stream containing the packets from -all PES filters set in the corresponding demux device -(``/dev/dvb/adapter?/demux?``) having the output set to ``DMX_OUT_TS_TAP``. -A recorded Transport Stream is replayed by writing to this device. - -The significance of blocking or non-blocking mode is described in the -documentation for functions where there is a difference. It does not -affect the semantics of the ``open()`` call itself. A device opened -in blocking mode can later be put into non-blocking mode (and vice versa) -using the ``F_SETFL`` command of the fcntl system call. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - ``EMFILE`` - - “Too many open files”, i.e. no more filters available. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-fread.rst b/Documentation/media/uapi/dvb/dmx-fread.rst deleted file mode 100644 index 292fa98f39ff..000000000000 --- a/Documentation/media/uapi/dvb/dmx-fread.rst +++ /dev/null @@ -1,87 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx_fread: - -======================= -Digital TV demux read() -======================= - -Name ----- - -Digital TV demux read() - - -Synopsis --------- - -.. c:function:: size_t read(int fd, void *buf, size_t count) - :name: dvb-dmx-read - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. - - ``buf`` - Buffer to be filled - -``count`` - Max number of bytes to read - -Description ------------ - -This system call returns filtered data, which might be section or Packetized -Elementary Stream (PES) data. The filtered data is transferred from -the driver’s internal circular buffer to ``buf``. The maximum amount of data -to be transferred is implied by count. - -.. note:: - - if a section filter created with - :c:type:`DMX_CHECK_CRC <dmx_sct_filter_params>` flag set, - data that fails on CRC check will be silently ignored. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - ``EWOULDBLOCK`` - - No data to return and ``O_NONBLOCK`` was specified. - - - - ``EOVERFLOW`` - - The filtered data was not read from the buffer in due time, - resulting in non-read data being lost. The buffer is flushed. - - - - ``ETIMEDOUT`` - - The section was not loaded within the stated timeout period. - See ioctl :ref:`DMX_SET_FILTER` for how to set a timeout. - - - - ``EFAULT`` - - The driver failed to write to the callers buffer due to an - invalid \*buf pointer. - - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-fwrite.rst b/Documentation/media/uapi/dvb/dmx-fwrite.rst deleted file mode 100644 index bdd4d4743bd5..000000000000 --- a/Documentation/media/uapi/dvb/dmx-fwrite.rst +++ /dev/null @@ -1,79 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx_fwrite: - -======================== -Digital TV demux write() -======================== - -Name ----- - -Digital TV demux write() - - -Synopsis --------- - -.. c:function:: ssize_t write(int fd, const void *buf, size_t count) - :name: dvb-dmx-write - -Arguments ---------- - -``fd`` - File descriptor returned by a previous call to :c:func:`open() <dvb-ca-open>`. - -``buf`` - Buffer with data to be written - -``count`` - Number of bytes at the buffer - -Description ------------ - -This system call is only provided by the logical device -``/dev/dvb/adapter?/dvr?``, associated with the physical demux device that -provides the actual DVR functionality. It is used for replay of a -digitally recorded Transport Stream. Matching filters have to be defined -in the corresponding physical demux device, ``/dev/dvb/adapter?/demux?``. -The amount of data to be transferred is implied by count. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - ``EWOULDBLOCK`` - - No data was written. This might happen if ``O_NONBLOCK`` was - specified and there is no more buffer space available (if - ``O_NONBLOCK`` is not specified the function will block until buffer - space is available). - - - - ``EBUSY`` - - This error code indicates that there are conflicting requests. The - corresponding demux device is setup to receive data from the - front- end. Make sure that these filters are stopped and that the - filters with input set to ``DMX_IN_DVR`` are started. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst b/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst deleted file mode 100644 index fcd3dc06c095..000000000000 --- a/Documentation/media/uapi/dvb/dmx-get-pes-pids.rst +++ /dev/null @@ -1,71 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_GET_PES_PIDS: - -================ -DMX_GET_PES_PIDS -================ - -Name ----- - -DMX_GET_PES_PIDS - - -Synopsis --------- - -.. c:function:: int ioctl(fd, DMX_GET_PES_PIDS, __u16 pids[5]) - :name: DMX_GET_PES_PIDS - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``pids`` - Array used to store 5 Program IDs. - - -Description ------------ - -This ioctl allows to query a DVB device to return the first PID used -by audio, video, textext, subtitle and PCR programs on a given service. -They're stored as: - -======================= ======== ======================================= -PID element position content -======================= ======== ======================================= -pids[DMX_PES_AUDIO] 0 first audio PID -pids[DMX_PES_VIDEO] 1 first video PID -pids[DMX_PES_TELETEXT] 2 first teletext PID -pids[DMX_PES_SUBTITLE] 3 first subtitle PID -pids[DMX_PES_PCR] 4 first Program Clock Reference PID -======================= ======== ======================================= - - -.. note:: - - A value equal to 0xffff means that the PID was not filled by the - Kernel. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-get-stc.rst b/Documentation/media/uapi/dvb/dmx-get-stc.rst deleted file mode 100644 index 2c81595f470a..000000000000 --- a/Documentation/media/uapi/dvb/dmx-get-stc.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_GET_STC: - -=========== -DMX_GET_STC -=========== - -Name ----- - -DMX_GET_STC - - -Synopsis --------- - -.. c:function:: int ioctl( int fd, DMX_GET_STC, struct dmx_stc *stc) - :name: DMX_GET_STC - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``stc`` - Pointer to :c:type:`dmx_stc` where the stc data is to be stored. - - -Description ------------ - -This ioctl call returns the current value of the system time counter -(which is driven by a PES filter of type :c:type:`DMX_PES_PCR <dmx_ts_pes>`). -Some hardware supports more than one STC, so you must specify which one by -setting the :c:type:`num <dmx_stc>` field of stc before the ioctl (range 0...n). -The result is returned in form of a ratio with a 64 bit numerator -and a 32 bit denominator, so the real 90kHz STC value is -``stc->stc / stc->base``. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - .. row 1 - - - ``EINVAL`` - - - Invalid stc number. - - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-mmap.rst b/Documentation/media/uapi/dvb/dmx-mmap.rst deleted file mode 100644 index 34bb7766718f..000000000000 --- a/Documentation/media/uapi/dvb/dmx-mmap.rst +++ /dev/null @@ -1,125 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx-mmap: - -***************** -Digital TV mmap() -***************** - -Name -==== - -dmx-mmap - Map device memory into application address space - -.. warning:: this API is still experimental - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - #include <sys/mman.h> - - -.. c:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset ) - :name: dmx-mmap - -Arguments -========= - -``start`` - Map the buffer to this address in the application's address space. - When the ``MAP_FIXED`` flag is specified, ``start`` must be a - multiple of the pagesize and mmap will fail when the specified - address cannot be used. Use of this option is discouraged; - applications should just specify a ``NULL`` pointer here. - -``length`` - Length of the memory area to map. This must be a multiple of the - DVB packet length (188, on most drivers). - -``prot`` - The ``prot`` argument describes the desired memory protection. - Regardless of the device type and the direction of data exchange it - should be set to ``PROT_READ`` | ``PROT_WRITE``, permitting read - and write access to image buffers. Drivers should support at least - this combination of flags. - -``flags`` - The ``flags`` parameter specifies the type of the mapped object, - mapping options and whether modifications made to the mapped copy of - the page are private to the process or are to be shared with other - references. - - ``MAP_FIXED`` requests that the driver selects no other address than - the one specified. If the specified address cannot be used, - :ref:`mmap() <dmx-mmap>` will fail. If ``MAP_FIXED`` is specified, - ``start`` must be a multiple of the pagesize. Use of this option is - discouraged. - - One of the ``MAP_SHARED`` or ``MAP_PRIVATE`` flags must be set. - ``MAP_SHARED`` allows applications to share the mapped memory with - other (e. g. child-) processes. - - .. note:: - - The Linux Digital TV applications should not set the - ``MAP_PRIVATE``, ``MAP_DENYWRITE``, ``MAP_EXECUTABLE`` or ``MAP_ANON`` - flags. - -``fd`` - File descriptor returned by :ref:`open() <dmx_fopen>`. - -``offset`` - Offset of the buffer in device memory, as returned by - :ref:`DMX_QUERYBUF` ioctl. - - -Description -=========== - -The :ref:`mmap() <dmx-mmap>` function asks to map ``length`` bytes starting at -``offset`` in the memory of the device specified by ``fd`` into the -application address space, preferably at address ``start``. This latter -address is a hint only, and is usually specified as 0. - -Suitable length and offset parameters are queried with the -:ref:`DMX_QUERYBUF` ioctl. Buffers must be allocated with the -:ref:`DMX_REQBUFS` ioctl before they can be queried. - -To unmap buffers the :ref:`munmap() <dmx-munmap>` function is used. - - -Return Value -============ - -On success :ref:`mmap() <dmx-mmap>` returns a pointer to the mapped buffer. On -error ``MAP_FAILED`` (-1) is returned, and the ``errno`` variable is set -appropriately. Possible error codes are: - -EBADF - ``fd`` is not a valid file descriptor. - -EACCES - ``fd`` is not open for reading and writing. - -EINVAL - The ``start`` or ``length`` or ``offset`` are not suitable. (E. g. - they are too large, or not aligned on a ``PAGESIZE`` boundary.) - - The ``flags`` or ``prot`` value is not supported. - - No buffers have been allocated with the - :ref:`DMX_REQBUFS` ioctl. - -ENOMEM - Not enough physical or virtual memory was available to complete the - request. diff --git a/Documentation/media/uapi/dvb/dmx-munmap.rst b/Documentation/media/uapi/dvb/dmx-munmap.rst deleted file mode 100644 index ef26b6f2b12b..000000000000 --- a/Documentation/media/uapi/dvb/dmx-munmap.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx-munmap: - -************ -DVB munmap() -************ - -Name -==== - -dmx-munmap - Unmap device memory - -.. warning:: This API is still experimental. - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - #include <sys/mman.h> - - -.. c:function:: int munmap( void *start, size_t length ) - :name: dmx-munmap - -Arguments -========= - -``start`` - Address of the mapped buffer as returned by the - :ref:`mmap() <dmx-mmap>` function. - -``length`` - Length of the mapped buffer. This must be the same value as given to - :ref:`mmap() <dmx-mmap>`. - - -Description -=========== - -Unmaps a previously with the :ref:`mmap() <dmx-mmap>` function mapped -buffer and frees it, if possible. - - -Return Value -============ - -On success :ref:`munmap() <dmx-munmap>` returns 0, on failure -1 and the -``errno`` variable is set appropriately: - -EINVAL - The ``start`` or ``length`` is incorrect, or no buffers have been - mapped yet. diff --git a/Documentation/media/uapi/dvb/dmx-qbuf.rst b/Documentation/media/uapi/dvb/dmx-qbuf.rst deleted file mode 100644 index 9dc845daa59d..000000000000 --- a/Documentation/media/uapi/dvb/dmx-qbuf.rst +++ /dev/null @@ -1,93 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_QBUF: - -************************* -ioctl DMX_QBUF, DMX_DQBUF -************************* - -Name -==== - -DMX_QBUF - DMX_DQBUF - Exchange a buffer with the driver - -.. warning:: this API is still experimental - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, DMX_QBUF, struct dmx_buffer *argp ) - :name: DMX_QBUF - -.. c:function:: int ioctl( int fd, DMX_DQBUF, struct dmx_buffer *argp ) - :name: DMX_DQBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <dmx_fopen>`. - -``argp`` - Pointer to struct :c:type:`dmx_buffer`. - - -Description -=========== - -Applications call the ``DMX_QBUF`` ioctl to enqueue an empty -(capturing) or filled (output) buffer in the driver's incoming queue. -The semantics depend on the selected I/O method. - -To enqueue a buffer applications set the ``index`` field. Valid index -numbers range from zero to the number of buffers allocated with -:ref:`DMX_REQBUFS` (struct :c:type:`dmx_requestbuffers` ``count``) minus -one. The contents of the struct :c:type:`dmx_buffer` returned -by a :ref:`DMX_QUERYBUF` ioctl will do as well. - -When ``DMX_QBUF`` is called with a pointer to this structure, it locks the -memory pages of the buffer in physical memory, so they cannot be swapped -out to disk. Buffers remain locked until dequeued, until the -the device is closed. - -Applications call the ``DMX_DQBUF`` ioctl to dequeue a filled -(capturing) buffer from the driver's outgoing queue. -They just set the ``index`` field with the buffer ID to be queued. -When ``DMX_DQBUF`` is called with a pointer to struct :c:type:`dmx_buffer`, -the driver fills the remaining fields or returns an error code. - -By default ``DMX_DQBUF`` blocks when no buffer is in the outgoing -queue. When the ``O_NONBLOCK`` flag was given to the -:ref:`open() <dmx_fopen>` function, ``DMX_DQBUF`` returns -immediately with an ``EAGAIN`` error code when no buffer is available. - -The struct :c:type:`dmx_buffer` structure is specified in -:ref:`buffer`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EAGAIN - Non-blocking I/O has been selected using ``O_NONBLOCK`` and no - buffer was in the outgoing queue. - -EINVAL - The ``index`` is out of bounds, or no buffers have been allocated yet. - -EIO - ``DMX_DQBUF`` failed due to an internal error. Can also indicate - temporary problems like signal loss or CRC errors. diff --git a/Documentation/media/uapi/dvb/dmx-querybuf.rst b/Documentation/media/uapi/dvb/dmx-querybuf.rst deleted file mode 100644 index 4cf36e821696..000000000000 --- a/Documentation/media/uapi/dvb/dmx-querybuf.rst +++ /dev/null @@ -1,72 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_QUERYBUF: - -****************** -ioctl DMX_QUERYBUF -****************** - -Name -==== - -DMX_QUERYBUF - Query the status of a buffer - -.. warning:: this API is still experimental - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, DMX_QUERYBUF, struct dvb_buffer *argp ) - :name: DMX_QUERYBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <dmx_fopen>`. - -``argp`` - Pointer to struct :c:type:`dvb_buffer`. - - -Description -=========== - -This ioctl is part of the mmap streaming I/O method. It can -be used to query the status of a buffer at any time after buffers have -been allocated with the :ref:`DMX_REQBUFS` ioctl. - -Applications set the ``index`` field. Valid index numbers range from zero -to the number of buffers allocated with :ref:`DMX_REQBUFS` -(struct :c:type:`dvb_requestbuffers` ``count``) minus one. - -After calling :ref:`DMX_QUERYBUF` with a pointer to this structure, -drivers return an error code or fill the rest of the structure. - -On success, the ``offset`` will contain the offset of the buffer from the -start of the device memory, the ``length`` field its size, and the -``bytesused`` the number of bytes occupied by data in the buffer (payload). - -Return Value -============ - -On success 0 is returned, the ``offset`` will contain the offset of the -buffer from the start of the device memory, the ``length`` field its size, -and the ``bytesused`` the number of bytes occupied by data in the buffer -(payload). - -On error it returns -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The ``index`` is out of bounds. diff --git a/Documentation/media/uapi/dvb/dmx-remove-pid.rst b/Documentation/media/uapi/dvb/dmx-remove-pid.rst deleted file mode 100644 index be992f44f306..000000000000 --- a/Documentation/media/uapi/dvb/dmx-remove-pid.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_REMOVE_PID: - -============== -DMX_REMOVE_PID -============== - -Name ----- - -DMX_REMOVE_PID - - -Synopsis --------- - -.. c:function:: int ioctl(fd, DMX_REMOVE_PID, __u16 *pid) - :name: DMX_REMOVE_PID - - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``pid`` - PID of the PES filter to be removed. - - -Description ------------ - -This ioctl call allows to remove a PID when multiple PIDs are set on a -transport stream filter, e. g. a filter previously set up with output -equal to :c:type:`DMX_OUT_TSDEMUX_TAP <dmx_output>`, created via either -:ref:`DMX_SET_PES_FILTER` or :ref:`DMX_ADD_PID`. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-reqbufs.rst b/Documentation/media/uapi/dvb/dmx-reqbufs.rst deleted file mode 100644 index b302785bf678..000000000000 --- a/Documentation/media/uapi/dvb/dmx-reqbufs.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_REQBUFS: - -***************** -ioctl DMX_REQBUFS -***************** - -Name -==== - -DMX_REQBUFS - Initiate Memory Mapping and/or DMA buffer I/O - -.. warning:: this API is still experimental - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, DMX_REQBUFS, struct dmx_requestbuffers *argp ) - :name: DMX_REQBUFS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <dmx_fopen>`. - -``argp`` - Pointer to struct :c:type:`dmx_requestbuffers`. - -Description -=========== - -This ioctl is used to initiate a memory mapped or DMABUF based demux I/O. - -Memory mapped buffers are located in device memory and must be allocated -with this ioctl before they can be mapped into the application's address -space. User buffers are allocated by applications themselves, and this -ioctl is merely used to switch the driver into user pointer I/O mode and -to setup some internal structures. Similarly, DMABUF buffers are -allocated by applications through a device driver, and this ioctl only -configures the driver into DMABUF I/O mode without performing any direct -allocation. - -To allocate device buffers applications initialize all fields of the -struct :c:type:`dmx_requestbuffers` structure. They set the ``count`` field -to the desired number of buffers, and ``size`` to the size of each -buffer. - -When the ioctl is called with a pointer to this structure, the driver will -attempt to allocate the requested number of buffers and it stores the actual -number allocated in the ``count`` field. The ``count`` can be smaller than the number requested, even zero, when the driver runs out of free memory. A larger -number is also possible when the driver requires more buffers to -function correctly. The actual allocated buffer size can is returned -at ``size``, and can be smaller than what's requested. - -When this I/O method is not supported, the ioctl returns an ``EOPNOTSUPP`` -error code. - -Applications can call :ref:`DMX_REQBUFS` again to change the number of -buffers, however this cannot succeed when any buffers are still mapped. -A ``count`` value of zero frees all buffers, after aborting or finishing -any DMA in progress. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EOPNOTSUPP - The the requested I/O method is not supported. diff --git a/Documentation/media/uapi/dvb/dmx-set-buffer-size.rst b/Documentation/media/uapi/dvb/dmx-set-buffer-size.rst deleted file mode 100644 index 2dee0fb11f62..000000000000 --- a/Documentation/media/uapi/dvb/dmx-set-buffer-size.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_SET_BUFFER_SIZE: - -=================== -DMX_SET_BUFFER_SIZE -=================== - -Name ----- - -DMX_SET_BUFFER_SIZE - - -Synopsis --------- - -.. c:function:: int ioctl( int fd, DMX_SET_BUFFER_SIZE, unsigned long size) - :name: DMX_SET_BUFFER_SIZE - - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``size`` - Unsigned long size - -Description ------------ - -This ioctl call is used to set the size of the circular buffer used for -filtered data. The default size is two maximum sized sections, i.e. if -this function is not called a buffer size of ``2 * 4096`` bytes will be -used. - - -Return Value ------------- - - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-set-filter.rst b/Documentation/media/uapi/dvb/dmx-set-filter.rst deleted file mode 100644 index 66afbb9f2fe4..000000000000 --- a/Documentation/media/uapi/dvb/dmx-set-filter.rst +++ /dev/null @@ -1,64 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_SET_FILTER: - -============== -DMX_SET_FILTER -============== - -Name ----- - -DMX_SET_FILTER - - -Synopsis --------- - -.. c:function:: int ioctl( int fd, DMX_SET_FILTER, struct dmx_sct_filter_params *params) - :name: DMX_SET_FILTER - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``params`` - - Pointer to structure containing filter parameters. - - -Description ------------ - -This ioctl call sets up a filter according to the filter and mask -parameters provided. A timeout may be defined stating number of seconds -to wait for a section to be loaded. A value of 0 means that no timeout -should be applied. Finally there is a flag field where it is possible to -state whether a section should be CRC-checked, whether the filter should -be a ”one-shot” filter, i.e. if the filtering operation should be -stopped after the first section is received, and whether the filtering -operation should be started immediately (without waiting for a -:ref:`DMX_START` ioctl call). If a filter was previously set-up, this -filter will be canceled, and the receive buffer will be flushed. - - -Return Value ------------- - - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-set-pes-filter.rst b/Documentation/media/uapi/dvb/dmx-set-pes-filter.rst deleted file mode 100644 index dae5ab7878e5..000000000000 --- a/Documentation/media/uapi/dvb/dmx-set-pes-filter.rst +++ /dev/null @@ -1,76 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_SET_PES_FILTER: - -================== -DMX_SET_PES_FILTER -================== - -Name ----- - -DMX_SET_PES_FILTER - - -Synopsis --------- - -.. c:function:: int ioctl( int fd, DMX_SET_PES_FILTER, struct dmx_pes_filter_params *params) - :name: DMX_SET_PES_FILTER - - -Arguments ---------- - - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -``params`` - Pointer to structure containing filter parameters. - - -Description ------------ - -This ioctl call sets up a PES filter according to the parameters -provided. By a PES filter is meant a filter that is based just on the -packet identifier (PID), i.e. no PES header or payload filtering -capability is supported. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - .. row 1 - - - ``EBUSY`` - - - This error code indicates that there are conflicting requests. - There are active filters filtering data from another input source. - Make sure that these filters are stopped before starting this - filter. - - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-start.rst b/Documentation/media/uapi/dvb/dmx-start.rst deleted file mode 100644 index 488289d02504..000000000000 --- a/Documentation/media/uapi/dvb/dmx-start.rst +++ /dev/null @@ -1,75 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_START: - -========= -DMX_START -========= - -Name ----- - -DMX_START - - -Synopsis --------- - -.. c:function:: int ioctl( int fd, DMX_START) - :name: DMX_START - - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -Description ------------ - -This ioctl call is used to start the actual filtering operation defined -via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER`. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EINVAL`` - - - Invalid argument, i.e. no filtering parameters provided via the - :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` ioctls. - - - .. row 2 - - - ``EBUSY`` - - - This error code indicates that there are conflicting requests. - There are active filters filtering data from another input source. - Make sure that these filters are stopped before starting this - filter. - - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx-stop.rst b/Documentation/media/uapi/dvb/dmx-stop.rst deleted file mode 100644 index 982384d12923..000000000000 --- a/Documentation/media/uapi/dvb/dmx-stop.rst +++ /dev/null @@ -1,52 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _DMX_STOP: - -======== -DMX_STOP -======== - -Name ----- - -DMX_STOP - - -Synopsis --------- - -.. c:function:: int ioctl( int fd, DMX_STOP) - :name: DMX_STOP - - -Arguments ---------- - -``fd`` - File descriptor returned by :c:func:`open() <dvb-dmx-open>`. - -Description ------------ - -This ioctl call is used to stop the actual filtering operation defined -via the ioctl calls :ref:`DMX_SET_FILTER` or :ref:`DMX_SET_PES_FILTER` and -started via the :ref:`DMX_START` command. - - -Return Value ------------- - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/dmx_fcalls.rst b/Documentation/media/uapi/dvb/dmx_fcalls.rst deleted file mode 100644 index 67312ab65f94..000000000000 --- a/Documentation/media/uapi/dvb/dmx_fcalls.rst +++ /dev/null @@ -1,37 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx_fcalls: - -******************** -Demux Function Calls -******************** - -.. toctree:: - :maxdepth: 1 - - dmx-fopen - dmx-fclose - dmx-fread - dmx-fwrite - dmx-mmap - dmx-munmap - dmx-start - dmx-stop - dmx-set-filter - dmx-set-pes-filter - dmx-set-buffer-size - dmx-get-stc - dmx-get-pes-pids - dmx-add-pid - dmx-remove-pid - dmx-reqbufs - dmx-querybuf - dmx-expbuf - dmx-qbuf diff --git a/Documentation/media/uapi/dvb/dmx_types.rst b/Documentation/media/uapi/dvb/dmx_types.rst deleted file mode 100644 index b5cf704199e5..000000000000 --- a/Documentation/media/uapi/dvb/dmx_types.rst +++ /dev/null @@ -1,16 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmx_types: - -**************** -Demux Data Types -**************** - -.. kernel-doc:: include/uapi/linux/dvb/dmx.h diff --git a/Documentation/media/uapi/dvb/dvb-fe-read-status.rst b/Documentation/media/uapi/dvb/dvb-fe-read-status.rst deleted file mode 100644 index 172783b75fb7..000000000000 --- a/Documentation/media/uapi/dvb/dvb-fe-read-status.rst +++ /dev/null @@ -1,32 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb-fe-read-status: - -*************************************** -Querying frontend status and statistics -*************************************** - -Once :ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` is called, the -frontend will run a kernel thread that will periodically check for the -tuner lock status and provide statistics about the quality of the -signal. - -The information about the frontend tuner locking status can be queried -using :ref:`FE_READ_STATUS`. - -Signal statistics are provided via -:ref:`FE_GET_PROPERTY`. - -.. note:: - - Most statistics require the demodulator to be fully locked - (e. g. with :c:type:`FE_HAS_LOCK <fe_status>` bit set). See - :ref:`Frontend statistics indicators <frontend-stat-properties>` for - more details. diff --git a/Documentation/media/uapi/dvb/dvb-frontend-event.rst b/Documentation/media/uapi/dvb/dvb-frontend-event.rst deleted file mode 100644 index ad4af66040c7..000000000000 --- a/Documentation/media/uapi/dvb/dvb-frontend-event.rst +++ /dev/null @@ -1,22 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. c:type:: dvb_frontend_event - -*************** -frontend events -*************** - - -.. code-block:: c - - struct dvb_frontend_event { - fe_status_t status; - struct dvb_frontend_parameters parameters; - }; diff --git a/Documentation/media/uapi/dvb/dvb-frontend-parameters.rst b/Documentation/media/uapi/dvb/dvb-frontend-parameters.rst deleted file mode 100644 index 67c2a316019f..000000000000 --- a/Documentation/media/uapi/dvb/dvb-frontend-parameters.rst +++ /dev/null @@ -1,126 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. c:type:: dvb_frontend_parameters - -******************* -frontend parameters -******************* - -The kind of parameters passed to the frontend device for tuning depend -on the kind of hardware you are using. - -The struct ``dvb_frontend_parameters`` uses a union with specific -per-system parameters. However, as newer delivery systems required more -data, the structure size weren't enough to fit, and just extending its -size would break the existing applications. So, those parameters were -replaced by the usage of -:ref:`FE_GET_PROPERTY/FE_SET_PROPERTY <FE_GET_PROPERTY>` -ioctl's. The new API is flexible enough to add new parameters to -existing delivery systems, and to add newer delivery systems. - -So, newer applications should use -:ref:`FE_GET_PROPERTY/FE_SET_PROPERTY <FE_GET_PROPERTY>` -instead, in order to be able to support the newer System Delivery like -DVB-S2, DVB-T2, DVB-C2, ISDB, etc. - -All kinds of parameters are combined as a union in the -``dvb_frontend_parameters`` structure: - - -.. code-block:: c - - struct dvb_frontend_parameters { - uint32_t frequency; /* (absolute) frequency in Hz for QAM/OFDM */ - /* intermediate frequency in kHz for QPSK */ - fe_spectral_inversion_t inversion; - union { - struct dvb_qpsk_parameters qpsk; - struct dvb_qam_parameters qam; - struct dvb_ofdm_parameters ofdm; - struct dvb_vsb_parameters vsb; - } u; - }; - -In the case of QPSK frontends the ``frequency`` field specifies the -intermediate frequency, i.e. the offset which is effectively added to -the local oscillator frequency (LOF) of the LNB. The intermediate -frequency has to be specified in units of kHz. For QAM and OFDM -frontends the ``frequency`` specifies the absolute frequency and is -given in Hz. - - -.. c:type:: dvb_qpsk_parameters - -QPSK parameters -=============== - -For satellite QPSK frontends you have to use the ``dvb_qpsk_parameters`` -structure: - - -.. code-block:: c - - struct dvb_qpsk_parameters { - uint32_t symbol_rate; /* symbol rate in Symbols per second */ - fe_code_rate_t fec_inner; /* forward error correction (see above) */ - }; - - -.. c:type:: dvb_qam_parameters - -QAM parameters -============== - -for cable QAM frontend you use the ``dvb_qam_parameters`` structure: - - -.. code-block:: c - - struct dvb_qam_parameters { - uint32_t symbol_rate; /* symbol rate in Symbols per second */ - fe_code_rate_t fec_inner; /* forward error correction (see above) */ - fe_modulation_t modulation; /* modulation type (see above) */ - }; - - -.. c:type:: dvb_vsb_parameters - -VSB parameters -============== - -ATSC frontends are supported by the ``dvb_vsb_parameters`` structure: - - -.. code-block:: c - - struct dvb_vsb_parameters { - fe_modulation_t modulation; /* modulation type (see above) */ - }; - - -.. c:type:: dvb_ofdm_parameters - -OFDM parameters -=============== - -DVB-T frontends are supported by the ``dvb_ofdm_parameters`` structure: - - -.. code-block:: c - - struct dvb_ofdm_parameters { - fe_bandwidth_t bandwidth; - fe_code_rate_t code_rate_HP; /* high priority stream code rate */ - fe_code_rate_t code_rate_LP; /* low priority stream code rate */ - fe_modulation_t constellation; /* modulation type (see above) */ - fe_transmit_mode_t transmission_mode; - fe_guard_interval_t guard_interval; - fe_hierarchy_t hierarchy_information; - }; diff --git a/Documentation/media/uapi/dvb/dvbapi.rst b/Documentation/media/uapi/dvb/dvbapi.rst deleted file mode 100644 index 0fcc01f182f9..000000000000 --- a/Documentation/media/uapi/dvb/dvbapi.rst +++ /dev/null @@ -1,126 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. include:: <isonum.txt> - -.. _dvbapi: - -######################## -Part II - Digital TV API -######################## - -.. note:: - - This API is also known as Linux **DVB API**. - - It it was originally written to support the European digital TV - standard (DVB), and later extended to support all digital TV standards. - - In order to avoid confusion, within this document, it was opted to refer to - it, and to associated hardware as **Digital TV**. - - The word **DVB** is reserved to be used for: - - - the Digital TV API version - (e. g. DVB API version 3 or DVB API version 5); - - digital TV data types (enums, structs, defines, etc); - - digital TV device nodes (``/dev/dvb/...``); - - the European DVB standard. - -**Version 5.10** - -.. only:: html - - .. class:: toc-title - - Table of Contents - -.. toctree:: - :maxdepth: 5 - :numbered: - - intro - frontend - demux - ca - net - legacy_dvb_apis - examples - headers - - -********************** -Revision and Copyright -********************** - -Authors: - -- J. K. Metzler, Ralph <rjkm@metzlerbros.de> - - - Original author of the Digital TV API documentation. - -- O. C. Metzler, Marcus <rjkm@metzlerbros.de> - - - Original author of the Digital TV API documentation. - -- Carvalho Chehab, Mauro <mchehab+samsung@kernel.org> - - - Ported document to Docbook XML, addition of DVBv5 API, documentation gaps fix. - -**Copyright** |copy| 2002-2003 : Convergence GmbH - -**Copyright** |copy| 2009-2017 : Mauro Carvalho Chehab - -**************** -Revision History -**************** - -:revision: 2.2.0 / 2017-09-01 (*mcc*) - -Most gaps between the uAPI document and the Kernel implementation -got fixed for the non-legacy API. - -:revision: 2.1.0 / 2015-05-29 (*mcc*) - -DocBook improvements and cleanups, in order to document the system calls -on a more standard way and provide more description about the current -Digital TV API. - -:revision: 2.0.4 / 2011-05-06 (*mcc*) - -Add more information about DVBv5 API, better describing the frontend -GET/SET props ioctl's. - - -:revision: 2.0.3 / 2010-07-03 (*mcc*) - -Add some frontend capabilities flags, present on kernel, but missing at -the specs. - - -:revision: 2.0.2 / 2009-10-25 (*mcc*) - -documents FE_SET_FRONTEND_TUNE_MODE and -FE_DISHETWORK_SEND_LEGACY_CMD ioctls. - - -:revision: 2.0.1 / 2009-09-16 (*mcc*) - -Added ISDB-T test originally written by Patrick Boettcher - - -:revision: 2.0.0 / 2009-09-06 (*mcc*) - -Conversion from LaTex to DocBook XML. The contents is the same as the -original LaTex version. - - -:revision: 1.0.0 / 2003-07-24 (*rjkm*) - -Initial revision on LaTEX. diff --git a/Documentation/media/uapi/dvb/dvbproperty.rst b/Documentation/media/uapi/dvb/dvbproperty.rst deleted file mode 100644 index 0c4f5598f2be..000000000000 --- a/Documentation/media/uapi/dvb/dvbproperty.rst +++ /dev/null @@ -1,133 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend-properties: - -************** -Property types -************** - -Tuning into a Digital TV physical channel and starting decoding it -requires changing a set of parameters, in order to control the tuner, -the demodulator, the Linear Low-noise Amplifier (LNA) and to set the -antenna subsystem via Satellite Equipment Control - SEC (on satellite -systems). The actual parameters are specific to each particular digital -TV standards, and may change as the digital TV specs evolves. - -In the past (up to DVB API version 3 - DVBv3), the strategy used was to have a -union with the parameters needed to tune for DVB-S, DVB-C, DVB-T and -ATSC delivery systems grouped there. The problem is that, as the second -generation standards appeared, the size of such union was not big -enough to group the structs that would be required for those new -standards. Also, extending it would break userspace. - -So, the legacy union/struct based approach was deprecated, in favor -of a properties set approach. On such approach, -:ref:`FE_GET_PROPERTY and FE_SET_PROPERTY <FE_GET_PROPERTY>` are used -to setup the frontend and read its status. - -The actual action is determined by a set of dtv_property cmd/data pairs. -With one single ioctl, is possible to get/set up to 64 properties. - -This section describes the new and recommended way to set the frontend, -with supports all digital TV delivery systems. - -.. note:: - - 1. On Linux DVB API version 3, setting a frontend was done via - struct :c:type:`dvb_frontend_parameters`. - - 2. Don't use DVB API version 3 calls on hardware with supports - newer standards. Such API provides no support or a very limited - support to new standards and/or new hardware. - - 3. Nowadays, most frontends support multiple delivery systems. - Only with DVB API version 5 calls it is possible to switch between - the multiple delivery systems supported by a frontend. - - 4. DVB API version 5 is also called *S2API*, as the first - new standard added to it was DVB-S2. - -**Example**: in order to set the hardware to tune into a DVB-C channel -at 651 kHz, modulated with 256-QAM, FEC 3/4 and symbol rate of 5.217 -Mbauds, those properties should be sent to -:ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` ioctl: - - :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` = SYS_DVBC_ANNEX_A - - :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` = 651000000 - - :ref:`DTV_MODULATION <DTV-MODULATION>` = QAM_256 - - :ref:`DTV_INVERSION <DTV-INVERSION>` = INVERSION_AUTO - - :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` = 5217000 - - :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` = FEC_3_4 - - :ref:`DTV_TUNE <DTV-TUNE>` - -The code that would that would do the above is show in -:ref:`dtv-prop-example`. - -.. code-block:: c - :caption: Example: Setting digital TV frontend properties - :name: dtv-prop-example - - #include <stdio.h> - #include <fcntl.h> - #include <sys/ioctl.h> - #include <linux/dvb/frontend.h> - - static struct dtv_property props[] = { - { .cmd = DTV_DELIVERY_SYSTEM, .u.data = SYS_DVBC_ANNEX_A }, - { .cmd = DTV_FREQUENCY, .u.data = 651000000 }, - { .cmd = DTV_MODULATION, .u.data = QAM_256 }, - { .cmd = DTV_INVERSION, .u.data = INVERSION_AUTO }, - { .cmd = DTV_SYMBOL_RATE, .u.data = 5217000 }, - { .cmd = DTV_INNER_FEC, .u.data = FEC_3_4 }, - { .cmd = DTV_TUNE } - }; - - static struct dtv_properties dtv_prop = { - .num = 6, .props = props - }; - - int main(void) - { - int fd = open("/dev/dvb/adapter0/frontend0", O_RDWR); - - if (!fd) { - perror ("open"); - return -1; - } - if (ioctl(fd, FE_SET_PROPERTY, &dtv_prop) == -1) { - perror("ioctl"); - return -1; - } - printf("Frontend set\\n"); - return 0; - } - -.. attention:: While it is possible to directly call the Kernel code like the - above example, it is strongly recommended to use - `libdvbv5 <https://linuxtv.org/docs/libdvbv5/index.html>`__, as it - provides abstraction to work with the supported digital TV standards and - provides methods for usual operations like program scanning and to - read/write channel descriptor files. - -.. toctree:: - :maxdepth: 1 - - fe_property_parameters - frontend-stat-properties - frontend-property-terrestrial-systems - frontend-property-cable-systems - frontend-property-satellite-systems - frontend-header diff --git a/Documentation/media/uapi/dvb/dvbstb.svg b/Documentation/media/uapi/dvb/dvbstb.svg deleted file mode 100644 index c7672148d6ff..000000000000 --- a/Documentation/media/uapi/dvb/dvbstb.svg +++ /dev/null @@ -1,43 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!-- - This file is dual-licensed: you can use it either under the terms - of the GPL 2.0 or the GFDL 1.1+ license, at your option. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_examples: - -******** -Examples -******** - -In the past, we used to have a set of examples here. However, those -examples got out of date and doesn't even compile nowadays. - -Also, nowadays, the best is to use the libdvbv5 DVB API nowadays, -with is fully documented. - -Please refer to the `libdvbv5 <https://linuxtv.org/docs/libdvbv5/index.html>`__ -for updated/recommended examples. diff --git a/Documentation/media/uapi/dvb/fe-bandwidth-t.rst b/Documentation/media/uapi/dvb/fe-bandwidth-t.rst deleted file mode 100644 index c3d7837b5f87..000000000000 --- a/Documentation/media/uapi/dvb/fe-bandwidth-t.rst +++ /dev/null @@ -1,81 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -****************** -Frontend bandwidth -****************** - -.. c:type:: fe_bandwidth - -.. flat-table:: enum fe_bandwidth - :header-rows: 1 - :stub-columns: 0 - - - - .. row 1 - - - ID - - - Description - - - .. row 2 - - - .. _BANDWIDTH-AUTO: - - ``BANDWIDTH_AUTO`` - - - Autodetect bandwidth (if supported) - - - .. row 3 - - - .. _BANDWIDTH-1-712-MHZ: - - ``BANDWIDTH_1_712_MHZ`` - - - 1.712 MHz - - - .. row 4 - - - .. _BANDWIDTH-5-MHZ: - - ``BANDWIDTH_5_MHZ`` - - - 5 MHz - - - .. row 5 - - - .. _BANDWIDTH-6-MHZ: - - ``BANDWIDTH_6_MHZ`` - - - 6 MHz - - - .. row 6 - - - .. _BANDWIDTH-7-MHZ: - - ``BANDWIDTH_7_MHZ`` - - - 7 MHz - - - .. row 7 - - - .. _BANDWIDTH-8-MHZ: - - ``BANDWIDTH_8_MHZ`` - - - 8 MHz - - - .. row 8 - - - .. _BANDWIDTH-10-MHZ: - - ``BANDWIDTH_10_MHZ`` - - - 10 MHz diff --git a/Documentation/media/uapi/dvb/fe-diseqc-recv-slave-reply.rst b/Documentation/media/uapi/dvb/fe-diseqc-recv-slave-reply.rst deleted file mode 100644 index 88fd2186ca4d..000000000000 --- a/Documentation/media/uapi/dvb/fe-diseqc-recv-slave-reply.rst +++ /dev/null @@ -1,55 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_DISEQC_RECV_SLAVE_REPLY: - -******************************** -ioctl FE_DISEQC_RECV_SLAVE_REPLY -******************************** - -Name -==== - -FE_DISEQC_RECV_SLAVE_REPLY - Receives reply from a DiSEqC 2.0 command - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_DISEQC_RECV_SLAVE_REPLY, struct dvb_diseqc_slave_reply *argp ) - :name: FE_DISEQC_RECV_SLAVE_REPLY - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``argp`` - pointer to struct :c:type:`dvb_diseqc_slave_reply`. - - -Description -=========== - -Receives reply from a DiSEqC 2.0 command. - -The received message is stored at the buffer pointed by ``argp``. - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-diseqc-reset-overload.rst b/Documentation/media/uapi/dvb/fe-diseqc-reset-overload.rst deleted file mode 100644 index 92929c2e75db..000000000000 --- a/Documentation/media/uapi/dvb/fe-diseqc-reset-overload.rst +++ /dev/null @@ -1,53 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_DISEQC_RESET_OVERLOAD: - -****************************** -ioctl FE_DISEQC_RESET_OVERLOAD -****************************** - -Name -==== - -FE_DISEQC_RESET_OVERLOAD - Restores the power to the antenna subsystem, if it was powered off due - to power overload. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_DISEQC_RESET_OVERLOAD, NULL ) - :name: FE_DISEQC_RESET_OVERLOAD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -Description -=========== - -If the bus has been automatically powered off due to power overload, -this ioctl call restores the power to the bus. The call requires -read/write access to the device. This call has no effect if the device -is manually powered off. Not all Digital TV adapters support this ioctl. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-diseqc-send-burst.rst b/Documentation/media/uapi/dvb/fe-diseqc-send-burst.rst deleted file mode 100644 index 8af872d306aa..000000000000 --- a/Documentation/media/uapi/dvb/fe-diseqc-send-burst.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_DISEQC_SEND_BURST: - -************************** -ioctl FE_DISEQC_SEND_BURST -************************** - -Name -==== - -FE_DISEQC_SEND_BURST - Sends a 22KHz tone burst for 2x1 mini DiSEqC satellite selection. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_DISEQC_SEND_BURST, enum fe_sec_mini_cmd tone ) - :name: FE_DISEQC_SEND_BURST - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``tone`` - An integer enumered value described at :c:type:`fe_sec_mini_cmd`. - - -Description -=========== - -This ioctl is used to set the generation of a 22kHz tone burst for mini -DiSEqC satellite selection for 2x1 switches. This call requires -read/write permissions. - -It provides support for what's specified at -`Digital Satellite Equipment Control (DiSEqC) - Simple "ToneBurst" Detection Circuit specification. <http://www.eutelsat.com/files/contributed/satellites/pdf/Diseqc/associated%20docs/simple_tone_burst_detec.pdf>`__ - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-diseqc-send-master-cmd.rst b/Documentation/media/uapi/dvb/fe-diseqc-send-master-cmd.rst deleted file mode 100644 index 30a48114153c..000000000000 --- a/Documentation/media/uapi/dvb/fe-diseqc-send-master-cmd.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_DISEQC_SEND_MASTER_CMD: - -******************************* -ioctl FE_DISEQC_SEND_MASTER_CMD -******************************* - -Name -==== - -FE_DISEQC_SEND_MASTER_CMD - Sends a DiSEqC command - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_DISEQC_SEND_MASTER_CMD, struct dvb_diseqc_master_cmd *argp ) - :name: FE_DISEQC_SEND_MASTER_CMD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``argp`` - pointer to struct - :c:type:`dvb_diseqc_master_cmd` - - -Description -=========== - -Sends the DiSEqC command pointed by :c:type:`dvb_diseqc_master_cmd` -to the antenna subsystem. - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - diff --git a/Documentation/media/uapi/dvb/fe-dishnetwork-send-legacy-cmd.rst b/Documentation/media/uapi/dvb/fe-dishnetwork-send-legacy-cmd.rst deleted file mode 100644 index 13811289971b..000000000000 --- a/Documentation/media/uapi/dvb/fe-dishnetwork-send-legacy-cmd.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_DISHNETWORK_SEND_LEGACY_CMD: - -****************************** -FE_DISHNETWORK_SEND_LEGACY_CMD -****************************** - -Name -==== - -FE_DISHNETWORK_SEND_LEGACY_CMD - - -Synopsis -======== - -.. c:function:: int ioctl(int fd, FE_DISHNETWORK_SEND_LEGACY_CMD, unsigned long cmd) - :name: FE_DISHNETWORK_SEND_LEGACY_CMD - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``cmd`` - Sends the specified raw cmd to the dish via DISEqC. - - -Description -=========== - -.. warning:: - This is a very obscure legacy command, used only at stv0299 - driver. Should not be used on newer drivers. - -It provides a non-standard method for selecting Diseqc voltage on the -frontend, for Dish Network legacy switches. - -As support for this ioctl were added in 2004, this means that such -dishes were already legacy in 2004. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst b/Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst deleted file mode 100644 index 32b7d140d80b..000000000000 --- a/Documentation/media/uapi/dvb/fe-enable-high-lnb-voltage.rst +++ /dev/null @@ -1,61 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_ENABLE_HIGH_LNB_VOLTAGE: - -******************************** -ioctl FE_ENABLE_HIGH_LNB_VOLTAGE -******************************** - -Name -==== - -FE_ENABLE_HIGH_LNB_VOLTAGE - Select output DC level between normal LNBf voltages or higher LNBf - voltages. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_ENABLE_HIGH_LNB_VOLTAGE, unsigned int high ) - :name: FE_ENABLE_HIGH_LNB_VOLTAGE - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``high`` - Valid flags: - - - 0 - normal 13V and 18V. - - - >0 - enables slightly higher voltages instead of 13/18V, in order - to compensate for long antenna cables. - - -Description -=========== - -Select output DC level between normal LNBf voltages or higher LNBf -voltages between 0 (normal) or a value grater than 0 for higher -voltages. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-get-event.rst b/Documentation/media/uapi/dvb/fe-get-event.rst deleted file mode 100644 index 2573d5b9b636..000000000000 --- a/Documentation/media/uapi/dvb/fe-get-event.rst +++ /dev/null @@ -1,78 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_GET_EVENT: - -************ -FE_GET_EVENT -************ - -Name -==== - -FE_GET_EVENT - -.. attention:: This ioctl is deprecated. - - -Synopsis -======== - -.. c:function:: int ioctl(int fd, FE_GET_EVENT, struct dvb_frontend_event *ev) - :name: FE_GET_EVENT - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``ev`` - Points to the location where the event, if any, is to be stored. - - -Description -=========== - -This ioctl call returns a frontend event if available. If an event is -not available, the behavior depends on whether the device is in blocking -or non-blocking mode. In the latter case, the call fails immediately -with errno set to ``EWOULDBLOCK``. In the former case, the call blocks until -an event becomes available. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EWOULDBLOCK`` - - - There is no event pending, and the device is in non-blocking mode. - - - .. row 2 - - - ``EOVERFLOW`` - - - Overflow in event queue - one or more events were lost. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-get-frontend.rst b/Documentation/media/uapi/dvb/fe-get-frontend.rst deleted file mode 100644 index 6cd5250d1832..000000000000 --- a/Documentation/media/uapi/dvb/fe-get-frontend.rst +++ /dev/null @@ -1,69 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_GET_FRONTEND: - -*************** -FE_GET_FRONTEND -*************** - -Name -==== - -FE_GET_FRONTEND - -.. attention:: This ioctl is deprecated. - - -Synopsis -======== - -.. c:function:: int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p) - :name: FE_GET_FRONTEND - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - - -``p`` - Points to parameters for tuning operation. - - -Description -=========== - -This ioctl call queries the currently effective frontend parameters. For -this command, read-only access to the device is sufficient. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EINVAL`` - - - Maximum supported symbol rate reached. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-get-info.rst b/Documentation/media/uapi/dvb/fe-get-info.rst deleted file mode 100644 index 551e68b11528..000000000000 --- a/Documentation/media/uapi/dvb/fe-get-info.rst +++ /dev/null @@ -1,70 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_GET_INFO: - -***************** -ioctl FE_GET_INFO -***************** - -Name -==== - -FE_GET_INFO - Query Digital TV frontend capabilities and returns information -about the - front-end. This call only requires read-only access to the device. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_GET_INFO, struct dvb_frontend_info *argp ) - :name: FE_GET_INFO - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``argp`` - pointer to struct struct - :c:type:`dvb_frontend_info` - - -Description -=========== - -All Digital TV frontend devices support the :ref:`FE_GET_INFO` ioctl. It is -used to identify kernel devices compatible with this specification and to -obtain information about driver and hardware capabilities. The ioctl -takes a pointer to dvb_frontend_info which is filled by the driver. -When the driver is not compatible with this specification the ioctl -returns an error. - - -frontend capabilities -===================== - -Capabilities describe what a frontend can do. Some capabilities are -supported only on some specific frontend types. - -The frontend capabilities are described at :c:type:`fe_caps`. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-get-property.rst b/Documentation/media/uapi/dvb/fe-get-property.rst deleted file mode 100644 index 99386c7461b3..000000000000 --- a/Documentation/media/uapi/dvb/fe-get-property.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_GET_PROPERTY: - -************************************** -ioctl FE_SET_PROPERTY, FE_GET_PROPERTY -************************************** - -Name -==== - -FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_GET_PROPERTY, struct dtv_properties *argp ) - :name: FE_GET_PROPERTY - -.. c:function:: int ioctl( int fd, FE_SET_PROPERTY, struct dtv_properties *argp ) - :name: FE_SET_PROPERTY - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``argp`` - Pointer to struct :c:type:`dtv_properties`. - - -Description -=========== - -All Digital TV frontend devices support the ``FE_SET_PROPERTY`` and -``FE_GET_PROPERTY`` ioctls. The supported properties and statistics -depends on the delivery system and on the device: - -- ``FE_SET_PROPERTY:`` - - - This ioctl is used to set one or more frontend properties. - - - This is the basic command to request the frontend to tune into - some frequency and to start decoding the digital TV signal. - - - This call requires read/write access to the device. - -.. note:: - - At return, the values aren't updated to reflect the actual - parameters used. If the actual parameters are needed, an explicit - call to ``FE_GET_PROPERTY`` is needed. - -- ``FE_GET_PROPERTY:`` - - - This ioctl is used to get properties and statistics from the - frontend. - - - No properties are changed, and statistics aren't reset. - - - This call only requires read-only access to the device. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-read-ber.rst b/Documentation/media/uapi/dvb/fe-read-ber.rst deleted file mode 100644 index e579d648687e..000000000000 --- a/Documentation/media/uapi/dvb/fe-read-ber.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_READ_BER: - -*********** -FE_READ_BER -*********** - -Name -==== - -FE_READ_BER - -.. attention:: This ioctl is deprecated. - -Synopsis -======== - -.. c:function:: int ioctl(int fd, FE_READ_BER, uint32_t *ber) - :name: FE_READ_BER - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``ber`` - The bit error rate is stored into \*ber. - - -Description -=========== - -This ioctl call returns the bit error rate for the signal currently -received/demodulated by the front-end. For this command, read-only -access to the device is sufficient. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-read-signal-strength.rst b/Documentation/media/uapi/dvb/fe-read-signal-strength.rst deleted file mode 100644 index 0a0c0c2ff207..000000000000 --- a/Documentation/media/uapi/dvb/fe-read-signal-strength.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_READ_SIGNAL_STRENGTH: - -*********************** -FE_READ_SIGNAL_STRENGTH -*********************** - -Name -==== - -FE_READ_SIGNAL_STRENGTH - -.. attention:: This ioctl is deprecated. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_READ_SIGNAL_STRENGTH, uint16_t *strength) - :name: FE_READ_SIGNAL_STRENGTH - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``strength`` - The signal strength value is stored into \*strength. - - -Description -=========== - -This ioctl call returns the signal strength value for the signal -currently received by the front-end. For this command, read-only access -to the device is sufficient. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-read-snr.rst b/Documentation/media/uapi/dvb/fe-read-snr.rst deleted file mode 100644 index 2a7a0d8f1fd5..000000000000 --- a/Documentation/media/uapi/dvb/fe-read-snr.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_READ_SNR: - -*********** -FE_READ_SNR -*********** - -Name -==== - -FE_READ_SNR - -.. attention:: This ioctl is deprecated. - -Synopsis -======== - -.. c:function:: int ioctl(int fd, FE_READ_SNR, int16_t *snr) - :name: FE_READ_SNR - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``snr`` - The signal-to-noise ratio is stored into \*snr. - - -Description -=========== - -This ioctl call returns the signal-to-noise ratio for the signal -currently received by the front-end. For this command, read-only access -to the device is sufficient. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-read-status.rst b/Documentation/media/uapi/dvb/fe-read-status.rst deleted file mode 100644 index 0dfc9fdf568f..000000000000 --- a/Documentation/media/uapi/dvb/fe-read-status.rst +++ /dev/null @@ -1,72 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_READ_STATUS: - -******************** -ioctl FE_READ_STATUS -******************** - -Name -==== - -FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_READ_STATUS, unsigned int *status ) - :name: FE_READ_STATUS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``status`` - pointer to a bitmask integer filled with the values defined by enum - :c:type:`fe_status`. - - -Description -=========== - -All Digital TV frontend devices support the ``FE_READ_STATUS`` ioctl. It is -used to check about the locking status of the frontend after being -tuned. The ioctl takes a pointer to an integer where the status will be -written. - -.. note:: - - The size of status is actually sizeof(enum fe_status), with - varies according with the architecture. This needs to be fixed in the - future. - - -int fe_status -============= - -The fe_status parameter is used to indicate the current state and/or -state changes of the frontend hardware. It is produced using the enum -:c:type:`fe_status` values on a bitmask - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-read-uncorrected-blocks.rst b/Documentation/media/uapi/dvb/fe-read-uncorrected-blocks.rst deleted file mode 100644 index 19c532f750aa..000000000000 --- a/Documentation/media/uapi/dvb/fe-read-uncorrected-blocks.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_READ_UNCORRECTED_BLOCKS: - -************************** -FE_READ_UNCORRECTED_BLOCKS -************************** - -Name -==== - -FE_READ_UNCORRECTED_BLOCKS - -.. attention:: This ioctl is deprecated. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_READ_UNCORRECTED_BLOCKS, uint32_t *ublocks) - :name: FE_READ_UNCORRECTED_BLOCKS - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``ublocks`` - The total number of uncorrected blocks seen by the driver so far. - - -Description -=========== - -This ioctl call returns the number of uncorrected blocks detected by the -device driver during its lifetime. For meaningful measurements, the -increment in block count during a specific time interval should be -calculated. For this command, read-only access to the device is -sufficient. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-set-frontend-tune-mode.rst b/Documentation/media/uapi/dvb/fe-set-frontend-tune-mode.rst deleted file mode 100644 index 36e8913170e1..000000000000 --- a/Documentation/media/uapi/dvb/fe-set-frontend-tune-mode.rst +++ /dev/null @@ -1,64 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_SET_FRONTEND_TUNE_MODE: - -******************************* -ioctl FE_SET_FRONTEND_TUNE_MODE -******************************* - -Name -==== - -FE_SET_FRONTEND_TUNE_MODE - Allow setting tuner mode flags to the frontend. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_SET_FRONTEND_TUNE_MODE, unsigned int flags ) - :name: FE_SET_FRONTEND_TUNE_MODE - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``flags`` - Valid flags: - - - 0 - normal tune mode - - - ``FE_TUNE_MODE_ONESHOT`` - When set, this flag will disable any - zigzagging or other "normal" tuning behaviour. Additionally, - there will be no automatic monitoring of the lock status, and - hence no frontend events will be generated. If a frontend device - is closed, this flag will be automatically turned off when the - device is reopened read-write. - - -Description -=========== - -Allow setting tuner mode flags to the frontend, between 0 (normal) or -``FE_TUNE_MODE_ONESHOT`` mode - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-set-frontend.rst b/Documentation/media/uapi/dvb/fe-set-frontend.rst deleted file mode 100644 index 23caae2588d2..000000000000 --- a/Documentation/media/uapi/dvb/fe-set-frontend.rst +++ /dev/null @@ -1,78 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_SET_FRONTEND: - -*************** -FE_SET_FRONTEND -*************** - -.. attention:: This ioctl is deprecated. - -Name -==== - -FE_SET_FRONTEND - - -Synopsis -======== - -.. c:function:: int ioctl(int fd, FE_SET_FRONTEND, struct dvb_frontend_parameters *p) - :name: FE_SET_FRONTEND - - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - -``p`` - Points to parameters for tuning operation. - - -Description -=========== - -This ioctl call starts a tuning operation using specified parameters. -The result of this call will be successful if the parameters were valid -and the tuning could be initiated. The result of the tuning operation in -itself, however, will arrive asynchronously as an event (see -documentation for :ref:`FE_GET_EVENT` and -FrontendEvent.) If a new :ref:`FE_SET_FRONTEND` -operation is initiated before the previous one was completed, the -previous operation will be aborted in favor of the new one. This command -requires read/write access to the device. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - .. row 1 - - - ``EINVAL`` - - - Maximum supported symbol rate reached. - - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-set-tone.rst b/Documentation/media/uapi/dvb/fe-set-tone.rst deleted file mode 100644 index fb605e8c9fc4..000000000000 --- a/Documentation/media/uapi/dvb/fe-set-tone.rst +++ /dev/null @@ -1,65 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_SET_TONE: - -***************** -ioctl FE_SET_TONE -***************** - -Name -==== - -FE_SET_TONE - Sets/resets the generation of the continuous 22kHz tone. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_SET_TONE, enum fe_sec_tone_mode tone ) - :name: FE_SET_TONE - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``tone`` - an integer enumered value described at :c:type:`fe_sec_tone_mode` - - -Description -=========== - -This ioctl is used to set the generation of the continuous 22kHz tone. -This call requires read/write permissions. - -Usually, satellite antenna subsystems require that the digital TV device -to send a 22kHz tone in order to select between high/low band on some -dual-band LNBf. It is also used to send signals to DiSEqC equipment, but -this is done using the DiSEqC ioctls. - -.. attention:: If more than one device is connected to the same antenna, - setting a tone may interfere on other devices, as they may lose the - capability of selecting the band. So, it is recommended that applications - would change to SEC_TONE_OFF when the device is not used. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-set-voltage.rst b/Documentation/media/uapi/dvb/fe-set-voltage.rst deleted file mode 100644 index c81a8e6a59aa..000000000000 --- a/Documentation/media/uapi/dvb/fe-set-voltage.rst +++ /dev/null @@ -1,69 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _FE_SET_VOLTAGE: - -******************** -ioctl FE_SET_VOLTAGE -******************** - -Name -==== - -FE_SET_VOLTAGE - Allow setting the DC level sent to the antenna subsystem. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, FE_SET_VOLTAGE, enum fe_sec_voltage voltage ) - :name: FE_SET_VOLTAGE - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``voltage`` - an integer enumered value described at :c:type:`fe_sec_voltage` - - -Description -=========== - -This ioctl allows to set the DC voltage level sent through the antenna -cable to 13V, 18V or off. - -Usually, a satellite antenna subsystems require that the digital TV -device to send a DC voltage to feed power to the LNBf. Depending on the -LNBf type, the polarization or the intermediate frequency (IF) of the -LNBf can controlled by the voltage level. Other devices (for example, -the ones that implement DISEqC and multipoint LNBf's don't need to -control the voltage level, provided that either 13V or 18V is sent to -power up the LNBf. - -.. attention:: if more than one device is connected to the same antenna, - setting a voltage level may interfere on other devices, as they may lose - the capability of setting polarization or IF. So, on those cases, setting - the voltage to SEC_VOLTAGE_OFF while the device is not is used is - recommended. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/fe-type-t.rst b/Documentation/media/uapi/dvb/fe-type-t.rst deleted file mode 100644 index 9720d2f7ba35..000000000000 --- a/Documentation/media/uapi/dvb/fe-type-t.rst +++ /dev/null @@ -1,98 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -************* -Frontend type -************* - -For historical reasons, frontend types are named by the type of -modulation used in transmission. The fontend types are given by -fe_type_t type, defined as: - - -.. c:type:: fe_type - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: Frontend types - :header-rows: 1 - :stub-columns: 0 - :widths: 3 1 4 - - - - .. row 1 - - - fe_type - - - Description - - - :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` equivalent - type - - - .. row 2 - - - .. _FE-QPSK: - - ``FE_QPSK`` - - - For DVB-S standard - - - ``SYS_DVBS`` - - - .. row 3 - - - .. _FE-QAM: - - ``FE_QAM`` - - - For DVB-C annex A standard - - - ``SYS_DVBC_ANNEX_A`` - - - .. row 4 - - - .. _FE-OFDM: - - ``FE_OFDM`` - - - For DVB-T standard - - - ``SYS_DVBT`` - - - .. row 5 - - - .. _FE-ATSC: - - ``FE_ATSC`` - - - For ATSC standard (terrestrial) or for DVB-C Annex B (cable) used - in US. - - - ``SYS_ATSC`` (terrestrial) or ``SYS_DVBC_ANNEX_B`` (cable) - - -Newer formats like DVB-S2, ISDB-T, ISDB-S and DVB-T2 are not described -at the above, as they're supported via the new -:ref:`FE_GET_PROPERTY/FE_GET_SET_PROPERTY <FE_GET_PROPERTY>` -ioctl's, using the :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` -parameter. - -In the old days, struct :c:type:`dvb_frontend_info` -used to contain ``fe_type_t`` field to indicate the delivery systems, -filled with either ``FE_QPSK, FE_QAM, FE_OFDM`` or ``FE_ATSC``. While this -is still filled to keep backward compatibility, the usage of this field -is deprecated, as it can report just one delivery system, but some -devices support multiple delivery systems. Please use -:ref:`DTV_ENUM_DELSYS <DTV-ENUM-DELSYS>` instead. - -On devices that support multiple delivery systems, struct -:c:type:`dvb_frontend_info`::``fe_type_t`` is -filled with the currently standard, as selected by the last call to -:ref:`FE_SET_PROPERTY <FE_GET_PROPERTY>` using the -:ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` property. diff --git a/Documentation/media/uapi/dvb/fe_property_parameters.rst b/Documentation/media/uapi/dvb/fe_property_parameters.rst deleted file mode 100644 index 2fd2954d8dae..000000000000 --- a/Documentation/media/uapi/dvb/fe_property_parameters.rst +++ /dev/null @@ -1,1014 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _fe_property_parameters: - -****************************** -Digital TV property parameters -****************************** - -There are several different Digital TV parameters that can be used by -:ref:`FE_SET_PROPERTY and FE_GET_PROPERTY ioctls<FE_GET_PROPERTY>`. -This section describes each of them. Please notice, however, that only -a subset of them are needed to setup a frontend. - - -.. _DTV-UNDEFINED: - -DTV_UNDEFINED -============= - -Used internally. A GET/SET operation for it won't change or return -anything. - - -.. _DTV-TUNE: - -DTV_TUNE -======== - -Interpret the cache of data, build either a traditional frontend -tunerequest so we can pass validation in the ``FE_SET_FRONTEND`` ioctl. - - -.. _DTV-CLEAR: - -DTV_CLEAR -========= - -Reset a cache of data specific to the frontend here. This does not -effect hardware. - - -.. _DTV-FREQUENCY: - -DTV_FREQUENCY -============= - -Frequency of the digital TV transponder/channel. - -.. note:: - - #. For satellite delivery systems, the frequency is in kHz. - - #. For cable and terrestrial delivery systems, the frequency is in - Hz. - - #. On most delivery systems, the frequency is the center frequency - of the transponder/channel. The exception is for ISDB-T, where - the main carrier has a 1/7 offset from the center. - - #. For ISDB-T, the channels are usually transmitted with an offset of - about 143kHz. E.g. a valid frequency could be 474,143 kHz. The - stepping is bound to the bandwidth of the channel which is - typically 6MHz. - - #. In ISDB-Tsb, the channel consists of only one or three segments the - frequency step is 429kHz, 3*429 respectively. - - -.. _DTV-MODULATION: - -DTV_MODULATION -============== - -Specifies the frontend modulation type for delivery systems that -supports more multiple modulations. - -The modulation can be one of the types defined by enum :c:type:`fe_modulation`. - -Most of the digital TV standards offers more than one possible -modulation type. - -The table below presents a summary of the types of modulation types -supported by each delivery system, as currently defined by specs. - -======================= ======================================================= -Standard Modulation types -======================= ======================================================= -ATSC (version 1) 8-VSB and 16-VSB. -DMTB 4-QAM, 16-QAM, 32-QAM, 64-QAM and 4-QAM-NR. -DVB-C Annex A/C 16-QAM, 32-QAM, 64-QAM and 256-QAM. -DVB-C Annex B 64-QAM. -DVB-T QPSK, 16-QAM and 64-QAM. -DVB-T2 QPSK, 16-QAM, 64-QAM and 256-QAM. -DVB-S No need to set. It supports only QPSK. -DVB-S2 QPSK, 8-PSK, 16-APSK and 32-APSK. -ISDB-T QPSK, DQPSK, 16-QAM and 64-QAM. -ISDB-S 8-PSK, QPSK and BPSK. -======================= ======================================================= - -.. note:: - - Please notice that some of the above modulation types may not be - defined currently at the Kernel. The reason is simple: no driver - needed such definition yet. - - -.. _DTV-BANDWIDTH-HZ: - -DTV_BANDWIDTH_HZ -================ - -Bandwidth for the channel, in HZ. - -Should be set only for terrestrial delivery systems. - -Possible values: ``1712000``, ``5000000``, ``6000000``, ``7000000``, -``8000000``, ``10000000``. - -======================= ======================================================= -Terrestrial Standard Possible values for bandwidth -======================= ======================================================= -ATSC (version 1) No need to set. It is always 6MHz. -DMTB No need to set. It is always 8MHz. -DVB-T 6MHz, 7MHz and 8MHz. -DVB-T2 1.172 MHz, 5MHz, 6MHz, 7MHz, 8MHz and 10MHz -ISDB-T 5MHz, 6MHz, 7MHz and 8MHz, although most places - use 6MHz. -======================= ======================================================= - - -.. note:: - - - #. For ISDB-Tsb, the bandwidth can vary depending on the number of - connected segments. - - It can be easily derived from other parameters - (DTV_ISDBT_SB_SEGMENT_IDX, DTV_ISDBT_SB_SEGMENT_COUNT). - - #. On Satellite and Cable delivery systems, the bandwidth depends on - the symbol rate. So, the Kernel will silently ignore any setting - :ref:`DTV-BANDWIDTH-HZ`. I will however fill it back with a - bandwidth estimation. - - Such bandwidth estimation takes into account the symbol rate set with - :ref:`DTV-SYMBOL-RATE`, and the rolloff factor, with is fixed for - DVB-C and DVB-S. - - For DVB-S2, the rolloff should also be set via :ref:`DTV-ROLLOFF`. - - -.. _DTV-INVERSION: - -DTV_INVERSION -============= - -Specifies if the frontend should do spectral inversion or not. - -The acceptable values are defined by :c:type:`fe_spectral_inversion`. - - -.. _DTV-DISEQC-MASTER: - -DTV_DISEQC_MASTER -================= - -Currently not implemented. - - -.. _DTV-SYMBOL-RATE: - -DTV_SYMBOL_RATE -=============== - -Used on cable and satellite delivery systems. - -Digital TV symbol rate, in bauds (symbols/second). - - -.. _DTV-INNER-FEC: - -DTV_INNER_FEC -============= - -Used on cable and satellite delivery systems. - -The acceptable values are defined by :c:type:`fe_code_rate`. - - -.. _DTV-VOLTAGE: - -DTV_VOLTAGE -=========== - -Used on satellite delivery systems. - -The voltage is usually used with non-DiSEqC capable LNBs to switch the -polarzation (horizontal/vertical). When using DiSEqC epuipment this -voltage has to be switched consistently to the DiSEqC commands as -described in the DiSEqC spec. - -The acceptable values are defined by :c:type:`fe_sec_voltage`. - - -.. _DTV-TONE: - -DTV_TONE -======== - -Currently not used. - - -.. _DTV-PILOT: - -DTV_PILOT -========= - -Used on DVB-S2. - -Sets DVB-S2 pilot. - -The acceptable values are defined by :c:type:`fe_pilot`. - - -.. _DTV-ROLLOFF: - -DTV_ROLLOFF -=========== - -Used on DVB-S2. - -Sets DVB-S2 rolloff. - -The acceptable values are defined by :c:type:`fe_rolloff`. - - -.. _DTV-DISEQC-SLAVE-REPLY: - -DTV_DISEQC_SLAVE_REPLY -====================== - -Currently not implemented. - - -.. _DTV-FE-CAPABILITY-COUNT: - -DTV_FE_CAPABILITY_COUNT -======================= - -Currently not implemented. - - -.. _DTV-FE-CAPABILITY: - -DTV_FE_CAPABILITY -================= - -Currently not implemented. - - -.. _DTV-DELIVERY-SYSTEM: - -DTV_DELIVERY_SYSTEM -=================== - -Specifies the type of the delivery system. - -The acceptable values are defined by :c:type:`fe_delivery_system`. - - -.. _DTV-ISDBT-PARTIAL-RECEPTION: - -DTV_ISDBT_PARTIAL_RECEPTION -=========================== - -Used only on ISDB. - -If ``DTV_ISDBT_SOUND_BROADCASTING`` is '0' this bit-field represents -whether the channel is in partial reception mode or not. - -If '1' ``DTV_ISDBT_LAYERA_*`` values are assigned to the center segment -and ``DTV_ISDBT_LAYERA_SEGMENT_COUNT`` has to be '1'. - -If in addition ``DTV_ISDBT_SOUND_BROADCASTING`` is '1' -``DTV_ISDBT_PARTIAL_RECEPTION`` represents whether this ISDB-Tsb channel -is consisting of one segment and layer or three segments and two layers. - -Possible values: 0, 1, -1 (AUTO) - - -.. _DTV-ISDBT-SOUND-BROADCASTING: - -DTV_ISDBT_SOUND_BROADCASTING -============================ - -Used only on ISDB. - -This field represents whether the other DTV_ISDBT_*-parameters are -referring to an ISDB-T and an ISDB-Tsb channel. (See also -``DTV_ISDBT_PARTIAL_RECEPTION``). - -Possible values: 0, 1, -1 (AUTO) - - -.. _DTV-ISDBT-SB-SUBCHANNEL-ID: - -DTV_ISDBT_SB_SUBCHANNEL_ID -========================== - -Used only on ISDB. - -This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. - -(Note of the author: This might not be the correct description of the -``SUBCHANNEL-ID`` in all details, but it is my understanding of the -technical background needed to program a device) - -An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a -set of connected ISDB-Tsb channels. In this set of channels every -channel can be received independently. The number of connected ISDB-Tsb -segment can vary, e.g. depending on the frequency spectrum bandwidth -available. - -Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The -broadcaster has several possibilities to put those channels in the air: -Assuming a normal 13-segment ISDB-T spectrum he can align the 8 segments -from position 1-8 to 5-13 or anything in between. - -The underlying layer of segments are subchannels: each segment is -consisting of several subchannels with a predefined IDs. A sub-channel -is used to help the demodulator to synchronize on the channel. - -An ISDB-T channel is always centered over all sub-channels. As for the -example above, in ISDB-Tsb it is no longer as simple as that. - -``The DTV_ISDBT_SB_SUBCHANNEL_ID`` parameter is used to give the -sub-channel ID of the segment to be demodulated. - -Possible values: 0 .. 41, -1 (AUTO) - - -.. _DTV-ISDBT-SB-SEGMENT-IDX: - -DTV_ISDBT_SB_SEGMENT_IDX -======================== - -Used only on ISDB. - -This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. - -``DTV_ISDBT_SB_SEGMENT_IDX`` gives the index of the segment to be -demodulated for an ISDB-Tsb channel where several of them are -transmitted in the connected manner. - -Possible values: 0 .. ``DTV_ISDBT_SB_SEGMENT_COUNT`` - 1 - -Note: This value cannot be determined by an automatic channel search. - - -.. _DTV-ISDBT-SB-SEGMENT-COUNT: - -DTV_ISDBT_SB_SEGMENT_COUNT -========================== - -Used only on ISDB. - -This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. - -``DTV_ISDBT_SB_SEGMENT_COUNT`` gives the total count of connected -ISDB-Tsb channels. - -Possible values: 1 .. 13 - -Note: This value cannot be determined by an automatic channel search. - - -.. _isdb-hierq-layers: - -DTV-ISDBT-LAYER[A-C] parameters -=============================== - -Used only on ISDB. - -ISDB-T channels can be coded hierarchically. As opposed to DVB-T in -ISDB-T hierarchical layers can be decoded simultaneously. For that -reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders. - -ISDB-T has 3 hierarchical layers which each can use a part of the -available segments. The total number of segments over all layers has to -13 in ISDB-T. - -There are 3 parameter sets, for Layers A, B and C. - - -.. _DTV-ISDBT-LAYER-ENABLED: - -DTV_ISDBT_LAYER_ENABLED ------------------------ - -Used only on ISDB. - -Hierarchical reception in ISDB-T is achieved by enabling or disabling -layers in the decoding process. Setting all bits of -``DTV_ISDBT_LAYER_ENABLED`` to '1' forces all layers (if applicable) to -be demodulated. This is the default. - -If the channel is in the partial reception mode -(``DTV_ISDBT_PARTIAL_RECEPTION`` = 1) the central segment can be decoded -independently of the other 12 segments. In that mode layer A has to have -a ``SEGMENT_COUNT`` of 1. - -In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb according -to ``DTV_ISDBT_PARTIAL_RECEPTION``. ``SEGMENT_COUNT`` must be filled -accordingly. - -Only the values of the first 3 bits are used. Other bits will be silently ignored: - -``DTV_ISDBT_LAYER_ENABLED`` bit 0: layer A enabled - -``DTV_ISDBT_LAYER_ENABLED`` bit 1: layer B enabled - -``DTV_ISDBT_LAYER_ENABLED`` bit 2: layer C enabled - -``DTV_ISDBT_LAYER_ENABLED`` bits 3-31: unused - - -.. _DTV-ISDBT-LAYER-FEC: - -DTV_ISDBT_LAYER[A-C]_FEC ------------------------- - -Used only on ISDB. - -The Forward Error Correction mechanism used by a given ISDB Layer, as -defined by :c:type:`fe_code_rate`. - - -Possible values are: ``FEC_AUTO``, ``FEC_1_2``, ``FEC_2_3``, ``FEC_3_4``, -``FEC_5_6``, ``FEC_7_8`` - - -.. _DTV-ISDBT-LAYER-MODULATION: - -DTV_ISDBT_LAYER[A-C]_MODULATION -------------------------------- - -Used only on ISDB. - -The modulation used by a given ISDB Layer, as defined by -:c:type:`fe_modulation`. - -Possible values are: ``QAM_AUTO``, ``QPSK``, ``QAM_16``, ``QAM_64``, ``DQPSK`` - -.. note:: - - #. If layer C is ``DQPSK``, then layer B has to be ``DQPSK``. - - #. If layer B is ``DQPSK`` and ``DTV_ISDBT_PARTIAL_RECEPTION``\ = 0, - then layer has to be ``DQPSK``. - - -.. _DTV-ISDBT-LAYER-SEGMENT-COUNT: - -DTV_ISDBT_LAYER[A-C]_SEGMENT_COUNT ----------------------------------- - -Used only on ISDB. - -Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO) - -Note: Truth table for ``DTV_ISDBT_SOUND_BROADCASTING`` and -``DTV_ISDBT_PARTIAL_RECEPTION`` and ``LAYER[A-C]_SEGMENT_COUNT`` - -.. _isdbt-layer_seg-cnt-table: - -.. flat-table:: Truth table for ISDB-T Sound Broadcasting - :header-rows: 1 - :stub-columns: 0 - - - - .. row 1 - - - Partial Reception - - - Sound Broadcasting - - - Layer A width - - - Layer B width - - - Layer C width - - - total width - - - .. row 2 - - - 0 - - - 0 - - - 1 .. 13 - - - 1 .. 13 - - - 1 .. 13 - - - 13 - - - .. row 3 - - - 1 - - - 0 - - - 1 - - - 1 .. 13 - - - 1 .. 13 - - - 13 - - - .. row 4 - - - 0 - - - 1 - - - 1 - - - 0 - - - 0 - - - 1 - - - .. row 5 - - - 1 - - - 1 - - - 1 - - - 2 - - - 0 - - - 13 - - - -.. _DTV-ISDBT-LAYER-TIME-INTERLEAVING: - -DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING --------------------------------------- - -Used only on ISDB. - -Valid values: 0, 1, 2, 4, -1 (AUTO) - -when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid. - -Note: The real time interleaving length depends on the mode (fft-size). -The values here are referring to what can be found in the -TMCC-structure, as shown in the table below. - - -.. c:type:: isdbt_layer_interleaving_table - -.. flat-table:: ISDB-T time interleaving modes - :header-rows: 1 - :stub-columns: 0 - - - - .. row 1 - - - ``DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING`` - - - Mode 1 (2K FFT) - - - Mode 2 (4K FFT) - - - Mode 3 (8K FFT) - - - .. row 2 - - - 0 - - - 0 - - - 0 - - - 0 - - - .. row 3 - - - 1 - - - 4 - - - 2 - - - 1 - - - .. row 4 - - - 2 - - - 8 - - - 4 - - - 2 - - - .. row 5 - - - 4 - - - 16 - - - 8 - - - 4 - - - -.. _DTV-ATSCMH-FIC-VER: - -DTV_ATSCMH_FIC_VER ------------------- - -Used only on ATSC-MH. - -Version number of the FIC (Fast Information Channel) signaling data. - -FIC is used for relaying information to allow rapid service acquisition -by the receiver. - -Possible values: 0, 1, 2, 3, ..., 30, 31 - - -.. _DTV-ATSCMH-PARADE-ID: - -DTV_ATSCMH_PARADE_ID --------------------- - -Used only on ATSC-MH. - -Parade identification number - -A parade is a collection of up to eight MH groups, conveying one or two -ensembles. - -Possible values: 0, 1, 2, 3, ..., 126, 127 - - -.. _DTV-ATSCMH-NOG: - -DTV_ATSCMH_NOG --------------- - -Used only on ATSC-MH. - -Number of MH groups per MH subframe for a designated parade. - -Possible values: 1, 2, 3, 4, 5, 6, 7, 8 - - -.. _DTV-ATSCMH-TNOG: - -DTV_ATSCMH_TNOG ---------------- - -Used only on ATSC-MH. - -Total number of MH groups including all MH groups belonging to all MH -parades in one MH subframe. - -Possible values: 0, 1, 2, 3, ..., 30, 31 - - -.. _DTV-ATSCMH-SGN: - -DTV_ATSCMH_SGN --------------- - -Used only on ATSC-MH. - -Start group number. - -Possible values: 0, 1, 2, 3, ..., 14, 15 - - -.. _DTV-ATSCMH-PRC: - -DTV_ATSCMH_PRC --------------- - -Used only on ATSC-MH. - -Parade repetition cycle. - -Possible values: 1, 2, 3, 4, 5, 6, 7, 8 - - -.. _DTV-ATSCMH-RS-FRAME-MODE: - -DTV_ATSCMH_RS_FRAME_MODE ------------------------- - -Used only on ATSC-MH. - -Reed Solomon (RS) frame mode. - -The acceptable values are defined by :c:type:`atscmh_rs_frame_mode`. - - -.. _DTV-ATSCMH-RS-FRAME-ENSEMBLE: - -DTV_ATSCMH_RS_FRAME_ENSEMBLE ----------------------------- - -Used only on ATSC-MH. - -Reed Solomon(RS) frame ensemble. - -The acceptable values are defined by :c:type:`atscmh_rs_frame_ensemble`. - - -.. _DTV-ATSCMH-RS-CODE-MODE-PRI: - -DTV_ATSCMH_RS_CODE_MODE_PRI ---------------------------- - -Used only on ATSC-MH. - -Reed Solomon (RS) code mode (primary). - -The acceptable values are defined by :c:type:`atscmh_rs_code_mode`. - - -.. _DTV-ATSCMH-RS-CODE-MODE-SEC: - -DTV_ATSCMH_RS_CODE_MODE_SEC ---------------------------- - -Used only on ATSC-MH. - -Reed Solomon (RS) code mode (secondary). - -The acceptable values are defined by :c:type:`atscmh_rs_code_mode`. - - -.. _DTV-ATSCMH-SCCC-BLOCK-MODE: - -DTV_ATSCMH_SCCC_BLOCK_MODE --------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Block Mode. - -The acceptable values are defined by :c:type:`atscmh_sccc_block_mode`. - - -.. _DTV-ATSCMH-SCCC-CODE-MODE-A: - -DTV_ATSCMH_SCCC_CODE_MODE_A ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -The acceptable values are defined by :c:type:`atscmh_sccc_code_mode`. - -.. _DTV-ATSCMH-SCCC-CODE-MODE-B: - -DTV_ATSCMH_SCCC_CODE_MODE_B ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -Possible values are the same as documented on enum -:c:type:`atscmh_sccc_code_mode`. - - -.. _DTV-ATSCMH-SCCC-CODE-MODE-C: - -DTV_ATSCMH_SCCC_CODE_MODE_C ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -Possible values are the same as documented on enum -:c:type:`atscmh_sccc_code_mode`. - - -.. _DTV-ATSCMH-SCCC-CODE-MODE-D: - -DTV_ATSCMH_SCCC_CODE_MODE_D ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -Possible values are the same as documented on enum -:c:type:`atscmh_sccc_code_mode`. - - -.. _DTV-API-VERSION: - -DTV_API_VERSION -=============== - -Returns the major/minor version of the Digital TV API - - -.. _DTV-CODE-RATE-HP: - -DTV_CODE_RATE_HP -================ - -Used on terrestrial transmissions. - -The acceptable values are defined by :c:type:`fe_transmit_mode`. - - -.. _DTV-CODE-RATE-LP: - -DTV_CODE_RATE_LP -================ - -Used on terrestrial transmissions. - -The acceptable values are defined by :c:type:`fe_transmit_mode`. - - -.. _DTV-GUARD-INTERVAL: - -DTV_GUARD_INTERVAL -================== - -The acceptable values are defined by :c:type:`fe_guard_interval`. - -.. note:: - - #. If ``DTV_GUARD_INTERVAL`` is set the ``GUARD_INTERVAL_AUTO`` the - hardware will try to find the correct guard interval (if capable) and - will use TMCC to fill in the missing parameters. - #. Intervals ``GUARD_INTERVAL_1_128``, ``GUARD_INTERVAL_19_128`` - and ``GUARD_INTERVAL_19_256`` are used only for DVB-T2 at - present. - #. Intervals ``GUARD_INTERVAL_PN420``, ``GUARD_INTERVAL_PN595`` and - ``GUARD_INTERVAL_PN945`` are used only for DMTB at the present. - On such standard, only those intervals and ``GUARD_INTERVAL_AUTO`` - are valid. - -.. _DTV-TRANSMISSION-MODE: - -DTV_TRANSMISSION_MODE -===================== - - -Used only on OFTM-based standards, e. g. DVB-T/T2, ISDB-T, DTMB. - -Specifies the FFT size (with corresponds to the approximate number of -carriers) used by the standard. - -The acceptable values are defined by :c:type:`fe_transmit_mode`. - -.. note:: - - #. ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called - **mode** on such standard, and are numbered from 1 to 3: - - ==== ======== ======================== - Mode FFT size Transmission mode - ==== ======== ======================== - 1 2K ``TRANSMISSION_MODE_2K`` - 2 4K ``TRANSMISSION_MODE_4K`` - 3 8K ``TRANSMISSION_MODE_8K`` - ==== ======== ======================== - - #. If ``DTV_TRANSMISSION_MODE`` is set the ``TRANSMISSION_MODE_AUTO`` - the hardware will try to find the correct FFT-size (if capable) and - will use TMCC to fill in the missing parameters. - - #. DVB-T specifies 2K and 8K as valid sizes. - - #. DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K. - - #. DTMB specifies C1 and C3780. - - -.. _DTV-HIERARCHY: - -DTV_HIERARCHY -============= - -Used only on DVB-T and DVB-T2. - -Frontend hierarchy. - -The acceptable values are defined by :c:type:`fe_hierarchy`. - - -.. _DTV-STREAM-ID: - -DTV_STREAM_ID -============= - -Used on DVB-S2, DVB-T2 and ISDB-S. - -DVB-S2, DVB-T2 and ISDB-S support the transmission of several streams on -a single transport stream. This property enables the digital TV driver to -handle substream filtering, when supported by the hardware. By default, -substream filtering is disabled. - -For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255. - -For ISDB, the valid substream id range is from 1 to 65535. - -To disable it, you should use the special macro NO_STREAM_ID_FILTER. - -Note: any value outside the id range also disables filtering. - - -.. _DTV-DVBT2-PLP-ID-LEGACY: - -DTV_DVBT2_PLP_ID_LEGACY -======================= - -Obsolete, replaced with DTV_STREAM_ID. - - -.. _DTV-ENUM-DELSYS: - -DTV_ENUM_DELSYS -=============== - -A Multi standard frontend needs to advertise the delivery systems -provided. Applications need to enumerate the provided delivery systems, -before using any other operation with the frontend. Prior to it's -introduction, FE_GET_INFO was used to determine a frontend type. A -frontend which provides more than a single delivery system, -FE_GET_INFO doesn't help much. Applications which intends to use a -multistandard frontend must enumerate the delivery systems associated -with it, rather than trying to use FE_GET_INFO. In the case of a -legacy frontend, the result is just the same as with FE_GET_INFO, but -in a more structured format - -The acceptable values are defined by :c:type:`fe_delivery_system`. - - -.. _DTV-INTERLEAVING: - -DTV_INTERLEAVING -================ - -Time interleaving to be used. - -The acceptable values are defined by :c:type:`fe_interleaving`. - - -.. _DTV-LNA: - -DTV_LNA -======= - -Low-noise amplifier. - -Hardware might offer controllable LNA which can be set manually using -that parameter. Usually LNA could be found only from terrestrial devices -if at all. - -Possible values: 0, 1, LNA_AUTO - -0, LNA off - -1, LNA on - -use the special macro LNA_AUTO to set LNA auto - - -.. _DTV-SCRAMBLING-SEQUENCE-INDEX: - -DTV_SCRAMBLING_SEQUENCE_INDEX -============================= - -Used on DVB-S2. - -This 18 bit field, when present, carries the index of the DVB-S2 physical -layer scrambling sequence as defined in clause 5.5.4 of EN 302 307. -There is no explicit signalling method to convey scrambling sequence index -to the receiver. If S2 satellite delivery system descriptor is available -it can be used to read the scrambling sequence index (EN 300 468 table 41). - -By default, gold scrambling sequence index 0 is used. - -The valid scrambling sequence index range is from 0 to 262142. diff --git a/Documentation/media/uapi/dvb/frontend-header.rst b/Documentation/media/uapi/dvb/frontend-header.rst deleted file mode 100644 index 635fb4251214..000000000000 --- a/Documentation/media/uapi/dvb/frontend-header.rst +++ /dev/null @@ -1,13 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -Frontend uAPI data types -======================== - -.. kernel-doc:: include/uapi/linux/dvb/frontend.h diff --git a/Documentation/media/uapi/dvb/frontend-property-cable-systems.rst b/Documentation/media/uapi/dvb/frontend-property-cable-systems.rst deleted file mode 100644 index 97fbfc228c10..000000000000 --- a/Documentation/media/uapi/dvb/frontend-property-cable-systems.rst +++ /dev/null @@ -1,82 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend-property-cable-systems: - -***************************************** -Properties used on cable delivery systems -***************************************** - - -.. _dvbc-params: - -DVB-C delivery system -===================== - -The DVB-C Annex-A is the widely used cable standard. Transmission uses -QAM modulation. - -The DVB-C Annex-C is optimized for 6MHz, and is used in Japan. It -supports a subset of the Annex A modulation types, and a roll-off of -0.13, instead of 0.15 - -The following parameters are valid for DVB-C Annex A/C: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` - -- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` - -- :ref:`DTV_LNA <DTV-LNA>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _dvbc-annex-b-params: - -DVB-C Annex B delivery system -============================= - -The DVB-C Annex-B is only used on a few Countries like the United -States. - -The following parameters are valid for DVB-C Annex B: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_LNA <DTV-LNA>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. diff --git a/Documentation/media/uapi/dvb/frontend-property-satellite-systems.rst b/Documentation/media/uapi/dvb/frontend-property-satellite-systems.rst deleted file mode 100644 index 2bc880a3c826..000000000000 --- a/Documentation/media/uapi/dvb/frontend-property-satellite-systems.rst +++ /dev/null @@ -1,112 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend-property-satellite-systems: - -********************************************* -Properties used on satellite delivery systems -********************************************* - - -.. _dvbs-params: - -DVB-S delivery system -===================== - -The following parameters are valid for DVB-S: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` - -- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` - -- :ref:`DTV_VOLTAGE <DTV-VOLTAGE>` - -- :ref:`DTV_TONE <DTV-TONE>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - -Future implementations might add those two missing parameters: - -- :ref:`DTV_DISEQC_MASTER <DTV-DISEQC-MASTER>` - -- :ref:`DTV_DISEQC_SLAVE_REPLY <DTV-DISEQC-SLAVE-REPLY>` - - -.. _dvbs2-params: - -DVB-S2 delivery system -====================== - -In addition to all parameters valid for DVB-S, DVB-S2 supports the -following parameters: - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_PILOT <DTV-PILOT>` - -- :ref:`DTV_ROLLOFF <DTV-ROLLOFF>` - -- :ref:`DTV_STREAM_ID <DTV-STREAM-ID>` - -- :ref:`DTV_SCRAMBLING_SEQUENCE_INDEX <DTV-SCRAMBLING-SEQUENCE-INDEX>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _turbo-params: - -Turbo code delivery system -========================== - -In addition to all parameters valid for DVB-S, turbo code supports the -following parameters: - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - - -.. _isdbs-params: - -ISDB-S delivery system -====================== - -The following parameters are valid for ISDB-S: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_SYMBOL_RATE <DTV-SYMBOL-RATE>` - -- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` - -- :ref:`DTV_VOLTAGE <DTV-VOLTAGE>` - -- :ref:`DTV_STREAM_ID <DTV-STREAM-ID>` diff --git a/Documentation/media/uapi/dvb/frontend-property-terrestrial-systems.rst b/Documentation/media/uapi/dvb/frontend-property-terrestrial-systems.rst deleted file mode 100644 index c20af13297e5..000000000000 --- a/Documentation/media/uapi/dvb/frontend-property-terrestrial-systems.rst +++ /dev/null @@ -1,301 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend-property-terrestrial-systems: - -*********************************************** -Properties used on terrestrial delivery systems -*********************************************** - - -.. _dvbt-params: - -DVB-T delivery system -===================== - -The following parameters are valid for DVB-T: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_CODE_RATE_HP <DTV-CODE-RATE-HP>` - -- :ref:`DTV_CODE_RATE_LP <DTV-CODE-RATE-LP>` - -- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>` - -- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>` - -- :ref:`DTV_HIERARCHY <DTV-HIERARCHY>` - -- :ref:`DTV_LNA <DTV-LNA>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _dvbt2-params: - -DVB-T2 delivery system -====================== - -DVB-T2 support is currently in the early stages of development, so -expect that this section maygrow and become more detailed with time. - -The following parameters are valid for DVB-T2: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_CODE_RATE_HP <DTV-CODE-RATE-HP>` - -- :ref:`DTV_CODE_RATE_LP <DTV-CODE-RATE-LP>` - -- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>` - -- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>` - -- :ref:`DTV_HIERARCHY <DTV-HIERARCHY>` - -- :ref:`DTV_STREAM_ID <DTV-STREAM-ID>` - -- :ref:`DTV_LNA <DTV-LNA>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _isdbt: - -ISDB-T delivery system -====================== - -This ISDB-T/ISDB-Tsb API extension should reflect all information needed -to tune any ISDB-T/ISDB-Tsb hardware. Of course it is possible that some -very sophisticated devices won't need certain parameters to tune. - -The information given here should help application writers to know how -to handle ISDB-T and ISDB-Tsb hardware using the Linux Digital TV API. - -The details given here about ISDB-T and ISDB-Tsb are just enough to -basically show the dependencies between the needed parameter values, but -surely some information is left out. For more detailed information see -the following documents: - -ARIB STD-B31 - "Transmission System for Digital Terrestrial Television -Broadcasting" and - -ARIB TR-B14 - "Operational Guidelines for Digital Terrestrial Television -Broadcasting". - -In order to understand the ISDB specific parameters, one has to have -some knowledge the channel structure in ISDB-T and ISDB-Tsb. I.e. it has -to be known to the reader that an ISDB-T channel consists of 13 -segments, that it can have up to 3 layer sharing those segments, and -things like that. - -The following parameters are valid for ISDB-T: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>` - -- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>` - -- :ref:`DTV_ISDBT_LAYER_ENABLED <DTV-ISDBT-LAYER-ENABLED>` - -- :ref:`DTV_ISDBT_PARTIAL_RECEPTION <DTV-ISDBT-PARTIAL-RECEPTION>` - -- :ref:`DTV_ISDBT_SOUND_BROADCASTING <DTV-ISDBT-SOUND-BROADCASTING>` - -- :ref:`DTV_ISDBT_SB_SUBCHANNEL_ID <DTV-ISDBT-SB-SUBCHANNEL-ID>` - -- :ref:`DTV_ISDBT_SB_SEGMENT_IDX <DTV-ISDBT-SB-SEGMENT-IDX>` - -- :ref:`DTV_ISDBT_SB_SEGMENT_COUNT <DTV-ISDBT-SB-SEGMENT-COUNT>` - -- :ref:`DTV_ISDBT_LAYERA_FEC <DTV-ISDBT-LAYER-FEC>` - -- :ref:`DTV_ISDBT_LAYERA_MODULATION <DTV-ISDBT-LAYER-MODULATION>` - -- :ref:`DTV_ISDBT_LAYERA_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>` - -- :ref:`DTV_ISDBT_LAYERA_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>` - -- :ref:`DTV_ISDBT_LAYERB_FEC <DTV-ISDBT-LAYER-FEC>` - -- :ref:`DTV_ISDBT_LAYERB_MODULATION <DTV-ISDBT-LAYER-MODULATION>` - -- :ref:`DTV_ISDBT_LAYERB_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>` - -- :ref:`DTV_ISDBT_LAYERB_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>` - -- :ref:`DTV_ISDBT_LAYERC_FEC <DTV-ISDBT-LAYER-FEC>` - -- :ref:`DTV_ISDBT_LAYERC_MODULATION <DTV-ISDBT-LAYER-MODULATION>` - -- :ref:`DTV_ISDBT_LAYERC_SEGMENT_COUNT <DTV-ISDBT-LAYER-SEGMENT-COUNT>` - -- :ref:`DTV_ISDBT_LAYERC_TIME_INTERLEAVING <DTV-ISDBT-LAYER-TIME-INTERLEAVING>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _atsc-params: - -ATSC delivery system -==================== - -The following parameters are valid for ATSC: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _atscmh-params: - -ATSC-MH delivery system -======================= - -The following parameters are valid for ATSC-MH: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>` - -- :ref:`DTV_ATSCMH_FIC_VER <DTV-ATSCMH-FIC-VER>` - -- :ref:`DTV_ATSCMH_PARADE_ID <DTV-ATSCMH-PARADE-ID>` - -- :ref:`DTV_ATSCMH_NOG <DTV-ATSCMH-NOG>` - -- :ref:`DTV_ATSCMH_TNOG <DTV-ATSCMH-TNOG>` - -- :ref:`DTV_ATSCMH_SGN <DTV-ATSCMH-SGN>` - -- :ref:`DTV_ATSCMH_PRC <DTV-ATSCMH-PRC>` - -- :ref:`DTV_ATSCMH_RS_FRAME_MODE <DTV-ATSCMH-RS-FRAME-MODE>` - -- :ref:`DTV_ATSCMH_RS_FRAME_ENSEMBLE <DTV-ATSCMH-RS-FRAME-ENSEMBLE>` - -- :ref:`DTV_ATSCMH_RS_CODE_MODE_PRI <DTV-ATSCMH-RS-CODE-MODE-PRI>` - -- :ref:`DTV_ATSCMH_RS_CODE_MODE_SEC <DTV-ATSCMH-RS-CODE-MODE-SEC>` - -- :ref:`DTV_ATSCMH_SCCC_BLOCK_MODE <DTV-ATSCMH-SCCC-BLOCK-MODE>` - -- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_A <DTV-ATSCMH-SCCC-CODE-MODE-A>` - -- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_B <DTV-ATSCMH-SCCC-CODE-MODE-B>` - -- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_C <DTV-ATSCMH-SCCC-CODE-MODE-C>` - -- :ref:`DTV_ATSCMH_SCCC_CODE_MODE_D <DTV-ATSCMH-SCCC-CODE-MODE-D>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. - - -.. _dtmb-params: - -DTMB delivery system -==================== - -The following parameters are valid for DTMB: - -- :ref:`DTV_API_VERSION <DTV-API-VERSION>` - -- :ref:`DTV_DELIVERY_SYSTEM <DTV-DELIVERY-SYSTEM>` - -- :ref:`DTV_TUNE <DTV-TUNE>` - -- :ref:`DTV_CLEAR <DTV-CLEAR>` - -- :ref:`DTV_FREQUENCY <DTV-FREQUENCY>` - -- :ref:`DTV_MODULATION <DTV-MODULATION>` - -- :ref:`DTV_BANDWIDTH_HZ <DTV-BANDWIDTH-HZ>` - -- :ref:`DTV_INVERSION <DTV-INVERSION>` - -- :ref:`DTV_INNER_FEC <DTV-INNER-FEC>` - -- :ref:`DTV_GUARD_INTERVAL <DTV-GUARD-INTERVAL>` - -- :ref:`DTV_TRANSMISSION_MODE <DTV-TRANSMISSION-MODE>` - -- :ref:`DTV_INTERLEAVING <DTV-INTERLEAVING>` - -- :ref:`DTV_LNA <DTV-LNA>` - -In addition, the :ref:`DTV QoS statistics <frontend-stat-properties>` -are also valid. diff --git a/Documentation/media/uapi/dvb/frontend-stat-properties.rst b/Documentation/media/uapi/dvb/frontend-stat-properties.rst deleted file mode 100644 index 546464db04b5..000000000000 --- a/Documentation/media/uapi/dvb/frontend-stat-properties.rst +++ /dev/null @@ -1,252 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend-stat-properties: - -****************************** -Frontend statistics indicators -****************************** - -The values are returned via ``dtv_property.stat``. If the property is -supported, ``dtv_property.stat.len`` is bigger than zero. - -For most delivery systems, ``dtv_property.stat.len`` will be 1 if the -stats is supported, and the properties will return a single value for -each parameter. - -It should be noted, however, that new OFDM delivery systems like ISDB -can use different modulation types for each group of carriers. On such -standards, up to 3 groups of statistics can be provided, and -``dtv_property.stat.len`` is updated to reflect the "global" metrics, -plus one metric per each carrier group (called "layer" on ISDB). - -So, in order to be consistent with other delivery systems, the first -value at :c:type:`dtv_property.stat.dtv_stats <dtv_stats>` array refers -to the global metric. The other elements of the array represent each -layer, starting from layer A(index 1), layer B (index 2) and so on. - -The number of filled elements are stored at ``dtv_property.stat.len``. - -Each element of the ``dtv_property.stat.dtv_stats`` array consists on -two elements: - -- ``svalue`` or ``uvalue``, where ``svalue`` is for signed values of - the measure (dB measures) and ``uvalue`` is for unsigned values - (counters, relative scale) - -- ``scale`` - Scale for the value. It can be: - - - ``FE_SCALE_NOT_AVAILABLE`` - The parameter is supported by the - frontend, but it was not possible to collect it (could be a - transitory or permanent condition) - - - ``FE_SCALE_DECIBEL`` - parameter is a signed value, measured in - 1/1000 dB - - - ``FE_SCALE_RELATIVE`` - parameter is a unsigned value, where 0 - means 0% and 65535 means 100%. - - - ``FE_SCALE_COUNTER`` - parameter is a unsigned value that counts - the occurrence of an event, like bit error, block error, or lapsed - time. - - -.. _DTV-STAT-SIGNAL-STRENGTH: - -DTV_STAT_SIGNAL_STRENGTH -======================== - -Indicates the signal strength level at the analog part of the tuner or -of the demod. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_DECIBEL`` - signal strength is in 0.001 dBm units, power - measured in miliwatts. This value is generally negative. - -- ``FE_SCALE_RELATIVE`` - The frontend provides a 0% to 100% - measurement for power (actually, 0 to 65535). - - -.. _DTV-STAT-CNR: - -DTV_STAT_CNR -============ - -Indicates the Signal to Noise ratio for the main carrier. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_DECIBEL`` - Signal/Noise ratio is in 0.001 dB units. - -- ``FE_SCALE_RELATIVE`` - The frontend provides a 0% to 100% - measurement for Signal/Noise (actually, 0 to 65535). - - -.. _DTV-STAT-PRE-ERROR-BIT-COUNT: - -DTV_STAT_PRE_ERROR_BIT_COUNT -============================ - -Measures the number of bit errors before the forward error correction -(FEC) on the inner coding block (before Viterbi, LDPC or other inner -code). - -This measure is taken during the same interval as -``DTV_STAT_PRE_TOTAL_BIT_COUNT``. - -In order to get the BER (Bit Error Rate) measurement, it should be -divided by -:ref:`DTV_STAT_PRE_TOTAL_BIT_COUNT <DTV-STAT-PRE-TOTAL-BIT-COUNT>`. - -This measurement is monotonically increased, as the frontend gets more -bit count measurements. The frontend may reset it when a -channel/transponder is tuned. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_COUNTER`` - Number of error bits counted before the inner - coding. - - -.. _DTV-STAT-PRE-TOTAL-BIT-COUNT: - -DTV_STAT_PRE_TOTAL_BIT_COUNT -============================ - -Measures the amount of bits received before the inner code block, during -the same period as -:ref:`DTV_STAT_PRE_ERROR_BIT_COUNT <DTV-STAT-PRE-ERROR-BIT-COUNT>` -measurement was taken. - -It should be noted that this measurement can be smaller than the total -amount of bits on the transport stream, as the frontend may need to -manually restart the measurement, losing some data between each -measurement interval. - -This measurement is monotonically increased, as the frontend gets more -bit count measurements. The frontend may reset it when a -channel/transponder is tuned. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_COUNTER`` - Number of bits counted while measuring - :ref:`DTV_STAT_PRE_ERROR_BIT_COUNT <DTV-STAT-PRE-ERROR-BIT-COUNT>`. - - -.. _DTV-STAT-POST-ERROR-BIT-COUNT: - -DTV_STAT_POST_ERROR_BIT_COUNT -============================= - -Measures the number of bit errors after the forward error correction -(FEC) done by inner code block (after Viterbi, LDPC or other inner -code). - -This measure is taken during the same interval as -``DTV_STAT_POST_TOTAL_BIT_COUNT``. - -In order to get the BER (Bit Error Rate) measurement, it should be -divided by -:ref:`DTV_STAT_POST_TOTAL_BIT_COUNT <DTV-STAT-POST-TOTAL-BIT-COUNT>`. - -This measurement is monotonically increased, as the frontend gets more -bit count measurements. The frontend may reset it when a -channel/transponder is tuned. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_COUNTER`` - Number of error bits counted after the inner - coding. - - -.. _DTV-STAT-POST-TOTAL-BIT-COUNT: - -DTV_STAT_POST_TOTAL_BIT_COUNT -============================= - -Measures the amount of bits received after the inner coding, during the -same period as -:ref:`DTV_STAT_POST_ERROR_BIT_COUNT <DTV-STAT-POST-ERROR-BIT-COUNT>` -measurement was taken. - -It should be noted that this measurement can be smaller than the total -amount of bits on the transport stream, as the frontend may need to -manually restart the measurement, losing some data between each -measurement interval. - -This measurement is monotonically increased, as the frontend gets more -bit count measurements. The frontend may reset it when a -channel/transponder is tuned. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_COUNTER`` - Number of bits counted while measuring - :ref:`DTV_STAT_POST_ERROR_BIT_COUNT <DTV-STAT-POST-ERROR-BIT-COUNT>`. - - -.. _DTV-STAT-ERROR-BLOCK-COUNT: - -DTV_STAT_ERROR_BLOCK_COUNT -========================== - -Measures the number of block errors after the outer forward error -correction coding (after Reed-Solomon or other outer code). - -This measurement is monotonically increased, as the frontend gets more -bit count measurements. The frontend may reset it when a -channel/transponder is tuned. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_COUNTER`` - Number of error blocks counted after the outer - coding. - - -.. _DTV-STAT-TOTAL-BLOCK-COUNT: - -DTV-STAT_TOTAL_BLOCK_COUNT -========================== - -Measures the total number of blocks received during the same period as -:ref:`DTV_STAT_ERROR_BLOCK_COUNT <DTV-STAT-ERROR-BLOCK-COUNT>` -measurement was taken. - -It can be used to calculate the PER indicator, by dividing -:ref:`DTV_STAT_ERROR_BLOCK_COUNT <DTV-STAT-ERROR-BLOCK-COUNT>` by -:ref:`DTV-STAT-TOTAL-BLOCK-COUNT`. - -Possible scales for this metric are: - -- ``FE_SCALE_NOT_AVAILABLE`` - it failed to measure it, or the - measurement was not complete yet. - -- ``FE_SCALE_COUNTER`` - Number of blocks counted while measuring - :ref:`DTV_STAT_ERROR_BLOCK_COUNT <DTV-STAT-ERROR-BLOCK-COUNT>`. diff --git a/Documentation/media/uapi/dvb/frontend.rst b/Documentation/media/uapi/dvb/frontend.rst deleted file mode 100644 index 7ff225dfe11c..000000000000 --- a/Documentation/media/uapi/dvb/frontend.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_frontend: - -####################### -Digital TV Frontend API -####################### - -The Digital TV frontend API was designed to support three groups of delivery -systems: Terrestrial, cable and Satellite. Currently, the following -delivery systems are supported: - -- Terrestrial systems: DVB-T, DVB-T2, ATSC, ATSC M/H, ISDB-T, DVB-H, - DTMB, CMMB - -- Cable systems: DVB-C Annex A/C, ClearQAM (DVB-C Annex B) - -- Satellite systems: DVB-S, DVB-S2, DVB Turbo, ISDB-S, DSS - -The Digital TV frontend controls several sub-devices including: - -- Tuner - -- Digital TV demodulator - -- Low noise amplifier (LNA) - -- Satellite Equipment Control (SEC) [#f1]_. - -The frontend can be accessed through ``/dev/dvb/adapter?/frontend?``. -Data types and ioctl definitions can be accessed by including -``linux/dvb/frontend.h`` in your application. - -.. note:: - - Transmission via the internet (DVB-IP) and MMT (MPEG Media Transport) - is not yet handled by this API but a future extension is possible. - -.. [#f1] - - On Satellite systems, the API support for the Satellite Equipment - Control (SEC) allows to power control and to send/receive signals to - control the antenna subsystem, selecting the polarization and choosing - the Intermediate Frequency IF) of the Low Noise Block Converter Feed - Horn (LNBf). It supports the DiSEqC and V-SEC protocols. The DiSEqC - (digital SEC) specification is available at - `Eutelsat <http://www.eutelsat.com/satellites/4_5_5.html>`__. - - -.. toctree:: - :maxdepth: 1 - - query-dvb-frontend-info - dvb-fe-read-status - dvbproperty - frontend_fcalls diff --git a/Documentation/media/uapi/dvb/frontend_f_close.rst b/Documentation/media/uapi/dvb/frontend_f_close.rst deleted file mode 100644 index af87c2a83719..000000000000 --- a/Documentation/media/uapi/dvb/frontend_f_close.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend_f_close: - -*************************** -Digital TV frontend close() -*************************** - -Name -==== - -fe-close - Close a frontend device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: int close( int fd ) - :name: dvb-fe-close - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <dvb-fe-open>`. - - -Description -=========== - -This system call closes a previously opened front-end device. After -closing a front-end device, its corresponding hardware might be powered -down automatically. - - -Return Value -============ - -On success 0 is returned. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -Generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/frontend_f_open.rst b/Documentation/media/uapi/dvb/frontend_f_open.rst deleted file mode 100644 index 6a46ec5acf7b..000000000000 --- a/Documentation/media/uapi/dvb/frontend_f_open.rst +++ /dev/null @@ -1,117 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend_f_open: - -*************************** -Digital TV frontend open() -*************************** - -Name -==== - -fe-open - Open a frontend device - - -Synopsis -======== - -.. code-block:: c - - #include <fcntl.h> - - -.. c:function:: int open( const char *device_name, int flags ) - :name: dvb-fe-open - -Arguments -========= - -``device_name`` - Device to be opened. - -``flags`` - Open flags. Access can either be ``O_RDWR`` or ``O_RDONLY``. - - Multiple opens are allowed with ``O_RDONLY``. In this mode, only - query and read ioctls are allowed. - - Only one open is allowed in ``O_RDWR``. In this mode, all ioctls are - allowed. - - When the ``O_NONBLOCK`` flag is given, the system calls may return - ``EAGAIN`` error code when no data is available or when the device - driver is temporarily busy. - - Other flags have no effect. - - -Description -=========== - -This system call opens a named frontend device -(``/dev/dvb/adapter?/frontend?``) for subsequent use. Usually the first -thing to do after a successful open is to find out the frontend type -with :ref:`FE_GET_INFO`. - -The device can be opened in read-only mode, which only allows monitoring -of device status and statistics, or read/write mode, which allows any -kind of use (e.g. performing tuning operations.) - -In a system with multiple front-ends, it is usually the case that -multiple devices cannot be open in read/write mode simultaneously. As -long as a front-end device is opened in read/write mode, other open() -calls in read/write mode will either fail or block, depending on whether -non-blocking or blocking mode was specified. A front-end device opened -in blocking mode can later be put into non-blocking mode (and vice -versa) using the F_SETFL command of the fcntl system call. This is a -standard system call, documented in the Linux manual page for fcntl. -When an open() call has succeeded, the device will be ready for use in -the specified mode. This implies that the corresponding hardware is -powered up, and that other front-ends may have been powered down to make -that possible. - - -Return Value -============ - -On success :ref:`open() <frontend_f_open>` returns the new file descriptor. -On error, -1 is returned, and the ``errno`` variable is set appropriately. - -Possible error codes are: - - -On success 0 is returned, and :c:type:`ca_slot_info` is filled. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - ``EPERM`` - - The caller has no permission to access the device. - - - - ``EBUSY`` - - The the device driver is already in use. - - - - ``EMFILE`` - - The process already has the maximum number of files open. - - - - ``ENFILE`` - - The limit on the total number of files open on the system has been - reached. - - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/frontend_fcalls.rst b/Documentation/media/uapi/dvb/frontend_fcalls.rst deleted file mode 100644 index 9b3586f538ea..000000000000 --- a/Documentation/media/uapi/dvb/frontend_fcalls.rst +++ /dev/null @@ -1,31 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend_fcalls: - -####################### -Frontend Function Calls -####################### - -.. toctree:: - :maxdepth: 1 - - frontend_f_open - frontend_f_close - fe-get-info - fe-read-status - fe-get-property - fe-diseqc-reset-overload - fe-diseqc-send-master-cmd - fe-diseqc-recv-slave-reply - fe-diseqc-send-burst - fe-set-tone - fe-set-voltage - fe-enable-high-lnb-voltage - fe-set-frontend-tune-mode diff --git a/Documentation/media/uapi/dvb/frontend_legacy_api.rst b/Documentation/media/uapi/dvb/frontend_legacy_api.rst deleted file mode 100644 index 1ea749d09ca2..000000000000 --- a/Documentation/media/uapi/dvb/frontend_legacy_api.rst +++ /dev/null @@ -1,45 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend_legacy_types: - -Frontend Legacy Data Types -========================== - - -.. toctree:: - :maxdepth: 1 - - fe-type-t - fe-bandwidth-t - dvb-frontend-parameters - dvb-frontend-event - - -.. _frontend_legacy_fcalls: - -Frontend Legacy Function Calls -============================== - -Those functions are defined at DVB version 3. The support is kept in the -kernel due to compatibility issues only. Their usage is strongly not -recommended - - -.. toctree:: - :maxdepth: 1 - - fe-read-ber - fe-read-snr - fe-read-signal-strength - fe-read-uncorrected-blocks - fe-set-frontend - fe-get-frontend - fe-get-event - fe-dishnetwork-send-legacy-cmd diff --git a/Documentation/media/uapi/dvb/frontend_legacy_dvbv3_api.rst b/Documentation/media/uapi/dvb/frontend_legacy_dvbv3_api.rst deleted file mode 100644 index 1567bc73855a..000000000000 --- a/Documentation/media/uapi/dvb/frontend_legacy_dvbv3_api.rst +++ /dev/null @@ -1,25 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _frontend_legacy_dvbv3_api: - -*********************************************** -Digital TV Frontend legacy API (a. k. a. DVBv3) -*********************************************** - -The usage of this API is deprecated, as it doesn't support all digital -TV standards, doesn't provide good statistics measurements and provides -incomplete information. This is kept only to support legacy -applications. - - -.. toctree:: - :maxdepth: 1 - - frontend_legacy_api diff --git a/Documentation/media/uapi/dvb/headers.rst b/Documentation/media/uapi/dvb/headers.rst deleted file mode 100644 index edeabd9e8e90..000000000000 --- a/Documentation/media/uapi/dvb/headers.rst +++ /dev/null @@ -1,30 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -**************************** -Digital TV uAPI header files -**************************** - -Digital TV uAPI headers -*********************** - -.. kernel-include:: $BUILDDIR/frontend.h.rst - -.. kernel-include:: $BUILDDIR/dmx.h.rst - -.. kernel-include:: $BUILDDIR/ca.h.rst - -.. kernel-include:: $BUILDDIR/net.h.rst - -Legacy uAPI -*********** - -.. kernel-include:: $BUILDDIR/audio.h.rst - -.. kernel-include:: $BUILDDIR/video.h.rst diff --git a/Documentation/media/uapi/dvb/intro.rst b/Documentation/media/uapi/dvb/intro.rst deleted file mode 100644 index f1384616ac4e..000000000000 --- a/Documentation/media/uapi/dvb/intro.rst +++ /dev/null @@ -1,190 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_introdution: - -************ -Introduction -************ - - -.. _requisites: - -What you need to know -===================== - -The reader of this document is required to have some knowledge in the -area of digital video broadcasting (Digital TV) and should be familiar with -part I of the MPEG2 specification ISO/IEC 13818 (aka ITU-T H.222), i.e -you should know what a program/transport stream (PS/TS) is and what is -meant by a packetized elementary stream (PES) or an I-frame. - -Various Digital TV standards documents are available for download at: - -- European standards (DVB): http://www.dvb.org and/or http://www.etsi.org. -- American standards (ATSC): https://www.atsc.org/standards/ -- Japanese standards (ISDB): http://www.dibeg.org/ - -It is also necessary to know how to access Linux devices and how to -use ioctl calls. This also includes the knowledge of C or C++. - - -.. _history: - -History -======= - -The first API for Digital TV cards we used at Convergence in late 1999 was an -extension of the Video4Linux API which was primarily developed for frame -grabber cards. As such it was not really well suited to be used for Digital -TV cards and their new features like recording MPEG streams and filtering -several section and PES data streams at the same time. - -In early 2000, Convergence was approached by Nokia with a proposal for a new -standard Linux Digital TV API. As a commitment to the development of terminals -based on open standards, Nokia and Convergence made it available to all -Linux developers and published it on https://linuxtv.org in September -2000. With the Linux driver for the Siemens/Hauppauge DVB PCI card, -Convergence provided a first implementation of the Linux Digital TV API. -Convergence was the maintainer of the Linux Digital TV API in the early -days. - -Now, the API is maintained by the LinuxTV community (i.e. you, the reader -of this document). The Linux Digital TV API is constantly reviewed and -improved together with the improvements at the subsystem's core at the -Kernel. - - -.. _overview: - -Overview -======== - - -.. _stb_components: - -.. kernel-figure:: dvbstb.svg - :alt: dvbstb.svg - :align: center - - Components of a Digital TV card/STB - -A Digital TV card or set-top-box (STB) usually consists of the -following main hardware components: - -Frontend consisting of tuner and digital TV demodulator - Here the raw signal reaches the digital TV hardware from a satellite dish or - antenna or directly from cable. The frontend down-converts and - demodulates this signal into an MPEG transport stream (TS). In case - of a satellite frontend, this includes a facility for satellite - equipment control (SEC), which allows control of LNB polarization, - multi feed switches or dish rotors. - -Conditional Access (CA) hardware like CI adapters and smartcard slots - The complete TS is passed through the CA hardware. Programs to which - the user has access (controlled by the smart card) are decoded in - real time and re-inserted into the TS. - - .. note:: - - Not every digital TV hardware provides conditional access hardware. - -Demultiplexer which filters the incoming Digital TV MPEG-TS stream - The demultiplexer splits the TS into its components like audio and - video streams. Besides usually several of such audio and video - streams it also contains data streams with information about the - programs offered in this or other streams of the same provider. - -Audio and video decoder - The main targets of the demultiplexer are audio and video - decoders. After decoding, they pass on the uncompressed audio and - video to the computer screen or to a TV set. - - .. note:: - - Modern hardware usually doesn't have a separate decoder hardware, as - such functionality can be provided by the main CPU, by the graphics - adapter of the system or by a signal processing hardware embedded on - a Systems on a Chip (SoC) integrated circuit. - - It may also not be needed for certain usages (e.g. for data-only - uses like “internet over satellite”). - -:ref:`stb_components` shows a crude schematic of the control and data -flow between those components. - - - -.. _dvb_devices: - -Linux Digital TV Devices -======================== - -The Linux Digital TV API lets you control these hardware components through -currently six Unix-style character devices for video, audio, frontend, -demux, CA and IP-over-DVB networking. The video and audio devices -control the MPEG2 decoder hardware, the frontend device the tuner and -the Digital TV demodulator. The demux device gives you control over the PES -and section filters of the hardware. If the hardware does not support -filtering these filters can be implemented in software. Finally, the CA -device controls all the conditional access capabilities of the hardware. -It can depend on the individual security requirements of the platform, -if and how many of the CA functions are made available to the -application through this device. - -All devices can be found in the ``/dev`` tree under ``/dev/dvb``. The -individual devices are called: - -- ``/dev/dvb/adapterN/audioM``, - -- ``/dev/dvb/adapterN/videoM``, - -- ``/dev/dvb/adapterN/frontendM``, - -- ``/dev/dvb/adapterN/netM``, - -- ``/dev/dvb/adapterN/demuxM``, - -- ``/dev/dvb/adapterN/dvrM``, - -- ``/dev/dvb/adapterN/caM``, - -where ``N`` enumerates the Digital TV cards in a system starting from 0, and -``M`` enumerates the devices of each type within each adapter, starting -from 0, too. We will omit the “``/dev/dvb/adapterN/``\ ” in the further -discussion of these devices. - -More details about the data structures and function calls of all the -devices are described in the following chapters. - - -.. _include_files: - -API include files -================= - -For each of the Digital TV devices a corresponding include file exists. The -Digital TV API include files should be included in application sources with a -partial path like: - - -.. code-block:: c - - #include <linux/dvb/ca.h> - - #include <linux/dvb/dmx.h> - - #include <linux/dvb/frontend.h> - - #include <linux/dvb/net.h> - - -To enable applications to support different API version, an additional -include file ``linux/dvb/version.h`` exists, which defines the constant -``DVB_API_VERSION``. This document describes ``DVB_API_VERSION 5.10``. diff --git a/Documentation/media/uapi/dvb/legacy_dvb_apis.rst b/Documentation/media/uapi/dvb/legacy_dvb_apis.rst deleted file mode 100644 index a43b4c36d935..000000000000 --- a/Documentation/media/uapi/dvb/legacy_dvb_apis.rst +++ /dev/null @@ -1,39 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _legacy_dvb_apis: - -*************************** -Digital TV Deprecated APIs -*************************** - -The APIs described here **should not** be used on new drivers or applications. - -The DVBv3 frontend API has issues with new delivery systems, including -DVB-S2, DVB-T2, ISDB, etc. - -There's just one driver for a very legacy hardware using the Digital TV -audio and video APIs. No modern drivers should use it. Instead, audio and -video should be using the V4L2 and ALSA APIs, and the pipelines should -be set via the Media Controller API. - -.. attention:: - - The APIs described here doesn't necessarily reflect the current - code implementation, as this section of the document was written - for DVB version 1, while the code reflects DVB version 3 - implementation. - - -.. toctree:: - :maxdepth: 1 - - frontend_legacy_dvbv3_api - video - audio diff --git a/Documentation/media/uapi/dvb/net-add-if.rst b/Documentation/media/uapi/dvb/net-add-if.rst deleted file mode 100644 index 1188641b453e..000000000000 --- a/Documentation/media/uapi/dvb/net-add-if.rst +++ /dev/null @@ -1,60 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _NET_ADD_IF: - -**************** -ioctl NET_ADD_IF -**************** - -Name -==== - -NET_ADD_IF - Creates a new network interface for a given Packet ID. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, NET_ADD_IF, struct dvb_net_if *net_if ) - :name: NET_ADD_IF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``net_if`` - pointer to struct :c:type:`dvb_net_if` - - -Description -=========== - -The NET_ADD_IF ioctl system call selects the Packet ID (PID) that -contains a TCP/IP traffic, the type of encapsulation to be used (MPE or -ULE) and the interface number for the new interface to be created. When -the system call successfully returns, a new virtual network interface is -created. - -The struct :c:type:`dvb_net_if`::ifnum field will be -filled with the number of the created interface. - -Return Value -============ - -On success 0 is returned, and :c:type:`ca_slot_info` is filled. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/net-get-if.rst b/Documentation/media/uapi/dvb/net-get-if.rst deleted file mode 100644 index 7c4ef4b9d6cc..000000000000 --- a/Documentation/media/uapi/dvb/net-get-if.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _NET_GET_IF: - -**************** -ioctl NET_GET_IF -**************** - -Name -==== - -NET_GET_IF - Read the configuration data of an interface created via - :ref:`NET_ADD_IF <net>`. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, NET_GET_IF, struct dvb_net_if *net_if ) - :name: NET_GET_IF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``net_if`` - pointer to struct :c:type:`dvb_net_if` - - -Description -=========== - -The NET_GET_IF ioctl uses the interface number given by the struct -:c:type:`dvb_net_if`::ifnum field and fills the content of -struct :c:type:`dvb_net_if` with the packet ID and -encapsulation type used on such interface. If the interface was not -created yet with :ref:`NET_ADD_IF <net>`, it will return -1 and fill -the ``errno`` with ``EINVAL`` error code. - - -Return Value -============ - -On success 0 is returned, and :c:type:`ca_slot_info` is filled. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/net-remove-if.rst b/Documentation/media/uapi/dvb/net-remove-if.rst deleted file mode 100644 index bf9a1602eeec..000000000000 --- a/Documentation/media/uapi/dvb/net-remove-if.rst +++ /dev/null @@ -1,55 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _NET_REMOVE_IF: - -******************* -ioctl NET_REMOVE_IF -******************* - -Name -==== - -NET_REMOVE_IF - Removes a network interface. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, NET_REMOVE_IF, int ifnum ) - :name: NET_REMOVE_IF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <frontend_f_open>`. - -``net_if`` - number of the interface to be removed - - -Description -=========== - -The NET_REMOVE_IF ioctl deletes an interface previously created via -:ref:`NET_ADD_IF <net>`. - - -Return Value -============ - -On success 0 is returned, and :c:type:`ca_slot_info` is filled. - -On error -1 is returned, and the ``errno`` variable is set -appropriately. - -The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/net-types.rst b/Documentation/media/uapi/dvb/net-types.rst deleted file mode 100644 index 9e16462a1ef4..000000000000 --- a/Documentation/media/uapi/dvb/net-types.rst +++ /dev/null @@ -1,16 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _net_types: - -************** -Net Data Types -************** - -.. kernel-doc:: include/uapi/linux/dvb/net.h diff --git a/Documentation/media/uapi/dvb/net.rst b/Documentation/media/uapi/dvb/net.rst deleted file mode 100644 index 833daa381968..000000000000 --- a/Documentation/media/uapi/dvb/net.rst +++ /dev/null @@ -1,48 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _net: - -###################### -Digital TV Network API -###################### - -The Digital TV net device controls the mapping of data packages that are part -of a transport stream to be mapped into a virtual network interface, -visible through the standard Linux network protocol stack. - -Currently, two encapsulations are supported: - -- `Multi Protocol Encapsulation (MPE) <http://en.wikipedia.org/wiki/Multiprotocol_Encapsulation>`__ - -- `Ultra Lightweight Encapsulation (ULE) <http://en.wikipedia.org/wiki/Unidirectional_Lightweight_Encapsulation>`__ - -In order to create the Linux virtual network interfaces, an application -needs to tell to the Kernel what are the PIDs and the encapsulation -types that are present on the transport stream. This is done through -``/dev/dvb/adapter?/net?`` device node. The data will be available via -virtual ``dvb?_?`` network interfaces, and will be controlled/routed via -the standard ip tools (like ip, route, netstat, ifconfig, etc). - -Data types and and ioctl definitions are defined via ``linux/dvb/net.h`` -header. - - -.. _net_fcalls: - -Digital TV net Function Calls -############################# - -.. toctree:: - :maxdepth: 1 - - net-types - net-add-if - net-remove-if - net-get-if diff --git a/Documentation/media/uapi/dvb/query-dvb-frontend-info.rst b/Documentation/media/uapi/dvb/query-dvb-frontend-info.rst deleted file mode 100644 index 9a6badc1d295..000000000000 --- a/Documentation/media/uapi/dvb/query-dvb-frontend-info.rst +++ /dev/null @@ -1,20 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _query-dvb-frontend-info: - -***************************** -Querying frontend information -***************************** - -Usually, the first thing to do when the frontend is opened is to check -the frontend capabilities. This is done using -:ref:`FE_GET_INFO`. This ioctl will enumerate the -Digital TV API version and other characteristics about the frontend, and can -be opened either in read only or read/write mode. diff --git a/Documentation/media/uapi/dvb/video-clear-buffer.rst b/Documentation/media/uapi/dvb/video-clear-buffer.rst deleted file mode 100644 index 5eb5546e8ce4..000000000000 --- a/Documentation/media/uapi/dvb/video-clear-buffer.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_CLEAR_BUFFER: - -================== -VIDEO_CLEAR_BUFFER -================== - -Name ----- - -VIDEO_CLEAR_BUFFER - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_CLEAR_BUFFER) - :name: VIDEO_CLEAR_BUFFER - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_CLEAR_BUFFER for this command. - - -Description ------------ - -This ioctl call clears all video buffers in the driver and in the -decoder hardware. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-command.rst b/Documentation/media/uapi/dvb/video-command.rst deleted file mode 100644 index 020b49645c6b..000000000000 --- a/Documentation/media/uapi/dvb/video-command.rst +++ /dev/null @@ -1,105 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_COMMAND: - -============= -VIDEO_COMMAND -============= - -Name ----- - -VIDEO_COMMAND - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(int fd, VIDEO_COMMAND, struct video_command *cmd) - :name: VIDEO_COMMAND - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_COMMAND for this command. - - - .. row 3 - - - struct video_command \*cmd - - - Commands the decoder. - - -Description ------------ - -This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders -this ioctl has been replaced by the -:ref:`VIDIOC_DECODER_CMD` ioctl. - -This ioctl commands the decoder. The ``video_command`` struct is a -subset of the ``v4l2_decoder_cmd`` struct, so refer to the -:ref:`VIDIOC_DECODER_CMD` documentation for -more information. - -.. c:type:: struct video_command - -.. code-block:: c - - /* The structure must be zeroed before use by the application - This ensures it can be extended safely in the future. */ - struct video_command { - __u32 cmd; - __u32 flags; - union { - struct { - __u64 pts; - } stop; - - struct { - /* 0 or 1000 specifies normal speed, - 1 specifies forward single stepping, - -1 specifies backward single stepping, - >1: playback at speed/1000 of the normal speed, - <-1: reverse playback at (-speed/1000) of the normal speed. */ - __s32 speed; - __u32 format; - } play; - - struct { - __u32 data[16]; - } raw; - }; - }; - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-continue.rst b/Documentation/media/uapi/dvb/video-continue.rst deleted file mode 100644 index 2ae2067dfba8..000000000000 --- a/Documentation/media/uapi/dvb/video-continue.rst +++ /dev/null @@ -1,66 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_CONTINUE: - -============== -VIDEO_CONTINUE -============== - -Name ----- - -VIDEO_CONTINUE - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_CONTINUE) - :name: VIDEO_CONTINUE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_CONTINUE for this command. - - -Description ------------ - -This ioctl is for Digital TV devices only. To control a V4L2 decoder use the -V4L2 :ref:`VIDIOC_DECODER_CMD` instead. - -This ioctl call restarts decoding and playing processes of the video -stream which was played before a call to VIDEO_FREEZE was made. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-fast-forward.rst b/Documentation/media/uapi/dvb/video-fast-forward.rst deleted file mode 100644 index 3f805f334ae1..000000000000 --- a/Documentation/media/uapi/dvb/video-fast-forward.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_FAST_FORWARD: - -================== -VIDEO_FAST_FORWARD -================== - -Name ----- - -VIDEO_FAST_FORWARD - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_FAST_FORWARD, int nFrames) - :name: VIDEO_FAST_FORWARD - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_FAST_FORWARD for this command. - - - .. row 3 - - - int nFrames - - - The number of frames to skip. - - -Description ------------ - -This ioctl call asks the Video Device to skip decoding of N number of -I-frames. This call can only be used if VIDEO_SOURCE_MEMORY is -selected. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EPERM`` - - - Mode VIDEO_SOURCE_MEMORY not selected. diff --git a/Documentation/media/uapi/dvb/video-fclose.rst b/Documentation/media/uapi/dvb/video-fclose.rst deleted file mode 100644 index 3b0285b96a3c..000000000000 --- a/Documentation/media/uapi/dvb/video-fclose.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _video_fclose: - -================= -dvb video close() -================= - -Name ----- - -dvb video close() - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int close(int fd) - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - -Description ------------ - -This system call closes a previously opened video device. - - -Return Value ------------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EBADF`` - - - fd is not a valid open file descriptor. diff --git a/Documentation/media/uapi/dvb/video-fopen.rst b/Documentation/media/uapi/dvb/video-fopen.rst deleted file mode 100644 index 7b2a8c750e6a..000000000000 --- a/Documentation/media/uapi/dvb/video-fopen.rst +++ /dev/null @@ -1,122 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _video_fopen: - -================ -dvb video open() -================ - -Name ----- - -dvb video open() - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int open(const char *deviceName, int flags) - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - const char \*deviceName - - - Name of specific video device. - - - .. row 2 - - - int flags - - - A bit-wise OR of the following flags: - - - .. row 3 - - - - - O_RDONLY read-only access - - - .. row 4 - - - - - O_RDWR read/write access - - - .. row 5 - - - - - O_NONBLOCK open in non-blocking mode - - - .. row 6 - - - - - (blocking mode is the default) - - -Description ------------ - -This system call opens a named video device (e.g. -/dev/dvb/adapter0/video0) for subsequent use. - -When an open() call has succeeded, the device will be ready for use. The -significance of blocking or non-blocking mode is described in the -documentation for functions where there is a difference. It does not -affect the semantics of the open() call itself. A device opened in -blocking mode can later be put into non-blocking mode (and vice versa) -using the F_SETFL command of the fcntl system call. This is a standard -system call, documented in the Linux manual page for fcntl. Only one -user can open the Video Device in O_RDWR mode. All other attempts to -open the device in this mode will fail, and an error-code will be -returned. If the Video Device is opened in O_RDONLY mode, the only -ioctl call that can be used is VIDEO_GET_STATUS. All other call will -return an error code. - - -Return Value ------------- - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``ENODEV`` - - - Device driver not loaded/available. - - - .. row 2 - - - ``EINTERNAL`` - - - Internal error. - - - .. row 3 - - - ``EBUSY`` - - - Device or resource busy. - - - .. row 4 - - - ``EINVAL`` - - - Invalid argument. diff --git a/Documentation/media/uapi/dvb/video-freeze.rst b/Documentation/media/uapi/dvb/video-freeze.rst deleted file mode 100644 index 6b31a4755d2c..000000000000 --- a/Documentation/media/uapi/dvb/video-freeze.rst +++ /dev/null @@ -1,70 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_FREEZE: - -============ -VIDEO_FREEZE -============ - -Name ----- - -VIDEO_FREEZE - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_FREEZE) - :name: VIDEO_FREEZE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_FREEZE for this command. - - -Description ------------ - -This ioctl is for Digital TV devices only. To control a V4L2 decoder use the -V4L2 :ref:`VIDIOC_DECODER_CMD` instead. - -This ioctl call suspends the live video stream being played. Decoding -and playing are frozen. It is then possible to restart the decoding and -playing process of the video stream using the VIDEO_CONTINUE command. -If VIDEO_SOURCE_MEMORY is selected in the ioctl call -VIDEO_SELECT_SOURCE, the Digital TV subsystem will not decode any more data -until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-fwrite.rst b/Documentation/media/uapi/dvb/video-fwrite.rst deleted file mode 100644 index eb35b79eb85c..000000000000 --- a/Documentation/media/uapi/dvb/video-fwrite.rst +++ /dev/null @@ -1,90 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _video_fwrite: - -================= -dvb video write() -================= - -Name ----- - -dvb video write() - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: size_t write(int fd, const void *buf, size_t count) - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - void \*buf - - - Pointer to the buffer containing the PES data. - - - .. row 3 - - - size_t count - - - Size of buf. - - -Description ------------ - -This system call can only be used if VIDEO_SOURCE_MEMORY is selected -in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in -PES format, unless the capability allows other formats. If O_NONBLOCK -is not specified the function will block until buffer space is -available. The amount of data to be transferred is implied by count. - - -Return Value ------------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EPERM`` - - - Mode VIDEO_SOURCE_MEMORY not selected. - - - .. row 2 - - - ``ENOMEM`` - - - Attempted to write more data than the internal buffer can hold. - - - .. row 3 - - - ``EBADF`` - - - fd is not a valid open file descriptor. diff --git a/Documentation/media/uapi/dvb/video-get-capabilities.rst b/Documentation/media/uapi/dvb/video-get-capabilities.rst deleted file mode 100644 index 971fdab70e15..000000000000 --- a/Documentation/media/uapi/dvb/video-get-capabilities.rst +++ /dev/null @@ -1,70 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_GET_CAPABILITIES: - -====================== -VIDEO_GET_CAPABILITIES -====================== - -Name ----- - -VIDEO_GET_CAPABILITIES - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_GET_CAPABILITIES, unsigned int *cap) - :name: VIDEO_GET_CAPABILITIES - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_GET_CAPABILITIES for this command. - - - .. row 3 - - - unsigned int \*cap - - - Pointer to a location where to store the capability information. - - -Description ------------ - -This ioctl call asks the video device about its decoding capabilities. -On success it returns and integer which has bits set according to the -defines in section ??. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-get-event.rst b/Documentation/media/uapi/dvb/video-get-event.rst deleted file mode 100644 index 7f03fbe3d3b0..000000000000 --- a/Documentation/media/uapi/dvb/video-get-event.rst +++ /dev/null @@ -1,114 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_GET_EVENT: - -=============== -VIDEO_GET_EVENT -=============== - -Name ----- - -VIDEO_GET_EVENT - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_GET_EVENT, struct video_event *ev) - :name: VIDEO_GET_EVENT - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_GET_EVENT for this command. - - - .. row 3 - - - struct video_event \*ev - - - Points to the location where the event, if any, is to be stored. - - -Description ------------ - -This ioctl is for Digital TV devices only. To get events from a V4L2 decoder -use the V4L2 :ref:`VIDIOC_DQEVENT` ioctl instead. - -This ioctl call returns an event of type video_event if available. If -an event is not available, the behavior depends on whether the device is -in blocking or non-blocking mode. In the latter case, the call fails -immediately with errno set to ``EWOULDBLOCK``. In the former case, the call -blocks until an event becomes available. The standard Linux poll() -and/or select() system calls can be used with the device file descriptor -to watch for new events. For select(), the file descriptor should be -included in the exceptfds argument, and for poll(), POLLPRI should be -specified as the wake-up condition. Read-only permissions are sufficient -for this ioctl call. - -.. c:type:: video_event - -.. code-block:: c - - struct video_event { - __s32 type; - #define VIDEO_EVENT_SIZE_CHANGED 1 - #define VIDEO_EVENT_FRAME_RATE_CHANGED 2 - #define VIDEO_EVENT_DECODER_STOPPED 3 - #define VIDEO_EVENT_VSYNC 4 - long timestamp; - union { - video_size_t size; - unsigned int frame_rate; /* in frames per 1000sec */ - unsigned char vsync_field; /* unknown/odd/even/progressive */ - } u; - }; - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EWOULDBLOCK`` - - - There is no event pending, and the device is in non-blocking mode. - - - .. row 2 - - - ``EOVERFLOW`` - - - Overflow in event queue - one or more events were lost. diff --git a/Documentation/media/uapi/dvb/video-get-frame-count.rst b/Documentation/media/uapi/dvb/video-get-frame-count.rst deleted file mode 100644 index ef35da7d4861..000000000000 --- a/Documentation/media/uapi/dvb/video-get-frame-count.rst +++ /dev/null @@ -1,74 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_GET_FRAME_COUNT: - -===================== -VIDEO_GET_FRAME_COUNT -===================== - -Name ----- - -VIDEO_GET_FRAME_COUNT - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(int fd, VIDEO_GET_FRAME_COUNT, __u64 *pts) - :name: VIDEO_GET_FRAME_COUNT - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_GET_FRAME_COUNT for this command. - - - .. row 3 - - - __u64 \*pts - - - Returns the number of frames displayed since the decoder was - started. - - -Description ------------ - -This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders -this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_FRAME`` -control. - -This ioctl call asks the Video Device to return the number of displayed -frames since the decoder was started. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-get-pts.rst b/Documentation/media/uapi/dvb/video-get-pts.rst deleted file mode 100644 index 86ceefff7834..000000000000 --- a/Documentation/media/uapi/dvb/video-get-pts.rst +++ /dev/null @@ -1,78 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_GET_PTS: - -============= -VIDEO_GET_PTS -============= - -Name ----- - -VIDEO_GET_PTS - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(int fd, VIDEO_GET_PTS, __u64 *pts) - :name: VIDEO_GET_PTS - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_GET_PTS for this command. - - - .. row 3 - - - __u64 \*pts - - - Returns the 33-bit timestamp as defined in ITU T-REC-H.222.0 / - ISO/IEC 13818-1. - - The PTS should belong to the currently played frame if possible, - but may also be a value close to it like the PTS of the last - decoded frame or the last PTS extracted by the PES parser. - - -Description ------------ - -This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders -this ioctl has been replaced by the ``V4L2_CID_MPEG_VIDEO_DEC_PTS`` -control. - -This ioctl call asks the Video Device to return the current PTS -timestamp. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-get-size.rst b/Documentation/media/uapi/dvb/video-get-size.rst deleted file mode 100644 index cc92189d31fd..000000000000 --- a/Documentation/media/uapi/dvb/video-get-size.rst +++ /dev/null @@ -1,78 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_GET_SIZE: - -============== -VIDEO_GET_SIZE -============== - -Name ----- - -VIDEO_GET_SIZE - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(int fd, VIDEO_GET_SIZE, video_size_t *size) - :name: VIDEO_GET_SIZE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_GET_SIZE for this command. - - - .. row 3 - - - video_size_t \*size - - - Returns the size and aspect ratio. - - -Description ------------ - -This ioctl returns the size and aspect ratio. - -.. c:type:: video_size_t - -.. code-block::c - - typedef struct { - int w; - int h; - video_format_t aspect_ratio; - } video_size_t; - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-get-status.rst b/Documentation/media/uapi/dvb/video-get-status.rst deleted file mode 100644 index 8bfcf8fc3e19..000000000000 --- a/Documentation/media/uapi/dvb/video-get-status.rst +++ /dev/null @@ -1,80 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_GET_STATUS: - -================ -VIDEO_GET_STATUS -================ - -Name ----- - -VIDEO_GET_STATUS - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_GET_STATUS, struct video_status *status) - :name: VIDEO_GET_STATUS - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_GET_STATUS for this command. - - - .. row 3 - - - struct video_status \*status - - - Returns the current status of the Video Device. - - -Description ------------ - -This ioctl call asks the Video Device to return the current status of -the device. - -.. c:type:: video_status - -.. code-block:: c - - struct video_status { - int video_blank; /* blank video on freeze? */ - video_play_state_t play_state; /* current state of playback */ - video_stream_source_t stream_source; /* current source (demux/memory) */ - video_format_t video_format; /* current aspect ratio of stream*/ - video_displayformat_t display_format;/* selected cropping mode */ - }; - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-play.rst b/Documentation/media/uapi/dvb/video-play.rst deleted file mode 100644 index fb3f4f168814..000000000000 --- a/Documentation/media/uapi/dvb/video-play.rst +++ /dev/null @@ -1,66 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_PLAY: - -========== -VIDEO_PLAY -========== - -Name ----- - -VIDEO_PLAY - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_PLAY) - :name: VIDEO_PLAY - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_PLAY for this command. - - -Description ------------ - -This ioctl is for Digital TV devices only. To control a V4L2 decoder use the -V4L2 :ref:`VIDIOC_DECODER_CMD` instead. - -This ioctl call asks the Video Device to start playing a video stream -from the selected source. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-select-source.rst b/Documentation/media/uapi/dvb/video-select-source.rst deleted file mode 100644 index 32cf025356dc..000000000000 --- a/Documentation/media/uapi/dvb/video-select-source.rst +++ /dev/null @@ -1,84 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_SELECT_SOURCE: - -=================== -VIDEO_SELECT_SOURCE -=================== - -Name ----- - -VIDEO_SELECT_SOURCE - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_SELECT_SOURCE, video_stream_source_t source) - :name: VIDEO_SELECT_SOURCE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_SELECT_SOURCE for this command. - - - .. row 3 - - - video_stream_source_t source - - - Indicates which source shall be used for the Video stream. - - -Description ------------ - -This ioctl is for Digital TV devices only. This ioctl was also supported by the -V4L2 ivtv driver, but that has been replaced by the ivtv-specific -``IVTV_IOC_PASSTHROUGH_MODE`` ioctl. - -This ioctl call informs the video device which source shall be used for -the input data. The possible sources are demux or memory. If memory is -selected, the data is fed to the video device through the write command. - -.. c:type:: video_stream_source_t - -.. code-block:: c - - typedef enum { - VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */ - VIDEO_SOURCE_MEMORY /* If this source is selected, the stream - comes from the user through the write - system call */ - } video_stream_source_t; - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-set-blank.rst b/Documentation/media/uapi/dvb/video-set-blank.rst deleted file mode 100644 index 901c3c80f167..000000000000 --- a/Documentation/media/uapi/dvb/video-set-blank.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_SET_BLANK: - -=============== -VIDEO_SET_BLANK -=============== - -Name ----- - -VIDEO_SET_BLANK - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_SET_BLANK, boolean mode) - :name: VIDEO_SET_BLANK - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_SET_BLANK for this command. - - - .. row 3 - - - boolean mode - - - TRUE: Blank screen when stop. - - - .. row 4 - - - - - FALSE: Show last decoded frame. - - -Description ------------ - -This ioctl call asks the Video Device to blank out the picture. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-set-display-format.rst b/Documentation/media/uapi/dvb/video-set-display-format.rst deleted file mode 100644 index ffdefa341207..000000000000 --- a/Documentation/media/uapi/dvb/video-set-display-format.rst +++ /dev/null @@ -1,69 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_SET_DISPLAY_FORMAT: - -======================== -VIDEO_SET_DISPLAY_FORMAT -======================== - -Name ----- - -VIDEO_SET_DISPLAY_FORMAT - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_SET_DISPLAY_FORMAT) - :name: VIDEO_SET_DISPLAY_FORMAT - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_SET_DISPLAY_FORMAT for this command. - - - .. row 3 - - - video_display_format_t format - - - Selects the video format to be used. - - -Description ------------ - -This ioctl call asks the Video Device to select the video format to be -applied by the MPEG chip on the video. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-set-format.rst b/Documentation/media/uapi/dvb/video-set-format.rst deleted file mode 100644 index 63e60214ab37..000000000000 --- a/Documentation/media/uapi/dvb/video-set-format.rst +++ /dev/null @@ -1,92 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_SET_FORMAT: - -================ -VIDEO_SET_FORMAT -================ - -Name ----- - -VIDEO_SET_FORMAT - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_SET_FORMAT, video_format_t format) - :name: VIDEO_SET_FORMAT - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_SET_FORMAT for this command. - - - .. row 3 - - - video_format_t format - - - video format of TV as defined in section ??. - - -Description ------------ - -This ioctl sets the screen format (aspect ratio) of the connected output -device (TV) so that the output of the decoder can be adjusted -accordingly. - -.. c:type:: video_format_t - -.. code-block:: c - - typedef enum { - VIDEO_FORMAT_4_3, /* Select 4:3 format */ - VIDEO_FORMAT_16_9, /* Select 16:9 format. */ - VIDEO_FORMAT_221_1 /* 2.21:1 */ - } video_format_t; - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EINVAL`` - - - format is not a valid video format. diff --git a/Documentation/media/uapi/dvb/video-set-streamtype.rst b/Documentation/media/uapi/dvb/video-set-streamtype.rst deleted file mode 100644 index 845486a6e049..000000000000 --- a/Documentation/media/uapi/dvb/video-set-streamtype.rst +++ /dev/null @@ -1,70 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_SET_STREAMTYPE: - -==================== -VIDEO_SET_STREAMTYPE -==================== - -Name ----- - -VIDEO_SET_STREAMTYPE - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_SET_STREAMTYPE, int type) - :name: VIDEO_SET_STREAMTYPE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_SET_STREAMTYPE for this command. - - - .. row 3 - - - int type - - - stream type - - -Description ------------ - -This ioctl tells the driver which kind of stream to expect being written -to it. If this call is not used the default of video PES is used. Some -drivers might not support this call and always expect PES. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-slowmotion.rst b/Documentation/media/uapi/dvb/video-slowmotion.rst deleted file mode 100644 index 32c934aaf2ba..000000000000 --- a/Documentation/media/uapi/dvb/video-slowmotion.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_SLOWMOTION: - -================ -VIDEO_SLOWMOTION -================ - -Name ----- - -VIDEO_SLOWMOTION - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_SLOWMOTION, int nFrames) - :name: VIDEO_SLOWMOTION - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_SLOWMOTION for this command. - - - .. row 3 - - - int nFrames - - - The number of times to repeat each frame. - - -Description ------------ - -This ioctl call asks the video device to repeat decoding frames N number -of times. This call can only be used if VIDEO_SOURCE_MEMORY is -selected. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``EPERM`` - - - Mode VIDEO_SOURCE_MEMORY not selected. diff --git a/Documentation/media/uapi/dvb/video-stillpicture.rst b/Documentation/media/uapi/dvb/video-stillpicture.rst deleted file mode 100644 index 58035a7630e6..000000000000 --- a/Documentation/media/uapi/dvb/video-stillpicture.rst +++ /dev/null @@ -1,70 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_STILLPICTURE: - -================== -VIDEO_STILLPICTURE -================== - -Name ----- - -VIDEO_STILLPICTURE - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_STILLPICTURE, struct video_still_picture *sp) - :name: VIDEO_STILLPICTURE - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_STILLPICTURE for this command. - - - .. row 3 - - - struct video_still_picture \*sp - - - Pointer to a location where an I-frame and size is stored. - - -Description ------------ - -This ioctl call asks the Video Device to display a still picture -(I-frame). The input data shall contain an I-frame. If the pointer is -NULL, then the current displayed still picture is blanked. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-stop.rst b/Documentation/media/uapi/dvb/video-stop.rst deleted file mode 100644 index 732ace05e34b..000000000000 --- a/Documentation/media/uapi/dvb/video-stop.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_STOP: - -========== -VIDEO_STOP -========== - -Name ----- - -VIDEO_STOP - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(fd, VIDEO_STOP, boolean mode) - :name: VIDEO_STOP - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_STOP for this command. - - - .. row 3 - - - Boolean mode - - - Indicates how the screen shall be handled. - - - .. row 4 - - - - - TRUE: Blank screen when stop. - - - .. row 5 - - - - - FALSE: Show last decoded frame. - - -Description ------------ - -This ioctl is for Digital TV devices only. To control a V4L2 decoder use the -V4L2 :ref:`VIDIOC_DECODER_CMD` instead. - -This ioctl call asks the Video Device to stop playing the current -stream. Depending on the input parameter, the screen can be blanked out -or displaying the last decoded frame. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video-try-command.rst b/Documentation/media/uapi/dvb/video-try-command.rst deleted file mode 100644 index 37ecf8e91eb8..000000000000 --- a/Documentation/media/uapi/dvb/video-try-command.rst +++ /dev/null @@ -1,75 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDEO_TRY_COMMAND: - -================= -VIDEO_TRY_COMMAND -================= - -Name ----- - -VIDEO_TRY_COMMAND - -.. attention:: This ioctl is deprecated. - -Synopsis --------- - -.. c:function:: int ioctl(int fd, VIDEO_TRY_COMMAND, struct video_command *cmd) - :name: VIDEO_TRY_COMMAND - - -Arguments ---------- - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - int fd - - - File descriptor returned by a previous call to open(). - - - .. row 2 - - - int request - - - Equals VIDEO_TRY_COMMAND for this command. - - - .. row 3 - - - struct video_command \*cmd - - - Try a decoder command. - - -Description ------------ - -This ioctl is obsolete. Do not use in new drivers. For V4L2 decoders -this ioctl has been replaced by the -:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` ioctl. - -This ioctl tries a decoder command. The ``video_command`` struct is a -subset of the ``v4l2_decoder_cmd`` struct, so refer to the -:ref:`VIDIOC_TRY_DECODER_CMD <VIDIOC_DECODER_CMD>` documentation -for more information. - - -Return Value ------------- - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/dvb/video.rst b/Documentation/media/uapi/dvb/video.rst deleted file mode 100644 index 6d72ed0e2b2d..000000000000 --- a/Documentation/media/uapi/dvb/video.rst +++ /dev/null @@ -1,43 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dvb_video: - -####################### -Digital TV Video Device -####################### - -The Digital TV video device controls the MPEG2 video decoder of the Digital -TV hardware. It can be accessed through **/dev/dvb/adapter0/video0**. Data -types and and ioctl definitions can be accessed by including -**linux/dvb/video.h** in your application. - -Note that the Digital TV video device only controls decoding of the MPEG video -stream, not its presentation on the TV or computer screen. On PCs this -is typically handled by an associated video4linux device, e.g. -**/dev/video**, which allows scaling and defining output windows. - -Some Digital TV cards don’t have their own MPEG decoder, which results in the -omission of the audio and video device as well as the video4linux -device. - -The ioctls that deal with SPUs (sub picture units) and navigation -packets are only supported on some MPEG decoders made for DVD playback. - -These ioctls were also used by V4L2 to control MPEG decoders implemented -in V4L2. The use of these ioctls for that purpose has been made obsolete -and proper V4L2 ioctls or controls have been created to replace that -functionality. - - -.. toctree:: - :maxdepth: 1 - - video_types - video_function_calls diff --git a/Documentation/media/uapi/dvb/video_function_calls.rst b/Documentation/media/uapi/dvb/video_function_calls.rst deleted file mode 100644 index 9e8e49e52b19..000000000000 --- a/Documentation/media/uapi/dvb/video_function_calls.rst +++ /dev/null @@ -1,42 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _video_function_calls: - -******************** -Video Function Calls -******************** - -.. toctree:: - :maxdepth: 1 - - video-fopen - video-fclose - video-fwrite - video-stop - video-play - video-freeze - video-continue - video-select-source - video-set-blank - video-get-status - video-get-frame-count - video-get-pts - video-get-event - video-command - video-try-command - video-get-size - video-set-display-format - video-stillpicture - video-fast-forward - video-slowmotion - video-get-capabilities - video-clear-buffer - video-set-streamtype - video-set-format diff --git a/Documentation/media/uapi/dvb/video_types.rst b/Documentation/media/uapi/dvb/video_types.rst deleted file mode 100644 index 2697400ccf62..000000000000 --- a/Documentation/media/uapi/dvb/video_types.rst +++ /dev/null @@ -1,255 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _video_types: - -**************** -Video Data Types -**************** - - -.. _video-format-t: - -video_format_t -============== - -The ``video_format_t`` data type defined by - - -.. code-block:: c - - typedef enum { - VIDEO_FORMAT_4_3, /* Select 4:3 format */ - VIDEO_FORMAT_16_9, /* Select 16:9 format. */ - VIDEO_FORMAT_221_1 /* 2.21:1 */ - } video_format_t; - -is used in the VIDEO_SET_FORMAT function (??) to tell the driver which -aspect ratio the output hardware (e.g. TV) has. It is also used in the -data structures video_status (??) returned by VIDEO_GET_STATUS (??) -and video_event (??) returned by VIDEO_GET_EVENT (??) which report -about the display format of the current video stream. - - -.. _video-displayformat-t: - -video_displayformat_t -===================== - -In case the display format of the video stream and of the display -hardware differ the application has to specify how to handle the -cropping of the picture. This can be done using the -VIDEO_SET_DISPLAY_FORMAT call (??) which accepts - - -.. code-block:: c - - typedef enum { - VIDEO_PAN_SCAN, /* use pan and scan format */ - VIDEO_LETTER_BOX, /* use letterbox format */ - VIDEO_CENTER_CUT_OUT /* use center cut out format */ - } video_displayformat_t; - -as argument. - - -.. _video-stream-source-t: - -video_stream_source_t -===================== - -The video stream source is set through the VIDEO_SELECT_SOURCE call -and can take the following values, depending on whether we are replaying -from an internal (demuxer) or external (user write) source. - - -.. code-block:: c - - typedef enum { - VIDEO_SOURCE_DEMUX, /* Select the demux as the main source */ - VIDEO_SOURCE_MEMORY /* If this source is selected, the stream - comes from the user through the write - system call */ - } video_stream_source_t; - -VIDEO_SOURCE_DEMUX selects the demultiplexer (fed either by the -frontend or the DVR device) as the source of the video stream. If -VIDEO_SOURCE_MEMORY is selected the stream comes from the application -through the **write()** system call. - - -.. _video-play-state-t: - -video_play_state_t -================== - -The following values can be returned by the VIDEO_GET_STATUS call -representing the state of video playback. - - -.. code-block:: c - - typedef enum { - VIDEO_STOPPED, /* Video is stopped */ - VIDEO_PLAYING, /* Video is currently playing */ - VIDEO_FREEZED /* Video is freezed */ - } video_play_state_t; - - -.. c:type:: video_command - -struct video_command -==================== - -The structure must be zeroed before use by the application This ensures -it can be extended safely in the future. - - -.. code-block:: c - - struct video_command { - __u32 cmd; - __u32 flags; - union { - struct { - __u64 pts; - } stop; - - struct { - /* 0 or 1000 specifies normal speed, - 1 specifies forward single stepping, - -1 specifies backward single stepping, - >>1: playback at speed/1000 of the normal speed, - <-1: reverse playback at (-speed/1000) of the normal speed. */ - __s32 speed; - __u32 format; - } play; - - struct { - __u32 data[16]; - } raw; - }; - }; - - -.. _video-size-t: - -video_size_t -============ - - -.. code-block:: c - - typedef struct { - int w; - int h; - video_format_t aspect_ratio; - } video_size_t; - - -.. c:type:: video_event - -struct video_event -================== - -The following is the structure of a video event as it is returned by the -VIDEO_GET_EVENT call. - - -.. code-block:: c - - struct video_event { - __s32 type; - #define VIDEO_EVENT_SIZE_CHANGED 1 - #define VIDEO_EVENT_FRAME_RATE_CHANGED 2 - #define VIDEO_EVENT_DECODER_STOPPED 3 - #define VIDEO_EVENT_VSYNC 4 - long timestamp; - union { - video_size_t size; - unsigned int frame_rate; /* in frames per 1000sec */ - unsigned char vsync_field; /* unknown/odd/even/progressive */ - } u; - }; - - -.. c:type:: video_status - -struct video_status -=================== - -The VIDEO_GET_STATUS call returns the following structure informing -about various states of the playback operation. - - -.. code-block:: c - - struct video_status { - int video_blank; /* blank video on freeze? */ - video_play_state_t play_state; /* current state of playback */ - video_stream_source_t stream_source; /* current source (demux/memory) */ - video_format_t video_format; /* current aspect ratio of stream */ - video_displayformat_t display_format;/* selected cropping mode */ - }; - -If video_blank is set video will be blanked out if the channel is -changed or if playback is stopped. Otherwise, the last picture will be -displayed. play_state indicates if the video is currently frozen, -stopped, or being played back. The stream_source corresponds to the -selected source for the video stream. It can come either from the -demultiplexer or from memory. The video_format indicates the aspect -ratio (one of 4:3 or 16:9) of the currently played video stream. -Finally, display_format corresponds to the selected cropping mode in -case the source video format is not the same as the format of the output -device. - - -.. c:type:: video_still_picture - -struct video_still_picture -========================== - -An I-frame displayed via the VIDEO_STILLPICTURE call is passed on -within the following structure. - - -.. code-block:: c - - /* pointer to and size of a single iframe in memory */ - struct video_still_picture { - char *iFrame; /* pointer to a single iframe in memory */ - int32_t size; - }; - - -.. _video_caps: - -video capabilities -================== - -A call to VIDEO_GET_CAPABILITIES returns an unsigned integer with the -following bits set according to the hardwares capabilities. - - -.. code-block:: c - - /* bit definitions for capabilities: */ - /* can the hardware decode MPEG1 and/or MPEG2? */ - #define VIDEO_CAP_MPEG1 1 - #define VIDEO_CAP_MPEG2 2 - /* can you send a system and/or program stream to video device? - (you still have to open the video and the audio device but only - send the stream to the video device) */ - #define VIDEO_CAP_SYS 4 - #define VIDEO_CAP_PROG 8 - /* can the driver also handle SPU, NAVI and CSS encoded data? - (CSS API is not present yet) */ - #define VIDEO_CAP_SPU 16 - #define VIDEO_CAP_NAVI 32 - #define VIDEO_CAP_CSS 64 diff --git a/Documentation/media/uapi/fdl-appendix.rst b/Documentation/media/uapi/fdl-appendix.rst deleted file mode 100644 index 9316b8617502..000000000000 --- a/Documentation/media/uapi/fdl-appendix.rst +++ /dev/null @@ -1,478 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _fdl: - -****************************** -GNU Free Documentation License -****************************** - - -.. _fdl-preamble: - -0. PREAMBLE -=========== - -The purpose of this License is to make a manual, textbook, or other -written document “free” in the sense of freedom: to assure everyone the -effective freedom to copy and redistribute it, with or without modifying -it, either commercially or noncommercially. Secondarily, this License -preserves for the author and publisher a way to get credit for their -work, while not being considered responsible for modifications made by -others. - -This License is a kind of “copyleft”, which means that derivative works -of the document must themselves be free in the same sense. It -complements the GNU General Public License, which is a copyleft license -designed for free software. - -We have designed this License in order to use it for manuals for free -software, because free software needs free documentation: a free program -should come with manuals providing the same freedoms that the software -does. But this License is not limited to software manuals; it can be -used for any textual work, regardless of subject matter or whether it is -published as a printed book. We recommend this License principally for -works whose purpose is instruction or reference. - - -.. _fdl-section1: - -1. APPLICABILITY AND DEFINITIONS -================================ - - -.. _fdl-document: - -This License applies to any manual or other work that contains a notice -placed by the copyright holder saying it can be distributed under the -terms of this License. The “Document”, below, refers to any such manual -or work. Any member of the public is a licensee, and is addressed as -“you”. - - -.. _fdl-modified: - -A “Modified Version” of the Document means any work containing the -Document or a portion of it, either copied verbatim, or with -modifications and/or translated into another language. - - -.. _fdl-secondary: - -A “Secondary Section” is a named appendix or a front-matter section of -the :ref:`Document <fdl-document>` that deals exclusively with the -relationship of the publishers or authors of the Document to the -Document's overall subject (or to related matters) and contains nothing -that could fall directly within that overall subject. (For example, if -the Document is in part a textbook of mathematics, a Secondary Section -may not explain any mathematics.) The relationship could be a matter of -historical connection with the subject or with related matters, or of -legal, commercial, philosophical, ethical or political position -regarding them. - - -.. _fdl-invariant: - -The “Invariant Sections” are certain -:ref:`Secondary Sections <fdl-secondary>` whose titles are designated, -as being those of Invariant Sections, in the notice that says that the -:ref:`Document <fdl-document>` is released under this License. - - -.. _fdl-cover-texts: - -The “Cover Texts” are certain short passages of text that are listed, as -Front-Cover Texts or Back-Cover Texts, in the notice that says that the -:ref:`Document <fdl-document>` is released under this License. - - -.. _fdl-transparent: - -A “Transparent” copy of the :ref:`Document <fdl-document>` means a -machine-readable copy, represented in a format whose specification is -available to the general public, whose contents can be viewed and edited -directly and straightforwardly with generic text editors or (for images -composed of pixels) generic paint programs or (for drawings) some widely -available drawing editor, and that is suitable for input to text -formatters or for automatic translation to a variety of formats suitable -for input to text formatters. A copy made in an otherwise Transparent -file format whose markup has been designed to thwart or discourage -subsequent modification by readers is not Transparent. A copy that is -not “Transparent” is called “Opaque”. - -Examples of suitable formats for Transparent copies include plain ASCII -without markup, Texinfo input format, LaTeX input format, SGML or XML -using a publicly available DTD, and standard-conforming simple HTML -designed for human modification. Opaque formats include PostScript, PDF, -proprietary formats that can be read and edited only by proprietary word -processors, SGML or XML for which the DTD and/or processing tools are -not generally available, and the machine-generated HTML produced by some -word processors for output purposes only. - - -.. _fdl-title-page: - -The “Title Page” means, for a printed book, the title page itself, plus -such following pages as are needed to hold, legibly, the material this -License requires to appear in the title page. For works in formats which -do not have any title page as such, “Title Page” means the text near the -most prominent appearance of the work's title, preceding the beginning -of the body of the text. - - -.. _fdl-section2: - -2. VERBATIM COPYING -=================== - -You may copy and distribute the :ref:`Document <fdl-document>` in any -medium, either commercially or noncommercially, provided that this -License, the copyright notices, and the license notice saying this -License applies to the Document are reproduced in all copies, and that -you add no other conditions whatsoever to those of this License. You may -not use technical measures to obstruct or control the reading or further -copying of the copies you make or distribute. However, you may accept -compensation in exchange for copies. If you distribute a large enough -number of copies you must also follow the conditions in -:ref:`section 3 <fdl-section3>`. - -You may also lend copies, under the same conditions stated above, and -you may publicly display copies. - - -.. _fdl-section3: - -3. COPYING IN QUANTITY -====================== - -If you publish printed copies of the :ref:`Document <fdl-document>` -numbering more than 100, and the Document's license notice requires -:ref:`Cover Texts <fdl-cover-texts>`, you must enclose the copies in -covers that carry, clearly and legibly, all these Cover Texts: -Front-Cover Texts on the front cover, and Back-Cover Texts on the back -cover. Both covers must also clearly and legibly identify you as the -publisher of these copies. The front cover must present the full title -with all words of the title equally prominent and visible. You may add -other material on the covers in addition. Copying with changes limited -to the covers, as long as they preserve the title of the -:ref:`Document <fdl-document>` and satisfy these conditions, can be -treated as verbatim copying in other respects. - -If the required texts for either cover are too voluminous to fit -legibly, you should put the first ones listed (as many as fit -reasonably) on the actual cover, and continue the rest onto adjacent -pages. - -If you publish or distribute :ref:`Opaque <fdl-transparent>` copies of -the :ref:`Document <fdl-document>` numbering more than 100, you must -either include a machine-readable :ref:`Transparent <fdl-transparent>` -copy along with each Opaque copy, or state in or with each Opaque copy a -publicly-accessible computer-network location containing a complete -Transparent copy of the Document, free of added material, which the -general network-using public has access to download anonymously at no -charge using public-standard network protocols. If you use the latter -option, you must take reasonably prudent steps, when you begin -distribution of Opaque copies in quantity, to ensure that this -Transparent copy will remain thus accessible at the stated location -until at least one year after the last time you distribute an Opaque -copy (directly or through your agents or retailers) of that edition to -the public. - -It is requested, but not required, that you contact the authors of the -:ref:`Document <fdl-document>` well before redistributing any large -number of copies, to give them a chance to provide you with an updated -version of the Document. - - -.. _fdl-section4: - -4. MODIFICATIONS -================ - -You may copy and distribute a :ref:`Modified Version <fdl-modified>` -of the :ref:`Document <fdl-document>` under the conditions of sections -:ref:`2 <fdl-section2>` and :ref:`3 <fdl-section3>` above, provided -that you release the Modified Version under precisely this License, with -the Modified Version filling the role of the Document, thus licensing -distribution and modification of the Modified Version to whoever -possesses a copy of it. In addition, you must do these things in the -Modified Version: - -- **A.** - Use in the :ref:`Title Page <fdl-title-page>` (and on the covers, - if any) a title distinct from that of the - :ref:`Document <fdl-document>`, and from those of previous versions - (which should, if there were any, be listed in the History section of - the Document). You may use the same title as a previous version if - the original publisher of that version gives permission. - -- **B.** - List on the :ref:`Title Page <fdl-title-page>`, as authors, one or - more persons or entities responsible for authorship of the - modifications in the :ref:`Modified Version <fdl-modified>`, - together with at least five of the principal authors of the - :ref:`Document <fdl-document>` (all of its principal authors, if it - has less than five). - -- **C.** - State on the :ref:`Title Page <fdl-title-page>` the name of the - publisher of the :ref:`Modified Version <fdl-modified>`, as the - publisher. - -- **D.** - Preserve all the copyright notices of the - :ref:`Document <fdl-document>`. - -- **E.** - Add an appropriate copyright notice for your modifications adjacent - to the other copyright notices. - -- **F.** - Include, immediately after the copyright notices, a license notice - giving the public permission to use the - :ref:`Modified Version <fdl-modified>` under the terms of this - License, in the form shown in the Addendum below. - -- **G.** - Preserve in that license notice the full lists of - :ref:`Invariant Sections <fdl-invariant>` and required - :ref:`Cover Texts <fdl-cover-texts>` given in the - :ref:`Document's <fdl-document>` license notice. - -- **H.** - Include an unaltered copy of this License. - -- **I.** - Preserve the section entitled “History”, and its title, and add to it - an item stating at least the title, year, new authors, and publisher - of the :ref:`Modified Version <fdl-modified>` as given on the - :ref:`Title Page <fdl-title-page>`. If there is no section entitled - “History” in the :ref:`Document <fdl-document>`, create one stating - the title, year, authors, and publisher of the Document as given on - its Title Page, then add an item describing the Modified Version as - stated in the previous sentence. - -- **J.** - Preserve the network location, if any, given in the - :ref:`Document <fdl-document>` for public access to a - :ref:`Transparent <fdl-transparent>` copy of the Document, and - likewise the network locations given in the Document for previous - versions it was based on. These may be placed in the “History” - section. You may omit a network location for a work that was - published at least four years before the Document itself, or if the - original publisher of the version it refers to gives permission. - -- **K.** - In any section entitled “Acknowledgements” or “Dedications”, preserve - the section's title, and preserve in the section all the substance - and tone of each of the contributor acknowledgements and/or - dedications given therein. - -- **L.** - Preserve all the :ref:`Invariant Sections <fdl-invariant>` of the - :ref:`Document <fdl-document>`, unaltered in their text and in - their titles. Section numbers or the equivalent are not considered - part of the section titles. - -- **M.** - Delete any section entitled “Endorsements”. Such a section may not be - included in the :ref:`Modified Version <fdl-modified>`. - -- **N.** - Do not retitle any existing section as “Endorsements” or to conflict - in title with any :ref:`Invariant Section <fdl-invariant>`. - -If the :ref:`Modified Version <fdl-modified>` includes new -front-matter sections or appendices that qualify as -:ref:`Secondary Sections <fdl-secondary>` and contain no material -copied from the Document, you may at your option designate some or all -of these sections as invariant. To do this, add their titles to the list -of :ref:`Invariant Sections <fdl-invariant>` in the Modified Version's -license notice. These titles must be distinct from any other section -titles. - -You may add a section entitled “Endorsements”, provided it contains -nothing but endorsements of your -:ref:`Modified Version <fdl-modified>` by various parties--for -example, statements of peer review or that the text has been approved by -an organization as the authoritative definition of a standard. - -You may add a passage of up to five words as a -:ref:`Front-Cover Text <fdl-cover-texts>`, and a passage of up to 25 -words as a :ref:`Back-Cover Text <fdl-cover-texts>`, to the end of the -list of :ref:`Cover Texts <fdl-cover-texts>` in the -:ref:`Modified Version <fdl-modified>`. Only one passage of -Front-Cover Text and one of Back-Cover Text may be added by (or through -arrangements made by) any one entity. If the -:ref:`Document <fdl-document>` already includes a cover text for the -same cover, previously added by you or by arrangement made by the same -entity you are acting on behalf of, you may not add another; but you may -replace the old one, on explicit permission from the previous publisher -that added the old one. - -The author(s) and publisher(s) of the :ref:`Document <fdl-document>` -do not by this License give permission to use their names for publicity -for or to assert or imply endorsement of any -:ref:`Modified Version <fdl-modified>`. - - -.. _fdl-section5: - -5. COMBINING DOCUMENTS -====================== - -You may combine the :ref:`Document <fdl-document>` with other -documents released under this License, under the terms defined in -:ref:`section 4 <fdl-section4>` above for modified versions, provided -that you include in the combination all of the -:ref:`Invariant Sections <fdl-invariant>` of all of the original -documents, unmodified, and list them all as Invariant Sections of your -combined work in its license notice. - -The combined work need only contain one copy of this License, and -multiple identical :ref:`Invariant Sections <fdl-invariant>` may be -replaced with a single copy. If there are multiple Invariant Sections -with the same name but different contents, make the title of each such -section unique by adding at the end of it, in parentheses, the name of -the original author or publisher of that section if known, or else a -unique number. Make the same adjustment to the section titles in the -list of Invariant Sections in the license notice of the combined work. - -In the combination, you must combine any sections entitled “History” in -the various original documents, forming one section entitled “History”; -likewise combine any sections entitled “Acknowledgements”, and any -sections entitled “Dedications”. You must delete all sections entitled -“Endorsements.” - - -.. _fdl-section6: - -6. COLLECTIONS OF DOCUMENTS -=========================== - -You may make a collection consisting of the -:ref:`Document <fdl-document>` and other documents released under this -License, and replace the individual copies of this License in the -various documents with a single copy that is included in the collection, -provided that you follow the rules of this License for verbatim copying -of each of the documents in all other respects. - -You may extract a single document from such a collection, and distribute -it individually under this License, provided you insert a copy of this -License into the extracted document, and follow this License in all -other respects regarding verbatim copying of that document. - - -.. _fdl-section7: - -7. AGGREGATION WITH INDEPENDENT WORKS -===================================== - -A compilation of the :ref:`Document <fdl-document>` or its derivatives -with other separate and independent documents or works, in or on a -volume of a storage or distribution medium, does not as a whole count as -a :ref:`Modified Version <fdl-modified>` of the Document, provided no -compilation copyright is claimed for the compilation. Such a compilation -is called an “aggregate”, and this License does not apply to the other -self-contained works thus compiled with the Document , on account of -their being thus compiled, if they are not themselves derivative works -of the Document. If the :ref:`Cover Text <fdl-cover-texts>` -requirement of :ref:`section 3 <fdl-section3>` is applicable to these -copies of the Document, then if the Document is less than one quarter of -the entire aggregate, the Document's Cover Texts may be placed on covers -that surround only the Document within the aggregate. Otherwise they -must appear on covers around the whole aggregate. - - -.. _fdl-section8: - -8. TRANSLATION -============== - -Translation is considered a kind of modification, so you may distribute -translations of the :ref:`Document <fdl-document>` under the terms of -:ref:`section 4 <fdl-section4>`. Replacing -:ref:`Invariant Sections <fdl-invariant>` with translations requires -special permission from their copyright holders, but you may include -translations of some or all Invariant Sections in addition to the -original versions of these Invariant Sections. You may include a -translation of this License provided that you also include the original -English version of this License. In case of a disagreement between the -translation and the original English version of this License, the -original English version will prevail. - - -.. _fdl-section9: - -9. TERMINATION -============== - -You may not copy, modify, sublicense, or distribute the -:ref:`Document <fdl-document>` except as expressly provided for under -this License. Any other attempt to copy, modify, sublicense or -distribute the Document is void, and will automatically terminate your -rights under this License. However, parties who have received copies, or -rights, from you under this License will not have their licenses -terminated so long as such parties remain in full compliance. - - -.. _fdl-section10: - -10. FUTURE REVISIONS OF THIS LICENSE -==================================== - -The `Free Software Foundation <http://www.gnu.org/fsf/fsf.html>`__ -may publish new, revised versions of the GNU Free Documentation License -from time to time. Such new versions will be similar in spirit to the -present version, but may differ in detail to address new problems or -concerns. See -`http://www.gnu.org/copyleft/ <http://www.gnu.org/copyleft>`__. - -Each version of the License is given a distinguishing version number. If -the :ref:`Document <fdl-document>` specifies that a particular -numbered version of this License “or any later version” applies to it, -you have the option of following the terms and conditions either of that -specified version or of any later version that has been published (not -as a draft) by the Free Software Foundation. If the Document does not -specify a version number of this License, you may choose any version -ever published (not as a draft) by the Free Software Foundation. - - -.. _fdl-using: - -Addendum -======== - -To use this License in a document you have written, include a copy of -the License in the document and put the following copyright and license -notices just after the title page: - - Copyright © YEAR YOUR NAME. - - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation; with the :ref:`Invariant Sections <fdl-invariant>` - being LIST THEIR TITLES, with the - :ref:`Front-Cover Texts <fdl-cover-texts>` being LIST, and with - the :ref:`Back-Cover Texts <fdl-cover-texts>` being LIST. A copy - of the license is included in the section entitled “GNU Free - Documentation License”. - -If you have no :ref:`Invariant Sections <fdl-invariant>`, write “with -no Invariant Sections” instead of saying which ones are invariant. If -you have no :ref:`Front-Cover Texts <fdl-cover-texts>`, write “no -Front-Cover Texts” instead of “Front-Cover Texts being LIST”; likewise -for :ref:`Back-Cover Texts <fdl-cover-texts>`. - -If your document contains nontrivial examples of program code, we -recommend releasing these examples in parallel under your choice of free -software license, such as the -`GNU General Public License <http://www.gnu.org/copyleft/gpl.html>`__, -to permit their use in free software. diff --git a/Documentation/media/uapi/gen-errors.rst b/Documentation/media/uapi/gen-errors.rst deleted file mode 100644 index 043c312dc06d..000000000000 --- a/Documentation/media/uapi/gen-errors.rst +++ /dev/null @@ -1,103 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _gen_errors: - -******************* -Generic Error Codes -******************* - - -.. _gen-errors: - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: Generic error codes - :header-rows: 0 - :stub-columns: 0 - :widths: 1 16 - - - - - ``EAGAIN`` (aka ``EWOULDBLOCK``) - - - The ioctl can't be handled because the device is in state where it - can't perform it. This could happen for example in case where - device is sleeping and ioctl is performed to query statistics. It - is also returned when the ioctl would need to wait for an event, - but the device was opened in non-blocking mode. - - - - ``EBADF`` - - - The file descriptor is not a valid. - - - - ``EBUSY`` - - - The ioctl can't be handled because the device is busy. This is - typically return while device is streaming, and an ioctl tried to - change something that would affect the stream, or would require - the usage of a hardware resource that was already allocated. The - ioctl must not be retried without performing another action to fix - the problem first (typically: stop the stream before retrying). - - - - ``EFAULT`` - - - There was a failure while copying data from/to userspace, probably - caused by an invalid pointer reference. - - - - ``EINVAL`` - - - One or more of the ioctl parameters are invalid or out of the - allowed range. This is a widely used error code. See the - individual ioctl requests for specific causes. - - - - ``ENODEV`` - - - Device not found or was removed. - - - - ``ENOMEM`` - - - There's not enough memory to handle the desired operation. - - - - ``ENOTTY`` - - - The ioctl is not supported by the driver, actually meaning that - the required functionality is not available, or the file - descriptor is not for a media device. - - - - ``ENOSPC`` - - - On USB devices, the stream ioctl's can return this error, meaning - that this request would overcommit the usb bandwidth reserved for - periodic transfers (up to 80% of the USB bandwidth). - - - - ``EPERM`` - - - Permission denied. Can be returned if the device needs write - permission, or some special capabilities is needed (e. g. root) - - - - ``EIO`` - - - I/O error. Typically used when there are problems communicating with - a hardware device. This could indicate broken or flaky hardware. - It's a 'Something is wrong, I give up!' type of error. - - - - ``ENXIO`` - - - No device corresponding to this device special file exists. - - -.. note:: - - #. This list is not exhaustive; ioctls may return other error codes. - Since errors may have side effects such as a driver reset, - applications should abort on unexpected errors, or otherwise - assume that the device is in a bad state. - - #. Request-specific error codes are listed in the individual - requests descriptions. diff --git a/Documentation/media/uapi/mediactl/media-controller-intro.rst b/Documentation/media/uapi/mediactl/media-controller-intro.rst deleted file mode 100644 index 281c559c2f3c..000000000000 --- a/Documentation/media/uapi/mediactl/media-controller-intro.rst +++ /dev/null @@ -1,40 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-controller-intro: - -Introduction -============ - -Media devices increasingly handle multiple related functions. Many USB -cameras include microphones, video capture hardware can also output -video, or SoC camera interfaces also perform memory-to-memory operations -similar to video codecs. - -Independent functions, even when implemented in the same hardware, can -be modelled as separate devices. A USB camera with a microphone will be -presented to userspace applications as V4L2 and ALSA capture devices. -The devices' relationships (when using a webcam, end-users shouldn't -have to manually select the associated USB microphone), while not made -available directly to applications by the drivers, can usually be -retrieved from sysfs. - -With more and more advanced SoC devices being introduced, the current -approach will not scale. Device topologies are getting increasingly -complex and can't always be represented by a tree structure. Hardware -blocks are shared between different functions, creating dependencies -between seemingly unrelated devices. - -Kernel abstraction APIs such as V4L2 and ALSA provide means for -applications to access hardware parameters. As newer hardware expose an -increasingly high number of those parameters, drivers need to guess what -applications really require based on limited information, thereby -implementing policies that belong to userspace. - -The media controller API aims at solving those problems. diff --git a/Documentation/media/uapi/mediactl/media-controller-model.rst b/Documentation/media/uapi/mediactl/media-controller-model.rst deleted file mode 100644 index b6d5902b556d..000000000000 --- a/Documentation/media/uapi/mediactl/media-controller-model.rst +++ /dev/null @@ -1,42 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-controller-model: - -Media device model -================== - -Discovering a device internal topology, and configuring it at runtime, -is one of the goals of the media controller API. To achieve this, -hardware devices and Linux Kernel interfaces are modelled as graph -objects on an oriented graph. The object types that constitute the graph -are: - -- An **entity** is a basic media hardware or software building block. - It can correspond to a large variety of logical blocks such as - physical hardware devices (CMOS sensor for instance), logical - hardware devices (a building block in a System-on-Chip image - processing pipeline), DMA channels or physical connectors. - -- An **interface** is a graph representation of a Linux Kernel - userspace API interface, like a device node or a sysfs file that - controls one or more entities in the graph. - -- A **pad** is a data connection endpoint through which an entity can - interact with other entities. Data (not restricted to video) produced - by an entity flows from the entity's output to one or more entity - inputs. Pads should not be confused with physical pins at chip - boundaries. - -- A **data link** is a point-to-point oriented connection between two - pads, either on the same entity or on different entities. Data flows - from a source pad to a sink pad. - -- An **interface link** is a point-to-point bidirectional control - connection between a Linux Kernel interface and an entity. diff --git a/Documentation/media/uapi/mediactl/media-controller.rst b/Documentation/media/uapi/mediactl/media-controller.rst deleted file mode 100644 index 6e624f690331..000000000000 --- a/Documentation/media/uapi/mediactl/media-controller.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. include:: <isonum.txt> - -.. _media_controller: - -############################## -Part IV - Media Controller API -############################## - -.. only:: html - - .. class:: toc-title - - Table of Contents - -.. toctree:: - :maxdepth: 5 - :numbered: - - media-controller-intro - media-controller-model - media-types - request-api - media-funcs - media-header - - -********************** -Revision and Copyright -********************** - -Authors: - -- Pinchart, Laurent <laurent.pinchart@ideasonboard.com> - - - Initial version. - -- Carvalho Chehab, Mauro <mchehab@kernel.org> - - - MEDIA_IOC_G_TOPOLOGY documentation and documentation improvements. - -**Copyright** |copy| 2010 : Laurent Pinchart - -**Copyright** |copy| 2015-2016 : Mauro Carvalho Chehab - -**************** -Revision History -**************** - -:revision: 1.1.0 / 2015-12-12 (*mcc*) - -:revision: 1.0.0 / 2010-11-10 (*lp*) - -Initial revision diff --git a/Documentation/media/uapi/mediactl/media-func-close.rst b/Documentation/media/uapi/mediactl/media-func-close.rst deleted file mode 100644 index 369ccd4dee56..000000000000 --- a/Documentation/media/uapi/mediactl/media-func-close.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-func-close: - -************* -media close() -************* - -Name -==== - -media-close - Close a media device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: int close( int fd ) - :name: mc-close - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <mc-open>`. - - -Description -=========== - -Closes the media device. Resources associated with the file descriptor -are freed. The device configuration remain unchanged. - - -Return Value -============ - -:ref:`close() <media-func-close>` returns 0 on success. On error, -1 is returned, and -``errno`` is set appropriately. Possible error codes are: - -EBADF - ``fd`` is not a valid open file descriptor. diff --git a/Documentation/media/uapi/mediactl/media-func-ioctl.rst b/Documentation/media/uapi/mediactl/media-func-ioctl.rst deleted file mode 100644 index 9a990d6480f5..000000000000 --- a/Documentation/media/uapi/mediactl/media-func-ioctl.rst +++ /dev/null @@ -1,74 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-func-ioctl: - -************* -media ioctl() -************* - -Name -==== - -media-ioctl - Control a media device - - -Synopsis -======== - -.. code-block:: c - - #include <sys/ioctl.h> - - -.. c:function:: int ioctl( int fd, int request, void *argp ) - :name: mc-ioctl - -Arguments -========= - -``fd`` - File descriptor returned by :c:func:`open() <mc-open>`. - -``request`` - Media ioctl request code as defined in the media.h header file, for - example MEDIA_IOC_SETUP_LINK. - -``argp`` - Pointer to a request-specific structure. - - -Description -=========== - -The :ref:`ioctl() <media-func-ioctl>` function manipulates media device -parameters. The argument ``fd`` must be an open file descriptor. - -The ioctl ``request`` code specifies the media function to be called. It -has encoded in it whether the argument is an input, output or read/write -parameter, and the size of the argument ``argp`` in bytes. - -Macros and structures definitions specifying media ioctl requests and -their parameters are located in the media.h header file. All media ioctl -requests, their respective function and parameters are specified in -:ref:`media-user-func`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -Request-specific error codes are listed in the individual requests -descriptions. - -When an ioctl that takes an output or read/write parameter fails, the -parameter remains unmodified. diff --git a/Documentation/media/uapi/mediactl/media-func-open.rst b/Documentation/media/uapi/mediactl/media-func-open.rst deleted file mode 100644 index cd2f840ddf73..000000000000 --- a/Documentation/media/uapi/mediactl/media-func-open.rst +++ /dev/null @@ -1,76 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-func-open: - -************ -media open() -************ - -Name -==== - -media-open - Open a media device - - -Synopsis -======== - -.. code-block:: c - - #include <fcntl.h> - - -.. c:function:: int open( const char *device_name, int flags ) - :name: mc-open - -Arguments -========= - -``device_name`` - Device to be opened. - -``flags`` - Open flags. Access mode must be either ``O_RDONLY`` or ``O_RDWR``. - Other flags have no effect. - - -Description -=========== - -To open a media device applications call :ref:`open() <media-func-open>` with the -desired device name. The function has no side effects; the device -configuration remain unchanged. - -When the device is opened in read-only mode, attempts to modify its -configuration will result in an error, and ``errno`` will be set to -EBADF. - - -Return Value -============ - -:ref:`open() <func-open>` returns the new file descriptor on success. On error, --1 is returned, and ``errno`` is set appropriately. Possible error codes -are: - -EACCES - The requested access to the file is not allowed. - -EMFILE - The process already has the maximum number of files open. - -ENFILE - The system limit on the total number of open files has been reached. - -ENOMEM - Insufficient kernel memory was available. - -ENXIO - No device corresponding to this device special file exists. diff --git a/Documentation/media/uapi/mediactl/media-funcs.rst b/Documentation/media/uapi/mediactl/media-funcs.rst deleted file mode 100644 index 87b65df8252a..000000000000 --- a/Documentation/media/uapi/mediactl/media-funcs.rst +++ /dev/null @@ -1,33 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-user-func: - -****************** -Function Reference -****************** - - -.. toctree:: - :maxdepth: 1 - - media-func-open - media-func-close - media-func-ioctl - media-ioc-device-info - media-ioc-g-topology - media-ioc-enum-entities - media-ioc-enum-links - media-ioc-setup-link - media-ioc-request-alloc - request-func-close - request-func-ioctl - request-func-poll - media-request-ioc-queue - media-request-ioc-reinit diff --git a/Documentation/media/uapi/mediactl/media-header.rst b/Documentation/media/uapi/mediactl/media-header.rst deleted file mode 100644 index 1cb7c88aeff0..000000000000 --- a/Documentation/media/uapi/mediactl/media-header.rst +++ /dev/null @@ -1,17 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_header: - -**************************** -Media Controller Header File -**************************** - -.. kernel-include:: $BUILDDIR/media.h.rst - diff --git a/Documentation/media/uapi/mediactl/media-ioc-device-info.rst b/Documentation/media/uapi/mediactl/media-ioc-device-info.rst deleted file mode 100644 index f8038cfb708c..000000000000 --- a/Documentation/media/uapi/mediactl/media-ioc-device-info.rst +++ /dev/null @@ -1,118 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_ioc_device_info: - -*************************** -ioctl MEDIA_IOC_DEVICE_INFO -*************************** - -Name -==== - -MEDIA_IOC_DEVICE_INFO - Query device information - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, MEDIA_IOC_DEVICE_INFO, struct media_device_info *argp ) - :name: MEDIA_IOC_DEVICE_INFO - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <media-func-open>`. - -``argp`` - Pointer to struct :c:type:`media_device_info`. - - -Description -=========== - -All media devices must support the ``MEDIA_IOC_DEVICE_INFO`` ioctl. To -query device information, applications call the ioctl with a pointer to -a struct :c:type:`media_device_info`. The driver -fills the structure and returns the information to the application. The -ioctl never fails. - - -.. c:type:: media_device_info - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct media_device_info - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - - * - char - - ``driver``\ [16] - - Name of the driver implementing the media API as a NUL-terminated - ASCII string. The driver version is stored in the - ``driver_version`` field. - - Driver specific applications can use this information to verify - the driver identity. It is also useful to work around known bugs, - or to identify drivers in error reports. - - * - char - - ``model``\ [32] - - Device model name as a NUL-terminated UTF-8 string. The device - version is stored in the ``device_version`` field and is not be - appended to the model name. - - * - char - - ``serial``\ [40] - - Serial number as a NUL-terminated ASCII string. - - * - char - - ``bus_info``\ [32] - - Location of the device in the system as a NUL-terminated ASCII - string. This includes the bus type name (PCI, USB, ...) and a - bus-specific identifier. - - * - __u32 - - ``media_version`` - - Media API version, formatted with the ``KERNEL_VERSION()`` macro. - - * - __u32 - - ``hw_revision`` - - Hardware device revision in a driver-specific format. - - * - __u32 - - ``driver_version`` - - Media device driver version, formatted with the - ``KERNEL_VERSION()`` macro. Together with the ``driver`` field - this identifies a particular driver. - - * - __u32 - - ``reserved``\ [31] - - Reserved for future extensions. Drivers and applications must set - this array to zero. - - -The ``serial`` and ``bus_info`` fields can be used to distinguish -between multiple instances of otherwise identical hardware. The serial -number takes precedence when provided and can be assumed to be unique. -If the serial number is an empty string, the ``bus_info`` field can be -used instead. The ``bus_info`` field is guaranteed to be unique, but can -vary across reboots or device unplug/replug. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/mediactl/media-ioc-enum-entities.rst b/Documentation/media/uapi/mediactl/media-ioc-enum-entities.rst deleted file mode 100644 index 33e2b110145c..000000000000 --- a/Documentation/media/uapi/mediactl/media-ioc-enum-entities.rst +++ /dev/null @@ -1,156 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_ioc_enum_entities: - -***************************** -ioctl MEDIA_IOC_ENUM_ENTITIES -***************************** - -Name -==== - -MEDIA_IOC_ENUM_ENTITIES - Enumerate entities and their properties - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, MEDIA_IOC_ENUM_ENTITIES, struct media_entity_desc *argp ) - :name: MEDIA_IOC_ENUM_ENTITIES - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <media-func-open>`. - -``argp`` - Pointer to struct :c:type:`media_entity_desc`. - - -Description -=========== - -To query the attributes of an entity, applications set the id field of a -struct :c:type:`media_entity_desc` structure and -call the MEDIA_IOC_ENUM_ENTITIES ioctl with a pointer to this -structure. The driver fills the rest of the structure or returns an -EINVAL error code when the id is invalid. - -.. _media-ent-id-flag-next: - -Entities can be enumerated by or'ing the id with the -``MEDIA_ENT_ID_FLAG_NEXT`` flag. The driver will return information -about the entity with the smallest id strictly larger than the requested -one ('next entity'), or the ``EINVAL`` error code if there is none. - -Entity IDs can be non-contiguous. Applications must *not* try to -enumerate entities by calling MEDIA_IOC_ENUM_ENTITIES with increasing -id's until they get an error. - - -.. c:type:: media_entity_desc - -.. tabularcolumns:: |p{1.5cm}|p{1.7cm}|p{1.6cm}|p{1.5cm}|p{11.2cm}| - -.. flat-table:: struct media_entity_desc - :header-rows: 0 - :stub-columns: 0 - :widths: 2 2 1 8 - - * - __u32 - - ``id`` - - - - Entity ID, set by the application. When the ID is or'ed with - ``MEDIA_ENT_ID_FLAG_NEXT``, the driver clears the flag and returns - the first entity with a larger ID. Do not expect that the ID will - always be the same for each instance of the device. In other words, - do not hardcode entity IDs in an application. - - * - char - - ``name``\ [32] - - - - Entity name as an UTF-8 NULL-terminated string. This name must be unique - within the media topology. - - * - __u32 - - ``type`` - - - - Entity type, see :ref:`media-entity-functions` for details. - - * - __u32 - - ``revision`` - - - - Entity revision. Always zero (obsolete) - - * - __u32 - - ``flags`` - - - - Entity flags, see :ref:`media-entity-flag` for details. - - * - __u32 - - ``group_id`` - - - - Entity group ID. Always zero (obsolete) - - * - __u16 - - ``pads`` - - - - Number of pads - - * - __u16 - - ``links`` - - - - Total number of outbound links. Inbound links are not counted in - this field. - - * - __u32 - - ``reserved[4]`` - - - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - * - union { - - (anonymous) - - * - struct - - ``dev`` - - - - Valid for (sub-)devices that create a single device node. - - * - - - __u32 - - ``major`` - - Device node major number. - - * - - - __u32 - - ``minor`` - - Device node minor number. - - * - __u8 - - ``raw``\ [184] - - - - - * - } - - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`media_entity_desc` ``id`` - references a non-existing entity. diff --git a/Documentation/media/uapi/mediactl/media-ioc-enum-links.rst b/Documentation/media/uapi/mediactl/media-ioc-enum-links.rst deleted file mode 100644 index b827ebc398f8..000000000000 --- a/Documentation/media/uapi/mediactl/media-ioc-enum-links.rst +++ /dev/null @@ -1,157 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_ioc_enum_links: - -************************** -ioctl MEDIA_IOC_ENUM_LINKS -************************** - -Name -==== - -MEDIA_IOC_ENUM_LINKS - Enumerate all pads and links for a given entity - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, MEDIA_IOC_ENUM_LINKS, struct media_links_enum *argp ) - :name: MEDIA_IOC_ENUM_LINKS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <media-func-open>`. - -``argp`` - Pointer to struct :c:type:`media_links_enum`. - - -Description -=========== - -To enumerate pads and/or links for a given entity, applications set the -entity field of a struct :c:type:`media_links_enum` -structure and initialize the struct -:c:type:`media_pad_desc` and struct -:c:type:`media_link_desc` structure arrays pointed by -the ``pads`` and ``links`` fields. They then call the -MEDIA_IOC_ENUM_LINKS ioctl with a pointer to this structure. - -If the ``pads`` field is not NULL, the driver fills the ``pads`` array -with information about the entity's pads. The array must have enough -room to store all the entity's pads. The number of pads can be retrieved -with :ref:`MEDIA_IOC_ENUM_ENTITIES`. - -If the ``links`` field is not NULL, the driver fills the ``links`` array -with information about the entity's outbound links. The array must have -enough room to store all the entity's outbound links. The number of -outbound links can be retrieved with :ref:`MEDIA_IOC_ENUM_ENTITIES`. - -Only forward links that originate at one of the entity's source pads are -returned during the enumeration process. - - -.. c:type:: media_links_enum - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct media_links_enum - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``entity`` - - Entity id, set by the application. - - * - struct :c:type:`media_pad_desc` - - \*\ ``pads`` - - Pointer to a pads array allocated by the application. Ignored if - NULL. - - * - struct :c:type:`media_link_desc` - - \*\ ``links`` - - Pointer to a links array allocated by the application. Ignored if - NULL. - - * - __u32 - - ``reserved[4]`` - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - -.. c:type:: media_pad_desc - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct media_pad_desc - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``entity`` - - ID of the entity this pad belongs to. - - * - __u16 - - ``index`` - - Pad index, starts at 0. - - * - __u32 - - ``flags`` - - Pad flags, see :ref:`media-pad-flag` for more details. - - * - __u32 - - ``reserved[2]`` - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - - -.. c:type:: media_link_desc - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct media_link_desc - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - struct :c:type:`media_pad_desc` - - ``source`` - - Pad at the origin of this link. - - * - struct :c:type:`media_pad_desc` - - ``sink`` - - Pad at the target of this link. - - * - __u32 - - ``flags`` - - Link flags, see :ref:`media-link-flag` for more details. - - * - __u32 - - ``reserved[2]`` - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`media_links_enum` ``id`` - references a non-existing entity. diff --git a/Documentation/media/uapi/mediactl/media-ioc-g-topology.rst b/Documentation/media/uapi/mediactl/media-ioc-g-topology.rst deleted file mode 100644 index 0a7d76ac8ded..000000000000 --- a/Documentation/media/uapi/mediactl/media-ioc-g-topology.rst +++ /dev/null @@ -1,307 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_ioc_g_topology: - -************************** -ioctl MEDIA_IOC_G_TOPOLOGY -************************** - -Name -==== - -MEDIA_IOC_G_TOPOLOGY - Enumerate the graph topology and graph element properties - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, MEDIA_IOC_G_TOPOLOGY, struct media_v2_topology *argp ) - :name: MEDIA_IOC_G_TOPOLOGY - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <media-func-open>`. - -``argp`` - Pointer to struct :c:type:`media_v2_topology`. - - -Description -=========== - -The typical usage of this ioctl is to call it twice. On the first call, -the structure defined at struct -:c:type:`media_v2_topology` should be zeroed. At -return, if no errors happen, this ioctl will return the -``topology_version`` and the total number of entities, interfaces, pads -and links. - -Before the second call, the userspace should allocate arrays to store -the graph elements that are desired, putting the pointers to them at the -ptr_entities, ptr_interfaces, ptr_links and/or ptr_pads, keeping the -other values untouched. - -If the ``topology_version`` remains the same, the ioctl should fill the -desired arrays with the media graph elements. - -.. tabularcolumns:: |p{1.6cm}|p{3.4cm}|p{12.5cm}| - -.. c:type:: media_v2_topology - -.. flat-table:: struct media_v2_topology - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 8 - - * - __u64 - - ``topology_version`` - - Version of the media graph topology. When the graph is created, - this field starts with zero. Every time a graph element is added - or removed, this field is incremented. - - * - __u32 - - ``num_entities`` - - Number of entities in the graph - - * - __u32 - - ``reserved1`` - - Applications and drivers shall set this to 0. - - * - __u64 - - ``ptr_entities`` - - A pointer to a memory area where the entities array will be - stored, converted to a 64-bits integer. It can be zero. if zero, - the ioctl won't store the entities. It will just update - ``num_entities`` - - * - __u32 - - ``num_interfaces`` - - Number of interfaces in the graph - - * - __u32 - - ``reserved2`` - - Applications and drivers shall set this to 0. - - * - __u64 - - ``ptr_interfaces`` - - A pointer to a memory area where the interfaces array will be - stored, converted to a 64-bits integer. It can be zero. if zero, - the ioctl won't store the interfaces. It will just update - ``num_interfaces`` - - * - __u32 - - ``num_pads`` - - Total number of pads in the graph - - * - __u32 - - ``reserved3`` - - Applications and drivers shall set this to 0. - - * - __u64 - - ``ptr_pads`` - - A pointer to a memory area where the pads array will be stored, - converted to a 64-bits integer. It can be zero. if zero, the ioctl - won't store the pads. It will just update ``num_pads`` - - * - __u32 - - ``num_links`` - - Total number of data and interface links in the graph - - * - __u32 - - ``reserved4`` - - Applications and drivers shall set this to 0. - - * - __u64 - - ``ptr_links`` - - A pointer to a memory area where the links array will be stored, - converted to a 64-bits integer. It can be zero. if zero, the ioctl - won't store the links. It will just update ``num_links`` - - -.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}| - -.. c:type:: media_v2_entity - -.. flat-table:: struct media_v2_entity - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 8 - - * - __u32 - - ``id`` - - Unique ID for the entity. Do not expect that the ID will - always be the same for each instance of the device. In other words, - do not hardcode entity IDs in an application. - - * - char - - ``name``\ [64] - - Entity name as an UTF-8 NULL-terminated string. This name must be unique - within the media topology. - - * - __u32 - - ``function`` - - Entity main function, see :ref:`media-entity-functions` for details. - - * - __u32 - - ``flags`` - - Entity flags, see :ref:`media-entity-flag` for details. - Only valid if ``MEDIA_V2_ENTITY_HAS_FLAGS(media_version)`` - returns true. The ``media_version`` is defined in struct - :c:type:`media_device_info` and can be retrieved using - :ref:`MEDIA_IOC_DEVICE_INFO`. - - * - __u32 - - ``reserved``\ [5] - - Reserved for future extensions. Drivers and applications must set - this array to zero. - - -.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}| - -.. c:type:: media_v2_interface - -.. flat-table:: struct media_v2_interface - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 8 - - * - __u32 - - ``id`` - - Unique ID for the interface. Do not expect that the ID will - always be the same for each instance of the device. In other words, - do not hardcode interface IDs in an application. - - * - __u32 - - ``intf_type`` - - Interface type, see :ref:`media-intf-type` for details. - - * - __u32 - - ``flags`` - - Interface flags. Currently unused. - - * - __u32 - - ``reserved``\ [9] - - Reserved for future extensions. Drivers and applications must set - this array to zero. - - * - struct media_v2_intf_devnode - - ``devnode`` - - Used only for device node interfaces. See - :c:type:`media_v2_intf_devnode` for details. - - -.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}| - -.. c:type:: media_v2_intf_devnode - -.. flat-table:: struct media_v2_intf_devnode - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 8 - - * - __u32 - - ``major`` - - Device node major number. - - * - __u32 - - ``minor`` - - Device node minor number. - -.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}| - -.. c:type:: media_v2_pad - -.. flat-table:: struct media_v2_pad - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 8 - - * - __u32 - - ``id`` - - Unique ID for the pad. Do not expect that the ID will - always be the same for each instance of the device. In other words, - do not hardcode pad IDs in an application. - - * - __u32 - - ``entity_id`` - - Unique ID for the entity where this pad belongs. - - * - __u32 - - ``flags`` - - Pad flags, see :ref:`media-pad-flag` for more details. - - * - __u32 - - ``index`` - - Pad index, starts at 0. Only valid if ``MEDIA_V2_PAD_HAS_INDEX(media_version)`` - returns true. The ``media_version`` is defined in struct - :c:type:`media_device_info` and can be retrieved using - :ref:`MEDIA_IOC_DEVICE_INFO`. - - * - __u32 - - ``reserved``\ [4] - - Reserved for future extensions. Drivers and applications must set - this array to zero. - - -.. tabularcolumns:: |p{1.6cm}|p{3.2cm}|p{12.7cm}| - -.. c:type:: media_v2_link - -.. flat-table:: struct media_v2_link - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 8 - - * - __u32 - - ``id`` - - Unique ID for the link. Do not expect that the ID will - always be the same for each instance of the device. In other words, - do not hardcode link IDs in an application. - - * - __u32 - - ``source_id`` - - On pad to pad links: unique ID for the source pad. - - On interface to entity links: unique ID for the interface. - - * - __u32 - - ``sink_id`` - - On pad to pad links: unique ID for the sink pad. - - On interface to entity links: unique ID for the entity. - - * - __u32 - - ``flags`` - - Link flags, see :ref:`media-link-flag` for more details. - - * - __u32 - - ``reserved``\ [6] - - Reserved for future extensions. Drivers and applications must set - this array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -ENOSPC - This is returned when either one or more of the num_entities, - num_interfaces, num_links or num_pads are non-zero and are - smaller than the actual number of elements inside the graph. This - may happen if the ``topology_version`` changed when compared to the - last time this ioctl was called. Userspace should usually free the - area for the pointers, zero the struct elements and call this ioctl - again. diff --git a/Documentation/media/uapi/mediactl/media-ioc-request-alloc.rst b/Documentation/media/uapi/mediactl/media-ioc-request-alloc.rst deleted file mode 100644 index 6d4ca4ada2e0..000000000000 --- a/Documentation/media/uapi/mediactl/media-ioc-request-alloc.rst +++ /dev/null @@ -1,90 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_ioc_request_alloc: - -***************************** -ioctl MEDIA_IOC_REQUEST_ALLOC -***************************** - -Name -==== - -MEDIA_IOC_REQUEST_ALLOC - Allocate a request - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, MEDIA_IOC_REQUEST_ALLOC, int *argp ) - :name: MEDIA_IOC_REQUEST_ALLOC - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <media-func-open>`. - -``argp`` - Pointer to an integer. - - -Description -=========== - -If the media device supports :ref:`requests <media-request-api>`, then -this ioctl can be used to allocate a request. If it is not supported, then -``errno`` is set to ``ENOTTY``. A request is accessed through a file descriptor -that is returned in ``*argp``. - -If the request was successfully allocated, then the request file descriptor -can be passed to the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, -:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, -:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and -:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctls. - -In addition, the request can be queued by calling -:ref:`MEDIA_REQUEST_IOC_QUEUE` and re-initialized by calling -:ref:`MEDIA_REQUEST_IOC_REINIT`. - -Finally, the file descriptor can be :ref:`polled <request-func-poll>` to wait -for the request to complete. - -The request will remain allocated until all the file descriptors associated -with it are closed by :ref:`close() <request-func-close>` and the driver no -longer uses the request internally. See also -:ref:`here <media-request-life-time>` for more information. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -ENOTTY - The driver has no support for requests. diff --git a/Documentation/media/uapi/mediactl/media-ioc-setup-link.rst b/Documentation/media/uapi/mediactl/media-ioc-setup-link.rst deleted file mode 100644 index ae39dbbe48a0..000000000000 --- a/Documentation/media/uapi/mediactl/media-ioc-setup-link.rst +++ /dev/null @@ -1,74 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_ioc_setup_link: - -************************** -ioctl MEDIA_IOC_SETUP_LINK -************************** - -Name -==== - -MEDIA_IOC_SETUP_LINK - Modify the properties of a link - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, MEDIA_IOC_SETUP_LINK, struct media_link_desc *argp ) - :name: MEDIA_IOC_SETUP_LINK - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <media-func-open>`. - -``argp`` - Pointer to struct :c:type:`media_link_desc`. - - -Description -=========== - -To change link properties applications fill a struct -:c:type:`media_link_desc` with link identification -information (source and sink pad) and the new requested link flags. They -then call the MEDIA_IOC_SETUP_LINK ioctl with a pointer to that -structure. - -The only configurable property is the ``ENABLED`` link flag to -enable/disable a link. Links marked with the ``IMMUTABLE`` link flag can -not be enabled or disabled. - -Link configuration has no side effect on other links. If an enabled link -at the sink pad prevents the link from being enabled, the driver returns -with an ``EBUSY`` error code. - -Only links marked with the ``DYNAMIC`` link flag can be enabled/disabled -while streaming media data. Attempting to enable or disable a streaming -non-dynamic link will return an ``EBUSY`` error code. - -If the specified link can't be found the driver returns with an ``EINVAL`` -error code. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`media_link_desc` references a - non-existing link, or the link is immutable and an attempt to modify - its configuration was made. diff --git a/Documentation/media/uapi/mediactl/media-request-ioc-queue.rst b/Documentation/media/uapi/mediactl/media-request-ioc-queue.rst deleted file mode 100644 index fc8458746d51..000000000000 --- a/Documentation/media/uapi/mediactl/media-request-ioc-queue.rst +++ /dev/null @@ -1,102 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_request_ioc_queue: - -***************************** -ioctl MEDIA_REQUEST_IOC_QUEUE -***************************** - -Name -==== - -MEDIA_REQUEST_IOC_QUEUE - Queue a request - - -Synopsis -======== - -.. c:function:: int ioctl( int request_fd, MEDIA_REQUEST_IOC_QUEUE ) - :name: MEDIA_REQUEST_IOC_QUEUE - - -Arguments -========= - -``request_fd`` - File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`. - - -Description -=========== - -If the media device supports :ref:`requests <media-request-api>`, then -this request ioctl can be used to queue a previously allocated request. - -If the request was successfully queued, then the file descriptor can be -:ref:`polled <request-func-poll>` to wait for the request to complete. - -If the request was already queued before, then ``EBUSY`` is returned. -Other errors can be returned if the contents of the request contained -invalid or inconsistent data, see the next section for a list of -common error codes. On error both the request and driver state are unchanged. - -Once a request is queued, then the driver is required to gracefully handle -errors that occur when the request is applied to the hardware. The -exception is the ``EIO`` error which signals a fatal error that requires -the application to stop streaming to reset the hardware state. - -It is not allowed to mix queuing requests with queuing buffers directly -(without a request). ``EBUSY`` will be returned if the first buffer was -queued directly and you next try to queue a request, or vice versa. - -A request must contain at least one buffer, otherwise this ioctl will -return an ``ENOENT`` error. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - The request was already queued or the application queued the first - buffer directly, but later attempted to use a request. It is not permitted - to mix the two APIs. -ENOENT - The request did not contain any buffers. All requests are required - to have at least one buffer. This can also be returned if some required - configuration is missing in the request. -ENOMEM - Out of memory when allocating internal data structures for this - request. -EINVAL - The request has invalid data. -EIO - The hardware is in a bad state. To recover, the application needs to - stop streaming to reset the hardware state and then try to restart - streaming. diff --git a/Documentation/media/uapi/mediactl/media-request-ioc-reinit.rst b/Documentation/media/uapi/mediactl/media-request-ioc-reinit.rst deleted file mode 100644 index 61381e87665a..000000000000 --- a/Documentation/media/uapi/mediactl/media-request-ioc-reinit.rst +++ /dev/null @@ -1,75 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _media_request_ioc_reinit: - -****************************** -ioctl MEDIA_REQUEST_IOC_REINIT -****************************** - -Name -==== - -MEDIA_REQUEST_IOC_REINIT - Re-initialize a request - - -Synopsis -======== - -.. c:function:: int ioctl( int request_fd, MEDIA_REQUEST_IOC_REINIT ) - :name: MEDIA_REQUEST_IOC_REINIT - - -Arguments -========= - -``request_fd`` - File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`. - -Description -=========== - -If the media device supports :ref:`requests <media-request-api>`, then -this request ioctl can be used to re-initialize a previously allocated -request. - -Re-initializing a request will clear any existing data from the request. -This avoids having to :ref:`close() <request-func-close>` a completed -request and allocate a new request. Instead the completed request can just -be re-initialized and it is ready to be used again. - -A request can only be re-initialized if it either has not been queued -yet, or if it was queued and completed. Otherwise it will set ``errno`` -to ``EBUSY``. No other error codes can be returned. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. - -EBUSY - The request is queued but not yet completed. diff --git a/Documentation/media/uapi/mediactl/media-types.rst b/Documentation/media/uapi/mediactl/media-types.rst deleted file mode 100644 index 3af6a414b501..000000000000 --- a/Documentation/media/uapi/mediactl/media-types.rst +++ /dev/null @@ -1,425 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-controller-types: - -Types and flags used to represent the media graph elements -========================================================== - -.. tabularcolumns:: |p{8.2cm}|p{10.3cm}| - -.. _media-entity-functions: -.. _MEDIA-ENT-F-UNKNOWN: -.. _MEDIA-ENT-F-V4L2-SUBDEV-UNKNOWN: -.. _MEDIA-ENT-F-IO-V4L: -.. _MEDIA-ENT-F-IO-VBI: -.. _MEDIA-ENT-F-IO-SWRADIO: -.. _MEDIA-ENT-F-IO-DTV: -.. _MEDIA-ENT-F-DTV-DEMOD: -.. _MEDIA-ENT-F-TS-DEMUX: -.. _MEDIA-ENT-F-DTV-CA: -.. _MEDIA-ENT-F-DTV-NET-DECAP: -.. _MEDIA-ENT-F-CONN-RF: -.. _MEDIA-ENT-F-CONN-SVIDEO: -.. _MEDIA-ENT-F-CONN-COMPOSITE: -.. _MEDIA-ENT-F-CAM-SENSOR: -.. _MEDIA-ENT-F-FLASH: -.. _MEDIA-ENT-F-LENS: -.. _MEDIA-ENT-F-ATV-DECODER: -.. _MEDIA-ENT-F-TUNER: -.. _MEDIA-ENT-F-IF-VID-DECODER: -.. _MEDIA-ENT-F-IF-AUD-DECODER: -.. _MEDIA-ENT-F-AUDIO-CAPTURE: -.. _MEDIA-ENT-F-AUDIO-PLAYBACK: -.. _MEDIA-ENT-F-AUDIO-MIXER: -.. _MEDIA-ENT-F-PROC-VIDEO-COMPOSER: -.. _MEDIA-ENT-F-PROC-VIDEO-PIXEL-FORMATTER: -.. _MEDIA-ENT-F-PROC-VIDEO-PIXEL-ENC-CONV: -.. _MEDIA-ENT-F-PROC-VIDEO-LUT: -.. _MEDIA-ENT-F-PROC-VIDEO-SCALER: -.. _MEDIA-ENT-F-PROC-VIDEO-STATISTICS: -.. _MEDIA-ENT-F-PROC-VIDEO-ENCODER: -.. _MEDIA-ENT-F-PROC-VIDEO-DECODER: -.. _MEDIA-ENT-F-VID-MUX: -.. _MEDIA-ENT-F-VID-IF-BRIDGE: -.. _MEDIA-ENT-F-DV-DECODER: -.. _MEDIA-ENT-F-DV-ENCODER: - -.. cssclass:: longtable - -.. flat-table:: Media entity functions - :header-rows: 0 - :stub-columns: 0 - - * - ``MEDIA_ENT_F_UNKNOWN`` and - ``MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN`` - - Unknown entity. That generally indicates that a driver didn't - initialize properly the entity, which is a Kernel bug - - * - ``MEDIA_ENT_F_IO_V4L`` - - Data streaming input and/or output entity. - - * - ``MEDIA_ENT_F_IO_VBI`` - - V4L VBI streaming input or output entity - - * - ``MEDIA_ENT_F_IO_SWRADIO`` - - V4L Software Digital Radio (SDR) streaming input or output entity - - * - ``MEDIA_ENT_F_IO_DTV`` - - DVB Digital TV streaming input or output entity - - * - ``MEDIA_ENT_F_DTV_DEMOD`` - - Digital TV demodulator entity. - - * - ``MEDIA_ENT_F_TS_DEMUX`` - - MPEG Transport stream demux entity. Could be implemented on - hardware or in Kernelspace by the Linux DVB subsystem. - - * - ``MEDIA_ENT_F_DTV_CA`` - - Digital TV Conditional Access module (CAM) entity - - * - ``MEDIA_ENT_F_DTV_NET_DECAP`` - - Digital TV network ULE/MLE desencapsulation entity. Could be - implemented on hardware or in Kernelspace - - * - ``MEDIA_ENT_F_CONN_RF`` - - Connector for a Radio Frequency (RF) signal. - - * - ``MEDIA_ENT_F_CONN_SVIDEO`` - - Connector for a S-Video signal. - - * - ``MEDIA_ENT_F_CONN_COMPOSITE`` - - Connector for a RGB composite signal. - - * - ``MEDIA_ENT_F_CAM_SENSOR`` - - Camera video sensor entity. - - * - ``MEDIA_ENT_F_FLASH`` - - Flash controller entity. - - * - ``MEDIA_ENT_F_LENS`` - - Lens controller entity. - - * - ``MEDIA_ENT_F_ATV_DECODER`` - - Analog video decoder, the basic function of the video decoder is - to accept analogue video from a wide variety of sources such as - broadcast, DVD players, cameras and video cassette recorders, in - either NTSC, PAL, SECAM or HD format, separating the stream into - its component parts, luminance and chrominance, and output it in - some digital video standard, with appropriate timing signals. - - * - ``MEDIA_ENT_F_TUNER`` - - Digital TV, analog TV, radio and/or software radio tuner, with - consists on a PLL tuning stage that converts radio frequency (RF) - signal into an Intermediate Frequency (IF). Modern tuners have - internally IF-PLL decoders for audio and video, but older models - have those stages implemented on separate entities. - - * - ``MEDIA_ENT_F_IF_VID_DECODER`` - - IF-PLL video decoder. It receives the IF from a PLL and decodes - the analog TV video signal. This is commonly found on some very - old analog tuners, like Philips MK3 designs. They all contain a - tda9887 (or some software compatible similar chip, like tda9885). - Those devices use a different I2C address than the tuner PLL. - - * - ``MEDIA_ENT_F_IF_AUD_DECODER`` - - IF-PLL sound decoder. It receives the IF from a PLL and decodes - the analog TV audio signal. This is commonly found on some very - old analog hardware, like Micronas msp3400, Philips tda9840, - tda985x, etc. Those devices use a different I2C address than the - tuner PLL and should be controlled together with the IF-PLL video - decoder. - - * - ``MEDIA_ENT_F_AUDIO_CAPTURE`` - - Audio Capture Function Entity. - - * - ``MEDIA_ENT_F_AUDIO_PLAYBACK`` - - Audio Playback Function Entity. - - * - ``MEDIA_ENT_F_AUDIO_MIXER`` - - Audio Mixer Function Entity. - - * - ``MEDIA_ENT_F_PROC_VIDEO_COMPOSER`` - - Video composer (blender). An entity capable of video - composing must have at least two sink pads and one source - pad, and composes input video frames onto output video - frames. Composition can be performed using alpha blending, - color keying, raster operations (ROP), stitching or any other - means. - - * - ``MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER`` - - Video pixel formatter. An entity capable of pixel formatting - must have at least one sink pad and one source pad. Read - pixel formatters read pixels from memory and perform a subset - of unpacking, cropping, color keying, alpha multiplication - and pixel encoding conversion. Write pixel formatters perform - a subset of dithering, pixel encoding conversion and packing - and write pixels to memory. - - * - ``MEDIA_ENT_F_PROC_VIDEO_PIXEL_ENC_CONV`` - - Video pixel encoding converter. An entity capable of pixel - encoding conversion must have at least one sink pad and one - source pad, and convert the encoding of pixels received on - its sink pad(s) to a different encoding output on its source - pad(s). Pixel encoding conversion includes but isn't limited - to RGB to/from HSV, RGB to/from YUV and CFA (Bayer) to RGB - conversions. - - * - ``MEDIA_ENT_F_PROC_VIDEO_LUT`` - - Video look-up table. An entity capable of video lookup table - processing must have one sink pad and one source pad. It uses - the values of the pixels received on its sink pad to look up - entries in internal tables and output them on its source pad. - The lookup processing can be performed on all components - separately or combine them for multi-dimensional table - lookups. - - * - ``MEDIA_ENT_F_PROC_VIDEO_SCALER`` - - Video scaler. An entity capable of video scaling must have - at least one sink pad and one source pad, and scale the - video frame(s) received on its sink pad(s) to a different - resolution output on its source pad(s). The range of - supported scaling ratios is entity-specific and can differ - between the horizontal and vertical directions (in particular - scaling can be supported in one direction only). Binning and - sub-sampling (occasionally also referred to as skipping) are - considered as scaling. - - * - ``MEDIA_ENT_F_PROC_VIDEO_STATISTICS`` - - Video statistics computation (histogram, 3A, etc.). An entity - capable of statistics computation must have one sink pad and - one source pad. It computes statistics over the frames - received on its sink pad and outputs the statistics data on - its source pad. - - * - ``MEDIA_ENT_F_PROC_VIDEO_ENCODER`` - - Video (MPEG, HEVC, VPx, etc.) encoder. An entity capable of - compressing video frames. Must have one sink pad and at least - one source pad. - - * - ``MEDIA_ENT_F_PROC_VIDEO_DECODER`` - - Video (MPEG, HEVC, VPx, etc.) decoder. An entity capable of - decompressing a compressed video stream into uncompressed video - frames. Must have one sink pad and at least one source pad. - - * - ``MEDIA_ENT_F_VID_MUX`` - - Video multiplexer. An entity capable of multiplexing must have at - least two sink pads and one source pad, and must pass the video - frame(s) received from the active sink pad to the source pad. - - * - ``MEDIA_ENT_F_VID_IF_BRIDGE`` - - Video interface bridge. A video interface bridge entity must have at - least one sink pad and at least one source pad. It receives video - frames on its sink pad from an input video bus of one type (HDMI, eDP, - MIPI CSI-2, etc.), and outputs them on its source pad to an output - video bus of another type (eDP, MIPI CSI-2, parallel, etc.). - - * - ``MEDIA_ENT_F_DV_DECODER`` - - Digital video decoder. The basic function of the video decoder is - to accept digital video from a wide variety of sources - and output it in some digital video standard, with appropriate - timing signals. - - * - ``MEDIA_ENT_F_DV_ENCODER`` - - Digital video encoder. The basic function of the video encoder is - to accept digital video from some digital video standard with - appropriate timing signals (usually a parallel video bus with sync - signals) and output this to a digital video output connector such - as HDMI or DisplayPort. - -.. tabularcolumns:: |p{5.5cm}|p{12.0cm}| - -.. _media-entity-flag: -.. _MEDIA-ENT-FL-DEFAULT: -.. _MEDIA-ENT-FL-CONNECTOR: - -.. flat-table:: Media entity flags - :header-rows: 0 - :stub-columns: 0 - - * - ``MEDIA_ENT_FL_DEFAULT`` - - Default entity for its type. Used to discover the default audio, - VBI and video devices, the default camera sensor, etc. - - * - ``MEDIA_ENT_FL_CONNECTOR`` - - The entity represents a connector. - - -.. tabularcolumns:: |p{6.5cm}|p{6.0cm}|p{5.0cm}| - -.. _media-intf-type: -.. _MEDIA-INTF-T-DVB-FE: -.. _MEDIA-INTF-T-DVB-DEMUX: -.. _MEDIA-INTF-T-DVB-DVR: -.. _MEDIA-INTF-T-DVB-CA: -.. _MEDIA-INTF-T-DVB-NET: -.. _MEDIA-INTF-T-V4L-VIDEO: -.. _MEDIA-INTF-T-V4L-VBI: -.. _MEDIA-INTF-T-V4L-RADIO: -.. _MEDIA-INTF-T-V4L-SUBDEV: -.. _MEDIA-INTF-T-V4L-SWRADIO: -.. _MEDIA-INTF-T-V4L-TOUCH: -.. _MEDIA-INTF-T-ALSA-PCM-CAPTURE: -.. _MEDIA-INTF-T-ALSA-PCM-PLAYBACK: -.. _MEDIA-INTF-T-ALSA-CONTROL: -.. _MEDIA-INTF-T-ALSA-COMPRESS: -.. _MEDIA-INTF-T-ALSA-RAWMIDI: -.. _MEDIA-INTF-T-ALSA-HWDEP: -.. _MEDIA-INTF-T-ALSA-SEQUENCER: -.. _MEDIA-INTF-T-ALSA-TIMER: - -.. flat-table:: Media interface types - :header-rows: 0 - :stub-columns: 0 - - * - ``MEDIA_INTF_T_DVB_FE`` - - Device node interface for the Digital TV frontend - - typically, /dev/dvb/adapter?/frontend? - - * - ``MEDIA_INTF_T_DVB_DEMUX`` - - Device node interface for the Digital TV demux - - typically, /dev/dvb/adapter?/demux? - - * - ``MEDIA_INTF_T_DVB_DVR`` - - Device node interface for the Digital TV DVR - - typically, /dev/dvb/adapter?/dvr? - - * - ``MEDIA_INTF_T_DVB_CA`` - - Device node interface for the Digital TV Conditional Access - - typically, /dev/dvb/adapter?/ca? - - * - ``MEDIA_INTF_T_DVB_NET`` - - Device node interface for the Digital TV network control - - typically, /dev/dvb/adapter?/net? - - * - ``MEDIA_INTF_T_V4L_VIDEO`` - - Device node interface for video (V4L) - - typically, /dev/video? - - * - ``MEDIA_INTF_T_V4L_VBI`` - - Device node interface for VBI (V4L) - - typically, /dev/vbi? - - * - ``MEDIA_INTF_T_V4L_RADIO`` - - Device node interface for radio (V4L) - - typically, /dev/radio? - - * - ``MEDIA_INTF_T_V4L_SUBDEV`` - - Device node interface for a V4L subdevice - - typically, /dev/v4l-subdev? - - * - ``MEDIA_INTF_T_V4L_SWRADIO`` - - Device node interface for Software Defined Radio (V4L) - - typically, /dev/swradio? - - * - ``MEDIA_INTF_T_V4L_TOUCH`` - - Device node interface for Touch device (V4L) - - typically, /dev/v4l-touch? - - * - ``MEDIA_INTF_T_ALSA_PCM_CAPTURE`` - - Device node interface for ALSA PCM Capture - - typically, /dev/snd/pcmC?D?c - - * - ``MEDIA_INTF_T_ALSA_PCM_PLAYBACK`` - - Device node interface for ALSA PCM Playback - - typically, /dev/snd/pcmC?D?p - - * - ``MEDIA_INTF_T_ALSA_CONTROL`` - - Device node interface for ALSA Control - - typically, /dev/snd/controlC? - - * - ``MEDIA_INTF_T_ALSA_COMPRESS`` - - Device node interface for ALSA Compress - - typically, /dev/snd/compr? - - * - ``MEDIA_INTF_T_ALSA_RAWMIDI`` - - Device node interface for ALSA Raw MIDI - - typically, /dev/snd/midi? - - * - ``MEDIA_INTF_T_ALSA_HWDEP`` - - Device node interface for ALSA Hardware Dependent - - typically, /dev/snd/hwC?D? - - * - ``MEDIA_INTF_T_ALSA_SEQUENCER`` - - Device node interface for ALSA Sequencer - - typically, /dev/snd/seq - - * - ``MEDIA_INTF_T_ALSA_TIMER`` - - Device node interface for ALSA Timer - - typically, /dev/snd/timer - - -.. tabularcolumns:: |p{5.5cm}|p{12.0cm}| - -.. _media-pad-flag: -.. _MEDIA-PAD-FL-SINK: -.. _MEDIA-PAD-FL-SOURCE: -.. _MEDIA-PAD-FL-MUST-CONNECT: - -.. flat-table:: Media pad flags - :header-rows: 0 - :stub-columns: 0 - - * - ``MEDIA_PAD_FL_SINK`` - - Input pad, relative to the entity. Input pads sink data and are - targets of links. - - * - ``MEDIA_PAD_FL_SOURCE`` - - Output pad, relative to the entity. Output pads source data and - are origins of links. - - * - ``MEDIA_PAD_FL_MUST_CONNECT`` - - If this flag is set and the pad is linked to any other pad, then - at least one of those links must be enabled for the entity to be - able to stream. There could be temporary reasons (e.g. device - configuration dependent) for the pad to need enabled links even - when this flag isn't set; the absence of the flag doesn't imply - there is none. - - -One and only one of ``MEDIA_PAD_FL_SINK`` and ``MEDIA_PAD_FL_SOURCE`` -must be set for every pad. - -.. tabularcolumns:: |p{5.5cm}|p{12.0cm}| - -.. _media-link-flag: -.. _MEDIA-LNK-FL-ENABLED: -.. _MEDIA-LNK-FL-IMMUTABLE: -.. _MEDIA-LNK-FL-DYNAMIC: -.. _MEDIA-LNK-FL-LINK-TYPE: - -.. flat-table:: Media link flags - :header-rows: 0 - :stub-columns: 0 - - * - ``MEDIA_LNK_FL_ENABLED`` - - The link is enabled and can be used to transfer media data. When - two or more links target a sink pad, only one of them can be - enabled at a time. - - * - ``MEDIA_LNK_FL_IMMUTABLE`` - - The link enabled state can't be modified at runtime. An immutable - link is always enabled. - - * - ``MEDIA_LNK_FL_DYNAMIC`` - - The link enabled state can be modified during streaming. This flag - is set by drivers and is read-only for applications. - - * - ``MEDIA_LNK_FL_LINK_TYPE`` - - This is a bitmask that defines the type of the link. Currently, - two types of links are supported: - - .. _MEDIA-LNK-FL-DATA-LINK: - - ``MEDIA_LNK_FL_DATA_LINK`` if the link is between two pads - - .. _MEDIA-LNK-FL-INTERFACE-LINK: - - ``MEDIA_LNK_FL_INTERFACE_LINK`` if the link is between an - interface and an entity diff --git a/Documentation/media/uapi/mediactl/request-api.rst b/Documentation/media/uapi/mediactl/request-api.rst deleted file mode 100644 index 01abe8103bdd..000000000000 --- a/Documentation/media/uapi/mediactl/request-api.rst +++ /dev/null @@ -1,276 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _media-request-api: - -Request API -=========== - -The Request API has been designed to allow V4L2 to deal with requirements of -modern devices (stateless codecs, complex camera pipelines, ...) and APIs -(Android Codec v2). One such requirement is the ability for devices belonging to -the same pipeline to reconfigure and collaborate closely on a per-frame basis. -Another is support of stateless codecs, which require controls to be applied -to specific frames (aka 'per-frame controls') in order to be used efficiently. - -While the initial use-case was V4L2, it can be extended to other subsystems -as well, as long as they use the media controller. - -Supporting these features without the Request API is not always possible and if -it is, it is terribly inefficient: user-space would have to flush all activity -on the media pipeline, reconfigure it for the next frame, queue the buffers to -be processed with that configuration, and wait until they are all available for -dequeuing before considering the next frame. This defeats the purpose of having -buffer queues since in practice only one buffer would be queued at a time. - -The Request API allows a specific configuration of the pipeline (media -controller topology + configuration for each media entity) to be associated with -specific buffers. This allows user-space to schedule several tasks ("requests") -with different configurations in advance, knowing that the configuration will be -applied when needed to get the expected result. Configuration values at the time -of request completion are also available for reading. - -General Usage -------------- - -The Request API extends the Media Controller API and cooperates with -subsystem-specific APIs to support request usage. At the Media Controller -level, requests are allocated from the supporting Media Controller device -node. Their life cycle is then managed through the request file descriptors in -an opaque way. Configuration data, buffer handles and processing results -stored in requests are accessed through subsystem-specific APIs extended for -request support, such as V4L2 APIs that take an explicit ``request_fd`` -parameter. - -Request Allocation ------------------- - -User-space allocates requests using :ref:`MEDIA_IOC_REQUEST_ALLOC` -for the media device node. This returns a file descriptor representing the -request. Typically, several such requests will be allocated. - -Request Preparation -------------------- - -Standard V4L2 ioctls can then receive a request file descriptor to express the -fact that the ioctl is part of said request, and is not to be applied -immediately. See :ref:`MEDIA_IOC_REQUEST_ALLOC` for a list of ioctls that -support this. Configurations set with a ``request_fd`` parameter are stored -instead of being immediately applied, and buffers queued to a request do not -enter the regular buffer queue until the request itself is queued. - -Request Submission ------------------- - -Once the configuration and buffers of the request are specified, it can be -queued by calling :ref:`MEDIA_REQUEST_IOC_QUEUE` on the request file descriptor. -A request must contain at least one buffer, otherwise ``ENOENT`` is returned. -A queued request cannot be modified anymore. - -.. caution:: - For :ref:`memory-to-memory devices <mem2mem>` you can use requests only for - output buffers, not for capture buffers. Attempting to add a capture buffer - to a request will result in an ``EBADR`` error. - -If the request contains configurations for multiple entities, individual drivers -may synchronize so the requested pipeline's topology is applied before the -buffers are processed. Media controller drivers do a best effort implementation -since perfect atomicity may not be possible due to hardware limitations. - -.. caution:: - - It is not allowed to mix queuing requests with directly queuing buffers: - whichever method is used first locks this in place until - :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` is called or the device is - :ref:`closed <func-close>`. Attempts to directly queue a buffer when earlier - a buffer was queued via a request or vice versa will result in an ``EBUSY`` - error. - -Controls can still be set without a request and are applied immediately, -regardless of whether a request is in use or not. - -.. caution:: - - Setting the same control through a request and also directly can lead to - undefined behavior! - -User-space can :ref:`poll() <request-func-poll>` a request file descriptor in -order to wait until the request completes. A request is considered complete -once all its associated buffers are available for dequeuing and all the -associated controls have been updated with the values at the time of completion. -Note that user-space does not need to wait for the request to complete to -dequeue its buffers: buffers that are available halfway through a request can -be dequeued independently of the request's state. - -A completed request contains the state of the device after the request was -executed. User-space can query that state by calling -:ref:`ioctl VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` with the request file -descriptor. Calling :ref:`ioctl VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` for a -request that has been queued but not yet completed will return ``EBUSY`` -since the control values might be changed at any time by the driver while the -request is in flight. - -.. _media-request-life-time: - -Recycling and Destruction -------------------------- - -Finally, a completed request can either be discarded or be reused. Calling -:ref:`close() <request-func-close>` on a request file descriptor will make -that file descriptor unusable and the request will be freed once it is no -longer in use by the kernel. That is, if the request is queued and then the -file descriptor is closed, then it won't be freed until the driver completed -the request. - -The :ref:`MEDIA_REQUEST_IOC_REINIT` will clear a request's state and make it -available again. No state is retained by this operation: the request is as -if it had just been allocated. - -Example for a Codec Device --------------------------- - -For use-cases such as :ref:`codecs <mem2mem>`, the request API can be used -to associate specific controls to -be applied by the driver for the OUTPUT buffer, allowing user-space -to queue many such buffers in advance. It can also take advantage of requests' -ability to capture the state of controls when the request completes to read back -information that may be subject to change. - -Put into code, after obtaining a request, user-space can assign controls and one -OUTPUT buffer to it: - -.. code-block:: c - - struct v4l2_buffer buf; - struct v4l2_ext_controls ctrls; - int req_fd; - ... - if (ioctl(media_fd, MEDIA_IOC_REQUEST_ALLOC, &req_fd)) - return errno; - ... - ctrls.which = V4L2_CTRL_WHICH_REQUEST_VAL; - ctrls.request_fd = req_fd; - if (ioctl(codec_fd, VIDIOC_S_EXT_CTRLS, &ctrls)) - return errno; - ... - buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; - buf.flags |= V4L2_BUF_FLAG_REQUEST_FD; - buf.request_fd = req_fd; - if (ioctl(codec_fd, VIDIOC_QBUF, &buf)) - return errno; - -Note that it is not allowed to use the Request API for CAPTURE buffers -since there are no per-frame settings to report there. - -Once the request is fully prepared, it can be queued to the driver: - -.. code-block:: c - - if (ioctl(req_fd, MEDIA_REQUEST_IOC_QUEUE)) - return errno; - -User-space can then either wait for the request to complete by calling poll() on -its file descriptor, or start dequeuing CAPTURE buffers. Most likely, it will -want to get CAPTURE buffers as soon as possible and this can be done using a -regular :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`: - -.. code-block:: c - - struct v4l2_buffer buf; - - memset(&buf, 0, sizeof(buf)); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (ioctl(codec_fd, VIDIOC_DQBUF, &buf)) - return errno; - -Note that this example assumes for simplicity that for every OUTPUT buffer -there will be one CAPTURE buffer, but this does not have to be the case. - -We can then, after ensuring that the request is completed via polling the -request file descriptor, query control values at the time of its completion via -a call to :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`. -This is particularly useful for volatile controls for which we want to -query values as soon as the capture buffer is produced. - -.. code-block:: c - - struct pollfd pfd = { .events = POLLPRI, .fd = req_fd }; - poll(&pfd, 1, -1); - ... - ctrls.which = V4L2_CTRL_WHICH_REQUEST_VAL; - ctrls.request_fd = req_fd; - if (ioctl(codec_fd, VIDIOC_G_EXT_CTRLS, &ctrls)) - return errno; - -Once we don't need the request anymore, we can either recycle it for reuse with -:ref:`MEDIA_REQUEST_IOC_REINIT`... - -.. code-block:: c - - if (ioctl(req_fd, MEDIA_REQUEST_IOC_REINIT)) - return errno; - -... or close its file descriptor to completely dispose of it. - -.. code-block:: c - - close(req_fd); - -Example for a Simple Capture Device ------------------------------------ - -With a simple capture device, requests can be used to specify controls to apply -for a given CAPTURE buffer. - -.. code-block:: c - - struct v4l2_buffer buf; - struct v4l2_ext_controls ctrls; - int req_fd; - ... - if (ioctl(media_fd, MEDIA_IOC_REQUEST_ALLOC, &req_fd)) - return errno; - ... - ctrls.which = V4L2_CTRL_WHICH_REQUEST_VAL; - ctrls.request_fd = req_fd; - if (ioctl(camera_fd, VIDIOC_S_EXT_CTRLS, &ctrls)) - return errno; - ... - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.flags |= V4L2_BUF_FLAG_REQUEST_FD; - buf.request_fd = req_fd; - if (ioctl(camera_fd, VIDIOC_QBUF, &buf)) - return errno; - -Once the request is fully prepared, it can be queued to the driver: - -.. code-block:: c - - if (ioctl(req_fd, MEDIA_REQUEST_IOC_QUEUE)) - return errno; - -User-space can then dequeue buffers, wait for the request completion, query -controls and recycle the request as in the M2M example above. diff --git a/Documentation/media/uapi/mediactl/request-func-close.rst b/Documentation/media/uapi/mediactl/request-func-close.rst deleted file mode 100644 index 2cff7770558e..000000000000 --- a/Documentation/media/uapi/mediactl/request-func-close.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _request-func-close: - -*************** -request close() -*************** - -Name -==== - -request-close - Close a request file descriptor - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: int close( int fd ) - :name: req-close - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`. - - -Description -=========== - -Closes the request file descriptor. Resources associated with the request -are freed once all file descriptors associated with the request are closed -and the driver has completed the request. -See :ref:`here <media-request-life-time>` for more information. - - -Return Value -============ - -:ref:`close() <request-func-close>` returns 0 on success. On error, -1 is -returned, and ``errno`` is set appropriately. Possible error codes are: - -EBADF - ``fd`` is not a valid open file descriptor. diff --git a/Documentation/media/uapi/mediactl/request-func-ioctl.rst b/Documentation/media/uapi/mediactl/request-func-ioctl.rst deleted file mode 100644 index de0781c61873..000000000000 --- a/Documentation/media/uapi/mediactl/request-func-ioctl.rst +++ /dev/null @@ -1,91 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _request-func-ioctl: - -*************** -request ioctl() -*************** - -Name -==== - -request-ioctl - Control a request file descriptor - - -Synopsis -======== - -.. code-block:: c - - #include <sys/ioctl.h> - - -.. c:function:: int ioctl( int fd, int cmd, void *argp ) - :name: req-ioctl - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`. - -``cmd`` - The request ioctl command code as defined in the media.h header file, for - example :ref:`MEDIA_REQUEST_IOC_QUEUE`. - -``argp`` - Pointer to a request-specific structure. - - -Description -=========== - -The :ref:`ioctl() <request-func-ioctl>` function manipulates request -parameters. The argument ``fd`` must be an open file descriptor. - -The ioctl ``cmd`` code specifies the request function to be called. It -has encoded in it whether the argument is an input, output or read/write -parameter, and the size of the argument ``argp`` in bytes. - -Macros and structures definitions specifying request ioctl commands and -their parameters are located in the media.h header file. All request ioctl -commands, their respective function and parameters are specified in -:ref:`media-user-func`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -Command-specific error codes are listed in the individual command -descriptions. - -When an ioctl that takes an output or read/write parameter fails, the -parameter remains unmodified. diff --git a/Documentation/media/uapi/mediactl/request-func-poll.rst b/Documentation/media/uapi/mediactl/request-func-poll.rst deleted file mode 100644 index ebaf33e21873..000000000000 --- a/Documentation/media/uapi/mediactl/request-func-poll.rst +++ /dev/null @@ -1,101 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _request-func-poll: - -************** -request poll() -************** - -Name -==== - -request-poll - Wait for some event on a file descriptor - - -Synopsis -======== - -.. code-block:: c - - #include <sys/poll.h> - - -.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout ) - :name: request-poll - -Arguments -========= - -``ufds`` - List of file descriptor events to be watched - -``nfds`` - Number of file descriptor events at the \*ufds array - -``timeout`` - Timeout to wait for events - - -Description -=========== - -With the :c:func:`poll() <request-func-poll>` function applications can wait -for a request to complete. - -On success :c:func:`poll() <request-func-poll>` returns the number of file -descriptors that have been selected (that is, file descriptors for which the -``revents`` field of the respective struct :c:type:`pollfd` -is non-zero). Request file descriptor set the ``POLLPRI`` flag in ``revents`` -when the request was completed. When the function times out it returns -a value of zero, on failure it returns -1 and the ``errno`` variable is -set appropriately. - -Attempting to poll for a request that is not yet queued will -set the ``POLLERR`` flag in ``revents``. - - -Return Value -============ - -On success, :c:func:`poll() <request-func-poll>` returns the number of -structures which have non-zero ``revents`` fields, or zero if the call -timed out. On error -1 is returned, and the ``errno`` variable is set -appropriately: - -``EBADF`` - One or more of the ``ufds`` members specify an invalid file - descriptor. - -``EFAULT`` - ``ufds`` references an inaccessible memory area. - -``EINTR`` - The call was interrupted by a signal. - -``EINVAL`` - The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use - ``getrlimit()`` to obtain this value. diff --git a/Documentation/media/uapi/rc/keytable.c.rst b/Documentation/media/uapi/rc/keytable.c.rst deleted file mode 100644 index 46f98569e999..000000000000 --- a/Documentation/media/uapi/rc/keytable.c.rst +++ /dev/null @@ -1,183 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -file: uapi/v4l/keytable.c -========================= - -.. code-block:: c - - /* keytable.c - This program allows checking/replacing keys at IR - - Copyright (C) 2006-2009 Mauro Carvalho Chehab <mchehab@kernel.org> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - */ - - #include <ctype.h> - #include <errno.h> - #include <fcntl.h> - #include <stdio.h> - #include <stdlib.h> - #include <string.h> - #include <linux/input.h> - #include <sys/ioctl.h> - - #include "parse.h" - - void prtcode (int *codes) - { - struct parse_key *p; - - for (p=keynames;p->name!=NULL;p++) { - if (p->value == (unsigned)codes[1]) { - printf("scancode 0x%04x = %s (0x%02x)\\n", codes[0], p->name, codes[1]); - return; - } - } - - if (isprint (codes[1])) - printf("scancode %d = '%c' (0x%02x)\\n", codes[0], codes[1], codes[1]); - else - printf("scancode %d = 0x%02x\\n", codes[0], codes[1]); - } - - int parse_code(char *string) - { - struct parse_key *p; - - for (p=keynames;p->name!=NULL;p++) { - if (!strcasecmp(p->name, string)) { - return p->value; - } - } - return -1; - } - - int main (int argc, char *argv[]) - { - int fd; - unsigned int i, j; - int codes[2]; - - if (argc<2 || argc>4) { - printf ("usage: %s <device> to get table; or\\n" - " %s <device> <scancode> <keycode>\\n" - " %s <device> <keycode_file>n",*argv,*argv,*argv); - return -1; - } - - if ((fd = open(argv[1], O_RDONLY)) < 0) { - perror("Couldn't open input device"); - return(-1); - } - - if (argc==4) { - int value; - - value=parse_code(argv[3]); - - if (value==-1) { - value = strtol(argv[3], NULL, 0); - if (errno) - perror("value"); - } - - codes [0] = (unsigned) strtol(argv[2], NULL, 0); - codes [1] = (unsigned) value; - - if(ioctl(fd, EVIOCSKEYCODE, codes)) - perror ("EVIOCSKEYCODE"); - - if(ioctl(fd, EVIOCGKEYCODE, codes)==0) - prtcode(codes); - return 0; - } - - if (argc==3) { - FILE *fin; - int value; - char *scancode, *keycode, s[2048]; - - fin=fopen(argv[2],"r"); - if (fin==NULL) { - perror ("opening keycode file"); - return -1; - } - - /* Clears old table */ - for (j = 0; j < 256; j++) { - for (i = 0; i < 256; i++) { - codes[0] = (j << 8) | i; - codes[1] = KEY_RESERVED; - ioctl(fd, EVIOCSKEYCODE, codes); - } - } - - while (fgets(s,sizeof(s),fin)) { - scancode=strtok(s,"\\n\\t =:"); - if (!scancode) { - perror ("parsing input file scancode"); - return -1; - } - if (!strcasecmp(scancode, "scancode")) { - scancode = strtok(NULL,"\\n\\t =:"); - if (!scancode) { - perror ("parsing input file scancode"); - return -1; - } - } - - keycode=strtok(NULL,"\\n\\t =:("); - if (!keycode) { - perror ("parsing input file keycode"); - return -1; - } - - // printf ("parsing %s=%s:", scancode, keycode); - value=parse_code(keycode); - // printf ("\\tvalue=%d\\n",value); - - if (value==-1) { - value = strtol(keycode, NULL, 0); - if (errno) - perror("value"); - } - - codes [0] = (unsigned) strtol(scancode, NULL, 0); - codes [1] = (unsigned) value; - - // printf("\\t%04x=%04x\\n",codes[0], codes[1]); - if(ioctl(fd, EVIOCSKEYCODE, codes)) { - fprintf(stderr, "Setting scancode 0x%04x with 0x%04x via ",codes[0], codes[1]); - perror ("EVIOCSKEYCODE"); - } - - if(ioctl(fd, EVIOCGKEYCODE, codes)==0) - prtcode(codes); - } - return 0; - } - - /* Get scancode table */ - for (j = 0; j < 256; j++) { - for (i = 0; i < 256; i++) { - codes[0] = (j << 8) | i; - if (!ioctl(fd, EVIOCGKEYCODE, codes) && codes[1] != KEY_RESERVED) - prtcode(codes); - } - } - return 0; - } diff --git a/Documentation/media/uapi/rc/lirc-dev-intro.rst b/Documentation/media/uapi/rc/lirc-dev-intro.rst deleted file mode 100644 index b68c01693939..000000000000 --- a/Documentation/media/uapi/rc/lirc-dev-intro.rst +++ /dev/null @@ -1,171 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_dev_intro: - -************ -Introduction -************ - -LIRC stands for Linux Infrared Remote Control. The LIRC device interface is -a bi-directional interface for transporting raw IR and decoded scancodes -data between userspace and kernelspace. Fundamentally, it is just a chardev -(/dev/lircX, for X = 0, 1, 2, ...), with a number of standard struct -file_operations defined on it. With respect to transporting raw IR and -decoded scancodes to and fro, the essential fops are read, write and ioctl. - -It is also possible to attach a BPF program to a LIRC device for decoding -raw IR into scancodes. - -Example dmesg output upon a driver registering w/LIRC: - -.. code-block:: none - - $ dmesg |grep lirc_dev - rc rc0: lirc_dev: driver mceusb registered at minor = 0, raw IR receiver, raw IR transmitter - -What you should see for a chardev: - -.. code-block:: none - - $ ls -l /dev/lirc* - crw-rw---- 1 root root 248, 0 Jul 2 22:20 /dev/lirc0 - -Note that the package `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_ -contains tools for working with LIRC devices: - - - ir-ctl: can receive raw IR and transmit IR, as well as query LIRC - device features. - - - ir-keytable: can load keymaps; allows you to set IR kernel protocols; load - BPF IR decoders and test IR decoding. Some BPF IR decoders are also - provided. - -.. _lirc_modes: - -********** -LIRC modes -********** - -LIRC supports some modes of receiving and sending IR codes, as shown -on the following table. - -.. _lirc-mode-scancode: -.. _lirc-scancode-flag-toggle: -.. _lirc-scancode-flag-repeat: - -``LIRC_MODE_SCANCODE`` - - This mode is for both sending and receiving IR. - - For transmitting (aka sending), create a ``struct lirc_scancode`` with - the desired scancode set in the ``scancode`` member, :c:type:`rc_proto` - set to the :ref:`IR protocol <Remote_controllers_Protocols>`, and all other - members set to 0. Write this struct to the lirc device. - - For receiving, you read ``struct lirc_scancode`` from the LIRC device. - The ``scancode`` field is set to the received scancode and the - :ref:`IR protocol <Remote_controllers_Protocols>` is set in - :c:type:`rc_proto`. If the scancode maps to a valid key code, this is set - in the ``keycode`` field, else it is set to ``KEY_RESERVED``. - - The ``flags`` can have ``LIRC_SCANCODE_FLAG_TOGGLE`` set if the toggle - bit is set in protocols that support it (e.g. rc-5 and rc-6), or - ``LIRC_SCANCODE_FLAG_REPEAT`` for when a repeat is received for protocols - that support it (e.g. nec). - - In the Sanyo and NEC protocol, if you hold a button on remote, rather than - repeating the entire scancode, the remote sends a shorter message with - no scancode, which just means button is held, a "repeat". When this is - received, the ``LIRC_SCANCODE_FLAG_REPEAT`` is set and the scancode and - keycode is repeated. - - With nec, there is no way to distinguish "button hold" from "repeatedly - pressing the same button". The rc-5 and rc-6 protocols have a toggle bit. - When a button is released and pressed again, the toggle bit is inverted. - If the toggle bit is set, the ``LIRC_SCANCODE_FLAG_TOGGLE`` is set. - - The ``timestamp`` field is filled with the time nanoseconds - (in ``CLOCK_MONOTONIC``) when the scancode was decoded. - -.. _lirc-mode-mode2: - -``LIRC_MODE_MODE2`` - - The driver returns a sequence of pulse and space codes to userspace, - as a series of u32 values. - - This mode is used only for IR receive. - - The upper 8 bits determine the packet type, and the lower 24 bits - the payload. Use ``LIRC_VALUE()`` macro to get the payload, and - the macro ``LIRC_MODE2()`` will give you the type, which - is one of: - - ``LIRC_MODE2_PULSE`` - - Signifies the presence of IR in microseconds. - - ``LIRC_MODE2_SPACE`` - - Signifies absence of IR in microseconds. - - ``LIRC_MODE2_FREQUENCY`` - - If measurement of the carrier frequency was enabled with - :ref:`lirc_set_measure_carrier_mode` then this packet gives you - the carrier frequency in Hertz. - - ``LIRC_MODE2_TIMEOUT`` - - If timeout reports are enabled with - :ref:`lirc_set_rec_timeout_reports`, when the timeout set with - :ref:`lirc_set_rec_timeout` expires due to no IR being detected, - this packet will be sent, with the number of microseconds with - no IR. - -.. _lirc-mode-pulse: - -``LIRC_MODE_PULSE`` - - In pulse mode, a sequence of pulse/space integer values are written to the - lirc device using :ref:`lirc-write`. - - The values are alternating pulse and space lengths, in microseconds. The - first and last entry must be a pulse, so there must be an odd number - of entries. - - This mode is used only for IR send. - -******************** -BPF based IR decoder -******************** - -The kernel has support for decoding the most common -:ref:`IR protocols <Remote_controllers_Protocols>`, but there -are many protocols which are not supported. To support these, it is possible -to load an BPF program which does the decoding. This can only be done on -LIRC devices which support reading raw IR. - -First, using the `bpf(2)`_ syscall with the ``BPF_LOAD_PROG`` argument, -program must be loaded of type ``BPF_PROG_TYPE_LIRC_MODE2``. Once attached -to the LIRC device, this program will be called for each pulse, space or -timeout event on the LIRC device. The context for the BPF program is a -pointer to a unsigned int, which is a :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` -value. When the program has decoded the scancode, it can be submitted using -the BPF functions ``bpf_rc_keydown()`` or ``bpf_rc_repeat()``. Mouse or pointer -movements can be reported using ``bpf_rc_pointer_rel()``. - -Once you have the file descriptor for the ``BPF_PROG_TYPE_LIRC_MODE2`` BPF -program, it can be attached to the LIRC device using the `bpf(2)`_ syscall. -The target must be the file descriptor for the LIRC device, and the -attach type must be ``BPF_LIRC_MODE2``. No more than 64 BPF programs can be -attached to a single LIRC device at a time. - -.. _bpf(2): http://man7.org/linux/man-pages/man2/bpf.2.html diff --git a/Documentation/media/uapi/rc/lirc-dev.rst b/Documentation/media/uapi/rc/lirc-dev.rst deleted file mode 100644 index 7058e0b2296a..000000000000 --- a/Documentation/media/uapi/rc/lirc-dev.rst +++ /dev/null @@ -1,21 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_dev: - -LIRC Device Interface -===================== - - -.. toctree:: - :maxdepth: 1 - - lirc-dev-intro - lirc-func - lirc-header diff --git a/Documentation/media/uapi/rc/lirc-func.rst b/Documentation/media/uapi/rc/lirc-func.rst deleted file mode 100644 index 25058369f724..000000000000 --- a/Documentation/media/uapi/rc/lirc-func.rst +++ /dev/null @@ -1,34 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_func: - -LIRC Function Reference -======================= - - -.. toctree:: - :maxdepth: 1 - - lirc-read - lirc-write - lirc-get-features - lirc-get-send-mode - lirc-get-rec-mode - lirc-get-rec-resolution - lirc-set-send-duty-cycle - lirc-get-timeout - lirc-set-rec-timeout - lirc-set-rec-carrier - lirc-set-rec-carrier-range - lirc-set-send-carrier - lirc-set-transmitter-mask - lirc-set-rec-timeout-reports - lirc-set-measure-carrier-mode - lirc-set-wideband-receiver diff --git a/Documentation/media/uapi/rc/lirc-get-features.rst b/Documentation/media/uapi/rc/lirc-get-features.rst deleted file mode 100644 index 1d590df8164a..000000000000 --- a/Documentation/media/uapi/rc/lirc-get-features.rst +++ /dev/null @@ -1,200 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_get_features: - -*********************** -ioctl LIRC_GET_FEATURES -*********************** - -Name -==== - -LIRC_GET_FEATURES - Get the underlying hardware device's features - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_GET_FEATURES, __u32 *features) - :name: LIRC_GET_FEATURES - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``features`` - Bitmask with the LIRC features. - - -Description -=========== - - -Get the underlying hardware device's features. If a driver does not -announce support of certain features, calling of the corresponding ioctls -is undefined. - -LIRC features -============= - -.. _LIRC-CAN-REC-RAW: - -``LIRC_CAN_REC_RAW`` - - Unused. Kept just to avoid breaking uAPI. - -.. _LIRC-CAN-REC-PULSE: - -``LIRC_CAN_REC_PULSE`` - - Unused. Kept just to avoid breaking uAPI. - :ref:`LIRC_MODE_PULSE <lirc-mode-pulse>` can only be used for transmitting. - -.. _LIRC-CAN-REC-MODE2: - -``LIRC_CAN_REC_MODE2`` - - This is raw IR driver for receiving. This means that - :ref:`LIRC_MODE_MODE2 <lirc-mode-MODE2>` is used. This also implies - that :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is also supported, - as long as the kernel is recent enough. Use the - :ref:`lirc_set_rec_mode` to switch modes. - -.. _LIRC-CAN-REC-LIRCCODE: - -``LIRC_CAN_REC_LIRCCODE`` - - Unused. Kept just to avoid breaking uAPI. - -.. _LIRC-CAN-REC-SCANCODE: - -``LIRC_CAN_REC_SCANCODE`` - - This is a scancode driver for receiving. This means that - :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is used. - -.. _LIRC-CAN-SET-SEND-CARRIER: - -``LIRC_CAN_SET_SEND_CARRIER`` - - The driver supports changing the modulation frequency via - :ref:`ioctl LIRC_SET_SEND_CARRIER <LIRC_SET_SEND_CARRIER>`. - -.. _LIRC-CAN-SET-SEND-DUTY-CYCLE: - -``LIRC_CAN_SET_SEND_DUTY_CYCLE`` - - The driver supports changing the duty cycle using - :ref:`ioctl LIRC_SET_SEND_DUTY_CYCLE <LIRC_SET_SEND_DUTY_CYCLE>`. - -.. _LIRC-CAN-SET-TRANSMITTER-MASK: - -``LIRC_CAN_SET_TRANSMITTER_MASK`` - - The driver supports changing the active transmitter(s) using - :ref:`ioctl LIRC_SET_TRANSMITTER_MASK <LIRC_SET_TRANSMITTER_MASK>`. - -.. _LIRC-CAN-SET-REC-CARRIER: - -``LIRC_CAN_SET_REC_CARRIER`` - - The driver supports setting the receive carrier frequency using - :ref:`ioctl LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>`. - -.. _LIRC-CAN-SET-REC-DUTY-CYCLE-RANGE: - -``LIRC_CAN_SET_REC_DUTY_CYCLE_RANGE`` - - Unused. Kept just to avoid breaking uAPI. - -.. _LIRC-CAN-SET-REC-CARRIER-RANGE: - -``LIRC_CAN_SET_REC_CARRIER_RANGE`` - - The driver supports - :ref:`ioctl LIRC_SET_REC_CARRIER_RANGE <LIRC_SET_REC_CARRIER_RANGE>`. - -.. _LIRC-CAN-GET-REC-RESOLUTION: - -``LIRC_CAN_GET_REC_RESOLUTION`` - - The driver supports - :ref:`ioctl LIRC_GET_REC_RESOLUTION <LIRC_GET_REC_RESOLUTION>`. - -.. _LIRC-CAN-SET-REC-TIMEOUT: - -``LIRC_CAN_SET_REC_TIMEOUT`` - - The driver supports - :ref:`ioctl LIRC_SET_REC_TIMEOUT <LIRC_SET_REC_TIMEOUT>`. - -.. _LIRC-CAN-SET-REC-FILTER: - -``LIRC_CAN_SET_REC_FILTER`` - - Unused. Kept just to avoid breaking uAPI. - -.. _LIRC-CAN-MEASURE-CARRIER: - -``LIRC_CAN_MEASURE_CARRIER`` - - The driver supports measuring of the modulation frequency using - :ref:`ioctl LIRC_SET_MEASURE_CARRIER_MODE <LIRC_SET_MEASURE_CARRIER_MODE>`. - -.. _LIRC-CAN-USE-WIDEBAND-RECEIVER: - -``LIRC_CAN_USE_WIDEBAND_RECEIVER`` - - The driver supports learning mode using - :ref:`ioctl LIRC_SET_WIDEBAND_RECEIVER <LIRC_SET_WIDEBAND_RECEIVER>`. - -.. _LIRC-CAN-NOTIFY-DECODE: - -``LIRC_CAN_NOTIFY_DECODE`` - - Unused. Kept just to avoid breaking uAPI. - -.. _LIRC-CAN-SEND-RAW: - -``LIRC_CAN_SEND_RAW`` - - Unused. Kept just to avoid breaking uAPI. - -.. _LIRC-CAN-SEND-PULSE: - -``LIRC_CAN_SEND_PULSE`` - - The driver supports sending (also called as IR blasting or IR TX) using - :ref:`LIRC_MODE_PULSE <lirc-mode-pulse>`. This implies that - :ref:`LIRC_MODE_SCANCODE <lirc-mode-SCANCODE>` is also supported for - transmit, as long as the kernel is recent enough. Use the - :ref:`lirc_set_send_mode` to switch modes. - -.. _LIRC-CAN-SEND-MODE2: - -``LIRC_CAN_SEND_MODE2`` - - Unused. Kept just to avoid breaking uAPI. - :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` can only be used for receiving. - -.. _LIRC-CAN-SEND-LIRCCODE: - -``LIRC_CAN_SEND_LIRCCODE`` - - Unused. Kept just to avoid breaking uAPI. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-get-rec-mode.rst b/Documentation/media/uapi/rc/lirc-get-rec-mode.rst deleted file mode 100644 index 0a3e02aca80e..000000000000 --- a/Documentation/media/uapi/rc/lirc-get-rec-mode.rst +++ /dev/null @@ -1,74 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_get_rec_mode: -.. _lirc_set_rec_mode: - -********************************************** -ioctls LIRC_GET_REC_MODE and LIRC_SET_REC_MODE -********************************************** - -Name -==== - -LIRC_GET_REC_MODE/LIRC_SET_REC_MODE - Get/set current receive mode. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_GET_REC_MODE, __u32 *mode) - :name: LIRC_GET_REC_MODE - -.. c:function:: int ioctl( int fd, LIRC_SET_REC_MODE, __u32 *mode) - :name: LIRC_SET_REC_MODE - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``mode`` - Mode used for receive. - -Description -=========== - -Get and set the current receive mode. Only -:ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` and -:ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` are supported. -Use :ref:`lirc_get_features` to find out which modes the driver supports. - -Return Value -============ - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``ENODEV`` - - - Device not available. - - - .. row 2 - - - ``ENOTTY`` - - - Device does not support receiving. - - - .. row 3 - - - ``EINVAL`` - - - Invalid mode or invalid mode for this device. diff --git a/Documentation/media/uapi/rc/lirc-get-rec-resolution.rst b/Documentation/media/uapi/rc/lirc-get-rec-resolution.rst deleted file mode 100644 index f560b694ccf2..000000000000 --- a/Documentation/media/uapi/rc/lirc-get-rec-resolution.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_get_rec_resolution: - -***************************** -ioctl LIRC_GET_REC_RESOLUTION -***************************** - -Name -==== - -LIRC_GET_REC_RESOLUTION - Obtain the value of receive resolution, in microseconds. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_GET_REC_RESOLUTION, __u32 *microseconds) - :name: LIRC_GET_REC_RESOLUTION - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``microseconds`` - Resolution, in microseconds. - - -Description -=========== - -Some receivers have maximum resolution which is defined by internal -sample rate or data format limitations. E.g. it's common that -signals can only be reported in 50 microsecond steps. - -This ioctl returns the integer value with such resolution, with can be -used by userspace applications like lircd to automatically adjust the -tolerance value. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-get-send-mode.rst b/Documentation/media/uapi/rc/lirc-get-send-mode.rst deleted file mode 100644 index 4f440c697052..000000000000 --- a/Documentation/media/uapi/rc/lirc-get-send-mode.rst +++ /dev/null @@ -1,78 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_get_send_mode: -.. _lirc_set_send_mode: - -************************************************ -ioctls LIRC_GET_SEND_MODE and LIRC_SET_SEND_MODE -************************************************ - -Name -==== - -LIRC_GET_SEND_MODE/LIRC_SET_SEND_MODE - Get/set current transmit mode. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_GET_SEND_MODE, __u32 *mode ) - :name: LIRC_GET_SEND_MODE - -.. c:function:: int ioctl( int fd, LIRC_SET_SEND_MODE, __u32 *mode ) - :name: LIRC_SET_SEND_MODE - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``mode`` - The mode used for transmitting. - - -Description -=========== - -Get/set current transmit mode. - -Only :ref:`LIRC_MODE_PULSE <lirc-mode-pulse>` and -:ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` are supported by for IR send, -depending on the driver. Use :ref:`lirc_get_features` to find out which -modes the driver supports. - -Return Value -============ - - -.. tabularcolumns:: |p{2.5cm}|p{15.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - ``ENODEV`` - - - Device not available. - - - .. row 2 - - - ``ENOTTY`` - - - Device does not support transmitting. - - - .. row 3 - - - ``EINVAL`` - - - Invalid mode or invalid mode for this device. diff --git a/Documentation/media/uapi/rc/lirc-get-timeout.rst b/Documentation/media/uapi/rc/lirc-get-timeout.rst deleted file mode 100644 index 1de214529f27..000000000000 --- a/Documentation/media/uapi/rc/lirc-get-timeout.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_get_min_timeout: -.. _lirc_get_max_timeout: - -**************************************************** -ioctls LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT -**************************************************** - -Name -==== - -LIRC_GET_MIN_TIMEOUT / LIRC_GET_MAX_TIMEOUT - Obtain the possible timeout -range for IR receive. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_GET_MIN_TIMEOUT, __u32 *timeout) - :name: LIRC_GET_MIN_TIMEOUT - -.. c:function:: int ioctl( int fd, LIRC_GET_MAX_TIMEOUT, __u32 *timeout) - :name: LIRC_GET_MAX_TIMEOUT - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``timeout`` - Timeout, in microseconds. - - -Description -=========== - -Some devices have internal timers that can be used to detect when -there's no IR activity for a long time. This can help lircd in -detecting that a IR signal is finished and can speed up the decoding -process. Returns an integer value with the minimum/maximum timeout -that can be set. - -.. note:: - - Some devices have a fixed timeout, in that case - both ioctls will return the same value even though the timeout - cannot be changed via :ref:`LIRC_SET_REC_TIMEOUT`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-header.rst b/Documentation/media/uapi/rc/lirc-header.rst deleted file mode 100644 index c9b4f33e1031..000000000000 --- a/Documentation/media/uapi/rc/lirc-header.rst +++ /dev/null @@ -1,17 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_header: - -**************** -LIRC Header File -**************** - -.. kernel-include:: $BUILDDIR/lirc.h.rst - diff --git a/Documentation/media/uapi/rc/lirc-read.rst b/Documentation/media/uapi/rc/lirc-read.rst deleted file mode 100644 index 256e520bc27e..000000000000 --- a/Documentation/media/uapi/rc/lirc-read.rst +++ /dev/null @@ -1,76 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc-read: - -*********** -LIRC read() -*********** - -Name -==== - -lirc-read - Read from a LIRC device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: ssize_t read( int fd, void *buf, size_t count ) - :name: lirc-read - - -Arguments -========= - -``fd`` - File descriptor returned by ``open()``. - -``buf`` - Buffer to be filled - -``count`` - Max number of bytes to read - -Description -=========== - -:ref:`read() <lirc-read>` attempts to read up to ``count`` bytes from file -descriptor ``fd`` into the buffer starting at ``buf``. If ``count`` is zero, -:ref:`read() <lirc-read>` returns zero and has no other results. If ``count`` -is greater than ``SSIZE_MAX``, the result is unspecified. - -The exact format of the data depends on what :ref:`lirc_modes` a driver -uses. Use :ref:`lirc_get_features` to get the supported mode, and use -:ref:`lirc_set_rec_mode` set the current active mode. - -The mode :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>` is for raw IR, -in which packets containing an unsigned int value describing an IR signal are -read from the chardev. - -Alternatively, :ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` can be available, -in this mode scancodes which are either decoded by software decoders, or -by hardware decoders. The :c:type:`rc_proto` member is set to the -:ref:`IR protocol <Remote_controllers_Protocols>` -used for transmission, and ``scancode`` to the decoded scancode, -and the ``keycode`` set to the keycode or ``KEY_RESERVED``. - - -Return Value -============ - -On success, the number of bytes read is returned. It is not an error if -this number is smaller than the number of bytes requested, or the amount -of data required for one frame. On error, -1 is returned, and the ``errno`` -variable is set appropriately. diff --git a/Documentation/media/uapi/rc/lirc-set-measure-carrier-mode.rst b/Documentation/media/uapi/rc/lirc-set-measure-carrier-mode.rst deleted file mode 100644 index c80acd85e369..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-measure-carrier-mode.rst +++ /dev/null @@ -1,53 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_measure_carrier_mode: - -*********************************** -ioctl LIRC_SET_MEASURE_CARRIER_MODE -*********************************** - -Name -==== - -LIRC_SET_MEASURE_CARRIER_MODE - enable or disable measure mode - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_MEASURE_CARRIER_MODE, __u32 *enable ) - :name: LIRC_SET_MEASURE_CARRIER_MODE - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``enable`` - enable = 1 means enable measure mode, enable = 0 means disable measure - mode. - - -Description -=========== - -.. _lirc-mode2-frequency: - -Enable or disable measure mode. If enabled, from the next key -press on, the driver will send ``LIRC_MODE2_FREQUENCY`` packets. By -default this should be turned off. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-rec-carrier-range.rst b/Documentation/media/uapi/rc/lirc-set-rec-carrier-range.rst deleted file mode 100644 index 443681d5cc10..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-rec-carrier-range.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_rec_carrier_range: - -******************************** -ioctl LIRC_SET_REC_CARRIER_RANGE -******************************** - -Name -==== - -LIRC_SET_REC_CARRIER_RANGE - Set lower bound of the carrier used to modulate -IR receive. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_REC_CARRIER_RANGE, __u32 *frequency ) - :name: LIRC_SET_REC_CARRIER_RANGE - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``frequency`` - Frequency of the carrier that modulates PWM data, in Hz. - -Description -=========== - -This ioctl sets the upper range of carrier frequency that will be recognized -by the IR receiver. - -.. note:: - - To set a range use :ref:`LIRC_SET_REC_CARRIER_RANGE - <LIRC_SET_REC_CARRIER_RANGE>` with the lower bound first and later call - :ref:`LIRC_SET_REC_CARRIER <LIRC_SET_REC_CARRIER>` with the upper bound. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-rec-carrier.rst b/Documentation/media/uapi/rc/lirc-set-rec-carrier.rst deleted file mode 100644 index cbe1e48b2a4a..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-rec-carrier.rst +++ /dev/null @@ -1,53 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_rec_carrier: - -************************** -ioctl LIRC_SET_REC_CARRIER -************************** - -Name -==== - -LIRC_SET_REC_CARRIER - Set carrier used to modulate IR receive. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_REC_CARRIER, __u32 *frequency ) - :name: LIRC_SET_REC_CARRIER - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``frequency`` - Frequency of the carrier that modulates PWM data, in Hz. - -Description -=========== - -Set receive carrier used to modulate IR PWM pulses and spaces. - -.. note:: - - If called together with :ref:`LIRC_SET_REC_CARRIER_RANGE`, this ioctl - sets the upper bound frequency that will be recognized by the device. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-rec-timeout-reports.rst b/Documentation/media/uapi/rc/lirc-set-rec-timeout-reports.rst deleted file mode 100644 index d06d69414c1e..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-rec-timeout-reports.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_rec_timeout_reports: - -********************************** -ioctl LIRC_SET_REC_TIMEOUT_REPORTS -********************************** - -Name -==== - -LIRC_SET_REC_TIMEOUT_REPORTS - enable or disable timeout reports for IR receive - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_REC_TIMEOUT_REPORTS, __u32 *enable ) - :name: LIRC_SET_REC_TIMEOUT_REPORTS - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``enable`` - enable = 1 means enable timeout report, enable = 0 means disable timeout - reports. - - -Description -=========== - -.. _lirc-mode2-timeout: - -Enable or disable timeout reports for IR receive. By default, timeout reports -should be turned off. - -.. note:: - - This ioctl is only valid for :ref:`LIRC_MODE_MODE2 <lirc-mode-mode2>`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-rec-timeout.rst b/Documentation/media/uapi/rc/lirc-set-rec-timeout.rst deleted file mode 100644 index 163ac6065737..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-rec-timeout.rst +++ /dev/null @@ -1,61 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_rec_timeout: -.. _lirc_get_rec_timeout: - -*************************************************** -ioctl LIRC_GET_REC_TIMEOUT and LIRC_SET_REC_TIMEOUT -*************************************************** - -Name -==== - -LIRC_GET_REC_TIMEOUT/LIRC_SET_REC_TIMEOUT - Get/set the integer value for IR inactivity timeout. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_GET_REC_TIMEOUT, __u32 *timeout ) - :name: LIRC_GET_REC_TIMEOUT - -.. c:function:: int ioctl( int fd, LIRC_SET_REC_TIMEOUT, __u32 *timeout ) - :name: LIRC_SET_REC_TIMEOUT - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``timeout`` - Timeout, in microseconds. - - -Description -=========== - -Get and set the integer value for IR inactivity timeout. - -If supported by the hardware, setting it to 0 disables all hardware timeouts -and data should be reported as soon as possible. If the exact value -cannot be set, then the next possible value _greater_ than the -given value should be set. - -.. note:: - - The range of supported timeout is given by :ref:`LIRC_GET_MIN_TIMEOUT`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-send-carrier.rst b/Documentation/media/uapi/rc/lirc-set-send-carrier.rst deleted file mode 100644 index cffc6c1e15cc..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-send-carrier.rst +++ /dev/null @@ -1,48 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_send_carrier: - -*************************** -ioctl LIRC_SET_SEND_CARRIER -*************************** - -Name -==== - -LIRC_SET_SEND_CARRIER - Set send carrier used to modulate IR TX. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_SEND_CARRIER, __u32 *frequency ) - :name: LIRC_SET_SEND_CARRIER - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``frequency`` - Frequency of the carrier to be modulated, in Hz. - -Description -=========== - -Set send carrier used to modulate IR PWM pulses and spaces. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-send-duty-cycle.rst b/Documentation/media/uapi/rc/lirc-set-send-duty-cycle.rst deleted file mode 100644 index 08ab3d1a96cd..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-send-duty-cycle.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_send_duty_cycle: - -****************************** -ioctl LIRC_SET_SEND_DUTY_CYCLE -****************************** - -Name -==== - -LIRC_SET_SEND_DUTY_CYCLE - Set the duty cycle of the carrier signal for -IR transmit. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_SEND_DUTY_CYCLE, __u32 *duty_cycle) - :name: LIRC_SET_SEND_DUTY_CYCLE - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``duty_cycle`` - Duty cicle, describing the pulse width in percent (from 1 to 99) of - the total cycle. Values 0 and 100 are reserved. - - -Description -=========== - -Get/set the duty cycle of the carrier signal for IR transmit. - -Currently, no special meaning is defined for 0 or 100, but this -could be used to switch off carrier generation in the future, so -these values should be reserved. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst b/Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst deleted file mode 100644 index 889a739eaf0d..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-transmitter-mask.rst +++ /dev/null @@ -1,58 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_transmitter_mask: - -******************************* -ioctl LIRC_SET_TRANSMITTER_MASK -******************************* - -Name -==== - -LIRC_SET_TRANSMITTER_MASK - Enables send codes on a given set of transmitters - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_TRANSMITTER_MASK, __u32 *mask ) - :name: LIRC_SET_TRANSMITTER_MASK - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``mask`` - Mask with channels to enable tx. Channel 0 is the least significant bit. - - -Description -=========== - -Some IR TX devices have multiple output channels, in such case, -:ref:`LIRC_CAN_SET_TRANSMITTER_MASK <LIRC-CAN-SET-TRANSMITTER-MASK>` is -returned via :ref:`LIRC_GET_FEATURES` and this ioctl sets what channels will -send IR codes. - -This ioctl enables the given set of transmitters. The first transmitter is -encoded by the least significant bit and so on. - -When an invalid bit mask is given, i.e. a bit is set, even though the device -does not have so many transitters, then this ioctl returns the number of -available transitters and does nothing otherwise. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-set-wideband-receiver.rst b/Documentation/media/uapi/rc/lirc-set-wideband-receiver.rst deleted file mode 100644 index 592715452fce..000000000000 --- a/Documentation/media/uapi/rc/lirc-set-wideband-receiver.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc_set_wideband_receiver: - -******************************** -ioctl LIRC_SET_WIDEBAND_RECEIVER -******************************** - -Name -==== - -LIRC_SET_WIDEBAND_RECEIVER - enable wide band receiver. - -Synopsis -======== - -.. c:function:: int ioctl( int fd, LIRC_SET_WIDEBAND_RECEIVER, __u32 *enable ) - :name: LIRC_SET_WIDEBAND_RECEIVER - -Arguments -========= - -``fd`` - File descriptor returned by open(). - -``enable`` - enable = 1 means enable wideband receiver, enable = 0 means disable - wideband receiver. - - -Description -=========== - -Some receivers are equipped with special wide band receiver which is -intended to be used to learn output of existing remote. This ioctl -allows enabling or disabling it. - -This might be useful of receivers that have otherwise narrow band receiver -that prevents them to be used with some remotes. Wide band receiver might -also be more precise. On the other hand its disadvantage it usually -reduced range of reception. - -.. note:: - - Wide band receiver might be implictly enabled if you enable - carrier reports. In that case it will be disabled as soon as you disable - carrier reports. Trying to disable wide band receiver while carrier - reports are active will do nothing. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/lirc-write.rst b/Documentation/media/uapi/rc/lirc-write.rst deleted file mode 100644 index eafe13203ea3..000000000000 --- a/Documentation/media/uapi/rc/lirc-write.rst +++ /dev/null @@ -1,82 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _lirc-write: - -************ -LIRC write() -************ - -Name -==== - -lirc-write - Write to a LIRC device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: ssize_t write( int fd, void *buf, size_t count ) - :name: lirc-write - -Arguments -========= - -``fd`` - File descriptor returned by ``open()``. - -``buf`` - Buffer with data to be written - -``count`` - Number of bytes at the buffer - -Description -=========== - -:ref:`write() <lirc-write>` writes up to ``count`` bytes to the device -referenced by the file descriptor ``fd`` from the buffer starting at -``buf``. - -The exact format of the data depends on what mode a driver is in, use -:ref:`lirc_get_features` to get the supported modes and use -:ref:`lirc_set_send_mode` set the mode. - -When in :ref:`LIRC_MODE_PULSE <lirc-mode-PULSE>` mode, the data written to -the chardev is a pulse/space sequence of integer values. Pulses and spaces -are only marked implicitly by their position. The data must start and end -with a pulse, therefore, the data must always include an uneven number of -samples. The write function blocks until the data has been transmitted -by the hardware. If more data is provided than the hardware can send, the -driver returns ``EINVAL``. - -When in :ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` mode, one -``struct lirc_scancode`` must be written to the chardev at a time, else -``EINVAL`` is returned. Set the desired scancode in the ``scancode`` member, -and the :ref:`IR protocol <Remote_controllers_Protocols>` in the -:c:type:`rc_proto`: member. All other members must be -set to 0, else ``EINVAL`` is returned. If there is no protocol encoder -for the protocol or the scancode is not valid for the specified protocol, -``EINVAL`` is returned. The write function blocks until the scancode -is transmitted by the hardware. - - -Return Value -============ - -On success, the number of bytes written is returned. It is not an error if -this number is smaller than the number of bytes requested, or the amount -of data required for one frame. On error, -1 is returned, and the ``errno`` -variable is set appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/rc/rc-intro.rst b/Documentation/media/uapi/rc/rc-intro.rst deleted file mode 100644 index 37c5f90c76e7..000000000000 --- a/Documentation/media/uapi/rc/rc-intro.rst +++ /dev/null @@ -1,31 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _Remote_controllers_Intro: - -************ -Introduction -************ - -Currently, most analog and digital devices have a Infrared input for -remote controllers. Each manufacturer has their own type of control. It -is not rare for the same manufacturer to ship different types of -controls, depending on the device. - -A Remote Controller interface is mapped as a normal evdev/input -interface, just like a keyboard or a mouse. So, it uses all ioctls -already defined for any other input devices. - -However, remove controllers are more flexible than a normal input -device, as the IR receiver (and/or transmitter) can be used in -conjunction with a wide variety of different IR remotes. - -In order to allow flexibility, the Remote Controller subsystem allows -controlling the RC-specific attributes via -:ref:`the sysfs class nodes <remote_controllers_sysfs_nodes>`. diff --git a/Documentation/media/uapi/rc/rc-protos.rst b/Documentation/media/uapi/rc/rc-protos.rst deleted file mode 100644 index b250ebe301d5..000000000000 --- a/Documentation/media/uapi/rc/rc-protos.rst +++ /dev/null @@ -1,456 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _Remote_controllers_Protocols: - -***************************************** -Remote Controller Protocols and Scancodes -***************************************** - -IR is encoded as a series of pulses and spaces, using a protocol. These -protocols can encode e.g. an address (which device should respond) and a -command: what it should do. The values for these are not always consistent -across different devices for a given protocol. - -Therefore out the output of the IR decoder is a scancode; a single u32 -value. Using keymap tables this can be mapped to linux key codes. - -Other things can be encoded too. Some IR protocols encode a toggle bit; this -is to distinguish whether the same button is being held down, or has been -released and pressed again. If has been released and pressed again, the -toggle bit will invert from one IR message to the next. - -Some remotes have a pointer-type device which can used to control the -mouse; some air conditioning systems can have their target temperature -target set in IR. - -The following are the protocols the kernel knows about and also lists -how scancodes are encoded for each protocol. - -rc-5 (RC_PROTO_RC5) -------------------- - -This IR protocol uses manchester encoding to encode 14 bits. There is a -detailed description here https://www.sbprojects.net/knowledge/ir/rc5.php. - -The scancode encoding is *not* consistent with the lirc daemon (lircd) rc5 -protocol, or the manchester BPF decoder. - -.. flat-table:: rc5 bits scancode mapping - :widths: 1 1 2 - - * - rc-5 bit - - - scancode bit - - - description - - * - 1 - - - none - - - Start bit, always set - - * - 1 - - - 6 (inverted) - - - 2nd start bit in rc5, re-used as 6th command bit - - * - 1 - - - none - - - Toggle bit - - * - 5 - - - 8 to 13 - - - Address - - * - 6 - - - 0 to 5 - - - Command - -There is a variant of rc5 called either rc5x or extended rc5 -where there the second stop bit is the 6th commmand bit, but inverted. -This is done so it the scancodes and encoding is compatible with existing -schemes. This bit is stored in bit 6 of the scancode, inverted. This is -done to keep it compatible with plain rc-5 where there are two start bits. - -rc-5-sz (RC_PROTO_RC5_SZ) -------------------------- -This is much like rc-5 but one bit longer. The scancode is encoded -differently. - -.. flat-table:: rc-5-sz bits scancode mapping - :widths: 1 1 2 - - * - rc-5-sz bits - - - scancode bit - - - description - - * - 1 - - - none - - - Start bit, always set - - * - 1 - - - 13 - - - Address bit - - * - 1 - - - none - - - Toggle bit - - * - 6 - - - 6 to 11 - - - Address - - * - 6 - - - 0 to 5 - - - Command - -rc-5x-20 (RC_PROTO_RC5X_20) ---------------------------- - -This rc-5 extended to encoded 20 bits. The is a 3555 microseconds space -after the 8th bit. - -.. flat-table:: rc-5x-20 bits scancode mapping - :widths: 1 1 2 - - * - rc-5-sz bits - - - scancode bit - - - description - - * - 1 - - - none - - - Start bit, always set - - * - 1 - - - 14 - - - Address bit - - * - 1 - - - none - - - Toggle bit - - * - 5 - - - 16 to 20 - - - Address - - * - 6 - - - 8 to 13 - - - Address - - * - 6 - - - 0 to 5 - - - Command - - -jvc (RC_PROTO_JVC) ------------------- - -The jvc protocol is much like nec, without the inverted values. It is -described here https://www.sbprojects.net/knowledge/ir/jvc.php. - -The scancode is a 16 bits value, where the address is the lower 8 bits -and the command the higher 8 bits; this is reversed from IR order. - -sony-12 (RC_PROTO_SONY12) -------------------------- - -The sony protocol is a pulse-width encoding. There are three variants, -which just differ in number of bits and scancode encoding. - -.. flat-table:: sony-12 bits scancode mapping - :widths: 1 1 2 - - * - sony-12 bits - - - scancode bit - - - description - - * - 5 - - - 16 to 20 - - - device - - * - 7 - - - 0 to 6 - - - function - -sony-15 (RC_PROTO_SONY15) -------------------------- - -The sony protocol is a pulse-width encoding. There are three variants, -which just differ in number of bits and scancode encoding. - -.. flat-table:: sony-12 bits scancode mapping - :widths: 1 1 2 - - * - sony-12 bits - - - scancode bit - - - description - - * - 8 - - - 16 to 23 - - - device - - * - 7 - - - 0 to 6 - - - function - -sony-20 (RC_PROTO_SONY20) -------------------------- - -The sony protocol is a pulse-width encoding. There are three variants, -which just differ in number of bits and scancode encoding. - -.. flat-table:: sony-20 bits scancode mapping - :widths: 1 1 2 - - * - sony-20 bits - - - scancode bit - - - description - - * - 5 - - - 16 to 20 - - - device - - * - 7 - - - 0 to 7 - - - device - - * - 8 - - - 8 to 15 - - - extended bits - -nec (RC_PROTO_NEC) ------------------- - -The nec protocol encodes an 8 bit address and an 8 bit command. It is -described here https://www.sbprojects.net/knowledge/ir/nec.php. Note -that the protocol sends least significant bit first. - -As a check, the nec protocol sends the address and command twice; the -second time it is inverted. This is done for verification. - -A plain nec IR message has 16 bits; the high 8 bits are the address -and the low 8 bits are the command. - -nec-x (RC_PROTO_NECX) ---------------------- - -Extended nec has a 16 bit address and a 8 bit command. This is encoded -as a 24 bit value as you would expect, with the lower 8 bits the command -and the upper 16 bits the address. - -nec-32 (RC_PROTO_NEC32) ------------------------ - -nec-32 does not send an inverted address or an inverted command; the -entire message, all 32 bits, are used. - -For this to be decoded correctly, the second 8 bits must not be the -inverted value of the first, and also the last 8 bits must not be the -inverted value of the third 8 bit value. - -The scancode has a somewhat unusual encoding. - -.. flat-table:: nec-32 bits scancode mapping - - * - nec-32 bits - - - scancode bit - - * - First 8 bits - - - 16 to 23 - - * - Second 8 bits - - - 24 to 31 - - * - Third 8 bits - - - 0 to 7 - - * - Fourth 8 bits - - - 8 to 15 - -sanyo (RC_PROTO_SANYO) ----------------------- - -The sanyo protocol is like the nec protocol, but with 13 bits address -rather than 8 bits. Both the address and the command are followed by -their inverted versions, but these are not present in the scancodes. - -Bis 8 to 20 of the scancode is the 13 bits address, and the lower 8 -bits are the command. - -mcir2-kbd (RC_PROTO_MCIR2_KBD) ------------------------------- - -This protocol is generated by the Microsoft MCE keyboard for keyboard -events. Refer to the ir-mce_kbd-decoder.c to see how it is encoded. - -mcir2-mse (RC_PROTO_MCIR2_MSE) ------------------------------- - -This protocol is generated by the Microsoft MCE keyboard for pointer -events. Refer to the ir-mce_kbd-decoder.c to see how it is encoded. - -rc-6-0 (RC_PROTO_RC6_0) ------------------------ - -This is the rc-6 in mode 0. rc-6 is described here -https://www.sbprojects.net/knowledge/ir/rc6.php. -The scancode is the exact 16 bits as in the protocol. There is also a -toggle bit. - -rc-6-6a-20 (RC_PROTO_RC6_6A_20) -------------------------------- - -This is the rc-6 in mode 6a, 20 bits. rc-6 is described here -https://www.sbprojects.net/knowledge/ir/rc6.php. -The scancode is the exact 20 bits -as in the protocol. There is also a toggle bit. - -rc-6-6a-24 (RC_PROTO_RC6_6A_24) -------------------------------- - -This is the rc-6 in mode 6a, 24 bits. rc-6 is described here -https://www.sbprojects.net/knowledge/ir/rc6.php. -The scancode is the exact 24 bits -as in the protocol. There is also a toggle bit. - -rc-6-6a-32 (RC_PROTO_RC6_6A_32) -------------------------------- - -This is the rc-6 in mode 6a, 32 bits. rc-6 is described here -https://www.sbprojects.net/knowledge/ir/rc6.php. -The upper 16 bits are the vendor, -and the lower 16 bits are the vendor-specific bits. This protocol is -for the non-Microsoft MCE variant (vendor != 0x800f). - - -rc-6-mce (RC_PROTO_RC6_MCE) ---------------------------- - -This is the rc-6 in mode 6a, 32 bits. The upper 16 bits are the vendor, -and the lower 16 bits are the vendor-specific bits. This protocol is -for the Microsoft MCE variant (vendor = 0x800f). The toggle bit in the -protocol itself is ignored, and the 16th bit should be takes as the toggle -bit. - -sharp (RC_PROTO_SHARP) ----------------------- - -This is a protocol used by Sharp VCRs, is described here -https://www.sbprojects.net/knowledge/ir/sharp.php. There is a very long -(40ms) space between the normal and inverted values, and some IR receivers -cannot decode this. - -There is a 5 bit address and a 8 bit command. In the scancode the address is -in bits 8 to 12, and the command in bits 0 to 7. - -xmp (RC_PROTO_XMP) ------------------- - -This protocol has several versions and only version 1 is supported. Refer -to the decoder (ir-xmp-decoder.c) to see how it is encoded. - - -cec (RC_PROTO_CEC) ------------------- - -This is not an IR protocol, this is a protocol over CEC. The CEC -infrastructure uses rc-core for handling CEC commands, so that they -can easily be remapped. - -imon (RC_PROTO_IMON) --------------------- - -This protocol is used by Antec Veris/SoundGraph iMON remotes. - -The protocol -describes both button presses and pointer movements. The protocol encodes -31 bits, and the scancode is simply the 31 bits with the top bit always 0. - -rc-mm-12 (RC_PROTO_RCMM12) --------------------------- - -The rc-mm protocol is described here -https://www.sbprojects.net/knowledge/ir/rcmm.php. The scancode is simply -the 12 bits. - -rc-mm-24 (RC_PROTO_RCMM24) --------------------------- - -The rc-mm protocol is described here -https://www.sbprojects.net/knowledge/ir/rcmm.php. The scancode is simply -the 24 bits. - -rc-mm-32 (RC_PROTO_RCMM32) --------------------------- - -The rc-mm protocol is described here -https://www.sbprojects.net/knowledge/ir/rcmm.php. The scancode is simply -the 32 bits. - -xbox-dvd (RC_PROTO_XBOX_DVD) ----------------------------- - -This protocol is used by XBox DVD Remote, which was made for the original -XBox. There is no in-kernel decoder or encoder for this protocol. The usb -device decodes the protocol. There is a BPF decoder available in v4l-utils. diff --git a/Documentation/media/uapi/rc/rc-sysfs-nodes.rst b/Documentation/media/uapi/rc/rc-sysfs-nodes.rst deleted file mode 100644 index b8e8319e3317..000000000000 --- a/Documentation/media/uapi/rc/rc-sysfs-nodes.rst +++ /dev/null @@ -1,151 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _remote_controllers_sysfs_nodes: - -******************************* -Remote Controller's sysfs nodes -******************************* - -As defined at ``Documentation/ABI/testing/sysfs-class-rc``, those are -the sysfs nodes that control the Remote Controllers: - - -.. _sys_class_rc: - -/sys/class/rc/ -============== - -The ``/sys/class/rc/`` class sub-directory belongs to the Remote -Controller core and provides a sysfs interface for configuring infrared -remote controller receivers. - - -.. _sys_class_rc_rcN: - -/sys/class/rc/rcN/ -================== - -A ``/sys/class/rc/rcN`` directory is created for each remote control -receiver device where N is the number of the receiver. - - -.. _sys_class_rc_rcN_protocols: - -/sys/class/rc/rcN/protocols -=========================== - -Reading this file returns a list of available protocols, something like:: - - rc5 [rc6] nec jvc [sony] - -Enabled protocols are shown in [] brackets. - -Writing "+proto" will add a protocol to the list of enabled protocols. - -Writing "-proto" will remove a protocol from the list of enabled -protocols. - -Writing "proto" will enable only "proto". - -Writing "none" will disable all protocols. - -Write fails with ``EINVAL`` if an invalid protocol combination or unknown -protocol name is used. - - -.. _sys_class_rc_rcN_filter: - -/sys/class/rc/rcN/filter -======================== - -Sets the scancode filter expected value. - -Use in combination with ``/sys/class/rc/rcN/filter_mask`` to set the -expected value of the bits set in the filter mask. If the hardware -supports it then scancodes which do not match the filter will be -ignored. Otherwise the write will fail with an error. - -This value may be reset to 0 if the current protocol is altered. - - -.. _sys_class_rc_rcN_filter_mask: - -/sys/class/rc/rcN/filter_mask -============================= - -Sets the scancode filter mask of bits to compare. Use in combination -with ``/sys/class/rc/rcN/filter`` to set the bits of the scancode which -should be compared against the expected value. A value of 0 disables the -filter to allow all valid scancodes to be processed. - -If the hardware supports it then scancodes which do not match the filter -will be ignored. Otherwise the write will fail with an error. - -This value may be reset to 0 if the current protocol is altered. - - -.. _sys_class_rc_rcN_wakeup_protocols: - -/sys/class/rc/rcN/wakeup_protocols -================================== - -Reading this file returns a list of available protocols to use for the -wakeup filter, something like:: - - rc-5 nec nec-x rc-6-0 rc-6-6a-24 [rc-6-6a-32] rc-6-mce - -Note that protocol variants are listed, so ``nec``, ``sony``, ``rc-5``, ``rc-6`` -have their different bit length encodings listed if available. - -Note that all protocol variants are listed. - -The enabled wakeup protocol is shown in [] brackets. - -Only one protocol can be selected at a time. - -Writing "proto" will use "proto" for wakeup events. - -Writing "none" will disable wakeup. - -Write fails with ``EINVAL`` if an invalid protocol combination or unknown -protocol name is used, or if wakeup is not supported by the hardware. - - -.. _sys_class_rc_rcN_wakeup_filter: - -/sys/class/rc/rcN/wakeup_filter -=============================== - -Sets the scancode wakeup filter expected value. Use in combination with -``/sys/class/rc/rcN/wakeup_filter_mask`` to set the expected value of -the bits set in the wakeup filter mask to trigger a system wake event. - -If the hardware supports it and wakeup_filter_mask is not 0 then -scancodes which match the filter will wake the system from e.g. suspend -to RAM or power off. Otherwise the write will fail with an error. - -This value may be reset to 0 if the wakeup protocol is altered. - - -.. _sys_class_rc_rcN_wakeup_filter_mask: - -/sys/class/rc/rcN/wakeup_filter_mask -==================================== - -Sets the scancode wakeup filter mask of bits to compare. Use in -combination with ``/sys/class/rc/rcN/wakeup_filter`` to set the bits of -the scancode which should be compared against the expected value to -trigger a system wake event. - -If the hardware supports it and wakeup_filter_mask is not 0 then -scancodes which match the filter will wake the system from e.g. suspend -to RAM or power off. Otherwise the write will fail with an error. - -This value may be reset to 0 if the wakeup protocol is altered. diff --git a/Documentation/media/uapi/rc/rc-table-change.rst b/Documentation/media/uapi/rc/rc-table-change.rst deleted file mode 100644 index 4a2e601b89fb..000000000000 --- a/Documentation/media/uapi/rc/rc-table-change.rst +++ /dev/null @@ -1,25 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _Remote_controllers_table_change: - -******************************************* -Changing default Remote Controller mappings -******************************************* - -The event interface provides two ioctls to be used against the -/dev/input/event device, to allow changing the default keymapping. - -This program demonstrates how to replace the keymap tables. - - -.. toctree:: - :maxdepth: 1 - - keytable.c diff --git a/Documentation/media/uapi/rc/rc-tables.rst b/Documentation/media/uapi/rc/rc-tables.rst deleted file mode 100644 index 20d7c686922b..000000000000 --- a/Documentation/media/uapi/rc/rc-tables.rst +++ /dev/null @@ -1,766 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _Remote_controllers_tables: - -************************ -Remote controller tables -************************ - -Unfortunately, for several years, there was no effort to create uniform -IR keycodes for different devices. This caused the same IR keyname to be -mapped completely differently on different IR devices. This resulted -that the same IR keyname to be mapped completely different on different -IR's. Due to that, V4L2 API now specifies a standard for mapping Media -keys on IR. - -This standard should be used by both V4L/DVB drivers and userspace -applications - -The modules register the remote as keyboard within the linux input -layer. This means that the IR key strokes will look like normal keyboard -key strokes (if CONFIG_INPUT_KEYBOARD is enabled). Using the event -devices (CONFIG_INPUT_EVDEV) it is possible for applications to access -the remote via /dev/input/event devices. - - -.. _rc_standard_keymap: - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: IR default keymapping - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - - - .. row 1 - - - Key code - - - Meaning - - - Key examples on IR - - - .. row 2 - - - **Numeric keys** - - - .. row 3 - - - ``KEY_NUMERIC_0`` - - - Keyboard digit 0 - - - 0 - - - .. row 4 - - - ``KEY_NUMERIC_1`` - - - Keyboard digit 1 - - - 1 - - - .. row 5 - - - ``KEY_NUMERIC_2`` - - - Keyboard digit 2 - - - 2 - - - .. row 6 - - - ``KEY_NUMERIC_3`` - - - Keyboard digit 3 - - - 3 - - - .. row 7 - - - ``KEY_NUMERIC_4`` - - - Keyboard digit 4 - - - 4 - - - .. row 8 - - - ``KEY_NUMERIC_5`` - - - Keyboard digit 5 - - - 5 - - - .. row 9 - - - ``KEY_NUMERIC_6`` - - - Keyboard digit 6 - - - 6 - - - .. row 10 - - - ``KEY_NUMERIC_7`` - - - Keyboard digit 7 - - - 7 - - - .. row 11 - - - ``KEY_NUMERIC_8`` - - - Keyboard digit 8 - - - 8 - - - .. row 12 - - - ``KEY_NUMERIC_9`` - - - Keyboard digit 9 - - - 9 - - - .. row 13 - - - **Movie play control** - - - .. row 14 - - - ``KEY_FORWARD`` - - - Instantly advance in time - - - >> / FORWARD - - - .. row 15 - - - ``KEY_BACK`` - - - Instantly go back in time - - - <<< / BACK - - - .. row 16 - - - ``KEY_FASTFORWARD`` - - - Play movie faster - - - >>> / FORWARD - - - .. row 17 - - - ``KEY_REWIND`` - - - Play movie back - - - REWIND / BACKWARD - - - .. row 18 - - - ``KEY_NEXT`` - - - Select next chapter / sub-chapter / interval - - - NEXT / SKIP - - - .. row 19 - - - ``KEY_PREVIOUS`` - - - Select previous chapter / sub-chapter / interval - - - << / PREV / PREVIOUS - - - .. row 20 - - - ``KEY_AGAIN`` - - - Repeat the video or a video interval - - - REPEAT / LOOP / RECALL - - - .. row 21 - - - ``KEY_PAUSE`` - - - Pause stream - - - PAUSE / FREEZE - - - .. row 22 - - - ``KEY_PLAY`` - - - Play movie at the normal timeshift - - - NORMAL TIMESHIFT / LIVE / > - - - .. row 23 - - - ``KEY_PLAYPAUSE`` - - - Alternate between play and pause - - - PLAY / PAUSE - - - .. row 24 - - - ``KEY_STOP`` - - - Stop stream - - - STOP - - - .. row 25 - - - ``KEY_RECORD`` - - - Start/stop recording stream - - - CAPTURE / REC / RECORD/PAUSE - - - .. row 26 - - - ``KEY_CAMERA`` - - - Take a picture of the image - - - CAMERA ICON / CAPTURE / SNAPSHOT - - - .. row 27 - - - ``KEY_SHUFFLE`` - - - Enable shuffle mode - - - SHUFFLE - - - .. row 28 - - - ``KEY_TIME`` - - - Activate time shift mode - - - TIME SHIFT - - - .. row 29 - - - ``KEY_TITLE`` - - - Allow changing the chapter - - - CHAPTER - - - .. row 30 - - - ``KEY_SUBTITLE`` - - - Allow changing the subtitle - - - SUBTITLE - - - .. row 31 - - - **Image control** - - - .. row 32 - - - ``KEY_BRIGHTNESSDOWN`` - - - Decrease Brightness - - - BRIGHTNESS DECREASE - - - .. row 33 - - - ``KEY_BRIGHTNESSUP`` - - - Increase Brightness - - - BRIGHTNESS INCREASE - - - .. row 34 - - - ``KEY_ANGLE`` - - - Switch video camera angle (on videos with more than one angle - stored) - - - ANGLE / SWAP - - - .. row 35 - - - ``KEY_EPG`` - - - Open the Elecrowonic Play Guide (EPG) - - - EPG / GUIDE - - - .. row 36 - - - ``KEY_TEXT`` - - - Activate/change closed caption mode - - - CLOSED CAPTION/TELETEXT / DVD TEXT / TELETEXT / TTX - - - .. row 37 - - - **Audio control** - - - .. row 38 - - - ``KEY_AUDIO`` - - - Change audio source - - - AUDIO SOURCE / AUDIO / MUSIC - - - .. row 39 - - - ``KEY_MUTE`` - - - Mute/unmute audio - - - MUTE / DEMUTE / UNMUTE - - - .. row 40 - - - ``KEY_VOLUMEDOWN`` - - - Decrease volume - - - VOLUME- / VOLUME DOWN - - - .. row 41 - - - ``KEY_VOLUMEUP`` - - - Increase volume - - - VOLUME+ / VOLUME UP - - - .. row 42 - - - ``KEY_MODE`` - - - Change sound mode - - - MONO/STEREO - - - .. row 43 - - - ``KEY_LANGUAGE`` - - - Select Language - - - 1ST / 2ND LANGUAGE / DVD LANG / MTS/SAP / MTS SEL - - - .. row 44 - - - **Channel control** - - - .. row 45 - - - ``KEY_CHANNEL`` - - - Go to the next favorite channel - - - ALT / CHANNEL / CH SURFING / SURF / FAV - - - .. row 46 - - - ``KEY_CHANNELDOWN`` - - - Decrease channel sequentially - - - CHANNEL - / CHANNEL DOWN / DOWN - - - .. row 47 - - - ``KEY_CHANNELUP`` - - - Increase channel sequentially - - - CHANNEL + / CHANNEL UP / UP - - - .. row 48 - - - ``KEY_DIGITS`` - - - Use more than one digit for channel - - - PLUS / 100/ 1xx / xxx / -/-- / Single Double Triple Digit - - - .. row 49 - - - ``KEY_SEARCH`` - - - Start channel autoscan - - - SCAN / AUTOSCAN - - - .. row 50 - - - **Colored keys** - - - .. row 51 - - - ``KEY_BLUE`` - - - IR Blue key - - - BLUE - - - .. row 52 - - - ``KEY_GREEN`` - - - IR Green Key - - - GREEN - - - .. row 53 - - - ``KEY_RED`` - - - IR Red key - - - RED - - - .. row 54 - - - ``KEY_YELLOW`` - - - IR Yellow key - - - YELLOW - - - .. row 55 - - - **Media selection** - - - .. row 56 - - - ``KEY_CD`` - - - Change input source to Compact Disc - - - CD - - - .. row 57 - - - ``KEY_DVD`` - - - Change input to DVD - - - DVD / DVD MENU - - - .. row 58 - - - ``KEY_EJECTCLOSECD`` - - - Open/close the CD/DVD player - - - -> ) / CLOSE / OPEN - - - .. row 59 - - - ``KEY_MEDIA`` - - - Turn on/off Media application - - - PC/TV / TURN ON/OFF APP - - - .. row 60 - - - ``KEY_PC`` - - - Selects from TV to PC - - - PC - - - .. row 61 - - - ``KEY_RADIO`` - - - Put into AM/FM radio mode - - - RADIO / TV/FM / TV/RADIO / FM / FM/RADIO - - - .. row 62 - - - ``KEY_TV`` - - - Select tv mode - - - TV / LIVE TV - - - .. row 63 - - - ``KEY_TV2`` - - - Select Cable mode - - - AIR/CBL - - - .. row 64 - - - ``KEY_VCR`` - - - Select VCR mode - - - VCR MODE / DTR - - - .. row 65 - - - ``KEY_VIDEO`` - - - Alternate between input modes - - - SOURCE / SELECT / DISPLAY / SWITCH INPUTS / VIDEO - - - .. row 66 - - - **Power control** - - - .. row 67 - - - ``KEY_POWER`` - - - Turn on/off computer - - - SYSTEM POWER / COMPUTER POWER - - - .. row 68 - - - ``KEY_POWER2`` - - - Turn on/off application - - - TV ON/OFF / POWER - - - .. row 69 - - - ``KEY_SLEEP`` - - - Activate sleep timer - - - SLEEP / SLEEP TIMER - - - .. row 70 - - - ``KEY_SUSPEND`` - - - Put computer into suspend mode - - - STANDBY / SUSPEND - - - .. row 71 - - - **Window control** - - - .. row 72 - - - ``KEY_CLEAR`` - - - Stop stream and return to default input video/audio - - - CLEAR / RESET / BOSS KEY - - - .. row 73 - - - ``KEY_CYCLEWINDOWS`` - - - Minimize windows and move to the next one - - - ALT-TAB / MINIMIZE / DESKTOP - - - .. row 74 - - - ``KEY_FAVORITES`` - - - Open the favorites stream window - - - TV WALL / Favorites - - - .. row 75 - - - ``KEY_MENU`` - - - Call application menu - - - 2ND CONTROLS (USA: MENU) / DVD/MENU / SHOW/HIDE CTRL - - - .. row 76 - - - ``KEY_NEW`` - - - Open/Close Picture in Picture - - - PIP - - - .. row 77 - - - ``KEY_OK`` - - - Send a confirmation code to application - - - OK / ENTER / RETURN - - - .. row 78 - - - ``KEY_ASPECT_RATIO`` - - - Select screen aspect ratio - - - 4:3 16:9 SELECT - - - .. row 79 - - - ``KEY_FULL_SCREEN`` - - - Put device into zoom/full screen mode - - - ZOOM / FULL SCREEN / ZOOM+ / HIDE PANNEL / SWITCH - - - .. row 80 - - - **Navigation keys** - - - .. row 81 - - - ``KEY_ESC`` - - - Cancel current operation - - - CANCEL / BACK - - - .. row 82 - - - ``KEY_HELP`` - - - Open a Help window - - - HELP - - - .. row 83 - - - ``KEY_HOMEPAGE`` - - - Navigate to Homepage - - - HOME - - - .. row 84 - - - ``KEY_INFO`` - - - Open On Screen Display - - - DISPLAY INFORMATION / OSD - - - .. row 85 - - - ``KEY_WWW`` - - - Open the default browser - - - WEB - - - .. row 86 - - - ``KEY_UP`` - - - Up key - - - UP - - - .. row 87 - - - ``KEY_DOWN`` - - - Down key - - - DOWN - - - .. row 88 - - - ``KEY_LEFT`` - - - Left key - - - LEFT - - - .. row 89 - - - ``KEY_RIGHT`` - - - Right key - - - RIGHT - - - .. row 90 - - - **Miscellaneous keys** - - - .. row 91 - - - ``KEY_DOT`` - - - Return a dot - - - . - - - .. row 92 - - - ``KEY_FN`` - - - Select a function - - - FUNCTION - - -It should be noted that, sometimes, there some fundamental missing keys -at some cheaper IR's. Due to that, it is recommended to: - - -.. _rc_keymap_notes: - -.. flat-table:: Notes - :header-rows: 0 - :stub-columns: 0 - - - - .. row 1 - - - On simpler IR's, without separate channel keys, you need to map UP - as ``KEY_CHANNELUP`` - - - .. row 2 - - - On simpler IR's, without separate channel keys, you need to map - DOWN as ``KEY_CHANNELDOWN`` - - - .. row 3 - - - On simpler IR's, without separate volume keys, you need to map - LEFT as ``KEY_VOLUMEDOWN`` - - - .. row 4 - - - On simpler IR's, without separate volume keys, you need to map - RIGHT as ``KEY_VOLUMEUP`` diff --git a/Documentation/media/uapi/rc/remote_controllers.rst b/Documentation/media/uapi/rc/remote_controllers.rst deleted file mode 100644 index 20e0f986df49..000000000000 --- a/Documentation/media/uapi/rc/remote_controllers.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. include:: <isonum.txt> - -.. _remote_controllers: - -################################ -Part III - Remote Controller API -################################ - -.. only:: html - - .. class:: toc-title - - Table of Contents - -.. toctree:: - :maxdepth: 5 - :numbered: - - rc-intro - rc-sysfs-nodes - rc-protos - rc-tables - rc-table-change - lirc-dev - - -********************** -Revision and Copyright -********************** - -Authors: - -- Carvalho Chehab, Mauro <mchehab@kernel.org> - - - Initial version. - -**Copyright** |copy| 2009-2016 : Mauro Carvalho Chehab - -**************** -Revision History -**************** - -:revision: 3.15 / 2014-02-06 (*mcc*) - -Added the interface description and the RC sysfs class description. - - -:revision: 1.0 / 2009-09-06 (*mcc*) - -Initial revision diff --git a/Documentation/media/uapi/v4l/app-pri.rst b/Documentation/media/uapi/v4l/app-pri.rst deleted file mode 100644 index c25c1271b4f6..000000000000 --- a/Documentation/media/uapi/v4l/app-pri.rst +++ /dev/null @@ -1,37 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _app-pri: - -******************** -Application Priority -******************** - -When multiple applications share a device it may be desirable to assign -them different priorities. Contrary to the traditional "rm -rf /" school -of thought, a video recording application could for example block other -applications from changing video controls or switching the current TV -channel. Another objective is to permit low priority applications -working in background, which can be preempted by user controlled -applications and automatically regain control of the device at a later -time. - -Since these features cannot be implemented entirely in user space V4L2 -defines the :ref:`VIDIOC_G_PRIORITY <VIDIOC_G_PRIORITY>` and -:ref:`VIDIOC_S_PRIORITY <VIDIOC_G_PRIORITY>` ioctls to request and -query the access priority associate with a file descriptor. Opening a -device assigns a medium priority, compatible with earlier versions of -V4L2 and drivers not supporting these ioctls. Applications requiring a -different priority will usually call :ref:`VIDIOC_S_PRIORITY -<VIDIOC_G_PRIORITY>` after verifying the device with the -:ref:`VIDIOC_QUERYCAP` ioctl. - -Ioctls changing driver properties, such as -:ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>`, return an ``EBUSY`` error code -after another application obtained higher priority. diff --git a/Documentation/media/uapi/v4l/async.rst b/Documentation/media/uapi/v4l/async.rst deleted file mode 100644 index be9539313f60..000000000000 --- a/Documentation/media/uapi/v4l/async.rst +++ /dev/null @@ -1,16 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _async: - -**************** -Asynchronous I/O -**************** - -This method is not defined yet. diff --git a/Documentation/media/uapi/v4l/audio.rst b/Documentation/media/uapi/v4l/audio.rst deleted file mode 100644 index 4c7fdbc8a860..000000000000 --- a/Documentation/media/uapi/v4l/audio.rst +++ /dev/null @@ -1,104 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _audio: - -************************ -Audio Inputs and Outputs -************************ - -Audio inputs and outputs are physical connectors of a device. Video -capture devices have inputs, output devices have outputs, zero or more -each. Radio devices have no audio inputs or outputs. They have exactly -one tuner which in fact *is* an audio source, but this API associates -tuners with video inputs or outputs only, and radio devices have none of -these. [#f1]_ A connector on a TV card to loop back the received audio -signal to a sound card is not considered an audio output. - -Audio and video inputs and outputs are associated. Selecting a video -source also selects an audio source. This is most evident when the video -and audio source is a tuner. Further audio connectors can combine with -more than one video input or output. Assumed two composite video inputs -and two audio inputs exist, there may be up to four valid combinations. -The relation of video and audio connectors is defined in the -``audioset`` field of the respective struct -:c:type:`v4l2_input` or struct -:c:type:`v4l2_output`, where each bit represents the index -number, starting at zero, of one audio input or output. - -To learn about the number and attributes of the available inputs and -outputs applications can enumerate them with the -:ref:`VIDIOC_ENUMAUDIO` and -:ref:`VIDIOC_ENUMAUDOUT <VIDIOC_ENUMAUDOUT>` ioctl, respectively. -The struct :c:type:`v4l2_audio` returned by the -:ref:`VIDIOC_ENUMAUDIO` ioctl also contains signal -status information applicable when the current audio input is queried. - -The :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` and -:ref:`VIDIOC_G_AUDOUT <VIDIOC_G_AUDOUT>` ioctls report the current -audio input and output, respectively. - -.. note:: - - Note that, unlike :ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` and - :ref:`VIDIOC_G_OUTPUT <VIDIOC_G_OUTPUT>` these ioctls return a - structure as :ref:`VIDIOC_ENUMAUDIO` and - :ref:`VIDIOC_ENUMAUDOUT <VIDIOC_ENUMAUDOUT>` do, not just an index. - -To select an audio input and change its properties applications call the -:ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` ioctl. To select an audio -output (which presently has no changeable properties) applications call -the :ref:`VIDIOC_S_AUDOUT <VIDIOC_G_AUDOUT>` ioctl. - -Drivers must implement all audio input ioctls when the device has -multiple selectable audio inputs, all audio output ioctls when the -device has multiple selectable audio outputs. When the device has any -audio inputs or outputs the driver must set the ``V4L2_CAP_AUDIO`` flag -in the struct :c:type:`v4l2_capability` returned by -the :ref:`VIDIOC_QUERYCAP` ioctl. - - -Example: Information about the current audio input -================================================== - -.. code-block:: c - - struct v4l2_audio audio; - - memset(&audio, 0, sizeof(audio)); - - if (-1 == ioctl(fd, VIDIOC_G_AUDIO, &audio)) { - perror("VIDIOC_G_AUDIO"); - exit(EXIT_FAILURE); - } - - printf("Current input: %s\\n", audio.name); - - -Example: Switching to the first audio input -=========================================== - -.. code-block:: c - - struct v4l2_audio audio; - - memset(&audio, 0, sizeof(audio)); /* clear audio.mode, audio.reserved */ - - audio.index = 0; - - if (-1 == ioctl(fd, VIDIOC_S_AUDIO, &audio)) { - perror("VIDIOC_S_AUDIO"); - exit(EXIT_FAILURE); - } - -.. [#f1] - Actually struct :c:type:`v4l2_audio` ought to have a - ``tuner`` field like struct :c:type:`v4l2_input`, not - only making the API more consistent but also permitting radio devices - with multiple tuners. diff --git a/Documentation/media/uapi/v4l/bayer.svg b/Documentation/media/uapi/v4l/bayer.svg deleted file mode 100644 index c5bf85103901..000000000000 --- a/Documentation/media/uapi/v4l/bayer.svg +++ /dev/null @@ -1,56 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!-- - This file is dual-licensed: you can use it either under the terms - of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this - dual licensing only applies to this file, and not this project as a - whole. - - a) This file is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation version 2 of - the License. - - This file is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - Or, alternatively, - - b) Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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stroke="#0c0"/></g></g></svg> diff --git a/Documentation/media/uapi/v4l/biblio.rst b/Documentation/media/uapi/v4l/biblio.rst deleted file mode 100644 index 8095f57d3d75..000000000000 --- a/Documentation/media/uapi/v4l/biblio.rst +++ /dev/null @@ -1,416 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -********** -References -********** - - -.. _cea608: - -CEA 608-E -========= - - -:title: CEA-608-E R-2014 "Line 21 Data Services" - -:author: Consumer Electronics Association (http://www.ce.org) - -.. _en300294: - -EN 300 294 -========== - - -:title: EN 300 294 "625-line television Wide Screen Signalling (WSS)" - -:author: European Telecommunication Standards Institute (http://www.etsi.org) - -.. _ets300231: - -ETS 300 231 -=========== - - -:title: ETS 300 231 "Specification of the domestic video Programme Delivery Control system (PDC)" - -:author: European Telecommunication Standards Institute (http://www.etsi.org) - -.. _ets300706: - -ETS 300 706 -=========== - - -:title: ETS 300 706 "Enhanced Teletext specification" - -:author: European Telecommunication Standards Institute (http://www.etsi.org) - -.. _mpeg2part1: - -ISO 13818-1 -=========== - - -:title: ITU-T Rec. H.222.0 | ISO/IEC 13818-1 "Information technology — Generic coding of moving pictures and associated audio information: Systems" - -:author: International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch) - -.. _mpeg2part2: - -ISO 13818-2 -=========== - - -:title: ITU-T Rec. H.262 | ISO/IEC 13818-2 "Information technology — Generic coding of moving pictures and associated audio information: Video" - -:author: International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch) - -.. _itu470: - -ITU BT.470 -========== - - -:title: ITU-R Recommendation BT.470-6 "Conventional Television Systems" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _itu601: - -ITU BT.601 -========== - - -:title: ITU-R Recommendation BT.601-5 "Studio Encoding Parameters of Digital Television for Standard 4:3 and Wide-Screen 16:9 Aspect Ratios" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _itu653: - -ITU BT.653 -========== - - -:title: ITU-R Recommendation BT.653-3 "Teletext systems" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _itu709: - -ITU BT.709 -========== - - -:title: ITU-R Recommendation BT.709-5 "Parameter values for the HDTV standards for production and international programme exchange" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _itu1119: - -ITU BT.1119 -=========== - - -:title: ITU-R Recommendation BT.1119 "625-line television Wide Screen Signalling (WSS)" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _h264: - -ITU-T Rec. H.264 Specification (04/2017 Edition) -================================================ - -:title: ITU-T Recommendation H.264 "Advanced Video Coding for Generic Audiovisual Services" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _hevc: - -ITU H.265/HEVC -============== - -:title: ITU-T Rec. H.265 | ISO/IEC 23008-2 "High Efficiency Video Coding" - -:author: International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch) - -.. _jfif: - -JFIF -==== - - -:title: JPEG File Interchange Format -:subtitle: Version 1.02 - -:author: Independent JPEG Group (http://www.ijg.org) - -.. _itu-t81: - -ITU-T.81 -======== - - -:title: ITU-T Recommendation T.81 "Information Technology — Digital Compression and Coding of Continous-Tone Still Images — Requirements and Guidelines" - -:author: International Telecommunication Union (http://www.itu.int) - -.. _w3c-jpeg-jfif: - -W3C JPEG JFIF -============= - - -:title: JPEG JFIF - -:author: The World Wide Web Consortium (http://www.w3.org) - -.. _smpte12m: - -SMPTE 12M -========= - - -:title: SMPTE 12M-1999 "Television, Audio and Film - Time and Control Code" - -:author: Society of Motion Picture and Television Engineers (http://www.smpte.org) - -.. _smpte170m: - -SMPTE 170M -========== - - -:title: SMPTE 170M-1999 "Television - Composite Analog Video Signal - NTSC for Studio Applications" - -:author: Society of Motion Picture and Television Engineers (http://www.smpte.org) - -.. _smpte240m: - -SMPTE 240M -========== - - -:title: SMPTE 240M-1999 "Television - Signal Parameters - 1125-Line High-Definition Production" - -:author: Society of Motion Picture and Television Engineers (http://www.smpte.org) - -.. _smpte431: - -SMPTE RP 431-2 -============== - - -:title: SMPTE RP 431-2:2011 "D-Cinema Quality - Reference Projector and Environment" - -:author: Society of Motion Picture and Television Engineers (http://www.smpte.org) - -.. _smpte2084: - -SMPTE ST 2084 -============= - - -:title: SMPTE ST 2084:2014 "High Dynamic Range Electro-Optical Transfer Function of Master Reference Displays" - -:author: Society of Motion Picture and Television Engineers (http://www.smpte.org) - -.. _srgb: - -sRGB -==== - - -:title: IEC 61966-2-1 ed1.0 "Multimedia systems and equipment - Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB" - -:author: International Electrotechnical Commission (http://www.iec.ch) - -.. _sycc: - -sYCC -==== - - -:title: IEC 61966-2-1-am1 ed1.0 "Amendment 1 - Multimedia systems and equipment - Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB" - -:author: International Electrotechnical Commission (http://www.iec.ch) - -.. _xvycc: - -xvYCC -===== - - -:title: IEC 61966-2-4 ed1.0 "Multimedia systems and equipment - Colour measurement and management - Part 2-4: Colour management - Extended-gamut YCC colour space for video applications - xvYCC" - -:author: International Electrotechnical Commission (http://www.iec.ch) - -.. _oprgb: - -opRGB -===== - - -:title: IEC 61966-2-5 "Multimedia systems and equipment - Colour measurement and management - Part 2-5: Colour management - Optional RGB colour space - opRGB" - -:author: International Electrotechnical Commission (http://www.iec.ch) - -.. _itu2020: - -ITU BT.2020 -=========== - - -:title: ITU-R Recommendation BT.2020 (08/2012) "Parameter values for ultra-high definition television systems for production and international programme exchange" - -:author: International Telecommunication Union (http://www.itu.ch) - -.. _tech3213: - -EBU Tech 3213 -============= - - -:title: E.B.U. Standard for Chromaticity Tolerances for Studio Monitors" - -:author: European Broadcast Union (http://www.ebu.ch) - -.. _iec62106: - -IEC 62106 -========= - - -:title: Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87,5 to 108,0 MHz - -:author: International Electrotechnical Commission (http://www.iec.ch) - -.. _nrsc4: - -NRSC-4-B -======== - - -:title: NRSC-4-B: United States RBDS Standard - -:author: National Radio Systems Committee (http://www.nrscstandards.org) - -.. _iso12232: - -ISO 12232:2006 -============== - - -:title: Photography — Digital still cameras — Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index - -:author: International Organization for Standardization (http://www.iso.org) - -.. _cea861: - -CEA-861-E -========= - - -:title: A DTV Profile for Uncompressed High Speed Digital Interfaces - -:author: Consumer Electronics Association (http://www.ce.org) - -.. _vesadmt: - -VESA DMT -======== - - -:title: VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT) - -:author: Video Electronics Standards Association (http://www.vesa.org) - -.. _vesaedid: - -EDID -==== - - -:title: VESA Enhanced Extended Display Identification Data Standard -:subtitle: Release A, Revision 2 - -:author: Video Electronics Standards Association (http://www.vesa.org) - -.. _hdcp: - -HDCP -==== - - -:title: High-bandwidth Digital Content Protection System -:subtitle: Revision 1.3 - -:author: Digital Content Protection LLC (http://www.digital-cp.com) - -.. _hdmi: - -HDMI -==== - - -:title: High-Definition Multimedia Interface -:subtitle: Specification Version 1.4a - -:author: HDMI Licensing LLC (http://www.hdmi.org) - -.. _hdmi2: - -HDMI2 -===== - -:title: High-Definition Multimedia Interface -:subtitle: Specification Version 2.0 - -:author: HDMI Licensing LLC (http://www.hdmi.org) - -.. _dp: - -DP -== - - -:title: VESA DisplayPort Standard -:subtitle: Version 1, Revision 2 - -:author: Video Electronics Standards Association (http://www.vesa.org) - -.. _poynton: - -poynton -======= - - -:title: Digital Video and HDTV, Algorithms and Interfaces - -:author: Charles Poynton - -.. _colimg: - -colimg -====== - - -:title: Color Imaging: Fundamentals and Applications - -:author: Erik Reinhard et al. - -.. _vp8: - -VP8 -=== - - -:title: RFC 6386: "VP8 Data Format and Decoding Guide" - -:author: J. Bankoski et al. diff --git a/Documentation/media/uapi/v4l/buffer.rst b/Documentation/media/uapi/v4l/buffer.rst deleted file mode 100644 index 3112300c2fa0..000000000000 --- a/Documentation/media/uapi/v4l/buffer.rst +++ /dev/null @@ -1,817 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _buffer: - -******* -Buffers -******* - -A buffer contains data exchanged by application and driver using one of -the Streaming I/O methods. In the multi-planar API, the data is held in -planes, while the buffer structure acts as a container for the planes. -Only pointers to buffers (planes) are exchanged, the data itself is not -copied. These pointers, together with meta-information like timestamps -or field parity, are stored in a struct :c:type:`v4l2_buffer`, -argument to the :ref:`VIDIOC_QUERYBUF`, -:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` and -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. In the multi-planar API, -some plane-specific members of struct :c:type:`v4l2_buffer`, -such as pointers and sizes for each plane, are stored in struct -struct :c:type:`v4l2_plane` instead. In that case, struct -struct :c:type:`v4l2_buffer` contains an array of plane structures. - -Dequeued video buffers come with timestamps. The driver decides at which -part of the frame and with which clock the timestamp is taken. Please -see flags in the masks ``V4L2_BUF_FLAG_TIMESTAMP_MASK`` and -``V4L2_BUF_FLAG_TSTAMP_SRC_MASK`` in :ref:`buffer-flags`. These flags -are always valid and constant across all buffers during the whole video -stream. Changes in these flags may take place as a side effect of -:ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` or -:ref:`VIDIOC_S_OUTPUT <VIDIOC_G_OUTPUT>` however. The -``V4L2_BUF_FLAG_TIMESTAMP_COPY`` timestamp type which is used by e.g. on -mem-to-mem devices is an exception to the rule: the timestamp source -flags are copied from the OUTPUT video buffer to the CAPTURE video -buffer. - - -Interactions between formats, controls and buffers -================================================== - -V4L2 exposes parameters that influence the buffer size, or the way data is -laid out in the buffer. Those parameters are exposed through both formats and -controls. One example of such a control is the ``V4L2_CID_ROTATE`` control -that modifies the direction in which pixels are stored in the buffer, as well -as the buffer size when the selected format includes padding at the end of -lines. - -The set of information needed to interpret the content of a buffer (e.g. the -pixel format, the line stride, the tiling orientation or the rotation) is -collectively referred to in the rest of this section as the buffer layout. - -Controls that can modify the buffer layout shall set the -``V4L2_CTRL_FLAG_MODIFY_LAYOUT`` flag. - -Modifying formats or controls that influence the buffer size or layout require -the stream to be stopped. Any attempt at such a modification while the stream -is active shall cause the ioctl setting the format or the control to return -the ``EBUSY`` error code. In that case drivers shall also set the -``V4L2_CTRL_FLAG_GRABBED`` flag when calling -:c:func:`VIDIOC_QUERYCTRL` or :c:func:`VIDIOC_QUERY_EXT_CTRL` for such a -control while the stream is active. - -.. note:: - - The :c:func:`VIDIOC_S_SELECTION` ioctl can, depending on the hardware (for - instance if the device doesn't include a scaler), modify the format in - addition to the selection rectangle. Similarly, the - :c:func:`VIDIOC_S_INPUT`, :c:func:`VIDIOC_S_OUTPUT`, :c:func:`VIDIOC_S_STD` - and :c:func:`VIDIOC_S_DV_TIMINGS` ioctls can also modify the format and - selection rectangles. When those ioctls result in a buffer size or layout - change, drivers shall handle that condition as they would handle it in the - :c:func:`VIDIOC_S_FMT` ioctl in all cases described in this section. - -Controls that only influence the buffer layout can be modified at any time -when the stream is stopped. As they don't influence the buffer size, no -special handling is needed to synchronize those controls with buffer -allocation and the ``V4L2_CTRL_FLAG_GRABBED`` flag is cleared once the -stream is stopped. - -Formats and controls that influence the buffer size interact with buffer -allocation. The simplest way to handle this is for drivers to always require -buffers to be reallocated in order to change those formats or controls. In -that case, to perform such changes, userspace applications shall first stop -the video stream with the :c:func:`VIDIOC_STREAMOFF` ioctl if it is running -and free all buffers with the :c:func:`VIDIOC_REQBUFS` ioctl if they are -allocated. After freeing all buffers the ``V4L2_CTRL_FLAG_GRABBED`` flag -for controls is cleared. The format or controls can then be modified, and -buffers shall then be reallocated and the stream restarted. A typical ioctl -sequence is - - #. VIDIOC_STREAMOFF - #. VIDIOC_REQBUFS(0) - #. VIDIOC_S_EXT_CTRLS - #. VIDIOC_S_FMT - #. VIDIOC_REQBUFS(n) - #. VIDIOC_QBUF - #. VIDIOC_STREAMON - -The second :c:func:`VIDIOC_REQBUFS` call will take the new format and control -value into account to compute the buffer size to allocate. Applications can -also retrieve the size by calling the :c:func:`VIDIOC_G_FMT` ioctl if needed. - -.. note:: - - The API doesn't mandate the above order for control (3.) and format (4.) - changes. Format and controls can be set in a different order, or even - interleaved, depending on the device and use case. For instance some - controls might behave differently for different pixel formats, in which - case the format might need to be set first. - -When reallocation is required, any attempt to modify format or controls that -influences the buffer size while buffers are allocated shall cause the format -or control set ioctl to return the ``EBUSY`` error. Any attempt to queue a -buffer too small for the current format or controls shall cause the -:c:func:`VIDIOC_QBUF` ioctl to return a ``EINVAL`` error. - -Buffer reallocation is an expensive operation. To avoid that cost, drivers can -(and are encouraged to) allow format or controls that influence the buffer -size to be changed with buffers allocated. In that case, a typical ioctl -sequence to modify format and controls is - - #. VIDIOC_STREAMOFF - #. VIDIOC_S_EXT_CTRLS - #. VIDIOC_S_FMT - #. VIDIOC_QBUF - #. VIDIOC_STREAMON - -For this sequence to operate correctly, queued buffers need to be large enough -for the new format or controls. Drivers shall return a ``ENOSPC`` error in -response to format change (:c:func:`VIDIOC_S_FMT`) or control changes -(:c:func:`VIDIOC_S_CTRL` or :c:func:`VIDIOC_S_EXT_CTRLS`) if buffers too small -for the new format are currently queued. As a simplification, drivers are -allowed to return a ``EBUSY`` error from these ioctls if any buffer is -currently queued, without checking the queued buffers sizes. - -Additionally, drivers shall return a ``EINVAL`` error from the -:c:func:`VIDIOC_QBUF` ioctl if the buffer being queued is too small for the -current format or controls. Together, these requirements ensure that queued -buffers will always be large enough for the configured format and controls. - -Userspace applications can query the buffer size required for a given format -and controls by first setting the desired control values and then trying the -desired format. The :c:func:`VIDIOC_TRY_FMT` ioctl will return the required -buffer size. - - #. VIDIOC_S_EXT_CTRLS(x) - #. VIDIOC_TRY_FMT() - #. VIDIOC_S_EXT_CTRLS(y) - #. VIDIOC_TRY_FMT() - -The :c:func:`VIDIOC_CREATE_BUFS` ioctl can then be used to allocate buffers -based on the queried sizes (for instance by allocating a set of buffers large -enough for all the desired formats and controls, or by allocating separate set -of appropriately sized buffers for each use case). - - -.. c:type:: v4l2_buffer - -struct v4l2_buffer -================== - -.. tabularcolumns:: |p{2.8cm}|p{2.5cm}|p{1.6cm}|p{10.2cm}| - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_buffer - :header-rows: 0 - :stub-columns: 0 - :widths: 1 2 10 - - * - __u32 - - ``index`` - - Number of the buffer, set by the application except when calling - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, then it is set by the - driver. This field can range from zero to the number of buffers - allocated with the :ref:`VIDIOC_REQBUFS` ioctl - (struct :c:type:`v4l2_requestbuffers` - ``count``), plus any buffers allocated with - :ref:`VIDIOC_CREATE_BUFS` minus one. - * - __u32 - - ``type`` - - Type of the buffer, same as struct - :c:type:`v4l2_format` ``type`` or struct - :c:type:`v4l2_requestbuffers` ``type``, set - by the application. See :c:type:`v4l2_buf_type` - * - __u32 - - ``bytesused`` - - The number of bytes occupied by the data in the buffer. It depends - on the negotiated data format and may change with each buffer for - compressed variable size data like JPEG images. Drivers must set - this field when ``type`` refers to a capture stream, applications - when it refers to an output stream. If the application sets this - to 0 for an output stream, then ``bytesused`` will be set to the - size of the buffer (see the ``length`` field of this struct) by - the driver. For multiplanar formats this field is ignored and the - ``planes`` pointer is used instead. - * - __u32 - - ``flags`` - - Flags set by the application or driver, see :ref:`buffer-flags`. - * - __u32 - - ``field`` - - Indicates the field order of the image in the buffer, see - :c:type:`v4l2_field`. This field is not used when the buffer - contains VBI data. Drivers must set it when ``type`` refers to a - capture stream, applications when it refers to an output stream. - * - struct timeval - - ``timestamp`` - - For capture streams this is time when the first data byte was - captured, as returned by the :c:func:`clock_gettime()` function - for the relevant clock id; see ``V4L2_BUF_FLAG_TIMESTAMP_*`` in - :ref:`buffer-flags`. For output streams the driver stores the - time at which the last data byte was actually sent out in the - ``timestamp`` field. This permits applications to monitor the - drift between the video and system clock. For output streams that - use ``V4L2_BUF_FLAG_TIMESTAMP_COPY`` the application has to fill - in the timestamp which will be copied by the driver to the capture - stream. - * - struct :c:type:`v4l2_timecode` - - ``timecode`` - - When the ``V4L2_BUF_FLAG_TIMECODE`` flag is set in ``flags``, this - structure contains a frame timecode. In - :c:type:`V4L2_FIELD_ALTERNATE <v4l2_field>` mode the top and - bottom field contain the same timecode. Timecodes are intended to - help video editing and are typically recorded on video tapes, but - also embedded in compressed formats like MPEG. This field is - independent of the ``timestamp`` and ``sequence`` fields. - * - __u32 - - ``sequence`` - - Set by the driver, counting the frames (not fields!) in sequence. - This field is set for both input and output devices. - * - :cspan:`2` - - In :c:type:`V4L2_FIELD_ALTERNATE <v4l2_field>` mode the top and - bottom field have the same sequence number. The count starts at - zero and includes dropped or repeated frames. A dropped frame was - received by an input device but could not be stored due to lack of - free buffer space. A repeated frame was displayed again by an - output device because the application did not pass new data in - time. - - .. note:: - - This may count the frames received e.g. over USB, without - taking into account the frames dropped by the remote hardware due - to limited compression throughput or bus bandwidth. These devices - identify by not enumerating any video standards, see - :ref:`standard`. - - * - __u32 - - ``memory`` - - This field must be set by applications and/or drivers in - accordance with the selected I/O method. See :c:type:`v4l2_memory` - * - union { - - ``m`` - * - __u32 - - ``offset`` - - For the single-planar API and when ``memory`` is - ``V4L2_MEMORY_MMAP`` this is the offset of the buffer from the - start of the device memory. The value is returned by the driver - and apart of serving as parameter to the - :ref:`mmap() <func-mmap>` function not useful for applications. - See :ref:`mmap` for details - * - unsigned long - - ``userptr`` - - For the single-planar API and when ``memory`` is - ``V4L2_MEMORY_USERPTR`` this is a pointer to the buffer (casted to - unsigned long type) in virtual memory, set by the application. See - :ref:`userp` for details. - * - struct v4l2_plane - - ``*planes`` - - When using the multi-planar API, contains a userspace pointer to - an array of struct :c:type:`v4l2_plane`. The size of - the array should be put in the ``length`` field of this - struct :c:type:`v4l2_buffer` structure. - * - int - - ``fd`` - - For the single-plane API and when ``memory`` is - ``V4L2_MEMORY_DMABUF`` this is the file descriptor associated with - a DMABUF buffer. - * - } - - - * - __u32 - - ``length`` - - Size of the buffer (not the payload) in bytes for the - single-planar API. This is set by the driver based on the calls to - :ref:`VIDIOC_REQBUFS` and/or - :ref:`VIDIOC_CREATE_BUFS`. For the - multi-planar API the application sets this to the number of - elements in the ``planes`` array. The driver will fill in the - actual number of valid elements in that array. - * - __u32 - - ``reserved2`` - - A place holder for future extensions. Drivers and applications - must set this to 0. - * - __u32 - - ``request_fd`` - - The file descriptor of the request to queue the buffer to. If the flag - ``V4L2_BUF_FLAG_REQUEST_FD`` is set, then the buffer will be - queued to this request. If the flag is not set, then this field will - be ignored. - - The ``V4L2_BUF_FLAG_REQUEST_FD`` flag and this field are only used by - :ref:`ioctl VIDIOC_QBUF <VIDIOC_QBUF>` and ignored by other ioctls that - take a :c:type:`v4l2_buffer` as argument. - - Applications should not set ``V4L2_BUF_FLAG_REQUEST_FD`` for any ioctls - other than :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`. - - If the device does not support requests, then ``EBADR`` will be returned. - If requests are supported but an invalid request file descriptor is - given, then ``EINVAL`` will be returned. - - - -.. c:type:: v4l2_plane - -struct v4l2_plane -================= - -.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}| - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``bytesused`` - - The number of bytes occupied by data in the plane (its payload). - Drivers must set this field when ``type`` refers to a capture - stream, applications when it refers to an output stream. If the - application sets this to 0 for an output stream, then - ``bytesused`` will be set to the size of the plane (see the - ``length`` field of this struct) by the driver. - - .. note:: - - Note that the actual image data starts at ``data_offset`` - which may not be 0. - * - __u32 - - ``length`` - - Size in bytes of the plane (not its payload). This is set by the - driver based on the calls to - :ref:`VIDIOC_REQBUFS` and/or - :ref:`VIDIOC_CREATE_BUFS`. - * - union { - - ``m`` - * - __u32 - - ``mem_offset`` - - When the memory type in the containing struct - :c:type:`v4l2_buffer` is ``V4L2_MEMORY_MMAP``, this - is the value that should be passed to :ref:`mmap() <func-mmap>`, - similar to the ``offset`` field in struct - :c:type:`v4l2_buffer`. - * - unsigned long - - ``userptr`` - - When the memory type in the containing struct - :c:type:`v4l2_buffer` is ``V4L2_MEMORY_USERPTR``, - this is a userspace pointer to the memory allocated for this plane - by an application. - * - int - - ``fd`` - - When the memory type in the containing struct - :c:type:`v4l2_buffer` is ``V4L2_MEMORY_DMABUF``, - this is a file descriptor associated with a DMABUF buffer, similar - to the ``fd`` field in struct :c:type:`v4l2_buffer`. - * - } - - - * - __u32 - - ``data_offset`` - - Offset in bytes to video data in the plane. Drivers must set this - field when ``type`` refers to a capture stream, applications when - it refers to an output stream. - - .. note:: - - That data_offset is included in ``bytesused``. So the - size of the image in the plane is ``bytesused``-``data_offset`` - at offset ``data_offset`` from the start of the plane. - * - __u32 - - ``reserved[11]`` - - Reserved for future use. Should be zeroed by drivers and - applications. - - - -.. c:type:: v4l2_buf_type - -enum v4l2_buf_type -================== - -.. cssclass:: longtable - -.. tabularcolumns:: |p{7.8cm}|p{0.6cm}|p{9.1cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 4 1 9 - - * - ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` - - 1 - - Buffer of a single-planar video capture stream, see - :ref:`capture`. - * - ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` - - 9 - - Buffer of a multi-planar video capture stream, see - :ref:`capture`. - * - ``V4L2_BUF_TYPE_VIDEO_OUTPUT`` - - 2 - - Buffer of a single-planar video output stream, see - :ref:`output`. - * - ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`` - - 10 - - Buffer of a multi-planar video output stream, see :ref:`output`. - * - ``V4L2_BUF_TYPE_VIDEO_OVERLAY`` - - 3 - - Buffer for video overlay, see :ref:`overlay`. - * - ``V4L2_BUF_TYPE_VBI_CAPTURE`` - - 4 - - Buffer of a raw VBI capture stream, see :ref:`raw-vbi`. - * - ``V4L2_BUF_TYPE_VBI_OUTPUT`` - - 5 - - Buffer of a raw VBI output stream, see :ref:`raw-vbi`. - * - ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` - - 6 - - Buffer of a sliced VBI capture stream, see :ref:`sliced`. - * - ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT`` - - 7 - - Buffer of a sliced VBI output stream, see :ref:`sliced`. - * - ``V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY`` - - 8 - - Buffer for video output overlay (OSD), see :ref:`osd`. - * - ``V4L2_BUF_TYPE_SDR_CAPTURE`` - - 11 - - Buffer for Software Defined Radio (SDR) capture stream, see - :ref:`sdr`. - * - ``V4L2_BUF_TYPE_SDR_OUTPUT`` - - 12 - - Buffer for Software Defined Radio (SDR) output stream, see - :ref:`sdr`. - * - ``V4L2_BUF_TYPE_META_CAPTURE`` - - 13 - - Buffer for metadata capture, see :ref:`metadata`. - * - ``V4L2_BUF_TYPE_META_OUTPUT`` - - 14 - - Buffer for metadata output, see :ref:`metadata`. - - - -.. _buffer-flags: - -Buffer Flags -============ - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{7.0cm}|p{2.1cm}|p{8.4cm}| - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`V4L2-BUF-FLAG-MAPPED`: - - - ``V4L2_BUF_FLAG_MAPPED`` - - 0x00000001 - - The buffer resides in device memory and has been mapped into the - application's address space, see :ref:`mmap` for details. - Drivers set or clear this flag when the - :ref:`VIDIOC_QUERYBUF`, - :ref:`VIDIOC_QBUF` or - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl is called. Set by the - driver. - * .. _`V4L2-BUF-FLAG-QUEUED`: - - - ``V4L2_BUF_FLAG_QUEUED`` - - 0x00000002 - - Internally drivers maintain two buffer queues, an incoming and - outgoing queue. When this flag is set, the buffer is currently on - the incoming queue. It automatically moves to the outgoing queue - after the buffer has been filled (capture devices) or displayed - (output devices). Drivers set or clear this flag when the - ``VIDIOC_QUERYBUF`` ioctl is called. After (successful) calling - the ``VIDIOC_QBUF``\ ioctl it is always set and after - ``VIDIOC_DQBUF`` always cleared. - * .. _`V4L2-BUF-FLAG-DONE`: - - - ``V4L2_BUF_FLAG_DONE`` - - 0x00000004 - - When this flag is set, the buffer is currently on the outgoing - queue, ready to be dequeued from the driver. Drivers set or clear - this flag when the ``VIDIOC_QUERYBUF`` ioctl is called. After - calling the ``VIDIOC_QBUF`` or ``VIDIOC_DQBUF`` it is always - cleared. Of course a buffer cannot be on both queues at the same - time, the ``V4L2_BUF_FLAG_QUEUED`` and ``V4L2_BUF_FLAG_DONE`` flag - are mutually exclusive. They can be both cleared however, then the - buffer is in "dequeued" state, in the application domain so to - say. - * .. _`V4L2-BUF-FLAG-ERROR`: - - - ``V4L2_BUF_FLAG_ERROR`` - - 0x00000040 - - When this flag is set, the buffer has been dequeued successfully, - although the data might have been corrupted. This is recoverable, - streaming may continue as normal and the buffer may be reused - normally. Drivers set this flag when the ``VIDIOC_DQBUF`` ioctl is - called. - * .. _`V4L2-BUF-FLAG-IN-REQUEST`: - - - ``V4L2_BUF_FLAG_IN_REQUEST`` - - 0x00000080 - - This buffer is part of a request that hasn't been queued yet. - * .. _`V4L2-BUF-FLAG-KEYFRAME`: - - - ``V4L2_BUF_FLAG_KEYFRAME`` - - 0x00000008 - - Drivers set or clear this flag when calling the ``VIDIOC_DQBUF`` - ioctl. It may be set by video capture devices when the buffer - contains a compressed image which is a key frame (or field), i. e. - can be decompressed on its own. Also known as an I-frame. - Applications can set this bit when ``type`` refers to an output - stream. - * .. _`V4L2-BUF-FLAG-PFRAME`: - - - ``V4L2_BUF_FLAG_PFRAME`` - - 0x00000010 - - Similar to ``V4L2_BUF_FLAG_KEYFRAME`` this flags predicted frames - or fields which contain only differences to a previous key frame. - Applications can set this bit when ``type`` refers to an output - stream. - * .. _`V4L2-BUF-FLAG-BFRAME`: - - - ``V4L2_BUF_FLAG_BFRAME`` - - 0x00000020 - - Similar to ``V4L2_BUF_FLAG_KEYFRAME`` this flags a bi-directional - predicted frame or field which contains only the differences - between the current frame and both the preceding and following key - frames to specify its content. Applications can set this bit when - ``type`` refers to an output stream. - * .. _`V4L2-BUF-FLAG-TIMECODE`: - - - ``V4L2_BUF_FLAG_TIMECODE`` - - 0x00000100 - - The ``timecode`` field is valid. Drivers set or clear this flag - when the ``VIDIOC_DQBUF`` ioctl is called. Applications can set - this bit and the corresponding ``timecode`` structure when - ``type`` refers to an output stream. - * .. _`V4L2-BUF-FLAG-PREPARED`: - - - ``V4L2_BUF_FLAG_PREPARED`` - - 0x00000400 - - The buffer has been prepared for I/O and can be queued by the - application. Drivers set or clear this flag when the - :ref:`VIDIOC_QUERYBUF`, - :ref:`VIDIOC_PREPARE_BUF <VIDIOC_QBUF>`, - :ref:`VIDIOC_QBUF` or - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl is called. - * .. _`V4L2-BUF-FLAG-NO-CACHE-INVALIDATE`: - - - ``V4L2_BUF_FLAG_NO_CACHE_INVALIDATE`` - - 0x00000800 - - Caches do not have to be invalidated for this buffer. Typically - applications shall use this flag if the data captured in the - buffer is not going to be touched by the CPU, instead the buffer - will, probably, be passed on to a DMA-capable hardware unit for - further processing or output. - * .. _`V4L2-BUF-FLAG-NO-CACHE-CLEAN`: - - - ``V4L2_BUF_FLAG_NO_CACHE_CLEAN`` - - 0x00001000 - - Caches do not have to be cleaned for this buffer. Typically - applications shall use this flag for output buffers if the data in - this buffer has not been created by the CPU but by some - DMA-capable unit, in which case caches have not been used. - * .. _`V4L2-BUF-FLAG-M2M-HOLD-CAPTURE-BUF`: - - - ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` - - 0x00000200 - - Only valid if ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` is - set. It is typically used with stateless decoders where multiple - output buffers each decode to a slice of the decoded frame. - Applications can set this flag when queueing the output buffer - to prevent the driver from dequeueing the capture buffer after - the output buffer has been decoded (i.e. the capture buffer is - 'held'). If the timestamp of this output buffer differs from that - of the previous output buffer, then that indicates the start of a - new frame and the previously held capture buffer is dequeued. - * .. _`V4L2-BUF-FLAG-LAST`: - - - ``V4L2_BUF_FLAG_LAST`` - - 0x00100000 - - Last buffer produced by the hardware. mem2mem codec drivers set - this flag on the capture queue for the last buffer when the - :ref:`VIDIOC_QUERYBUF` or - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl is called. Due to - hardware limitations, the last buffer may be empty. In this case - the driver will set the ``bytesused`` field to 0, regardless of - the format. Any Any subsequent call to the - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl will not block anymore, - but return an ``EPIPE`` error code. - * .. _`V4L2-BUF-FLAG-REQUEST-FD`: - - - ``V4L2_BUF_FLAG_REQUEST_FD`` - - 0x00800000 - - The ``request_fd`` field contains a valid file descriptor. - * .. _`V4L2-BUF-FLAG-TIMESTAMP-MASK`: - - - ``V4L2_BUF_FLAG_TIMESTAMP_MASK`` - - 0x0000e000 - - Mask for timestamp types below. To test the timestamp type, mask - out bits not belonging to timestamp type by performing a logical - and operation with buffer flags and timestamp mask. - * .. _`V4L2-BUF-FLAG-TIMESTAMP-UNKNOWN`: - - - ``V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN`` - - 0x00000000 - - Unknown timestamp type. This type is used by drivers before Linux - 3.9 and may be either monotonic (see below) or realtime (wall - clock). Monotonic clock has been favoured in embedded systems - whereas most of the drivers use the realtime clock. Either kinds - of timestamps are available in user space via - :c:func:`clock_gettime` using clock IDs ``CLOCK_MONOTONIC`` - and ``CLOCK_REALTIME``, respectively. - * .. _`V4L2-BUF-FLAG-TIMESTAMP-MONOTONIC`: - - - ``V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC`` - - 0x00002000 - - The buffer timestamp has been taken from the ``CLOCK_MONOTONIC`` - clock. To access the same clock outside V4L2, use - :c:func:`clock_gettime`. - * .. _`V4L2-BUF-FLAG-TIMESTAMP-COPY`: - - - ``V4L2_BUF_FLAG_TIMESTAMP_COPY`` - - 0x00004000 - - The CAPTURE buffer timestamp has been taken from the corresponding - OUTPUT buffer. This flag applies only to mem2mem devices. - * .. _`V4L2-BUF-FLAG-TSTAMP-SRC-MASK`: - - - ``V4L2_BUF_FLAG_TSTAMP_SRC_MASK`` - - 0x00070000 - - Mask for timestamp sources below. The timestamp source defines the - point of time the timestamp is taken in relation to the frame. - Logical 'and' operation between the ``flags`` field and - ``V4L2_BUF_FLAG_TSTAMP_SRC_MASK`` produces the value of the - timestamp source. Applications must set the timestamp source when - ``type`` refers to an output stream and - ``V4L2_BUF_FLAG_TIMESTAMP_COPY`` is set. - * .. _`V4L2-BUF-FLAG-TSTAMP-SRC-EOF`: - - - ``V4L2_BUF_FLAG_TSTAMP_SRC_EOF`` - - 0x00000000 - - End Of Frame. The buffer timestamp has been taken when the last - pixel of the frame has been received or the last pixel of the - frame has been transmitted. In practice, software generated - timestamps will typically be read from the clock a small amount of - time after the last pixel has been received or transmitten, - depending on the system and other activity in it. - * .. _`V4L2-BUF-FLAG-TSTAMP-SRC-SOE`: - - - ``V4L2_BUF_FLAG_TSTAMP_SRC_SOE`` - - 0x00010000 - - Start Of Exposure. The buffer timestamp has been taken when the - exposure of the frame has begun. This is only valid for the - ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` buffer type. - -.. raw:: latex - - \normalsize - - -.. c:type:: v4l2_memory - -enum v4l2_memory -================ - -.. tabularcolumns:: |p{5.0cm}|p{0.8cm}|p{11.7cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_MEMORY_MMAP`` - - 1 - - The buffer is used for :ref:`memory mapping <mmap>` I/O. - * - ``V4L2_MEMORY_USERPTR`` - - 2 - - The buffer is used for :ref:`user pointer <userp>` I/O. - * - ``V4L2_MEMORY_OVERLAY`` - - 3 - - [to do] - * - ``V4L2_MEMORY_DMABUF`` - - 4 - - The buffer is used for :ref:`DMA shared buffer <dmabuf>` I/O. - - - -Timecodes -========= - -The :c:type:`v4l2_buffer_timecode` structure is designed to hold a -:ref:`smpte12m` or similar timecode. -(struct :c:type:`timeval` timestamps are stored in the struct -:c:type:`v4l2_buffer` ``timestamp`` field.) - - -.. c:type:: v4l2_timecode - -struct v4l2_timecode --------------------- - -.. tabularcolumns:: |p{1.4cm}|p{2.8cm}|p{12.3cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Frame rate the timecodes are based on, see :ref:`timecode-type`. - * - __u32 - - ``flags`` - - Timecode flags, see :ref:`timecode-flags`. - * - __u8 - - ``frames`` - - Frame count, 0 ... 23/24/29/49/59, depending on the type of - timecode. - * - __u8 - - ``seconds`` - - Seconds count, 0 ... 59. This is a binary, not BCD number. - * - __u8 - - ``minutes`` - - Minutes count, 0 ... 59. This is a binary, not BCD number. - * - __u8 - - ``hours`` - - Hours count, 0 ... 29. This is a binary, not BCD number. - * - __u8 - - ``userbits``\ [4] - - The "user group" bits from the timecode. - - - -.. _timecode-type: - -Timecode Types --------------- - -.. tabularcolumns:: |p{5.6cm}|p{0.8cm}|p{11.1cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_TC_TYPE_24FPS`` - - 1 - - 24 frames per second, i. e. film. - * - ``V4L2_TC_TYPE_25FPS`` - - 2 - - 25 frames per second, i. e. PAL or SECAM video. - * - ``V4L2_TC_TYPE_30FPS`` - - 3 - - 30 frames per second, i. e. NTSC video. - * - ``V4L2_TC_TYPE_50FPS`` - - 4 - - - * - ``V4L2_TC_TYPE_60FPS`` - - 5 - - - - - -.. _timecode-flags: - -Timecode Flags --------------- - -.. tabularcolumns:: |p{6.6cm}|p{1.4cm}|p{9.5cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_TC_FLAG_DROPFRAME`` - - 0x0001 - - Indicates "drop frame" semantics for counting frames in 29.97 fps - material. When set, frame numbers 0 and 1 at the start of each - minute, except minutes 0, 10, 20, 30, 40, 50 are omitted from the - count. - * - ``V4L2_TC_FLAG_COLORFRAME`` - - 0x0002 - - The "color frame" flag. - * - ``V4L2_TC_USERBITS_field`` - - 0x000C - - Field mask for the "binary group flags". - * - ``V4L2_TC_USERBITS_USERDEFINED`` - - 0x0000 - - Unspecified format. - * - ``V4L2_TC_USERBITS_8BITCHARS`` - - 0x0008 - - 8-bit ISO characters. diff --git a/Documentation/media/uapi/v4l/capture-example.rst b/Documentation/media/uapi/v4l/capture-example.rst deleted file mode 100644 index 130ca47ef796..000000000000 --- a/Documentation/media/uapi/v4l/capture-example.rst +++ /dev/null @@ -1,20 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _capture-example: - -********************* -Video Capture Example -********************* - - -.. toctree:: - :maxdepth: 1 - - capture.c diff --git a/Documentation/media/uapi/v4l/capture.c.rst b/Documentation/media/uapi/v4l/capture.c.rst deleted file mode 100644 index b4652c2351f2..000000000000 --- a/Documentation/media/uapi/v4l/capture.c.rst +++ /dev/null @@ -1,671 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -file: media/v4l/capture.c -========================= - -.. code-block:: c - - /* - * V4L2 video capture example - * - * This program can be used and distributed without restrictions. - * - * This program is provided with the V4L2 API - * see https://linuxtv.org/docs.php for more information - */ - - #include <stdio.h> - #include <stdlib.h> - #include <string.h> - #include <assert.h> - - #include <getopt.h> /* getopt_long() */ - - #include <fcntl.h> /* low-level i/o */ - #include <unistd.h> - #include <errno.h> - #include <sys/stat.h> - #include <sys/types.h> - #include <sys/time.h> - #include <sys/mman.h> - #include <sys/ioctl.h> - - #include <linux/videodev2.h> - - #define CLEAR(x) memset(&(x), 0, sizeof(x)) - - enum io_method { - IO_METHOD_READ, - IO_METHOD_MMAP, - IO_METHOD_USERPTR, - }; - - struct buffer { - void *start; - size_t length; - }; - - static char *dev_name; - static enum io_method io = IO_METHOD_MMAP; - static int fd = -1; - struct buffer *buffers; - static unsigned int n_buffers; - static int out_buf; - static int force_format; - static int frame_count = 70; - - static void errno_exit(const char *s) - { - fprintf(stderr, "%s error %d, %s\\n", s, errno, strerror(errno)); - exit(EXIT_FAILURE); - } - - static int xioctl(int fh, int request, void *arg) - { - int r; - - do { - r = ioctl(fh, request, arg); - } while (-1 == r && EINTR == errno); - - return r; - } - - static void process_image(const void *p, int size) - { - if (out_buf) - fwrite(p, size, 1, stdout); - - fflush(stderr); - fprintf(stderr, "."); - fflush(stdout); - } - - static int read_frame(void) - { - struct v4l2_buffer buf; - unsigned int i; - - switch (io) { - case IO_METHOD_READ: - if (-1 == read(fd, buffers[0].start, buffers[0].length)) { - switch (errno) { - case EAGAIN: - return 0; - - case EIO: - /* Could ignore EIO, see spec. */ - - /* fall through */ - - default: - errno_exit("read"); - } - } - - process_image(buffers[0].start, buffers[0].length); - break; - - case IO_METHOD_MMAP: - CLEAR(buf); - - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; - - if (-1 == xioctl(fd, VIDIOC_DQBUF, &buf)) { - switch (errno) { - case EAGAIN: - return 0; - - case EIO: - /* Could ignore EIO, see spec. */ - - /* fall through */ - - default: - errno_exit("VIDIOC_DQBUF"); - } - } - - assert(buf.index < n_buffers); - - process_image(buffers[buf.index].start, buf.bytesused); - - if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) - errno_exit("VIDIOC_QBUF"); - break; - - case IO_METHOD_USERPTR: - CLEAR(buf); - - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_USERPTR; - - if (-1 == xioctl(fd, VIDIOC_DQBUF, &buf)) { - switch (errno) { - case EAGAIN: - return 0; - - case EIO: - /* Could ignore EIO, see spec. */ - - /* fall through */ - - default: - errno_exit("VIDIOC_DQBUF"); - } - } - - for (i = 0; i < n_buffers; ++i) - if (buf.m.userptr == (unsigned long)buffers[i].start - && buf.length == buffers[i].length) - break; - - assert(i < n_buffers); - - process_image((void *)buf.m.userptr, buf.bytesused); - - if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) - errno_exit("VIDIOC_QBUF"); - break; - } - - return 1; - } - - static void mainloop(void) - { - unsigned int count; - - count = frame_count; - - while (count-- > 0) { - for (;;) { - fd_set fds; - struct timeval tv; - int r; - - FD_ZERO(&fds); - FD_SET(fd, &fds); - - /* Timeout. */ - tv.tv_sec = 2; - tv.tv_usec = 0; - - r = select(fd + 1, &fds, NULL, NULL, &tv); - - if (-1 == r) { - if (EINTR == errno) - continue; - errno_exit("select"); - } - - if (0 == r) { - fprintf(stderr, "select timeout\\n"); - exit(EXIT_FAILURE); - } - - if (read_frame()) - break; - /* EAGAIN - continue select loop. */ - } - } - } - - static void stop_capturing(void) - { - enum v4l2_buf_type type; - - switch (io) { - case IO_METHOD_READ: - /* Nothing to do. */ - break; - - case IO_METHOD_MMAP: - case IO_METHOD_USERPTR: - type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (-1 == xioctl(fd, VIDIOC_STREAMOFF, &type)) - errno_exit("VIDIOC_STREAMOFF"); - break; - } - } - - static void start_capturing(void) - { - unsigned int i; - enum v4l2_buf_type type; - - switch (io) { - case IO_METHOD_READ: - /* Nothing to do. */ - break; - - case IO_METHOD_MMAP: - for (i = 0; i < n_buffers; ++i) { - struct v4l2_buffer buf; - - CLEAR(buf); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; - buf.index = i; - - if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) - errno_exit("VIDIOC_QBUF"); - } - type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (-1 == xioctl(fd, VIDIOC_STREAMON, &type)) - errno_exit("VIDIOC_STREAMON"); - break; - - case IO_METHOD_USERPTR: - for (i = 0; i < n_buffers; ++i) { - struct v4l2_buffer buf; - - CLEAR(buf); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_USERPTR; - buf.index = i; - buf.m.userptr = (unsigned long)buffers[i].start; - buf.length = buffers[i].length; - - if (-1 == xioctl(fd, VIDIOC_QBUF, &buf)) - errno_exit("VIDIOC_QBUF"); - } - type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (-1 == xioctl(fd, VIDIOC_STREAMON, &type)) - errno_exit("VIDIOC_STREAMON"); - break; - } - } - - static void uninit_device(void) - { - unsigned int i; - - switch (io) { - case IO_METHOD_READ: - free(buffers[0].start); - break; - - case IO_METHOD_MMAP: - for (i = 0; i < n_buffers; ++i) - if (-1 == munmap(buffers[i].start, buffers[i].length)) - errno_exit("munmap"); - break; - - case IO_METHOD_USERPTR: - for (i = 0; i < n_buffers; ++i) - free(buffers[i].start); - break; - } - - free(buffers); - } - - static void init_read(unsigned int buffer_size) - { - buffers = calloc(1, sizeof(*buffers)); - - if (!buffers) { - fprintf(stderr, "Out of memory\\n"); - exit(EXIT_FAILURE); - } - - buffers[0].length = buffer_size; - buffers[0].start = malloc(buffer_size); - - if (!buffers[0].start) { - fprintf(stderr, "Out of memory\\n"); - exit(EXIT_FAILURE); - } - } - - static void init_mmap(void) - { - struct v4l2_requestbuffers req; - - CLEAR(req); - - req.count = 4; - req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - req.memory = V4L2_MEMORY_MMAP; - - if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) { - if (EINVAL == errno) { - fprintf(stderr, "%s does not support " - "memory mappingn", dev_name); - exit(EXIT_FAILURE); - } else { - errno_exit("VIDIOC_REQBUFS"); - } - } - - if (req.count < 2) { - fprintf(stderr, "Insufficient buffer memory on %s\\n", - dev_name); - exit(EXIT_FAILURE); - } - - buffers = calloc(req.count, sizeof(*buffers)); - - if (!buffers) { - fprintf(stderr, "Out of memory\\n"); - exit(EXIT_FAILURE); - } - - for (n_buffers = 0; n_buffers < req.count; ++n_buffers) { - struct v4l2_buffer buf; - - CLEAR(buf); - - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; - buf.index = n_buffers; - - if (-1 == xioctl(fd, VIDIOC_QUERYBUF, &buf)) - errno_exit("VIDIOC_QUERYBUF"); - - buffers[n_buffers].length = buf.length; - buffers[n_buffers].start = - mmap(NULL /* start anywhere */, - buf.length, - PROT_READ | PROT_WRITE /* required */, - MAP_SHARED /* recommended */, - fd, buf.m.offset); - - if (MAP_FAILED == buffers[n_buffers].start) - errno_exit("mmap"); - } - } - - static void init_userp(unsigned int buffer_size) - { - struct v4l2_requestbuffers req; - - CLEAR(req); - - req.count = 4; - req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - req.memory = V4L2_MEMORY_USERPTR; - - if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) { - if (EINVAL == errno) { - fprintf(stderr, "%s does not support " - "user pointer i/on", dev_name); - exit(EXIT_FAILURE); - } else { - errno_exit("VIDIOC_REQBUFS"); - } - } - - buffers = calloc(4, sizeof(*buffers)); - - if (!buffers) { - fprintf(stderr, "Out of memory\\n"); - exit(EXIT_FAILURE); - } - - for (n_buffers = 0; n_buffers < 4; ++n_buffers) { - buffers[n_buffers].length = buffer_size; - buffers[n_buffers].start = malloc(buffer_size); - - if (!buffers[n_buffers].start) { - fprintf(stderr, "Out of memory\\n"); - exit(EXIT_FAILURE); - } - } - } - - static void init_device(void) - { - struct v4l2_capability cap; - struct v4l2_cropcap cropcap; - struct v4l2_crop crop; - struct v4l2_format fmt; - unsigned int min; - - if (-1 == xioctl(fd, VIDIOC_QUERYCAP, &cap)) { - if (EINVAL == errno) { - fprintf(stderr, "%s is no V4L2 device\\n", - dev_name); - exit(EXIT_FAILURE); - } else { - errno_exit("VIDIOC_QUERYCAP"); - } - } - - if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) { - fprintf(stderr, "%s is no video capture device\\n", - dev_name); - exit(EXIT_FAILURE); - } - - switch (io) { - case IO_METHOD_READ: - if (!(cap.capabilities & V4L2_CAP_READWRITE)) { - fprintf(stderr, "%s does not support read i/o\\n", - dev_name); - exit(EXIT_FAILURE); - } - break; - - case IO_METHOD_MMAP: - case IO_METHOD_USERPTR: - if (!(cap.capabilities & V4L2_CAP_STREAMING)) { - fprintf(stderr, "%s does not support streaming i/o\\n", - dev_name); - exit(EXIT_FAILURE); - } - break; - } - - - /* Select video input, video standard and tune here. */ - - - CLEAR(cropcap); - - cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (0 == xioctl(fd, VIDIOC_CROPCAP, &cropcap)) { - crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - crop.c = cropcap.defrect; /* reset to default */ - - if (-1 == xioctl(fd, VIDIOC_S_CROP, &crop)) { - switch (errno) { - case EINVAL: - /* Cropping not supported. */ - break; - default: - /* Errors ignored. */ - break; - } - } - } else { - /* Errors ignored. */ - } - - - CLEAR(fmt); - - fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - if (force_format) { - fmt.fmt.pix.width = 640; - fmt.fmt.pix.height = 480; - fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; - fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; - - if (-1 == xioctl(fd, VIDIOC_S_FMT, &fmt)) - errno_exit("VIDIOC_S_FMT"); - - /* Note VIDIOC_S_FMT may change width and height. */ - } else { - /* Preserve original settings as set by v4l2-ctl for example */ - if (-1 == xioctl(fd, VIDIOC_G_FMT, &fmt)) - errno_exit("VIDIOC_G_FMT"); - } - - /* Buggy driver paranoia. */ - min = fmt.fmt.pix.width * 2; - if (fmt.fmt.pix.bytesperline < min) - fmt.fmt.pix.bytesperline = min; - min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height; - if (fmt.fmt.pix.sizeimage < min) - fmt.fmt.pix.sizeimage = min; - - switch (io) { - case IO_METHOD_READ: - init_read(fmt.fmt.pix.sizeimage); - break; - - case IO_METHOD_MMAP: - init_mmap(); - break; - - case IO_METHOD_USERPTR: - init_userp(fmt.fmt.pix.sizeimage); - break; - } - } - - static void close_device(void) - { - if (-1 == close(fd)) - errno_exit("close"); - - fd = -1; - } - - static void open_device(void) - { - struct stat st; - - if (-1 == stat(dev_name, &st)) { - fprintf(stderr, "Cannot identify '%s': %d, %s\\n", - dev_name, errno, strerror(errno)); - exit(EXIT_FAILURE); - } - - if (!S_ISCHR(st.st_mode)) { - fprintf(stderr, "%s is no devicen", dev_name); - exit(EXIT_FAILURE); - } - - fd = open(dev_name, O_RDWR /* required */ | O_NONBLOCK, 0); - - if (-1 == fd) { - fprintf(stderr, "Cannot open '%s': %d, %s\\n", - dev_name, errno, strerror(errno)); - exit(EXIT_FAILURE); - } - } - - static void usage(FILE *fp, int argc, char **argv) - { - fprintf(fp, - "Usage: %s [options]\\n\\n" - "Version 1.3\\n" - "Options:\\n" - "-d | --device name Video device name [%s]n" - "-h | --help Print this messagen" - "-m | --mmap Use memory mapped buffers [default]n" - "-r | --read Use read() callsn" - "-u | --userp Use application allocated buffersn" - "-o | --output Outputs stream to stdoutn" - "-f | --format Force format to 640x480 YUYVn" - "-c | --count Number of frames to grab [%i]n" - "", - argv[0], dev_name, frame_count); - } - - static const char short_options[] = "d:hmruofc:"; - - static const struct option - long_options[] = { - { "device", required_argument, NULL, 'd' }, - { "help", no_argument, NULL, 'h' }, - { "mmap", no_argument, NULL, 'm' }, - { "read", no_argument, NULL, 'r' }, - { "userp", no_argument, NULL, 'u' }, - { "output", no_argument, NULL, 'o' }, - { "format", no_argument, NULL, 'f' }, - { "count", required_argument, NULL, 'c' }, - { 0, 0, 0, 0 } - }; - - int main(int argc, char **argv) - { - dev_name = "/dev/video0"; - - for (;;) { - int idx; - int c; - - c = getopt_long(argc, argv, - short_options, long_options, &idx); - - if (-1 == c) - break; - - switch (c) { - case 0: /* getopt_long() flag */ - break; - - case 'd': - dev_name = optarg; - break; - - case 'h': - usage(stdout, argc, argv); - exit(EXIT_SUCCESS); - - case 'm': - io = IO_METHOD_MMAP; - break; - - case 'r': - io = IO_METHOD_READ; - break; - - case 'u': - io = IO_METHOD_USERPTR; - break; - - case 'o': - out_buf++; - break; - - case 'f': - force_format++; - break; - - case 'c': - errno = 0; - frame_count = strtol(optarg, NULL, 0); - if (errno) - errno_exit(optarg); - break; - - default: - usage(stderr, argc, argv); - exit(EXIT_FAILURE); - } - } - - open_device(); - init_device(); - start_capturing(); - mainloop(); - stop_capturing(); - uninit_device(); - close_device(); - fprintf(stderr, "\\n"); - return 0; - } diff --git a/Documentation/media/uapi/v4l/colorspaces-defs.rst b/Documentation/media/uapi/v4l/colorspaces-defs.rst deleted file mode 100644 index e122bbe3d799..000000000000 --- a/Documentation/media/uapi/v4l/colorspaces-defs.rst +++ /dev/null @@ -1,183 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -**************************** -Defining Colorspaces in V4L2 -**************************** - -In V4L2 colorspaces are defined by four values. The first is the -colorspace identifier (enum :c:type:`v4l2_colorspace`) -which defines the chromaticities, the default transfer function, the -default Y'CbCr encoding and the default quantization method. The second -is the transfer function identifier (enum -:c:type:`v4l2_xfer_func`) to specify non-standard -transfer functions. The third is the Y'CbCr encoding identifier (enum -:c:type:`v4l2_ycbcr_encoding`) to specify -non-standard Y'CbCr encodings and the fourth is the quantization -identifier (enum :c:type:`v4l2_quantization`) to -specify non-standard quantization methods. Most of the time only the -colorspace field of struct :c:type:`v4l2_pix_format` -or struct :c:type:`v4l2_pix_format_mplane` -needs to be filled in. - -.. _hsv-colorspace: - -On :ref:`HSV formats <hsv-formats>` the *Hue* is defined as the angle on -the cylindrical color representation. Usually this angle is measured in -degrees, i.e. 0-360. When we map this angle value into 8 bits, there are -two basic ways to do it: Divide the angular value by 2 (0-179), or use the -whole range, 0-255, dividing the angular value by 1.41. The enum -:c:type:`v4l2_hsv_encoding` specifies which encoding is used. - -.. note:: The default R'G'B' quantization is full range for all - colorspaces except for BT.2020 which uses limited range R'G'B' - quantization. - -.. tabularcolumns:: |p{6.7cm}|p{10.8cm}| - -.. c:type:: v4l2_colorspace - -.. flat-table:: V4L2 Colorspaces - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Details - * - ``V4L2_COLORSPACE_DEFAULT`` - - The default colorspace. This can be used by applications to let - the driver fill in the colorspace. - * - ``V4L2_COLORSPACE_SMPTE170M`` - - See :ref:`col-smpte-170m`. - * - ``V4L2_COLORSPACE_REC709`` - - See :ref:`col-rec709`. - * - ``V4L2_COLORSPACE_SRGB`` - - See :ref:`col-srgb`. - * - ``V4L2_COLORSPACE_OPRGB`` - - See :ref:`col-oprgb`. - * - ``V4L2_COLORSPACE_BT2020`` - - See :ref:`col-bt2020`. - * - ``V4L2_COLORSPACE_DCI_P3`` - - See :ref:`col-dcip3`. - * - ``V4L2_COLORSPACE_SMPTE240M`` - - See :ref:`col-smpte-240m`. - * - ``V4L2_COLORSPACE_470_SYSTEM_M`` - - See :ref:`col-sysm`. - * - ``V4L2_COLORSPACE_470_SYSTEM_BG`` - - See :ref:`col-sysbg`. - * - ``V4L2_COLORSPACE_JPEG`` - - See :ref:`col-jpeg`. - * - ``V4L2_COLORSPACE_RAW`` - - The raw colorspace. This is used for raw image capture where the - image is minimally processed and is using the internal colorspace - of the device. The software that processes an image using this - 'colorspace' will have to know the internals of the capture - device. - - - -.. c:type:: v4l2_xfer_func - -.. tabularcolumns:: |p{5.5cm}|p{12.0cm}| - -.. flat-table:: V4L2 Transfer Function - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Details - * - ``V4L2_XFER_FUNC_DEFAULT`` - - Use the default transfer function as defined by the colorspace. - * - ``V4L2_XFER_FUNC_709`` - - Use the Rec. 709 transfer function. - * - ``V4L2_XFER_FUNC_SRGB`` - - Use the sRGB transfer function. - * - ``V4L2_XFER_FUNC_OPRGB`` - - Use the opRGB transfer function. - * - ``V4L2_XFER_FUNC_SMPTE240M`` - - Use the SMPTE 240M transfer function. - * - ``V4L2_XFER_FUNC_NONE`` - - Do not use a transfer function (i.e. use linear RGB values). - * - ``V4L2_XFER_FUNC_DCI_P3`` - - Use the DCI-P3 transfer function. - * - ``V4L2_XFER_FUNC_SMPTE2084`` - - Use the SMPTE 2084 transfer function. See :ref:`xf-smpte-2084`. - - - -.. c:type:: v4l2_ycbcr_encoding - -.. tabularcolumns:: |p{7.2cm}|p{10.3cm}| - -.. flat-table:: V4L2 Y'CbCr Encodings - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Details - * - ``V4L2_YCBCR_ENC_DEFAULT`` - - Use the default Y'CbCr encoding as defined by the colorspace. - * - ``V4L2_YCBCR_ENC_601`` - - Use the BT.601 Y'CbCr encoding. - * - ``V4L2_YCBCR_ENC_709`` - - Use the Rec. 709 Y'CbCr encoding. - * - ``V4L2_YCBCR_ENC_XV601`` - - Use the extended gamut xvYCC BT.601 encoding. - * - ``V4L2_YCBCR_ENC_XV709`` - - Use the extended gamut xvYCC Rec. 709 encoding. - * - ``V4L2_YCBCR_ENC_BT2020`` - - Use the default non-constant luminance BT.2020 Y'CbCr encoding. - * - ``V4L2_YCBCR_ENC_BT2020_CONST_LUM`` - - Use the constant luminance BT.2020 Yc'CbcCrc encoding. - * - ``V4L2_YCBCR_ENC_SMPTE_240M`` - - Use the SMPTE 240M Y'CbCr encoding. - - - -.. c:type:: v4l2_hsv_encoding - -.. tabularcolumns:: |p{6.5cm}|p{11.0cm}| - -.. flat-table:: V4L2 HSV Encodings - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Details - * - ``V4L2_HSV_ENC_180`` - - For the Hue, each LSB is two degrees. - * - ``V4L2_HSV_ENC_256`` - - For the Hue, the 360 degrees are mapped into 8 bits, i.e. each - LSB is roughly 1.41 degrees. - - - -.. c:type:: v4l2_quantization - -.. tabularcolumns:: |p{6.5cm}|p{11.0cm}| - -.. flat-table:: V4L2 Quantization Methods - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Details - * - ``V4L2_QUANTIZATION_DEFAULT`` - - Use the default quantization encoding as defined by the - colorspace. This is always full range for R'G'B' (except for the - BT.2020 colorspace) and HSV. It is usually limited range for Y'CbCr. - * - ``V4L2_QUANTIZATION_FULL_RANGE`` - - Use the full range quantization encoding. I.e. the range [0…1] is - mapped to [0…255] (with possible clipping to [1…254] to avoid the - 0x00 and 0xff values). Cb and Cr are mapped from [-0.5…0.5] to - [0…255] (with possible clipping to [1…254] to avoid the 0x00 and - 0xff values). - * - ``V4L2_QUANTIZATION_LIM_RANGE`` - - Use the limited range quantization encoding. I.e. the range [0…1] - is mapped to [16…235]. Cb and Cr are mapped from [-0.5…0.5] to - [16…240]. diff --git a/Documentation/media/uapi/v4l/colorspaces-details.rst b/Documentation/media/uapi/v4l/colorspaces-details.rst deleted file mode 100644 index 8b0ba3668101..000000000000 --- a/Documentation/media/uapi/v4l/colorspaces-details.rst +++ /dev/null @@ -1,813 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -******************************** -Detailed Colorspace Descriptions -******************************** - - -.. _col-smpte-170m: - -Colorspace SMPTE 170M (V4L2_COLORSPACE_SMPTE170M) -================================================= - -The :ref:`smpte170m` standard defines the colorspace used by NTSC and -PAL and by SDTV in general. The default transfer function is -``V4L2_XFER_FUNC_709``. The default Y'CbCr encoding is -``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited -range. The chromaticities of the primary colors and the white reference -are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: SMPTE 170M Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.630 - - 0.340 - * - Green - - 0.310 - - 0.595 - * - Blue - - 0.155 - - 0.070 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - -The red, green and blue chromaticities are also often referred to as the -SMPTE C set, so this colorspace is sometimes called SMPTE C as well. - -The transfer function defined for SMPTE 170M is the same as the one -defined in Rec. 709. - -.. math:: - - L' = -1.099(-L)^{0.45} + 0.099 \text{, for } L \le-0.018 - - L' = 4.5L \text{, for } -0.018 < L < 0.018 - - L' = 1.099L^{0.45} - 0.099 \text{, for } L \ge 0.018 - -Inverse Transfer function: - -.. math:: - - L = -\left( \frac{L' - 0.099}{-1.099} \right) ^{\frac{1}{0.45}} \text{, for } L' \le -0.081 - - L = \frac{L'}{4.5} \text{, for } -0.081 < L' < 0.081 - - L = \left(\frac{L' + 0.099}{1.099}\right)^{\frac{1}{0.45} } \text{, for } L' \ge 0.081 - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_601`` encoding: - -.. math:: - - Y' = 0.2990R' + 0.5870G' + 0.1140B' - - Cb = -0.1687R' - 0.3313G' + 0.5B' - - Cr = 0.5R' - 0.4187G' - 0.0813B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. This conversion to Y'CbCr is identical to the one defined in -the :ref:`itu601` standard and this colorspace is sometimes called -BT.601 as well, even though BT.601 does not mention any color primaries. - -The default quantization is limited range, but full range is possible -although rarely seen. - - -.. _col-rec709: - -Colorspace Rec. 709 (V4L2_COLORSPACE_REC709) -============================================ - -The :ref:`itu709` standard defines the colorspace used by HDTV in -general. The default transfer function is ``V4L2_XFER_FUNC_709``. The -default Y'CbCr encoding is ``V4L2_YCBCR_ENC_709``. The default Y'CbCr -quantization is limited range. The chromaticities of the primary colors -and the white reference are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: Rec. 709 Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.640 - - 0.330 - * - Green - - 0.300 - - 0.600 - * - Blue - - 0.150 - - 0.060 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - -The full name of this standard is Rec. ITU-R BT.709-5. - -Transfer function. Normally L is in the range [0…1], but for the -extended gamut xvYCC encoding values outside that range are allowed. - -.. math:: - - L' = -1.099(-L)^{0.45} + 0.099 \text{, for } L \le -0.018 - - L' = 4.5L \text{, for } -0.018 < L < 0.018 - - L' = 1.099L^{0.45} - 0.099 \text{, for } L \ge 0.018 - -Inverse Transfer function: - -.. math:: - - L = -\left( \frac{L' - 0.099}{-1.099} \right)^\frac{1}{0.45} \text{, for } L' \le -0.081 - - L = \frac{L'}{4.5}\text{, for } -0.081 < L' < 0.081 - - L = \left(\frac{L' + 0.099}{1.099}\right)^{\frac{1}{0.45} } \text{, for } L' \ge 0.081 - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_709`` encoding: - -.. math:: - - Y' = 0.2126R' + 0.7152G' + 0.0722B' - - Cb = -0.1146R' - 0.3854G' + 0.5B' - - Cr = 0.5R' - 0.4542G' - 0.0458B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. - -The default quantization is limited range, but full range is possible -although rarely seen. - -The ``V4L2_YCBCR_ENC_709`` encoding described above is the default for -this colorspace, but it can be overridden with ``V4L2_YCBCR_ENC_601``, -in which case the BT.601 Y'CbCr encoding is used. - -Two additional extended gamut Y'CbCr encodings are also possible with -this colorspace: - -The xvYCC 709 encoding (``V4L2_YCBCR_ENC_XV709``, :ref:`xvycc`) is -similar to the Rec. 709 encoding, but it allows for R', G' and B' values -that are outside the range [0…1]. The resulting Y', Cb and Cr values are -scaled and offset according to the limited range formula: - -.. math:: - - Y' = \frac{219}{256} * (0.2126R' + 0.7152G' + 0.0722B') + \frac{16}{256} - - Cb = \frac{224}{256} * (-0.1146R' - 0.3854G' + 0.5B') - - Cr = \frac{224}{256} * (0.5R' - 0.4542G' - 0.0458B') - -The xvYCC 601 encoding (``V4L2_YCBCR_ENC_XV601``, :ref:`xvycc`) is -similar to the BT.601 encoding, but it allows for R', G' and B' values -that are outside the range [0…1]. The resulting Y', Cb and Cr values are -scaled and offset according to the limited range formula: - -.. math:: - - Y' = \frac{219}{256} * (0.2990R' + 0.5870G' + 0.1140B') + \frac{16}{256} - - Cb = \frac{224}{256} * (-0.1687R' - 0.3313G' + 0.5B') - - Cr = \frac{224}{256} * (0.5R' - 0.4187G' - 0.0813B') - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5] and quantized without further scaling or offsets. -The non-standard xvYCC 709 or xvYCC 601 encodings can be -used by selecting ``V4L2_YCBCR_ENC_XV709`` or ``V4L2_YCBCR_ENC_XV601``. -As seen by the xvYCC formulas these encodings always use limited range quantization, -there is no full range variant. The whole point of these extended gamut encodings -is that values outside the limited range are still valid, although they -map to R', G' and B' values outside the [0…1] range and are therefore outside -the Rec. 709 colorspace gamut. - - -.. _col-srgb: - -Colorspace sRGB (V4L2_COLORSPACE_SRGB) -====================================== - -The :ref:`srgb` standard defines the colorspace used by most webcams -and computer graphics. The default transfer function is -``V4L2_XFER_FUNC_SRGB``. The default Y'CbCr encoding is -``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited range. - -Note that the :ref:`sycc` standard specifies full range quantization, -however all current capture hardware supported by the kernel convert -R'G'B' to limited range Y'CbCr. So choosing full range as the default -would break how applications interpret the quantization range. - -The chromaticities of the primary colors and the white reference are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: sRGB Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.640 - - 0.330 - * - Green - - 0.300 - - 0.600 - * - Blue - - 0.150 - - 0.060 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - -These chromaticities are identical to the Rec. 709 colorspace. - -Transfer function. Note that negative values for L are only used by the -Y'CbCr conversion. - -.. math:: - - L' = -1.055(-L)^{\frac{1}{2.4} } + 0.055\text{, for }L < -0.0031308 - - L' = 12.92L\text{, for }-0.0031308 \le L \le 0.0031308 - - L' = 1.055L ^{\frac{1}{2.4} } - 0.055\text{, for }0.0031308 < L \le 1 - -Inverse Transfer function: - -.. math:: - - L = -((-L' + 0.055) / 1.055) ^{2.4}\text{, for }L' < -0.04045 - - L = L' / 12.92\text{, for }-0.04045 \le L' \le 0.04045 - - L = ((L' + 0.055) / 1.055) ^{2.4}\text{, for }L' > 0.04045 - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_601`` encoding as defined by :ref:`sycc`: - -.. math:: - - Y' = 0.2990R' + 0.5870G' + 0.1140B' - - Cb = -0.1687R' - 0.3313G' + 0.5B' - - Cr = 0.5R' - 0.4187G' - 0.0813B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. This transform is identical to one defined in SMPTE -170M/BT.601. The Y'CbCr quantization is limited range. - - -.. _col-oprgb: - -Colorspace opRGB (V4L2_COLORSPACE_OPRGB) -=============================================== - -The :ref:`oprgb` standard defines the colorspace used by computer -graphics that use the opRGB colorspace. The default transfer function is -``V4L2_XFER_FUNC_OPRGB``. The default Y'CbCr encoding is -``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited -range. - -Note that the :ref:`oprgb` standard specifies full range quantization, -however all current capture hardware supported by the kernel convert -R'G'B' to limited range Y'CbCr. So choosing full range as the default -would break how applications interpret the quantization range. - -The chromaticities of the primary colors and the white reference are: - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: opRGB Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.6400 - - 0.3300 - * - Green - - 0.2100 - - 0.7100 - * - Blue - - 0.1500 - - 0.0600 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - - -Transfer function: - -.. math:: - - L' = L ^{\frac{1}{2.19921875}} - -Inverse Transfer function: - -.. math:: - - L = L'^{(2.19921875)} - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_601`` encoding: - -.. math:: - - Y' = 0.2990R' + 0.5870G' + 0.1140B' - - Cb = -0.1687R' - 0.3313G' + 0.5B' - - Cr = 0.5R' - 0.4187G' - 0.0813B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. This transform is identical to one defined in SMPTE -170M/BT.601. The Y'CbCr quantization is limited range. - - -.. _col-bt2020: - -Colorspace BT.2020 (V4L2_COLORSPACE_BT2020) -=========================================== - -The :ref:`itu2020` standard defines the colorspace used by Ultra-high -definition television (UHDTV). The default transfer function is -``V4L2_XFER_FUNC_709``. The default Y'CbCr encoding is -``V4L2_YCBCR_ENC_BT2020``. The default R'G'B' quantization is limited -range (!), and so is the default Y'CbCr quantization. The chromaticities -of the primary colors and the white reference are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: BT.2020 Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.708 - - 0.292 - * - Green - - 0.170 - - 0.797 - * - Blue - - 0.131 - - 0.046 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - - -Transfer function (same as Rec. 709): - -.. math:: - - L' = 4.5L\text{, for }0 \le L < 0.018 - - L' = 1.099L ^{0.45} - 0.099\text{, for } 0.018 \le L \le 1 - -Inverse Transfer function: - -.. math:: - - L = L' / 4.5\text{, for } L' < 0.081 - - L = \left( \frac{L' + 0.099}{1.099}\right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.081 - -Please note that while Rec. 709 is defined as the default transfer function -by the :ref:`itu2020` standard, in practice this colorspace is often used -with the :ref:`xf-smpte-2084`. In particular Ultra HD Blu-ray discs use -this combination. - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_BT2020`` encoding: - -.. math:: - - Y' = 0.2627R' + 0.6780G' + 0.0593B' - - Cb = -0.1396R' - 0.3604G' + 0.5B' - - Cr = 0.5R' - 0.4598G' - 0.0402B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. The Y'CbCr quantization is limited range. - -There is also an alternate constant luminance R'G'B' to Yc'CbcCrc -(``V4L2_YCBCR_ENC_BT2020_CONST_LUM``) encoding: - -Luma: - -.. math:: - :nowrap: - - \begin{align*} - Yc' = (0.2627R + 0.6780G + 0.0593B)'& \\ - B' - Yc' \le 0:& \\ - &Cbc = (B' - Yc') / 1.9404 \\ - B' - Yc' > 0: & \\ - &Cbc = (B' - Yc') / 1.5816 \\ - R' - Yc' \le 0:& \\ - &Crc = (R' - Y') / 1.7184 \\ - R' - Yc' > 0:& \\ - &Crc = (R' - Y') / 0.9936 - \end{align*} - -Yc' is clamped to the range [0…1] and Cbc and Crc are clamped to the -range [-0.5…0.5]. The Yc'CbcCrc quantization is limited range. - - -.. _col-dcip3: - -Colorspace DCI-P3 (V4L2_COLORSPACE_DCI_P3) -========================================== - -The :ref:`smpte431` standard defines the colorspace used by cinema -projectors that use the DCI-P3 colorspace. The default transfer function -is ``V4L2_XFER_FUNC_DCI_P3``. The default Y'CbCr encoding is -``V4L2_YCBCR_ENC_709``. The default Y'CbCr quantization is limited range. - -.. note:: - - Note that this colorspace standard does not specify a - Y'CbCr encoding since it is not meant to be encoded to Y'CbCr. So this - default Y'CbCr encoding was picked because it is the HDTV encoding. - -The chromaticities of the primary colors and the white reference are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: DCI-P3 Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.6800 - - 0.3200 - * - Green - - 0.2650 - - 0.6900 - * - Blue - - 0.1500 - - 0.0600 - * - White Reference - - 0.3140 - - 0.3510 - - - -Transfer function: - -.. math:: - - L' = L^{\frac{1}{2.6}} - -Inverse Transfer function: - -.. math:: - - L = L'^{(2.6)} - -Y'CbCr encoding is not specified. V4L2 defaults to Rec. 709. - - -.. _col-smpte-240m: - -Colorspace SMPTE 240M (V4L2_COLORSPACE_SMPTE240M) -================================================= - -The :ref:`smpte240m` standard was an interim standard used during the -early days of HDTV (1988-1998). It has been superseded by Rec. 709. The -default transfer function is ``V4L2_XFER_FUNC_SMPTE240M``. The default -Y'CbCr encoding is ``V4L2_YCBCR_ENC_SMPTE240M``. The default Y'CbCr -quantization is limited range. The chromaticities of the primary colors -and the white reference are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: SMPTE 240M Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.630 - - 0.340 - * - Green - - 0.310 - - 0.595 - * - Blue - - 0.155 - - 0.070 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - -These chromaticities are identical to the SMPTE 170M colorspace. - -Transfer function: - -.. math:: - - L' = 4L\text{, for } 0 \le L < 0.0228 - - L' = 1.1115L ^{0.45} - 0.1115\text{, for } 0.0228 \le L \le 1 - -Inverse Transfer function: - -.. math:: - - L = \frac{L'}{4}\text{, for } 0 \le L' < 0.0913 - - L = \left( \frac{L' + 0.1115}{1.1115}\right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.0913 - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_SMPTE240M`` encoding: - -.. math:: - - Y' = 0.2122R' + 0.7013G' + 0.0865B' - - Cb = -0.1161R' - 0.3839G' + 0.5B' - - Cr = 0.5R' - 0.4451G' - 0.0549B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the -range [-0.5…0.5]. The Y'CbCr quantization is limited range. - - -.. _col-sysm: - -Colorspace NTSC 1953 (V4L2_COLORSPACE_470_SYSTEM_M) -=================================================== - -This standard defines the colorspace used by NTSC in 1953. In practice -this colorspace is obsolete and SMPTE 170M should be used instead. The -default transfer function is ``V4L2_XFER_FUNC_709``. The default Y'CbCr -encoding is ``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is -limited range. The chromaticities of the primary colors and the white -reference are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: NTSC 1953 Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.67 - - 0.33 - * - Green - - 0.21 - - 0.71 - * - Blue - - 0.14 - - 0.08 - * - White Reference (C) - - 0.310 - - 0.316 - - -.. note:: - - This colorspace uses Illuminant C instead of D65 as the white - reference. To correctly convert an image in this colorspace to another - that uses D65 you need to apply a chromatic adaptation algorithm such as - the Bradford method. - -The transfer function was never properly defined for NTSC 1953. The Rec. -709 transfer function is recommended in the literature: - -.. math:: - - L' = 4.5L\text{, for } 0 \le L < 0.018 - - L' = 1.099L ^{0.45} - 0.099\text{, for } 0.018 \le L \le 1 - -Inverse Transfer function: - -.. math:: - - L = \frac{L'}{4.5} \text{, for } L' < 0.081 - - L = \left( \frac{L' + 0.099}{1.099}\right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.081 - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_601`` encoding: - -.. math:: - - Y' = 0.2990R' + 0.5870G' + 0.1140B' - - Cb = -0.1687R' - 0.3313G' + 0.5B' - - Cr = 0.5R' - 0.4187G' - 0.0813B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is -identical to one defined in SMPTE 170M/BT.601. - - -.. _col-sysbg: - -Colorspace EBU Tech. 3213 (V4L2_COLORSPACE_470_SYSTEM_BG) -========================================================= - -The :ref:`tech3213` standard defines the colorspace used by PAL/SECAM -in 1975. In practice this colorspace is obsolete and SMPTE 170M should -be used instead. The default transfer function is -``V4L2_XFER_FUNC_709``. The default Y'CbCr encoding is -``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited -range. The chromaticities of the primary colors and the white reference -are: - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: EBU Tech. 3213 Chromaticities - :header-rows: 1 - :stub-columns: 0 - :widths: 1 1 2 - - * - Color - - x - - y - * - Red - - 0.64 - - 0.33 - * - Green - - 0.29 - - 0.60 - * - Blue - - 0.15 - - 0.06 - * - White Reference (D65) - - 0.3127 - - 0.3290 - - - -The transfer function was never properly defined for this colorspace. -The Rec. 709 transfer function is recommended in the literature: - -.. math:: - - L' = 4.5L\text{, for } 0 \le L < 0.018 - - L' = 1.099L ^{0.45} - 0.099\text{, for } 0.018 \le L \le 1 - -Inverse Transfer function: - -.. math:: - - L = \frac{L'}{4.5} \text{, for } L' < 0.081 - - L = \left(\frac{L' + 0.099}{1.099} \right) ^{\frac{1}{0.45} }\text{, for } L' \ge 0.081 - -The luminance (Y') and color difference (Cb and Cr) are obtained with -the following ``V4L2_YCBCR_ENC_601`` encoding: - -.. math:: - - Y' = 0.2990R' + 0.5870G' + 0.1140B' - - Cb = -0.1687R' - 0.3313G' + 0.5B' - - Cr = 0.5R' - 0.4187G' - 0.0813B' - -Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range -[-0.5…0.5]. The Y'CbCr quantization is limited range. This transform is -identical to one defined in SMPTE 170M/BT.601. - - -.. _col-jpeg: - -Colorspace JPEG (V4L2_COLORSPACE_JPEG) -====================================== - -This colorspace defines the colorspace used by most (Motion-)JPEG -formats. The chromaticities of the primary colors and the white -reference are identical to sRGB. The transfer function use is -``V4L2_XFER_FUNC_SRGB``. The Y'CbCr encoding is ``V4L2_YCBCR_ENC_601`` -with full range quantization where Y' is scaled to [0…255] and Cb/Cr are -scaled to [-128…128] and then clipped to [-128…127]. - -.. note:: - - The JPEG standard does not actually store colorspace - information. So if something other than sRGB is used, then the driver - will have to set that information explicitly. Effectively - ``V4L2_COLORSPACE_JPEG`` can be considered to be an abbreviation for - ``V4L2_COLORSPACE_SRGB``, ``V4L2_YCBCR_ENC_601`` and - ``V4L2_QUANTIZATION_FULL_RANGE``. - -*************************************** -Detailed Transfer Function Descriptions -*************************************** - -.. _xf-smpte-2084: - -Transfer Function SMPTE 2084 (V4L2_XFER_FUNC_SMPTE2084) -======================================================= - -The :ref:`smpte2084` standard defines the transfer function used by -High Dynamic Range content. - -Constants: - m1 = (2610 / 4096) / 4 - - m2 = (2523 / 4096) * 128 - - c1 = 3424 / 4096 - - c2 = (2413 / 4096) * 32 - - c3 = (2392 / 4096) * 32 - -Transfer function: - L' = ((c1 + c2 * L\ :sup:`m1`) / (1 + c3 * L\ :sup:`m1`))\ :sup:`m2` - -Inverse Transfer function: - L = (max(L':sup:`1/m2` - c1, 0) / (c2 - c3 * - L'\ :sup:`1/m2`))\ :sup:`1/m1` - -Take care when converting between this transfer function and non-HDR transfer -functions: the linear RGB values [0…1] of HDR content map to a luminance range -of 0 to 10000 cd/m\ :sup:`2` whereas the linear RGB values of non-HDR (aka -Standard Dynamic Range or SDR) map to a luminance range of 0 to 100 cd/m\ :sup:`2`. - -To go from SDR to HDR you will have to divide L by 100 first. To go in the other -direction you will have to multiply L by 100. Of course, this clamps all -luminance values over 100 cd/m\ :sup:`2` to 100 cd/m\ :sup:`2`. - -There are better methods, see e.g. :ref:`colimg` for more in-depth information -about this. diff --git a/Documentation/media/uapi/v4l/colorspaces.rst b/Documentation/media/uapi/v4l/colorspaces.rst deleted file mode 100644 index 4f6c82fa057f..000000000000 --- a/Documentation/media/uapi/v4l/colorspaces.rst +++ /dev/null @@ -1,170 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _colorspaces: - -*********** -Colorspaces -*********** - -'Color' is a very complex concept and depends on physics, chemistry and -biology. Just because you have three numbers that describe the 'red', -'green' and 'blue' components of the color of a pixel does not mean that -you can accurately display that color. A colorspace defines what it -actually *means* to have an RGB value of e.g. (255, 0, 0). That is, -which color should be reproduced on the screen in a perfectly calibrated -environment. - -In order to do that we first need to have a good definition of color, -i.e. some way to uniquely and unambiguously define a color so that -someone else can reproduce it. Human color vision is trichromatic since -the human eye has color receptors that are sensitive to three different -wavelengths of light. Hence the need to use three numbers to describe -color. Be glad you are not a mantis shrimp as those are sensitive to 12 -different wavelengths, so instead of RGB we would be using the -ABCDEFGHIJKL colorspace... - -Color exists only in the eye and brain and is the result of how strongly -color receptors are stimulated. This is based on the Spectral Power -Distribution (SPD) which is a graph showing the intensity (radiant -power) of the light at wavelengths covering the visible spectrum as it -enters the eye. The science of colorimetry is about the relationship -between the SPD and color as perceived by the human brain. - -Since the human eye has only three color receptors it is perfectly -possible that different SPDs will result in the same stimulation of -those receptors and are perceived as the same color, even though the SPD -of the light is different. - -In the 1920s experiments were devised to determine the relationship -between SPDs and the perceived color and that resulted in the CIE 1931 -standard that defines spectral weighting functions that model the -perception of color. Specifically that standard defines functions that -can take an SPD and calculate the stimulus for each color receptor. -After some further mathematical transforms these stimuli are known as -the *CIE XYZ tristimulus* values and these X, Y and Z values describe a -color as perceived by a human unambiguously. These X, Y and Z values are -all in the range [0…1]. - -The Y value in the CIE XYZ colorspace corresponds to luminance. Often -the CIE XYZ colorspace is transformed to the normalized CIE xyY -colorspace: - - x = X / (X + Y + Z) - - y = Y / (X + Y + Z) - -The x and y values are the chromaticity coordinates and can be used to -define a color without the luminance component Y. It is very confusing -to have such similar names for these colorspaces. Just be aware that if -colors are specified with lower case 'x' and 'y', then the CIE xyY -colorspace is used. Upper case 'X' and 'Y' refer to the CIE XYZ -colorspace. Also, y has nothing to do with luminance. Together x and y -specify a color, and Y the luminance. That is really all you need to -remember from a practical point of view. At the end of this section you -will find reading resources that go into much more detail if you are -interested. - -A monitor or TV will reproduce colors by emitting light at three -different wavelengths, the combination of which will stimulate the color -receptors in the eye and thus cause the perception of color. -Historically these wavelengths were defined by the red, green and blue -phosphors used in the displays. These *color primaries* are part of what -defines a colorspace. - -Different display devices will have different primaries and some -primaries are more suitable for some display technologies than others. -This has resulted in a variety of colorspaces that are used for -different display technologies or uses. To define a colorspace you need -to define the three color primaries (these are typically defined as x, y -chromaticity coordinates from the CIE xyY colorspace) but also the white -reference: that is the color obtained when all three primaries are at -maximum power. This determines the relative power or energy of the -primaries. This is usually chosen to be close to daylight which has been -defined as the CIE D65 Illuminant. - -To recapitulate: the CIE XYZ colorspace uniquely identifies colors. -Other colorspaces are defined by three chromaticity coordinates defined -in the CIE xyY colorspace. Based on those a 3x3 matrix can be -constructed that transforms CIE XYZ colors to colors in the new -colorspace. - -Both the CIE XYZ and the RGB colorspace that are derived from the -specific chromaticity primaries are linear colorspaces. But neither the -eye, nor display technology is linear. Doubling the values of all -components in the linear colorspace will not be perceived as twice the -intensity of the color. So each colorspace also defines a transfer -function that takes a linear color component value and transforms it to -the non-linear component value, which is a closer match to the -non-linear performance of both the eye and displays. Linear component -values are denoted RGB, non-linear are denoted as R'G'B'. In general -colors used in graphics are all R'G'B', except in openGL which uses -linear RGB. Special care should be taken when dealing with openGL to -provide linear RGB colors or to use the built-in openGL support to apply -the inverse transfer function. - -The final piece that defines a colorspace is a function that transforms -non-linear R'G'B' to non-linear Y'CbCr. This function is determined by -the so-called luma coefficients. There may be multiple possible Y'CbCr -encodings allowed for the same colorspace. Many encodings of color -prefer to use luma (Y') and chroma (CbCr) instead of R'G'B'. Since the -human eye is more sensitive to differences in luminance than in color -this encoding allows one to reduce the amount of color information -compared to the luma data. Note that the luma (Y') is unrelated to the Y -in the CIE XYZ colorspace. Also note that Y'CbCr is often called YCbCr -or YUV even though these are strictly speaking wrong. - -Sometimes people confuse Y'CbCr as being a colorspace. This is not -correct, it is just an encoding of an R'G'B' color into luma and chroma -values. The underlying colorspace that is associated with the R'G'B' -color is also associated with the Y'CbCr color. - -The final step is how the RGB, R'G'B' or Y'CbCr values are quantized. -The CIE XYZ colorspace where X, Y and Z are in the range [0…1] describes -all colors that humans can perceive, but the transform to another -colorspace will produce colors that are outside the [0…1] range. Once -clamped to the [0…1] range those colors can no longer be reproduced in -that colorspace. This clamping is what reduces the extent or gamut of -the colorspace. How the range of [0…1] is translated to integer values -in the range of [0…255] (or higher, depending on the color depth) is -called the quantization. This is *not* part of the colorspace -definition. In practice RGB or R'G'B' values are full range, i.e. they -use the full [0…255] range. Y'CbCr values on the other hand are limited -range with Y' using [16…235] and Cb and Cr using [16…240]. - -Unfortunately, in some cases limited range RGB is also used where the -components use the range [16…235]. And full range Y'CbCr also exists -using the [0…255] range. - -In order to correctly interpret a color you need to know the -quantization range, whether it is R'G'B' or Y'CbCr, the used Y'CbCr -encoding and the colorspace. From that information you can calculate the -corresponding CIE XYZ color and map that again to whatever colorspace -your display device uses. - -The colorspace definition itself consists of the three chromaticity -primaries, the white reference chromaticity, a transfer function and the -luma coefficients needed to transform R'G'B' to Y'CbCr. While some -colorspace standards correctly define all four, quite often the -colorspace standard only defines some, and you have to rely on other -standards for the missing pieces. The fact that colorspaces are often a -mix of different standards also led to very confusing naming conventions -where the name of a standard was used to name a colorspace when in fact -that standard was part of various other colorspaces as well. - -If you want to read more about colors and colorspaces, then the -following resources are useful: :ref:`poynton` is a good practical -book for video engineers, :ref:`colimg` has a much broader scope and -describes many more aspects of color (physics, chemistry, biology, -etc.). The -`http://www.brucelindbloom.com <http://www.brucelindbloom.com>`__ -website is an excellent resource, especially with respect to the -mathematics behind colorspace conversions. The wikipedia -`CIE 1931 colorspace <http://en.wikipedia.org/wiki/CIE_1931_color_space#CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space>`__ -article is also very useful. diff --git a/Documentation/media/uapi/v4l/common-defs.rst b/Documentation/media/uapi/v4l/common-defs.rst deleted file mode 100644 index 504c6c93c9b0..000000000000 --- a/Documentation/media/uapi/v4l/common-defs.rst +++ /dev/null @@ -1,20 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _common-defs: - -****************************************************** -Common definitions for V4L2 and V4L2 subdev interfaces -****************************************************** - - -.. toctree:: - :maxdepth: 1 - - selections-common diff --git a/Documentation/media/uapi/v4l/common.rst b/Documentation/media/uapi/v4l/common.rst deleted file mode 100644 index 5e87ae24e4b4..000000000000 --- a/Documentation/media/uapi/v4l/common.rst +++ /dev/null @@ -1,64 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _common: - -################### -Common API Elements -################### -Programming a V4L2 device consists of these steps: - -- Opening the device - -- Changing device properties, selecting a video and audio input, video - standard, picture brightness a. o. - -- Negotiating a data format - -- Negotiating an input/output method - -- The actual input/output loop - -- Closing the device - -In practice most steps are optional and can be executed out of order. It -depends on the V4L2 device type, you can read about the details in -:ref:`devices`. In this chapter we will discuss the basic concepts -applicable to all devices. - - -.. toctree:: - :maxdepth: 1 - - open - querycap - app-pri - video - audio - tuner - standard - dv-timings - control - extended-controls - ext-ctrls-camera - ext-ctrls-flash - ext-ctrls-image-source - ext-ctrls-image-process - ext-ctrls-codec - ext-ctrls-jpeg - ext-ctrls-dv - ext-ctrls-rf-tuner - ext-ctrls-fm-tx - ext-ctrls-fm-rx - ext-ctrls-detect - format - planar-apis - selection-api - crop - streaming-par diff --git a/Documentation/media/uapi/v4l/compat.rst b/Documentation/media/uapi/v4l/compat.rst deleted file mode 100644 index f35575a300b4..000000000000 --- a/Documentation/media/uapi/v4l/compat.rst +++ /dev/null @@ -1,25 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _compat: - -******* -Changes -******* - -The following chapters document the evolution of the V4L2 API, errata or -extensions. They are also intended to help application and driver -writers to port or update their code. - - -.. toctree:: - :maxdepth: 1 - - diff-v4l - hist-v4l2 diff --git a/Documentation/media/uapi/v4l/constraints.svg b/Documentation/media/uapi/v4l/constraints.svg deleted file mode 100644 index 08f9f8b0985e..000000000000 --- a/Documentation/media/uapi/v4l/constraints.svg +++ /dev/null @@ -1,37 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!-- - This file is dual-licensed: you can use it either under the terms - of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this - dual licensing only applies to this file, and not this project as a - whole. - - a) This file is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation version 2 of - the License. - - This file is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - Or, alternatively, - - b) Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _control: - -************* -User Controls -************* - -Devices typically have a number of user-settable controls such as -brightness, saturation and so on, which would be presented to the user -on a graphical user interface. But, different devices will have -different controls available, and furthermore, the range of possible -values, and the default value will vary from device to device. The -control ioctls provide the information and a mechanism to create a nice -user interface for these controls that will work correctly with any -device. - -All controls are accessed using an ID value. V4L2 defines several IDs -for specific purposes. Drivers can also implement their own custom -controls using ``V4L2_CID_PRIVATE_BASE`` [#f1]_ and higher values. The -pre-defined control IDs have the prefix ``V4L2_CID_``, and are listed in -:ref:`control-id`. The ID is used when querying the attributes of a -control, and when getting or setting the current value. - -Generally applications should present controls to the user without -assumptions about their purpose. Each control comes with a name string -the user is supposed to understand. When the purpose is non-intuitive -the driver writer should provide a user manual, a user interface plug-in -or a driver specific panel application. Predefined IDs were introduced -to change a few controls programmatically, for example to mute a device -during a channel switch. - -Drivers may enumerate different controls after switching the current -video input or output, tuner or modulator, or audio input or output. -Different in the sense of other bounds, another default and current -value, step size or other menu items. A control with a certain *custom* -ID can also change name and type. - -If a control is not applicable to the current configuration of the -device (for example, it doesn't apply to the current video input) -drivers set the ``V4L2_CTRL_FLAG_INACTIVE`` flag. - -Control values are stored globally, they do not change when switching -except to stay within the reported bounds. They also do not change e. g. -when the device is opened or closed, when the tuner radio frequency is -changed or generally never without application request. - -V4L2 specifies an event mechanism to notify applications when controls -change value (see -:ref:`VIDIOC_SUBSCRIBE_EVENT`, event -``V4L2_EVENT_CTRL``), panel applications might want to make use of that -in order to always reflect the correct control value. - -All controls use machine endianness. - - -.. _control-id: - -Control IDs -=========== - -``V4L2_CID_BASE`` - First predefined ID, equal to ``V4L2_CID_BRIGHTNESS``. - -``V4L2_CID_USER_BASE`` - Synonym of ``V4L2_CID_BASE``. - -``V4L2_CID_BRIGHTNESS`` ``(integer)`` - Picture brightness, or more precisely, the black level. - -``V4L2_CID_CONTRAST`` ``(integer)`` - Picture contrast or luma gain. - -``V4L2_CID_SATURATION`` ``(integer)`` - Picture color saturation or chroma gain. - -``V4L2_CID_HUE`` ``(integer)`` - Hue or color balance. - -``V4L2_CID_AUDIO_VOLUME`` ``(integer)`` - Overall audio volume. Note some drivers also provide an OSS or ALSA - mixer interface. - -``V4L2_CID_AUDIO_BALANCE`` ``(integer)`` - Audio stereo balance. Minimum corresponds to all the way left, - maximum to right. - -``V4L2_CID_AUDIO_BASS`` ``(integer)`` - Audio bass adjustment. - -``V4L2_CID_AUDIO_TREBLE`` ``(integer)`` - Audio treble adjustment. - -``V4L2_CID_AUDIO_MUTE`` ``(boolean)`` - Mute audio, i. e. set the volume to zero, however without affecting - ``V4L2_CID_AUDIO_VOLUME``. Like ALSA drivers, V4L2 drivers must mute - at load time to avoid excessive noise. Actually the entire device - should be reset to a low power consumption state. - -``V4L2_CID_AUDIO_LOUDNESS`` ``(boolean)`` - Loudness mode (bass boost). - -``V4L2_CID_BLACK_LEVEL`` ``(integer)`` - Another name for brightness (not a synonym of - ``V4L2_CID_BRIGHTNESS``). This control is deprecated and should not - be used in new drivers and applications. - -``V4L2_CID_AUTO_WHITE_BALANCE`` ``(boolean)`` - Automatic white balance (cameras). - -``V4L2_CID_DO_WHITE_BALANCE`` ``(button)`` - This is an action control. When set (the value is ignored), the - device will do a white balance and then hold the current setting. - Contrast this with the boolean ``V4L2_CID_AUTO_WHITE_BALANCE``, - which, when activated, keeps adjusting the white balance. - -``V4L2_CID_RED_BALANCE`` ``(integer)`` - Red chroma balance. - -``V4L2_CID_BLUE_BALANCE`` ``(integer)`` - Blue chroma balance. - -``V4L2_CID_GAMMA`` ``(integer)`` - Gamma adjust. - -``V4L2_CID_WHITENESS`` ``(integer)`` - Whiteness for grey-scale devices. This is a synonym for - ``V4L2_CID_GAMMA``. This control is deprecated and should not be - used in new drivers and applications. - -``V4L2_CID_EXPOSURE`` ``(integer)`` - Exposure (cameras). [Unit?] - -``V4L2_CID_AUTOGAIN`` ``(boolean)`` - Automatic gain/exposure control. - -``V4L2_CID_GAIN`` ``(integer)`` - Gain control. - - Primarily used to control gain on e.g. TV tuners but also on - webcams. Most devices control only digital gain with this control - but on some this could include analogue gain as well. Devices that - recognise the difference between digital and analogue gain use - controls ``V4L2_CID_DIGITAL_GAIN`` and ``V4L2_CID_ANALOGUE_GAIN``. - -``V4L2_CID_HFLIP`` ``(boolean)`` - Mirror the picture horizontally. - -``V4L2_CID_VFLIP`` ``(boolean)`` - Mirror the picture vertically. - -.. _v4l2-power-line-frequency: - -``V4L2_CID_POWER_LINE_FREQUENCY`` ``(enum)`` - Enables a power line frequency filter to avoid flicker. Possible - values for ``enum v4l2_power_line_frequency`` are: - ``V4L2_CID_POWER_LINE_FREQUENCY_DISABLED`` (0), - ``V4L2_CID_POWER_LINE_FREQUENCY_50HZ`` (1), - ``V4L2_CID_POWER_LINE_FREQUENCY_60HZ`` (2) and - ``V4L2_CID_POWER_LINE_FREQUENCY_AUTO`` (3). - -``V4L2_CID_HUE_AUTO`` ``(boolean)`` - Enables automatic hue control by the device. The effect of setting - ``V4L2_CID_HUE`` while automatic hue control is enabled is - undefined, drivers should ignore such request. - -``V4L2_CID_WHITE_BALANCE_TEMPERATURE`` ``(integer)`` - This control specifies the white balance settings as a color - temperature in Kelvin. A driver should have a minimum of 2800 - (incandescent) to 6500 (daylight). For more information about color - temperature see - `Wikipedia <http://en.wikipedia.org/wiki/Color_temperature>`__. - -``V4L2_CID_SHARPNESS`` ``(integer)`` - Adjusts the sharpness filters in a camera. The minimum value - disables the filters, higher values give a sharper picture. - -``V4L2_CID_BACKLIGHT_COMPENSATION`` ``(integer)`` - Adjusts the backlight compensation in a camera. The minimum value - disables backlight compensation. - -``V4L2_CID_CHROMA_AGC`` ``(boolean)`` - Chroma automatic gain control. - -``V4L2_CID_CHROMA_GAIN`` ``(integer)`` - Adjusts the Chroma gain control (for use when chroma AGC is - disabled). - -``V4L2_CID_COLOR_KILLER`` ``(boolean)`` - Enable the color killer (i. e. force a black & white image in case - of a weak video signal). - -.. _v4l2-colorfx: - -``V4L2_CID_COLORFX`` ``(enum)`` - Selects a color effect. The following values are defined: - - - -.. tabularcolumns:: |p{5.5cm}|p{12cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 11 24 - - * - ``V4L2_COLORFX_NONE`` - - Color effect is disabled. - * - ``V4L2_COLORFX_ANTIQUE`` - - An aging (old photo) effect. - * - ``V4L2_COLORFX_ART_FREEZE`` - - Frost color effect. - * - ``V4L2_COLORFX_AQUA`` - - Water color, cool tone. - * - ``V4L2_COLORFX_BW`` - - Black and white. - * - ``V4L2_COLORFX_EMBOSS`` - - Emboss, the highlights and shadows replace light/dark boundaries - and low contrast areas are set to a gray background. - * - ``V4L2_COLORFX_GRASS_GREEN`` - - Grass green. - * - ``V4L2_COLORFX_NEGATIVE`` - - Negative. - * - ``V4L2_COLORFX_SEPIA`` - - Sepia tone. - * - ``V4L2_COLORFX_SKETCH`` - - Sketch. - * - ``V4L2_COLORFX_SKIN_WHITEN`` - - Skin whiten. - * - ``V4L2_COLORFX_SKY_BLUE`` - - Sky blue. - * - ``V4L2_COLORFX_SOLARIZATION`` - - Solarization, the image is partially reversed in tone, only color - values above or below a certain threshold are inverted. - * - ``V4L2_COLORFX_SILHOUETTE`` - - Silhouette (outline). - * - ``V4L2_COLORFX_VIVID`` - - Vivid colors. - * - ``V4L2_COLORFX_SET_CBCR`` - - The Cb and Cr chroma components are replaced by fixed coefficients - determined by ``V4L2_CID_COLORFX_CBCR`` control. - - - -``V4L2_CID_COLORFX_CBCR`` ``(integer)`` - Determines the Cb and Cr coefficients for ``V4L2_COLORFX_SET_CBCR`` - color effect. Bits [7:0] of the supplied 32 bit value are - interpreted as Cr component, bits [15:8] as Cb component and bits - [31:16] must be zero. - -``V4L2_CID_AUTOBRIGHTNESS`` ``(boolean)`` - Enable Automatic Brightness. - -``V4L2_CID_ROTATE`` ``(integer)`` - Rotates the image by specified angle. Common angles are 90, 270 and - 180. Rotating the image to 90 and 270 will reverse the height and - width of the display window. It is necessary to set the new height - and width of the picture using the - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl according to the - rotation angle selected. - -``V4L2_CID_BG_COLOR`` ``(integer)`` - Sets the background color on the current output device. Background - color needs to be specified in the RGB24 format. The supplied 32 bit - value is interpreted as bits 0-7 Red color information, bits 8-15 - Green color information, bits 16-23 Blue color information and bits - 24-31 must be zero. - -``V4L2_CID_ILLUMINATORS_1 V4L2_CID_ILLUMINATORS_2`` ``(boolean)`` - Switch on or off the illuminator 1 or 2 of the device (usually a - microscope). - -``V4L2_CID_MIN_BUFFERS_FOR_CAPTURE`` ``(integer)`` - This is a read-only control that can be read by the application and - used as a hint to determine the number of CAPTURE buffers to pass to - REQBUFS. The value is the minimum number of CAPTURE buffers that is - necessary for hardware to work. - -``V4L2_CID_MIN_BUFFERS_FOR_OUTPUT`` ``(integer)`` - This is a read-only control that can be read by the application and - used as a hint to determine the number of OUTPUT buffers to pass to - REQBUFS. The value is the minimum number of OUTPUT buffers that is - necessary for hardware to work. - -.. _v4l2-alpha-component: - -``V4L2_CID_ALPHA_COMPONENT`` ``(integer)`` - Sets the alpha color component. When a capture device (or capture - queue of a mem-to-mem device) produces a frame format that includes - an alpha component (e.g. - :ref:`packed RGB image formats <pixfmt-rgb>`) and the alpha value - is not defined by the device or the mem-to-mem input data this - control lets you select the alpha component value of all pixels. - When an output device (or output queue of a mem-to-mem device) - consumes a frame format that doesn't include an alpha component and - the device supports alpha channel processing this control lets you - set the alpha component value of all pixels for further processing - in the device. - -``V4L2_CID_LASTP1`` - End of the predefined control IDs (currently - ``V4L2_CID_ALPHA_COMPONENT`` + 1). - -``V4L2_CID_PRIVATE_BASE`` - ID of the first custom (driver specific) control. Applications - depending on particular custom controls should check the driver name - and version, see :ref:`querycap`. - -Applications can enumerate the available controls with the -:ref:`VIDIOC_QUERYCTRL` and -:ref:`VIDIOC_QUERYMENU <VIDIOC_QUERYCTRL>` ioctls, get and set a -control value with the :ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and -:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls. Drivers must implement -``VIDIOC_QUERYCTRL``, ``VIDIOC_G_CTRL`` and ``VIDIOC_S_CTRL`` when the -device has one or more controls, ``VIDIOC_QUERYMENU`` when it has one or -more menu type controls. - - -.. _enum_all_controls: - -Example: Enumerating all controls -================================= - -.. code-block:: c - - struct v4l2_queryctrl queryctrl; - struct v4l2_querymenu querymenu; - - static void enumerate_menu(__u32 id) - { - printf(" Menu items:\\n"); - - memset(&querymenu, 0, sizeof(querymenu)); - querymenu.id = id; - - for (querymenu.index = queryctrl.minimum; - querymenu.index <= queryctrl.maximum; - querymenu.index++) { - if (0 == ioctl(fd, VIDIOC_QUERYMENU, &querymenu)) { - printf(" %s\\n", querymenu.name); - } - } - } - - memset(&queryctrl, 0, sizeof(queryctrl)); - - queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL; - while (0 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) { - if (!(queryctrl.flags & V4L2_CTRL_FLAG_DISABLED)) { - printf("Control %s\\n", queryctrl.name); - - if (queryctrl.type == V4L2_CTRL_TYPE_MENU) - enumerate_menu(queryctrl.id); - } - - queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL; - } - if (errno != EINVAL) { - perror("VIDIOC_QUERYCTRL"); - exit(EXIT_FAILURE); - } - -Example: Enumerating all controls including compound controls -============================================================= - -.. code-block:: c - - struct v4l2_query_ext_ctrl query_ext_ctrl; - - memset(&query_ext_ctrl, 0, sizeof(query_ext_ctrl)); - - query_ext_ctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND; - while (0 == ioctl(fd, VIDIOC_QUERY_EXT_CTRL, &query_ext_ctrl)) { - if (!(query_ext_ctrl.flags & V4L2_CTRL_FLAG_DISABLED)) { - printf("Control %s\\n", query_ext_ctrl.name); - - if (query_ext_ctrl.type == V4L2_CTRL_TYPE_MENU) - enumerate_menu(query_ext_ctrl.id); - } - - query_ext_ctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND; - } - if (errno != EINVAL) { - perror("VIDIOC_QUERY_EXT_CTRL"); - exit(EXIT_FAILURE); - } - -Example: Enumerating all user controls (old style) -================================================== - -.. code-block:: c - - - memset(&queryctrl, 0, sizeof(queryctrl)); - - for (queryctrl.id = V4L2_CID_BASE; - queryctrl.id < V4L2_CID_LASTP1; - queryctrl.id++) { - if (0 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) { - if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED) - continue; - - printf("Control %s\\n", queryctrl.name); - - if (queryctrl.type == V4L2_CTRL_TYPE_MENU) - enumerate_menu(queryctrl.id); - } else { - if (errno == EINVAL) - continue; - - perror("VIDIOC_QUERYCTRL"); - exit(EXIT_FAILURE); - } - } - - for (queryctrl.id = V4L2_CID_PRIVATE_BASE;; - queryctrl.id++) { - if (0 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) { - if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED) - continue; - - printf("Control %s\\n", queryctrl.name); - - if (queryctrl.type == V4L2_CTRL_TYPE_MENU) - enumerate_menu(queryctrl.id); - } else { - if (errno == EINVAL) - break; - - perror("VIDIOC_QUERYCTRL"); - exit(EXIT_FAILURE); - } - } - - -Example: Changing controls -========================== - -.. code-block:: c - - struct v4l2_queryctrl queryctrl; - struct v4l2_control control; - - memset(&queryctrl, 0, sizeof(queryctrl)); - queryctrl.id = V4L2_CID_BRIGHTNESS; - - if (-1 == ioctl(fd, VIDIOC_QUERYCTRL, &queryctrl)) { - if (errno != EINVAL) { - perror("VIDIOC_QUERYCTRL"); - exit(EXIT_FAILURE); - } else { - printf("V4L2_CID_BRIGHTNESS is not supportedn"); - } - } else if (queryctrl.flags & V4L2_CTRL_FLAG_DISABLED) { - printf("V4L2_CID_BRIGHTNESS is not supportedn"); - } else { - memset(&control, 0, sizeof (control)); - control.id = V4L2_CID_BRIGHTNESS; - control.value = queryctrl.default_value; - - if (-1 == ioctl(fd, VIDIOC_S_CTRL, &control)) { - perror("VIDIOC_S_CTRL"); - exit(EXIT_FAILURE); - } - } - - memset(&control, 0, sizeof(control)); - control.id = V4L2_CID_CONTRAST; - - if (0 == ioctl(fd, VIDIOC_G_CTRL, &control)) { - control.value += 1; - - /* The driver may clamp the value or return ERANGE, ignored here */ - - if (-1 == ioctl(fd, VIDIOC_S_CTRL, &control) - && errno != ERANGE) { - perror("VIDIOC_S_CTRL"); - exit(EXIT_FAILURE); - } - /* Ignore if V4L2_CID_CONTRAST is unsupported */ - } else if (errno != EINVAL) { - perror("VIDIOC_G_CTRL"); - exit(EXIT_FAILURE); - } - - control.id = V4L2_CID_AUDIO_MUTE; - control.value = 1; /* silence */ - - /* Errors ignored */ - ioctl(fd, VIDIOC_S_CTRL, &control); - -.. [#f1] - The use of ``V4L2_CID_PRIVATE_BASE`` is problematic because different - drivers may use the same ``V4L2_CID_PRIVATE_BASE`` ID for different - controls. This makes it hard to programmatically set such controls - since the meaning of the control with that ID is driver dependent. In - order to resolve this drivers use unique IDs and the - ``V4L2_CID_PRIVATE_BASE`` IDs are mapped to those unique IDs by the - kernel. Consider these ``V4L2_CID_PRIVATE_BASE`` IDs as aliases to - the real IDs. - - Many applications today still use the ``V4L2_CID_PRIVATE_BASE`` IDs - instead of using :ref:`VIDIOC_QUERYCTRL` with - the ``V4L2_CTRL_FLAG_NEXT_CTRL`` flag to enumerate all IDs, so - support for ``V4L2_CID_PRIVATE_BASE`` is still around. diff --git a/Documentation/media/uapi/v4l/crop.rst b/Documentation/media/uapi/v4l/crop.rst deleted file mode 100644 index ada7c22e6291..000000000000 --- a/Documentation/media/uapi/v4l/crop.rst +++ /dev/null @@ -1,324 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _crop: - -***************************************************** -Image Cropping, Insertion and Scaling -- the CROP API -***************************************************** - -.. note:: - - The CROP API is mostly superseded by the newer :ref:`SELECTION API - <selection-api>`. The new API should be preferred in most cases, - with the exception of pixel aspect ratio detection, which is - implemented by :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` and has no - equivalent in the SELECTION API. See :ref:`selection-vs-crop` for a - comparison of the two APIs. - -Some video capture devices can sample a subsection of the picture and -shrink or enlarge it to an image of arbitrary size. We call these -abilities cropping and scaling. Some video output devices can scale an -image up or down and insert it at an arbitrary scan line and horizontal -offset into a video signal. - -Applications can use the following API to select an area in the video -signal, query the default area and the hardware limits. - -.. note:: - - Despite their name, the :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>`, - :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and :ref:`VIDIOC_S_CROP - <VIDIOC_G_CROP>` ioctls apply to input as well as output devices. - -Scaling requires a source and a target. On a video capture or overlay -device the source is the video signal, and the cropping ioctls determine -the area actually sampled. The target are images read by the application -or overlaid onto the graphics screen. Their size (and position for an -overlay) is negotiated with the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` -and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls. - -On a video output device the source are the images passed in by the -application, and their size is again negotiated with the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -ioctls, or may be encoded in a compressed video stream. The target is -the video signal, and the cropping ioctls determine the area where the -images are inserted. - -Source and target rectangles are defined even if the device does not -support scaling or the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and -:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` ioctls. Their size (and position -where applicable) will be fixed in this case. - -.. note:: - - All capture and output devices that support the CROP or SELECTION - API will also support the :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` - ioctl. - -Cropping Structures -=================== - - -.. _crop-scale: - -.. kernel-figure:: crop.svg - :alt: crop.svg - :align: center - - Image Cropping, Insertion and Scaling - - The cropping, insertion and scaling process - - - -For capture devices the coordinates of the top left corner, width and -height of the area which can be sampled is given by the ``bounds`` -substructure of the struct :c:type:`v4l2_cropcap` returned -by the :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` ioctl. To support a wide -range of hardware this specification does not define an origin or units. -However by convention drivers should horizontally count unscaled samples -relative to 0H (the leading edge of the horizontal sync pulse, see -:ref:`vbi-hsync`). Vertically ITU-R line numbers of the first field -(see ITU R-525 line numbering for :ref:`525 lines <vbi-525>` and for -:ref:`625 lines <vbi-625>`), multiplied by two if the driver -can capture both fields. - -The top left corner, width and height of the source rectangle, that is -the area actually sampled, is given by struct -:c:type:`v4l2_crop` using the same coordinate system as -struct :c:type:`v4l2_cropcap`. Applications can use the -:ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` -ioctls to get and set this rectangle. It must lie completely within the -capture boundaries and the driver may further adjust the requested size -and/or position according to hardware limitations. - -Each capture device has a default source rectangle, given by the -``defrect`` substructure of struct -:c:type:`v4l2_cropcap`. The center of this rectangle -shall align with the center of the active picture area of the video -signal, and cover what the driver writer considers the complete picture. -Drivers shall reset the source rectangle to the default when the driver -is first loaded, but not later. - -For output devices these structures and ioctls are used accordingly, -defining the *target* rectangle where the images will be inserted into -the video signal. - - -Scaling Adjustments -=================== - -Video hardware can have various cropping, insertion and scaling -limitations. It may only scale up or down, support only discrete scaling -factors, or have different scaling abilities in horizontal and vertical -direction. Also it may not support scaling at all. At the same time the -struct :c:type:`v4l2_crop` rectangle may have to be aligned, -and both the source and target rectangles may have arbitrary upper and -lower size limits. In particular the maximum ``width`` and ``height`` in -struct :c:type:`v4l2_crop` may be smaller than the struct -:c:type:`v4l2_cropcap`. ``bounds`` area. Therefore, as -usual, drivers are expected to adjust the requested parameters and -return the actual values selected. - -Applications can change the source or the target rectangle first, as -they may prefer a particular image size or a certain area in the video -signal. If the driver has to adjust both to satisfy hardware -limitations, the last requested rectangle shall take priority, and the -driver should preferably adjust the opposite one. The -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl however shall not change -the driver state and therefore only adjust the requested rectangle. - -Suppose scaling on a video capture device is restricted to a factor 1:1 -or 2:1 in either direction and the target image size must be a multiple -of 16 × 16 pixels. The source cropping rectangle is set to defaults, -which are also the upper limit in this example, of 640 × 400 pixels at -offset 0, 0. An application requests an image size of 300 × 225 pixels, -assuming video will be scaled down from the "full picture" accordingly. -The driver sets the image size to the closest possible values 304 × 224, -then chooses the cropping rectangle closest to the requested size, that -is 608 × 224 (224 × 2:1 would exceed the limit 400). The offset 0, 0 is -still valid, thus unmodified. Given the default cropping rectangle -reported by :ref:`VIDIOC_CROPCAP <VIDIOC_CROPCAP>` the application can -easily propose another offset to center the cropping rectangle. - -Now the application may insist on covering an area using a picture -aspect ratio closer to the original request, so it asks for a cropping -rectangle of 608 × 456 pixels. The present scaling factors limit -cropping to 640 × 384, so the driver returns the cropping size 608 × 384 -and adjusts the image size to closest possible 304 × 192. - - -Examples -======== - -Source and target rectangles shall remain unchanged across closing and -reopening a device, such that piping data into or out of a device will -work without special preparations. More advanced applications should -ensure the parameters are suitable before starting I/O. - -.. note:: - - On the next two examples, a video capture device is assumed; - change ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` for other types of device. - -Example: Resetting the cropping parameters -========================================== - -.. code-block:: c - - struct v4l2_cropcap cropcap; - struct v4l2_crop crop; - - memset (&cropcap, 0, sizeof (cropcap)); - cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (-1 == ioctl (fd, VIDIOC_CROPCAP, &cropcap)) { - perror ("VIDIOC_CROPCAP"); - exit (EXIT_FAILURE); - } - - memset (&crop, 0, sizeof (crop)); - crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - crop.c = cropcap.defrect; - - /* Ignore if cropping is not supported (EINVAL). */ - - if (-1 == ioctl (fd, VIDIOC_S_CROP, &crop) - && errno != EINVAL) { - perror ("VIDIOC_S_CROP"); - exit (EXIT_FAILURE); - } - - -Example: Simple downscaling -=========================== - -.. code-block:: c - - struct v4l2_cropcap cropcap; - struct v4l2_format format; - - reset_cropping_parameters (); - - /* Scale down to 1/4 size of full picture. */ - - memset (&format, 0, sizeof (format)); /* defaults */ - - format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - format.fmt.pix.width = cropcap.defrect.width >> 1; - format.fmt.pix.height = cropcap.defrect.height >> 1; - format.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; - - if (-1 == ioctl (fd, VIDIOC_S_FMT, &format)) { - perror ("VIDIOC_S_FORMAT"); - exit (EXIT_FAILURE); - } - - /* We could check the actual image size now, the actual scaling factor - or if the driver can scale at all. */ - -Example: Selecting an output area -================================= - -.. note:: This example assumes an output device. - -.. code-block:: c - - struct v4l2_cropcap cropcap; - struct v4l2_crop crop; - - memset (&cropcap, 0, sizeof (cropcap)); - cropcap.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; - - if (-1 == ioctl (fd, VIDIOC_CROPCAP;, &cropcap)) { - perror ("VIDIOC_CROPCAP"); - exit (EXIT_FAILURE); - } - - memset (&crop, 0, sizeof (crop)); - - crop.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; - crop.c = cropcap.defrect; - - /* Scale the width and height to 50 % of their original size - and center the output. */ - - crop.c.width /= 2; - crop.c.height /= 2; - crop.c.left += crop.c.width / 2; - crop.c.top += crop.c.height / 2; - - /* Ignore if cropping is not supported (EINVAL). */ - - if (-1 == ioctl (fd, VIDIOC_S_CROP, &crop) - && errno != EINVAL) { - perror ("VIDIOC_S_CROP"); - exit (EXIT_FAILURE); - } - -Example: Current scaling factor and pixel aspect -================================================ - -.. note:: This example assumes a video capture device. - -.. code-block:: c - - struct v4l2_cropcap cropcap; - struct v4l2_crop crop; - struct v4l2_format format; - double hscale, vscale; - double aspect; - int dwidth, dheight; - - memset (&cropcap, 0, sizeof (cropcap)); - cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (-1 == ioctl (fd, VIDIOC_CROPCAP, &cropcap)) { - perror ("VIDIOC_CROPCAP"); - exit (EXIT_FAILURE); - } - - memset (&crop, 0, sizeof (crop)); - crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (-1 == ioctl (fd, VIDIOC_G_CROP, &crop)) { - if (errno != EINVAL) { - perror ("VIDIOC_G_CROP"); - exit (EXIT_FAILURE); - } - - /* Cropping not supported. */ - crop.c = cropcap.defrect; - } - - memset (&format, 0, sizeof (format)); - format.fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - if (-1 == ioctl (fd, VIDIOC_G_FMT, &format)) { - perror ("VIDIOC_G_FMT"); - exit (EXIT_FAILURE); - } - - /* The scaling applied by the driver. */ - - hscale = format.fmt.pix.width / (double) crop.c.width; - vscale = format.fmt.pix.height / (double) crop.c.height; - - aspect = cropcap.pixelaspect.numerator / - (double) cropcap.pixelaspect.denominator; - aspect = aspect * hscale / vscale; - - /* Devices following ITU-R BT.601 do not capture - square pixels. For playback on a computer monitor - we should scale the images to this size. */ - - dwidth = format.fmt.pix.width / aspect; - dheight = format.fmt.pix.height; diff --git a/Documentation/media/uapi/v4l/crop.svg b/Documentation/media/uapi/v4l/crop.svg deleted file mode 100644 index 32d72598d135..000000000000 --- a/Documentation/media/uapi/v4l/crop.svg +++ /dev/null @@ -1,290 +0,0 @@ -<?xml version="1.0" encoding="UTF-8" standalone="no"?> -<!-- - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _depth-formats: - -************* -Depth Formats -************* - -Depth data provides distance to points, mapped onto the image plane - - -.. toctree:: - :maxdepth: 1 - - pixfmt-inzi - pixfmt-z16 - pixfmt-cnf4 diff --git a/Documentation/media/uapi/v4l/dev-capture.rst b/Documentation/media/uapi/v4l/dev-capture.rst deleted file mode 100644 index 134e22b32338..000000000000 --- a/Documentation/media/uapi/v4l/dev-capture.rst +++ /dev/null @@ -1,111 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _capture: - -*********************** -Video Capture Interface -*********************** - -Video capture devices sample an analog video signal and store the -digitized images in memory. Today nearly all devices can capture at full -25 or 30 frames/second. With this interface applications can control the -capture process and move images from the driver into user space. - -Conventionally V4L2 video capture devices are accessed through character -device special files named ``/dev/video`` and ``/dev/video0`` to -``/dev/video63`` with major number 81 and minor numbers 0 to 63. -``/dev/video`` is typically a symbolic link to the preferred video -device. - -.. note:: The same device file names are used for video output devices. - - -Querying Capabilities -===================== - -Devices supporting the video capture interface set the -``V4L2_CAP_VIDEO_CAPTURE`` or ``V4L2_CAP_VIDEO_CAPTURE_MPLANE`` flag in -the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. As secondary device -functions they may also support the :ref:`video overlay <overlay>` -(``V4L2_CAP_VIDEO_OVERLAY``) and the :ref:`raw VBI capture <raw-vbi>` -(``V4L2_CAP_VBI_CAPTURE``) interface. At least one of the read/write or -streaming I/O methods must be supported. Tuners and audio inputs are -optional. - - -Supplemental Functions -====================== - -Video capture devices shall support :ref:`audio input <audio>`, -:ref:`tuner`, :ref:`controls <control>`, -:ref:`cropping and scaling <crop>` and -:ref:`streaming parameter <streaming-par>` ioctls as needed. The -:ref:`video input <video>` ioctls must be supported by all video -capture devices. - - -Image Format Negotiation -======================== - -The result of a capture operation is determined by cropping and image -format parameters. The former select an area of the video picture to -capture, the latter how images are stored in memory, i. e. in RGB or YUV -format, the number of bits per pixel or width and height. Together they -also define how images are scaled in the process. - -As usual these parameters are *not* reset at :ref:`open() <func-open>` -time to permit Unix tool chains, programming a device and then reading -from it as if it was a plain file. Well written V4L2 applications ensure -they really get what they want, including cropping and scaling. - -Cropping initialization at minimum requires to reset the parameters to -defaults. An example is given in :ref:`crop`. - -To query the current image format applications set the ``type`` field of -a struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or -``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and call the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer to this -structure. Drivers fill the struct -:c:type:`v4l2_pix_format` ``pix`` or the struct -:c:type:`v4l2_pix_format_mplane` ``pix_mp`` -member of the ``fmt`` union. - -To request different parameters applications set the ``type`` field of a -struct :c:type:`v4l2_format` as above and initialize all -fields of the struct :c:type:`v4l2_pix_format` -``vbi`` member of the ``fmt`` union, or better just modify the results -of :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -ioctl with a pointer to this structure. Drivers may adjust the -parameters and finally return the actual parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` -does. - -Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` the :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl -can be used to learn about hardware limitations without disabling I/O or -possibly time consuming hardware preparations. - -The contents of struct :c:type:`v4l2_pix_format` and -struct :c:type:`v4l2_pix_format_mplane` are -discussed in :ref:`pixfmt`. See also the specification of the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctls for -details. Video capture devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` -and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, even if :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ignores all -requests and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is optional. - - -Reading Images -============== - -A video capture device may support the :ref:`read() function <func-read>` -and/or streaming (:ref:`memory mapping <func-mmap>` or -:ref:`user pointer <userp>`) I/O. See :ref:`io` for details. diff --git a/Documentation/media/uapi/v4l/dev-decoder.rst b/Documentation/media/uapi/v4l/dev-decoder.rst deleted file mode 100644 index 606b54947e10..000000000000 --- a/Documentation/media/uapi/v4l/dev-decoder.rst +++ /dev/null @@ -1,1101 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 - -.. _decoder: - -************************************************* -Memory-to-Memory Stateful Video Decoder Interface -************************************************* - -A stateful video decoder takes complete chunks of the bytestream (e.g. Annex-B -H.264/HEVC stream, raw VP8/9 stream) and decodes them into raw video frames in -display order. The decoder is expected not to require any additional information -from the client to process these buffers. - -Performing software parsing, processing etc. of the stream in the driver in -order to support this interface is strongly discouraged. In case such -operations are needed, use of the Stateless Video Decoder Interface (in -development) is strongly advised. - -Conventions and Notations Used in This Document -=============================================== - -1. The general V4L2 API rules apply if not specified in this document - otherwise. - -2. The meaning of words "must", "may", "should", etc. is as per `RFC - 2119 <https://tools.ietf.org/html/rfc2119>`_. - -3. All steps not marked "optional" are required. - -4. :c:func:`VIDIOC_G_EXT_CTRLS` and :c:func:`VIDIOC_S_EXT_CTRLS` may be used - interchangeably with :c:func:`VIDIOC_G_CTRL` and :c:func:`VIDIOC_S_CTRL`, - unless specified otherwise. - -5. Single-planar API (see :ref:`planar-apis`) and applicable structures may be - used interchangeably with multi-planar API, unless specified otherwise, - depending on decoder capabilities and following the general V4L2 guidelines. - -6. i = [a..b]: sequence of integers from a to b, inclusive, i.e. i = - [0..2]: i = 0, 1, 2. - -7. Given an ``OUTPUT`` buffer A, then A’ represents a buffer on the ``CAPTURE`` - queue containing data that resulted from processing buffer A. - -.. _decoder-glossary: - -Glossary -======== - -CAPTURE - the destination buffer queue; for decoders, the queue of buffers containing - decoded frames; for encoders, the queue of buffers containing an encoded - bytestream; ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or - ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``; data is captured from the hardware - into ``CAPTURE`` buffers. - -client - the application communicating with the decoder or encoder implementing - this interface. - -coded format - encoded/compressed video bytestream format (e.g. H.264, VP8, etc.); see - also: raw format. - -coded height - height for given coded resolution. - -coded resolution - stream resolution in pixels aligned to codec and hardware requirements; - typically visible resolution rounded up to full macroblocks; - see also: visible resolution. - -coded width - width for given coded resolution. - -decode order - the order in which frames are decoded; may differ from display order if the - coded format includes a feature of frame reordering; for decoders, - ``OUTPUT`` buffers must be queued by the client in decode order; for - encoders ``CAPTURE`` buffers must be returned by the encoder in decode order. - -destination - data resulting from the decode process; see ``CAPTURE``. - -display order - the order in which frames must be displayed; for encoders, ``OUTPUT`` - buffers must be queued by the client in display order; for decoders, - ``CAPTURE`` buffers must be returned by the decoder in display order. - -DPB - Decoded Picture Buffer; an H.264/HEVC term for a buffer that stores a decoded - raw frame available for reference in further decoding steps. - -EOS - end of stream. - -IDR - Instantaneous Decoder Refresh; a type of a keyframe in an H.264/HEVC-encoded - stream, which clears the list of earlier reference frames (DPBs). - -keyframe - an encoded frame that does not reference frames decoded earlier, i.e. - can be decoded fully on its own. - -macroblock - a processing unit in image and video compression formats based on linear - block transforms (e.g. H.264, VP8, VP9); codec-specific, but for most of - popular codecs the size is 16x16 samples (pixels). - -OUTPUT - the source buffer queue; for decoders, the queue of buffers containing - an encoded bytestream; for encoders, the queue of buffers containing raw - frames; ``V4L2_BUF_TYPE_VIDEO_OUTPUT`` or - ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``; the hardware is fed with data - from ``OUTPUT`` buffers. - -PPS - Picture Parameter Set; a type of metadata entity in an H.264/HEVC bytestream. - -raw format - uncompressed format containing raw pixel data (e.g. YUV, RGB formats). - -resume point - a point in the bytestream from which decoding may start/continue, without - any previous state/data present, e.g.: a keyframe (VP8/VP9) or - SPS/PPS/IDR sequence (H.264/HEVC); a resume point is required to start decode - of a new stream, or to resume decoding after a seek. - -source - data fed to the decoder or encoder; see ``OUTPUT``. - -source height - height in pixels for given source resolution; relevant to encoders only. - -source resolution - resolution in pixels of source frames being source to the encoder and - subject to further cropping to the bounds of visible resolution; relevant to - encoders only. - -source width - width in pixels for given source resolution; relevant to encoders only. - -SPS - Sequence Parameter Set; a type of metadata entity in an H.264/HEVC bytestream. - -stream metadata - additional (non-visual) information contained inside encoded bytestream; - for example: coded resolution, visible resolution, codec profile. - -visible height - height for given visible resolution; display height. - -visible resolution - stream resolution of the visible picture, in pixels, to be used for - display purposes; must be smaller or equal to coded resolution; - display resolution. - -visible width - width for given visible resolution; display width. - -State Machine -============= - -.. kernel-render:: DOT - :alt: DOT digraph of decoder state machine - :caption: Decoder State Machine - - digraph decoder_state_machine { - node [shape = doublecircle, label="Decoding"] Decoding; - - node [shape = circle, label="Initialization"] Initialization; - node [shape = circle, label="Capture\nsetup"] CaptureSetup; - node [shape = circle, label="Dynamic\nResolution\nChange"] ResChange; - node [shape = circle, label="Stopped"] Stopped; - node [shape = circle, label="Drain"] Drain; - node [shape = circle, label="Seek"] Seek; - node [shape = circle, label="End of Stream"] EoS; - - node [shape = point]; qi - qi -> Initialization [ label = "open()" ]; - - Initialization -> CaptureSetup [ label = "CAPTURE\nformat\nestablished" ]; - - CaptureSetup -> Stopped [ label = "CAPTURE\nbuffers\nready" ]; - - Decoding -> ResChange [ label = "Stream\nresolution\nchange" ]; - Decoding -> Drain [ label = "V4L2_DEC_CMD_STOP" ]; - Decoding -> EoS [ label = "EoS mark\nin the stream" ]; - Decoding -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ]; - Decoding -> Stopped [ label = "VIDIOC_STREAMOFF(CAPTURE)" ]; - Decoding -> Decoding; - - ResChange -> CaptureSetup [ label = "CAPTURE\nformat\nestablished" ]; - ResChange -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ]; - - EoS -> Drain [ label = "Implicit\ndrain" ]; - - Drain -> Stopped [ label = "All CAPTURE\nbuffers dequeued\nor\nVIDIOC_STREAMOFF(CAPTURE)" ]; - Drain -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ]; - - Seek -> Decoding [ label = "VIDIOC_STREAMON(OUTPUT)" ]; - Seek -> Initialization [ label = "VIDIOC_REQBUFS(OUTPUT, 0)" ]; - - Stopped -> Decoding [ label = "V4L2_DEC_CMD_START\nor\nVIDIOC_STREAMON(CAPTURE)" ]; - Stopped -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ]; - } - -Querying Capabilities -===================== - -1. To enumerate the set of coded formats supported by the decoder, the - client may call :c:func:`VIDIOC_ENUM_FMT` on ``OUTPUT``. - - * The full set of supported formats will be returned, regardless of the - format set on ``CAPTURE``. - * Check the flags field of :c:type:`v4l2_fmtdesc` for more information - about the decoder's capabilities with respect to each coded format. - In particular whether or not the decoder has a full-fledged bytestream - parser and if the decoder supports dynamic resolution changes. - -2. To enumerate the set of supported raw formats, the client may call - :c:func:`VIDIOC_ENUM_FMT` on ``CAPTURE``. - - * Only the formats supported for the format currently active on ``OUTPUT`` - will be returned. - - * In order to enumerate raw formats supported by a given coded format, - the client must first set that coded format on ``OUTPUT`` and then - enumerate formats on ``CAPTURE``. - -3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported - resolutions for a given format, passing desired pixel format in - :c:type:`v4l2_frmsizeenum` ``pixel_format``. - - * Values returned by :c:func:`VIDIOC_ENUM_FRAMESIZES` for a coded pixel - format will include all possible coded resolutions supported by the - decoder for given coded pixel format. - - * Values returned by :c:func:`VIDIOC_ENUM_FRAMESIZES` for a raw pixel format - will include all possible frame buffer resolutions supported by the - decoder for given raw pixel format and the coded format currently set on - ``OUTPUT``. - -4. Supported profiles and levels for the coded format currently set on - ``OUTPUT``, if applicable, may be queried using their respective controls - via :c:func:`VIDIOC_QUERYCTRL`. - -Initialization -============== - -1. Set the coded format on ``OUTPUT`` via :c:func:`VIDIOC_S_FMT` - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - ``pixelformat`` - a coded pixel format. - - ``width``, ``height`` - coded resolution of the stream; required only if it cannot be parsed - from the stream for the given coded format; otherwise the decoder will - use this resolution as a placeholder resolution that will likely change - as soon as it can parse the actual coded resolution from the stream. - - ``sizeimage`` - desired size of ``OUTPUT`` buffers; the decoder may adjust it to - match hardware requirements. - - other fields - follow standard semantics. - - * **Return fields:** - - ``sizeimage`` - adjusted size of ``OUTPUT`` buffers. - - * The ``CAPTURE`` format will be updated with an appropriate frame buffer - resolution instantly based on the width and height returned by - :c:func:`VIDIOC_S_FMT`. - However, for coded formats that include stream resolution information, - after the decoder is done parsing the information from the stream, it will - update the ``CAPTURE`` format with new values and signal a source change - event, regardless of whether they match the values set by the client or - not. - - .. important:: - - Changing the ``OUTPUT`` format may change the currently set ``CAPTURE`` - format. How the new ``CAPTURE`` format is determined is up to the decoder - and the client must ensure it matches its needs afterwards. - -2. Allocate source (bytestream) buffers via :c:func:`VIDIOC_REQBUFS` on - ``OUTPUT``. - - * **Required fields:** - - ``count`` - requested number of buffers to allocate; greater than zero. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - ``memory`` - follows standard semantics. - - * **Return fields:** - - ``count`` - the actual number of buffers allocated. - - .. warning:: - - The actual number of allocated buffers may differ from the ``count`` - given. The client must check the updated value of ``count`` after the - call returns. - - Alternatively, :c:func:`VIDIOC_CREATE_BUFS` on the ``OUTPUT`` queue can be - used to have more control over buffer allocation. - - * **Required fields:** - - ``count`` - requested number of buffers to allocate; greater than zero. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - ``memory`` - follows standard semantics. - - ``format`` - follows standard semantics. - - * **Return fields:** - - ``count`` - adjusted to the number of allocated buffers. - - .. warning:: - - The actual number of allocated buffers may differ from the ``count`` - given. The client must check the updated value of ``count`` after the - call returns. - -3. Start streaming on the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON`. - -4. **This step only applies to coded formats that contain resolution information - in the stream.** Continue queuing/dequeuing bytestream buffers to/from the - ``OUTPUT`` queue via :c:func:`VIDIOC_QBUF` and :c:func:`VIDIOC_DQBUF`. The - buffers will be processed and returned to the client in order, until - required metadata to configure the ``CAPTURE`` queue are found. This is - indicated by the decoder sending a ``V4L2_EVENT_SOURCE_CHANGE`` event with - ``changes`` set to ``V4L2_EVENT_SRC_CH_RESOLUTION``. - - * It is not an error if the first buffer does not contain enough data for - this to occur. Processing of the buffers will continue as long as more - data is needed. - - * If data in a buffer that triggers the event is required to decode the - first frame, it will not be returned to the client, until the - initialization sequence completes and the frame is decoded. - - * If the client has not set the coded resolution of the stream on its own, - calling :c:func:`VIDIOC_G_FMT`, :c:func:`VIDIOC_S_FMT`, - :c:func:`VIDIOC_TRY_FMT` or :c:func:`VIDIOC_REQBUFS` on the ``CAPTURE`` - queue will not return the real values for the stream until a - ``V4L2_EVENT_SOURCE_CHANGE`` event with ``changes`` set to - ``V4L2_EVENT_SRC_CH_RESOLUTION`` is signaled. - - .. important:: - - Any client query issued after the decoder queues the event will return - values applying to the just parsed stream, including queue formats, - selection rectangles and controls. - - .. note:: - - A client capable of acquiring stream parameters from the bytestream on - its own may attempt to set the width and height of the ``OUTPUT`` format - to non-zero values matching the coded size of the stream, skip this step - and continue with the `Capture Setup` sequence. However, it must not - rely on any driver queries regarding stream parameters, such as - selection rectangles and controls, since the decoder has not parsed them - from the stream yet. If the values configured by the client do not match - those parsed by the decoder, a `Dynamic Resolution Change` will be - triggered to reconfigure them. - - .. note:: - - No decoded frames are produced during this phase. - -5. Continue with the `Capture Setup` sequence. - -Capture Setup -============= - -1. Call :c:func:`VIDIOC_G_FMT` on the ``CAPTURE`` queue to get format for the - destination buffers parsed/decoded from the bytestream. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - * **Return fields:** - - ``width``, ``height`` - frame buffer resolution for the decoded frames. - - ``pixelformat`` - pixel format for decoded frames. - - ``num_planes`` (for _MPLANE ``type`` only) - number of planes for pixelformat. - - ``sizeimage``, ``bytesperline`` - as per standard semantics; matching frame buffer format. - - .. note:: - - The value of ``pixelformat`` may be any pixel format supported by the - decoder for the current stream. The decoder should choose a - preferred/optimal format for the default configuration. For example, a - YUV format may be preferred over an RGB format if an additional - conversion step would be required for the latter. - -2. **Optional.** Acquire the visible resolution via - :c:func:`VIDIOC_G_SELECTION`. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``target`` - set to ``V4L2_SEL_TGT_COMPOSE``. - - * **Return fields:** - - ``r.left``, ``r.top``, ``r.width``, ``r.height`` - the visible rectangle; it must fit within the frame buffer resolution - returned by :c:func:`VIDIOC_G_FMT` on ``CAPTURE``. - - * The following selection targets are supported on ``CAPTURE``: - - ``V4L2_SEL_TGT_CROP_BOUNDS`` - corresponds to the coded resolution of the stream. - - ``V4L2_SEL_TGT_CROP_DEFAULT`` - the rectangle covering the part of the ``CAPTURE`` buffer that - contains meaningful picture data (visible area); width and height - will be equal to the visible resolution of the stream. - - ``V4L2_SEL_TGT_CROP`` - the rectangle within the coded resolution to be output to - ``CAPTURE``; defaults to ``V4L2_SEL_TGT_CROP_DEFAULT``; read-only on - hardware without additional compose/scaling capabilities. - - ``V4L2_SEL_TGT_COMPOSE_BOUNDS`` - the maximum rectangle within a ``CAPTURE`` buffer, which the cropped - frame can be composed into; equal to ``V4L2_SEL_TGT_CROP`` if the - hardware does not support compose/scaling. - - ``V4L2_SEL_TGT_COMPOSE_DEFAULT`` - equal to ``V4L2_SEL_TGT_CROP``. - - ``V4L2_SEL_TGT_COMPOSE`` - the rectangle inside a ``CAPTURE`` buffer into which the cropped - frame is written; defaults to ``V4L2_SEL_TGT_COMPOSE_DEFAULT``; - read-only on hardware without additional compose/scaling capabilities. - - ``V4L2_SEL_TGT_COMPOSE_PADDED`` - the rectangle inside a ``CAPTURE`` buffer which is overwritten by the - hardware; equal to ``V4L2_SEL_TGT_COMPOSE`` if the hardware does not - write padding pixels. - - .. warning:: - - The values are guaranteed to be meaningful only after the decoder - successfully parses the stream metadata. The client must not rely on the - query before that happens. - -3. **Optional.** Enumerate ``CAPTURE`` formats via :c:func:`VIDIOC_ENUM_FMT` on - the ``CAPTURE`` queue. Once the stream information is parsed and known, the - client may use this ioctl to discover which raw formats are supported for - given stream and select one of them via :c:func:`VIDIOC_S_FMT`. - - .. important:: - - The decoder will return only formats supported for the currently - established coded format, as per the ``OUTPUT`` format and/or stream - metadata parsed in this initialization sequence, even if more formats - may be supported by the decoder in general. In other words, the set - returned will be a subset of the initial query mentioned in the - `Querying Capabilities` section. - - For example, a decoder may support YUV and RGB formats for resolutions - 1920x1088 and lower, but only YUV for higher resolutions (due to - hardware limitations). After parsing a resolution of 1920x1088 or lower, - :c:func:`VIDIOC_ENUM_FMT` may return a set of YUV and RGB pixel formats, - but after parsing resolution higher than 1920x1088, the decoder will not - return RGB, unsupported for this resolution. - - However, subsequent resolution change event triggered after - discovering a resolution change within the same stream may switch - the stream into a lower resolution and :c:func:`VIDIOC_ENUM_FMT` - would return RGB formats again in that case. - -4. **Optional.** Set the ``CAPTURE`` format via :c:func:`VIDIOC_S_FMT` on the - ``CAPTURE`` queue. The client may choose a different format than - selected/suggested by the decoder in :c:func:`VIDIOC_G_FMT`. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``pixelformat`` - a raw pixel format. - - ``width``, ``height`` - frame buffer resolution of the decoded stream; typically unchanged from - what was returned with :c:func:`VIDIOC_G_FMT`, but it may be different - if the hardware supports composition and/or scaling. - - * Setting the ``CAPTURE`` format will reset the compose selection rectangles - to their default values, based on the new resolution, as described in the - previous step. - -5. **Optional.** Set the compose rectangle via :c:func:`VIDIOC_S_SELECTION` on - the ``CAPTURE`` queue if it is desired and if the decoder has compose and/or - scaling capabilities. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``target`` - set to ``V4L2_SEL_TGT_COMPOSE``. - - ``r.left``, ``r.top``, ``r.width``, ``r.height`` - the rectangle inside a ``CAPTURE`` buffer into which the cropped - frame is written; defaults to ``V4L2_SEL_TGT_COMPOSE_DEFAULT``; - read-only on hardware without additional compose/scaling capabilities. - - * **Return fields:** - - ``r.left``, ``r.top``, ``r.width``, ``r.height`` - the visible rectangle; it must fit within the frame buffer resolution - returned by :c:func:`VIDIOC_G_FMT` on ``CAPTURE``. - - .. warning:: - - The decoder may adjust the compose rectangle to the nearest - supported one to meet codec and hardware requirements. The client needs - to check the adjusted rectangle returned by :c:func:`VIDIOC_S_SELECTION`. - -6. If all the following conditions are met, the client may resume the decoding - instantly: - - * ``sizeimage`` of the new format (determined in previous steps) is less - than or equal to the size of currently allocated buffers, - - * the number of buffers currently allocated is greater than or equal to the - minimum number of buffers acquired in previous steps. To fulfill this - requirement, the client may use :c:func:`VIDIOC_CREATE_BUFS` to add new - buffers. - - In that case, the remaining steps do not apply and the client may resume - the decoding by one of the following actions: - - * if the ``CAPTURE`` queue is streaming, call :c:func:`VIDIOC_DECODER_CMD` - with the ``V4L2_DEC_CMD_START`` command, - - * if the ``CAPTURE`` queue is not streaming, call :c:func:`VIDIOC_STREAMON` - on the ``CAPTURE`` queue. - - However, if the client intends to change the buffer set, to lower - memory usage or for any other reasons, it may be achieved by following - the steps below. - -7. **If the** ``CAPTURE`` **queue is streaming,** keep queuing and dequeuing - buffers on the ``CAPTURE`` queue until a buffer marked with the - ``V4L2_BUF_FLAG_LAST`` flag is dequeued. - -8. **If the** ``CAPTURE`` **queue is streaming,** call :c:func:`VIDIOC_STREAMOFF` - on the ``CAPTURE`` queue to stop streaming. - - .. warning:: - - The ``OUTPUT`` queue must remain streaming. Calling - :c:func:`VIDIOC_STREAMOFF` on it would abort the sequence and trigger a - seek. - -9. **If the** ``CAPTURE`` **queue has buffers allocated,** free the ``CAPTURE`` - buffers using :c:func:`VIDIOC_REQBUFS`. - - * **Required fields:** - - ``count`` - set to 0. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``memory`` - follows standard semantics. - -10. Allocate ``CAPTURE`` buffers via :c:func:`VIDIOC_REQBUFS` on the - ``CAPTURE`` queue. - - * **Required fields:** - - ``count`` - requested number of buffers to allocate; greater than zero. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``memory`` - follows standard semantics. - - * **Return fields:** - - ``count`` - actual number of buffers allocated. - - .. warning:: - - The actual number of allocated buffers may differ from the ``count`` - given. The client must check the updated value of ``count`` after the - call returns. - - .. note:: - - To allocate more than the minimum number of buffers (for pipeline - depth), the client may query the ``V4L2_CID_MIN_BUFFERS_FOR_CAPTURE`` - control to get the minimum number of buffers required, and pass the - obtained value plus the number of additional buffers needed in the - ``count`` field to :c:func:`VIDIOC_REQBUFS`. - - Alternatively, :c:func:`VIDIOC_CREATE_BUFS` on the ``CAPTURE`` queue can be - used to have more control over buffer allocation. For example, by - allocating buffers larger than the current ``CAPTURE`` format, future - resolution changes can be accommodated. - - * **Required fields:** - - ``count`` - requested number of buffers to allocate; greater than zero. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``memory`` - follows standard semantics. - - ``format`` - a format representing the maximum framebuffer resolution to be - accommodated by newly allocated buffers. - - * **Return fields:** - - ``count`` - adjusted to the number of allocated buffers. - - .. warning:: - - The actual number of allocated buffers may differ from the ``count`` - given. The client must check the updated value of ``count`` after the - call returns. - - .. note:: - - To allocate buffers for a format different than parsed from the stream - metadata, the client must proceed as follows, before the metadata - parsing is initiated: - - * set width and height of the ``OUTPUT`` format to desired coded resolution to - let the decoder configure the ``CAPTURE`` format appropriately, - - * query the ``CAPTURE`` format using :c:func:`VIDIOC_G_FMT` and save it - until this step. - - The format obtained in the query may be then used with - :c:func:`VIDIOC_CREATE_BUFS` in this step to allocate the buffers. - -11. Call :c:func:`VIDIOC_STREAMON` on the ``CAPTURE`` queue to start decoding - frames. - -Decoding -======== - -This state is reached after the `Capture Setup` sequence finishes successfully. -In this state, the client queues and dequeues buffers to both queues via -:c:func:`VIDIOC_QBUF` and :c:func:`VIDIOC_DQBUF`, following the standard -semantics. - -The content of the source ``OUTPUT`` buffers depends on the active coded pixel -format and may be affected by codec-specific extended controls, as stated in -the documentation of each format. - -Both queues operate independently, following the standard behavior of V4L2 -buffer queues and memory-to-memory devices. In addition, the order of decoded -frames dequeued from the ``CAPTURE`` queue may differ from the order of queuing -coded frames to the ``OUTPUT`` queue, due to properties of the selected coded -format, e.g. frame reordering. - -The client must not assume any direct relationship between ``CAPTURE`` -and ``OUTPUT`` buffers and any specific timing of buffers becoming -available to dequeue. Specifically: - -* a buffer queued to ``OUTPUT`` may result in no buffers being produced - on ``CAPTURE`` (e.g. if it does not contain encoded data, or if only - metadata syntax structures are present in it), - -* a buffer queued to ``OUTPUT`` may result in more than one buffer produced - on ``CAPTURE`` (if the encoded data contained more than one frame, or if - returning a decoded frame allowed the decoder to return a frame that - preceded it in decode, but succeeded it in the display order), - -* a buffer queued to ``OUTPUT`` may result in a buffer being produced on - ``CAPTURE`` later into decode process, and/or after processing further - ``OUTPUT`` buffers, or be returned out of order, e.g. if display - reordering is used, - -* buffers may become available on the ``CAPTURE`` queue without additional - buffers queued to ``OUTPUT`` (e.g. during drain or ``EOS``), because of the - ``OUTPUT`` buffers queued in the past whose decoding results are only - available at later time, due to specifics of the decoding process. - -.. note:: - - To allow matching decoded ``CAPTURE`` buffers with ``OUTPUT`` buffers they - originated from, the client can set the ``timestamp`` field of the - :c:type:`v4l2_buffer` struct when queuing an ``OUTPUT`` buffer. The - ``CAPTURE`` buffer(s), which resulted from decoding that ``OUTPUT`` buffer - will have their ``timestamp`` field set to the same value when dequeued. - - In addition to the straightforward case of one ``OUTPUT`` buffer producing - one ``CAPTURE`` buffer, the following cases are defined: - - * one ``OUTPUT`` buffer generates multiple ``CAPTURE`` buffers: the same - ``OUTPUT`` timestamp will be copied to multiple ``CAPTURE`` buffers. - - * multiple ``OUTPUT`` buffers generate one ``CAPTURE`` buffer: timestamp of - the ``OUTPUT`` buffer queued first will be copied. - - * the decoding order differs from the display order (i.e. the ``CAPTURE`` - buffers are out-of-order compared to the ``OUTPUT`` buffers): ``CAPTURE`` - timestamps will not retain the order of ``OUTPUT`` timestamps. - -During the decoding, the decoder may initiate one of the special sequences, as -listed below. The sequences will result in the decoder returning all the -``CAPTURE`` buffers that originated from all the ``OUTPUT`` buffers processed -before the sequence started. Last of the buffers will have the -``V4L2_BUF_FLAG_LAST`` flag set. To determine the sequence to follow, the client -must check if there is any pending event and: - -* if a ``V4L2_EVENT_SOURCE_CHANGE`` event with ``changes`` set to - ``V4L2_EVENT_SRC_CH_RESOLUTION`` is pending, the `Dynamic Resolution - Change` sequence needs to be followed, - -* if a ``V4L2_EVENT_EOS`` event is pending, the `End of Stream` sequence needs - to be followed. - -Some of the sequences can be intermixed with each other and need to be handled -as they happen. The exact operation is documented for each sequence. - -Should a decoding error occur, it will be reported to the client with the level -of details depending on the decoder capabilities. Specifically: - -* the CAPTURE buffer that contains the results of the failed decode operation - will be returned with the V4L2_BUF_FLAG_ERROR flag set, - -* if the decoder is able to precisely report the OUTPUT buffer that triggered - the error, such buffer will be returned with the V4L2_BUF_FLAG_ERROR flag - set. - -In case of a fatal failure that does not allow the decoding to continue, any -further operations on corresponding decoder file handle will return the -EIO -error code. The client may close the file handle and open a new one, or -alternatively reinitialize the instance by stopping streaming on both queues, -releasing all buffers and performing the Initialization sequence again. - -Seek -==== - -Seek is controlled by the ``OUTPUT`` queue, as it is the source of coded data. -The seek does not require any specific operation on the ``CAPTURE`` queue, but -it may be affected as per normal decoder operation. - -1. Stop the ``OUTPUT`` queue to begin the seek sequence via - :c:func:`VIDIOC_STREAMOFF`. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - * The decoder will drop all the pending ``OUTPUT`` buffers and they must be - treated as returned to the client (following standard semantics). - -2. Restart the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON` - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - * The decoder will start accepting new source bytestream buffers after the - call returns. - -3. Start queuing buffers containing coded data after the seek to the ``OUTPUT`` - queue until a suitable resume point is found. - - .. note:: - - There is no requirement to begin queuing coded data starting exactly - from a resume point (e.g. SPS or a keyframe). Any queued ``OUTPUT`` - buffers will be processed and returned to the client until a suitable - resume point is found. While looking for a resume point, the decoder - should not produce any decoded frames into ``CAPTURE`` buffers. - - Some hardware is known to mishandle seeks to a non-resume point. Such an - operation may result in an unspecified number of corrupted decoded frames - being made available on the ``CAPTURE`` queue. Drivers must ensure that - no fatal decoding errors or crashes occur, and implement any necessary - handling and workarounds for hardware issues related to seek operations. - - .. warning:: - - In case of the H.264/HEVC codec, the client must take care not to seek - over a change of SPS/PPS. Even though the target frame could be a - keyframe, the stale SPS/PPS inside decoder state would lead to undefined - results when decoding. Although the decoder must handle that case without - a crash or a fatal decode error, the client must not expect a sensible - decode output. - - If the hardware can detect such corrupted decoded frames, then - corresponding buffers will be returned to the client with the - V4L2_BUF_FLAG_ERROR set. See the `Decoding` section for further - description of decode error reporting. - -4. After a resume point is found, the decoder will start returning ``CAPTURE`` - buffers containing decoded frames. - -.. important:: - - A seek may result in the `Dynamic Resolution Change` sequence being - initiated, due to the seek target having decoding parameters different from - the part of the stream decoded before the seek. The sequence must be handled - as per normal decoder operation. - -.. warning:: - - It is not specified when the ``CAPTURE`` queue starts producing buffers - containing decoded data from the ``OUTPUT`` buffers queued after the seek, - as it operates independently from the ``OUTPUT`` queue. - - The decoder may return a number of remaining ``CAPTURE`` buffers containing - decoded frames originating from the ``OUTPUT`` buffers queued before the - seek sequence is performed. - - The ``VIDIOC_STREAMOFF`` operation discards any remaining queued - ``OUTPUT`` buffers, which means that not all of the ``OUTPUT`` buffers - queued before the seek sequence may have matching ``CAPTURE`` buffers - produced. For example, given the sequence of operations on the - ``OUTPUT`` queue: - - QBUF(A), QBUF(B), STREAMOFF(), STREAMON(), QBUF(G), QBUF(H), - - any of the following results on the ``CAPTURE`` queue is allowed: - - {A’, B’, G’, H’}, {A’, G’, H’}, {G’, H’}. - - To determine the CAPTURE buffer containing the first decoded frame after the - seek, the client may observe the timestamps to match the CAPTURE and OUTPUT - buffers or use V4L2_DEC_CMD_STOP and V4L2_DEC_CMD_START to drain the - decoder. - -.. note:: - - To achieve instantaneous seek, the client may restart streaming on the - ``CAPTURE`` queue too to discard decoded, but not yet dequeued buffers. - -Dynamic Resolution Change -========================= - -Streams that include resolution metadata in the bytestream may require switching -to a different resolution during the decoding. - -.. note:: - - Not all decoders can detect resolution changes. Those that do set the - ``V4L2_FMT_FLAG_DYN_RESOLUTION`` flag for the coded format when - :c:func:`VIDIOC_ENUM_FMT` is called. - -The sequence starts when the decoder detects a coded frame with one or more of -the following parameters different from those previously established (and -reflected by corresponding queries): - -* coded resolution (``OUTPUT`` width and height), - -* visible resolution (selection rectangles), - -* the minimum number of buffers needed for decoding. - -Whenever that happens, the decoder must proceed as follows: - -1. After encountering a resolution change in the stream, the decoder sends a - ``V4L2_EVENT_SOURCE_CHANGE`` event with ``changes`` set to - ``V4L2_EVENT_SRC_CH_RESOLUTION``. - - .. important:: - - Any client query issued after the decoder queues the event will return - values applying to the stream after the resolution change, including - queue formats, selection rectangles and controls. - -2. The decoder will then process and decode all remaining buffers from before - the resolution change point. - - * The last buffer from before the change must be marked with the - ``V4L2_BUF_FLAG_LAST`` flag, similarly to the `Drain` sequence above. - - .. warning:: - - The last buffer may be empty (with :c:type:`v4l2_buffer` ``bytesused`` - = 0) and in that case it must be ignored by the client, as it does not - contain a decoded frame. - - .. note:: - - Any attempt to dequeue more ``CAPTURE`` buffers beyond the buffer marked - with ``V4L2_BUF_FLAG_LAST`` will result in a -EPIPE error from - :c:func:`VIDIOC_DQBUF`. - -The client must continue the sequence as described below to continue the -decoding process. - -1. Dequeue the source change event. - - .. important:: - - A source change triggers an implicit decoder drain, similar to the - explicit `Drain` sequence. The decoder is stopped after it completes. - The decoding process must be resumed with either a pair of calls to - :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the - ``CAPTURE`` queue, or a call to :c:func:`VIDIOC_DECODER_CMD` with the - ``V4L2_DEC_CMD_START`` command. - -2. Continue with the `Capture Setup` sequence. - -.. note:: - - During the resolution change sequence, the ``OUTPUT`` queue must remain - streaming. Calling :c:func:`VIDIOC_STREAMOFF` on the ``OUTPUT`` queue would - abort the sequence and initiate a seek. - - In principle, the ``OUTPUT`` queue operates separately from the ``CAPTURE`` - queue and this remains true for the duration of the entire resolution change - sequence as well. - - The client should, for best performance and simplicity, keep queuing/dequeuing - buffers to/from the ``OUTPUT`` queue even while processing this sequence. - -Drain -===== - -To ensure that all queued ``OUTPUT`` buffers have been processed and related -``CAPTURE`` buffers are given to the client, the client must follow the drain -sequence described below. After the drain sequence ends, the client has -received all decoded frames for all ``OUTPUT`` buffers queued before the -sequence was started. - -1. Begin drain by issuing :c:func:`VIDIOC_DECODER_CMD`. - - * **Required fields:** - - ``cmd`` - set to ``V4L2_DEC_CMD_STOP``. - - ``flags`` - set to 0. - - ``pts`` - set to 0. - - .. warning:: - - The sequence can be only initiated if both ``OUTPUT`` and ``CAPTURE`` - queues are streaming. For compatibility reasons, the call to - :c:func:`VIDIOC_DECODER_CMD` will not fail even if any of the queues is - not streaming, but at the same time it will not initiate the `Drain` - sequence and so the steps described below would not be applicable. - -2. Any ``OUTPUT`` buffers queued by the client before the - :c:func:`VIDIOC_DECODER_CMD` was issued will be processed and decoded as - normal. The client must continue to handle both queues independently, - similarly to normal decode operation. This includes: - - * handling any operations triggered as a result of processing those buffers, - such as the `Dynamic Resolution Change` sequence, before continuing with - the drain sequence, - - * queuing and dequeuing ``CAPTURE`` buffers, until a buffer marked with the - ``V4L2_BUF_FLAG_LAST`` flag is dequeued, - - .. warning:: - - The last buffer may be empty (with :c:type:`v4l2_buffer` - ``bytesused`` = 0) and in that case it must be ignored by the client, - as it does not contain a decoded frame. - - .. note:: - - Any attempt to dequeue more ``CAPTURE`` buffers beyond the buffer - marked with ``V4L2_BUF_FLAG_LAST`` will result in a -EPIPE error from - :c:func:`VIDIOC_DQBUF`. - - * dequeuing processed ``OUTPUT`` buffers, until all the buffers queued - before the ``V4L2_DEC_CMD_STOP`` command are dequeued, - - * dequeuing the ``V4L2_EVENT_EOS`` event, if the client subscribed to it. - - .. note:: - - For backwards compatibility, the decoder will signal a ``V4L2_EVENT_EOS`` - event when the last frame has been decoded and all frames are ready to be - dequeued. It is a deprecated behavior and the client must not rely on it. - The ``V4L2_BUF_FLAG_LAST`` buffer flag should be used instead. - -3. Once all the ``OUTPUT`` buffers queued before the ``V4L2_DEC_CMD_STOP`` call - are dequeued and the last ``CAPTURE`` buffer is dequeued, the decoder is - stopped and it will accept, but not process, any newly queued ``OUTPUT`` - buffers until the client issues any of the following operations: - - * ``V4L2_DEC_CMD_START`` - the decoder will not be reset and will resume - operation normally, with all the state from before the drain, - - * a pair of :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the - ``CAPTURE`` queue - the decoder will resume the operation normally, - however any ``CAPTURE`` buffers still in the queue will be returned to the - client, - - * a pair of :c:func:`VIDIOC_STREAMOFF` and :c:func:`VIDIOC_STREAMON` on the - ``OUTPUT`` queue - any pending source buffers will be returned to the - client and the `Seek` sequence will be triggered. - -.. note:: - - Once the drain sequence is initiated, the client needs to drive it to - completion, as described by the steps above, unless it aborts the process by - issuing :c:func:`VIDIOC_STREAMOFF` on any of the ``OUTPUT`` or ``CAPTURE`` - queues. The client is not allowed to issue ``V4L2_DEC_CMD_START`` or - ``V4L2_DEC_CMD_STOP`` again while the drain sequence is in progress and they - will fail with -EBUSY error code if attempted. - - Although mandatory, the availability of decoder commands may be queried - using :c:func:`VIDIOC_TRY_DECODER_CMD`. - -End of Stream -============= - -If the decoder encounters an end of stream marking in the stream, the decoder -will initiate the `Drain` sequence, which the client must handle as described -above, skipping the initial :c:func:`VIDIOC_DECODER_CMD`. - -Commit Points -============= - -Setting formats and allocating buffers trigger changes in the behavior of the -decoder. - -1. Setting the format on the ``OUTPUT`` queue may change the set of formats - supported/advertised on the ``CAPTURE`` queue. In particular, it also means - that the ``CAPTURE`` format may be reset and the client must not rely on the - previously set format being preserved. - -2. Enumerating formats on the ``CAPTURE`` queue always returns only formats - supported for the current ``OUTPUT`` format. - -3. Setting the format on the ``CAPTURE`` queue does not change the list of - formats available on the ``OUTPUT`` queue. An attempt to set a ``CAPTURE`` - format that is not supported for the currently selected ``OUTPUT`` format - will result in the decoder adjusting the requested ``CAPTURE`` format to a - supported one. - -4. Enumerating formats on the ``OUTPUT`` queue always returns the full set of - supported coded formats, irrespectively of the current ``CAPTURE`` format. - -5. While buffers are allocated on any of the ``OUTPUT`` or ``CAPTURE`` queues, - the client must not change the format on the ``OUTPUT`` queue. Drivers will - return the -EBUSY error code for any such format change attempt. - -To summarize, setting formats and allocation must always start with the -``OUTPUT`` queue and the ``OUTPUT`` queue is the master that governs the -set of supported formats for the ``CAPTURE`` queue. diff --git a/Documentation/media/uapi/v4l/dev-event.rst b/Documentation/media/uapi/v4l/dev-event.rst deleted file mode 100644 index 6029101fe1d7..000000000000 --- a/Documentation/media/uapi/v4l/dev-event.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _event: - -*************** -Event Interface -*************** - -The V4L2 event interface provides a means for a user to get immediately -notified on certain conditions taking place on a device. This might -include start of frame or loss of signal events, for example. Changes in -the value or state of a V4L2 control can also be reported through -events. - -To receive events, the events the user is interested in first must be -subscribed using the -:ref:`VIDIOC_SUBSCRIBE_EVENT` ioctl. Once -an event is subscribed, the events of subscribed types are dequeueable -using the :ref:`VIDIOC_DQEVENT` ioctl. Events may be -unsubscribed using VIDIOC_UNSUBSCRIBE_EVENT ioctl. The special event -type V4L2_EVENT_ALL may be used to unsubscribe all the events the -driver supports. - -The event subscriptions and event queues are specific to file handles. -Subscribing an event on one file handle does not affect other file -handles. - -The information on dequeueable events is obtained by using select or -poll system calls on video devices. The V4L2 events use POLLPRI events -on poll system call and exceptions on select system call. - -Starting with kernel 3.1 certain guarantees can be given with regards to -events: - -1. Each subscribed event has its own internal dedicated event queue. - This means that flooding of one event type will not interfere with - other event types. - -2. If the internal event queue for a particular subscribed event becomes - full, then the oldest event in that queue will be dropped. - -3. Where applicable, certain event types can ensure that the payload of - the oldest event that is about to be dropped will be merged with the - payload of the next oldest event. Thus ensuring that no information - is lost, but only an intermediate step leading up to that - information. See the documentation for the event you want to - subscribe to whether this is applicable for that event or not. diff --git a/Documentation/media/uapi/v4l/dev-mem2mem.rst b/Documentation/media/uapi/v4l/dev-mem2mem.rst deleted file mode 100644 index 70953958cee6..000000000000 --- a/Documentation/media/uapi/v4l/dev-mem2mem.rst +++ /dev/null @@ -1,49 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _mem2mem: - -******************************** -Video Memory-To-Memory Interface -******************************** - -A V4L2 memory-to-memory device can compress, decompress, transform, or -otherwise convert video data from one format into another format, in memory. -Such memory-to-memory devices set the ``V4L2_CAP_VIDEO_M2M`` or -``V4L2_CAP_VIDEO_M2M_MPLANE`` capability. Examples of memory-to-memory -devices are codecs, scalers, deinterlacers or format converters (i.e. -converting from YUV to RGB). - -A memory-to-memory video node acts just like a normal video node, but it -supports both output (sending frames from memory to the hardware) -and capture (receiving the processed frames from the hardware into -memory) stream I/O. An application will have to setup the stream I/O for -both sides and finally call :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` -for both capture and output to start the hardware. - -Memory-to-memory devices function as a shared resource: you can -open the video node multiple times, each application setting up their -own properties that are local to the file handle, and each can use -it independently from the others. The driver will arbitrate access to -the hardware and reprogram it whenever another file handler gets access. -This is different from the usual video node behavior where the video -properties are global to the device (i.e. changing something through one -file handle is visible through another file handle). - -One of the most common memory-to-memory device is the codec. Codecs -are more complicated than most and require additional setup for -their codec parameters. This is done through codec controls. -See :ref:`mpeg-controls`. More details on how to use codec memory-to-memory -devices are given in the following sections. - -.. toctree:: - :maxdepth: 1 - - dev-decoder - dev-stateless-decoder diff --git a/Documentation/media/uapi/v4l/dev-meta.rst b/Documentation/media/uapi/v4l/dev-meta.rst deleted file mode 100644 index c5dbe882be65..000000000000 --- a/Documentation/media/uapi/v4l/dev-meta.rst +++ /dev/null @@ -1,74 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _metadata: - -****************** -Metadata Interface -****************** - -Metadata refers to any non-image data that supplements video frames with -additional information. This may include statistics computed over the image, -frame capture parameters supplied by the image source or device specific -parameters for specifying how the device processes images. This interface is -intended for transfer of metadata between the userspace and the hardware and -control of that operation. - -The metadata interface is implemented on video device nodes. The device can be -dedicated to metadata or can support both video and metadata as specified in its -reported capabilities. - -Querying Capabilities -===================== - -Device nodes supporting the metadata capture interface set the -``V4L2_CAP_META_CAPTURE`` flag in the ``device_caps`` field of the -:c:type:`v4l2_capability` structure returned by the :c:func:`VIDIOC_QUERYCAP` -ioctl. That flag means the device can capture metadata to memory. Similarly, -device nodes supporting metadata output interface set the -``V4L2_CAP_META_OUTPUT`` flag in the ``device_caps`` field of -:c:type:`v4l2_capability` structure. That flag means the device can read -metadata from memory. - -At least one of the read/write or streaming I/O methods must be supported. - - -Data Format Negotiation -======================= - -The metadata device uses the :ref:`format` ioctls to select the capture format. -The metadata buffer content format is bound to that selected format. In addition -to the basic :ref:`format` ioctls, the :c:func:`VIDIOC_ENUM_FMT` ioctl must be -supported as well. - -To use the :ref:`format` ioctls applications set the ``type`` field of the -:c:type:`v4l2_format` structure to ``V4L2_BUF_TYPE_META_CAPTURE`` or to -``V4L2_BUF_TYPE_META_OUTPUT`` and use the :c:type:`v4l2_meta_format` ``meta`` -member of the ``fmt`` union as needed per the desired operation. Both drivers -and applications must set the remainder of the :c:type:`v4l2_format` structure -to 0. - -.. c:type:: v4l2_meta_format - -.. tabularcolumns:: |p{1.4cm}|p{2.2cm}|p{13.9cm}| - -.. flat-table:: struct v4l2_meta_format - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``dataformat`` - - The data format, set by the application. This is a little endian - :ref:`four character code <v4l2-fourcc>`. V4L2 defines metadata formats - in :ref:`meta-formats`. - * - __u32 - - ``buffersize`` - - Maximum buffer size in bytes required for data. The value is set by the - driver. diff --git a/Documentation/media/uapi/v4l/dev-osd.rst b/Documentation/media/uapi/v4l/dev-osd.rst deleted file mode 100644 index d3ad67da6386..000000000000 --- a/Documentation/media/uapi/v4l/dev-osd.rst +++ /dev/null @@ -1,157 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _osd: - -****************************** -Video Output Overlay Interface -****************************** - -**Also known as On-Screen Display (OSD)** - -Some video output devices can overlay a framebuffer image onto the -outgoing video signal. Applications can set up such an overlay using -this interface, which borrows structures and ioctls of the -:ref:`Video Overlay <overlay>` interface. - -The OSD function is accessible through the same character special file -as the :ref:`Video Output <capture>` function. - -.. note:: - - The default function of such a ``/dev/video`` device is video - capturing or output. The OSD function is only available after calling - the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. - - -Querying Capabilities -===================== - -Devices supporting the *Video Output Overlay* interface set the -``V4L2_CAP_VIDEO_OUTPUT_OVERLAY`` flag in the ``capabilities`` field of -struct :c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. - - -Framebuffer -=========== - -Contrary to the *Video Overlay* interface the framebuffer is normally -implemented on the TV card and not the graphics card. On Linux it is -accessible as a framebuffer device (``/dev/fbN``). Given a V4L2 device, -applications can find the corresponding framebuffer device by calling -the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` ioctl. It returns, amongst -other information, the physical address of the framebuffer in the -``base`` field of struct :c:type:`v4l2_framebuffer`. -The framebuffer device ioctl ``FBIOGET_FSCREENINFO`` returns the same -address in the ``smem_start`` field of struct -struct :c:type:`fb_fix_screeninfo`. The ``FBIOGET_FSCREENINFO`` -ioctl and struct :c:type:`fb_fix_screeninfo` are defined in -the ``linux/fb.h`` header file. - -The width and height of the framebuffer depends on the current video -standard. A V4L2 driver may reject attempts to change the video standard -(or any other ioctl which would imply a framebuffer size change) with an -``EBUSY`` error code until all applications closed the framebuffer device. - -Example: Finding a framebuffer device for OSD ---------------------------------------------- - -.. code-block:: c - - #include <linux/fb.h> - - struct v4l2_framebuffer fbuf; - unsigned int i; - int fb_fd; - - if (-1 == ioctl(fd, VIDIOC_G_FBUF, &fbuf)) { - perror("VIDIOC_G_FBUF"); - exit(EXIT_FAILURE); - } - - for (i = 0; i < 30; i++) { - char dev_name[16]; - struct fb_fix_screeninfo si; - - snprintf(dev_name, sizeof(dev_name), "/dev/fb%u", i); - - fb_fd = open(dev_name, O_RDWR); - if (-1 == fb_fd) { - switch (errno) { - case ENOENT: /* no such file */ - case ENXIO: /* no driver */ - continue; - - default: - perror("open"); - exit(EXIT_FAILURE); - } - } - - if (0 == ioctl(fb_fd, FBIOGET_FSCREENINFO, &si)) { - if (si.smem_start == (unsigned long)fbuf.base) - break; - } else { - /* Apparently not a framebuffer device. */ - } - - close(fb_fd); - fb_fd = -1; - } - - /* fb_fd is the file descriptor of the framebuffer device - for the video output overlay, or -1 if no device was found. */ - - -Overlay Window and Scaling -========================== - -The overlay is controlled by source and target rectangles. The source -rectangle selects a subsection of the framebuffer image to be overlaid, -the target rectangle an area in the outgoing video signal where the -image will appear. Drivers may or may not support scaling, and arbitrary -sizes and positions of these rectangles. Further drivers may support any -(or none) of the clipping/blending methods defined for the -:ref:`Video Overlay <overlay>` interface. - -A struct :c:type:`v4l2_window` defines the size of the -source rectangle, its position in the framebuffer and the -clipping/blending method to be used for the overlay. To get the current -parameters applications set the ``type`` field of a struct -:c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY`` and call the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl. The driver fills the -struct :c:type:`v4l2_window` substructure named ``win``. It is not -possible to retrieve a previously programmed clipping list or bitmap. - -To program the source rectangle applications set the ``type`` field of a -struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY``, initialize the ``win`` -substructure and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. -The driver adjusts the parameters against hardware limits and returns -the actual parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, -the :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl can be used to learn -about driver capabilities without actually changing driver state. Unlike -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` this also works after the overlay has been enabled. - -A struct :c:type:`v4l2_crop` defines the size and position -of the target rectangle. The scaling factor of the overlay is implied by -the width and height given in struct :c:type:`v4l2_window` -and struct :c:type:`v4l2_crop`. The cropping API applies to -*Video Output* and *Video Output Overlay* devices in the same way as to -*Video Capture* and *Video Overlay* devices, merely reversing the -direction of the data flow. For more information see :ref:`crop`. - - -Enabling Overlay -================ - -There is no V4L2 ioctl to enable or disable the overlay, however the -framebuffer interface of the driver may support the ``FBIOBLANK`` ioctl. diff --git a/Documentation/media/uapi/v4l/dev-output.rst b/Documentation/media/uapi/v4l/dev-output.rst deleted file mode 100644 index 3fe1b39696ed..000000000000 --- a/Documentation/media/uapi/v4l/dev-output.rst +++ /dev/null @@ -1,108 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _output: - -********************** -Video Output Interface -********************** - -Video output devices encode stills or image sequences as analog video -signal. With this interface applications can control the encoding -process and move images from user space to the driver. - -Conventionally V4L2 video output devices are accessed through character -device special files named ``/dev/video`` and ``/dev/video0`` to -``/dev/video63`` with major number 81 and minor numbers 0 to 63. -``/dev/video`` is typically a symbolic link to the preferred video -device. - -.. note:: The same device file names are used also for video capture devices. - - -Querying Capabilities -===================== - -Devices supporting the video output interface set the -``V4L2_CAP_VIDEO_OUTPUT`` or ``V4L2_CAP_VIDEO_OUTPUT_MPLANE`` flag in -the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. As secondary device -functions they may also support the :ref:`raw VBI output <raw-vbi>` -(``V4L2_CAP_VBI_OUTPUT``) interface. At least one of the read/write or -streaming I/O methods must be supported. Modulators and audio outputs -are optional. - - -Supplemental Functions -====================== - -Video output devices shall support :ref:`audio output <audio>`, -:ref:`modulator <tuner>`, :ref:`controls <control>`, -:ref:`cropping and scaling <crop>` and -:ref:`streaming parameter <streaming-par>` ioctls as needed. The -:ref:`video output <video>` ioctls must be supported by all video -output devices. - - -Image Format Negotiation -======================== - -The output is determined by cropping and image format parameters. The -former select an area of the video picture where the image will appear, -the latter how images are stored in memory, i. e. in RGB or YUV format, -the number of bits per pixel or width and height. Together they also -define how images are scaled in the process. - -As usual these parameters are *not* reset at :ref:`open() <func-open>` -time to permit Unix tool chains, programming a device and then writing -to it as if it was a plain file. Well written V4L2 applications ensure -they really get what they want, including cropping and scaling. - -Cropping initialization at minimum requires to reset the parameters to -defaults. An example is given in :ref:`crop`. - -To query the current image format applications set the ``type`` field of -a struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VIDEO_OUTPUT`` or ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`` -and call the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer -to this structure. Drivers fill the struct -:c:type:`v4l2_pix_format` ``pix`` or the struct -:c:type:`v4l2_pix_format_mplane` ``pix_mp`` -member of the ``fmt`` union. - -To request different parameters applications set the ``type`` field of a -struct :c:type:`v4l2_format` as above and initialize all -fields of the struct :c:type:`v4l2_pix_format` -``vbi`` member of the ``fmt`` union, or better just modify the results -of :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -ioctl with a pointer to this structure. Drivers may adjust the -parameters and finally return the actual parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` -does. - -Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` the :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl -can be used to learn about hardware limitations without disabling I/O or -possibly time consuming hardware preparations. - -The contents of struct :c:type:`v4l2_pix_format` and -struct :c:type:`v4l2_pix_format_mplane` are -discussed in :ref:`pixfmt`. See also the specification of the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctls for -details. Video output devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` -and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, even if :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ignores all -requests and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is optional. - - -Writing Images -============== - -A video output device may support the :ref:`write() function <rw>` -and/or streaming (:ref:`memory mapping <mmap>` or -:ref:`user pointer <userp>`) I/O. See :ref:`io` for details. diff --git a/Documentation/media/uapi/v4l/dev-overlay.rst b/Documentation/media/uapi/v4l/dev-overlay.rst deleted file mode 100644 index b91b3837d4e7..000000000000 --- a/Documentation/media/uapi/v4l/dev-overlay.rst +++ /dev/null @@ -1,328 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _overlay: - -*********************** -Video Overlay Interface -*********************** - -**Also known as Framebuffer Overlay or Previewing.** - -Video overlay devices have the ability to genlock (TV-)video into the -(VGA-)video signal of a graphics card, or to store captured images -directly in video memory of a graphics card, typically with clipping. -This can be considerable more efficient than capturing images and -displaying them by other means. In the old days when only nuclear power -plants needed cooling towers this used to be the only way to put live -video into a window. - -Video overlay devices are accessed through the same character special -files as :ref:`video capture <capture>` devices. - -.. note:: - - The default function of a ``/dev/video`` device is video - capturing. The overlay function is only available after calling - the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. - -The driver may support simultaneous overlay and capturing using the -read/write and streaming I/O methods. If so, operation at the nominal -frame rate of the video standard is not guaranteed. Frames may be -directed away from overlay to capture, or one field may be used for -overlay and the other for capture if the capture parameters permit this. - -Applications should use different file descriptors for capturing and -overlay. This must be supported by all drivers capable of simultaneous -capturing and overlay. Optionally these drivers may also permit -capturing and overlay with a single file descriptor for compatibility -with V4L and earlier versions of V4L2. [#f1]_ - - -Querying Capabilities -===================== - -Devices supporting the video overlay interface set the -``V4L2_CAP_VIDEO_OVERLAY`` flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. The overlay I/O -method specified below must be supported. Tuners and audio inputs are -optional. - - -Supplemental Functions -====================== - -Video overlay devices shall support :ref:`audio input <audio>`, -:ref:`tuner`, :ref:`controls <control>`, -:ref:`cropping and scaling <crop>` and -:ref:`streaming parameter <streaming-par>` ioctls as needed. The -:ref:`video input <video>` and :ref:`video standard <standard>` -ioctls must be supported by all video overlay devices. - - -Setup -===== - -Before overlay can commence applications must program the driver with -frame buffer parameters, namely the address and size of the frame buffer -and the image format, for example RGB 5:6:5. The -:ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and -:ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctls are available to get and -set these parameters, respectively. The :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl is -privileged because it allows to set up DMA into physical memory, -bypassing the memory protection mechanisms of the kernel. Only the -superuser can change the frame buffer address and size. Users are not -supposed to run TV applications as root or with SUID bit set. A small -helper application with suitable privileges should query the graphics -system and program the V4L2 driver at the appropriate time. - -Some devices add the video overlay to the output signal of the graphics -card. In this case the frame buffer is not modified by the video device, -and the frame buffer address and pixel format are not needed by the -driver. The :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl is not privileged. An application -can check for this type of device by calling the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` -ioctl. - -A driver may support any (or none) of five clipping/blending methods: - -1. Chroma-keying displays the overlaid image only where pixels in the - primary graphics surface assume a certain color. - -2. A bitmap can be specified where each bit corresponds to a pixel in - the overlaid image. When the bit is set, the corresponding video - pixel is displayed, otherwise a pixel of the graphics surface. - -3. A list of clipping rectangles can be specified. In these regions *no* - video is displayed, so the graphics surface can be seen here. - -4. The framebuffer has an alpha channel that can be used to clip or - blend the framebuffer with the video. - -5. A global alpha value can be specified to blend the framebuffer - contents with video images. - -When simultaneous capturing and overlay is supported and the hardware -prohibits different image and frame buffer formats, the format requested -first takes precedence. The attempt to capture -(:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) or overlay -(:ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`) may fail with an ``EBUSY`` error -code or return accordingly modified parameters.. - - -Overlay Window -============== - -The overlaid image is determined by cropping and overlay window -parameters. The former select an area of the video picture to capture, -the latter how images are overlaid and clipped. Cropping initialization -at minimum requires to reset the parameters to defaults. An example is -given in :ref:`crop`. - -The overlay window is described by a struct -:c:type:`v4l2_window`. It defines the size of the image, -its position over the graphics surface and the clipping to be applied. -To get the current parameters applications set the ``type`` field of a -struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VIDEO_OVERLAY`` and call the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl. The driver fills the -struct :c:type:`v4l2_window` substructure named ``win``. It is not -possible to retrieve a previously programmed clipping list or bitmap. - -To program the overlay window applications set the ``type`` field of a -struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VIDEO_OVERLAY``, initialize the ``win`` substructure and -call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. The driver -adjusts the parameters against hardware limits and returns the actual -parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. Like :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, the -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl can be used to learn -about driver capabilities without actually changing driver state. Unlike -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` this also works after the overlay has been enabled. - -The scaling factor of the overlaid image is implied by the width and -height given in struct :c:type:`v4l2_window` and the size -of the cropping rectangle. For more information see :ref:`crop`. - -When simultaneous capturing and overlay is supported and the hardware -prohibits different image and window sizes, the size requested first -takes precedence. The attempt to capture or overlay as well -(:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) may fail with an ``EBUSY`` error -code or return accordingly modified parameters. - - -.. c:type:: v4l2_window - -struct v4l2_window ------------------- - -``struct v4l2_rect w`` - Size and position of the window relative to the top, left corner of - the frame buffer defined with - :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`. The window can extend the - frame buffer width and height, the ``x`` and ``y`` coordinates can - be negative, and it can lie completely outside the frame buffer. The - driver clips the window accordingly, or if that is not possible, - modifies its size and/or position. - -``enum v4l2_field field`` - Applications set this field to determine which video field shall be - overlaid, typically one of ``V4L2_FIELD_ANY`` (0), - ``V4L2_FIELD_TOP``, ``V4L2_FIELD_BOTTOM`` or - ``V4L2_FIELD_INTERLACED``. Drivers may have to choose a different - field order and return the actual setting here. - -``__u32 chromakey`` - When chroma-keying has been negotiated with - :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` applications set this field - to the desired pixel value for the chroma key. The format is the - same as the pixel format of the framebuffer (struct - :c:type:`v4l2_framebuffer` ``fmt.pixelformat`` - field), with bytes in host order. E. g. for - :ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR32>` the value should - be 0xRRGGBB on a little endian, 0xBBGGRR on a big endian host. - -``struct v4l2_clip * clips`` - When chroma-keying has *not* been negotiated and - :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` indicated this capability, - applications can set this field to point to an array of clipping - rectangles. - - Like the window coordinates w, clipping rectangles are defined - relative to the top, left corner of the frame buffer. However - clipping rectangles must not extend the frame buffer width and - height, and they must not overlap. If possible applications - should merge adjacent rectangles. Whether this must create - x-y or y-x bands, or the order of rectangles, is not defined. When - clip lists are not supported the driver ignores this field. Its - contents after calling :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` - are undefined. - -``__u32 clipcount`` - When the application set the ``clips`` field, this field must - contain the number of clipping rectangles in the list. When clip - lists are not supported the driver ignores this field, its contents - after calling :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` are undefined. When clip lists are - supported but no clipping is desired this field must be set to zero. - -``void * bitmap`` - When chroma-keying has *not* been negotiated and - :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` indicated this capability, - applications can set this field to point to a clipping bit mask. - -It must be of the same size as the window, ``w.width`` and ``w.height``. -Each bit corresponds to a pixel in the overlaid image, which is -displayed only when the bit is *set*. Pixel coordinates translate to -bits like: - - -.. code-block:: c - - ((__u8 *) bitmap)[w.width * y + x / 8] & (1 << (x & 7)) - -where ``0`` ≤ x < ``w.width`` and ``0`` ≤ y <``w.height``. [#f2]_ - -When a clipping bit mask is not supported the driver ignores this field, -its contents after calling :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` are -undefined. When a bit mask is supported but no clipping is desired this -field must be set to ``NULL``. - -Applications need not create a clip list or bit mask. When they pass -both, or despite negotiating chroma-keying, the results are undefined. -Regardless of the chosen method, the clipping abilities of the hardware -may be limited in quantity or quality. The results when these limits are -exceeded are undefined. [#f3]_ - -``__u8 global_alpha`` - The global alpha value used to blend the framebuffer with video - images, if global alpha blending has been negotiated - (``V4L2_FBUF_FLAG_GLOBAL_ALPHA``, see - :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`, - :ref:`framebuffer-flags`). - -.. note:: - - This field was added in Linux 2.6.23, extending the - structure. However the :ref:`VIDIOC_[G|S|TRY]_FMT <VIDIOC_G_FMT>` - ioctls, which take a pointer to a :c:type:`v4l2_format` - parent structure with padding bytes at the end, are not affected. - - -.. c:type:: v4l2_clip - -struct v4l2_clip [#f4]_ ------------------------ - -``struct v4l2_rect c`` - Coordinates of the clipping rectangle, relative to the top, left - corner of the frame buffer. Only window pixels *outside* all - clipping rectangles are displayed. - -``struct v4l2_clip * next`` - Pointer to the next clipping rectangle, ``NULL`` when this is the last - rectangle. Drivers ignore this field, it cannot be used to pass a - linked list of clipping rectangles. - - -.. c:type:: v4l2_rect - -struct v4l2_rect ----------------- - -``__s32 left`` - Horizontal offset of the top, left corner of the rectangle, in - pixels. - -``__s32 top`` - Vertical offset of the top, left corner of the rectangle, in pixels. - Offsets increase to the right and down. - -``__u32 width`` - Width of the rectangle, in pixels. - -``__u32 height`` - Height of the rectangle, in pixels. - - -Enabling Overlay -================ - -To start or stop the frame buffer overlay applications call the -:ref:`VIDIOC_OVERLAY` ioctl. - -.. [#f1] - A common application of two file descriptors is the XFree86 - :ref:`Xv/V4L <xvideo>` interface driver and a V4L2 application. - While the X server controls video overlay, the application can take - advantage of memory mapping and DMA. - - In the opinion of the designers of this API, no driver writer taking - the efforts to support simultaneous capturing and overlay will - restrict this ability by requiring a single file descriptor, as in - V4L and earlier versions of V4L2. Making this optional means - applications depending on two file descriptors need backup routines - to be compatible with all drivers, which is considerable more work - than using two fds in applications which do not. Also two fd's fit - the general concept of one file descriptor for each logical stream. - Hence as a complexity trade-off drivers *must* support two file - descriptors and *may* support single fd operation. - -.. [#f2] - Should we require ``w.width`` to be a multiple of eight? - -.. [#f3] - When the image is written into frame buffer memory it will be - undesirable if the driver clips out less pixels than expected, - because the application and graphics system are not aware these - regions need to be refreshed. The driver should clip out more pixels - or not write the image at all. - -.. [#f4] - The X Window system defines "regions" which are vectors of ``struct - BoxRec { short x1, y1, x2, y2; }`` with ``width = x2 - x1`` and - ``height = y2 - y1``, so one cannot pass X11 clip lists directly. diff --git a/Documentation/media/uapi/v4l/dev-radio.rst b/Documentation/media/uapi/v4l/dev-radio.rst deleted file mode 100644 index 133eb0e788c2..000000000000 --- a/Documentation/media/uapi/v4l/dev-radio.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _radio: - -*************** -Radio Interface -*************** - -This interface is intended for AM and FM (analog) radio receivers and -transmitters. - -Conventionally V4L2 radio devices are accessed through character device -special files named ``/dev/radio`` and ``/dev/radio0`` to -``/dev/radio63`` with major number 81 and minor numbers 64 to 127. - - -Querying Capabilities -===================== - -Devices supporting the radio interface set the ``V4L2_CAP_RADIO`` and -``V4L2_CAP_TUNER`` or ``V4L2_CAP_MODULATOR`` flag in the -``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. Other combinations of -capability flags are reserved for future extensions. - - -Supplemental Functions -====================== - -Radio devices can support :ref:`controls <control>`, and must support -the :ref:`tuner or modulator <tuner>` ioctls. - -They do not support the video input or output, audio input or output, -video standard, cropping and scaling, compression and streaming -parameter, or overlay ioctls. All other ioctls and I/O methods are -reserved for future extensions. - - -Programming -=========== - -Radio devices may have a couple audio controls (as discussed in -:ref:`control`) such as a volume control, possibly custom controls. -Further all radio devices have one tuner or modulator (these are -discussed in :ref:`tuner`) with index number zero to select the radio -frequency and to determine if a monaural or FM stereo program is -received/emitted. Drivers switch automatically between AM and FM -depending on the selected frequency. The -:ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` or -:ref:`VIDIOC_G_MODULATOR <VIDIOC_G_MODULATOR>` ioctl reports the -supported frequency range. diff --git a/Documentation/media/uapi/v4l/dev-raw-vbi.rst b/Documentation/media/uapi/v4l/dev-raw-vbi.rst deleted file mode 100644 index e06b03ca2ab2..000000000000 --- a/Documentation/media/uapi/v4l/dev-raw-vbi.rst +++ /dev/null @@ -1,306 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _raw-vbi: - -********************** -Raw VBI Data Interface -********************** - -VBI is an abbreviation of Vertical Blanking Interval, a gap in the -sequence of lines of an analog video signal. During VBI no picture -information is transmitted, allowing some time while the electron beam -of a cathode ray tube TV returns to the top of the screen. Using an -oscilloscope you will find here the vertical synchronization pulses and -short data packages ASK modulated [#f1]_ onto the video signal. These are -transmissions of services such as Teletext or Closed Caption. - -Subject of this interface type is raw VBI data, as sampled off a video -signal, or to be added to a signal for output. The data format is -similar to uncompressed video images, a number of lines times a number -of samples per line, we call this a VBI image. - -Conventionally V4L2 VBI devices are accessed through character device -special files named ``/dev/vbi`` and ``/dev/vbi0`` to ``/dev/vbi31`` -with major number 81 and minor numbers 224 to 255. ``/dev/vbi`` is -typically a symbolic link to the preferred VBI device. This convention -applies to both input and output devices. - -To address the problems of finding related video and VBI devices VBI -capturing and output is also available as device function under -``/dev/video``. To capture or output raw VBI data with these devices -applications must call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. -Accessed as ``/dev/vbi``, raw VBI capturing or output is the default -device function. - - -Querying Capabilities -===================== - -Devices supporting the raw VBI capturing or output API set the -``V4L2_CAP_VBI_CAPTURE`` or ``V4L2_CAP_VBI_OUTPUT`` flags, respectively, -in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. At least one of the -read/write, streaming or asynchronous I/O methods must be supported. VBI -devices may or may not have a tuner or modulator. - - -Supplemental Functions -====================== - -VBI devices shall support :ref:`video input or output <video>`, -:ref:`tuner or modulator <tuner>`, and :ref:`controls <control>` -ioctls as needed. The :ref:`video standard <standard>` ioctls provide -information vital to program a VBI device, therefore must be supported. - - -Raw VBI Format Negotiation -========================== - -Raw VBI sampling abilities can vary, in particular the sampling -frequency. To properly interpret the data V4L2 specifies an ioctl to -query the sampling parameters. Moreover, to allow for some flexibility -applications can also suggest different parameters. - -As usual these parameters are *not* reset at :ref:`open() <func-open>` -time to permit Unix tool chains, programming a device and then reading -from it as if it was a plain file. Well written V4L2 applications should -always ensure they really get what they want, requesting reasonable -parameters and then checking if the actual parameters are suitable. - -To query the current raw VBI capture parameters applications set the -``type`` field of a struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_VBI_CAPTURE`` or ``V4L2_BUF_TYPE_VBI_OUTPUT``, and call -the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer to this -structure. Drivers fill the struct -:c:type:`v4l2_vbi_format` ``vbi`` member of the -``fmt`` union. - -To request different parameters applications set the ``type`` field of a -struct :c:type:`v4l2_format` as above and initialize all -fields of the struct :c:type:`v4l2_vbi_format` -``vbi`` member of the ``fmt`` union, or better just modify the results -of :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, and call the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -ioctl with a pointer to this structure. Drivers return an ``EINVAL`` error -code only when the given parameters are ambiguous, otherwise they modify -the parameters according to the hardware capabilities and return the -actual parameters. When the driver allocates resources at this point, it -may return an ``EBUSY`` error code to indicate the returned parameters are -valid but the required resources are currently not available. That may -happen for instance when the video and VBI areas to capture would -overlap, or when the driver supports multiple opens and another process -already requested VBI capturing or output. Anyway, applications must -expect other resource allocation points which may return ``EBUSY``, at the -:ref:`VIDIOC_STREAMON` ioctl and the first :ref:`read() <func-read>` -, :ref:`write() <func-write>` and :ref:`select() <func-select>` calls. - -VBI devices must implement both the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, even if :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ignores all requests -and always returns default parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is optional. - -.. tabularcolumns:: |p{1.6cm}|p{4.2cm}|p{11.7cm}| - -.. c:type:: v4l2_vbi_format - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_vbi_format - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``sampling_rate`` - - Samples per second, i. e. unit 1 Hz. - * - __u32 - - ``offset`` - - Horizontal offset of the VBI image, relative to the leading edge - of the line synchronization pulse and counted in samples: The - first sample in the VBI image will be located ``offset`` / - ``sampling_rate`` seconds following the leading edge. See also - :ref:`vbi-hsync`. - * - __u32 - - ``samples_per_line`` - - - * - __u32 - - ``sample_format`` - - Defines the sample format as in :ref:`pixfmt`, a - four-character-code. [#f2]_ Usually this is ``V4L2_PIX_FMT_GREY``, - i. e. each sample consists of 8 bits with lower values oriented - towards the black level. Do not assume any other correlation of - values with the signal level. For example, the MSB does not - necessarily indicate if the signal is 'high' or 'low' because 128 - may not be the mean value of the signal. Drivers shall not convert - the sample format by software. - * - __u32 - - ``start``\ [#f2]_ - - This is the scanning system line number associated with the first - line of the VBI image, of the first and the second field - respectively. See :ref:`vbi-525` and :ref:`vbi-625` for valid - values. The ``V4L2_VBI_ITU_525_F1_START``, - ``V4L2_VBI_ITU_525_F2_START``, ``V4L2_VBI_ITU_625_F1_START`` and - ``V4L2_VBI_ITU_625_F2_START`` defines give the start line numbers - for each field for each 525 or 625 line format as a convenience. - Don't forget that ITU line numbering starts at 1, not 0. VBI input - drivers can return start values 0 if the hardware cannot reliable - identify scanning lines, VBI acquisition may not require this - information. - * - __u32 - - ``count``\ [#f2]_ - - The number of lines in the first and second field image, - respectively. - * - :cspan:`2` - - Drivers should be as flexibility as possible. For example, it may - be possible to extend or move the VBI capture window down to the - picture area, implementing a 'full field mode' to capture data - service transmissions embedded in the picture. - - An application can set the first or second ``count`` value to zero - if no data is required from the respective field; ``count``\ [1] - if the scanning system is progressive, i. e. not interlaced. The - corresponding start value shall be ignored by the application and - driver. Anyway, drivers may not support single field capturing and - return both count values non-zero. - - Both ``count`` values set to zero, or line numbers are outside the - bounds depicted\ [#f4]_, or a field image covering lines of two - fields, are invalid and shall not be returned by the driver. - - To initialize the ``start`` and ``count`` fields, applications - must first determine the current video standard selection. The - :ref:`v4l2_std_id <v4l2-std-id>` or the ``framelines`` field - of struct :c:type:`v4l2_standard` can be evaluated - for this purpose. - * - __u32 - - ``flags`` - - See :ref:`vbifmt-flags` below. Currently only drivers set flags, - applications must set this field to zero. - * - __u32 - - ``reserved``\ [#f2]_ - - This array is reserved for future extensions. Drivers and - applications must set it to zero. - - -.. tabularcolumns:: |p{4.4cm}|p{1.5cm}|p{11.6cm}| - -.. _vbifmt-flags: - -.. flat-table:: Raw VBI Format Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_VBI_UNSYNC`` - - 0x0001 - - This flag indicates hardware which does not properly distinguish - between fields. Normally the VBI image stores the first field - (lower scanning line numbers) first in memory. This may be a top - or bottom field depending on the video standard. When this flag is - set the first or second field may be stored first, however the - fields are still in correct temporal order with the older field - first in memory. [#f3]_ - * - ``V4L2_VBI_INTERLACED`` - - 0x0002 - - By default the two field images will be passed sequentially; all - lines of the first field followed by all lines of the second field - (compare :ref:`field-order` ``V4L2_FIELD_SEQ_TB`` and - ``V4L2_FIELD_SEQ_BT``, whether the top or bottom field is first in - memory depends on the video standard). When this flag is set, the - two fields are interlaced (cf. ``V4L2_FIELD_INTERLACED``). The - first line of the first field followed by the first line of the - second field, then the two second lines, and so on. Such a layout - may be necessary when the hardware has been programmed to capture - or output interlaced video images and is unable to separate the - fields for VBI capturing at the same time. For simplicity setting - this flag implies that both ``count`` values are equal and - non-zero. - - - -.. _vbi-hsync: - -.. kernel-figure:: vbi_hsync.svg - :alt: vbi_hsync.svg - :align: center - - **Figure 4.1. Line synchronization** - - -.. _vbi-525: - -.. kernel-figure:: vbi_525.svg - :alt: vbi_525.svg - :align: center - - **Figure 4.2. ITU-R 525 line numbering (M/NTSC and M/PAL)** - -.. _vbi-625: - -.. kernel-figure:: vbi_625.svg - :alt: vbi_625.svg - :align: center - - **Figure 4.3. ITU-R 625 line numbering** - -Remember the VBI image format depends on the selected video standard, -therefore the application must choose a new standard or query the -current standard first. Attempts to read or write data ahead of format -negotiation, or after switching the video standard which may invalidate -the negotiated VBI parameters, should be refused by the driver. A format -change during active I/O is not permitted. - - -Reading and writing VBI images -============================== - -To assure synchronization with the field number and easier -implementation, the smallest unit of data passed at a time is one frame, -consisting of two fields of VBI images immediately following in memory. - -The total size of a frame computes as follows: - - -.. code-block:: c - - (count[0] + count[1]) * samples_per_line * sample size in bytes - -The sample size is most likely always one byte, applications must check -the ``sample_format`` field though, to function properly with other -drivers. - -A VBI device may support :ref:`read/write <rw>` and/or streaming -(:ref:`memory mapping <mmap>` or :ref:`user pointer <userp>`) I/O. -The latter bears the possibility of synchronizing video and VBI data by -using buffer timestamps. - -Remember the :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` ioctl and the -first :ref:`read() <func-read>`, :ref:`write() <func-write>` and -:ref:`select() <func-select>` call can be resource allocation -points returning an ``EBUSY`` error code if the required hardware resources -are temporarily unavailable, for example the device is already in use by -another process. - -.. [#f1] - ASK: Amplitude-Shift Keying. A high signal level represents a '1' - bit, a low level a '0' bit. - -.. [#f2] - A few devices may be unable to sample VBI data at all but can extend - the video capture window to the VBI region. - -.. [#f3] - Most VBI services transmit on both fields, but some have different - semantics depending on the field number. These cannot be reliable - decoded or encoded when ``V4L2_VBI_UNSYNC`` is set. - -.. [#f4] - The valid values ar shown at :ref:`vbi-525` and :ref:`vbi-625`. diff --git a/Documentation/media/uapi/v4l/dev-rds.rst b/Documentation/media/uapi/v4l/dev-rds.rst deleted file mode 100644 index 64a724ef58f5..000000000000 --- a/Documentation/media/uapi/v4l/dev-rds.rst +++ /dev/null @@ -1,191 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _rds: - -************* -RDS Interface -************* - -The Radio Data System transmits supplementary information in binary -format, for example the station name or travel information, on an -inaudible audio subcarrier of a radio program. This interface is aimed -at devices capable of receiving and/or transmitting RDS information. - -For more information see the core RDS standard :ref:`iec62106` and the -RBDS standard :ref:`nrsc4`. - -.. note:: - - Note that the RBDS standard as is used in the USA is almost - identical to the RDS standard. Any RDS decoder/encoder can also handle - RBDS. Only some of the fields have slightly different meanings. See the - RBDS standard for more information. - -The RBDS standard also specifies support for MMBS (Modified Mobile -Search). This is a proprietary format which seems to be discontinued. -The RDS interface does not support this format. Should support for MMBS -(or the so-called 'E blocks' in general) be needed, then please contact -the linux-media mailing list: -`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__. - - -Querying Capabilities -===================== - -Devices supporting the RDS capturing API set the -``V4L2_CAP_RDS_CAPTURE`` flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. Any tuner that -supports RDS will set the ``V4L2_TUNER_CAP_RDS`` flag in the -``capability`` field of struct :c:type:`v4l2_tuner`. If the -driver only passes RDS blocks without interpreting the data the -``V4L2_TUNER_CAP_RDS_BLOCK_IO`` flag has to be set, see -:ref:`Reading RDS data <reading-rds-data>`. For future use the flag -``V4L2_TUNER_CAP_RDS_CONTROLS`` has also been defined. However, a driver -for a radio tuner with this capability does not yet exist, so if you are -planning to write such a driver you should discuss this on the -linux-media mailing list: -`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__. - -Whether an RDS signal is present can be detected by looking at the -``rxsubchans`` field of struct :c:type:`v4l2_tuner`: the -``V4L2_TUNER_SUB_RDS`` will be set if RDS data was detected. - -Devices supporting the RDS output API set the ``V4L2_CAP_RDS_OUTPUT`` -flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. Any modulator that -supports RDS will set the ``V4L2_TUNER_CAP_RDS`` flag in the -``capability`` field of struct -:c:type:`v4l2_modulator`. In order to enable the RDS -transmission one must set the ``V4L2_TUNER_SUB_RDS`` bit in the -``txsubchans`` field of struct -:c:type:`v4l2_modulator`. If the driver only passes RDS -blocks without interpreting the data the ``V4L2_TUNER_CAP_RDS_BLOCK_IO`` -flag has to be set. If the tuner is capable of handling RDS entities -like program identification codes and radio text, the flag -``V4L2_TUNER_CAP_RDS_CONTROLS`` should be set, see -:ref:`Writing RDS data <writing-rds-data>` and -:ref:`FM Transmitter Control Reference <fm-tx-controls>`. - - -.. _reading-rds-data: - -Reading RDS data -================ - -RDS data can be read from the radio device with the -:ref:`read() <func-read>` function. The data is packed in groups of -three bytes. - - -.. _writing-rds-data: - -Writing RDS data -================ - -RDS data can be written to the radio device with the -:ref:`write() <func-write>` function. The data is packed in groups of -three bytes, as follows: - - -RDS datastructures -================== - - -.. c:type:: v4l2_rds_data - -.. tabularcolumns:: |p{2.5cm}|p{2.5cm}|p{12.5cm}| - -.. flat-table:: struct v4l2_rds_data - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 5 - - * - __u8 - - ``lsb`` - - Least Significant Byte of RDS Block - * - __u8 - - ``msb`` - - Most Significant Byte of RDS Block - * - __u8 - - ``block`` - - Block description - - - -.. _v4l2-rds-block: - -.. tabularcolumns:: |p{2.9cm}|p{14.6cm}| - -.. flat-table:: Block description - :header-rows: 0 - :stub-columns: 0 - :widths: 1 5 - - * - Bits 0-2 - - Block (aka offset) of the received data. - * - Bits 3-5 - - Deprecated. Currently identical to bits 0-2. Do not use these - bits. - * - Bit 6 - - Corrected bit. Indicates that an error was corrected for this data - block. - * - Bit 7 - - Error bit. Indicates that an uncorrectable error occurred during - reception of this block. - - - -.. _v4l2-rds-block-codes: - -.. tabularcolumns:: |p{6.4cm}|p{2.0cm}|p{1.2cm}|p{7.9cm}| - -.. flat-table:: Block defines - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 1 5 - - * - V4L2_RDS_BLOCK_MSK - - - - 7 - - Mask for bits 0-2 to get the block ID. - * - V4L2_RDS_BLOCK_A - - - - 0 - - Block A. - * - V4L2_RDS_BLOCK_B - - - - 1 - - Block B. - * - V4L2_RDS_BLOCK_C - - - - 2 - - Block C. - * - V4L2_RDS_BLOCK_D - - - - 3 - - Block D. - * - V4L2_RDS_BLOCK_C_ALT - - - - 4 - - Block C'. - * - V4L2_RDS_BLOCK_INVALID - - read-only - - 7 - - An invalid block. - * - V4L2_RDS_BLOCK_CORRECTED - - read-only - - 0x40 - - A bit error was detected but corrected. - * - V4L2_RDS_BLOCK_ERROR - - read-only - - 0x80 - - An uncorrectable error occurred. diff --git a/Documentation/media/uapi/v4l/dev-sdr.rst b/Documentation/media/uapi/v4l/dev-sdr.rst deleted file mode 100644 index 75595c58cb5b..000000000000 --- a/Documentation/media/uapi/v4l/dev-sdr.rst +++ /dev/null @@ -1,114 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _sdr: - -************************************** -Software Defined Radio Interface (SDR) -************************************** - -SDR is an abbreviation of Software Defined Radio, the radio device which -uses application software for modulation or demodulation. This interface -is intended for controlling and data streaming of such devices. - -SDR devices are accessed through character device special files named -``/dev/swradio0`` to ``/dev/swradio255`` with major number 81 and -dynamically allocated minor numbers 0 to 255. - - -Querying Capabilities -===================== - -Devices supporting the SDR receiver interface set the -``V4L2_CAP_SDR_CAPTURE`` and ``V4L2_CAP_TUNER`` flag in the -``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. That flag means the -device has an Analog to Digital Converter (ADC), which is a mandatory -element for the SDR receiver. - -Devices supporting the SDR transmitter interface set the -``V4L2_CAP_SDR_OUTPUT`` and ``V4L2_CAP_MODULATOR`` flag in the -``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. That flag means the -device has an Digital to Analog Converter (DAC), which is a mandatory -element for the SDR transmitter. - -At least one of the read/write, streaming or asynchronous I/O methods -must be supported. - - -Supplemental Functions -====================== - -SDR devices can support :ref:`controls <control>`, and must support -the :ref:`tuner` ioctls. Tuner ioctls are used for setting the -ADC/DAC sampling rate (sampling frequency) and the possible radio -frequency (RF). - -The ``V4L2_TUNER_SDR`` tuner type is used for setting SDR device ADC/DAC -frequency, and the ``V4L2_TUNER_RF`` tuner type is used for setting -radio frequency. The tuner index of the RF tuner (if any) must always -follow the SDR tuner index. Normally the SDR tuner is #0 and the RF -tuner is #1. - -The :ref:`VIDIOC_S_HW_FREQ_SEEK` ioctl is -not supported. - - -Data Format Negotiation -======================= - -The SDR device uses the :ref:`format` ioctls to select the -capture and output format. Both the sampling resolution and the data -streaming format are bound to that selectable format. In addition to the -basic :ref:`format` ioctls, the -:ref:`VIDIOC_ENUM_FMT` ioctl must be supported as -well. - -To use the :ref:`format` ioctls applications set the ``type`` -field of a struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_SDR_CAPTURE`` or ``V4L2_BUF_TYPE_SDR_OUTPUT`` and use -the struct :c:type:`v4l2_sdr_format` ``sdr`` member -of the ``fmt`` union as needed per the desired operation. Currently -there is two fields, ``pixelformat`` and ``buffersize``, of struct -struct :c:type:`v4l2_sdr_format` which are used. -Content of the ``pixelformat`` is V4L2 FourCC code of the data format. -The ``buffersize`` field is maximum buffer size in bytes required for -data transfer, set by the driver in order to inform application. - - -.. c:type:: v4l2_sdr_format - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_sdr_format - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``pixelformat`` - - The data format or type of compression, set by the application. - This is a little endian - :ref:`four character code <v4l2-fourcc>`. V4L2 defines SDR - formats in :ref:`sdr-formats`. - * - __u32 - - ``buffersize`` - - Maximum size in bytes required for data. Value is set by the - driver. - * - __u8 - - ``reserved[24]`` - - This array is reserved for future extensions. Drivers and - applications must set it to zero. - - -An SDR device may support :ref:`read/write <rw>` and/or streaming -(:ref:`memory mapping <mmap>` or :ref:`user pointer <userp>`) I/O. diff --git a/Documentation/media/uapi/v4l/dev-sliced-vbi.rst b/Documentation/media/uapi/v4l/dev-sliced-vbi.rst deleted file mode 100644 index 7b2d38dd402a..000000000000 --- a/Documentation/media/uapi/v4l/dev-sliced-vbi.rst +++ /dev/null @@ -1,669 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _sliced: - -************************* -Sliced VBI Data Interface -************************* - -VBI stands for Vertical Blanking Interval, a gap in the sequence of -lines of an analog video signal. During VBI no picture information is -transmitted, allowing some time while the electron beam of a cathode ray -tube TV returns to the top of the screen. - -Sliced VBI devices use hardware to demodulate data transmitted in the -VBI. V4L2 drivers shall *not* do this by software, see also the -:ref:`raw VBI interface <raw-vbi>`. The data is passed as short -packets of fixed size, covering one scan line each. The number of -packets per video frame is variable. - -Sliced VBI capture and output devices are accessed through the same -character special files as raw VBI devices. When a driver supports both -interfaces, the default function of a ``/dev/vbi`` device is *raw* VBI -capturing or output, and the sliced VBI function is only available after -calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl as defined -below. Likewise a ``/dev/video`` device may support the sliced VBI API, -however the default function here is video capturing or output. -Different file descriptors must be used to pass raw and sliced VBI data -simultaneously, if this is supported by the driver. - - -Querying Capabilities -===================== - -Devices supporting the sliced VBI capturing or output API set the -``V4L2_CAP_SLICED_VBI_CAPTURE`` or ``V4L2_CAP_SLICED_VBI_OUTPUT`` flag -respectively, in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. At least one of the -read/write, streaming or asynchronous :ref:`I/O methods <io>` must be -supported. Sliced VBI devices may have a tuner or modulator. - - -Supplemental Functions -====================== - -Sliced VBI devices shall support :ref:`video input or output <video>` -and :ref:`tuner or modulator <tuner>` ioctls if they have these -capabilities, and they may support :ref:`control` ioctls. -The :ref:`video standard <standard>` ioctls provide information vital -to program a sliced VBI device, therefore must be supported. - - -.. _sliced-vbi-format-negotitation: - -Sliced VBI Format Negotiation -============================= - -To find out which data services are supported by the hardware -applications can call the -:ref:`VIDIOC_G_SLICED_VBI_CAP <VIDIOC_G_SLICED_VBI_CAP>` ioctl. -All drivers implementing the sliced VBI interface must support this -ioctl. The results may differ from those of the -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl when the number of VBI -lines the hardware can capture or output per frame, or the number of -services it can identify on a given line are limited. For example on PAL -line 16 the hardware may be able to look for a VPS or Teletext signal, -but not both at the same time. - -To determine the currently selected services applications set the -``type`` field of struct :c:type:`v4l2_format` to -``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` or -``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``, and the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl fills the ``fmt.sliced`` -member, a struct -:c:type:`v4l2_sliced_vbi_format`. - -Applications can request different parameters by initializing or -modifying the ``fmt.sliced`` member and calling the -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with a pointer to the -struct :c:type:`v4l2_format` structure. - -The sliced VBI API is more complicated than the raw VBI API because the -hardware must be told which VBI service to expect on each scan line. Not -all services may be supported by the hardware on all lines (this is -especially true for VBI output where Teletext is often unsupported and -other services can only be inserted in one specific line). In many -cases, however, it is sufficient to just set the ``service_set`` field -to the required services and let the driver fill the ``service_lines`` -array according to hardware capabilities. Only if more precise control -is needed should the programmer set the ``service_lines`` array -explicitly. - -The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl modifies the parameters -according to hardware capabilities. When the driver allocates resources -at this point, it may return an ``EBUSY`` error code if the required -resources are temporarily unavailable. Other resource allocation points -which may return ``EBUSY`` can be the -:ref:`VIDIOC_STREAMON` ioctl and the first -:ref:`read() <func-read>`, :ref:`write() <func-write>` and -:ref:`select() <func-select>` call. - - -.. c:type:: v4l2_sliced_vbi_format - -struct v4l2_sliced_vbi_format ------------------------------ - -.. raw:: latex - - \begingroup - \scriptsize - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{.85cm}|p{3.3cm}|p{4.4cm}|p{4.4cm}|p{4.4cm}| - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 3 2 2 2 - - * - __u32 - - ``service_set`` - - :cspan:`2` - - If ``service_set`` is non-zero when passed with - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` or - :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`, the ``service_lines`` - array will be filled by the driver according to the services - specified in this field. For example, if ``service_set`` is - initialized with ``V4L2_SLICED_TELETEXT_B | V4L2_SLICED_WSS_625``, - a driver for the cx25840 video decoder sets lines 7-22 of both - fields [#f1]_ to ``V4L2_SLICED_TELETEXT_B`` and line 23 of the first - field to ``V4L2_SLICED_WSS_625``. If ``service_set`` is set to - zero, then the values of ``service_lines`` will be used instead. - - On return the driver sets this field to the union of all elements - of the returned ``service_lines`` array. It may contain less - services than requested, perhaps just one, if the hardware cannot - handle more services simultaneously. It may be empty (zero) if - none of the requested services are supported by the hardware. - * - __u16 - - ``service_lines``\ [2][24] - - :cspan:`2` - - Applications initialize this array with sets of data services the - driver shall look for or insert on the respective scan line. - Subject to hardware capabilities drivers return the requested set, - a subset, which may be just a single service, or an empty set. - When the hardware cannot handle multiple services on the same line - the driver shall choose one. No assumptions can be made on which - service the driver chooses. - - Data services are defined in :ref:`vbi-services2`. Array indices - map to ITU-R line numbers\ [#f2]_ as follows: - * - - - - - Element - - 525 line systems - - 625 line systems - * - - - - - ``service_lines``\ [0][1] - - 1 - - 1 - * - - - - - ``service_lines``\ [0][23] - - 23 - - 23 - * - - - - - ``service_lines``\ [1][1] - - 264 - - 314 - * - - - - - ``service_lines``\ [1][23] - - 286 - - 336 - * - - - - - :cspan:`2` Drivers must set ``service_lines`` [0][0] and - ``service_lines``\ [1][0] to zero. The - ``V4L2_VBI_ITU_525_F1_START``, ``V4L2_VBI_ITU_525_F2_START``, - ``V4L2_VBI_ITU_625_F1_START`` and ``V4L2_VBI_ITU_625_F2_START`` - defines give the start line numbers for each field for each 525 or - 625 line format as a convenience. Don't forget that ITU line - numbering starts at 1, not 0. - * - __u32 - - ``io_size`` - - :cspan:`2` Maximum number of bytes passed by one - :ref:`read() <func-read>` or :ref:`write() <func-write>` call, - and the buffer size in bytes for the - :ref:`VIDIOC_QBUF` and - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. Drivers set this field - to the size of struct - :c:type:`v4l2_sliced_vbi_data` times the - number of non-zero elements in the returned ``service_lines`` - array (that is the number of lines potentially carrying data). - * - __u32 - - ``reserved``\ [2] - - :cspan:`2` This array is reserved for future extensions. - - Applications and drivers must set it to zero. - -.. raw:: latex - - \endgroup - -.. _vbi-services2: - -Sliced VBI services -------------------- - -.. raw:: latex - - \scriptsize - -.. tabularcolumns:: |p{4.1cm}|p{1.1cm}|p{2.4cm}|p{2.0cm}|p{7.3cm}| - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - :widths: 2 1 1 2 2 - - * - Symbol - - Value - - Reference - - Lines, usually - - Payload - * - ``V4L2_SLICED_TELETEXT_B`` (Teletext System B) - - 0x0001 - - :ref:`ets300706`, - - :ref:`itu653` - - PAL/SECAM line 7-22, 320-335 (second field 7-22) - - Last 42 of the 45 byte Teletext packet, that is without clock - run-in and framing code, lsb first transmitted. - * - ``V4L2_SLICED_VPS`` - - 0x0400 - - :ref:`ets300231` - - PAL line 16 - - Byte number 3 to 15 according to Figure 9 of ETS 300 231, lsb - first transmitted. - * - ``V4L2_SLICED_CAPTION_525`` - - 0x1000 - - :ref:`cea608` - - NTSC line 21, 284 (second field 21) - - Two bytes in transmission order, including parity bit, lsb first - transmitted. - * - ``V4L2_SLICED_WSS_625`` - - 0x4000 - - :ref:`itu1119`, - - :ref:`en300294` - - PAL/SECAM line 23 - - - - :: - - Byte 0 1 - msb lsb msb lsb - Bit 7 6 5 4 3 2 1 0 x x 13 12 11 10 9 - * - ``V4L2_SLICED_VBI_525`` - - 0x1000 - - :cspan:`2` Set of services applicable to 525 line systems. - * - ``V4L2_SLICED_VBI_625`` - - 0x4401 - - :cspan:`2` Set of services applicable to 625 line systems. - -.. raw:: latex - - \normalsize - - -Drivers may return an ``EINVAL`` error code when applications attempt to -read or write data without prior format negotiation, after switching the -video standard (which may invalidate the negotiated VBI parameters) and -after switching the video input (which may change the video standard as -a side effect). The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl may -return an ``EBUSY`` error code when applications attempt to change the -format while i/o is in progress (between a -:ref:`VIDIOC_STREAMON` and -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` call, and after the first -:ref:`read() <func-read>` or :ref:`write() <func-write>` call). - - -Reading and writing sliced VBI data -=================================== - -A single :ref:`read() <func-read>` or :ref:`write() <func-write>` -call must pass all data belonging to one video frame. That is an array -of struct :c:type:`v4l2_sliced_vbi_data` structures with one or -more elements and a total size not exceeding ``io_size`` bytes. Likewise -in streaming I/O mode one buffer of ``io_size`` bytes must contain data -of one video frame. The ``id`` of unused -struct :c:type:`v4l2_sliced_vbi_data` elements must be zero. - - -.. c:type:: v4l2_sliced_vbi_data - -struct v4l2_sliced_vbi_data ---------------------------- - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - __u32 - - ``id`` - - A flag from :ref:`vbi-services` identifying the type of data in - this packet. Only a single bit must be set. When the ``id`` of a - captured packet is zero, the packet is empty and the contents of - other fields are undefined. Applications shall ignore empty - packets. When the ``id`` of a packet for output is zero the - contents of the ``data`` field are undefined and the driver must - no longer insert data on the requested ``field`` and ``line``. - * - __u32 - - ``field`` - - The video field number this data has been captured from, or shall - be inserted at. ``0`` for the first field, ``1`` for the second - field. - * - __u32 - - ``line`` - - The field (as opposed to frame) line number this data has been - captured from, or shall be inserted at. See :ref:`vbi-525` and - :ref:`vbi-625` for valid values. Sliced VBI capture devices can - set the line number of all packets to ``0`` if the hardware cannot - reliably identify scan lines. The field number must always be - valid. - * - __u32 - - ``reserved`` - - This field is reserved for future extensions. Applications and - drivers must set it to zero. - * - __u8 - - ``data``\ [48] - - The packet payload. See :ref:`vbi-services` for the contents and - number of bytes passed for each data type. The contents of padding - bytes at the end of this array are undefined, drivers and - applications shall ignore them. - - -Packets are always passed in ascending line number order, without -duplicate line numbers. The :ref:`write() <func-write>` function and -the :ref:`VIDIOC_QBUF` ioctl must return an ``EINVAL`` -error code when applications violate this rule. They must also return an -EINVAL error code when applications pass an incorrect field or line -number, or a combination of ``field``, ``line`` and ``id`` which has not -been negotiated with the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` or -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. When the line numbers are -unknown the driver must pass the packets in transmitted order. The -driver can insert empty packets with ``id`` set to zero anywhere in the -packet array. - -To assure synchronization and to distinguish from frame dropping, when a -captured frame does not carry any of the requested data services drivers -must pass one or more empty packets. When an application fails to pass -VBI data in time for output, the driver must output the last VPS and WSS -packet again, and disable the output of Closed Caption and Teletext -data, or output data which is ignored by Closed Caption and Teletext -decoders. - -A sliced VBI device may support :ref:`read/write <rw>` and/or -streaming (:ref:`memory mapping <mmap>` and/or -:ref:`user pointer <userp>`) I/O. The latter bears the possibility of -synchronizing video and VBI data by using buffer timestamps. - - -Sliced VBI Data in MPEG Streams -=============================== - -If a device can produce an MPEG output stream, it may be capable of -providing -:ref:`negotiated sliced VBI services <sliced-vbi-format-negotitation>` -as data embedded in the MPEG stream. Users or applications control this -sliced VBI data insertion with the -:ref:`V4L2_CID_MPEG_STREAM_VBI_FMT <v4l2-mpeg-stream-vbi-fmt>` -control. - -If the driver does not provide the -:ref:`V4L2_CID_MPEG_STREAM_VBI_FMT <v4l2-mpeg-stream-vbi-fmt>` -control, or only allows that control to be set to -:ref:`V4L2_MPEG_STREAM_VBI_FMT_NONE <v4l2-mpeg-stream-vbi-fmt>`, -then the device cannot embed sliced VBI data in the MPEG stream. - -The -:ref:`V4L2_CID_MPEG_STREAM_VBI_FMT <v4l2-mpeg-stream-vbi-fmt>` -control does not implicitly set the device driver to capture nor cease -capturing sliced VBI data. The control only indicates to embed sliced -VBI data in the MPEG stream, if an application has negotiated sliced VBI -service be captured. - -It may also be the case that a device can embed sliced VBI data in only -certain types of MPEG streams: for example in an MPEG-2 PS but not an -MPEG-2 TS. In this situation, if sliced VBI data insertion is requested, -the sliced VBI data will be embedded in MPEG stream types when -supported, and silently omitted from MPEG stream types where sliced VBI -data insertion is not supported by the device. - -The following subsections specify the format of the embedded sliced VBI -data. - - -MPEG Stream Embedded, Sliced VBI Data Format: NONE --------------------------------------------------- - -The -:ref:`V4L2_MPEG_STREAM_VBI_FMT_NONE <v4l2-mpeg-stream-vbi-fmt>` -embedded sliced VBI format shall be interpreted by drivers as a control -to cease embedding sliced VBI data in MPEG streams. Neither the device -nor driver shall insert "empty" embedded sliced VBI data packets in the -MPEG stream when this format is set. No MPEG stream data structures are -specified for this format. - - -MPEG Stream Embedded, Sliced VBI Data Format: IVTV --------------------------------------------------- - -The -:ref:`V4L2_MPEG_STREAM_VBI_FMT_IVTV <v4l2-mpeg-stream-vbi-fmt>` -embedded sliced VBI format, when supported, indicates to the driver to -embed up to 36 lines of sliced VBI data per frame in an MPEG-2 *Private -Stream 1 PES* packet encapsulated in an MPEG-2 *Program Pack* in the -MPEG stream. - -*Historical context*: This format specification originates from a -custom, embedded, sliced VBI data format used by the ``ivtv`` driver. -This format has already been informally specified in the kernel sources -in the file ``Documentation/media/v4l-drivers/cx2341x.rst`` . The -maximum size of the payload and other aspects of this format are driven -by the CX23415 MPEG decoder's capabilities and limitations with respect -to extracting, decoding, and displaying sliced VBI data embedded within -an MPEG stream. - -This format's use is *not* exclusive to the ``ivtv`` driver *nor* -exclusive to CX2341x devices, as the sliced VBI data packet insertion -into the MPEG stream is implemented in driver software. At least the -``cx18`` driver provides sliced VBI data insertion into an MPEG-2 PS in -this format as well. - -The following definitions specify the payload of the MPEG-2 *Private -Stream 1 PES* packets that contain sliced VBI data when -:ref:`V4L2_MPEG_STREAM_VBI_FMT_IVTV <v4l2-mpeg-stream-vbi-fmt>` -is set. (The MPEG-2 *Private Stream 1 PES* packet header and -encapsulating MPEG-2 *Program Pack* header are not detailed here. Please -refer to the MPEG-2 specifications for details on those packet headers.) - -The payload of the MPEG-2 *Private Stream 1 PES* packets that contain -sliced VBI data is specified by struct -:c:type:`v4l2_mpeg_vbi_fmt_ivtv`. The -payload is variable length, depending on the actual number of lines of -sliced VBI data present in a video frame. The payload may be padded at -the end with unspecified fill bytes to align the end of the payload to a -4-byte boundary. The payload shall never exceed 1552 bytes (2 fields -with 18 lines/field with 43 bytes of data/line and a 4 byte magic -number). - - -.. c:type:: v4l2_mpeg_vbi_fmt_ivtv - -struct v4l2_mpeg_vbi_fmt_ivtv ------------------------------ - -.. tabularcolumns:: |p{1.0cm}|p{3.8cm}|p{1.0cm}|p{11.2cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``magic``\ [4] - - A "magic" constant from :ref:`v4l2-mpeg-vbi-fmt-ivtv-magic` that - indicates this is a valid sliced VBI data payload and also - indicates which member of the anonymous union, ``itv0`` or - ``ITV0``, to use for the payload data. - * - union { - - (anonymous) - * - struct :c:type:`v4l2_mpeg_vbi_itv0` - - ``itv0`` - - The primary form of the sliced VBI data payload that contains - anywhere from 1 to 35 lines of sliced VBI data. Line masks are - provided in this form of the payload indicating which VBI lines - are provided. - * - struct :ref:`v4l2_mpeg_vbi_ITV0 <v4l2-mpeg-vbi-itv0-1>` - - ``ITV0`` - - An alternate form of the sliced VBI data payload used when 36 - lines of sliced VBI data are present. No line masks are provided - in this form of the payload; all valid line mask bits are - implcitly set. - * - } - - - -.. _v4l2-mpeg-vbi-fmt-ivtv-magic: - -Magic Constants for struct v4l2_mpeg_vbi_fmt_ivtv magic field -------------------------------------------------------------- - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - :widths: 3 1 4 - - * - Defined Symbol - - Value - - Description - * - ``V4L2_MPEG_VBI_IVTV_MAGIC0`` - - "itv0" - - Indicates the ``itv0`` member of the union in struct - :c:type:`v4l2_mpeg_vbi_fmt_ivtv` is - valid. - * - ``V4L2_MPEG_VBI_IVTV_MAGIC1`` - - "ITV0" - - Indicates the ``ITV0`` member of the union in struct - :c:type:`v4l2_mpeg_vbi_fmt_ivtv` is - valid and that 36 lines of sliced VBI data are present. - - - -.. c:type:: v4l2_mpeg_vbi_itv0 - -.. c:type:: v4l2_mpeg_vbi_ITV0 - -structs v4l2_mpeg_vbi_itv0 and v4l2_mpeg_vbi_ITV0 -------------------------------------------------- - -.. tabularcolumns:: |p{5.2cm}|p{2.4cm}|p{9.9cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __le32 - - ``linemask``\ [2] - - Bitmasks indicating the VBI service lines present. These - ``linemask`` values are stored in little endian byte order in the - MPEG stream. Some reference ``linemask`` bit positions with their - corresponding VBI line number and video field are given below. - b\ :sub:`0` indicates the least significant bit of a ``linemask`` - value: - - - - :: - - linemask[0] b0: line 6 first field - linemask[0] b17: line 23 first field - linemask[0] b18: line 6 second field - linemask[0] b31: line 19 second field - linemask[1] b0: line 20 second field - linemask[1] b3: line 23 second field - linemask[1] b4-b31: unused and set to 0 - * - struct - :c:type:`v4l2_mpeg_vbi_itv0_line` - - ``line``\ [35] - - This is a variable length array that holds from 1 to 35 lines of - sliced VBI data. The sliced VBI data lines present correspond to - the bits set in the ``linemask`` array, starting from b\ :sub:`0` - of ``linemask``\ [0] up through b\ :sub:`31` of ``linemask``\ [0], - and from b\ :sub:`0` of ``linemask``\ [1] up through b\ :sub:`3` of - ``linemask``\ [1]. ``line``\ [0] corresponds to the first bit - found set in the ``linemask`` array, ``line``\ [1] corresponds to - the second bit found set in the ``linemask`` array, etc. If no - ``linemask`` array bits are set, then ``line``\ [0] may contain - one line of unspecified data that should be ignored by - applications. - - - -.. _v4l2-mpeg-vbi-itv0-1: - -struct v4l2_mpeg_vbi_ITV0 -------------------------- - -.. tabularcolumns:: |p{5.2cm}|p{2.4cm}|p{9.9cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - struct - :c:type:`v4l2_mpeg_vbi_itv0_line` - - ``line``\ [36] - - A fixed length array of 36 lines of sliced VBI data. ``line``\ [0] - through ``line``\ [17] correspond to lines 6 through 23 of the - first field. ``line``\ [18] through ``line``\ [35] corresponds to - lines 6 through 23 of the second field. - - - -.. c:type:: v4l2_mpeg_vbi_itv0_line - -struct v4l2_mpeg_vbi_itv0_line ------------------------------- - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``id`` - - A line identifier value from - :ref:`ITV0-Line-Identifier-Constants` that indicates the type of - sliced VBI data stored on this line. - * - __u8 - - ``data``\ [42] - - The sliced VBI data for the line. - - - -.. _ITV0-Line-Identifier-Constants: - -Line Identifiers for struct v4l2_mpeg_vbi_itv0_line id field ------------------------------------------------------------- - -.. tabularcolumns:: |p{7.0cm}|p{1.8cm}|p{8.7cm}| - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - :widths: 3 1 4 - - * - Defined Symbol - - Value - - Description - * - ``V4L2_MPEG_VBI_IVTV_TELETEXT_B`` - - 1 - - Refer to :ref:`Sliced VBI services <vbi-services2>` for a - description of the line payload. - * - ``V4L2_MPEG_VBI_IVTV_CAPTION_525`` - - 4 - - Refer to :ref:`Sliced VBI services <vbi-services2>` for a - description of the line payload. - * - ``V4L2_MPEG_VBI_IVTV_WSS_625`` - - 5 - - Refer to :ref:`Sliced VBI services <vbi-services2>` for a - description of the line payload. - * - ``V4L2_MPEG_VBI_IVTV_VPS`` - - 7 - - Refer to :ref:`Sliced VBI services <vbi-services2>` for a - description of the line payload. - - - -.. [#f1] - According to :ref:`ETS 300 706 <ets300706>` lines 6-22 of the first - field and lines 5-22 of the second field may carry Teletext data. - -.. [#f2] - See also :ref:`vbi-525` and :ref:`vbi-625`. diff --git a/Documentation/media/uapi/v4l/dev-stateless-decoder.rst b/Documentation/media/uapi/v4l/dev-stateless-decoder.rst deleted file mode 100644 index 4a26646eeec5..000000000000 --- a/Documentation/media/uapi/v4l/dev-stateless-decoder.rst +++ /dev/null @@ -1,424 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 - -.. _stateless_decoder: - -************************************************** -Memory-to-memory Stateless Video Decoder Interface -************************************************** - -A stateless decoder is a decoder that works without retaining any kind of state -between processed frames. This means that each frame is decoded independently -of any previous and future frames, and that the client is responsible for -maintaining the decoding state and providing it to the decoder with each -decoding request. This is in contrast to the stateful video decoder interface, -where the hardware and driver maintain the decoding state and all the client -has to do is to provide the raw encoded stream and dequeue decoded frames in -display order. - -This section describes how user-space ("the client") is expected to communicate -with stateless decoders in order to successfully decode an encoded stream. -Compared to stateful codecs, the decoder/client sequence is simpler, but the -cost of this simplicity is extra complexity in the client which is responsible -for maintaining a consistent decoding state. - -Stateless decoders make use of the :ref:`media-request-api`. A stateless -decoder must expose the ``V4L2_BUF_CAP_SUPPORTS_REQUESTS`` capability on its -``OUTPUT`` queue when :c:func:`VIDIOC_REQBUFS` or :c:func:`VIDIOC_CREATE_BUFS` -are invoked. - -Depending on the encoded formats supported by the decoder, a single decoded -frame may be the result of several decode requests (for instance, H.264 streams -with multiple slices per frame). Decoders that support such formats must also -expose the ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` capability on their -``OUTPUT`` queue. - -Querying capabilities -===================== - -1. To enumerate the set of coded formats supported by the decoder, the client - calls :c:func:`VIDIOC_ENUM_FMT` on the ``OUTPUT`` queue. - - * The driver must always return the full set of supported ``OUTPUT`` formats, - irrespective of the format currently set on the ``CAPTURE`` queue. - - * Simultaneously, the driver must restrain the set of values returned by - codec-specific capability controls (such as H.264 profiles) to the set - actually supported by the hardware. - -2. To enumerate the set of supported raw formats, the client calls - :c:func:`VIDIOC_ENUM_FMT` on the ``CAPTURE`` queue. - - * The driver must return only the formats supported for the format currently - active on the ``OUTPUT`` queue. - - * Depending on the currently set ``OUTPUT`` format, the set of supported raw - formats may depend on the value of some codec-dependent controls. - The client is responsible for making sure that these controls are set - before querying the ``CAPTURE`` queue. Failure to do so will result in the - default values for these controls being used, and a returned set of formats - that may not be usable for the media the client is trying to decode. - -3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported - resolutions for a given format, passing desired pixel format in - :c:type:`v4l2_frmsizeenum`'s ``pixel_format``. - -4. Supported profiles and levels for the current ``OUTPUT`` format, if - applicable, may be queried using their respective controls via - :c:func:`VIDIOC_QUERYCTRL`. - -Initialization -============== - -1. Set the coded format on the ``OUTPUT`` queue via :c:func:`VIDIOC_S_FMT`. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - ``pixelformat`` - a coded pixel format. - - ``width``, ``height`` - coded width and height parsed from the stream. - - other fields - follow standard semantics. - - .. note:: - - Changing the ``OUTPUT`` format may change the currently set ``CAPTURE`` - format. The driver will derive a new ``CAPTURE`` format from the - ``OUTPUT`` format being set, including resolution, colorimetry - parameters, etc. If the client needs a specific ``CAPTURE`` format, - it must adjust it afterwards. - -2. Call :c:func:`VIDIOC_S_EXT_CTRLS` to set all the controls (parsed headers, - etc.) required by the ``OUTPUT`` format to enumerate the ``CAPTURE`` formats. - -3. Call :c:func:`VIDIOC_G_FMT` for ``CAPTURE`` queue to get the format for the - destination buffers parsed/decoded from the bytestream. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - * **Returned fields:** - - ``width``, ``height`` - frame buffer resolution for the decoded frames. - - ``pixelformat`` - pixel format for decoded frames. - - ``num_planes`` (for _MPLANE ``type`` only) - number of planes for pixelformat. - - ``sizeimage``, ``bytesperline`` - as per standard semantics; matching frame buffer format. - - .. note:: - - The value of ``pixelformat`` may be any pixel format supported for the - ``OUTPUT`` format, based on the hardware capabilities. It is suggested - that the driver chooses the preferred/optimal format for the current - configuration. For example, a YUV format may be preferred over an RGB - format, if an additional conversion step would be required for RGB. - -4. *[optional]* Enumerate ``CAPTURE`` formats via :c:func:`VIDIOC_ENUM_FMT` on - the ``CAPTURE`` queue. The client may use this ioctl to discover which - alternative raw formats are supported for the current ``OUTPUT`` format and - select one of them via :c:func:`VIDIOC_S_FMT`. - - .. note:: - - The driver will return only formats supported for the currently selected - ``OUTPUT`` format and currently set controls, even if more formats may be - supported by the decoder in general. - - For example, a decoder may support YUV and RGB formats for - resolutions 1920x1088 and lower, but only YUV for higher resolutions (due - to hardware limitations). After setting a resolution of 1920x1088 or lower - as the ``OUTPUT`` format, :c:func:`VIDIOC_ENUM_FMT` may return a set of - YUV and RGB pixel formats, but after setting a resolution higher than - 1920x1088, the driver will not return RGB pixel formats, since they are - unsupported for this resolution. - -5. *[optional]* Choose a different ``CAPTURE`` format than suggested via - :c:func:`VIDIOC_S_FMT` on ``CAPTURE`` queue. It is possible for the client to - choose a different format than selected/suggested by the driver in - :c:func:`VIDIOC_G_FMT`. - - * **Required fields:** - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``pixelformat`` - a raw pixel format. - - ``width``, ``height`` - frame buffer resolution of the decoded stream; typically unchanged from - what was returned with :c:func:`VIDIOC_G_FMT`, but it may be different - if the hardware supports composition and/or scaling. - - After performing this step, the client must perform step 3 again in order - to obtain up-to-date information about the buffers size and layout. - -6. Allocate source (bytestream) buffers via :c:func:`VIDIOC_REQBUFS` on - ``OUTPUT`` queue. - - * **Required fields:** - - ``count`` - requested number of buffers to allocate; greater than zero. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. - - ``memory`` - follows standard semantics. - - * **Return fields:** - - ``count`` - actual number of buffers allocated. - - * If required, the driver will adjust ``count`` to be equal or bigger to the - minimum of required number of ``OUTPUT`` buffers for the given format and - requested count. The client must check this value after the ioctl returns - to get the actual number of buffers allocated. - -7. Allocate destination (raw format) buffers via :c:func:`VIDIOC_REQBUFS` on the - ``CAPTURE`` queue. - - * **Required fields:** - - ``count`` - requested number of buffers to allocate; greater than zero. The client - is responsible for deducing the minimum number of buffers required - for the stream to be properly decoded (taking e.g. reference frames - into account) and pass an equal or bigger number. - - ``type`` - a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. - - ``memory`` - follows standard semantics. ``V4L2_MEMORY_USERPTR`` is not supported - for ``CAPTURE`` buffers. - - * **Return fields:** - - ``count`` - adjusted to allocated number of buffers, in case the codec requires - more buffers than requested. - - * The driver must adjust count to the minimum of required number of - ``CAPTURE`` buffers for the current format, stream configuration and - requested count. The client must check this value after the ioctl - returns to get the number of buffers allocated. - -8. Allocate requests (likely one per ``OUTPUT`` buffer) via - :c:func:`MEDIA_IOC_REQUEST_ALLOC` on the media device. - -9. Start streaming on both ``OUTPUT`` and ``CAPTURE`` queues via - :c:func:`VIDIOC_STREAMON`. - -Decoding -======== - -For each frame, the client is responsible for submitting at least one request to -which the following is attached: - -* The amount of encoded data expected by the codec for its current - configuration, as a buffer submitted to the ``OUTPUT`` queue. Typically, this - corresponds to one frame worth of encoded data, but some formats may allow (or - require) different amounts per unit. -* All the metadata needed to decode the submitted encoded data, in the form of - controls relevant to the format being decoded. - -The amount of data and contents of the source ``OUTPUT`` buffer, as well as the -controls that must be set on the request, depend on the active coded pixel -format and might be affected by codec-specific extended controls, as stated in -documentation of each format. - -If there is a possibility that the decoded frame will require one or more -decode requests after the current one in order to be produced, then the client -must set the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag on the ``OUTPUT`` -buffer. This will result in the (potentially partially) decoded ``CAPTURE`` -buffer not being made available for dequeueing, and reused for the next decode -request if the timestamp of the next ``OUTPUT`` buffer has not changed. - -A typical frame would thus be decoded using the following sequence: - -1. Queue an ``OUTPUT`` buffer containing one unit of encoded bytestream data for - the decoding request, using :c:func:`VIDIOC_QBUF`. - - * **Required fields:** - - ``index`` - index of the buffer being queued. - - ``type`` - type of the buffer. - - ``bytesused`` - number of bytes taken by the encoded data frame in the buffer. - - ``flags`` - the ``V4L2_BUF_FLAG_REQUEST_FD`` flag must be set. Additionally, if - we are not sure that the current decode request is the last one needed - to produce a fully decoded frame, then - ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` must also be set. - - ``request_fd`` - must be set to the file descriptor of the decoding request. - - ``timestamp`` - must be set to a unique value per frame. This value will be propagated - into the decoded frame's buffer and can also be used to use this frame - as the reference of another. If using multiple decode requests per - frame, then the timestamps of all the ``OUTPUT`` buffers for a given - frame must be identical. If the timestamp changes, then the currently - held ``CAPTURE`` buffer will be made available for dequeuing and the - current request will work on a new ``CAPTURE`` buffer. - -2. Set the codec-specific controls for the decoding request, using - :c:func:`VIDIOC_S_EXT_CTRLS`. - - * **Required fields:** - - ``which`` - must be ``V4L2_CTRL_WHICH_REQUEST_VAL``. - - ``request_fd`` - must be set to the file descriptor of the decoding request. - - other fields - other fields are set as usual when setting controls. The ``controls`` - array must contain all the codec-specific controls required to decode - a frame. - - .. note:: - - It is possible to specify the controls in different invocations of - :c:func:`VIDIOC_S_EXT_CTRLS`, or to overwrite a previously set control, as - long as ``request_fd`` and ``which`` are properly set. The controls state - at the moment of request submission is the one that will be considered. - - .. note:: - - The order in which steps 1 and 2 take place is interchangeable. - -3. Submit the request by invoking :c:func:`MEDIA_REQUEST_IOC_QUEUE` on the - request FD. - - If the request is submitted without an ``OUTPUT`` buffer, or if some of the - required controls are missing from the request, then - :c:func:`MEDIA_REQUEST_IOC_QUEUE` will return ``-ENOENT``. If more than one - ``OUTPUT`` buffer is queued, then it will return ``-EINVAL``. - :c:func:`MEDIA_REQUEST_IOC_QUEUE` returning non-zero means that no - ``CAPTURE`` buffer will be produced for this request. - -``CAPTURE`` buffers must not be part of the request, and are queued -independently. They are returned in decode order (i.e. the same order as coded -frames were submitted to the ``OUTPUT`` queue). - -Runtime decoding errors are signaled by the dequeued ``CAPTURE`` buffers -carrying the ``V4L2_BUF_FLAG_ERROR`` flag. If a decoded reference frame has an -error, then all following decoded frames that refer to it also have the -``V4L2_BUF_FLAG_ERROR`` flag set, although the decoder will still try to -produce (likely corrupted) frames. - -Buffer management while decoding -================================ -Contrary to stateful decoders, a stateless decoder does not perform any kind of -buffer management: it only guarantees that dequeued ``CAPTURE`` buffers can be -used by the client for as long as they are not queued again. "Used" here -encompasses using the buffer for compositing or display. - -A dequeued capture buffer can also be used as the reference frame of another -buffer. - -A frame is specified as reference by converting its timestamp into nanoseconds, -and storing it into the relevant member of a codec-dependent control structure. -The :c:func:`v4l2_timeval_to_ns` function must be used to perform that -conversion. The timestamp of a frame can be used to reference it as soon as all -its units of encoded data are successfully submitted to the ``OUTPUT`` queue. - -A decoded buffer containing a reference frame must not be reused as a decoding -target until all the frames referencing it have been decoded. The safest way to -achieve this is to refrain from queueing a reference buffer until all the -decoded frames referencing it have been dequeued. However, if the driver can -guarantee that buffers queued to the ``CAPTURE`` queue are processed in queued -order, then user-space can take advantage of this guarantee and queue a -reference buffer when the following conditions are met: - -1. All the requests for frames affected by the reference frame have been - queued, and - -2. A sufficient number of ``CAPTURE`` buffers to cover all the decoded - referencing frames have been queued. - -When queuing a decoding request, the driver will increase the reference count of -all the resources associated with reference frames. This means that the client -can e.g. close the DMABUF file descriptors of reference frame buffers if it -won't need them afterwards. - -Seeking -======= -In order to seek, the client just needs to submit requests using input buffers -corresponding to the new stream position. It must however be aware that -resolution may have changed and follow the dynamic resolution change sequence in -that case. Also depending on the codec used, picture parameters (e.g. SPS/PPS -for H.264) may have changed and the client is responsible for making sure that a -valid state is sent to the decoder. - -The client is then free to ignore any returned ``CAPTURE`` buffer that comes -from the pre-seek position. - -Pausing -======= - -In order to pause, the client can just cease queuing buffers onto the ``OUTPUT`` -queue. Without source bytestream data, there is no data to process and the codec -will remain idle. - -Dynamic resolution change -========================= - -If the client detects a resolution change in the stream, it will need to perform -the initialization sequence again with the new resolution: - -1. If the last submitted request resulted in a ``CAPTURE`` buffer being - held by the use of the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag, then the - last frame is not available on the ``CAPTURE`` queue. In this case, a - ``V4L2_DEC_CMD_FLUSH`` command shall be sent. This will make the driver - dequeue the held ``CAPTURE`` buffer. - -2. Wait until all submitted requests have completed and dequeue the - corresponding output buffers. - -3. Call :c:func:`VIDIOC_STREAMOFF` on both the ``OUTPUT`` and ``CAPTURE`` - queues. - -4. Free all ``CAPTURE`` buffers by calling :c:func:`VIDIOC_REQBUFS` on the - ``CAPTURE`` queue with a buffer count of zero. - -5. Perform the initialization sequence again (minus the allocation of - ``OUTPUT`` buffers), with the new resolution set on the ``OUTPUT`` queue. - Note that due to resolution constraints, a different format may need to be - picked on the ``CAPTURE`` queue. - -Drain -===== - -If the last submitted request resulted in a ``CAPTURE`` buffer being -held by the use of the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag, then the -last frame is not available on the ``CAPTURE`` queue. In this case, a -``V4L2_DEC_CMD_FLUSH`` command shall be sent. This will make the driver -dequeue the held ``CAPTURE`` buffer. - -After that, in order to drain the stream on a stateless decoder, the client -just needs to wait until all the submitted requests are completed. diff --git a/Documentation/media/uapi/v4l/dev-subdev.rst b/Documentation/media/uapi/v4l/dev-subdev.rst deleted file mode 100644 index 029bb2d9928a..000000000000 --- a/Documentation/media/uapi/v4l/dev-subdev.rst +++ /dev/null @@ -1,503 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _subdev: - -******************** -Sub-device Interface -******************** - -The complex nature of V4L2 devices, where hardware is often made of -several integrated circuits that need to interact with each other in a -controlled way, leads to complex V4L2 drivers. The drivers usually -reflect the hardware model in software, and model the different hardware -components as software blocks called sub-devices. - -V4L2 sub-devices are usually kernel-only objects. If the V4L2 driver -implements the media device API, they will automatically inherit from -media entities. Applications will be able to enumerate the sub-devices -and discover the hardware topology using the media entities, pads and -links enumeration API. - -In addition to make sub-devices discoverable, drivers can also choose to -make them directly configurable by applications. When both the -sub-device driver and the V4L2 device driver support this, sub-devices -will feature a character device node on which ioctls can be called to - -- query, read and write sub-devices controls - -- subscribe and unsubscribe to events and retrieve them - -- negotiate image formats on individual pads - -Sub-device character device nodes, conventionally named -``/dev/v4l-subdev*``, use major number 81. - - -Controls -======== - -Most V4L2 controls are implemented by sub-device hardware. Drivers -usually merge all controls and expose them through video device nodes. -Applications can control all sub-devices through a single interface. - -Complex devices sometimes implement the same control in different pieces -of hardware. This situation is common in embedded platforms, where both -sensors and image processing hardware implement identical functions, -such as contrast adjustment, white balance or faulty pixels correction. -As the V4L2 controls API doesn't support several identical controls in a -single device, all but one of the identical controls are hidden. - -Applications can access those hidden controls through the sub-device -node with the V4L2 control API described in :ref:`control`. The ioctls -behave identically as when issued on V4L2 device nodes, with the -exception that they deal only with controls implemented in the -sub-device. - -Depending on the driver, those controls might also be exposed through -one (or several) V4L2 device nodes. - - -Events -====== - -V4L2 sub-devices can notify applications of events as described in -:ref:`event`. The API behaves identically as when used on V4L2 device -nodes, with the exception that it only deals with events generated by -the sub-device. Depending on the driver, those events might also be -reported on one (or several) V4L2 device nodes. - - -.. _pad-level-formats: - -Pad-level Formats -================= - -.. warning:: - - Pad-level formats are only applicable to very complex devices that - need to expose low-level format configuration to user space. Generic - V4L2 applications do *not* need to use the API described in this - section. - -.. note:: - - For the purpose of this section, the term *format* means the - combination of media bus data format, frame width and frame height. - -Image formats are typically negotiated on video capture and output -devices using the format and -:ref:`selection <VIDIOC_SUBDEV_G_SELECTION>` ioctls. The driver is -responsible for configuring every block in the video pipeline according -to the requested format at the pipeline input and/or output. - -For complex devices, such as often found in embedded systems, identical -image sizes at the output of a pipeline can be achieved using different -hardware configurations. One such example is shown on -:ref:`pipeline-scaling`, where image scaling can be performed on both -the video sensor and the host image processing hardware. - - -.. _pipeline-scaling: - -.. kernel-figure:: pipeline.dot - :alt: pipeline.dot - :align: center - - Image Format Negotiation on Pipelines - - High quality and high speed pipeline configuration - - - -The sensor scaler is usually of less quality than the host scaler, but -scaling on the sensor is required to achieve higher frame rates. -Depending on the use case (quality vs. speed), the pipeline must be -configured differently. Applications need to configure the formats at -every point in the pipeline explicitly. - -Drivers that implement the :ref:`media API <media-controller-intro>` -can expose pad-level image format configuration to applications. When -they do, applications can use the -:ref:`VIDIOC_SUBDEV_G_FMT <VIDIOC_SUBDEV_G_FMT>` and -:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctls. to -negotiate formats on a per-pad basis. - -Applications are responsible for configuring coherent parameters on the -whole pipeline and making sure that connected pads have compatible -formats. The pipeline is checked for formats mismatch at -:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` time, and an ``EPIPE`` error -code is then returned if the configuration is invalid. - -Pad-level image format configuration support can be tested by calling -the :ref:`VIDIOC_SUBDEV_G_FMT` ioctl on pad -0. If the driver returns an ``EINVAL`` error code pad-level format -configuration is not supported by the sub-device. - - -Format Negotiation ------------------- - -Acceptable formats on pads can (and usually do) depend on a number of -external parameters, such as formats on other pads, active links, or -even controls. Finding a combination of formats on all pads in a video -pipeline, acceptable to both application and driver, can't rely on -formats enumeration only. A format negotiation mechanism is required. - -Central to the format negotiation mechanism are the get/set format -operations. When called with the ``which`` argument set to -:ref:`V4L2_SUBDEV_FORMAT_TRY <VIDIOC_SUBDEV_G_FMT>`, the -:ref:`VIDIOC_SUBDEV_G_FMT <VIDIOC_SUBDEV_G_FMT>` and -:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctls operate on -a set of formats parameters that are not connected to the hardware -configuration. Modifying those 'try' formats leaves the device state -untouched (this applies to both the software state stored in the driver -and the hardware state stored in the device itself). - -While not kept as part of the device state, try formats are stored in -the sub-device file handles. A -:ref:`VIDIOC_SUBDEV_G_FMT <VIDIOC_SUBDEV_G_FMT>` call will return -the last try format set *on the same sub-device file handle*. Several -applications querying the same sub-device at the same time will thus not -interact with each other. - -To find out whether a particular format is supported by the device, -applications use the -:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctl. Drivers -verify and, if needed, change the requested ``format`` based on device -requirements and return the possibly modified value. Applications can -then choose to try a different format or accept the returned value and -continue. - -Formats returned by the driver during a negotiation iteration are -guaranteed to be supported by the device. In particular, drivers -guarantee that a returned format will not be further changed if passed -to an :ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` call as-is -(as long as external parameters, such as formats on other pads or links' -configuration are not changed). - -Drivers automatically propagate formats inside sub-devices. When a try -or active format is set on a pad, corresponding formats on other pads of -the same sub-device can be modified by the driver. Drivers are free to -modify formats as required by the device. However, they should comply -with the following rules when possible: - -- Formats should be propagated from sink pads to source pads. Modifying - a format on a source pad should not modify the format on any sink - pad. - -- Sub-devices that scale frames using variable scaling factors should - reset the scale factors to default values when sink pads formats are - modified. If the 1:1 scaling ratio is supported, this means that - source pads formats should be reset to the sink pads formats. - -Formats are not propagated across links, as that would involve -propagating them from one sub-device file handle to another. -Applications must then take care to configure both ends of every link -explicitly with compatible formats. Identical formats on the two ends of -a link are guaranteed to be compatible. Drivers are free to accept -different formats matching device requirements as being compatible. - -:ref:`sample-pipeline-config` shows a sample configuration sequence -for the pipeline described in :ref:`pipeline-scaling` (table columns -list entity names and pad numbers). - - -.. raw:: latex - - \scriptsize - -.. tabularcolumns:: |p{2.0cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}|p{2.3cm}| - -.. _sample-pipeline-config: - -.. flat-table:: Sample Pipeline Configuration - :header-rows: 1 - :stub-columns: 0 - :widths: 5 5 5 5 5 5 5 - - * - - - Sensor/0 - - format - - Frontend/0 - - format - - Frontend/1 - - format - - Scaler/0 - - format - - Scaler/0 - - compose selection rectangle - - Scaler/1 - - format - * - Initial state - - 2048x1536 - - SGRBG8_1X8 - - (default) - - (default) - - (default) - - (default) - - (default) - * - Configure frontend sink format - - 2048x1536 - - SGRBG8_1X8 - - *2048x1536* - - *SGRBG8_1X8* - - *2046x1534* - - *SGRBG8_1X8* - - (default) - - (default) - - (default) - * - Configure scaler sink format - - 2048x1536 - - SGRBG8_1X8 - - 2048x1536 - - SGRBG8_1X8 - - 2046x1534 - - SGRBG8_1X8 - - *2046x1534* - - *SGRBG8_1X8* - - *0,0/2046x1534* - - *2046x1534* - - *SGRBG8_1X8* - * - Configure scaler sink compose selection - - 2048x1536 - - SGRBG8_1X8 - - 2048x1536 - - SGRBG8_1X8 - - 2046x1534 - - SGRBG8_1X8 - - 2046x1534 - - SGRBG8_1X8 - - *0,0/1280x960* - - *1280x960* - - *SGRBG8_1X8* - -.. raw:: latex - - \normalsize - -1. Initial state. The sensor source pad format is set to its native 3MP - size and V4L2_MBUS_FMT_SGRBG8_1X8 media bus code. Formats on the - host frontend and scaler sink and source pads have the default - values, as well as the compose rectangle on the scaler's sink pad. - -2. The application configures the frontend sink pad format's size to - 2048x1536 and its media bus code to V4L2_MBUS_FMT_SGRBG_1X8. The - driver propagates the format to the frontend source pad. - -3. The application configures the scaler sink pad format's size to - 2046x1534 and the media bus code to V4L2_MBUS_FMT_SGRBG_1X8 to - match the frontend source size and media bus code. The media bus code - on the sink pad is set to V4L2_MBUS_FMT_SGRBG_1X8. The driver - propagates the size to the compose selection rectangle on the - scaler's sink pad, and the format to the scaler source pad. - -4. The application configures the size of the compose selection - rectangle of the scaler's sink pad 1280x960. The driver propagates - the size to the scaler's source pad format. - -When satisfied with the try results, applications can set the active -formats by setting the ``which`` argument to -``V4L2_SUBDEV_FORMAT_ACTIVE``. Active formats are changed exactly as try -formats by drivers. To avoid modifying the hardware state during format -negotiation, applications should negotiate try formats first and then -modify the active settings using the try formats returned during the -last negotiation iteration. This guarantees that the active format will -be applied as-is by the driver without being modified. - - -.. _v4l2-subdev-selections: - -Selections: cropping, scaling and composition ---------------------------------------------- - -Many sub-devices support cropping frames on their input or output pads -(or possible even on both). Cropping is used to select the area of -interest in an image, typically on an image sensor or a video decoder. -It can also be used as part of digital zoom implementations to select -the area of the image that will be scaled up. - -Crop settings are defined by a crop rectangle and represented in a -struct :c:type:`v4l2_rect` by the coordinates of the top -left corner and the rectangle size. Both the coordinates and sizes are -expressed in pixels. - -As for pad formats, drivers store try and active rectangles for the -selection targets :ref:`v4l2-selections-common`. - -On sink pads, cropping is applied relative to the current pad format. -The pad format represents the image size as received by the sub-device -from the previous block in the pipeline, and the crop rectangle -represents the sub-image that will be transmitted further inside the -sub-device for processing. - -The scaling operation changes the size of the image by scaling it to new -dimensions. The scaling ratio isn't specified explicitly, but is implied -from the original and scaled image sizes. Both sizes are represented by -struct :c:type:`v4l2_rect`. - -Scaling support is optional. When supported by a subdev, the crop -rectangle on the subdev's sink pad is scaled to the size configured -using the -:ref:`VIDIOC_SUBDEV_S_SELECTION <VIDIOC_SUBDEV_G_SELECTION>` IOCTL -using ``V4L2_SEL_TGT_COMPOSE`` selection target on the same pad. If the -subdev supports scaling but not composing, the top and left values are -not used and must always be set to zero. - -On source pads, cropping is similar to sink pads, with the exception -that the source size from which the cropping is performed, is the -COMPOSE rectangle on the sink pad. In both sink and source pads, the -crop rectangle must be entirely contained inside the source image size -for the crop operation. - -The drivers should always use the closest possible rectangle the user -requests on all selection targets, unless specifically told otherwise. -``V4L2_SEL_FLAG_GE`` and ``V4L2_SEL_FLAG_LE`` flags may be used to round -the image size either up or down. :ref:`v4l2-selection-flags` - - -Types of selection targets --------------------------- - - -Actual targets -^^^^^^^^^^^^^^ - -Actual targets (without a postfix) reflect the actual hardware -configuration at any point of time. There is a BOUNDS target -corresponding to every actual target. - - -BOUNDS targets -^^^^^^^^^^^^^^ - -BOUNDS targets is the smallest rectangle that contains all valid actual -rectangles. It may not be possible to set the actual rectangle as large -as the BOUNDS rectangle, however. This may be because e.g. a sensor's -pixel array is not rectangular but cross-shaped or round. The maximum -size may also be smaller than the BOUNDS rectangle. - - -Order of configuration and format propagation ---------------------------------------------- - -Inside subdevs, the order of image processing steps will always be from -the sink pad towards the source pad. This is also reflected in the order -in which the configuration must be performed by the user: the changes -made will be propagated to any subsequent stages. If this behaviour is -not desired, the user must set ``V4L2_SEL_FLAG_KEEP_CONFIG`` flag. This -flag causes no propagation of the changes are allowed in any -circumstances. This may also cause the accessed rectangle to be adjusted -by the driver, depending on the properties of the underlying hardware. - -The coordinates to a step always refer to the actual size of the -previous step. The exception to this rule is the sink compose -rectangle, which refers to the sink compose bounds rectangle --- if it -is supported by the hardware. - -1. Sink pad format. The user configures the sink pad format. This format - defines the parameters of the image the entity receives through the - pad for further processing. - -2. Sink pad actual crop selection. The sink pad crop defines the crop - performed to the sink pad format. - -3. Sink pad actual compose selection. The size of the sink pad compose - rectangle defines the scaling ratio compared to the size of the sink - pad crop rectangle. The location of the compose rectangle specifies - the location of the actual sink compose rectangle in the sink compose - bounds rectangle. - -4. Source pad actual crop selection. Crop on the source pad defines crop - performed to the image in the sink compose bounds rectangle. - -5. Source pad format. The source pad format defines the output pixel - format of the subdev, as well as the other parameters with the - exception of the image width and height. Width and height are defined - by the size of the source pad actual crop selection. - -Accessing any of the above rectangles not supported by the subdev will -return ``EINVAL``. Any rectangle referring to a previous unsupported -rectangle coordinates will instead refer to the previous supported -rectangle. For example, if sink crop is not supported, the compose -selection will refer to the sink pad format dimensions instead. - - -.. _subdev-image-processing-crop: - -.. kernel-figure:: subdev-image-processing-crop.svg - :alt: subdev-image-processing-crop.svg - :align: center - - **Figure 4.5. Image processing in subdevs: simple crop example** - -In the above example, the subdev supports cropping on its sink pad. To -configure it, the user sets the media bus format on the subdev's sink -pad. Now the actual crop rectangle can be set on the sink pad --- the -location and size of this rectangle reflect the location and size of a -rectangle to be cropped from the sink format. The size of the sink crop -rectangle will also be the size of the format of the subdev's source -pad. - - -.. _subdev-image-processing-scaling-multi-source: - -.. kernel-figure:: subdev-image-processing-scaling-multi-source.svg - :alt: subdev-image-processing-scaling-multi-source.svg - :align: center - - **Figure 4.6. Image processing in subdevs: scaling with multiple sources** - -In this example, the subdev is capable of first cropping, then scaling -and finally cropping for two source pads individually from the resulting -scaled image. The location of the scaled image in the cropped image is -ignored in sink compose target. Both of the locations of the source crop -rectangles refer to the sink scaling rectangle, independently cropping -an area at location specified by the source crop rectangle from it. - - -.. _subdev-image-processing-full: - -.. kernel-figure:: subdev-image-processing-full.svg - :alt: subdev-image-processing-full.svg - :align: center - - **Figure 4.7. Image processing in subdevs: scaling and composition with multiple sinks and sources** - -The subdev driver supports two sink pads and two source pads. The images -from both of the sink pads are individually cropped, then scaled and -further composed on the composition bounds rectangle. From that, two -independent streams are cropped and sent out of the subdev from the -source pads. - - -.. toctree:: - :maxdepth: 1 - - subdev-formats diff --git a/Documentation/media/uapi/v4l/dev-touch.rst b/Documentation/media/uapi/v4l/dev-touch.rst deleted file mode 100644 index 356f01385221..000000000000 --- a/Documentation/media/uapi/v4l/dev-touch.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _touch: - -************* -Touch Devices -************* - -Touch devices are accessed through character device special files named -``/dev/v4l-touch0`` to ``/dev/v4l-touch255`` with major number 81 and -dynamically allocated minor numbers 0 to 255. - -Overview -======== - -Sensors may be Optical, or Projected Capacitive touch (PCT). - -Processing is required to analyse the raw data and produce input events. In -some systems, this may be performed on the ASIC and the raw data is purely a -side-channel for diagnostics or tuning. In other systems, the ASIC is a simple -analogue front end device which delivers touch data at high rate, and any touch -processing must be done on the host. - -For capacitive touch sensing, the touchscreen is composed of an array of -horizontal and vertical conductors (alternatively called rows/columns, X/Y -lines, or tx/rx). Mutual Capacitance measured is at the nodes where the -conductors cross. Alternatively, Self Capacitance measures the signal from each -column and row independently. - -A touch input may be determined by comparing the raw capacitance measurement to -a no-touch reference (or "baseline") measurement: - -Delta = Raw - Reference - -The reference measurement takes account of variations in the capacitance across -the touch sensor matrix, for example manufacturing irregularities, -environmental or edge effects. - -Querying Capabilities -===================== - -Devices supporting the touch interface set the ``V4L2_CAP_VIDEO_CAPTURE`` flag -and the ``V4L2_CAP_TOUCH`` flag in the ``capabilities`` field of -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl. - -At least one of the read/write or streaming I/O methods must be -supported. - -The formats supported by touch devices are documented in -:ref:`Touch Formats <tch-formats>`. - -Data Format Negotiation -======================= - -A touch device may support any I/O method. diff --git a/Documentation/media/uapi/v4l/devices.rst b/Documentation/media/uapi/v4l/devices.rst deleted file mode 100644 index 07f8d047662b..000000000000 --- a/Documentation/media/uapi/v4l/devices.rst +++ /dev/null @@ -1,33 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _devices: - -********** -Interfaces -********** - - -.. toctree:: - :maxdepth: 1 - - dev-capture - dev-overlay - dev-output - dev-osd - dev-mem2mem - dev-raw-vbi - dev-sliced-vbi - dev-radio - dev-rds - dev-sdr - dev-touch - dev-event - dev-subdev - dev-meta diff --git a/Documentation/media/uapi/v4l/diff-v4l.rst b/Documentation/media/uapi/v4l/diff-v4l.rst deleted file mode 100644 index dd6739e8a5b2..000000000000 --- a/Documentation/media/uapi/v4l/diff-v4l.rst +++ /dev/null @@ -1,693 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _diff-v4l: - -******************************** -Differences between V4L and V4L2 -******************************** - -The Video For Linux API was first introduced in Linux 2.1 to unify and -replace various TV and radio device related interfaces, developed -independently by driver writers in prior years. Starting with Linux 2.5 -the much improved V4L2 API replaces the V4L API. The support for the old -V4L calls were removed from Kernel, but the library :ref:`libv4l` -supports the conversion of a V4L API system call into a V4L2 one. - - -Opening and Closing Devices -=========================== - -For compatibility reasons the character device file names recommended -for V4L2 video capture, overlay, radio and raw vbi capture devices did -not change from those used by V4L. They are listed in :ref:`devices` -and below in :ref:`v4l-dev`. - -The teletext devices (minor range 192-223) have been removed in V4L2 and -no longer exist. There is no hardware available anymore for handling -pure teletext. Instead raw or sliced VBI is used. - -The V4L ``videodev`` module automatically assigns minor numbers to -drivers in load order, depending on the registered device type. We -recommend that V4L2 drivers by default register devices with the same -numbers, but the system administrator can assign arbitrary minor numbers -using driver module options. The major device number remains 81. - - -.. _v4l-dev: - -.. flat-table:: V4L Device Types, Names and Numbers - :header-rows: 1 - :stub-columns: 0 - - * - Device Type - - File Name - - Minor Numbers - * - Video capture and overlay - - ``/dev/video`` and ``/dev/bttv0``\ [#f1]_, ``/dev/video0`` to - ``/dev/video63`` - - 0-63 - * - Radio receiver - - ``/dev/radio``\ [#f2]_, ``/dev/radio0`` to ``/dev/radio63`` - - 64-127 - * - Raw VBI capture - - ``/dev/vbi``, ``/dev/vbi0`` to ``/dev/vbi31`` - - 224-255 - - -V4L prohibits (or used to prohibit) multiple opens of a device file. -V4L2 drivers *may* support multiple opens, see :ref:`open` for details -and consequences. - -V4L drivers respond to V4L2 ioctls with an ``EINVAL`` error code. - - -Querying Capabilities -===================== - -The V4L ``VIDIOCGCAP`` ioctl is equivalent to V4L2's -:ref:`VIDIOC_QUERYCAP`. - -The ``name`` field in struct ``video_capability`` became -``card`` in struct :c:type:`v4l2_capability`, ``type`` -was replaced by ``capabilities``. Note V4L2 does not distinguish between -device types like this, better think of basic video input, video output -and radio devices supporting a set of related functions like video -capturing, video overlay and VBI capturing. See :ref:`open` for an -introduction. - -.. tabularcolumns:: |p{5.5cm}|p{6.5cm}|p{5.5cm} - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - ``struct video_capability`` ``type`` - - struct :c:type:`v4l2_capability` - ``capabilities`` flags - - Purpose - * - ``VID_TYPE_CAPTURE`` - - ``V4L2_CAP_VIDEO_CAPTURE`` - - The :ref:`video capture <capture>` interface is supported. - * - ``VID_TYPE_TUNER`` - - ``V4L2_CAP_TUNER`` - - The device has a :ref:`tuner or modulator <tuner>`. - * - ``VID_TYPE_TELETEXT`` - - ``V4L2_CAP_VBI_CAPTURE`` - - The :ref:`raw VBI capture <raw-vbi>` interface is supported. - * - ``VID_TYPE_OVERLAY`` - - ``V4L2_CAP_VIDEO_OVERLAY`` - - The :ref:`video overlay <overlay>` interface is supported. - * - ``VID_TYPE_CHROMAKEY`` - - ``V4L2_FBUF_CAP_CHROMAKEY`` in field ``capability`` of struct - :c:type:`v4l2_framebuffer` - - Whether chromakey overlay is supported. For more information on - overlay see :ref:`overlay`. - * - ``VID_TYPE_CLIPPING`` - - ``V4L2_FBUF_CAP_LIST_CLIPPING`` and - ``V4L2_FBUF_CAP_BITMAP_CLIPPING`` in field ``capability`` of - struct :c:type:`v4l2_framebuffer` - - Whether clipping the overlaid image is supported, see - :ref:`overlay`. - * - ``VID_TYPE_FRAMERAM`` - - ``V4L2_FBUF_CAP_EXTERNOVERLAY`` *not set* in field ``capability`` - of struct :c:type:`v4l2_framebuffer` - - Whether overlay overwrites frame buffer memory, see - :ref:`overlay`. - * - ``VID_TYPE_SCALES`` - - ``-`` - - This flag indicates if the hardware can scale images. The V4L2 API - implies the scale factor by setting the cropping dimensions and - image size with the :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` and - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, respectively. The - driver returns the closest sizes possible. For more information on - cropping and scaling see :ref:`crop`. - * - ``VID_TYPE_MONOCHROME`` - - ``-`` - - Applications can enumerate the supported image formats with the - :ref:`VIDIOC_ENUM_FMT` ioctl to determine if - the device supports grey scale capturing only. For more - information on image formats see :ref:`pixfmt`. - * - ``VID_TYPE_SUBCAPTURE`` - - ``-`` - - Applications can call the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` - ioctl to determine if the device supports capturing a subsection - of the full picture ("cropping" in V4L2). If not, the ioctl - returns the ``EINVAL`` error code. For more information on cropping - and scaling see :ref:`crop`. - * - ``VID_TYPE_MPEG_DECODER`` - - ``-`` - - Applications can enumerate the supported image formats with the - :ref:`VIDIOC_ENUM_FMT` ioctl to determine if - the device supports MPEG streams. - * - ``VID_TYPE_MPEG_ENCODER`` - - ``-`` - - See above. - * - ``VID_TYPE_MJPEG_DECODER`` - - ``-`` - - See above. - * - ``VID_TYPE_MJPEG_ENCODER`` - - ``-`` - - See above. - - -The ``audios`` field was replaced by ``capabilities`` flag -``V4L2_CAP_AUDIO``, indicating *if* the device has any audio inputs or -outputs. To determine their number applications can enumerate audio -inputs with the :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` ioctl. The -audio ioctls are described in :ref:`audio`. - -The ``maxwidth``, ``maxheight``, ``minwidth`` and ``minheight`` fields -were removed. Calling the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` or -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl with the desired -dimensions returns the closest size possible, taking into account the -current video standard, cropping and scaling limitations. - - -Video Sources -============= - -V4L provides the ``VIDIOCGCHAN`` and ``VIDIOCSCHAN`` ioctl using struct -``video_channel`` to enumerate the video inputs of a V4L -device. The equivalent V4L2 ioctls are -:ref:`VIDIOC_ENUMINPUT`, -:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` and -:ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` using struct -:c:type:`v4l2_input` as discussed in :ref:`video`. - -The ``channel`` field counting inputs was renamed to ``index``, the -video input types were renamed as follows: - - - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - struct ``video_channel`` ``type`` - - struct :c:type:`v4l2_input` ``type`` - * - ``VIDEO_TYPE_TV`` - - ``V4L2_INPUT_TYPE_TUNER`` - * - ``VIDEO_TYPE_CAMERA`` - - ``V4L2_INPUT_TYPE_CAMERA`` - - -Unlike the ``tuners`` field expressing the number of tuners of this -input, V4L2 assumes each video input is connected to at most one tuner. -However a tuner can have more than one input, i. e. RF connectors, and a -device can have multiple tuners. The index number of the tuner -associated with the input, if any, is stored in field ``tuner`` of -struct :c:type:`v4l2_input`. Enumeration of tuners is -discussed in :ref:`tuner`. - -The redundant ``VIDEO_VC_TUNER`` flag was dropped. Video inputs -associated with a tuner are of type ``V4L2_INPUT_TYPE_TUNER``. The -``VIDEO_VC_AUDIO`` flag was replaced by the ``audioset`` field. V4L2 -considers devices with up to 32 audio inputs. Each set bit in the -``audioset`` field represents one audio input this video input combines -with. For information about audio inputs and how to switch between them -see :ref:`audio`. - -The ``norm`` field describing the supported video standards was replaced -by ``std``. The V4L specification mentions a flag ``VIDEO_VC_NORM`` -indicating whether the standard can be changed. This flag was a later -addition together with the ``norm`` field and has been removed in the -meantime. V4L2 has a similar, albeit more comprehensive approach to -video standards, see :ref:`standard` for more information. - - -Tuning -====== - -The V4L ``VIDIOCGTUNER`` and ``VIDIOCSTUNER`` ioctl and struct -``video_tuner`` can be used to enumerate the tuners of a -V4L TV or radio device. The equivalent V4L2 ioctls are -:ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` and -:ref:`VIDIOC_S_TUNER <VIDIOC_G_TUNER>` using struct -:c:type:`v4l2_tuner`. Tuners are covered in :ref:`tuner`. - -The ``tuner`` field counting tuners was renamed to ``index``. The fields -``name``, ``rangelow`` and ``rangehigh`` remained unchanged. - -The ``VIDEO_TUNER_PAL``, ``VIDEO_TUNER_NTSC`` and ``VIDEO_TUNER_SECAM`` -flags indicating the supported video standards were dropped. This -information is now contained in the associated struct -:c:type:`v4l2_input`. No replacement exists for the -``VIDEO_TUNER_NORM`` flag indicating whether the video standard can be -switched. The ``mode`` field to select a different video standard was -replaced by a whole new set of ioctls and structures described in -:ref:`standard`. Due to its ubiquity it should be mentioned the BTTV -driver supports several standards in addition to the regular -``VIDEO_MODE_PAL`` (0), ``VIDEO_MODE_NTSC``, ``VIDEO_MODE_SECAM`` and -``VIDEO_MODE_AUTO`` (3). Namely N/PAL Argentina, M/PAL, N/PAL, and NTSC -Japan with numbers 3-6 (sic). - -The ``VIDEO_TUNER_STEREO_ON`` flag indicating stereo reception became -``V4L2_TUNER_SUB_STEREO`` in field ``rxsubchans``. This field also -permits the detection of monaural and bilingual audio, see the -definition of struct :c:type:`v4l2_tuner` for details. -Presently no replacement exists for the ``VIDEO_TUNER_RDS_ON`` and -``VIDEO_TUNER_MBS_ON`` flags. - -The ``VIDEO_TUNER_LOW`` flag was renamed to ``V4L2_TUNER_CAP_LOW`` in -the struct :c:type:`v4l2_tuner` ``capability`` field. - -The ``VIDIOCGFREQ`` and ``VIDIOCSFREQ`` ioctl to change the tuner -frequency where renamed to -:ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` and -:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>`. They take a pointer -to a struct :c:type:`v4l2_frequency` instead of an -unsigned long integer. - - -.. _v4l-image-properties: - -Image Properties -================ - -V4L2 has no equivalent of the ``VIDIOCGPICT`` and ``VIDIOCSPICT`` ioctl -and struct ``video_picture``. The following fields where -replaced by V4L2 controls accessible with the -:ref:`VIDIOC_QUERYCTRL`, -:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and -:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls: - - - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - struct ``video_picture`` - - V4L2 Control ID - * - ``brightness`` - - ``V4L2_CID_BRIGHTNESS`` - * - ``hue`` - - ``V4L2_CID_HUE`` - * - ``colour`` - - ``V4L2_CID_SATURATION`` - * - ``contrast`` - - ``V4L2_CID_CONTRAST`` - * - ``whiteness`` - - ``V4L2_CID_WHITENESS`` - - -The V4L picture controls are assumed to range from 0 to 65535 with no -particular reset value. The V4L2 API permits arbitrary limits and -defaults which can be queried with the -:ref:`VIDIOC_QUERYCTRL` ioctl. For general -information about controls see :ref:`control`. - -The ``depth`` (average number of bits per pixel) of a video image is -implied by the selected image format. V4L2 does not explicitly provide -such information assuming applications recognizing the format are aware -of the image depth and others need not know. The ``palette`` field moved -into the struct :c:type:`v4l2_pix_format`: - - - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - struct ``video_picture`` ``palette`` - - struct :c:type:`v4l2_pix_format` ``pixfmt`` - * - ``VIDEO_PALETTE_GREY`` - - :ref:`V4L2_PIX_FMT_GREY <V4L2-PIX-FMT-GREY>` - * - ``VIDEO_PALETTE_HI240`` - - :ref:`V4L2_PIX_FMT_HI240 <pixfmt-reserved>` [#f3]_ - * - ``VIDEO_PALETTE_RGB565`` - - :ref:`V4L2_PIX_FMT_RGB565 <pixfmt-rgb>` - * - ``VIDEO_PALETTE_RGB555`` - - :ref:`V4L2_PIX_FMT_RGB555 <pixfmt-rgb>` - * - ``VIDEO_PALETTE_RGB24`` - - :ref:`V4L2_PIX_FMT_BGR24 <pixfmt-rgb>` - * - ``VIDEO_PALETTE_RGB32`` - - :ref:`V4L2_PIX_FMT_BGR32 <pixfmt-rgb>` [#f4]_ - * - ``VIDEO_PALETTE_YUV422`` - - :ref:`V4L2_PIX_FMT_YUYV <V4L2-PIX-FMT-YUYV>` - * - ``VIDEO_PALETTE_YUYV``\ [#f5]_ - - :ref:`V4L2_PIX_FMT_YUYV <V4L2-PIX-FMT-YUYV>` - * - ``VIDEO_PALETTE_UYVY`` - - :ref:`V4L2_PIX_FMT_UYVY <V4L2-PIX-FMT-UYVY>` - * - ``VIDEO_PALETTE_YUV420`` - - None - * - ``VIDEO_PALETTE_YUV411`` - - :ref:`V4L2_PIX_FMT_Y41P <V4L2-PIX-FMT-Y41P>` [#f6]_ - * - ``VIDEO_PALETTE_RAW`` - - None [#f7]_ - * - ``VIDEO_PALETTE_YUV422P`` - - :ref:`V4L2_PIX_FMT_YUV422P <V4L2-PIX-FMT-YUV422P>` - * - ``VIDEO_PALETTE_YUV411P`` - - :ref:`V4L2_PIX_FMT_YUV411P <V4L2-PIX-FMT-YUV411P>` [#f8]_ - * - ``VIDEO_PALETTE_YUV420P`` - - :ref:`V4L2_PIX_FMT_YVU420 <V4L2-PIX-FMT-YVU420>` - * - ``VIDEO_PALETTE_YUV410P`` - - :ref:`V4L2_PIX_FMT_YVU410 <V4L2-PIX-FMT-YVU410>` - - -V4L2 image formats are defined in :ref:`pixfmt`. The image format can -be selected with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. - - -Audio -===== - -The ``VIDIOCGAUDIO`` and ``VIDIOCSAUDIO`` ioctl and struct -``video_audio`` are used to enumerate the audio inputs -of a V4L device. The equivalent V4L2 ioctls are -:ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` and -:ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` using struct -:c:type:`v4l2_audio` as discussed in :ref:`audio`. - -The ``audio`` "channel number" field counting audio inputs was renamed -to ``index``. - -On ``VIDIOCSAUDIO`` the ``mode`` field selects *one* of the -``VIDEO_SOUND_MONO``, ``VIDEO_SOUND_STEREO``, ``VIDEO_SOUND_LANG1`` or -``VIDEO_SOUND_LANG2`` audio demodulation modes. When the current audio -standard is BTSC ``VIDEO_SOUND_LANG2`` refers to SAP and -``VIDEO_SOUND_LANG1`` is meaningless. Also undocumented in the V4L -specification, there is no way to query the selected mode. On -``VIDIOCGAUDIO`` the driver returns the *actually received* audio -programmes in this field. In the V4L2 API this information is stored in -the struct :c:type:`v4l2_tuner` ``rxsubchans`` and -``audmode`` fields, respectively. See :ref:`tuner` for more -information on tuners. Related to audio modes struct -:c:type:`v4l2_audio` also reports if this is a mono or -stereo input, regardless if the source is a tuner. - -The following fields where replaced by V4L2 controls accessible with the -:ref:`VIDIOC_QUERYCTRL`, -:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and -:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls: - - - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - struct ``video_audio`` - - V4L2 Control ID - * - ``volume`` - - ``V4L2_CID_AUDIO_VOLUME`` - * - ``bass`` - - ``V4L2_CID_AUDIO_BASS`` - * - ``treble`` - - ``V4L2_CID_AUDIO_TREBLE`` - * - ``balance`` - - ``V4L2_CID_AUDIO_BALANCE`` - - -To determine which of these controls are supported by a driver V4L -provides the ``flags`` ``VIDEO_AUDIO_VOLUME``, ``VIDEO_AUDIO_BASS``, -``VIDEO_AUDIO_TREBLE`` and ``VIDEO_AUDIO_BALANCE``. In the V4L2 API the -:ref:`VIDIOC_QUERYCTRL` ioctl reports if the -respective control is supported. Accordingly the ``VIDEO_AUDIO_MUTABLE`` -and ``VIDEO_AUDIO_MUTE`` flags where replaced by the boolean -``V4L2_CID_AUDIO_MUTE`` control. - -All V4L2 controls have a ``step`` attribute replacing the struct -``video_audio`` ``step`` field. The V4L audio controls -are assumed to range from 0 to 65535 with no particular reset value. The -V4L2 API permits arbitrary limits and defaults which can be queried with -the :ref:`VIDIOC_QUERYCTRL` ioctl. For general -information about controls see :ref:`control`. - - -Frame Buffer Overlay -==================== - -The V4L2 ioctls equivalent to ``VIDIOCGFBUF`` and ``VIDIOCSFBUF`` are -:ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and -:ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`. The ``base`` field of struct -``video_buffer`` remained unchanged, except V4L2 defines -a flag to indicate non-destructive overlays instead of a ``NULL`` -pointer. All other fields moved into the struct -:c:type:`v4l2_pix_format` ``fmt`` substructure of -struct :c:type:`v4l2_framebuffer`. The ``depth`` -field was replaced by ``pixelformat``. See :ref:`pixfmt-rgb` for a -list of RGB formats and their respective color depths. - -Instead of the special ioctls ``VIDIOCGWIN`` and ``VIDIOCSWIN`` V4L2 -uses the general-purpose data format negotiation ioctls -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. They take a pointer to a struct -:c:type:`v4l2_format` as argument. Here the ``win`` member -of the ``fmt`` union is used, a struct -:c:type:`v4l2_window`. - -The ``x``, ``y``, ``width`` and ``height`` fields of struct -``video_window`` moved into struct -:c:type:`v4l2_rect` substructure ``w`` of struct -:c:type:`v4l2_window`. The ``chromakey``, ``clips``, and -``clipcount`` fields remained unchanged. Struct -``video_clip`` was renamed to struct -:c:type:`v4l2_clip`, also containing a struct -:c:type:`v4l2_rect`, but the semantics are still the same. - -The ``VIDEO_WINDOW_INTERLACE`` flag was dropped. Instead applications -must set the ``field`` field to ``V4L2_FIELD_ANY`` or -``V4L2_FIELD_INTERLACED``. The ``VIDEO_WINDOW_CHROMAKEY`` flag moved -into struct :c:type:`v4l2_framebuffer`, under the new -name ``V4L2_FBUF_FLAG_CHROMAKEY``. - -In V4L, storing a bitmap pointer in ``clips`` and setting ``clipcount`` -to ``VIDEO_CLIP_BITMAP`` (-1) requests bitmap clipping, using a fixed -size bitmap of 1024 × 625 bits. Struct :c:type:`v4l2_window` -has a separate ``bitmap`` pointer field for this purpose and the bitmap -size is determined by ``w.width`` and ``w.height``. - -The ``VIDIOCCAPTURE`` ioctl to enable or disable overlay was renamed to -:ref:`VIDIOC_OVERLAY`. - - -Cropping -======== - -To capture only a subsection of the full picture V4L defines the -``VIDIOCGCAPTURE`` and ``VIDIOCSCAPTURE`` ioctls using struct -``video_capture``. The equivalent V4L2 ioctls are -:ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and -:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` using struct -:c:type:`v4l2_crop`, and the related -:ref:`VIDIOC_CROPCAP` ioctl. This is a rather -complex matter, see :ref:`crop` for details. - -The ``x``, ``y``, ``width`` and ``height`` fields moved into struct -:c:type:`v4l2_rect` substructure ``c`` of struct -:c:type:`v4l2_crop`. The ``decimation`` field was dropped. In -the V4L2 API the scaling factor is implied by the size of the cropping -rectangle and the size of the captured or overlaid image. - -The ``VIDEO_CAPTURE_ODD`` and ``VIDEO_CAPTURE_EVEN`` flags to capture -only the odd or even field, respectively, were replaced by -``V4L2_FIELD_TOP`` and ``V4L2_FIELD_BOTTOM`` in the field named -``field`` of struct :c:type:`v4l2_pix_format` and -struct :c:type:`v4l2_window`. These structures are used to -select a capture or overlay format with the -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. - - -Reading Images, Memory Mapping -============================== - - -Capturing using the read method -------------------------------- - -There is no essential difference between reading images from a V4L or -V4L2 device using the :ref:`read() <func-read>` function, however V4L2 -drivers are not required to support this I/O method. Applications can -determine if the function is available with the -:ref:`VIDIOC_QUERYCAP` ioctl. All V4L2 devices -exchanging data with applications must support the -:ref:`select() <func-select>` and :ref:`poll() <func-poll>` -functions. - -To select an image format and size, V4L provides the ``VIDIOCSPICT`` and -``VIDIOCSWIN`` ioctls. V4L2 uses the general-purpose data format -negotiation ioctls :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. They take a pointer to a struct -:c:type:`v4l2_format` as argument, here the struct -:c:type:`v4l2_pix_format` named ``pix`` of its -``fmt`` union is used. - -For more information about the V4L2 read interface see :ref:`rw`. - - -Capturing using memory mapping ------------------------------- - -Applications can read from V4L devices by mapping buffers in device -memory, or more often just buffers allocated in DMA-able system memory, -into their address space. This avoids the data copying overhead of the -read method. V4L2 supports memory mapping as well, with a few -differences. - - - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - V4L - - V4L2 - * - - - The image format must be selected before buffers are allocated, - with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. When no - format is selected the driver may use the last, possibly by - another application requested format. - * - Applications cannot change the number of buffers. The it is built - into the driver, unless it has a module option to change the - number when the driver module is loaded. - - The :ref:`VIDIOC_REQBUFS` ioctl allocates the - desired number of buffers, this is a required step in the - initialization sequence. - * - Drivers map all buffers as one contiguous range of memory. The - ``VIDIOCGMBUF`` ioctl is available to query the number of buffers, - the offset of each buffer from the start of the virtual file, and - the overall amount of memory used, which can be used as arguments - for the :ref:`mmap() <func-mmap>` function. - - Buffers are individually mapped. The offset and size of each - buffer can be determined with the - :ref:`VIDIOC_QUERYBUF` ioctl. - * - The ``VIDIOCMCAPTURE`` ioctl prepares a buffer for capturing. It - also determines the image format for this buffer. The ioctl - returns immediately, eventually with an ``EAGAIN`` error code if no - video signal had been detected. When the driver supports more than - one buffer applications can call the ioctl multiple times and thus - have multiple outstanding capture requests. - - The ``VIDIOCSYNC`` ioctl suspends execution until a particular - buffer has been filled. - - Drivers maintain an incoming and outgoing queue. - :ref:`VIDIOC_QBUF` enqueues any empty buffer into - the incoming queue. Filled buffers are dequeued from the outgoing - queue with the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. To wait - until filled buffers become available this function, - :ref:`select() <func-select>` or :ref:`poll() <func-poll>` can - be used. The :ref:`VIDIOC_STREAMON` ioctl - must be called once after enqueuing one or more buffers to start - capturing. Its counterpart - :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` stops capturing and - dequeues all buffers from both queues. Applications can query the - signal status, if known, with the - :ref:`VIDIOC_ENUMINPUT` ioctl. - - -For a more in-depth discussion of memory mapping and examples, see -:ref:`mmap`. - - -Reading Raw VBI Data -==================== - -Originally the V4L API did not specify a raw VBI capture interface, only -the device file ``/dev/vbi`` was reserved for this purpose. The only -driver supporting this interface was the BTTV driver, de-facto defining -the V4L VBI interface. Reading from the device yields a raw VBI image -with the following parameters: - - - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - struct :c:type:`v4l2_vbi_format` - - V4L, BTTV driver - * - sampling_rate - - 28636363 Hz NTSC (or any other 525-line standard); 35468950 Hz PAL - and SECAM (625-line standards) - * - offset - - ? - * - samples_per_line - - 2048 - * - sample_format - - V4L2_PIX_FMT_GREY. The last four bytes (a machine endianness - integer) contain a frame counter. - * - start[] - - 10, 273 NTSC; 22, 335 PAL and SECAM - * - count[] - - 16, 16 [#f9]_ - * - flags - - 0 - - -Undocumented in the V4L specification, in Linux 2.3 the -``VIDIOCGVBIFMT`` and ``VIDIOCSVBIFMT`` ioctls using struct -``vbi_format`` were added to determine the VBI image -parameters. These ioctls are only partially compatible with the V4L2 VBI -interface specified in :ref:`raw-vbi`. - -An ``offset`` field does not exist, ``sample_format`` is supposed to be -``VIDEO_PALETTE_RAW``, equivalent to ``V4L2_PIX_FMT_GREY``. The -remaining fields are probably equivalent to struct -:c:type:`v4l2_vbi_format`. - -Apparently only the Zoran (ZR 36120) driver implements these ioctls. The -semantics differ from those specified for V4L2 in two ways. The -parameters are reset on :ref:`open() <func-open>` and -``VIDIOCSVBIFMT`` always returns an ``EINVAL`` error code if the parameters -are invalid. - - -Miscellaneous -============= - -V4L2 has no equivalent of the ``VIDIOCGUNIT`` ioctl. Applications can -find the VBI device associated with a video capture device (or vice -versa) by reopening the device and requesting VBI data. For details see -:ref:`open`. - -No replacement exists for ``VIDIOCKEY``, and the V4L functions for -microcode programming. A new interface for MPEG compression and playback -devices is documented in :ref:`extended-controls`. - -.. [#f1] - According to Documentation/admin-guide/devices.rst these should be symbolic links - to ``/dev/video0``. Note the original bttv interface is not - compatible with V4L or V4L2. - -.. [#f2] - According to ``Documentation/admin-guide/devices.rst`` a symbolic link to - ``/dev/radio0``. - -.. [#f3] - This is a custom format used by the BTTV driver, not one of the V4L2 - standard formats. - -.. [#f4] - Presumably all V4L RGB formats are little-endian, although some - drivers might interpret them according to machine endianness. V4L2 - defines little-endian, big-endian and red/blue swapped variants. For - details see :ref:`pixfmt-rgb`. - -.. [#f5] - ``VIDEO_PALETTE_YUV422`` and ``VIDEO_PALETTE_YUYV`` are the same - formats. Some V4L drivers respond to one, some to the other. - -.. [#f6] - Not to be confused with ``V4L2_PIX_FMT_YUV411P``, which is a planar - format. - -.. [#f7] - V4L explains this as: "RAW capture (BT848)" - -.. [#f8] - Not to be confused with ``V4L2_PIX_FMT_Y41P``, which is a packed - format. - -.. [#f9] - Old driver versions used different values, eventually the custom - ``BTTV_VBISIZE`` ioctl was added to query the correct values. diff --git a/Documentation/media/uapi/v4l/dmabuf.rst b/Documentation/media/uapi/v4l/dmabuf.rst deleted file mode 100644 index bb8fd943b14e..000000000000 --- a/Documentation/media/uapi/v4l/dmabuf.rst +++ /dev/null @@ -1,169 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dmabuf: - -************************************ -Streaming I/O (DMA buffer importing) -************************************ - -The DMABUF framework provides a generic method for sharing buffers -between multiple devices. Device drivers that support DMABUF can export -a DMA buffer to userspace as a file descriptor (known as the exporter -role), import a DMA buffer from userspace using a file descriptor -previously exported for a different or the same device (known as the -importer role), or both. This section describes the DMABUF importer role -API in V4L2. - -Refer to :ref:`DMABUF exporting <VIDIOC_EXPBUF>` for details about -exporting V4L2 buffers as DMABUF file descriptors. - -Input and output devices support the streaming I/O method when the -``V4L2_CAP_STREAMING`` flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP <VIDIOC_QUERYCAP>` ioctl is set. Whether -importing DMA buffers through DMABUF file descriptors is supported is -determined by calling the :ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>` -ioctl with the memory type set to ``V4L2_MEMORY_DMABUF``. - -This I/O method is dedicated to sharing DMA buffers between different -devices, which may be V4L devices or other video-related devices (e.g. -DRM). Buffers (planes) are allocated by a driver on behalf of an -application. Next, these buffers are exported to the application as file -descriptors using an API which is specific for an allocator driver. Only -such file descriptor are exchanged. The descriptors and meta-information -are passed in struct :c:type:`v4l2_buffer` (or in struct -:c:type:`v4l2_plane` in the multi-planar API case). The -driver must be switched into DMABUF I/O mode by calling the -:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>` with the desired buffer type. - - -Example: Initiating streaming I/O with DMABUF file descriptors -============================================================== - -.. code-block:: c - - struct v4l2_requestbuffers reqbuf; - - memset(&reqbuf, 0, sizeof (reqbuf)); - reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - reqbuf.memory = V4L2_MEMORY_DMABUF; - reqbuf.count = 1; - - if (ioctl(fd, VIDIOC_REQBUFS, &reqbuf) == -1) { - if (errno == EINVAL) - printf("Video capturing or DMABUF streaming is not supported\\n"); - else - perror("VIDIOC_REQBUFS"); - - exit(EXIT_FAILURE); - } - -The buffer (plane) file descriptor is passed on the fly with the -:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl. In case of multiplanar -buffers, every plane can be associated with a different DMABUF -descriptor. Although buffers are commonly cycled, applications can pass -a different DMABUF descriptor at each :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` call. - -Example: Queueing DMABUF using single plane API -=============================================== - -.. code-block:: c - - int buffer_queue(int v4lfd, int index, int dmafd) - { - struct v4l2_buffer buf; - - memset(&buf, 0, sizeof buf); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_DMABUF; - buf.index = index; - buf.m.fd = dmafd; - - if (ioctl(v4lfd, VIDIOC_QBUF, &buf) == -1) { - perror("VIDIOC_QBUF"); - return -1; - } - - return 0; - } - -Example 3.6. Queueing DMABUF using multi plane API -================================================== - -.. code-block:: c - - int buffer_queue_mp(int v4lfd, int index, int dmafd[], int n_planes) - { - struct v4l2_buffer buf; - struct v4l2_plane planes[VIDEO_MAX_PLANES]; - int i; - - memset(&buf, 0, sizeof buf); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; - buf.memory = V4L2_MEMORY_DMABUF; - buf.index = index; - buf.m.planes = planes; - buf.length = n_planes; - - memset(&planes, 0, sizeof planes); - - for (i = 0; i < n_planes; ++i) - buf.m.planes[i].m.fd = dmafd[i]; - - if (ioctl(v4lfd, VIDIOC_QBUF, &buf) == -1) { - perror("VIDIOC_QBUF"); - return -1; - } - - return 0; - } - -Captured or displayed buffers are dequeued with the -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. The driver can unlock the -buffer at any time between the completion of the DMA and this ioctl. The -memory is also unlocked when -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` is called, -:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, or when the device is closed. - -For capturing applications it is customary to enqueue a number of empty -buffers, to start capturing and enter the read loop. Here the -application waits until a filled buffer can be dequeued, and re-enqueues -the buffer when the data is no longer needed. Output applications fill -and enqueue buffers, when enough buffers are stacked up output is -started. In the write loop, when the application runs out of free -buffers it must wait until an empty buffer can be dequeued and reused. -Two methods exist to suspend execution of the application until one or -more buffers can be dequeued. By default :ref:`VIDIOC_DQBUF -<VIDIOC_QBUF>` blocks when no buffer is in the outgoing queue. When the -``O_NONBLOCK`` flag was given to the :ref:`open() <func-open>` function, -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN`` -error code when no buffer is available. The -:ref:`select() <func-select>` and :ref:`poll() <func-poll>` -functions are always available. - -To start and stop capturing or displaying applications call the -:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls. - -.. note:: - - :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` removes all buffers from - both queues and unlocks all buffers as a side effect. Since there is no - notion of doing anything "now" on a multitasking system, if an - application needs to synchronize with another event it should examine - the struct :c:type:`v4l2_buffer` ``timestamp`` of captured or - outputted buffers. - -Drivers implementing DMABUF importing I/O must support the -:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON -<VIDIOC_STREAMON>` and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, -and the :ref:`select() <func-select>` and :ref:`poll() <func-poll>` -functions. diff --git a/Documentation/media/uapi/v4l/dv-timings.rst b/Documentation/media/uapi/v4l/dv-timings.rst deleted file mode 100644 index b3c69ca559e2..000000000000 --- a/Documentation/media/uapi/v4l/dv-timings.rst +++ /dev/null @@ -1,45 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dv-timings: - -************************** -Digital Video (DV) Timings -************************** - -The video standards discussed so far have been dealing with Analog TV -and the corresponding video timings. Today there are many more different -hardware interfaces such as High Definition TV interfaces (HDMI), VGA, -DVI connectors etc., that carry video signals and there is a need to -extend the API to select the video timings for these interfaces. Since -it is not possible to extend the :ref:`v4l2_std_id <v4l2-std-id>` -due to the limited bits available, a new set of ioctls was added to -set/get video timings at the input and output. - -These ioctls deal with the detailed digital video timings that define -each video format. This includes parameters such as the active video -width and height, signal polarities, frontporches, backporches, sync -widths etc. The ``linux/v4l2-dv-timings.h`` header can be used to get -the timings of the formats in the :ref:`cea861` and :ref:`vesadmt` -standards. - -To enumerate and query the attributes of the DV timings supported by a -device applications use the -:ref:`VIDIOC_ENUM_DV_TIMINGS` and -:ref:`VIDIOC_DV_TIMINGS_CAP` ioctls. To set -DV timings for the device applications use the -:ref:`VIDIOC_S_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl and to get -current DV timings they use the -:ref:`VIDIOC_G_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl. To detect -the DV timings as seen by the video receiver applications use the -:ref:`VIDIOC_QUERY_DV_TIMINGS` ioctl. - -Applications can make use of the :ref:`input-capabilities` and -:ref:`output-capabilities` flags to determine whether the digital -video ioctls can be used with the given input or output. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-camera.rst b/Documentation/media/uapi/v4l/ext-ctrls-camera.rst deleted file mode 100644 index 51c1d5c9eb00..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-camera.rst +++ /dev/null @@ -1,515 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _camera-controls: - -************************ -Camera Control Reference -************************ - -The Camera class includes controls for mechanical (or equivalent -digital) features of a device such as controllable lenses or sensors. - - -.. _camera-control-id: - -Camera Control IDs -================== - -``V4L2_CID_CAMERA_CLASS (class)`` - The Camera class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. - -.. _v4l2-exposure-auto-type: - -``V4L2_CID_EXPOSURE_AUTO`` - (enum) - -enum v4l2_exposure_auto_type - - Enables automatic adjustments of the exposure time and/or iris - aperture. The effect of manual changes of the exposure time or iris - aperture while these features are enabled is undefined, drivers - should ignore such requests. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_EXPOSURE_AUTO`` - - Automatic exposure time, automatic iris aperture. - * - ``V4L2_EXPOSURE_MANUAL`` - - Manual exposure time, manual iris. - * - ``V4L2_EXPOSURE_SHUTTER_PRIORITY`` - - Manual exposure time, auto iris. - * - ``V4L2_EXPOSURE_APERTURE_PRIORITY`` - - Auto exposure time, manual iris. - - - -``V4L2_CID_EXPOSURE_ABSOLUTE (integer)`` - Determines the exposure time of the camera sensor. The exposure time - is limited by the frame interval. Drivers should interpret the - values as 100 µs units, where the value 1 stands for 1/10000th of a - second, 10000 for 1 second and 100000 for 10 seconds. - -``V4L2_CID_EXPOSURE_AUTO_PRIORITY (boolean)`` - When ``V4L2_CID_EXPOSURE_AUTO`` is set to ``AUTO`` or - ``APERTURE_PRIORITY``, this control determines if the device may - dynamically vary the frame rate. By default this feature is disabled - (0) and the frame rate must remain constant. - -``V4L2_CID_AUTO_EXPOSURE_BIAS (integer menu)`` - Determines the automatic exposure compensation, it is effective only - when ``V4L2_CID_EXPOSURE_AUTO`` control is set to ``AUTO``, - ``SHUTTER_PRIORITY`` or ``APERTURE_PRIORITY``. It is expressed in - terms of EV, drivers should interpret the values as 0.001 EV units, - where the value 1000 stands for +1 EV. - - Increasing the exposure compensation value is equivalent to - decreasing the exposure value (EV) and will increase the amount of - light at the image sensor. The camera performs the exposure - compensation by adjusting absolute exposure time and/or aperture. - -.. _v4l2-exposure-metering: - -``V4L2_CID_EXPOSURE_METERING`` - (enum) - -enum v4l2_exposure_metering - - Determines how the camera measures the amount of light available for - the frame exposure. Possible values are: - -.. tabularcolumns:: |p{8.7cm}|p{8.8cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_EXPOSURE_METERING_AVERAGE`` - - Use the light information coming from the entire frame and average - giving no weighting to any particular portion of the metered area. - * - ``V4L2_EXPOSURE_METERING_CENTER_WEIGHTED`` - - Average the light information coming from the entire frame giving - priority to the center of the metered area. - * - ``V4L2_EXPOSURE_METERING_SPOT`` - - Measure only very small area at the center of the frame. - * - ``V4L2_EXPOSURE_METERING_MATRIX`` - - A multi-zone metering. The light intensity is measured in several - points of the frame and the results are combined. The algorithm of - the zones selection and their significance in calculating the - final value is device dependent. - - - -``V4L2_CID_PAN_RELATIVE (integer)`` - This control turns the camera horizontally by the specified amount. - The unit is undefined. A positive value moves the camera to the - right (clockwise when viewed from above), a negative value to the - left. A value of zero does not cause motion. This is a write-only - control. - -``V4L2_CID_TILT_RELATIVE (integer)`` - This control turns the camera vertically by the specified amount. - The unit is undefined. A positive value moves the camera up, a - negative value down. A value of zero does not cause motion. This is - a write-only control. - -``V4L2_CID_PAN_RESET (button)`` - When this control is set, the camera moves horizontally to the - default position. - -``V4L2_CID_TILT_RESET (button)`` - When this control is set, the camera moves vertically to the default - position. - -``V4L2_CID_PAN_ABSOLUTE (integer)`` - This control turns the camera horizontally to the specified - position. Positive values move the camera to the right (clockwise - when viewed from above), negative values to the left. Drivers should - interpret the values as arc seconds, with valid values between -180 - * 3600 and +180 * 3600 inclusive. - -``V4L2_CID_TILT_ABSOLUTE (integer)`` - This control turns the camera vertically to the specified position. - Positive values move the camera up, negative values down. Drivers - should interpret the values as arc seconds, with valid values - between -180 * 3600 and +180 * 3600 inclusive. - -``V4L2_CID_FOCUS_ABSOLUTE (integer)`` - This control sets the focal point of the camera to the specified - position. The unit is undefined. Positive values set the focus - closer to the camera, negative values towards infinity. - -``V4L2_CID_FOCUS_RELATIVE (integer)`` - This control moves the focal point of the camera by the specified - amount. The unit is undefined. Positive values move the focus closer - to the camera, negative values towards infinity. This is a - write-only control. - -``V4L2_CID_FOCUS_AUTO (boolean)`` - Enables continuous automatic focus adjustments. The effect of manual - focus adjustments while this feature is enabled is undefined, - drivers should ignore such requests. - -``V4L2_CID_AUTO_FOCUS_START (button)`` - Starts single auto focus process. The effect of setting this control - when ``V4L2_CID_FOCUS_AUTO`` is set to ``TRUE`` (1) is undefined, - drivers should ignore such requests. - -``V4L2_CID_AUTO_FOCUS_STOP (button)`` - Aborts automatic focusing started with ``V4L2_CID_AUTO_FOCUS_START`` - control. It is effective only when the continuous autofocus is - disabled, that is when ``V4L2_CID_FOCUS_AUTO`` control is set to - ``FALSE`` (0). - -.. _v4l2-auto-focus-status: - -``V4L2_CID_AUTO_FOCUS_STATUS (bitmask)`` - The automatic focus status. This is a read-only control. - - Setting ``V4L2_LOCK_FOCUS`` lock bit of the ``V4L2_CID_3A_LOCK`` - control may stop updates of the ``V4L2_CID_AUTO_FOCUS_STATUS`` - control value. - -.. tabularcolumns:: |p{6.7cm}|p{10.8cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_AUTO_FOCUS_STATUS_IDLE`` - - Automatic focus is not active. - * - ``V4L2_AUTO_FOCUS_STATUS_BUSY`` - - Automatic focusing is in progress. - * - ``V4L2_AUTO_FOCUS_STATUS_REACHED`` - - Focus has been reached. - * - ``V4L2_AUTO_FOCUS_STATUS_FAILED`` - - Automatic focus has failed, the driver will not transition from - this state until another action is performed by an application. - - - -.. _v4l2-auto-focus-range: - -``V4L2_CID_AUTO_FOCUS_RANGE`` - (enum) - -enum v4l2_auto_focus_range - - Determines auto focus distance range for which lens may be adjusted. - -.. tabularcolumns:: |p{6.8cm}|p{10.7cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_AUTO_FOCUS_RANGE_AUTO`` - - The camera automatically selects the focus range. - * - ``V4L2_AUTO_FOCUS_RANGE_NORMAL`` - - Normal distance range, limited for best automatic focus - performance. - * - ``V4L2_AUTO_FOCUS_RANGE_MACRO`` - - Macro (close-up) auto focus. The camera will use its minimum - possible distance for auto focus. - * - ``V4L2_AUTO_FOCUS_RANGE_INFINITY`` - - The lens is set to focus on an object at infinite distance. - - - -``V4L2_CID_ZOOM_ABSOLUTE (integer)`` - Specify the objective lens focal length as an absolute value. The - zoom unit is driver-specific and its value should be a positive - integer. - -``V4L2_CID_ZOOM_RELATIVE (integer)`` - Specify the objective lens focal length relatively to the current - value. Positive values move the zoom lens group towards the - telephoto direction, negative values towards the wide-angle - direction. The zoom unit is driver-specific. This is a write-only - control. - -``V4L2_CID_ZOOM_CONTINUOUS (integer)`` - Move the objective lens group at the specified speed until it - reaches physical device limits or until an explicit request to stop - the movement. A positive value moves the zoom lens group towards the - telephoto direction. A value of zero stops the zoom lens group - movement. A negative value moves the zoom lens group towards the - wide-angle direction. The zoom speed unit is driver-specific. - -``V4L2_CID_IRIS_ABSOLUTE (integer)`` - This control sets the camera's aperture to the specified value. The - unit is undefined. Larger values open the iris wider, smaller values - close it. - -``V4L2_CID_IRIS_RELATIVE (integer)`` - This control modifies the camera's aperture by the specified amount. - The unit is undefined. Positive values open the iris one step - further, negative values close it one step further. This is a - write-only control. - -``V4L2_CID_PRIVACY (boolean)`` - Prevent video from being acquired by the camera. When this control - is set to ``TRUE`` (1), no image can be captured by the camera. - Common means to enforce privacy are mechanical obturation of the - sensor and firmware image processing, but the device is not - restricted to these methods. Devices that implement the privacy - control must support read access and may support write access. - -``V4L2_CID_BAND_STOP_FILTER (integer)`` - Switch the band-stop filter of a camera sensor on or off, or specify - its strength. Such band-stop filters can be used, for example, to - filter out the fluorescent light component. - -.. _v4l2-auto-n-preset-white-balance: - -``V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE`` - (enum) - -enum v4l2_auto_n_preset_white_balance - - Sets white balance to automatic, manual or a preset. The presets - determine color temperature of the light as a hint to the camera for - white balance adjustments resulting in most accurate color - representation. The following white balance presets are listed in - order of increasing color temperature. - -.. tabularcolumns:: |p{7.2 cm}|p{10.3cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_WHITE_BALANCE_MANUAL`` - - Manual white balance. - * - ``V4L2_WHITE_BALANCE_AUTO`` - - Automatic white balance adjustments. - * - ``V4L2_WHITE_BALANCE_INCANDESCENT`` - - White balance setting for incandescent (tungsten) lighting. It - generally cools down the colors and corresponds approximately to - 2500...3500 K color temperature range. - * - ``V4L2_WHITE_BALANCE_FLUORESCENT`` - - White balance preset for fluorescent lighting. It corresponds - approximately to 4000...5000 K color temperature. - * - ``V4L2_WHITE_BALANCE_FLUORESCENT_H`` - - With this setting the camera will compensate for fluorescent H - lighting. - * - ``V4L2_WHITE_BALANCE_HORIZON`` - - White balance setting for horizon daylight. It corresponds - approximately to 5000 K color temperature. - * - ``V4L2_WHITE_BALANCE_DAYLIGHT`` - - White balance preset for daylight (with clear sky). It corresponds - approximately to 5000...6500 K color temperature. - * - ``V4L2_WHITE_BALANCE_FLASH`` - - With this setting the camera will compensate for the flash light. - It slightly warms up the colors and corresponds roughly to - 5000...5500 K color temperature. - * - ``V4L2_WHITE_BALANCE_CLOUDY`` - - White balance preset for moderately overcast sky. This option - corresponds approximately to 6500...8000 K color temperature - range. - * - ``V4L2_WHITE_BALANCE_SHADE`` - - White balance preset for shade or heavily overcast sky. It - corresponds approximately to 9000...10000 K color temperature. - - - -.. _v4l2-wide-dynamic-range: - -``V4L2_CID_WIDE_DYNAMIC_RANGE (boolean)`` - Enables or disables the camera's wide dynamic range feature. This - feature allows to obtain clear images in situations where intensity - of the illumination varies significantly throughout the scene, i.e. - there are simultaneously very dark and very bright areas. It is most - commonly realized in cameras by combining two subsequent frames with - different exposure times. [#f1]_ - -.. _v4l2-image-stabilization: - -``V4L2_CID_IMAGE_STABILIZATION (boolean)`` - Enables or disables image stabilization. - -``V4L2_CID_ISO_SENSITIVITY (integer menu)`` - Determines ISO equivalent of an image sensor indicating the sensor's - sensitivity to light. The numbers are expressed in arithmetic scale, - as per :ref:`iso12232` standard, where doubling the sensor - sensitivity is represented by doubling the numerical ISO value. - Applications should interpret the values as standard ISO values - multiplied by 1000, e.g. control value 800 stands for ISO 0.8. - Drivers will usually support only a subset of standard ISO values. - The effect of setting this control while the - ``V4L2_CID_ISO_SENSITIVITY_AUTO`` control is set to a value other - than ``V4L2_CID_ISO_SENSITIVITY_MANUAL`` is undefined, drivers - should ignore such requests. - -.. _v4l2-iso-sensitivity-auto-type: - -``V4L2_CID_ISO_SENSITIVITY_AUTO`` - (enum) - -enum v4l2_iso_sensitivity_type - - Enables or disables automatic ISO sensitivity adjustments. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_CID_ISO_SENSITIVITY_MANUAL`` - - Manual ISO sensitivity. - * - ``V4L2_CID_ISO_SENSITIVITY_AUTO`` - - Automatic ISO sensitivity adjustments. - - - -.. _v4l2-scene-mode: - -``V4L2_CID_SCENE_MODE`` - (enum) - -enum v4l2_scene_mode - - This control allows to select scene programs as the camera automatic - modes optimized for common shooting scenes. Within these modes the - camera determines best exposure, aperture, focusing, light metering, - white balance and equivalent sensitivity. The controls of those - parameters are influenced by the scene mode control. An exact - behavior in each mode is subject to the camera specification. - - When the scene mode feature is not used, this control should be set - to ``V4L2_SCENE_MODE_NONE`` to make sure the other possibly related - controls are accessible. The following scene programs are defined: - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{5.9cm}|p{11.5cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_SCENE_MODE_NONE`` - - The scene mode feature is disabled. - * - ``V4L2_SCENE_MODE_BACKLIGHT`` - - Backlight. Compensates for dark shadows when light is coming from - behind a subject, also by automatically turning on the flash. - * - ``V4L2_SCENE_MODE_BEACH_SNOW`` - - Beach and snow. This mode compensates for all-white or bright - scenes, which tend to look gray and low contrast, when camera's - automatic exposure is based on an average scene brightness. To - compensate, this mode automatically slightly overexposes the - frames. The white balance may also be adjusted to compensate for - the fact that reflected snow looks bluish rather than white. - * - ``V4L2_SCENE_MODE_CANDLELIGHT`` - - Candle light. The camera generally raises the ISO sensitivity and - lowers the shutter speed. This mode compensates for relatively - close subject in the scene. The flash is disabled in order to - preserve the ambiance of the light. - * - ``V4L2_SCENE_MODE_DAWN_DUSK`` - - Dawn and dusk. Preserves the colors seen in low natural light - before dusk and after down. The camera may turn off the flash, and - automatically focus at infinity. It will usually boost saturation - and lower the shutter speed. - * - ``V4L2_SCENE_MODE_FALL_COLORS`` - - Fall colors. Increases saturation and adjusts white balance for - color enhancement. Pictures of autumn leaves get saturated reds - and yellows. - * - ``V4L2_SCENE_MODE_FIREWORKS`` - - Fireworks. Long exposure times are used to capture the expanding - burst of light from a firework. The camera may invoke image - stabilization. - * - ``V4L2_SCENE_MODE_LANDSCAPE`` - - Landscape. The camera may choose a small aperture to provide deep - depth of field and long exposure duration to help capture detail - in dim light conditions. The focus is fixed at infinity. Suitable - for distant and wide scenery. - * - ``V4L2_SCENE_MODE_NIGHT`` - - Night, also known as Night Landscape. Designed for low light - conditions, it preserves detail in the dark areas without blowing - out bright objects. The camera generally sets itself to a - medium-to-high ISO sensitivity, with a relatively long exposure - time, and turns flash off. As such, there will be increased image - noise and the possibility of blurred image. - * - ``V4L2_SCENE_MODE_PARTY_INDOOR`` - - Party and indoor. Designed to capture indoor scenes that are lit - by indoor background lighting as well as the flash. The camera - usually increases ISO sensitivity, and adjusts exposure for the - low light conditions. - * - ``V4L2_SCENE_MODE_PORTRAIT`` - - Portrait. The camera adjusts the aperture so that the depth of - field is reduced, which helps to isolate the subject against a - smooth background. Most cameras recognize the presence of faces in - the scene and focus on them. The color hue is adjusted to enhance - skin tones. The intensity of the flash is often reduced. - * - ``V4L2_SCENE_MODE_SPORTS`` - - Sports. Significantly increases ISO and uses a fast shutter speed - to freeze motion of rapidly-moving subjects. Increased image noise - may be seen in this mode. - * - ``V4L2_SCENE_MODE_SUNSET`` - - Sunset. Preserves deep hues seen in sunsets and sunrises. It bumps - up the saturation. - * - ``V4L2_SCENE_MODE_TEXT`` - - Text. It applies extra contrast and sharpness, it is typically a - black-and-white mode optimized for readability. Automatic focus - may be switched to close-up mode and this setting may also involve - some lens-distortion correction. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_3A_LOCK (bitmask)`` - This control locks or unlocks the automatic focus, exposure and - white balance. The automatic adjustments can be paused independently - by setting the corresponding lock bit to 1. The camera then retains - the settings until the lock bit is cleared. The following lock bits - are defined: - - When a given algorithm is not enabled, drivers should ignore - requests to lock it and should return no error. An example might be - an application setting bit ``V4L2_LOCK_WHITE_BALANCE`` when the - ``V4L2_CID_AUTO_WHITE_BALANCE`` control is set to ``FALSE``. The - value of this control may be changed by exposure, white balance or - focus controls. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_LOCK_EXPOSURE`` - - Automatic exposure adjustments lock. - * - ``V4L2_LOCK_WHITE_BALANCE`` - - Automatic white balance adjustments lock. - * - ``V4L2_LOCK_FOCUS`` - - Automatic focus lock. - - - -``V4L2_CID_PAN_SPEED (integer)`` - This control turns the camera horizontally at the specific speed. - The unit is undefined. A positive value moves the camera to the - right (clockwise when viewed from above), a negative value to the - left. A value of zero stops the motion if one is in progress and has - no effect otherwise. - -``V4L2_CID_TILT_SPEED (integer)`` - This control turns the camera vertically at the specified speed. The - unit is undefined. A positive value moves the camera up, a negative - value down. A value of zero stops the motion if one is in progress - and has no effect otherwise. - -.. [#f1] - This control may be changed to a menu control in the future, if more - options are required. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst deleted file mode 100644 index d4fc5f25aa14..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst +++ /dev/null @@ -1,4264 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _mpeg-controls: - -*********************** -Codec Control Reference -*********************** - -Below all controls within the Codec control class are described. First -the generic controls, then controls specific for certain hardware. - -.. note:: - - These controls are applicable to all codecs and not just MPEG. The - defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG as the controls - were originally made for MPEG codecs and later extended to cover all - encoding formats. - - -Generic Codec Controls -====================== - - -.. _mpeg-control-id: - -Codec Control IDs ------------------ - -``V4L2_CID_MPEG_CLASS (class)`` - The Codec class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. This description can be - used as the caption of a Tab page in a GUI, for example. - -.. _v4l2-mpeg-stream-type: - -``V4L2_CID_MPEG_STREAM_TYPE`` - (enum) - -enum v4l2_mpeg_stream_type - - The MPEG-1, -2 or -4 output stream type. One cannot assume anything - here. Each hardware MPEG encoder tends to support different subsets - of the available MPEG stream types. This control is specific to - multiplexed MPEG streams. The currently defined stream types are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_PS`` - - MPEG-2 program stream - * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_TS`` - - MPEG-2 transport stream - * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_SS`` - - MPEG-1 system stream - * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_DVD`` - - MPEG-2 DVD-compatible stream - * - ``V4L2_MPEG_STREAM_TYPE_MPEG1_VCD`` - - MPEG-1 VCD-compatible stream - * - ``V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD`` - - MPEG-2 SVCD-compatible stream - - - -``V4L2_CID_MPEG_STREAM_PID_PMT (integer)`` - Program Map Table Packet ID for the MPEG transport stream (default - 16) - -``V4L2_CID_MPEG_STREAM_PID_AUDIO (integer)`` - Audio Packet ID for the MPEG transport stream (default 256) - -``V4L2_CID_MPEG_STREAM_PID_VIDEO (integer)`` - Video Packet ID for the MPEG transport stream (default 260) - -``V4L2_CID_MPEG_STREAM_PID_PCR (integer)`` - Packet ID for the MPEG transport stream carrying PCR fields (default - 259) - -``V4L2_CID_MPEG_STREAM_PES_ID_AUDIO (integer)`` - Audio ID for MPEG PES - -``V4L2_CID_MPEG_STREAM_PES_ID_VIDEO (integer)`` - Video ID for MPEG PES - -.. _v4l2-mpeg-stream-vbi-fmt: - -``V4L2_CID_MPEG_STREAM_VBI_FMT`` - (enum) - -enum v4l2_mpeg_stream_vbi_fmt - - Some cards can embed VBI data (e. g. Closed Caption, Teletext) into - the MPEG stream. This control selects whether VBI data should be - embedded, and if so, what embedding method should be used. The list - of possible VBI formats depends on the driver. The currently defined - VBI format types are: - - - -.. tabularcolumns:: |p{6.6 cm}|p{10.9cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_STREAM_VBI_FMT_NONE`` - - No VBI in the MPEG stream - * - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV`` - - VBI in private packets, IVTV format (documented in the kernel - sources in the file - ``Documentation/media/v4l-drivers/cx2341x.rst``) - - - -.. _v4l2-mpeg-audio-sampling-freq: - -``V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ`` - (enum) - -enum v4l2_mpeg_audio_sampling_freq - - MPEG Audio sampling frequency. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100`` - - 44.1 kHz - * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000`` - - 48 kHz - * - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000`` - - 32 kHz - - - -.. _v4l2-mpeg-audio-encoding: - -``V4L2_CID_MPEG_AUDIO_ENCODING`` - (enum) - -enum v4l2_mpeg_audio_encoding - - MPEG Audio encoding. This control is specific to multiplexed MPEG - streams. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_1`` - - MPEG-1/2 Layer I encoding - * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_2`` - - MPEG-1/2 Layer II encoding - * - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_3`` - - MPEG-1/2 Layer III encoding - * - ``V4L2_MPEG_AUDIO_ENCODING_AAC`` - - MPEG-2/4 AAC (Advanced Audio Coding) - * - ``V4L2_MPEG_AUDIO_ENCODING_AC3`` - - AC-3 aka ATSC A/52 encoding - - - -.. _v4l2-mpeg-audio-l1-bitrate: - -``V4L2_CID_MPEG_AUDIO_L1_BITRATE`` - (enum) - -enum v4l2_mpeg_audio_l1_bitrate - - MPEG-1/2 Layer I bitrate. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_32K`` - - 32 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_64K`` - - 64 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_96K`` - - 96 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_128K`` - - 128 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_160K`` - - 160 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_192K`` - - 192 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_224K`` - - 224 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_256K`` - - 256 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_288K`` - - 288 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_320K`` - - 320 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_352K`` - - 352 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_384K`` - - 384 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_416K`` - - 416 kbit/s - * - ``V4L2_MPEG_AUDIO_L1_BITRATE_448K`` - - 448 kbit/s - - - -.. _v4l2-mpeg-audio-l2-bitrate: - -``V4L2_CID_MPEG_AUDIO_L2_BITRATE`` - (enum) - -enum v4l2_mpeg_audio_l2_bitrate - - MPEG-1/2 Layer II bitrate. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_32K`` - - 32 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_48K`` - - 48 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_56K`` - - 56 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_64K`` - - 64 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_80K`` - - 80 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_96K`` - - 96 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_112K`` - - 112 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_128K`` - - 128 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_160K`` - - 160 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_192K`` - - 192 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_224K`` - - 224 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_256K`` - - 256 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_320K`` - - 320 kbit/s - * - ``V4L2_MPEG_AUDIO_L2_BITRATE_384K`` - - 384 kbit/s - - - -.. _v4l2-mpeg-audio-l3-bitrate: - -``V4L2_CID_MPEG_AUDIO_L3_BITRATE`` - (enum) - -enum v4l2_mpeg_audio_l3_bitrate - - MPEG-1/2 Layer III bitrate. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_32K`` - - 32 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_40K`` - - 40 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_48K`` - - 48 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_56K`` - - 56 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_64K`` - - 64 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_80K`` - - 80 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_96K`` - - 96 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_112K`` - - 112 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_128K`` - - 128 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_160K`` - - 160 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_192K`` - - 192 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_224K`` - - 224 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_256K`` - - 256 kbit/s - * - ``V4L2_MPEG_AUDIO_L3_BITRATE_320K`` - - 320 kbit/s - - - -``V4L2_CID_MPEG_AUDIO_AAC_BITRATE (integer)`` - AAC bitrate in bits per second. - -.. _v4l2-mpeg-audio-ac3-bitrate: - -``V4L2_CID_MPEG_AUDIO_AC3_BITRATE`` - (enum) - -enum v4l2_mpeg_audio_ac3_bitrate - - AC-3 bitrate. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_32K`` - - 32 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_40K`` - - 40 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_48K`` - - 48 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_56K`` - - 56 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_64K`` - - 64 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_80K`` - - 80 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_96K`` - - 96 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_112K`` - - 112 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_128K`` - - 128 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_160K`` - - 160 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_192K`` - - 192 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_224K`` - - 224 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_256K`` - - 256 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_320K`` - - 320 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_384K`` - - 384 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_448K`` - - 448 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_512K`` - - 512 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_576K`` - - 576 kbit/s - * - ``V4L2_MPEG_AUDIO_AC3_BITRATE_640K`` - - 640 kbit/s - - - -.. _v4l2-mpeg-audio-mode: - -``V4L2_CID_MPEG_AUDIO_MODE`` - (enum) - -enum v4l2_mpeg_audio_mode - - MPEG Audio mode. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_MODE_STEREO`` - - Stereo - * - ``V4L2_MPEG_AUDIO_MODE_JOINT_STEREO`` - - Joint Stereo - * - ``V4L2_MPEG_AUDIO_MODE_DUAL`` - - Bilingual - * - ``V4L2_MPEG_AUDIO_MODE_MONO`` - - Mono - - - -.. _v4l2-mpeg-audio-mode-extension: - -``V4L2_CID_MPEG_AUDIO_MODE_EXTENSION`` - (enum) - -enum v4l2_mpeg_audio_mode_extension - - Joint Stereo audio mode extension. In Layer I and II they indicate - which subbands are in intensity stereo. All other subbands are coded - in stereo. Layer III is not (yet) supported. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4`` - - Subbands 4-31 in intensity stereo - * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8`` - - Subbands 8-31 in intensity stereo - * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12`` - - Subbands 12-31 in intensity stereo - * - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16`` - - Subbands 16-31 in intensity stereo - - - -.. _v4l2-mpeg-audio-emphasis: - -``V4L2_CID_MPEG_AUDIO_EMPHASIS`` - (enum) - -enum v4l2_mpeg_audio_emphasis - - Audio Emphasis. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_EMPHASIS_NONE`` - - None - * - ``V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS`` - - 50/15 microsecond emphasis - * - ``V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17`` - - CCITT J.17 - - - -.. _v4l2-mpeg-audio-crc: - -``V4L2_CID_MPEG_AUDIO_CRC`` - (enum) - -enum v4l2_mpeg_audio_crc - - CRC method. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_CRC_NONE`` - - None - * - ``V4L2_MPEG_AUDIO_CRC_CRC16`` - - 16 bit parity check - - - -``V4L2_CID_MPEG_AUDIO_MUTE (boolean)`` - Mutes the audio when capturing. This is not done by muting audio - hardware, which can still produce a slight hiss, but in the encoder - itself, guaranteeing a fixed and reproducible audio bitstream. 0 = - unmuted, 1 = muted. - -.. _v4l2-mpeg-audio-dec-playback: - -``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` - (enum) - -enum v4l2_mpeg_audio_dec_playback - - Determines how monolingual audio should be played back. Possible - values are: - - - -.. tabularcolumns:: |p{9.8cm}|p{7.7cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO`` - - Automatically determines the best playback mode. - * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO`` - - Stereo playback. - * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT`` - - Left channel playback. - * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT`` - - Right channel playback. - * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO`` - - Mono playback. - * - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO`` - - Stereo playback with swapped left and right channels. - - - -.. _v4l2-mpeg-audio-dec-multilingual-playback: - -``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` - (enum) - -enum v4l2_mpeg_audio_dec_playback - - Determines how multilingual audio should be played back. - -.. _v4l2-mpeg-video-encoding: - -``V4L2_CID_MPEG_VIDEO_ENCODING`` - (enum) - -enum v4l2_mpeg_video_encoding - - MPEG Video encoding method. This control is specific to multiplexed - MPEG streams. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_1`` - - MPEG-1 Video encoding - * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_2`` - - MPEG-2 Video encoding - * - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC`` - - MPEG-4 AVC (H.264) Video encoding - - - -.. _v4l2-mpeg-video-aspect: - -``V4L2_CID_MPEG_VIDEO_ASPECT`` - (enum) - -enum v4l2_mpeg_video_aspect - - Video aspect. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_ASPECT_1x1`` - * - ``V4L2_MPEG_VIDEO_ASPECT_4x3`` - * - ``V4L2_MPEG_VIDEO_ASPECT_16x9`` - * - ``V4L2_MPEG_VIDEO_ASPECT_221x100`` - - - -``V4L2_CID_MPEG_VIDEO_B_FRAMES (integer)`` - Number of B-Frames (default 2) - -``V4L2_CID_MPEG_VIDEO_GOP_SIZE (integer)`` - GOP size (default 12) - -``V4L2_CID_MPEG_VIDEO_GOP_CLOSURE (boolean)`` - GOP closure (default 1) - -``V4L2_CID_MPEG_VIDEO_PULLDOWN (boolean)`` - Enable 3:2 pulldown (default 0) - -.. _v4l2-mpeg-video-bitrate-mode: - -``V4L2_CID_MPEG_VIDEO_BITRATE_MODE`` - (enum) - -enum v4l2_mpeg_video_bitrate_mode - - Video bitrate mode. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_VBR`` - - Variable bitrate - * - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CBR`` - - Constant bitrate - - - -``V4L2_CID_MPEG_VIDEO_BITRATE (integer)`` - Video bitrate in bits per second. - -``V4L2_CID_MPEG_VIDEO_BITRATE_PEAK (integer)`` - Peak video bitrate in bits per second. Must be larger or equal to - the average video bitrate. It is ignored if the video bitrate mode - is set to constant bitrate. - -``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)`` - For every captured frame, skip this many subsequent frames (default - 0). - -``V4L2_CID_MPEG_VIDEO_MUTE (boolean)`` - "Mutes" the video to a fixed color when capturing. This is useful - for testing, to produce a fixed video bitstream. 0 = unmuted, 1 = - muted. - -``V4L2_CID_MPEG_VIDEO_MUTE_YUV (integer)`` - Sets the "mute" color of the video. The supplied 32-bit integer is - interpreted as follows (bit 0 = least significant bit): - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - Bit 0:7 - - V chrominance information - * - Bit 8:15 - - U chrominance information - * - Bit 16:23 - - Y luminance information - * - Bit 24:31 - - Must be zero. - - - -.. _v4l2-mpeg-video-dec-pts: - -``V4L2_CID_MPEG_VIDEO_DEC_PTS (integer64)`` - This read-only control returns the 33-bit video Presentation Time - Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of the - currently displayed frame. This is the same PTS as is used in - :ref:`VIDIOC_DECODER_CMD`. - -.. _v4l2-mpeg-video-dec-frame: - -``V4L2_CID_MPEG_VIDEO_DEC_FRAME (integer64)`` - This read-only control returns the frame counter of the frame that - is currently displayed (decoded). This value is reset to 0 whenever - the decoder is started. - -``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)`` - If enabled the decoder expects to receive a single slice per buffer, - otherwise the decoder expects a single frame in per buffer. - Applicable to the decoder, all codecs. - -``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)`` - Enable writing sample aspect ratio in the Video Usability - Information. Applicable to the H264 encoder. - -.. _v4l2-mpeg-video-h264-vui-sar-idc: - -``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC`` - (enum) - -enum v4l2_mpeg_video_h264_vui_sar_idc - - VUI sample aspect ratio indicator for H.264 encoding. The value is - defined in the table E-1 in the standard. Applicable to the H264 - encoder. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED`` - - Unspecified - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1`` - - 1x1 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11`` - - 12x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11`` - - 10x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11`` - - 16x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33`` - - 40x33 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11`` - - 24x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11`` - - 20x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11`` - - 32x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33`` - - 80x33 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11`` - - 18x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11`` - - 15x11 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33`` - - 64x33 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99`` - - 160x99 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3`` - - 4x3 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2`` - - 3x2 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1`` - - 2x1 - * - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED`` - - Extended SAR - - - -``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH (integer)`` - Extended sample aspect ratio width for H.264 VUI encoding. - Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT (integer)`` - Extended sample aspect ratio height for H.264 VUI encoding. - Applicable to the H264 encoder. - -.. _v4l2-mpeg-video-h264-level: - -``V4L2_CID_MPEG_VIDEO_H264_LEVEL`` - (enum) - -enum v4l2_mpeg_video_h264_level - - The level information for the H264 video elementary stream. - Applicable to the H264 encoder. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_0`` - - Level 1.0 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1B`` - - Level 1B - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_1`` - - Level 1.1 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_2`` - - Level 1.2 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_3`` - - Level 1.3 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_0`` - - Level 2.0 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_1`` - - Level 2.1 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_2`` - - Level 2.2 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_0`` - - Level 3.0 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_1`` - - Level 3.1 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_2`` - - Level 3.2 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_0`` - - Level 4.0 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_1`` - - Level 4.1 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_2`` - - Level 4.2 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_0`` - - Level 5.0 - * - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_1`` - - Level 5.1 - - - -.. _v4l2-mpeg-video-mpeg2-level: - -``V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL`` - (enum) - -enum v4l2_mpeg_video_mpeg2_level - - The level information for the MPEG2 elementary stream. Applicable to - MPEG2 codecs. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW`` - - Low Level (LL) - * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN`` - - Main Level (ML) - * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440`` - - High-1440 Level (H-14) - * - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH`` - - High Level (HL) - - - -.. _v4l2-mpeg-video-mpeg4-level: - -``V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL`` - (enum) - -enum v4l2_mpeg_video_mpeg4_level - - The level information for the MPEG4 elementary stream. Applicable to - the MPEG4 encoder. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0`` - - Level 0 - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B`` - - Level 0b - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_1`` - - Level 1 - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_2`` - - Level 2 - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3`` - - Level 3 - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B`` - - Level 3b - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_4`` - - Level 4 - * - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_5`` - - Level 5 - - - -.. _v4l2-mpeg-video-h264-profile: - -``V4L2_CID_MPEG_VIDEO_H264_PROFILE`` - (enum) - -enum v4l2_mpeg_video_h264_profile - - The profile information for H264. Applicable to the H264 encoder. - Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE`` - - Baseline profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE`` - - Constrained Baseline profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MAIN`` - - Main profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED`` - - Extended profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH`` - - High profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10`` - - High 10 profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422`` - - High 422 profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE`` - - High 444 Predictive profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA`` - - High 10 Intra profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA`` - - High 422 Intra profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA`` - - High 444 Intra profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA`` - - CAVLC 444 Intra profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE`` - - Scalable Baseline profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH`` - - Scalable High profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA`` - - Scalable High Intra profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH`` - - Stereo High profile - * - ``V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH`` - - Multiview High profile - - - -.. _v4l2-mpeg-video-mpeg2-profile: - -``V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE`` - (enum) - -enum v4l2_mpeg_video_mpeg2_profile - - The profile information for MPEG2. Applicable to MPEG2 codecs. - Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE`` - - Simple profile (SP) - * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN`` - - Main profile (MP) - * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE`` - - SNR Scalable profile (SNR) - * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE`` - - Spatially Scalable profile (Spt) - * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH`` - - High profile (HP) - * - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW`` - - Multi-view profile (MVP) - - - -.. _v4l2-mpeg-video-mpeg4-profile: - -``V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE`` - (enum) - -enum v4l2_mpeg_video_mpeg4_profile - - The profile information for MPEG4. Applicable to the MPEG4 encoder. - Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE`` - - Simple profile - * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE`` - - Advanced Simple profile - * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE`` - - Core profile - * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE`` - - Simple Scalable profile - * - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY`` - - - - - -``V4L2_CID_MPEG_VIDEO_MAX_REF_PIC (integer)`` - The maximum number of reference pictures used for encoding. - Applicable to the encoder. - -.. _v4l2-mpeg-video-multi-slice-mode: - -``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` - (enum) - -enum v4l2_mpeg_video_multi_slice_mode - - Determines how the encoder should handle division of frame into - slices. Applicable to the encoder. Possible values are: - - - -.. tabularcolumns:: |p{9.6cm}|p{7.9cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE`` - - Single slice per frame. - * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB`` - - Multiple slices with set maximum number of macroblocks per slice. - * - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES`` - - Multiple slice with set maximum size in bytes per slice. - - - -``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB (integer)`` - The maximum number of macroblocks in a slice. Used when - ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``. Applicable to the - encoder. - -``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES (integer)`` - The maximum size of a slice in bytes. Used when - ``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``. Applicable to the - encoder. - -.. _v4l2-mpeg-video-h264-loop-filter-mode: - -``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE`` - (enum) - -enum v4l2_mpeg_video_h264_loop_filter_mode - - Loop filter mode for H264 encoder. Possible values are: - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{13.6cm}|p{3.9cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED`` - - Loop filter is enabled. - * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED`` - - Loop filter is disabled. - * - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY`` - - Loop filter is disabled at the slice boundary. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA (integer)`` - Loop filter alpha coefficient, defined in the H264 standard. - This value corresponds to the slice_alpha_c0_offset_div2 slice header - field, and should be in the range of -6 to +6, inclusive. The actual alpha - offset FilterOffsetA is twice this value. - Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA (integer)`` - Loop filter beta coefficient, defined in the H264 standard. - This corresponds to the slice_beta_offset_div2 slice header field, and - should be in the range of -6 to +6, inclusive. The actual beta offset - FilterOffsetB is twice this value. - Applicable to the H264 encoder. - -.. _v4l2-mpeg-video-h264-entropy-mode: - -``V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE`` - (enum) - -enum v4l2_mpeg_video_h264_entropy_mode - - Entropy coding mode for H264 - CABAC/CAVALC. Applicable to the H264 - encoder. Possible values are: - - -.. tabularcolumns:: |p{9.0cm}|p{8.5cm}| - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC`` - - Use CAVLC entropy coding. - * - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC`` - - Use CABAC entropy coding. - - - -``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)`` - Enable 8X8 transform for H264. Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (boolean)`` - Enable constrained intra prediction for H264. Applicable to the H264 - encoder. - -``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)`` - Specify the offset that should be added to the luma quantization - parameter to determine the chroma quantization parameter. Applicable - to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)`` - Cyclic intra macroblock refresh. This is the number of continuous - macroblocks refreshed every frame. Each frame a successive set of - macroblocks is refreshed until the cycle completes and starts from - the top of the frame. Applicable to H264, H263 and MPEG4 encoder. - -``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)`` - Frame level rate control enable. If this control is disabled then - the quantization parameter for each frame type is constant and set - with appropriate controls (e.g. - ``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is - enabled then quantization parameter is adjusted to meet the chosen - bitrate. Minimum and maximum value for the quantization parameter - can be set with appropriate controls (e.g. - ``V4L2_CID_MPEG_VIDEO_H263_MIN_QP``). Applicable to encoders. - -``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE (boolean)`` - Macroblock level rate control enable. Applicable to the MPEG4 and - H264 encoders. - -``V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (boolean)`` - Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4 - encoder. - -``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP (integer)`` - Quantization parameter for an I frame for H263. Valid range: from 1 - to 31. - -``V4L2_CID_MPEG_VIDEO_H263_MIN_QP (integer)`` - Minimum quantization parameter for H263. Valid range: from 1 to 31. - -``V4L2_CID_MPEG_VIDEO_H263_MAX_QP (integer)`` - Maximum quantization parameter for H263. Valid range: from 1 to 31. - -``V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (integer)`` - Quantization parameter for an P frame for H263. Valid range: from 1 - to 31. - -``V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP (integer)`` - Quantization parameter for an B frame for H263. Valid range: from 1 - to 31. - -``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP (integer)`` - Quantization parameter for an I frame for H264. Valid range: from 0 - to 51. - -``V4L2_CID_MPEG_VIDEO_H264_MIN_QP (integer)`` - Minimum quantization parameter for H264. Valid range: from 0 to 51. - -``V4L2_CID_MPEG_VIDEO_H264_MAX_QP (integer)`` - Maximum quantization parameter for H264. Valid range: from 0 to 51. - -``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP (integer)`` - Quantization parameter for an P frame for H264. Valid range: from 0 - to 51. - -``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP (integer)`` - Quantization parameter for an B frame for H264. Valid range: from 0 - to 51. - -``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)`` - Minimum quantization parameter for the H264 I frame to limit I frame - quality to a range. Valid range: from 0 to 51. If - V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter - should be chosen to meet both requirements. - -``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)`` - Maximum quantization parameter for the H264 I frame to limit I frame - quality to a range. Valid range: from 0 to 51. If - V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter - should be chosen to meet both requirements. - -``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)`` - Minimum quantization parameter for the H264 P frame to limit P frame - quality to a range. Valid range: from 0 to 51. If - V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter - should be chosen to meet both requirements. - -``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)`` - Maximum quantization parameter for the H264 P frame to limit P frame - quality to a range. Valid range: from 0 to 51. If - V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter - should be chosen to meet both requirements. - -``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)`` - Quantization parameter for an I frame for MPEG4. Valid range: from 1 - to 31. - -``V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP (integer)`` - Minimum quantization parameter for MPEG4. Valid range: from 1 to 31. - -``V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP (integer)`` - Maximum quantization parameter for MPEG4. Valid range: from 1 to 31. - -``V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (integer)`` - Quantization parameter for an P frame for MPEG4. Valid range: from 1 - to 31. - -``V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (integer)`` - Quantization parameter for an B frame for MPEG4. Valid range: from 1 - to 31. - -``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)`` - The Video Buffer Verifier size in kilobytes, it is used as a - limitation of frame skip. The VBV is defined in the standard as a - mean to verify that the produced stream will be successfully - decoded. The standard describes it as "Part of a hypothetical - decoder that is conceptually connected to the output of the encoder. - Its purpose is to provide a constraint on the variability of the - data rate that an encoder or editing process may produce.". - Applicable to the MPEG1, MPEG2, MPEG4 encoders. - -.. _v4l2-mpeg-video-vbv-delay: - -``V4L2_CID_MPEG_VIDEO_VBV_DELAY (integer)`` - Sets the initial delay in milliseconds for VBV buffer control. - -.. _v4l2-mpeg-video-hor-search-range: - -``V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (integer)`` - Horizontal search range defines maximum horizontal search area in - pixels to search and match for the present Macroblock (MB) in the - reference picture. This V4L2 control macro is used to set horizontal - search range for motion estimation module in video encoder. - -.. _v4l2-mpeg-video-vert-search-range: - -``V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (integer)`` - Vertical search range defines maximum vertical search area in pixels - to search and match for the present Macroblock (MB) in the reference - picture. This V4L2 control macro is used to set vertical search - range for motion estimation module in video encoder. - -.. _v4l2-mpeg-video-force-key-frame: - -``V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (button)`` - Force a key frame for the next queued buffer. Applicable to - encoders. This is a general, codec-agnostic keyframe control. - -``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)`` - The Coded Picture Buffer size in kilobytes, it is used as a - limitation of frame skip. The CPB is defined in the H264 standard as - a mean to verify that the produced stream will be successfully - decoded. Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_I_PERIOD (integer)`` - Period between I-frames in the open GOP for H264. In case of an open - GOP this is the period between two I-frames. The period between IDR - (Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE - control. An IDR frame, which stands for Instantaneous Decoding - Refresh is an I-frame after which no prior frames are referenced. - This means that a stream can be restarted from an IDR frame without - the need to store or decode any previous frames. Applicable to the - H264 encoder. - -.. _v4l2-mpeg-video-header-mode: - -``V4L2_CID_MPEG_VIDEO_HEADER_MODE`` - (enum) - -enum v4l2_mpeg_video_header_mode - - Determines whether the header is returned as the first buffer or is - it returned together with the first frame. Applicable to encoders. - Possible values are: - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{10.3cm}|p{7.2cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE`` - - The stream header is returned separately in the first buffer. - * - ``V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME`` - - The stream header is returned together with the first encoded - frame. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (boolean)`` - Repeat the video sequence headers. Repeating these headers makes - random access to the video stream easier. Applicable to the MPEG1, 2 - and 4 encoder. - -``V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER (boolean)`` - Enabled the deblocking post processing filter for MPEG4 decoder. - Applicable to the MPEG4 decoder. - -``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES (integer)`` - vop_time_increment_resolution value for MPEG4. Applicable to the - MPEG4 encoder. - -``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC (integer)`` - vop_time_increment value for MPEG4. Applicable to the MPEG4 - encoder. - -``V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING (boolean)`` - Enable generation of frame packing supplemental enhancement - information in the encoded bitstream. The frame packing SEI message - contains the arrangement of L and R planes for 3D viewing. - Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0 (boolean)`` - Sets current frame as frame0 in frame packing SEI. Applicable to the - H264 encoder. - -.. _v4l2-mpeg-video-h264-sei-fp-arrangement-type: - -``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE`` - (enum) - -enum v4l2_mpeg_video_h264_sei_fp_arrangement_type - - Frame packing arrangement type for H264 SEI. Applicable to the H264 - encoder. Possible values are: - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{12cm}|p{5.5cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD`` - - Pixels are alternatively from L and R. - * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN`` - - L and R are interlaced by column. - * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW`` - - L and R are interlaced by row. - * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE`` - - L is on the left, R on the right. - * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM`` - - L is on top, R on bottom. - * - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL`` - - One view per frame. - -.. raw:: latex - - \normalsize - - - -``V4L2_CID_MPEG_VIDEO_H264_FMO (boolean)`` - Enables flexible macroblock ordering in the encoded bitstream. It is - a technique used for restructuring the ordering of macroblocks in - pictures. Applicable to the H264 encoder. - -.. _v4l2-mpeg-video-h264-fmo-map-type: - -``V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE`` - (enum) - -enum v4l2_mpeg_video_h264_fmo_map_type - - When using FMO, the map type divides the image in different scan - patterns of macroblocks. Applicable to the H264 encoder. Possible - values are: - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{12.5cm}|p{5.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES`` - - Slices are interleaved one after other with macroblocks in run - length order. - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES`` - - Scatters the macroblocks based on a mathematical function known to - both encoder and decoder. - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER`` - - Macroblocks arranged in rectangular areas or regions of interest. - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT`` - - Slice groups grow in a cyclic way from centre to outwards. - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN`` - - Slice groups grow in raster scan pattern from left to right. - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN`` - - Slice groups grow in wipe scan pattern from top to bottom. - * - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT`` - - User defined map type. - -.. raw:: latex - - \normalsize - - - -``V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP (integer)`` - Number of slice groups in FMO. Applicable to the H264 encoder. - -.. _v4l2-mpeg-video-h264-fmo-change-direction: - -``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION`` - (enum) - -enum v4l2_mpeg_video_h264_fmo_change_dir - - Specifies a direction of the slice group change for raster and wipe - maps. Applicable to the H264 encoder. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT`` - - Raster scan or wipe right. - * - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT`` - - Reverse raster scan or wipe left. - - - -``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE (integer)`` - Specifies the size of the first slice group for raster and wipe map. - Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH (integer)`` - Specifies the number of consecutive macroblocks for the interleaved - map. Applicable to the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_ASO (boolean)`` - Enables arbitrary slice ordering in encoded bitstream. Applicable to - the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER (integer)`` - Specifies the slice order in ASO. Applicable to the H264 encoder. - The supplied 32-bit integer is interpreted as follows (bit 0 = least - significant bit): - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - Bit 0:15 - - Slice ID - * - Bit 16:32 - - Slice position or order - - - -``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING (boolean)`` - Enables H264 hierarchical coding. Applicable to the H264 encoder. - -.. _v4l2-mpeg-video-h264-hierarchical-coding-type: - -``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE`` - (enum) - -enum v4l2_mpeg_video_h264_hierarchical_coding_type - - Specifies the hierarchical coding type. Applicable to the H264 - encoder. Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B`` - - Hierarchical B coding. - * - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P`` - - Hierarchical P coding. - - - -``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (integer)`` - Specifies the number of hierarchical coding layers. Applicable to - the H264 encoder. - -``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (integer)`` - Specifies a user defined QP for each layer. Applicable to the H264 - encoder. The supplied 32-bit integer is interpreted as follows (bit - 0 = least significant bit): - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - Bit 0:15 - - QP value - * - Bit 16:32 - - Layer number - - -.. _v4l2-mpeg-h264: - -``V4L2_CID_MPEG_VIDEO_H264_SPS (struct)`` - Specifies the sequence parameter set (as extracted from the - bitstream) for the associated H264 slice data. This includes the - necessary parameters for configuring a stateless hardware decoding - pipeline for H264. The bitstream parameters are defined according - to :ref:`h264`, section 7.4.2.1.1 "Sequence Parameter Set Data - Semantics". For further documentation, refer to the above - specification, unless there is an explicit comment stating - otherwise. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_h264_sps - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_h264_sps - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``profile_idc`` - - - * - __u8 - - ``constraint_set_flags`` - - See :ref:`Sequence Parameter Set Constraints Set Flags <h264_sps_constraints_set_flags>` - * - __u8 - - ``level_idc`` - - - * - __u8 - - ``seq_parameter_set_id`` - - - * - __u8 - - ``chroma_format_idc`` - - - * - __u8 - - ``bit_depth_luma_minus8`` - - - * - __u8 - - ``bit_depth_chroma_minus8`` - - - * - __u8 - - ``log2_max_frame_num_minus4`` - - - * - __u8 - - ``pic_order_cnt_type`` - - - * - __u8 - - ``log2_max_pic_order_cnt_lsb_minus4`` - - - * - __u8 - - ``max_num_ref_frames`` - - - * - __u8 - - ``num_ref_frames_in_pic_order_cnt_cycle`` - - - * - __s32 - - ``offset_for_ref_frame[255]`` - - - * - __s32 - - ``offset_for_non_ref_pic`` - - - * - __s32 - - ``offset_for_top_to_bottom_field`` - - - * - __u16 - - ``pic_width_in_mbs_minus1`` - - - * - __u16 - - ``pic_height_in_map_units_minus1`` - - - * - __u32 - - ``flags`` - - See :ref:`Sequence Parameter Set Flags <h264_sps_flags>` - -.. _h264_sps_constraints_set_flags: - -``Sequence Parameter Set Constraints Set Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_H264_SPS_CONSTRAINT_SET0_FLAG`` - - 0x00000001 - - - * - ``V4L2_H264_SPS_CONSTRAINT_SET1_FLAG`` - - 0x00000002 - - - * - ``V4L2_H264_SPS_CONSTRAINT_SET2_FLAG`` - - 0x00000004 - - - * - ``V4L2_H264_SPS_CONSTRAINT_SET3_FLAG`` - - 0x00000008 - - - * - ``V4L2_H264_SPS_CONSTRAINT_SET4_FLAG`` - - 0x00000010 - - - * - ``V4L2_H264_SPS_CONSTRAINT_SET5_FLAG`` - - 0x00000020 - - - -.. _h264_sps_flags: - -``Sequence Parameter Set Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE`` - - 0x00000001 - - - * - ``V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS`` - - 0x00000002 - - - * - ``V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO`` - - 0x00000004 - - - * - ``V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED`` - - 0x00000008 - - - * - ``V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY`` - - 0x00000010 - - - * - ``V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD`` - - 0x00000020 - - - * - ``V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE`` - - 0x00000040 - - - -``V4L2_CID_MPEG_VIDEO_H264_PPS (struct)`` - Specifies the picture parameter set (as extracted from the - bitstream) for the associated H264 slice data. This includes the - necessary parameters for configuring a stateless hardware decoding - pipeline for H264. The bitstream parameters are defined according - to :ref:`h264`, section 7.4.2.2 "Picture Parameter Set RBSP - Semantics". For further documentation, refer to the above - specification, unless there is an explicit comment stating - otherwise. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_h264_pps - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_h264_pps - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``pic_parameter_set_id`` - - - * - __u8 - - ``seq_parameter_set_id`` - - - * - __u8 - - ``num_slice_groups_minus1`` - - - * - __u8 - - ``num_ref_idx_l0_default_active_minus1`` - - - * - __u8 - - ``num_ref_idx_l1_default_active_minus1`` - - - * - __u8 - - ``weighted_bipred_idc`` - - - * - __s8 - - ``pic_init_qp_minus26`` - - - * - __s8 - - ``pic_init_qs_minus26`` - - - * - __s8 - - ``chroma_qp_index_offset`` - - - * - __s8 - - ``second_chroma_qp_index_offset`` - - - * - __u16 - - ``flags`` - - See :ref:`Picture Parameter Set Flags <h264_pps_flags>` - -.. _h264_pps_flags: - -``Picture Parameter Set Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE`` - - 0x00000001 - - - * - ``V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT`` - - 0x00000002 - - - * - ``V4L2_H264_PPS_FLAG_WEIGHTED_PRED`` - - 0x00000004 - - - * - ``V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT`` - - 0x00000008 - - - * - ``V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED`` - - 0x00000010 - - - * - ``V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT`` - - 0x00000020 - - - * - ``V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE`` - - 0x00000040 - - - * - ``V4L2_H264_PPS_FLAG_PIC_SCALING_MATRIX_PRESENT`` - - 0x00000080 - - - -``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX (struct)`` - Specifies the scaling matrix (as extracted from the bitstream) for - the associated H264 slice data. The bitstream parameters are - defined according to :ref:`h264`, section 7.4.2.1.1.1 "Scaling - List Semantics". For further documentation, refer to the above - specification, unless there is an explicit comment stating - otherwise. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_h264_scaling_matrix - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_h264_scaling_matrix - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``scaling_list_4x4[6][16]`` - - Scaling matrix after applying the inverse scanning process. - Expected list order is Intra Y, Intra Cb, Intra Cr, Inter Y, - Inter Cb, Inter Cr. - * - __u8 - - ``scaling_list_8x8[6][64]`` - - Scaling matrix after applying the inverse scanning process. - Expected list order is Intra Y, Inter Y, Intra Cb, Inter Cb, - Intra Cr, Inter Cr. - -``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (struct)`` - Specifies the slice parameters (as extracted from the bitstream) - for the associated H264 slice data. This includes the necessary - parameters for configuring a stateless hardware decoding pipeline - for H264. The bitstream parameters are defined according to - :ref:`h264`, section 7.4.3 "Slice Header Semantics". For further - documentation, refer to the above specification, unless there is - an explicit comment stating otherwise. - - .. note:: - - This compound control is not yet part of the public kernel API - and it is expected to change. - - This structure is expected to be passed as an array, with one - entry for each slice included in the bitstream buffer. - -.. c:type:: v4l2_ctrl_h264_slice_params - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_h264_slice_params - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``size`` - - - * - __u32 - - ``start_byte_offset`` - Offset (in bytes) from the beginning of the OUTPUT buffer to the start - of the slice. If the slice starts with a start code, then this is the - offset to such start code. When operating in slice-based decoding mode - (see :c:type:`v4l2_mpeg_video_h264_decode_mode`), this field should - be set to 0. When operating in frame-based decoding mode, this field - should be 0 for the first slice. - * - __u32 - - ``header_bit_size`` - - - * - __u16 - - ``first_mb_in_slice`` - - - * - __u8 - - ``slice_type`` - - - * - __u8 - - ``pic_parameter_set_id`` - - - * - __u8 - - ``colour_plane_id`` - - - * - __u8 - - ``redundant_pic_cnt`` - - - * - __u16 - - ``frame_num`` - - - * - __u16 - - ``idr_pic_id`` - - - * - __u16 - - ``pic_order_cnt_lsb`` - - - * - __s32 - - ``delta_pic_order_cnt_bottom`` - - - * - __s32 - - ``delta_pic_order_cnt0`` - - - * - __s32 - - ``delta_pic_order_cnt1`` - - - * - struct :c:type:`v4l2_h264_pred_weight_table` - - ``pred_weight_table`` - - - * - __u32 - - ``dec_ref_pic_marking_bit_size`` - - Size in bits of the dec_ref_pic_marking() syntax element. - * - __u32 - - ``pic_order_cnt_bit_size`` - - - * - __u8 - - ``cabac_init_idc`` - - - * - __s8 - - ``slice_qp_delta`` - - - * - __s8 - - ``slice_qs_delta`` - - - * - __u8 - - ``disable_deblocking_filter_idc`` - - - * - __s8 - - ``slice_alpha_c0_offset_div2`` - - - * - __s8 - - ``slice_beta_offset_div2`` - - - * - __u8 - - ``num_ref_idx_l0_active_minus1`` - - If num_ref_idx_active_override_flag is not set, this field must be - set to the value of num_ref_idx_l0_default_active_minus1. - * - __u8 - - ``num_ref_idx_l1_active_minus1`` - - If num_ref_idx_active_override_flag is not set, this field must be - set to the value of num_ref_idx_l1_default_active_minus1. - * - __u32 - - ``slice_group_change_cycle`` - - - * - __u8 - - ``ref_pic_list0[32]`` - - Reference picture list after applying the per-slice modifications - * - __u8 - - ``ref_pic_list1[32]`` - - Reference picture list after applying the per-slice modifications - * - __u32 - - ``flags`` - - See :ref:`Slice Parameter Flags <h264_slice_flags>` - -.. _h264_slice_flags: - -``Slice Parameter Set Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_H264_SLICE_FLAG_FIELD_PIC`` - - 0x00000001 - - - * - ``V4L2_H264_SLICE_FLAG_BOTTOM_FIELD`` - - 0x00000002 - - - * - ``V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED`` - - 0x00000004 - - - * - ``V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH`` - - 0x00000008 - - - -``Prediction Weight Table`` - - The bitstream parameters are defined according to :ref:`h264`, - section 7.4.3.2 "Prediction Weight Table Semantics". For further - documentation, refer to the above specification, unless there is - an explicit comment stating otherwise. - -.. c:type:: v4l2_h264_pred_weight_table - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_h264_pred_weight_table - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u16 - - ``luma_log2_weight_denom`` - - - * - __u16 - - ``chroma_log2_weight_denom`` - - - * - struct :c:type:`v4l2_h264_weight_factors` - - ``weight_factors[2]`` - - The weight factors at index 0 are the weight factors for the reference - list 0, the one at index 1 for the reference list 1. - -.. c:type:: v4l2_h264_weight_factors - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_h264_weight_factors - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __s16 - - ``luma_weight[32]`` - - - * - __s16 - - ``luma_offset[32]`` - - - * - __s16 - - ``chroma_weight[32][2]`` - - - * - __s16 - - ``chroma_offset[32][2]`` - - - -``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS (struct)`` - Specifies the decode parameters (as extracted from the bitstream) - for the associated H264 slice data. This includes the necessary - parameters for configuring a stateless hardware decoding pipeline - for H264. The bitstream parameters are defined according to - :ref:`h264`. For further documentation, refer to the above - specification, unless there is an explicit comment stating - otherwise. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_h264_decode_params - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_h264_decode_params - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - struct :c:type:`v4l2_h264_dpb_entry` - - ``dpb[16]`` - - - * - __u16 - - ``num_slices`` - - Number of slices needed to decode the current frame/field. When - operating in slice-based decoding mode (see - :c:type:`v4l2_mpeg_video_h264_decode_mode`), this field - should always be set to one. - * - __u16 - - ``nal_ref_idc`` - - NAL reference ID value coming from the NAL Unit header - * - __s32 - - ``top_field_order_cnt`` - - Picture Order Count for the coded top field - * - __s32 - - ``bottom_field_order_cnt`` - - Picture Order Count for the coded bottom field - * - __u32 - - ``flags`` - - See :ref:`Decode Parameters Flags <h264_decode_params_flags>` - -.. _h264_decode_params_flags: - -``Decode Parameters Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC`` - - 0x00000001 - - That picture is an IDR picture - -.. c:type:: v4l2_h264_dpb_entry - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_h264_dpb_entry - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u64 - - ``reference_ts`` - - Timestamp of the V4L2 capture buffer to use as reference, used - with B-coded and P-coded frames. The timestamp refers to the - ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the - :c:func:`v4l2_timeval_to_ns()` function to convert the struct - :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. - * - __u16 - - ``frame_num`` - - - * - __u16 - - ``pic_num`` - - - * - __s32 - - ``top_field_order_cnt`` - - - * - __s32 - - ``bottom_field_order_cnt`` - - - * - __u32 - - ``flags`` - - See :ref:`DPB Entry Flags <h264_dpb_flags>` - -.. _h264_dpb_flags: - -``DPB Entries Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_H264_DPB_ENTRY_FLAG_VALID`` - - 0x00000001 - - The DPB entry is valid and should be considered - * - ``V4L2_H264_DPB_ENTRY_FLAG_ACTIVE`` - - 0x00000002 - - The DPB entry is currently being used as a reference frame - * - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM`` - - 0x00000004 - - The DPB entry is a long term reference frame - * - ``V4L2_H264_DPB_ENTRY_FLAG_FIELD`` - - 0x00000008 - - The DPB entry is a field reference, which means only one of the field - will be used when decoding the new frame/field. When not set the DPB - entry is a frame reference (both fields will be used). Note that this - flag does not say anything about the number of fields contained in the - reference frame, it just describes the one used to decode the new - field/frame - * - ``V4L2_H264_DPB_ENTRY_FLAG_BOTTOM_FIELD`` - - 0x00000010 - - The DPB entry is a bottom field reference (only the bottom field of the - reference frame is needed to decode the new frame/field). Only valid if - V4L2_H264_DPB_ENTRY_FLAG_FIELD is set. When - V4L2_H264_DPB_ENTRY_FLAG_FIELD is set but - V4L2_H264_DPB_ENTRY_FLAG_BOTTOM_FIELD is not, that means the - DPB entry is a top field reference - -``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE (enum)`` - Specifies the decoding mode to use. Currently exposes slice-based and - frame-based decoding but new modes might be added later on. - This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE - pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE - are required to set this control in order to specify the decoding mode - that is expected for the buffer. - Drivers may expose a single or multiple decoding modes, depending - on what they can support. - - .. note:: - - This menu control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_mpeg_video_h264_decode_mode - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED`` - - 0 - - Decoding is done at the slice granularity. - In this mode, ``num_slices`` field in struct - :c:type:`v4l2_ctrl_h264_decode_params` should be set to 1, - and ``start_byte_offset`` in struct - :c:type:`v4l2_ctrl_h264_slice_params` should be set to 0. - The OUTPUT buffer must contain a single slice. - * - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED`` - - 1 - - Decoding is done at the frame granularity. - In this mode, ``num_slices`` field in struct - :c:type:`v4l2_ctrl_h264_decode_params` should be set to the number - of slices in the frame, and ``start_byte_offset`` in struct - :c:type:`v4l2_ctrl_h264_slice_params` should be set accordingly - for each slice. For the first slice, ``start_byte_offset`` should - be zero. - The OUTPUT buffer must contain all slices needed to decode the - frame. The OUTPUT buffer must also contain both fields. - -``V4L2_CID_MPEG_VIDEO_H264_START_CODE (enum)`` - Specifies the H264 slice start code expected for each slice. - This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE - pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE - are required to set this control in order to specify the start code - that is expected for the buffer. - Drivers may expose a single or multiple start codes, depending - on what they can support. - - .. note:: - - This menu control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_mpeg_video_h264_start_code - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_MPEG_VIDEO_H264_START_CODE_NONE`` - - 0 - - Selecting this value specifies that H264 slices are passed - to the driver without any start code. - * - ``V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B`` - - 1 - - Selecting this value specifies that H264 slices are expected - to be prefixed by Annex B start codes. According to :ref:`h264` - valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001. - -.. _v4l2-mpeg-mpeg2: - -``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)`` - Specifies the slice parameters (as extracted from the bitstream) for the - associated MPEG-2 slice data. This includes the necessary parameters for - configuring a stateless hardware decoding pipeline for MPEG-2. - The bitstream parameters are defined according to :ref:`mpeg2part2`. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_mpeg2_slice_params - -.. cssclass:: longtable - -.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}| - -.. flat-table:: struct v4l2_ctrl_mpeg2_slice_params - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``bit_size`` - - Size (in bits) of the current slice data. - * - __u32 - - ``data_bit_offset`` - - Offset (in bits) to the video data in the current slice data. - * - struct :c:type:`v4l2_mpeg2_sequence` - - ``sequence`` - - Structure with MPEG-2 sequence metadata, merging relevant fields from - the sequence header and sequence extension parts of the bitstream. - * - struct :c:type:`v4l2_mpeg2_picture` - - ``picture`` - - Structure with MPEG-2 picture metadata, merging relevant fields from - the picture header and picture coding extension parts of the bitstream. - * - __u64 - - ``backward_ref_ts`` - - Timestamp of the V4L2 capture buffer to use as backward reference, used - with B-coded and P-coded frames. The timestamp refers to the - ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the - :c:func:`v4l2_timeval_to_ns()` function to convert the struct - :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. - * - __u64 - - ``forward_ref_ts`` - - Timestamp for the V4L2 capture buffer to use as forward reference, used - with B-coded frames. The timestamp refers to the ``timestamp`` field in - struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()` - function to convert the struct :c:type:`timeval` in struct - :c:type:`v4l2_buffer` to a __u64. - * - __u32 - - ``quantiser_scale_code`` - - Code used to determine the quantization scale to use for the IDCT. - -.. c:type:: v4l2_mpeg2_sequence - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_mpeg2_sequence - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u16 - - ``horizontal_size`` - - The width of the displayable part of the frame's luminance component. - * - __u16 - - ``vertical_size`` - - The height of the displayable part of the frame's luminance component. - * - __u32 - - ``vbv_buffer_size`` - - Used to calculate the required size of the video buffering verifier, - defined (in bits) as: 16 * 1024 * vbv_buffer_size. - * - __u16 - - ``profile_and_level_indication`` - - The current profile and level indication as extracted from the - bitstream. - * - __u8 - - ``progressive_sequence`` - - Indication that all the frames for the sequence are progressive instead - of interlaced. - * - __u8 - - ``chroma_format`` - - The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4). - -.. c:type:: v4l2_mpeg2_picture - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_mpeg2_picture - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``picture_coding_type`` - - Picture coding type for the frame covered by the current slice - (V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or - V4L2_MPEG2_PICTURE_CODING_TYPE_B). - * - __u8 - - ``f_code[2][2]`` - - Motion vector codes. - * - __u8 - - ``intra_dc_precision`` - - Precision of Discrete Cosine transform (0: 8 bits precision, - 1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision). - * - __u8 - - ``picture_structure`` - - Picture structure (1: interlaced top field, 2: interlaced bottom field, - 3: progressive frame). - * - __u8 - - ``top_field_first`` - - If set to 1 and interlaced stream, top field is output first. - * - __u8 - - ``frame_pred_frame_dct`` - - If set to 1, only frame-DCT and frame prediction are used. - * - __u8 - - ``concealment_motion_vectors`` - - If set to 1, motion vectors are coded for intra macroblocks. - * - __u8 - - ``q_scale_type`` - - This flag affects the inverse quantization process. - * - __u8 - - ``intra_vlc_format`` - - This flag affects the decoding of transform coefficient data. - * - __u8 - - ``alternate_scan`` - - This flag affects the decoding of transform coefficient data. - * - __u8 - - ``repeat_first_field`` - - This flag affects the decoding process of progressive frames. - * - __u16 - - ``progressive_frame`` - - Indicates whether the current frame is progressive. - -``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION (struct)`` - Specifies quantization matrices (as extracted from the bitstream) for the - associated MPEG-2 slice data. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_mpeg2_quantization - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.2cm}|p{8.0cm}|p{7.4cm}| - -.. raw:: latex - - \small - -.. flat-table:: struct v4l2_ctrl_mpeg2_quantization - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``load_intra_quantiser_matrix`` - - One bit to indicate whether to load the ``intra_quantiser_matrix`` data. - * - __u8 - - ``load_non_intra_quantiser_matrix`` - - One bit to indicate whether to load the ``non_intra_quantiser_matrix`` - data. - * - __u8 - - ``load_chroma_intra_quantiser_matrix`` - - One bit to indicate whether to load the - ``chroma_intra_quantiser_matrix`` data, only relevant for non-4:2:0 YUV - formats. - * - __u8 - - ``load_chroma_non_intra_quantiser_matrix`` - - One bit to indicate whether to load the - ``chroma_non_intra_quantiser_matrix`` data, only relevant for non-4:2:0 - YUV formats. - * - __u8 - - ``intra_quantiser_matrix[64]`` - - The quantization matrix coefficients for intra-coded frames, in zigzag - scanning order. It is relevant for both luma and chroma components, - although it can be superseded by the chroma-specific matrix for - non-4:2:0 YUV formats. - * - __u8 - - ``non_intra_quantiser_matrix[64]`` - - The quantization matrix coefficients for non-intra-coded frames, in - zigzag scanning order. It is relevant for both luma and chroma - components, although it can be superseded by the chroma-specific matrix - for non-4:2:0 YUV formats. - * - __u8 - - ``chroma_intra_quantiser_matrix[64]`` - - The quantization matrix coefficients for the chominance component of - intra-coded frames, in zigzag scanning order. Only relevant for - non-4:2:0 YUV formats. - * - __u8 - - ``chroma_non_intra_quantiser_matrix[64]`` - - The quantization matrix coefficients for the chrominance component of - non-intra-coded frames, in zigzag scanning order. Only relevant for - non-4:2:0 YUV formats. - -``V4L2_CID_FWHT_I_FRAME_QP (integer)`` - Quantization parameter for an I frame for FWHT. Valid range: from 1 - to 31. - -``V4L2_CID_FWHT_P_FRAME_QP (integer)`` - Quantization parameter for a P frame for FWHT. Valid range: from 1 - to 31. - -.. _v4l2-mpeg-vp8: - -``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER (struct)`` - Specifies the frame parameters for the associated VP8 parsed frame data. - This includes the necessary parameters for - configuring a stateless hardware decoding pipeline for VP8. - The bitstream parameters are defined according to :ref:`vp8`. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_vp8_frame_header - -.. cssclass:: longtable - -.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}| - -.. flat-table:: struct v4l2_ctrl_vp8_frame_header - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - struct :c:type:`v4l2_vp8_segment_header` - - ``segment_header`` - - Structure with segment-based adjustments metadata. - * - struct :c:type:`v4l2_vp8_loopfilter_header` - - ``loopfilter_header`` - - Structure with loop filter level adjustments metadata. - * - struct :c:type:`v4l2_vp8_quantization_header` - - ``quant_header`` - - Structure with VP8 dequantization indices metadata. - * - struct :c:type:`v4l2_vp8_entropy_header` - - ``entropy_header`` - - Structure with VP8 entropy coder probabilities metadata. - * - struct :c:type:`v4l2_vp8_entropy_coder_state` - - ``coder_state`` - - Structure with VP8 entropy coder state. - * - __u16 - - ``width`` - - The width of the frame. Must be set for all frames. - * - __u16 - - ``height`` - - The height of the frame. Must be set for all frames. - * - __u8 - - ``horizontal_scale`` - - Horizontal scaling factor. - * - __u8 - - ``vertical_scaling factor`` - - Vertical scale. - * - __u8 - - ``version`` - - Bitstream version. - * - __u8 - - ``prob_skip_false`` - - Indicates the probability that the macroblock is not skipped. - * - __u8 - - ``prob_intra`` - - Indicates the probability that a macroblock is intra-predicted. - * - __u8 - - ``prob_last`` - - Indicates the probability that the last reference frame is used - for inter-prediction - * - __u8 - - ``prob_gf`` - - Indicates the probability that the golden reference frame is used - for inter-prediction - * - __u8 - - ``num_dct_parts`` - - Number of DCT coefficients partitions. Must be one of: 1, 2, 4, or 8. - * - __u32 - - ``first_part_size`` - - Size of the first partition, i.e. the control partition. - * - __u32 - - ``first_part_header_bits`` - - Size in bits of the first partition header portion. - * - __u32 - - ``dct_part_sizes[8]`` - - DCT coefficients sizes. - * - __u64 - - ``last_frame_ts`` - - Timestamp for the V4L2 capture buffer to use as last reference frame, used - with inter-coded frames. The timestamp refers to the ``timestamp`` field in - struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()` - function to convert the struct :c:type:`timeval` in struct - :c:type:`v4l2_buffer` to a __u64. - * - __u64 - - ``golden_frame_ts`` - - Timestamp for the V4L2 capture buffer to use as last reference frame, used - with inter-coded frames. The timestamp refers to the ``timestamp`` field in - struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()` - function to convert the struct :c:type:`timeval` in struct - :c:type:`v4l2_buffer` to a __u64. - * - __u64 - - ``alt_frame_ts`` - - Timestamp for the V4L2 capture buffer to use as alternate reference frame, used - with inter-coded frames. The timestamp refers to the ``timestamp`` field in - struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()` - function to convert the struct :c:type:`timeval` in struct - :c:type:`v4l2_buffer` to a __u64. - * - __u64 - - ``flags`` - - See :ref:`Frame Header Flags <vp8_frame_header_flags>` - -.. _vp8_frame_header_flags: - -``Frame Header Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_VP8_FRAME_HEADER_FLAG_KEY_FRAME`` - - 0x01 - - Indicates if the frame is a key frame. - * - ``V4L2_VP8_FRAME_HEADER_FLAG_EXPERIMENTAL`` - - 0x02 - - Experimental bitstream. - * - ``V4L2_VP8_FRAME_HEADER_FLAG_SHOW_FRAME`` - - 0x04 - - Show frame flag, indicates if the frame is for display. - * - ``V4L2_VP8_FRAME_HEADER_FLAG_MB_NO_SKIP_COEFF`` - - 0x08 - - Enable/disable skipping of macroblocks with no non-zero coefficients. - * - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_GOLDEN`` - - 0x10 - - Sign of motion vectors when the golden frame is referenced. - * - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_ALT`` - - 0x20 - - Sign of motion vectors when the alt frame is referenced. - -.. c:type:: v4l2_vp8_entropy_coder_state - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_vp8_entropy_coder_state - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``range`` - - - * - __u8 - - ``value`` - - - * - __u8 - - ``bit_count`` - - - * - __u8 - - ``padding`` - - Applications and drivers must set this to zero. - -.. c:type:: v4l2_vp8_segment_header - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_vp8_segment_header - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __s8 - - ``quant_update[4]`` - - Signed quantizer value update. - * - __s8 - - ``lf_update[4]`` - - Signed loop filter level value update. - * - __u8 - - ``segment_probs[3]`` - - Segment probabilities. - * - __u8 - - ``padding`` - - Applications and drivers must set this to zero. - * - __u32 - - ``flags`` - - See :ref:`Segment Header Flags <vp8_segment_header_flags>` - -.. _vp8_segment_header_flags: - -``Segment Header Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_ENABLED`` - - 0x01 - - Enable/disable segment-based adjustments. - * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_MAP`` - - 0x02 - - Indicates if the macroblock segmentation map is updated in this frame. - * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_FEATURE_DATA`` - - 0x04 - - Indicates if the segment feature data is updated in this frame. - * - ``V4L2_VP8_SEGMENT_HEADER_FLAG_DELTA_VALUE_MODE`` - - 0x08 - - If is set, the segment feature data mode is delta-value. - If cleared, it's absolute-value. - -.. c:type:: v4l2_vp8_loopfilter_header - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_vp8_loopfilter_header - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __s8 - - ``ref_frm_delta[4]`` - - Reference adjustment (signed) delta value. - * - __s8 - - ``mb_mode_delta[4]`` - - Macroblock prediction mode adjustment (signed) delta value. - * - __u8 - - ``sharpness_level`` - - Sharpness level - * - __u8 - - ``level`` - - Filter level - * - __u16 - - ``padding`` - - Applications and drivers must set this to zero. - * - __u32 - - ``flags`` - - See :ref:`Loopfilter Header Flags <vp8_loopfilter_header_flags>` - -.. _vp8_loopfilter_header_flags: - -``Loopfilter Header Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_VP8_LF_HEADER_ADJ_ENABLE`` - - 0x01 - - Enable/disable macroblock-level loop filter adjustment. - * - ``V4L2_VP8_LF_HEADER_DELTA_UPDATE`` - - 0x02 - - Indicates if the delta values used in an adjustment are updated. - * - ``V4L2_VP8_LF_FILTER_TYPE_SIMPLE`` - - 0x04 - - If set, indicates the filter type is simple. - If cleared, the filter type is normal. - -.. c:type:: v4l2_vp8_quantization_header - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_vp8_quantization_header - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``y_ac_qi`` - - Luma AC coefficient table index. - * - __s8 - - ``y_dc_delta`` - - Luma DC delta vaue. - * - __s8 - - ``y2_dc_delta`` - - Y2 block DC delta value. - * - __s8 - - ``y2_ac_delta`` - - Y2 block AC delta value. - * - __s8 - - ``uv_dc_delta`` - - Chroma DC delta value. - * - __s8 - - ``uv_ac_delta`` - - Chroma AC delta value. - * - __u16 - - ``padding`` - - Applications and drivers must set this to zero. - -.. c:type:: v4l2_vp8_entropy_header - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}| - -.. flat-table:: struct v4l2_vp8_entropy_header - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``coeff_probs[4][8][3][11]`` - - Coefficient update probabilities. - * - __u8 - - ``y_mode_probs[4]`` - - Luma mode update probabilities. - * - __u8 - - ``uv_mode_probs[3]`` - - Chroma mode update probabilities. - * - __u8 - - ``mv_probs[2][19]`` - - MV decoding update probabilities. - * - __u8 - - ``padding[3]`` - - Applications and drivers must set this to zero. - -.. raw:: latex - - \normalsize - - -MFC 5.1 MPEG Controls -===================== - -The following MPEG class controls deal with MPEG decoding and encoding -settings that are specific to the Multi Format Codec 5.1 device present -in the S5P family of SoCs by Samsung. - - -.. _mfc51-control-id: - -MFC 5.1 Control IDs -------------------- - -``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE (boolean)`` - If the display delay is enabled then the decoder is forced to return - a CAPTURE buffer (decoded frame) after processing a certain number - of OUTPUT buffers. The delay can be set through - ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY``. This - feature can be used for example for generating thumbnails of videos. - Applicable to the H264 decoder. - -``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)`` - Display delay value for H264 decoder. The decoder is forced to - return a decoded frame after the set 'display delay' number of - frames. If this number is low it may result in frames returned out - of display order, in addition the hardware may still be using the - returned buffer as a reference picture for subsequent frames. - -``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)`` - The number of reference pictures used for encoding a P picture. - Applicable to the H264 encoder. - -``V4L2_CID_MPEG_MFC51_VIDEO_PADDING (boolean)`` - Padding enable in the encoder - use a color instead of repeating - border pixels. Applicable to encoders. - -``V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (integer)`` - Padding color in the encoder. Applicable to encoders. The supplied - 32-bit integer is interpreted as follows (bit 0 = least significant - bit): - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - Bit 0:7 - - V chrominance information - * - Bit 8:15 - - U chrominance information - * - Bit 16:23 - - Y luminance information - * - Bit 24:31 - - Must be zero. - - - -``V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (integer)`` - Reaction coefficient for MFC rate control. Applicable to encoders. - - .. note:: - - #. Valid only when the frame level RC is enabled. - - #. For tight CBR, this field must be small (ex. 2 ~ 10). For - VBR, this field must be large (ex. 100 ~ 1000). - - #. It is not recommended to use the greater number than - FRAME_RATE * (10^9 / BIT_RATE). - -``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK (boolean)`` - Adaptive rate control for dark region. Valid only when H.264 and - macroblock level RC is enabled - (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 - encoder. - -``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH (boolean)`` - Adaptive rate control for smooth region. Valid only when H.264 and - macroblock level RC is enabled - (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 - encoder. - -``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC (boolean)`` - Adaptive rate control for static region. Valid only when H.264 and - macroblock level RC is enabled - (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 - encoder. - -``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY (boolean)`` - Adaptive rate control for activity region. Valid only when H.264 and - macroblock level RC is enabled - (``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264 - encoder. - -.. _v4l2-mpeg-mfc51-video-frame-skip-mode: - -``V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE`` - (enum) - -enum v4l2_mpeg_mfc51_video_frame_skip_mode - - Indicates in what conditions the encoder should skip frames. If - encoding a frame would cause the encoded stream to be larger then a - chosen data limit then the frame will be skipped. Possible values - are: - - -.. tabularcolumns:: |p{9.2cm}|p{8.3cm}| - -.. raw:: latex - - \small - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_DISABLED`` - - Frame skip mode is disabled. - * - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_LEVEL_LIMIT`` - - Frame skip mode enabled and buffer limit is set by the chosen - level and is defined by the standard. - * - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_BUF_LIMIT`` - - Frame skip mode enabled and buffer limit is set by the VBV - (MPEG1/2/4) or CPB (H264) buffer size control. - -.. raw:: latex - - \normalsize - -``V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (integer)`` - Enable rate-control with fixed target bit. If this setting is - enabled, then the rate control logic of the encoder will calculate - the average bitrate for a GOP and keep it below or equal the set - bitrate target. Otherwise the rate control logic calculates the - overall average bitrate for the stream and keeps it below or equal - to the set bitrate. In the first case the average bitrate for the - whole stream will be smaller then the set bitrate. This is caused - because the average is calculated for smaller number of frames, on - the other hand enabling this setting will ensure that the stream - will meet tight bandwidth constraints. Applicable to encoders. - -.. _v4l2-mpeg-mfc51-video-force-frame-type: - -``V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE`` - (enum) - -enum v4l2_mpeg_mfc51_video_force_frame_type - - Force a frame type for the next queued buffer. Applicable to - encoders. Possible values are: - -.. tabularcolumns:: |p{9.5cm}|p{8.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED`` - - Forcing a specific frame type disabled. - * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME`` - - Force an I-frame. - * - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED`` - - Force a non-coded frame. - - -.. _v4l2-mpeg-fwht: - -``V4L2_CID_MPEG_VIDEO_FWHT_PARAMS (struct)`` - Specifies the fwht parameters (as extracted from the bitstream) for the - associated FWHT data. This includes the necessary parameters for - configuring a stateless hardware decoding pipeline for FWHT. - - .. note:: - - This compound control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_ctrl_fwht_params - -.. cssclass:: longtable - -.. tabularcolumns:: |p{1.4cm}|p{4.3cm}|p{11.8cm}| - -.. flat-table:: struct v4l2_ctrl_fwht_params - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u64 - - ``backward_ref_ts`` - - Timestamp of the V4L2 capture buffer to use as backward reference, used - with P-coded frames. The timestamp refers to the - ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the - :c:func:`v4l2_timeval_to_ns()` function to convert the struct - :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. - * - __u32 - - ``version`` - - The version of the codec - * - __u32 - - ``width`` - - The width of the frame - * - __u32 - - ``height`` - - The height of the frame - * - __u32 - - ``flags`` - - The flags of the frame, see :ref:`fwht-flags`. - * - __u32 - - ``colorspace`` - - The colorspace of the frame, from enum :c:type:`v4l2_colorspace`. - * - __u32 - - ``xfer_func`` - - The transfer function, from enum :c:type:`v4l2_xfer_func`. - * - __u32 - - ``ycbcr_enc`` - - The Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`. - * - __u32 - - ``quantization`` - - The quantization range, from enum :c:type:`v4l2_quantization`. - - - -.. _fwht-flags: - -FWHT Flags -============ - -.. cssclass:: longtable - -.. tabularcolumns:: |p{6.8cm}|p{2.4cm}|p{8.3cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``FWHT_FL_IS_INTERLACED`` - - 0x00000001 - - Set if this is an interlaced format - * - ``FWHT_FL_IS_BOTTOM_FIRST`` - - 0x00000002 - - Set if this is a bottom-first (NTSC) interlaced format - * - ``FWHT_FL_IS_ALTERNATE`` - - 0x00000004 - - Set if each 'frame' contains just one field - * - ``FWHT_FL_IS_BOTTOM_FIELD`` - - 0x00000008 - - If FWHT_FL_IS_ALTERNATE was set, then this is set if this 'frame' is the - bottom field, else it is the top field. - * - ``FWHT_FL_LUMA_IS_UNCOMPRESSED`` - - 0x00000010 - - Set if the luma plane is uncompressed - * - ``FWHT_FL_CB_IS_UNCOMPRESSED`` - - 0x00000020 - - Set if the cb plane is uncompressed - * - ``FWHT_FL_CR_IS_UNCOMPRESSED`` - - 0x00000040 - - Set if the cr plane is uncompressed - * - ``FWHT_FL_CHROMA_FULL_HEIGHT`` - - 0x00000080 - - Set if the chroma plane has the same height as the luma plane, - else the chroma plane is half the height of the luma plane - * - ``FWHT_FL_CHROMA_FULL_WIDTH`` - - 0x00000100 - - Set if the chroma plane has the same width as the luma plane, - else the chroma plane is half the width of the luma plane - * - ``FWHT_FL_ALPHA_IS_UNCOMPRESSED`` - - 0x00000200 - - Set if the alpha plane is uncompressed - * - ``FWHT_FL_I_FRAME`` - - 0x00000400 - - Set if this is an I-frame - * - ``FWHT_FL_COMPONENTS_NUM_MSK`` - - 0x00070000 - - A 4-values flag - the number of components - 1 - * - ``FWHT_FL_PIXENC_YUV`` - - 0x00080000 - - Set if the pixel encoding is YUV - * - ``FWHT_FL_PIXENC_RGB`` - - 0x00100000 - - Set if the pixel encoding is RGB - * - ``FWHT_FL_PIXENC_HSV`` - - 0x00180000 - - Set if the pixel encoding is HSV - - -CX2341x MPEG Controls -===================== - -The following MPEG class controls deal with MPEG encoding settings that -are specific to the Conexant CX23415 and CX23416 MPEG encoding chips. - - -.. _cx2341x-control-id: - -CX2341x Control IDs -------------------- - -.. _v4l2-mpeg-cx2341x-video-spatial-filter-mode: - -``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE`` - (enum) - -enum v4l2_mpeg_cx2341x_video_spatial_filter_mode - - Sets the Spatial Filter mode (default ``MANUAL``). Possible values - are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL`` - - Choose the filter manually - * - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO`` - - Choose the filter automatically - - - -``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER (integer (0-15))`` - The setting for the Spatial Filter. 0 = off, 15 = maximum. (Default - is 0.) - -.. _luma-spatial-filter-type: - -``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE`` - (enum) - -enum v4l2_mpeg_cx2341x_video_luma_spatial_filter_type - - Select the algorithm to use for the Luma Spatial Filter (default - ``1D_HOR``). Possible values: - -.. tabularcolumns:: |p{14.5cm}|p{3.0cm}| - -.. raw:: latex - - \small - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF`` - - No filter - * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR`` - - One-dimensional horizontal - * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT`` - - One-dimensional vertical - * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE`` - - Two-dimensional separable - * - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE`` - - Two-dimensional symmetrical non-separable - -.. raw:: latex - - \normalsize - - - -.. _chroma-spatial-filter-type: - -``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE`` - (enum) - -enum v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type - - Select the algorithm for the Chroma Spatial Filter (default - ``1D_HOR``). Possible values are: - - -.. tabularcolumns:: |p{14.0cm}|p{3.5cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF`` - - No filter - * - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR`` - - One-dimensional horizontal - - - -.. _v4l2-mpeg-cx2341x-video-temporal-filter-mode: - -``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE`` - (enum) - -enum v4l2_mpeg_cx2341x_video_temporal_filter_mode - - Sets the Temporal Filter mode (default ``MANUAL``). Possible values - are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL`` - - Choose the filter manually - * - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO`` - - Choose the filter automatically - - - -``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER (integer (0-31))`` - The setting for the Temporal Filter. 0 = off, 31 = maximum. (Default - is 8 for full-scale capturing and 0 for scaled capturing.) - -.. _v4l2-mpeg-cx2341x-video-median-filter-type: - -``V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE`` - (enum) - -enum v4l2_mpeg_cx2341x_video_median_filter_type - - Median Filter Type (default ``OFF``). Possible values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF`` - - No filter - * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR`` - - Horizontal filter - * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT`` - - Vertical filter - * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT`` - - Horizontal and vertical filter - * - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG`` - - Diagonal filter - - - -``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM (integer (0-255))`` - Threshold above which the luminance median filter is enabled - (default 0) - -``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP (integer (0-255))`` - Threshold below which the luminance median filter is enabled - (default 255) - -``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM (integer (0-255))`` - Threshold above which the chroma median filter is enabled (default - 0) - -``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP (integer (0-255))`` - Threshold below which the chroma median filter is enabled (default - 255) - -``V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS (boolean)`` - The CX2341X MPEG encoder can insert one empty MPEG-2 PES packet into - the stream between every four video frames. The packet size is 2048 - bytes, including the packet_start_code_prefix and stream_id - fields. The stream_id is 0xBF (private stream 2). The payload - consists of 0x00 bytes, to be filled in by the application. 0 = do - not insert, 1 = insert packets. - - -VPX Control Reference -===================== - -The VPX controls include controls for encoding parameters of VPx video -codec. - - -.. _vpx-control-id: - -VPX Control IDs ---------------- - -.. _v4l2-vpx-num-partitions: - -``V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS`` - (enum) - -enum v4l2_vp8_num_partitions - - The number of token partitions to use in VP8 encoder. Possible - values are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION`` - - 1 coefficient partition - * - ``V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS`` - - 2 coefficient partitions - * - ``V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS`` - - 4 coefficient partitions - * - ``V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS`` - - 8 coefficient partitions - - - -``V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4 (boolean)`` - Setting this prevents intra 4x4 mode in the intra mode decision. - -.. _v4l2-vpx-num-ref-frames: - -``V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES`` - (enum) - -enum v4l2_vp8_num_ref_frames - - The number of reference pictures for encoding P frames. Possible - values are: - -.. tabularcolumns:: |p{7.9cm}|p{9.6cm}| - -.. raw:: latex - - \small - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME`` - - Last encoded frame will be searched - * - ``V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME`` - - Two frames will be searched among the last encoded frame, the - golden frame and the alternate reference (altref) frame. The - encoder implementation will decide which two are chosen. - * - ``V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME`` - - The last encoded frame, the golden frame and the altref frame will - be searched. - -.. raw:: latex - - \normalsize - - - -``V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL (integer)`` - Indicates the loop filter level. The adjustment of the loop filter - level is done via a delta value against a baseline loop filter - value. - -``V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS (integer)`` - This parameter affects the loop filter. Anything above zero weakens - the deblocking effect on the loop filter. - -``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD (integer)`` - Sets the refresh period for the golden frame. The period is defined - in number of frames. For a value of 'n', every nth frame starting - from the first key frame will be taken as a golden frame. For eg. - for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden - frame refresh period is set as 4, the frames 0, 4, 8 etc will be - taken as the golden frames as frame 0 is always a key frame. - -.. _v4l2-vpx-golden-frame-sel: - -``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL`` - (enum) - -enum v4l2_vp8_golden_frame_sel - - Selects the golden frame for encoding. Possible values are: - -.. raw:: latex - - \scriptsize - -.. tabularcolumns:: |p{9.0cm}|p{8.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV`` - - Use the (n-2)th frame as a golden frame, current frame index being - 'n'. - * - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD`` - - Use the previous specific frame indicated by - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD`` as a - golden frame. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_VPX_MIN_QP (integer)`` - Minimum quantization parameter for VP8. - -``V4L2_CID_MPEG_VIDEO_VPX_MAX_QP (integer)`` - Maximum quantization parameter for VP8. - -``V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP (integer)`` - Quantization parameter for an I frame for VP8. - -``V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (integer)`` - Quantization parameter for a P frame for VP8. - -.. _v4l2-mpeg-video-vp8-profile: - -``V4L2_CID_MPEG_VIDEO_VP8_PROFILE`` - (enum) - -enum v4l2_mpeg_video_vp8_profile - - This control allows selecting the profile for VP8 encoder. - This is also used to enumerate supported profiles by VP8 encoder or decoder. - Possible values are: - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_0`` - - Profile 0 - * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_1`` - - Profile 1 - * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_2`` - - Profile 2 - * - ``V4L2_MPEG_VIDEO_VP8_PROFILE_3`` - - Profile 3 - -.. _v4l2-mpeg-video-vp9-profile: - -``V4L2_CID_MPEG_VIDEO_VP9_PROFILE`` - (enum) - -enum v4l2_mpeg_video_vp9_profile - - This control allows selecting the profile for VP9 encoder. - This is also used to enumerate supported profiles by VP9 encoder or decoder. - Possible values are: - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_0`` - - Profile 0 - * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_1`` - - Profile 1 - * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_2`` - - Profile 2 - * - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3`` - - Profile 3 - - -High Efficiency Video Coding (HEVC/H.265) Control Reference -=========================================================== - -The HEVC/H.265 controls include controls for encoding parameters of HEVC/H.265 -video codec. - - -.. _hevc-control-id: - -HEVC/H.265 Control IDs ----------------------- - -``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)`` - Minimum quantization parameter for HEVC. - Valid range: from 0 to 51. - -``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)`` - Maximum quantization parameter for HEVC. - Valid range: from 0 to 51. - -``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)`` - Quantization parameter for an I frame for HEVC. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)`` - Quantization parameter for a P frame for HEVC. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)`` - Quantization parameter for a B frame for HEVC. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)`` - HIERARCHICAL_QP allows the host to specify the quantization parameter - values for each temporal layer through HIERARCHICAL_QP_LAYER. This is - valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the - control value to 1 enables setting of the QP values for the layers. - -.. _v4l2-hevc-hier-coding-type: - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE`` - (enum) - -enum v4l2_mpeg_video_hevc_hier_coding_type - - Selects the hierarchical coding type for encoding. Possible values are: - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{9.0cm}|p{8.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B`` - - Use the B frame for hierarchical coding. - * - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P`` - - Use the P frame for hierarchical coding. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)`` - Selects the hierarchical coding layer. In normal encoding - (non-hierarchial coding), it should be zero. Possible values are [0, 6]. - 0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates HIERARCHICAL CODING - LAYER 1 and so on. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 0. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 1. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 2. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 3. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 4. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 5. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)`` - Indicates quantization parameter for hierarchical coding layer 6. - Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP, - V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP]. - -.. _v4l2-hevc-profile: - -``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE`` - (enum) - -enum v4l2_mpeg_video_hevc_profile - - Select the desired profile for HEVC encoder. - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{9.0cm}|p{8.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN`` - - Main profile. - * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE`` - - Main still picture profile. - * - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10`` - - Main 10 profile. - -.. raw:: latex - - \normalsize - - -.. _v4l2-hevc-level: - -``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL`` - (enum) - -enum v4l2_mpeg_video_hevc_level - - Selects the desired level for HEVC encoder. - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{9.0cm}|p{8.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_1`` - - Level 1.0 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2`` - - Level 2.0 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1`` - - Level 2.1 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3`` - - Level 3.0 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1`` - - Level 3.1 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4`` - - Level 4.0 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1`` - - Level 4.1 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5`` - - Level 5.0 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1`` - - Level 5.1 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2`` - - Level 5.2 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6`` - - Level 6.0 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1`` - - Level 6.1 - * - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2`` - - Level 6.2 - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)`` - Indicates the number of evenly spaced subintervals, called ticks, within - one second. This is a 16 bit unsigned integer and has a maximum value up to - 0xffff and a minimum value of 1. - -.. _v4l2-hevc-tier: - -``V4L2_CID_MPEG_VIDEO_HEVC_TIER`` - (enum) - -enum v4l2_mpeg_video_hevc_tier - - TIER_FLAG specifies tiers information of the HEVC encoded picture. Tier - were made to deal with applications that differ in terms of maximum bit - rate. Setting the flag to 0 selects HEVC tier as Main tier and setting - this flag to 1 indicates High tier. High tier is for applications requiring - high bit rates. - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{9.0cm}|p{8.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN`` - - Main tier. - * - ``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH`` - - High tier. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)`` - Selects HEVC maximum coding unit depth. - -.. _v4l2-hevc-loop-filter-mode: - -``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE`` - (enum) - -enum v4l2_mpeg_video_hevc_loop_filter_mode - - Loop filter mode for HEVC encoder. Possible values are: - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{12.1cm}|p{5.4cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED`` - - Loop filter is disabled. - * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED`` - - Loop filter is enabled. - * - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY`` - - Loop filter is disabled at the slice boundary. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)`` - Selects HEVC loop filter beta offset. The valid range is [-6, +6]. - -``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)`` - Selects HEVC loop filter tc offset. The valid range is [-6, +6]. - -.. _v4l2-hevc-refresh-type: - -``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE`` - (enum) - -enum v4l2_mpeg_video_hevc_hier_refresh_type - - Selects refresh type for HEVC encoder. - Host has to specify the period into - V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD. - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{8.0cm}|p{9.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE`` - - Use the B frame for hierarchical coding. - * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA`` - - Use CRA (Clean Random Access Unit) picture encoding. - * - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR`` - - Use IDR (Instantaneous Decoding Refresh) picture encoding. - -.. raw:: latex - - \normalsize - - -``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)`` - Selects the refresh period for HEVC encoder. - This specifies the number of I pictures between two CRA/IDR pictures. - This is valid only if REFRESH_TYPE is not 0. - -``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)`` - Indicates HEVC lossless encoding. Setting it to 0 disables lossless - encoding. Setting it to 1 enables lossless encoding. - -``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)`` - Indicates constant intra prediction for HEVC encoder. Specifies the - constrained intra prediction in which intra largest coding unit (LCU) - prediction is performed by using residual data and decoded samples of - neighboring intra LCU only. Setting the value to 1 enables constant intra - prediction and setting the value to 0 disables constant intra prediction. - -``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)`` - Indicates wavefront parallel processing for HEVC encoder. Setting it to 0 - disables the feature and setting it to 1 enables the wavefront parallel - processing. - -``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)`` - Setting the value to 1 enables combination of P and B frame for HEVC - encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)`` - Indicates temporal identifier for HEVC encoder which is enabled by - setting the value to 1. - -``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)`` - Indicates bi-linear interpolation is conditionally used in the intra - prediction filtering process in the CVS when set to 1. Indicates bi-linear - interpolation is not used in the CVS when set to 0. - -``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)`` - Indicates maximum number of merge candidate motion vectors. - Values are from 0 to 4. - -``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)`` - Indicates temporal motion vector prediction for HEVC encoder. Setting it to - 1 enables the prediction. Setting it to 0 disables the prediction. - -``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)`` - Specifies if HEVC generates a stream with a size of the length field - instead of start code pattern. The size of the length field is configurable - through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD control. Setting - the value to 0 disables encoding without startcode pattern. Setting the - value to 1 will enables encoding without startcode pattern. - -.. _v4l2-hevc-size-of-length-field: - -``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD`` -(enum) - -enum v4l2_mpeg_video_hevc_size_of_length_field - - Indicates the size of length field. - This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled. - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{6.0cm}|p{11.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0`` - - Generate start code pattern (Normal). - * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1`` - - Generate size of length field instead of start code pattern and length is 1. - * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2`` - - Generate size of length field instead of start code pattern and length is 2. - * - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4`` - - Generate size of length field instead of start code pattern and length is 4. - -.. raw:: latex - - \normalsize - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)`` - Indicates bit rate for hierarchical coding layer 0 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)`` - Indicates bit rate for hierarchical coding layer 1 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)`` - Indicates bit rate for hierarchical coding layer 2 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)`` - Indicates bit rate for hierarchical coding layer 3 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)`` - Indicates bit rate for hierarchical coding layer 4 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)`` - Indicates bit rate for hierarchical coding layer 5 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)`` - Indicates bit rate for hierarchical coding layer 6 for HEVC encoder. - -``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)`` - Selects number of P reference pictures required for HEVC encoder. - P-Frame can use 1 or 2 frames for reference. - -``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)`` - Indicates whether to generate SPS and PPS at every IDR. Setting it to 0 - disables generating SPS and PPS at every IDR. Setting it to one enables - generating SPS and PPS at every IDR. - -.. _v4l2-mpeg-hevc: - -``V4L2_CID_MPEG_VIDEO_HEVC_SPS (struct)`` - Specifies the Sequence Parameter Set fields (as extracted from the - bitstream) for the associated HEVC slice data. - These bitstream parameters are defined according to :ref:`hevc`. - They are described in section 7.4.3.2 "Sequence parameter set RBSP - semantics" of the specification. - -.. c:type:: v4l2_ctrl_hevc_sps - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_hevc_sps - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u16 - - ``pic_width_in_luma_samples`` - - - * - __u16 - - ``pic_height_in_luma_samples`` - - - * - __u8 - - ``bit_depth_luma_minus8`` - - - * - __u8 - - ``bit_depth_chroma_minus8`` - - - * - __u8 - - ``log2_max_pic_order_cnt_lsb_minus4`` - - - * - __u8 - - ``sps_max_dec_pic_buffering_minus1`` - - - * - __u8 - - ``sps_max_num_reorder_pics`` - - - * - __u8 - - ``sps_max_latency_increase_plus1`` - - - * - __u8 - - ``log2_min_luma_coding_block_size_minus3`` - - - * - __u8 - - ``log2_diff_max_min_luma_coding_block_size`` - - - * - __u8 - - ``log2_min_luma_transform_block_size_minus2`` - - - * - __u8 - - ``log2_diff_max_min_luma_transform_block_size`` - - - * - __u8 - - ``max_transform_hierarchy_depth_inter`` - - - * - __u8 - - ``max_transform_hierarchy_depth_intra`` - - - * - __u8 - - ``pcm_sample_bit_depth_luma_minus1`` - - - * - __u8 - - ``pcm_sample_bit_depth_chroma_minus1`` - - - * - __u8 - - ``log2_min_pcm_luma_coding_block_size_minus3`` - - - * - __u8 - - ``log2_diff_max_min_pcm_luma_coding_block_size`` - - - * - __u8 - - ``num_short_term_ref_pic_sets`` - - - * - __u8 - - ``num_long_term_ref_pics_sps`` - - - * - __u8 - - ``chroma_format_idc`` - - - * - __u64 - - ``flags`` - - See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>` - -.. _hevc_sps_flags: - -``Sequence Parameter Set Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE`` - - 0x00000001 - - - * - ``V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED`` - - 0x00000002 - - - * - ``V4L2_HEVC_SPS_FLAG_AMP_ENABLED`` - - 0x00000004 - - - * - ``V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET`` - - 0x00000008 - - - * - ``V4L2_HEVC_SPS_FLAG_PCM_ENABLED`` - - 0x00000010 - - - * - ``V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED`` - - 0x00000020 - - - * - ``V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT`` - - 0x00000040 - - - * - ``V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED`` - - 0x00000080 - - - * - ``V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED`` - - 0x00000100 - - - -``V4L2_CID_MPEG_VIDEO_HEVC_PPS (struct)`` - Specifies the Picture Parameter Set fields (as extracted from the - bitstream) for the associated HEVC slice data. - These bitstream parameters are defined according to :ref:`hevc`. - They are described in section 7.4.3.3 "Picture parameter set RBSP - semantics" of the specification. - -.. c:type:: v4l2_ctrl_hevc_pps - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_hevc_pps - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``num_extra_slice_header_bits`` - - - * - __s8 - - ``init_qp_minus26`` - - - * - __u8 - - ``diff_cu_qp_delta_depth`` - - - * - __s8 - - ``pps_cb_qp_offset`` - - - * - __s8 - - ``pps_cr_qp_offset`` - - - * - __u8 - - ``num_tile_columns_minus1`` - - - * - __u8 - - ``num_tile_rows_minus1`` - - - * - __u8 - - ``column_width_minus1[20]`` - - - * - __u8 - - ``row_height_minus1[22]`` - - - * - __s8 - - ``pps_beta_offset_div2`` - - - * - __s8 - - ``pps_tc_offset_div2`` - - - * - __u8 - - ``log2_parallel_merge_level_minus2`` - - - * - __u8 - - ``padding[4]`` - - Applications and drivers must set this to zero. - * - __u64 - - ``flags`` - - See :ref:`Picture Parameter Set Flags <hevc_pps_flags>` - -.. _hevc_pps_flags: - -``Picture Parameter Set Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT`` - - 0x00000001 - - - * - ``V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT`` - - 0x00000002 - - - * - ``V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED`` - - 0x00000004 - - - * - ``V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT`` - - 0x00000008 - - - * - ``V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED`` - - 0x00000010 - - - * - ``V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED`` - - 0x00000020 - - - * - ``V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED`` - - 0x00000040 - - - * - ``V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT`` - - 0x00000080 - - - * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED`` - - 0x00000100 - - - * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED`` - - 0x00000200 - - - * - ``V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED`` - - 0x00000400 - - - * - ``V4L2_HEVC_PPS_FLAG_TILES_ENABLED`` - - 0x00000800 - - - * - ``V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED`` - - 0x00001000 - - - * - ``V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED`` - - 0x00002000 - - - * - ``V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED`` - - 0x00004000 - - - * - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED`` - - 0x00008000 - - - * - ``V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER`` - - 0x00010000 - - - * - ``V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT`` - - 0x00020000 - - - * - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT`` - - 0x00040000 - - - -``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (struct)`` - Specifies various slice-specific parameters, especially from the NAL unit - header, general slice segment header and weighted prediction parameter - parts of the bitstream. - These bitstream parameters are defined according to :ref:`hevc`. - They are described in section 7.4.7 "General slice segment header - semantics" of the specification. - -.. c:type:: v4l2_ctrl_hevc_slice_params - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ctrl_hevc_slice_params - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``bit_size`` - - Size (in bits) of the current slice data. - * - __u32 - - ``data_bit_offset`` - - Offset (in bits) to the video data in the current slice data. - * - __u8 - - ``nal_unit_type`` - - - * - __u8 - - ``nuh_temporal_id_plus1`` - - - * - __u8 - - ``slice_type`` - - - (V4L2_HEVC_SLICE_TYPE_I, V4L2_HEVC_SLICE_TYPE_P or - V4L2_HEVC_SLICE_TYPE_B). - * - __u8 - - ``colour_plane_id`` - - - * - __u16 - - ``slice_pic_order_cnt`` - - - * - __u8 - - ``num_ref_idx_l0_active_minus1`` - - - * - __u8 - - ``num_ref_idx_l1_active_minus1`` - - - * - __u8 - - ``collocated_ref_idx`` - - - * - __u8 - - ``five_minus_max_num_merge_cand`` - - - * - __s8 - - ``slice_qp_delta`` - - - * - __s8 - - ``slice_cb_qp_offset`` - - - * - __s8 - - ``slice_cr_qp_offset`` - - - * - __s8 - - ``slice_act_y_qp_offset`` - - - * - __s8 - - ``slice_act_cb_qp_offset`` - - - * - __s8 - - ``slice_act_cr_qp_offset`` - - - * - __s8 - - ``slice_beta_offset_div2`` - - - * - __s8 - - ``slice_tc_offset_div2`` - - - * - __u8 - - ``pic_struct`` - - - * - __u8 - - ``num_active_dpb_entries`` - - The number of entries in ``dpb``. - * - __u8 - - ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - The list of L0 reference elements as indices in the DPB. - * - __u8 - - ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - The list of L1 reference elements as indices in the DPB. - * - __u8 - - ``num_rps_poc_st_curr_before`` - - The number of reference pictures in the short-term set that come before - the current frame. - * - __u8 - - ``num_rps_poc_st_curr_after`` - - The number of reference pictures in the short-term set that come after - the current frame. - * - __u8 - - ``num_rps_poc_lt_curr`` - - The number of reference pictures in the long-term set. - * - __u8 - - ``padding[7]`` - - Applications and drivers must set this to zero. - * - struct :c:type:`v4l2_hevc_dpb_entry` - - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - The decoded picture buffer, for meta-data about reference frames. - * - struct :c:type:`v4l2_hevc_pred_weight_table` - - ``pred_weight_table`` - - The prediction weight coefficients for inter-picture prediction. - * - __u64 - - ``flags`` - - See :ref:`Slice Parameters Flags <hevc_slice_params_flags>` - -.. _hevc_slice_params_flags: - -``Slice Parameters Flags`` - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA`` - - 0x00000001 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA`` - - 0x00000002 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED`` - - 0x00000004 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO`` - - 0x00000008 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT`` - - 0x00000010 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0`` - - 0x00000020 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV`` - - 0x00000040 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED`` - - 0x00000080 - - - * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED`` - - 0x00000100 - - - -.. c:type:: v4l2_hevc_dpb_entry - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_hevc_dpb_entry - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u64 - - ``timestamp`` - - Timestamp of the V4L2 capture buffer to use as reference, used - with B-coded and P-coded frames. The timestamp refers to the - ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the - :c:func:`v4l2_timeval_to_ns()` function to convert the struct - :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. - * - __u8 - - ``rps`` - - The reference set for the reference frame - (V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_BEFORE, - V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_AFTER or - V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR) - * - __u8 - - ``field_pic`` - - Whether the reference is a field picture or a frame. - * - __u16 - - ``pic_order_cnt[2]`` - - The picture order count of the reference. Only the first element of the - array is used for frame pictures, while the first element identifies the - top field and the second the bottom field in field-coded pictures. - * - __u8 - - ``padding[2]`` - - Applications and drivers must set this to zero. - -.. c:type:: v4l2_hevc_pred_weight_table - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_hevc_pred_weight_table - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``luma_log2_weight_denom`` - - - * - __s8 - - ``delta_chroma_log2_weight_denom`` - - - * - __s8 - - ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - - * - __s8 - - ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - - * - __s8 - - ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` - - - * - __s8 - - ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` - - - * - __s8 - - ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - - * - __s8 - - ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` - - - * - __s8 - - ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` - - - * - __s8 - - ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` - - - * - __u8 - - ``padding[6]`` - - Applications and drivers must set this to zero. - -``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (enum)`` - Specifies the decoding mode to use. Currently exposes slice-based and - frame-based decoding but new modes might be added later on. - This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE - pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE - are required to set this control in order to specify the decoding mode - that is expected for the buffer. - Drivers may expose a single or multiple decoding modes, depending - on what they can support. - - .. note:: - - This menu control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_mpeg_video_hevc_decode_mode - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED`` - - 0 - - Decoding is done at the slice granularity. - The OUTPUT buffer must contain a single slice. - * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_FRAME_BASED`` - - 1 - - Decoding is done at the frame granularity. - The OUTPUT buffer must contain all slices needed to decode the - frame. The OUTPUT buffer must also contain both fields. - -``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (enum)`` - Specifies the HEVC slice start code expected for each slice. - This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE - pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE - are required to set this control in order to specify the start code - that is expected for the buffer. - Drivers may expose a single or multiple start codes, depending - on what they can support. - - .. note:: - - This menu control is not yet part of the public kernel API and - it is expected to change. - -.. c:type:: v4l2_mpeg_video_hevc_start_code - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_NONE`` - - 0 - - Selecting this value specifies that HEVC slices are passed - to the driver without any start code. - * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_ANNEX_B`` - - 1 - - Selecting this value specifies that HEVC slices are expected - to be prefixed by Annex B start codes. According to :ref:`hevc` - valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-detect.rst b/Documentation/media/uapi/v4l/ext-ctrls-detect.rst deleted file mode 100644 index 80981d0cff42..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-detect.rst +++ /dev/null @@ -1,71 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _detect-controls: - -************************ -Detect Control Reference -************************ - -The Detect class includes controls for common features of various motion -or object detection capable devices. - - -.. _detect-control-id: - -Detect Control IDs -================== - -``V4L2_CID_DETECT_CLASS (class)`` - The Detect class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. - -``V4L2_CID_DETECT_MD_MODE (menu)`` - Sets the motion detection mode. - -.. tabularcolumns:: |p{7.7cm}|p{9.8cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_DETECT_MD_MODE_DISABLED`` - - Disable motion detection. - * - ``V4L2_DETECT_MD_MODE_GLOBAL`` - - Use a single motion detection threshold. - * - ``V4L2_DETECT_MD_MODE_THRESHOLD_GRID`` - - The image is divided into a grid, each cell with its own motion - detection threshold. These thresholds are set through the - ``V4L2_CID_DETECT_MD_THRESHOLD_GRID`` matrix control. - * - ``V4L2_DETECT_MD_MODE_REGION_GRID`` - - The image is divided into a grid, each cell with its own region - value that specifies which per-region motion detection thresholds - should be used. Each region has its own thresholds. How these - per-region thresholds are set up is driver-specific. The region - values for the grid are set through the - ``V4L2_CID_DETECT_MD_REGION_GRID`` matrix control. - - - -``V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD (integer)`` - Sets the global motion detection threshold to be used with the - ``V4L2_DETECT_MD_MODE_GLOBAL`` motion detection mode. - -``V4L2_CID_DETECT_MD_THRESHOLD_GRID (__u16 matrix)`` - Sets the motion detection thresholds for each cell in the grid. To - be used with the ``V4L2_DETECT_MD_MODE_THRESHOLD_GRID`` motion - detection mode. Matrix element (0, 0) represents the cell at the - top-left of the grid. - -``V4L2_CID_DETECT_MD_REGION_GRID (__u8 matrix)`` - Sets the motion detection region value for each cell in the grid. To - be used with the ``V4L2_DETECT_MD_MODE_REGION_GRID`` motion - detection mode. Matrix element (0, 0) represents the cell at the - top-left of the grid. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-dv.rst b/Documentation/media/uapi/v4l/ext-ctrls-dv.rst deleted file mode 100644 index 5c70ac98f710..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-dv.rst +++ /dev/null @@ -1,166 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _dv-controls: - -******************************* -Digital Video Control Reference -******************************* - -The Digital Video control class is intended to control receivers and -transmitters for `VGA <http://en.wikipedia.org/wiki/Vga>`__, -`DVI <http://en.wikipedia.org/wiki/Digital_Visual_Interface>`__ -(Digital Visual Interface), HDMI (:ref:`hdmi`) and DisplayPort -(:ref:`dp`). These controls are generally expected to be private to -the receiver or transmitter subdevice that implements them, so they are -only exposed on the ``/dev/v4l-subdev*`` device node. - -.. note:: - - Note that these devices can have multiple input or output pads which are - hooked up to e.g. HDMI connectors. Even though the subdevice will - receive or transmit video from/to only one of those pads, the other pads - can still be active when it comes to EDID (Extended Display - Identification Data, :ref:`vesaedid`) and HDCP (High-bandwidth Digital - Content Protection System, :ref:`hdcp`) processing, allowing the - device to do the fairly slow EDID/HDCP handling in advance. This allows - for quick switching between connectors. - -These pads appear in several of the controls in this section as -bitmasks, one bit for each pad. Bit 0 corresponds to pad 0, bit 1 to pad -1, etc. The maximum value of the control is the set of valid pads. - - -.. _dv-control-id: - -Digital Video Control IDs -========================= - -``V4L2_CID_DV_CLASS (class)`` - The Digital Video class descriptor. - -``V4L2_CID_DV_TX_HOTPLUG (bitmask)`` - Many connectors have a hotplug pin which is high if EDID information - is available from the source. This control shows the state of the - hotplug pin as seen by the transmitter. Each bit corresponds to an - output pad on the transmitter. If an output pad does not have an - associated hotplug pin, then the bit for that pad will be 0. This - read-only control is applicable to DVI-D, HDMI and DisplayPort - connectors. - -``V4L2_CID_DV_TX_RXSENSE (bitmask)`` - Rx Sense is the detection of pull-ups on the TMDS clock lines. This - normally means that the sink has left/entered standby (i.e. the - transmitter can sense that the receiver is ready to receive video). - Each bit corresponds to an output pad on the transmitter. If an - output pad does not have an associated Rx Sense, then the bit for - that pad will be 0. This read-only control is applicable to DVI-D - and HDMI devices. - -``V4L2_CID_DV_TX_EDID_PRESENT (bitmask)`` - When the transmitter sees the hotplug signal from the receiver it - will attempt to read the EDID. If set, then the transmitter has read - at least the first block (= 128 bytes). Each bit corresponds to an - output pad on the transmitter. If an output pad does not support - EDIDs, then the bit for that pad will be 0. This read-only control - is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors. - -``V4L2_CID_DV_TX_MODE`` - (enum) - -enum v4l2_dv_tx_mode - - HDMI transmitters can transmit in DVI-D mode (just video) or in HDMI - mode (video + audio + auxiliary data). This control selects which - mode to use: V4L2_DV_TX_MODE_DVI_D or V4L2_DV_TX_MODE_HDMI. - This control is applicable to HDMI connectors. - -``V4L2_CID_DV_TX_RGB_RANGE`` - (enum) - -enum v4l2_dv_rgb_range - - Select the quantization range for RGB output. V4L2_DV_RANGE_AUTO - follows the RGB quantization range specified in the standard for the - video interface (ie. :ref:`cea861` for HDMI). - V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the - standard to be compatible with sinks that have not implemented the - standard correctly (unfortunately quite common for HDMI and DVI-D). - Full range allows all possible values to be used whereas limited - range sets the range to (16 << (N-8)) - (235 << (N-8)) where N is - the number of bits per component. This control is applicable to VGA, - DVI-A/D, HDMI and DisplayPort connectors. - -``V4L2_CID_DV_TX_IT_CONTENT_TYPE`` - (enum) - -enum v4l2_dv_it_content_type - - Configures the IT Content Type of the transmitted video. This - information is sent over HDMI and DisplayPort connectors as part of - the AVI InfoFrame. The term 'IT Content' is used for content that - originates from a computer as opposed to content from a TV broadcast - or an analog source. The enum v4l2_dv_it_content_type defines - the possible content types: - -.. tabularcolumns:: |p{7.3cm}|p{10.4cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_DV_IT_CONTENT_TYPE_GRAPHICS`` - - Graphics content. Pixel data should be passed unfiltered and - without analog reconstruction. - * - ``V4L2_DV_IT_CONTENT_TYPE_PHOTO`` - - Photo content. The content is derived from digital still pictures. - The content should be passed through with minimal scaling and - picture enhancements. - * - ``V4L2_DV_IT_CONTENT_TYPE_CINEMA`` - - Cinema content. - * - ``V4L2_DV_IT_CONTENT_TYPE_GAME`` - - Game content. Audio and video latency should be minimized. - * - ``V4L2_DV_IT_CONTENT_TYPE_NO_ITC`` - - No IT Content information is available and the ITC bit in the AVI - InfoFrame is set to 0. - - - -``V4L2_CID_DV_RX_POWER_PRESENT (bitmask)`` - Detects whether the receiver receives power from the source (e.g. - HDMI carries 5V on one of the pins). This is often used to power an - eeprom which contains EDID information, such that the source can - read the EDID even if the sink is in standby/power off. Each bit - corresponds to an input pad on the receiver. If an input pad - cannot detect whether power is present, then the bit for that pad - will be 0. This read-only control is applicable to DVI-D, HDMI and - DisplayPort connectors. - -``V4L2_CID_DV_RX_RGB_RANGE`` - (enum) - -enum v4l2_dv_rgb_range - - Select the quantization range for RGB input. V4L2_DV_RANGE_AUTO - follows the RGB quantization range specified in the standard for the - video interface (ie. :ref:`cea861` for HDMI). - V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the - standard to be compatible with sources that have not implemented the - standard correctly (unfortunately quite common for HDMI and DVI-D). - Full range allows all possible values to be used whereas limited - range sets the range to (16 << (N-8)) - (235 << (N-8)) where N is - the number of bits per component. This control is applicable to VGA, - DVI-A/D, HDMI and DisplayPort connectors. - -``V4L2_CID_DV_RX_IT_CONTENT_TYPE`` - (enum) - -enum v4l2_dv_it_content_type - - Reads the IT Content Type of the received video. This information is - sent over HDMI and DisplayPort connectors as part of the AVI - InfoFrame. The term 'IT Content' is used for content that originates - from a computer as opposed to content from a TV broadcast or an - analog source. See ``V4L2_CID_DV_TX_IT_CONTENT_TYPE`` for the - available content types. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-flash.rst b/Documentation/media/uapi/v4l/ext-ctrls-flash.rst deleted file mode 100644 index b9a6b08fbf32..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-flash.rst +++ /dev/null @@ -1,192 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _flash-controls: - -*********************** -Flash Control Reference -*********************** - -The V4L2 flash controls are intended to provide generic access to flash -controller devices. Flash controller devices are typically used in -digital cameras. - -The interface can support both LED and xenon flash devices. As of -writing this, there is no xenon flash driver using this interface. - - -.. _flash-controls-use-cases: - -Supported use cases -=================== - - -Unsynchronised LED flash (software strobe) ------------------------------------------- - -Unsynchronised LED flash is controlled directly by the host as the -sensor. The flash must be enabled by the host before the exposure of the -image starts and disabled once it ends. The host is fully responsible -for the timing of the flash. - -Example of such device: Nokia N900. - - -Synchronised LED flash (hardware strobe) ----------------------------------------- - -The synchronised LED flash is pre-programmed by the host (power and -timeout) but controlled by the sensor through a strobe signal from the -sensor to the flash. - -The sensor controls the flash duration and timing. This information -typically must be made available to the sensor. - - -LED flash as torch ------------------- - -LED flash may be used as torch in conjunction with another use case -involving camera or individually. - - -.. _flash-control-id: - -Flash Control IDs ------------------ - -``V4L2_CID_FLASH_CLASS (class)`` - The FLASH class descriptor. - -``V4L2_CID_FLASH_LED_MODE (menu)`` - Defines the mode of the flash LED, the high-power white LED attached - to the flash controller. Setting this control may not be possible in - presence of some faults. See V4L2_CID_FLASH_FAULT. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_FLASH_LED_MODE_NONE`` - - Off. - * - ``V4L2_FLASH_LED_MODE_FLASH`` - - Flash mode. - * - ``V4L2_FLASH_LED_MODE_TORCH`` - - Torch mode. See V4L2_CID_FLASH_TORCH_INTENSITY. - - - -``V4L2_CID_FLASH_STROBE_SOURCE (menu)`` - Defines the source of the flash LED strobe. - -.. tabularcolumns:: |p{7.5cm}|p{10.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_FLASH_STROBE_SOURCE_SOFTWARE`` - - The flash strobe is triggered by using the - V4L2_CID_FLASH_STROBE control. - * - ``V4L2_FLASH_STROBE_SOURCE_EXTERNAL`` - - The flash strobe is triggered by an external source. Typically - this is a sensor, which makes it possible to synchronise the - flash strobe start to exposure start. - - - -``V4L2_CID_FLASH_STROBE (button)`` - Strobe flash. Valid when V4L2_CID_FLASH_LED_MODE is set to - V4L2_FLASH_LED_MODE_FLASH and V4L2_CID_FLASH_STROBE_SOURCE - is set to V4L2_FLASH_STROBE_SOURCE_SOFTWARE. Setting this - control may not be possible in presence of some faults. See - V4L2_CID_FLASH_FAULT. - -``V4L2_CID_FLASH_STROBE_STOP (button)`` - Stop flash strobe immediately. - -``V4L2_CID_FLASH_STROBE_STATUS (boolean)`` - Strobe status: whether the flash is strobing at the moment or not. - This is a read-only control. - -``V4L2_CID_FLASH_TIMEOUT (integer)`` - Hardware timeout for flash. The flash strobe is stopped after this - period of time has passed from the start of the strobe. - -``V4L2_CID_FLASH_INTENSITY (integer)`` - Intensity of the flash strobe when the flash LED is in flash mode - (V4L2_FLASH_LED_MODE_FLASH). The unit should be milliamps (mA) - if possible. - -``V4L2_CID_FLASH_TORCH_INTENSITY (integer)`` - Intensity of the flash LED in torch mode - (V4L2_FLASH_LED_MODE_TORCH). The unit should be milliamps (mA) - if possible. Setting this control may not be possible in presence of - some faults. See V4L2_CID_FLASH_FAULT. - -``V4L2_CID_FLASH_INDICATOR_INTENSITY (integer)`` - Intensity of the indicator LED. The indicator LED may be fully - independent of the flash LED. The unit should be microamps (uA) if - possible. - -``V4L2_CID_FLASH_FAULT (bitmask)`` - Faults related to the flash. The faults tell about specific problems - in the flash chip itself or the LEDs attached to it. Faults may - prevent further use of some of the flash controls. In particular, - V4L2_CID_FLASH_LED_MODE is set to V4L2_FLASH_LED_MODE_NONE - if the fault affects the flash LED. Exactly which faults have such - an effect is chip dependent. Reading the faults resets the control - and returns the chip to a usable state if possible. - -.. tabularcolumns:: |p{8.4cm}|p{9.1cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_FLASH_FAULT_OVER_VOLTAGE`` - - Flash controller voltage to the flash LED has exceeded the limit - specific to the flash controller. - * - ``V4L2_FLASH_FAULT_TIMEOUT`` - - The flash strobe was still on when the timeout set by the user --- - V4L2_CID_FLASH_TIMEOUT control --- has expired. Not all flash - controllers may set this in all such conditions. - * - ``V4L2_FLASH_FAULT_OVER_TEMPERATURE`` - - The flash controller has overheated. - * - ``V4L2_FLASH_FAULT_SHORT_CIRCUIT`` - - The short circuit protection of the flash controller has been - triggered. - * - ``V4L2_FLASH_FAULT_OVER_CURRENT`` - - Current in the LED power supply has exceeded the limit specific to - the flash controller. - * - ``V4L2_FLASH_FAULT_INDICATOR`` - - The flash controller has detected a short or open circuit - condition on the indicator LED. - * - ``V4L2_FLASH_FAULT_UNDER_VOLTAGE`` - - Flash controller voltage to the flash LED has been below the - minimum limit specific to the flash controller. - * - ``V4L2_FLASH_FAULT_INPUT_VOLTAGE`` - - The input voltage of the flash controller is below the limit under - which strobing the flash at full current will not be possible.The - condition persists until this flag is no longer set. - * - ``V4L2_FLASH_FAULT_LED_OVER_TEMPERATURE`` - - The temperature of the LED has exceeded its allowed upper limit. - - - -``V4L2_CID_FLASH_CHARGE (boolean)`` - Enable or disable charging of the xenon flash capacitor. - -``V4L2_CID_FLASH_READY (boolean)`` - Is the flash ready to strobe? Xenon flashes require their capacitors - charged before strobing. LED flashes often require a cooldown period - after strobe during which another strobe will not be possible. This - is a read-only control. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-fm-rx.rst b/Documentation/media/uapi/v4l/ext-ctrls-fm-rx.rst deleted file mode 100644 index 3ed6dd7f586d..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-fm-rx.rst +++ /dev/null @@ -1,95 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _fm-rx-controls: - -***************************** -FM Receiver Control Reference -***************************** - -The FM Receiver (FM_RX) class includes controls for common features of -FM Reception capable devices. - - -.. _fm-rx-control-id: - -FM_RX Control IDs -================= - -``V4L2_CID_FM_RX_CLASS (class)`` - The FM_RX class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. - -``V4L2_CID_RDS_RECEPTION (boolean)`` - Enables/disables RDS reception by the radio tuner - -``V4L2_CID_RDS_RX_PTY (integer)`` - Gets RDS Programme Type field. This encodes up to 31 pre-defined - programme types. - -``V4L2_CID_RDS_RX_PS_NAME (string)`` - Gets the Programme Service name (PS_NAME). It is intended for - static display on a receiver. It is the primary aid to listeners in - programme service identification and selection. In Annex E of - :ref:`iec62106`, the RDS specification, there is a full - description of the correct character encoding for Programme Service - name strings. Also from RDS specification, PS is usually a single - eight character text. However, it is also possible to find receivers - which can scroll strings sized as 8 x N characters. So, this control - must be configured with steps of 8 characters. The result is it must - always contain a string with size multiple of 8. - -``V4L2_CID_RDS_RX_RADIO_TEXT (string)`` - Gets the Radio Text info. It is a textual description of what is - being broadcasted. RDS Radio Text can be applied when broadcaster - wishes to transmit longer PS names, programme-related information or - any other text. In these cases, RadioText can be used in addition to - ``V4L2_CID_RDS_RX_PS_NAME``. The encoding for Radio Text strings is - also fully described in Annex E of :ref:`iec62106`. The length of - Radio Text strings depends on which RDS Block is being used to - transmit it, either 32 (2A block) or 64 (2B block). However, it is - also possible to find receivers which can scroll strings sized as 32 - x N or 64 x N characters. So, this control must be configured with - steps of 32 or 64 characters. The result is it must always contain a - string with size multiple of 32 or 64. - -``V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT (boolean)`` - If set, then a traffic announcement is in progress. - -``V4L2_CID_RDS_RX_TRAFFIC_PROGRAM (boolean)`` - If set, then the tuned programme carries traffic announcements. - -``V4L2_CID_RDS_RX_MUSIC_SPEECH (boolean)`` - If set, then this channel broadcasts music. If cleared, then it - broadcasts speech. If the transmitter doesn't make this distinction, - then it will be set. - -``V4L2_CID_TUNE_DEEMPHASIS`` - (enum) - -enum v4l2_deemphasis - - Configures the de-emphasis value for reception. A de-emphasis filter - is applied to the broadcast to accentuate the high audio - frequencies. Depending on the region, a time constant of either 50 - or 75 useconds is used. The enum v4l2_deemphasis defines possible - values for de-emphasis. Here they are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_DEEMPHASIS_DISABLED`` - - No de-emphasis is applied. - * - ``V4L2_DEEMPHASIS_50_uS`` - - A de-emphasis of 50 uS is used. - * - ``V4L2_DEEMPHASIS_75_uS`` - - A de-emphasis of 75 uS is used. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-fm-tx.rst b/Documentation/media/uapi/v4l/ext-ctrls-fm-tx.rst deleted file mode 100644 index db88346d99fd..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-fm-tx.rst +++ /dev/null @@ -1,188 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _fm-tx-controls: - -******************************** -FM Transmitter Control Reference -******************************** - -The FM Transmitter (FM_TX) class includes controls for common features -of FM transmissions capable devices. Currently this class includes -parameters for audio compression, pilot tone generation, audio deviation -limiter, RDS transmission and tuning power features. - - -.. _fm-tx-control-id: - -FM_TX Control IDs -================= - -``V4L2_CID_FM_TX_CLASS (class)`` - The FM_TX class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. - -``V4L2_CID_RDS_TX_DEVIATION (integer)`` - Configures RDS signal frequency deviation level in Hz. The range and - step are driver-specific. - -``V4L2_CID_RDS_TX_PI (integer)`` - Sets the RDS Programme Identification field for transmission. - -``V4L2_CID_RDS_TX_PTY (integer)`` - Sets the RDS Programme Type field for transmission. This encodes up - to 31 pre-defined programme types. - -``V4L2_CID_RDS_TX_PS_NAME (string)`` - Sets the Programme Service name (PS_NAME) for transmission. It is - intended for static display on a receiver. It is the primary aid to - listeners in programme service identification and selection. In - Annex E of :ref:`iec62106`, the RDS specification, there is a full - description of the correct character encoding for Programme Service - name strings. Also from RDS specification, PS is usually a single - eight character text. However, it is also possible to find receivers - which can scroll strings sized as 8 x N characters. So, this control - must be configured with steps of 8 characters. The result is it must - always contain a string with size multiple of 8. - -``V4L2_CID_RDS_TX_RADIO_TEXT (string)`` - Sets the Radio Text info for transmission. It is a textual - description of what is being broadcasted. RDS Radio Text can be - applied when broadcaster wishes to transmit longer PS names, - programme-related information or any other text. In these cases, - RadioText should be used in addition to ``V4L2_CID_RDS_TX_PS_NAME``. - The encoding for Radio Text strings is also fully described in Annex - E of :ref:`iec62106`. The length of Radio Text strings depends on - which RDS Block is being used to transmit it, either 32 (2A block) - or 64 (2B block). However, it is also possible to find receivers - which can scroll strings sized as 32 x N or 64 x N characters. So, - this control must be configured with steps of 32 or 64 characters. - The result is it must always contain a string with size multiple of - 32 or 64. - -``V4L2_CID_RDS_TX_MONO_STEREO (boolean)`` - Sets the Mono/Stereo bit of the Decoder Identification code. If set, - then the audio was recorded as stereo. - -``V4L2_CID_RDS_TX_ARTIFICIAL_HEAD (boolean)`` - Sets the - `Artificial Head <http://en.wikipedia.org/wiki/Artificial_head>`__ - bit of the Decoder Identification code. If set, then the audio was - recorded using an artificial head. - -``V4L2_CID_RDS_TX_COMPRESSED (boolean)`` - Sets the Compressed bit of the Decoder Identification code. If set, - then the audio is compressed. - -``V4L2_CID_RDS_TX_DYNAMIC_PTY (boolean)`` - Sets the Dynamic PTY bit of the Decoder Identification code. If set, - then the PTY code is dynamically switched. - -``V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT (boolean)`` - If set, then a traffic announcement is in progress. - -``V4L2_CID_RDS_TX_TRAFFIC_PROGRAM (boolean)`` - If set, then the tuned programme carries traffic announcements. - -``V4L2_CID_RDS_TX_MUSIC_SPEECH (boolean)`` - If set, then this channel broadcasts music. If cleared, then it - broadcasts speech. If the transmitter doesn't make this distinction, - then it should be set. - -``V4L2_CID_RDS_TX_ALT_FREQS_ENABLE (boolean)`` - If set, then transmit alternate frequencies. - -``V4L2_CID_RDS_TX_ALT_FREQS (__u32 array)`` - The alternate frequencies in kHz units. The RDS standard allows for - up to 25 frequencies to be defined. Drivers may support fewer - frequencies so check the array size. - -``V4L2_CID_AUDIO_LIMITER_ENABLED (boolean)`` - Enables or disables the audio deviation limiter feature. The limiter - is useful when trying to maximize the audio volume, minimize - receiver-generated distortion and prevent overmodulation. - -``V4L2_CID_AUDIO_LIMITER_RELEASE_TIME (integer)`` - Sets the audio deviation limiter feature release time. Unit is in - useconds. Step and range are driver-specific. - -``V4L2_CID_AUDIO_LIMITER_DEVIATION (integer)`` - Configures audio frequency deviation level in Hz. The range and step - are driver-specific. - -``V4L2_CID_AUDIO_COMPRESSION_ENABLED (boolean)`` - Enables or disables the audio compression feature. This feature - amplifies signals below the threshold by a fixed gain and compresses - audio signals above the threshold by the ratio of Threshold/(Gain + - Threshold). - -``V4L2_CID_AUDIO_COMPRESSION_GAIN (integer)`` - Sets the gain for audio compression feature. It is a dB value. The - range and step are driver-specific. - -``V4L2_CID_AUDIO_COMPRESSION_THRESHOLD (integer)`` - Sets the threshold level for audio compression freature. It is a dB - value. The range and step are driver-specific. - -``V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME (integer)`` - Sets the attack time for audio compression feature. It is a useconds - value. The range and step are driver-specific. - -``V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME (integer)`` - Sets the release time for audio compression feature. It is a - useconds value. The range and step are driver-specific. - -``V4L2_CID_PILOT_TONE_ENABLED (boolean)`` - Enables or disables the pilot tone generation feature. - -``V4L2_CID_PILOT_TONE_DEVIATION (integer)`` - Configures pilot tone frequency deviation level. Unit is in Hz. The - range and step are driver-specific. - -``V4L2_CID_PILOT_TONE_FREQUENCY (integer)`` - Configures pilot tone frequency value. Unit is in Hz. The range and - step are driver-specific. - -``V4L2_CID_TUNE_PREEMPHASIS`` - (enum) - -enum v4l2_preemphasis - - Configures the pre-emphasis value for broadcasting. A pre-emphasis - filter is applied to the broadcast to accentuate the high audio - frequencies. Depending on the region, a time constant of either 50 - or 75 useconds is used. The enum v4l2_preemphasis defines possible - values for pre-emphasis. Here they are: - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_PREEMPHASIS_DISABLED`` - - No pre-emphasis is applied. - * - ``V4L2_PREEMPHASIS_50_uS`` - - A pre-emphasis of 50 uS is used. - * - ``V4L2_PREEMPHASIS_75_uS`` - - A pre-emphasis of 75 uS is used. - - - -``V4L2_CID_TUNE_POWER_LEVEL (integer)`` - Sets the output power level for signal transmission. Unit is in - dBuV. Range and step are driver-specific. - -``V4L2_CID_TUNE_ANTENNA_CAPACITOR (integer)`` - This selects the value of antenna tuning capacitor manually or - automatically if set to zero. Unit, range and step are - driver-specific. - -For more details about RDS specification, refer to :ref:`iec62106` -document, from CENELEC. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-image-process.rst b/Documentation/media/uapi/v4l/ext-ctrls-image-process.rst deleted file mode 100644 index 22fc2d3e433d..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-image-process.rst +++ /dev/null @@ -1,63 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _image-process-controls: - -******************************* -Image Process Control Reference -******************************* - -The Image Process control class is intended for low-level control of -image processing functions. Unlike ``V4L2_CID_IMAGE_SOURCE_CLASS``, the -controls in this class affect processing the image, and do not control -capturing of it. - - -.. _image-process-control-id: - -Image Process Control IDs -========================= - -``V4L2_CID_IMAGE_PROC_CLASS (class)`` - The IMAGE_PROC class descriptor. - -``V4L2_CID_LINK_FREQ (integer menu)`` - Data bus frequency. Together with the media bus pixel code, bus type - (clock cycles per sample), the data bus frequency defines the pixel - rate (``V4L2_CID_PIXEL_RATE``) in the pixel array (or possibly - elsewhere, if the device is not an image sensor). The frame rate can - be calculated from the pixel clock, image width and height and - horizontal and vertical blanking. While the pixel rate control may - be defined elsewhere than in the subdev containing the pixel array, - the frame rate cannot be obtained from that information. This is - because only on the pixel array it can be assumed that the vertical - and horizontal blanking information is exact: no other blanking is - allowed in the pixel array. The selection of frame rate is performed - by selecting the desired horizontal and vertical blanking. The unit - of this control is Hz. - -``V4L2_CID_PIXEL_RATE (64-bit integer)`` - Pixel rate in the source pads of the subdev. This control is - read-only and its unit is pixels / second. - -``V4L2_CID_TEST_PATTERN (menu)`` - Some capture/display/sensor devices have the capability to generate - test pattern images. These hardware specific test patterns can be - used to test if a device is working properly. - -``V4L2_CID_DEINTERLACING_MODE (menu)`` - The video deinterlacing mode (such as Bob, Weave, ...). The menu items are - driver specific and are documented in :ref:`v4l-drivers`. - -``V4L2_CID_DIGITAL_GAIN (integer)`` - Digital gain is the value by which all colour components - are multiplied by. Typically the digital gain applied is the - control value divided by e.g. 0x100, meaning that to get no - digital gain the control value needs to be 0x100. The no-gain - configuration is also typically the default. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst deleted file mode 100644 index 2d3e2b83d6dd..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst +++ /dev/null @@ -1,67 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _image-source-controls: - -****************************** -Image Source Control Reference -****************************** - -The Image Source control class is intended for low-level control of -image source devices such as image sensors. The devices feature an -analogue to digital converter and a bus transmitter to transmit the -image data out of the device. - - -.. _image-source-control-id: - -Image Source Control IDs -======================== - -``V4L2_CID_IMAGE_SOURCE_CLASS (class)`` - The IMAGE_SOURCE class descriptor. - -``V4L2_CID_VBLANK (integer)`` - Vertical blanking. The idle period after every frame during which no - image data is produced. The unit of vertical blanking is a line. - Every line has length of the image width plus horizontal blanking at - the pixel rate defined by ``V4L2_CID_PIXEL_RATE`` control in the - same sub-device. - -``V4L2_CID_HBLANK (integer)`` - Horizontal blanking. The idle period after every line of image data - during which no image data is produced. The unit of horizontal - blanking is pixels. - -``V4L2_CID_ANALOGUE_GAIN (integer)`` - Analogue gain is gain affecting all colour components in the pixel - matrix. The gain operation is performed in the analogue domain - before A/D conversion. - -``V4L2_CID_TEST_PATTERN_RED (integer)`` - Test pattern red colour component. - -``V4L2_CID_TEST_PATTERN_GREENR (integer)`` - Test pattern green (next to red) colour component. - -``V4L2_CID_TEST_PATTERN_BLUE (integer)`` - Test pattern blue colour component. - -``V4L2_CID_TEST_PATTERN_GREENB (integer)`` - Test pattern green (next to blue) colour component. - -``V4L2_CID_UNIT_CELL_SIZE (struct)`` - This control returns the unit cell size in nanometers. The struct - :c:type:`v4l2_area` provides the width and the height in separate - fields to take into consideration asymmetric pixels. - This control does not take into consideration any possible hardware - binning. - The unit cell consists of the whole area of the pixel, sensitive and - non-sensitive. - This control is required for automatic calibration of sensors/cameras. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-jpeg.rst b/Documentation/media/uapi/v4l/ext-ctrls-jpeg.rst deleted file mode 100644 index 60ce3f949319..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-jpeg.rst +++ /dev/null @@ -1,113 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _jpeg-controls: - -********************** -JPEG Control Reference -********************** - -The JPEG class includes controls for common features of JPEG encoders -and decoders. Currently it includes features for codecs implementing -progressive baseline DCT compression process with Huffman entrophy -coding. - - -.. _jpeg-control-id: - -JPEG Control IDs -================ - -``V4L2_CID_JPEG_CLASS (class)`` - The JPEG class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. - -``V4L2_CID_JPEG_CHROMA_SUBSAMPLING (menu)`` - The chroma subsampling factors describe how each component of an - input image is sampled, in respect to maximum sample rate in each - spatial dimension. See :ref:`itu-t81`, clause A.1.1. for more - details. The ``V4L2_CID_JPEG_CHROMA_SUBSAMPLING`` control determines - how Cb and Cr components are downsampled after converting an input - image from RGB to Y'CbCr color space. - -.. tabularcolumns:: |p{7.5cm}|p{10.0cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_444`` - - No chroma subsampling, each pixel has Y, Cr and Cb values. - * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_422`` - - Horizontally subsample Cr, Cb components by a factor of 2. - * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_420`` - - Subsample Cr, Cb components horizontally and vertically by 2. - * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_411`` - - Horizontally subsample Cr, Cb components by a factor of 4. - * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_410`` - - Subsample Cr, Cb components horizontally by 4 and vertically by 2. - * - ``V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY`` - - Use only luminance component. - - - -``V4L2_CID_JPEG_RESTART_INTERVAL (integer)`` - The restart interval determines an interval of inserting RSTm - markers (m = 0..7). The purpose of these markers is to additionally - reinitialize the encoder process, in order to process blocks of an - image independently. For the lossy compression processes the restart - interval unit is MCU (Minimum Coded Unit) and its value is contained - in DRI (Define Restart Interval) marker. If - ``V4L2_CID_JPEG_RESTART_INTERVAL`` control is set to 0, DRI and RSTm - markers will not be inserted. - -.. _jpeg-quality-control: - -``V4L2_CID_JPEG_COMPRESSION_QUALITY (integer)`` - ``V4L2_CID_JPEG_COMPRESSION_QUALITY`` control determines trade-off - between image quality and size. It provides simpler method for - applications to control image quality, without a need for direct - reconfiguration of luminance and chrominance quantization tables. In - cases where a driver uses quantization tables configured directly by - an application, using interfaces defined elsewhere, - ``V4L2_CID_JPEG_COMPRESSION_QUALITY`` control should be set by - driver to 0. - - The value range of this control is driver-specific. Only positive, - non-zero values are meaningful. The recommended range is 1 - 100, - where larger values correspond to better image quality. - -.. _jpeg-active-marker-control: - -``V4L2_CID_JPEG_ACTIVE_MARKER (bitmask)`` - Specify which JPEG markers are included in compressed stream. This - control is valid only for encoders. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - ``V4L2_JPEG_ACTIVE_MARKER_APP0`` - - Application data segment APP\ :sub:`0`. - * - ``V4L2_JPEG_ACTIVE_MARKER_APP1`` - - Application data segment APP\ :sub:`1`. - * - ``V4L2_JPEG_ACTIVE_MARKER_COM`` - - Comment segment. - * - ``V4L2_JPEG_ACTIVE_MARKER_DQT`` - - Quantization tables segment. - * - ``V4L2_JPEG_ACTIVE_MARKER_DHT`` - - Huffman tables segment. - - - -For more details about JPEG specification, refer to :ref:`itu-t81`, -:ref:`jfif`, :ref:`w3c-jpeg-jfif`. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-rf-tuner.rst b/Documentation/media/uapi/v4l/ext-ctrls-rf-tuner.rst deleted file mode 100644 index 0fb85ba878dd..000000000000 --- a/Documentation/media/uapi/v4l/ext-ctrls-rf-tuner.rst +++ /dev/null @@ -1,96 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _rf-tuner-controls: - -************************** -RF Tuner Control Reference -************************** - -The RF Tuner (RF_TUNER) class includes controls for common features of -devices having RF tuner. - -In this context, RF tuner is radio receiver circuit between antenna and -demodulator. It receives radio frequency (RF) from the antenna and -converts that received signal to lower intermediate frequency (IF) or -baseband frequency (BB). Tuners that could do baseband output are often -called Zero-IF tuners. Older tuners were typically simple PLL tuners -inside a metal box, while newer ones are highly integrated chips -without a metal box "silicon tuners". These controls are mostly -applicable for new feature rich silicon tuners, just because older -tuners does not have much adjustable features. - -For more information about RF tuners see -`Tuner (radio) <http://en.wikipedia.org/wiki/Tuner_%28radio%29>`__ -and `RF front end <http://en.wikipedia.org/wiki/RF_front_end>`__ -from Wikipedia. - - -.. _rf-tuner-control-id: - -RF_TUNER Control IDs -==================== - -``V4L2_CID_RF_TUNER_CLASS (class)`` - The RF_TUNER class descriptor. Calling - :ref:`VIDIOC_QUERYCTRL` for this control will - return a description of this control class. - -``V4L2_CID_RF_TUNER_BANDWIDTH_AUTO (boolean)`` - Enables/disables tuner radio channel bandwidth configuration. In - automatic mode bandwidth configuration is performed by the driver. - -``V4L2_CID_RF_TUNER_BANDWIDTH (integer)`` - Filter(s) on tuner signal path are used to filter signal according - to receiving party needs. Driver configures filters to fulfill - desired bandwidth requirement. Used when - V4L2_CID_RF_TUNER_BANDWIDTH_AUTO is not set. Unit is in Hz. The - range and step are driver-specific. - -``V4L2_CID_RF_TUNER_LNA_GAIN_AUTO (boolean)`` - Enables/disables LNA automatic gain control (AGC) - -``V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO (boolean)`` - Enables/disables mixer automatic gain control (AGC) - -``V4L2_CID_RF_TUNER_IF_GAIN_AUTO (boolean)`` - Enables/disables IF automatic gain control (AGC) - -``V4L2_CID_RF_TUNER_RF_GAIN (integer)`` - The RF amplifier is the very first amplifier on the receiver signal - path, just right after the antenna input. The difference between the - LNA gain and the RF gain in this document is that the LNA gain is - integrated in the tuner chip while the RF gain is a separate chip. - There may be both RF and LNA gain controls in the same device. The - range and step are driver-specific. - -``V4L2_CID_RF_TUNER_LNA_GAIN (integer)`` - LNA (low noise amplifier) gain is first gain stage on the RF tuner - signal path. It is located very close to tuner antenna input. Used - when ``V4L2_CID_RF_TUNER_LNA_GAIN_AUTO`` is not set. See - ``V4L2_CID_RF_TUNER_RF_GAIN`` to understand how RF gain and LNA gain - differs from the each others. The range and step are - driver-specific. - -``V4L2_CID_RF_TUNER_MIXER_GAIN (integer)`` - Mixer gain is second gain stage on the RF tuner signal path. It is - located inside mixer block, where RF signal is down-converted by the - mixer. Used when ``V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO`` is not set. - The range and step are driver-specific. - -``V4L2_CID_RF_TUNER_IF_GAIN (integer)`` - IF gain is last gain stage on the RF tuner signal path. It is - located on output of RF tuner. It controls signal level of - intermediate frequency output or baseband output. Used when - ``V4L2_CID_RF_TUNER_IF_GAIN_AUTO`` is not set. The range and step - are driver-specific. - -``V4L2_CID_RF_TUNER_PLL_LOCK (boolean)`` - Is synthesizer PLL locked? RF tuner is receiving given frequency - when that control is set. This is a read-only control. diff --git a/Documentation/media/uapi/v4l/extended-controls.rst b/Documentation/media/uapi/v4l/extended-controls.rst deleted file mode 100644 index 655362483730..000000000000 --- a/Documentation/media/uapi/v4l/extended-controls.rst +++ /dev/null @@ -1,180 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _extended-controls: - -********************* -Extended Controls API -********************* - - -Introduction -============ - -The control mechanism as originally designed was meant to be used for -user settings (brightness, saturation, etc). However, it turned out to -be a very useful model for implementing more complicated driver APIs -where each driver implements only a subset of a larger API. - -The MPEG encoding API was the driving force behind designing and -implementing this extended control mechanism: the MPEG standard is quite -large and the currently supported hardware MPEG encoders each only -implement a subset of this standard. Further more, many parameters -relating to how the video is encoded into an MPEG stream are specific to -the MPEG encoding chip since the MPEG standard only defines the format -of the resulting MPEG stream, not how the video is actually encoded into -that format. - -Unfortunately, the original control API lacked some features needed for -these new uses and so it was extended into the (not terribly originally -named) extended control API. - -Even though the MPEG encoding API was the first effort to use the -Extended Control API, nowadays there are also other classes of Extended -Controls, such as Camera Controls and FM Transmitter Controls. The -Extended Controls API as well as all Extended Controls classes are -described in the following text. - - -The Extended Control API -======================== - -Three new ioctls are available: -:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, -:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and -:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`. These ioctls act -on arrays of controls (as opposed to the -:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and -:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls that act on a single -control). This is needed since it is often required to atomically change -several controls at once. - -Each of the new ioctls expects a pointer to a struct -:c:type:`v4l2_ext_controls`. This structure -contains a pointer to the control array, a count of the number of -controls in that array and a control class. Control classes are used to -group similar controls into a single class. For example, control class -``V4L2_CTRL_CLASS_USER`` contains all user controls (i. e. all controls -that can also be set using the old :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` -ioctl). Control class ``V4L2_CTRL_CLASS_MPEG`` contains all controls -relating to MPEG encoding, etc. - -All controls in the control array must belong to the specified control -class. An error is returned if this is not the case. - -It is also possible to use an empty control array (``count`` == 0) to check -whether the specified control class is supported. - -The control array is a struct -:c:type:`v4l2_ext_control` array. The -struct :c:type:`v4l2_ext_control` is very similar to -struct :c:type:`v4l2_control`, except for the fact that -it also allows for 64-bit values and pointers to be passed. - -Since the struct :c:type:`v4l2_ext_control` supports -pointers it is now also possible to have controls with compound types -such as N-dimensional arrays and/or structures. You need to specify the -``V4L2_CTRL_FLAG_NEXT_COMPOUND`` when enumerating controls to actually -be able to see such compound controls. In other words, these controls -with compound types should only be used programmatically. - -Since such compound controls need to expose more information about -themselves than is possible with :ref:`VIDIOC_QUERYCTRL <VIDIOC_QUERYCTRL>` -the :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>` ioctl was added. In -particular, this ioctl gives the dimensions of the N-dimensional array if -this control consists of more than one element. - -.. note:: - - #. It is important to realize that due to the flexibility of controls it is - necessary to check whether the control you want to set actually is - supported in the driver and what the valid range of values is. So use - :ref:`VIDIOC_QUERYCTRL` to check this. - - #. It is possible that some of the menu indices in a control of - type ``V4L2_CTRL_TYPE_MENU`` may not be supported (``VIDIOC_QUERYMENU`` - will return an error). A good example is the list of supported MPEG - audio bitrates. Some drivers only support one or two bitrates, others - support a wider range. - -All controls use machine endianness. - - -Enumerating Extended Controls -============================= - -The recommended way to enumerate over the extended controls is by using -:ref:`VIDIOC_QUERYCTRL` in combination with the -``V4L2_CTRL_FLAG_NEXT_CTRL`` flag: - - -.. code-block:: c - - struct v4l2_queryctrl qctrl; - - qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL; - while (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) { - /* ... */ - qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL; - } - -The initial control ID is set to 0 ORed with the -``V4L2_CTRL_FLAG_NEXT_CTRL`` flag. The ``VIDIOC_QUERYCTRL`` ioctl will -return the first control with a higher ID than the specified one. When -no such controls are found an error is returned. - -If you want to get all controls within a specific control class, then -you can set the initial ``qctrl.id`` value to the control class and add -an extra check to break out of the loop when a control of another -control class is found: - - -.. code-block:: c - - qctrl.id = V4L2_CTRL_CLASS_MPEG | V4L2_CTRL_FLAG_NEXT_CTRL; - while (0 == ioctl(fd, VIDIOC_QUERYCTRL, &qctrl)) { - if (V4L2_CTRL_ID2CLASS(qctrl.id) != V4L2_CTRL_CLASS_MPEG) - break; - /* ... */ - qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL; - } - -The 32-bit ``qctrl.id`` value is subdivided into three bit ranges: the -top 4 bits are reserved for flags (e. g. ``V4L2_CTRL_FLAG_NEXT_CTRL``) -and are not actually part of the ID. The remaining 28 bits form the -control ID, of which the most significant 12 bits define the control -class and the least significant 16 bits identify the control within the -control class. It is guaranteed that these last 16 bits are always -non-zero for controls. The range of 0x1000 and up are reserved for -driver-specific controls. The macro ``V4L2_CTRL_ID2CLASS(id)`` returns -the control class ID based on a control ID. - -If the driver does not support extended controls, then -``VIDIOC_QUERYCTRL`` will fail when used in combination with -``V4L2_CTRL_FLAG_NEXT_CTRL``. In that case the old method of enumerating -control should be used (see :ref:`enum_all_controls`). But if it is -supported, then it is guaranteed to enumerate over all controls, -including driver-private controls. - - -Creating Control Panels -======================= - -It is possible to create control panels for a graphical user interface -where the user can select the various controls. Basically you will have -to iterate over all controls using the method described above. Each -control class starts with a control of type -``V4L2_CTRL_TYPE_CTRL_CLASS``. ``VIDIOC_QUERYCTRL`` will return the name -of this control class which can be used as the title of a tab page -within a control panel. - -The flags field of struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` also -contains hints on the behavior of the control. See the -:ref:`VIDIOC_QUERYCTRL` documentation for more -details. diff --git a/Documentation/media/uapi/v4l/field-order.rst b/Documentation/media/uapi/v4l/field-order.rst deleted file mode 100644 index c422bebe4314..000000000000 --- a/Documentation/media/uapi/v4l/field-order.rst +++ /dev/null @@ -1,172 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _field-order: - -*********** -Field Order -*********** - -We have to distinguish between progressive and interlaced video. -Progressive video transmits all lines of a video image sequentially. -Interlaced video divides an image into two fields, containing only the -odd and even lines of the image, respectively. Alternating the so called -odd and even field are transmitted, and due to a small delay between -fields a cathode ray TV displays the lines interleaved, yielding the -original frame. This curious technique was invented because at refresh -rates similar to film the image would fade out too quickly. Transmitting -fields reduces the flicker without the necessity of doubling the frame -rate and with it the bandwidth required for each channel. - -It is important to understand a video camera does not expose one frame -at a time, merely transmitting the frames separated into fields. The -fields are in fact captured at two different instances in time. An -object on screen may well move between one field and the next. For -applications analysing motion it is of paramount importance to recognize -which field of a frame is older, the *temporal order*. - -When the driver provides or accepts images field by field rather than -interleaved, it is also important applications understand how the fields -combine to frames. We distinguish between top (aka odd) and bottom (aka -even) fields, the *spatial order*: The first line of the top field is -the first line of an interlaced frame, the first line of the bottom -field is the second line of that frame. - -However because fields were captured one after the other, arguing -whether a frame commences with the top or bottom field is pointless. Any -two successive top and bottom, or bottom and top fields yield a valid -frame. Only when the source was progressive to begin with, e. g. when -transferring film to video, two fields may come from the same frame, -creating a natural order. - -Counter to intuition the top field is not necessarily the older field. -Whether the older field contains the top or bottom lines is a convention -determined by the video standard. Hence the distinction between temporal -and spatial order of fields. The diagrams below should make this -clearer. - -In V4L it is assumed that all video cameras transmit fields on the media -bus in the same order they were captured, so if the top field was -captured first (is the older field), the top field is also transmitted -first on the bus. - -All video capture and output devices must report the current field -order. Some drivers may permit the selection of a different order, to -this end applications initialize the ``field`` field of struct -:c:type:`v4l2_pix_format` before calling the -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. If this is not desired it -should have the value ``V4L2_FIELD_ANY`` (0). - - -enum v4l2_field -=============== - -.. c:type:: v4l2_field - -.. tabularcolumns:: |p{5.8cm}|p{0.6cm}|p{11.1cm}| - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_FIELD_ANY`` - - 0 - - Applications request this field order when any field format - is acceptable. Drivers choose depending on hardware capabilities or - e.g. the requested image size, and return the actual field order. - Drivers must never return ``V4L2_FIELD_ANY``. - If multiple field orders are possible the - driver must choose one of the possible field orders during - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` or - :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`. struct - :c:type:`v4l2_buffer` ``field`` can never be - ``V4L2_FIELD_ANY``. - * - ``V4L2_FIELD_NONE`` - - 1 - - Images are in progressive (frame-based) format, not interlaced - (field-based). - * - ``V4L2_FIELD_TOP`` - - 2 - - Images consist of the top (aka odd) field only. - * - ``V4L2_FIELD_BOTTOM`` - - 3 - - Images consist of the bottom (aka even) field only. Applications - may wish to prevent a device from capturing interlaced images - because they will have "comb" or "feathering" artefacts around - moving objects. - * - ``V4L2_FIELD_INTERLACED`` - - 4 - - Images contain both fields, interleaved line by line. The temporal - order of the fields (whether the top or bottom field is older) - depends on the current video standard. In M/NTSC the bottom - field is the older field. In all other standards the top field - is the older field. - * - ``V4L2_FIELD_SEQ_TB`` - - 5 - - Images contain both fields, the top field lines are stored first - in memory, immediately followed by the bottom field lines. Fields - are always stored in temporal order, the older one first in - memory. Image sizes refer to the frame, not fields. - * - ``V4L2_FIELD_SEQ_BT`` - - 6 - - Images contain both fields, the bottom field lines are stored - first in memory, immediately followed by the top field lines. - Fields are always stored in temporal order, the older one first in - memory. Image sizes refer to the frame, not fields. - * - ``V4L2_FIELD_ALTERNATE`` - - 7 - - The two fields of a frame are passed in separate buffers, in - temporal order, i. e. the older one first. To indicate the field - parity (whether the current field is a top or bottom field) the - driver or application, depending on data direction, must set - struct :c:type:`v4l2_buffer` ``field`` to - ``V4L2_FIELD_TOP`` or ``V4L2_FIELD_BOTTOM``. Any two successive - fields pair to build a frame. If fields are successive, without - any dropped fields between them (fields can drop individually), - can be determined from the struct - :c:type:`v4l2_buffer` ``sequence`` field. This - format cannot be selected when using the read/write I/O method - since there is no way to communicate if a field was a top or - bottom field. - * - ``V4L2_FIELD_INTERLACED_TB`` - - 8 - - Images contain both fields, interleaved line by line, top field - first. The top field is the older field. - * - ``V4L2_FIELD_INTERLACED_BT`` - - 9 - - Images contain both fields, interleaved line by line, top field - first. The bottom field is the older field. - - - -.. _fieldseq-tb: - -Field Order, Top Field First Transmitted -======================================== - -.. kernel-figure:: fieldseq_tb.svg - :alt: fieldseq_tb.svg - :align: center - - Field Order, Top Field First Transmitted - - -.. _fieldseq-bt: - -Field Order, Bottom Field First Transmitted -=========================================== - -.. kernel-figure:: fieldseq_bt.svg - :alt: fieldseq_bt.svg - :align: center - - Field Order, Bottom Field First Transmitted diff --git a/Documentation/media/uapi/v4l/fieldseq_bt.svg b/Documentation/media/uapi/v4l/fieldseq_bt.svg deleted file mode 100644 index 1dab1cd1b6de..000000000000 --- a/Documentation/media/uapi/v4l/fieldseq_bt.svg +++ /dev/null @@ -1,2621 +0,0 @@ -<?xml version="1.0" encoding="UTF-8" standalone="no"?> -<!-- - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _format: - -************ -Data Formats -************ - - -Data Format Negotiation -======================= - -Different devices exchange different kinds of data with applications, -for example video images, raw or sliced VBI data, RDS datagrams. Even -within one kind many different formats are possible, in particular there is an -abundance of image formats. Although drivers must provide a default and -the selection persists across closing and reopening a device, -applications should always negotiate a data format before engaging in -data exchange. Negotiation means the application asks for a particular -format and the driver selects and reports the best the hardware can do -to satisfy the request. Of course applications can also just query the -current selection. - -A single mechanism exists to negotiate all data formats using the -aggregate struct :c:type:`v4l2_format` and the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls. Additionally the -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl can be used to examine -what the hardware *could* do, without actually selecting a new data -format. The data formats supported by the V4L2 API are covered in the -respective device section in :ref:`devices`. For a closer look at -image formats see :ref:`pixfmt`. - -The :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl is a major turning-point in the -initialization sequence. Prior to this point multiple panel applications -can access the same device concurrently to select the current input, -change controls or modify other properties. The first :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -assigns a logical stream (video data, VBI data etc.) exclusively to one -file descriptor. - -Exclusive means no other application, more precisely no other file -descriptor, can grab this stream or change device properties -inconsistent with the negotiated parameters. A video standard change for -example, when the new standard uses a different number of scan lines, -can invalidate the selected image format. Therefore only the file -descriptor owning the stream can make invalidating changes. Accordingly -multiple file descriptors which grabbed different logical streams -prevent each other from interfering with their settings. When for -example video overlay is about to start or already in progress, -simultaneous video capturing may be restricted to the same cropping and -image size. - -When applications omit the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl its locking side -effects are implied by the next step, the selection of an I/O method -with the :ref:`VIDIOC_REQBUFS` ioctl or implicit -with the first :ref:`read() <func-read>` or -:ref:`write() <func-write>` call. - -Generally only one logical stream can be assigned to a file descriptor, -the exception being drivers permitting simultaneous video capturing and -overlay using the same file descriptor for compatibility with V4L and -earlier versions of V4L2. Switching the logical stream or returning into -"panel mode" is possible by closing and reopening the device. Drivers -*may* support a switch using :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. - -All drivers exchanging data with applications must support the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. Implementation of the -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` is highly recommended but optional. - - -Image Format Enumeration -======================== - -Apart of the generic format negotiation functions a special ioctl to -enumerate all image formats supported by video capture, overlay or -output devices is available. [#f1]_ - -The :ref:`VIDIOC_ENUM_FMT` ioctl must be supported -by all drivers exchanging image data with applications. - -.. important:: - - Drivers are not supposed to convert image formats in kernel space. - They must enumerate only formats directly supported by the hardware. - If necessary driver writers should publish an example conversion - routine or library for integration into applications. - -.. [#f1] - Enumerating formats an application has no a-priori knowledge of - (otherwise it could explicitly ask for them and need not enumerate) - seems useless, but there are applications serving as proxy between - drivers and the actual video applications for which this is useful. diff --git a/Documentation/media/uapi/v4l/func-close.rst b/Documentation/media/uapi/v4l/func-close.rst deleted file mode 100644 index 1a56811b827e..000000000000 --- a/Documentation/media/uapi/v4l/func-close.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-close: - -************ -V4L2 close() -************ - -Name -==== - -v4l2-close - Close a V4L2 device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: int close( int fd ) - :name: v4l2-close - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - - -Description -=========== - -Closes the device. Any I/O in progress is terminated and resources -associated with the file descriptor are freed. However data format -parameters, current input or output, control values or other properties -remain unchanged. - - -Return Value -============ - -The function returns 0 on success, -1 on failure and the ``errno`` is -set appropriately. Possible error codes: - -EBADF - ``fd`` is not a valid open file descriptor. diff --git a/Documentation/media/uapi/v4l/func-ioctl.rst b/Documentation/media/uapi/v4l/func-ioctl.rst deleted file mode 100644 index e7a8cf62752e..000000000000 --- a/Documentation/media/uapi/v4l/func-ioctl.rst +++ /dev/null @@ -1,69 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-ioctl: - -************ -V4L2 ioctl() -************ - -Name -==== - -v4l2-ioctl - Program a V4L2 device - - -Synopsis -======== - -.. code-block:: c - - #include <sys/ioctl.h> - - -.. c:function:: int ioctl( int fd, int request, void *argp ) - :name: v4l2-ioctl - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``request`` - V4L2 ioctl request code as defined in the ``videodev2.h`` header - file, for example VIDIOC_QUERYCAP. - -``argp`` - Pointer to a function parameter, usually a structure. - - -Description -=========== - -The :ref:`ioctl() <func-ioctl>` function is used to program V4L2 devices. The -argument ``fd`` must be an open file descriptor. An ioctl ``request`` -has encoded in it whether the argument is an input, output or read/write -parameter, and the size of the argument ``argp`` in bytes. Macros and -defines specifying V4L2 ioctl requests are located in the -``videodev2.h`` header file. Applications should use their own copy, not -include the version in the kernel sources on the system they compile on. -All V4L2 ioctl requests, their respective function and parameters are -specified in :ref:`user-func`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -When an ioctl that takes an output or read/write parameter fails, the -parameter remains unmodified. diff --git a/Documentation/media/uapi/v4l/func-mmap.rst b/Documentation/media/uapi/v4l/func-mmap.rst deleted file mode 100644 index 75985d80788a..000000000000 --- a/Documentation/media/uapi/v4l/func-mmap.rst +++ /dev/null @@ -1,148 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-mmap: - -*********** -V4L2 mmap() -*********** - -Name -==== - -v4l2-mmap - Map device memory into application address space - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - #include <sys/mman.h> - - -.. c:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset ) - :name: v4l2-mmap - -Arguments -========= - -``start`` - Map the buffer to this address in the application's address space. - When the ``MAP_FIXED`` flag is specified, ``start`` must be a - multiple of the pagesize and mmap will fail when the specified - address cannot be used. Use of this option is discouraged; - applications should just specify a ``NULL`` pointer here. - -``length`` - Length of the memory area to map. This must be the same value as - returned by the driver in the struct - :c:type:`v4l2_buffer` ``length`` field for the - single-planar API, and the same value as returned by the driver in - the struct :c:type:`v4l2_plane` ``length`` field for - the multi-planar API. - -``prot`` - The ``prot`` argument describes the desired memory protection. - Regardless of the device type and the direction of data exchange it - should be set to ``PROT_READ`` | ``PROT_WRITE``, permitting read - and write access to image buffers. Drivers should support at least - this combination of flags. - - .. note:: - - #. The Linux ``videobuf`` kernel module, which is used by some - drivers supports only ``PROT_READ`` | ``PROT_WRITE``. When the - driver does not support the desired protection, the - :ref:`mmap() <func-mmap>` function fails. - - #. Device memory accesses (e. g. the memory on a graphics card - with video capturing hardware) may incur a performance penalty - compared to main memory accesses, or reads may be significantly - slower than writes or vice versa. Other I/O methods may be more - efficient in such case. - -``flags`` - The ``flags`` parameter specifies the type of the mapped object, - mapping options and whether modifications made to the mapped copy of - the page are private to the process or are to be shared with other - references. - - ``MAP_FIXED`` requests that the driver selects no other address than - the one specified. If the specified address cannot be used, - :ref:`mmap() <func-mmap>` will fail. If ``MAP_FIXED`` is specified, - ``start`` must be a multiple of the pagesize. Use of this option is - discouraged. - - One of the ``MAP_SHARED`` or ``MAP_PRIVATE`` flags must be set. - ``MAP_SHARED`` allows applications to share the mapped memory with - other (e. g. child-) processes. - - .. note:: - - The Linux ``videobuf`` module which is used by some - drivers supports only ``MAP_SHARED``. ``MAP_PRIVATE`` requests - copy-on-write semantics. V4L2 applications should not set the - ``MAP_PRIVATE``, ``MAP_DENYWRITE``, ``MAP_EXECUTABLE`` or ``MAP_ANON`` - flags. - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``offset`` - Offset of the buffer in device memory. This must be the same value - as returned by the driver in the struct - :c:type:`v4l2_buffer` ``m`` union ``offset`` field for - the single-planar API, and the same value as returned by the driver - in the struct :c:type:`v4l2_plane` ``m`` union - ``mem_offset`` field for the multi-planar API. - - -Description -=========== - -The :ref:`mmap() <func-mmap>` function asks to map ``length`` bytes starting at -``offset`` in the memory of the device specified by ``fd`` into the -application address space, preferably at address ``start``. This latter -address is a hint only, and is usually specified as 0. - -Suitable length and offset parameters are queried with the -:ref:`VIDIOC_QUERYBUF` ioctl. Buffers must be -allocated with the :ref:`VIDIOC_REQBUFS` ioctl -before they can be queried. - -To unmap buffers the :ref:`munmap() <func-munmap>` function is used. - - -Return Value -============ - -On success :ref:`mmap() <func-mmap>` returns a pointer to the mapped buffer. On -error ``MAP_FAILED`` (-1) is returned, and the ``errno`` variable is set -appropriately. Possible error codes are: - -EBADF - ``fd`` is not a valid file descriptor. - -EACCES - ``fd`` is not open for reading and writing. - -EINVAL - The ``start`` or ``length`` or ``offset`` are not suitable. (E. g. - they are too large, or not aligned on a ``PAGESIZE`` boundary.) - - The ``flags`` or ``prot`` value is not supported. - - No buffers have been allocated with the - :ref:`VIDIOC_REQBUFS` ioctl. - -ENOMEM - Not enough physical or virtual memory was available to complete the - request. diff --git a/Documentation/media/uapi/v4l/func-munmap.rst b/Documentation/media/uapi/v4l/func-munmap.rst deleted file mode 100644 index 0d472d86a036..000000000000 --- a/Documentation/media/uapi/v4l/func-munmap.rst +++ /dev/null @@ -1,65 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-munmap: - -************* -V4L2 munmap() -************* - -Name -==== - -v4l2-munmap - Unmap device memory - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - #include <sys/mman.h> - - -.. c:function:: int munmap( void *start, size_t length ) - :name: v4l2-munmap - -Arguments -========= - -``start`` - Address of the mapped buffer as returned by the - :ref:`mmap() <func-mmap>` function. - -``length`` - Length of the mapped buffer. This must be the same value as given to - :ref:`mmap() <func-mmap>` and returned by the driver in the struct - :c:type:`v4l2_buffer` ``length`` field for the - single-planar API and in the struct - :c:type:`v4l2_plane` ``length`` field for the - multi-planar API. - - -Description -=========== - -Unmaps a previously with the :ref:`mmap() <func-mmap>` function mapped -buffer and frees it, if possible. - - -Return Value -============ - -On success :ref:`munmap() <func-munmap>` returns 0, on failure -1 and the -``errno`` variable is set appropriately: - -EINVAL - The ``start`` or ``length`` is incorrect, or no buffers have been - mapped yet. diff --git a/Documentation/media/uapi/v4l/func-open.rst b/Documentation/media/uapi/v4l/func-open.rst deleted file mode 100644 index a3d149ce6635..000000000000 --- a/Documentation/media/uapi/v4l/func-open.rst +++ /dev/null @@ -1,90 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-open: - -*********** -V4L2 open() -*********** - -Name -==== - -v4l2-open - Open a V4L2 device - - -Synopsis -======== - -.. code-block:: c - - #include <fcntl.h> - - -.. c:function:: int open( const char *device_name, int flags ) - :name: v4l2-open - -Arguments -========= - -``device_name`` - Device to be opened. - -``flags`` - Open flags. Access mode must be ``O_RDWR``. This is just a - technicality, input devices still support only reading and output - devices only writing. - - When the ``O_NONBLOCK`` flag is given, the :ref:`read() <func-read>` - function and the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl will - return the ``EAGAIN`` error code when no data is available or no - buffer is in the driver outgoing queue, otherwise these functions - block until data becomes available. All V4L2 drivers exchanging data - with applications must support the ``O_NONBLOCK`` flag. - - Other flags have no effect. - - -Description -=========== - -To open a V4L2 device applications call :ref:`open() <func-open>` with the -desired device name. This function has no side effects; all data format -parameters, current input or output, control values or other properties -remain unchanged. At the first :ref:`open() <func-open>` call after loading the -driver they will be reset to default values, drivers are never in an -undefined state. - - -Return Value -============ - -On success :ref:`open() <func-open>` returns the new file descriptor. On error --1 is returned, and the ``errno`` variable is set appropriately. -Possible error codes are: - -EACCES - The caller has no permission to access the device. - -EBUSY - The driver does not support multiple opens and the device is already - in use. - -ENXIO - No device corresponding to this device special file exists. - -ENOMEM - Not enough kernel memory was available to complete the request. - -EMFILE - The process already has the maximum number of files open. - -ENFILE - The limit on the total number of files open on the system has been - reached. diff --git a/Documentation/media/uapi/v4l/func-poll.rst b/Documentation/media/uapi/v4l/func-poll.rst deleted file mode 100644 index 4c579ed31358..000000000000 --- a/Documentation/media/uapi/v4l/func-poll.rst +++ /dev/null @@ -1,124 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-poll: - -*********** -V4L2 poll() -*********** - -Name -==== - -v4l2-poll - Wait for some event on a file descriptor - - -Synopsis -======== - -.. code-block:: c - - #include <sys/poll.h> - - -.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout ) - :name: v4l2-poll - -Arguments -========= - - - -Description -=========== - -With the :ref:`poll() <func-poll>` function applications can suspend execution -until the driver has captured data or is ready to accept data for -output. - -When streaming I/O has been negotiated this function waits until a -buffer has been filled by the capture device and can be dequeued with -the :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. For output devices this -function waits until the device is ready to accept a new buffer to be -queued up with the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl for -display. When buffers are already in the outgoing queue of the driver -(capture) or the incoming queue isn't full (display) the function -returns immediately. - -On success :ref:`poll() <func-poll>` returns the number of file descriptors -that have been selected (that is, file descriptors for which the -``revents`` field of the respective :c:func:`struct pollfd` structure -is non-zero). Capture devices set the ``POLLIN`` and ``POLLRDNORM`` -flags in the ``revents`` field, output devices the ``POLLOUT`` and -``POLLWRNORM`` flags. When the function timed out it returns a value of -zero, on failure it returns -1 and the ``errno`` variable is set -appropriately. When the application did not call -:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` the :ref:`poll() <func-poll>` -function succeeds, but sets the ``POLLERR`` flag in the ``revents`` -field. When the application has called -:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` for a capture device but -hasn't yet called :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, the -:ref:`poll() <func-poll>` function succeeds and sets the ``POLLERR`` flag in -the ``revents`` field. For output devices this same situation will cause -:ref:`poll() <func-poll>` to succeed as well, but it sets the ``POLLOUT`` and -``POLLWRNORM`` flags in the ``revents`` field. - -If an event occurred (see :ref:`VIDIOC_DQEVENT`) -then ``POLLPRI`` will be set in the ``revents`` field and -:ref:`poll() <func-poll>` will return. - -When use of the :ref:`read() <func-read>` function has been negotiated and the -driver does not capture yet, the :ref:`poll() <func-poll>` function starts -capturing. When that fails it returns a ``POLLERR`` as above. Otherwise -it waits until data has been captured and can be read. When the driver -captures continuously (as opposed to, for example, still images) the -function may return immediately. - -When use of the :ref:`write() <func-write>` function has been negotiated and the -driver does not stream yet, the :ref:`poll() <func-poll>` function starts -streaming. When that fails it returns a ``POLLERR`` as above. Otherwise -it waits until the driver is ready for a non-blocking -:ref:`write() <func-write>` call. - -If the caller is only interested in events (just ``POLLPRI`` is set in -the ``events`` field), then :ref:`poll() <func-poll>` will *not* start -streaming if the driver does not stream yet. This makes it possible to -just poll for events and not for buffers. - -All drivers implementing the :ref:`read() <func-read>` or :ref:`write() <func-write>` -function or streaming I/O must also support the :ref:`poll() <func-poll>` -function. - -For more details see the :ref:`poll() <func-poll>` manual page. - - -Return Value -============ - -On success, :ref:`poll() <func-poll>` returns the number structures which have -non-zero ``revents`` fields, or zero if the call timed out. On error -1 -is returned, and the ``errno`` variable is set appropriately: - -EBADF - One or more of the ``ufds`` members specify an invalid file - descriptor. - -EBUSY - The driver does not support multiple read or write streams and the - device is already in use. - -EFAULT - ``ufds`` references an inaccessible memory area. - -EINTR - The call was interrupted by a signal. - -EINVAL - The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use - ``getrlimit()`` to obtain this value. diff --git a/Documentation/media/uapi/v4l/func-read.rst b/Documentation/media/uapi/v4l/func-read.rst deleted file mode 100644 index 14aca4d5e8fd..000000000000 --- a/Documentation/media/uapi/v4l/func-read.rst +++ /dev/null @@ -1,140 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-read: - -*********** -V4L2 read() -*********** - -Name -==== - -v4l2-read - Read from a V4L2 device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: ssize_t read( int fd, void *buf, size_t count ) - :name: v4l2-read - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``buf`` - Buffer to be filled - -``count`` - Max number of bytes to read - -Description -=========== - -:ref:`read() <func-read>` attempts to read up to ``count`` bytes from file -descriptor ``fd`` into the buffer starting at ``buf``. The layout of the -data in the buffer is discussed in the respective device interface -section, see ##. If ``count`` is zero, :ref:`read() <func-read>` returns zero -and has no other results. If ``count`` is greater than ``SSIZE_MAX``, -the result is unspecified. Regardless of the ``count`` value each -:ref:`read() <func-read>` call will provide at most one frame (two fields) -worth of data. - -By default :ref:`read() <func-read>` blocks until data becomes available. When -the ``O_NONBLOCK`` flag was given to the :ref:`open() <func-open>` -function it returns immediately with an ``EAGAIN`` error code when no data -is available. The :ref:`select() <func-select>` or -:ref:`poll() <func-poll>` functions can always be used to suspend -execution until data becomes available. All drivers supporting the -:ref:`read() <func-read>` function must also support :ref:`select() <func-select>` and -:ref:`poll() <func-poll>`. - -Drivers can implement read functionality in different ways, using a -single or multiple buffers and discarding the oldest or newest frames -once the internal buffers are filled. - -:ref:`read() <func-read>` never returns a "snapshot" of a buffer being filled. -Using a single buffer the driver will stop capturing when the -application starts reading the buffer until the read is finished. Thus -only the period of the vertical blanking interval is available for -reading, or the capture rate must fall below the nominal frame rate of -the video standard. - -The behavior of :ref:`read() <func-read>` when called during the active picture -period or the vertical blanking separating the top and bottom field -depends on the discarding policy. A driver discarding the oldest frames -keeps capturing into an internal buffer, continuously overwriting the -previously, not read frame, and returns the frame being received at the -time of the :ref:`read() <func-read>` call as soon as it is complete. - -A driver discarding the newest frames stops capturing until the next -:ref:`read() <func-read>` call. The frame being received at :ref:`read() <func-read>` -time is discarded, returning the following frame instead. Again this -implies a reduction of the capture rate to one half or less of the -nominal frame rate. An example of this model is the video read mode of -the bttv driver, initiating a DMA to user memory when :ref:`read() <func-read>` -is called and returning when the DMA finished. - -In the multiple buffer model drivers maintain a ring of internal -buffers, automatically advancing to the next free buffer. This allows -continuous capturing when the application can empty the buffers fast -enough. Again, the behavior when the driver runs out of free buffers -depends on the discarding policy. - -Applications can get and set the number of buffers used internally by -the driver with the :ref:`VIDIOC_G_PARM <VIDIOC_G_PARM>` and -:ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctls. They are optional, -however. The discarding policy is not reported and cannot be changed. -For minimum requirements see :ref:`devices`. - - -Return Value -============ - -On success, the number of bytes read is returned. It is not an error if -this number is smaller than the number of bytes requested, or the amount -of data required for one frame. This may happen for example because -:ref:`read() <func-read>` was interrupted by a signal. On error, -1 is -returned, and the ``errno`` variable is set appropriately. In this case -the next read will start at the beginning of a new frame. Possible error -codes are: - -EAGAIN - Non-blocking I/O has been selected using O_NONBLOCK and no data was - immediately available for reading. - -EBADF - ``fd`` is not a valid file descriptor or is not open for reading, or - the process already has the maximum number of files open. - -EBUSY - The driver does not support multiple read streams and the device is - already in use. - -EFAULT - ``buf`` references an inaccessible memory area. - -EINTR - The call was interrupted by a signal before any data was read. - -EIO - I/O error. This indicates some hardware problem or a failure to - communicate with a remote device (USB camera etc.). - -EINVAL - The :ref:`read() <func-read>` function is not supported by this driver, not - on this device, or generally not on this type of device. diff --git a/Documentation/media/uapi/v4l/func-select.rst b/Documentation/media/uapi/v4l/func-select.rst deleted file mode 100644 index af5f1e31c0fb..000000000000 --- a/Documentation/media/uapi/v4l/func-select.rst +++ /dev/null @@ -1,127 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-select: - -************* -V4L2 select() -************* - -Name -==== - -v4l2-select - Synchronous I/O multiplexing - - -Synopsis -======== - -.. code-block:: c - - #include <sys/time.h> - #include <sys/types.h> - #include <unistd.h> - - -.. c:function:: int select( int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout ) - :name: v4l2-select - -Arguments -========= - -``nfds`` - The highest-numbered file descriptor in any of the three sets, plus 1. - -``readfds`` - File descriptions to be watched if a read() call won't block. - -``writefds`` - File descriptions to be watched if a write() won't block. - -``exceptfds`` - File descriptions to be watched for V4L2 events. - -``timeout`` - Maximum time to wait. - - -Description -=========== - -With the :ref:`select() <func-select>` function applications can suspend -execution until the driver has captured data or is ready to accept data -for output. - -When streaming I/O has been negotiated this function waits until a -buffer has been filled or displayed and can be dequeued with the -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. When buffers are already in -the outgoing queue of the driver the function returns immediately. - -On success :ref:`select() <func-select>` returns the total number of bits set in -:c:func:`struct fd_set`. When the function timed out it returns -a value of zero. On failure it returns -1 and the ``errno`` variable is -set appropriately. When the application did not call -:ref:`VIDIOC_QBUF` or -:ref:`VIDIOC_STREAMON` yet the :ref:`select() <func-select>` -function succeeds, setting the bit of the file descriptor in ``readfds`` -or ``writefds``, but subsequent :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` -calls will fail. [#f1]_ - -When use of the :ref:`read() <func-read>` function has been negotiated and the -driver does not capture yet, the :ref:`select() <func-select>` function starts -capturing. When that fails, :ref:`select() <func-select>` returns successful and -a subsequent :ref:`read() <func-read>` call, which also attempts to start -capturing, will return an appropriate error code. When the driver -captures continuously (as opposed to, for example, still images) and -data is already available the :ref:`select() <func-select>` function returns -immediately. - -When use of the :ref:`write() <func-write>` function has been negotiated the -:ref:`select() <func-select>` function just waits until the driver is ready for a -non-blocking :ref:`write() <func-write>` call. - -All drivers implementing the :ref:`read() <func-read>` or :ref:`write() <func-write>` -function or streaming I/O must also support the :ref:`select() <func-select>` -function. - -For more details see the :ref:`select() <func-select>` manual page. - - -Return Value -============ - -On success, :ref:`select() <func-select>` returns the number of descriptors -contained in the three returned descriptor sets, which will be zero if -the timeout expired. On error -1 is returned, and the ``errno`` variable -is set appropriately; the sets and ``timeout`` are undefined. Possible -error codes are: - -EBADF - One or more of the file descriptor sets specified a file descriptor - that is not open. - -EBUSY - The driver does not support multiple read or write streams and the - device is already in use. - -EFAULT - The ``readfds``, ``writefds``, ``exceptfds`` or ``timeout`` pointer - references an inaccessible memory area. - -EINTR - The call was interrupted by a signal. - -EINVAL - The ``nfds`` argument is less than zero or greater than - ``FD_SETSIZE``. - -.. [#f1] - The Linux kernel implements :ref:`select() <func-select>` like the - :ref:`poll() <func-poll>` function, but :ref:`select() <func-select>` cannot - return a ``POLLERR``. diff --git a/Documentation/media/uapi/v4l/func-write.rst b/Documentation/media/uapi/v4l/func-write.rst deleted file mode 100644 index 865129c726ad..000000000000 --- a/Documentation/media/uapi/v4l/func-write.rst +++ /dev/null @@ -1,91 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _func-write: - -************ -V4L2 write() -************ - -Name -==== - -v4l2-write - Write to a V4L2 device - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - - -.. c:function:: ssize_t write( int fd, void *buf, size_t count ) - :name: v4l2-write - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``buf`` - Buffer with data to be written - -``count`` - Number of bytes at the buffer - -Description -=========== - -:ref:`write() <func-write>` writes up to ``count`` bytes to the device -referenced by the file descriptor ``fd`` from the buffer starting at -``buf``. When the hardware outputs are not active yet, this function -enables them. When ``count`` is zero, :ref:`write() <func-write>` returns 0 -without any other effect. - -When the application does not provide more data in time, the previous -video frame, raw VBI image, sliced VPS or WSS data is displayed again. -Sliced Teletext or Closed Caption data is not repeated, the driver -inserts a blank line instead. - - -Return Value -============ - -On success, the number of bytes written are returned. Zero indicates -nothing was written. On error, -1 is returned, and the ``errno`` -variable is set appropriately. In this case the next write will start at -the beginning of a new frame. Possible error codes are: - -EAGAIN - Non-blocking I/O has been selected using the - :ref:`O_NONBLOCK <func-open>` flag and no buffer space was - available to write the data immediately. - -EBADF - ``fd`` is not a valid file descriptor or is not open for writing. - -EBUSY - The driver does not support multiple write streams and the device is - already in use. - -EFAULT - ``buf`` references an inaccessible memory area. - -EINTR - The call was interrupted by a signal before any data was written. - -EIO - I/O error. This indicates some hardware problem. - -EINVAL - The :ref:`write() <func-write>` function is not supported by this driver, - not on this device, or generally not on this type of device. diff --git a/Documentation/media/uapi/v4l/hist-v4l2.rst b/Documentation/media/uapi/v4l/hist-v4l2.rst deleted file mode 100644 index 9e097f34cb74..000000000000 --- a/Documentation/media/uapi/v4l/hist-v4l2.rst +++ /dev/null @@ -1,1374 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _hist-v4l2: - -*********************** -Changes of the V4L2 API -*********************** - -Soon after the V4L API was added to the kernel it was criticised as too -inflexible. In August 1998 Bill Dirks proposed a number of improvements -and began to work on documentation, example drivers and applications. -With the help of other volunteers this eventually became the V4L2 API, -not just an extension but a replacement for the V4L API. However it took -another four years and two stable kernel releases until the new API was -finally accepted for inclusion into the kernel in its present form. - - -Early Versions -============== - -1998-08-20: First version. - -1998-08-27: The :ref:`select() <func-select>` function was introduced. - -1998-09-10: New video standard interface. - -1998-09-18: The ``VIDIOC_NONCAP`` ioctl was replaced by the otherwise -meaningless ``O_TRUNC`` :ref:`open() <func-open>` flag, and the -aliases ``O_NONCAP`` and ``O_NOIO`` were defined. Applications can set -this flag if they intend to access controls only, as opposed to capture -applications which need exclusive access. The ``VIDEO_STD_XXX`` -identifiers are now ordinals instead of flags, and the -``video_std_construct()`` helper function takes id and -transmission arguments. - -1998-09-28: Revamped video standard. Made video controls individually -enumerable. - -1998-10-02: The ``id`` field was removed from struct -struct ``video_standard`` and the color subcarrier fields were -renamed. The :ref:`VIDIOC_QUERYSTD` ioctl was -renamed to :ref:`VIDIOC_ENUMSTD`, -:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` to -:ref:`VIDIOC_ENUMINPUT`. A first draft of the -Codec API was released. - -1998-11-08: Many minor changes. Most symbols have been renamed. Some -material changes to struct :c:type:`v4l2_capability`. - -1998-11-12: The read/write directon of some ioctls was misdefined. - -1998-11-14: ``V4L2_PIX_FMT_RGB24`` changed to ``V4L2_PIX_FMT_BGR24``, -and ``V4L2_PIX_FMT_RGB32`` changed to ``V4L2_PIX_FMT_BGR32``. Audio -controls are now accessible with the -:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` and -:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls under names starting -with ``V4L2_CID_AUDIO``. The ``V4L2_MAJOR`` define was removed from -``videodev.h`` since it was only used once in the ``videodev`` kernel -module. The ``YUV422`` and ``YUV411`` planar image formats were added. - -1998-11-28: A few ioctl symbols changed. Interfaces for codecs and video -output devices were added. - -1999-01-14: A raw VBI capture interface was added. - -1999-01-19: The ``VIDIOC_NEXTBUF`` ioctl was removed. - - -V4L2 Version 0.16 1999-01-31 -============================ - -1999-01-27: There is now one QBUF ioctl, VIDIOC_QWBUF and VIDIOC_QRBUF -are gone. VIDIOC_QBUF takes a v4l2_buffer as a parameter. Added -digital zoom (cropping) controls. - - -V4L2 Version 0.18 1999-03-16 -============================ - -Added a v4l to V4L2 ioctl compatibility layer to videodev.c. Driver -writers, this changes how you implement your ioctl handler. See the -Driver Writer's Guide. Added some more control id codes. - - -V4L2 Version 0.19 1999-06-05 -============================ - -1999-03-18: Fill in the category and catname fields of v4l2_queryctrl -objects before passing them to the driver. Required a minor change to -the VIDIOC_QUERYCTRL handlers in the sample drivers. - -1999-03-31: Better compatibility for v4l memory capture ioctls. Requires -changes to drivers to fully support new compatibility features, see -Driver Writer's Guide and v4l2cap.c. Added new control IDs: -V4L2_CID_HFLIP, _VFLIP. Changed V4L2_PIX_FMT_YUV422P to _YUV422P, -and _YUV411P to _YUV411P. - -1999-04-04: Added a few more control IDs. - -1999-04-07: Added the button control type. - -1999-05-02: Fixed a typo in videodev.h, and added the -V4L2_CTRL_FLAG_GRAYED (later V4L2_CTRL_FLAG_GRABBED) flag. - -1999-05-20: Definition of VIDIOC_G_CTRL was wrong causing a -malfunction of this ioctl. - -1999-06-05: Changed the value of V4L2_CID_WHITENESS. - - -V4L2 Version 0.20 (1999-09-10) -============================== - -Version 0.20 introduced a number of changes which were *not backward -compatible* with 0.19 and earlier versions. Purpose of these changes was -to simplify the API, while making it more extensible and following -common Linux driver API conventions. - -1. Some typos in ``V4L2_FMT_FLAG`` symbols were fixed. struct - :c:type:`v4l2_clip` was changed for compatibility with - v4l. (1999-08-30) - -2. ``V4L2_TUNER_SUB_LANG1`` was added. (1999-09-05) - -3. All ioctl() commands that used an integer argument now take a pointer - to an integer. Where it makes sense, ioctls will return the actual - new value in the integer pointed to by the argument, a common - convention in the V4L2 API. The affected ioctls are: VIDIOC_PREVIEW, - VIDIOC_STREAMON, VIDIOC_STREAMOFF, VIDIOC_S_FREQ, - VIDIOC_S_INPUT, VIDIOC_S_OUTPUT, VIDIOC_S_EFFECT. For example - - - .. code-block:: c - - err = ioctl (fd, VIDIOC_XXX, V4L2_XXX); - - becomes - - - .. code-block:: c - - int a = V4L2_XXX; err = ioctl(fd, VIDIOC_XXX, &a); - -4. All the different get- and set-format commands were swept into one - :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl taking a union and a - type field selecting the union member as parameter. Purpose is to - simplify the API by eliminating several ioctls and to allow new and - driver private data streams without adding new ioctls. - - This change obsoletes the following ioctls: ``VIDIOC_S_INFMT``, - ``VIDIOC_G_INFMT``, ``VIDIOC_S_OUTFMT``, ``VIDIOC_G_OUTFMT``, - ``VIDIOC_S_VBIFMT`` and ``VIDIOC_G_VBIFMT``. The image format - structure struct :c:type:`v4l2_format` was renamed to struct - :c:type:`v4l2_pix_format`, while struct - :c:type:`v4l2_format` is now the envelopping structure - for all format negotiations. - -5. Similar to the changes above, the ``VIDIOC_G_PARM`` and - ``VIDIOC_S_PARM`` ioctls were merged with ``VIDIOC_G_OUTPARM`` and - ``VIDIOC_S_OUTPARM``. A ``type`` field in the new struct - :c:type:`v4l2_streamparm` selects the respective - union member. - - This change obsoletes the ``VIDIOC_G_OUTPARM`` and - ``VIDIOC_S_OUTPARM`` ioctls. - -6. Control enumeration was simplified, and two new control flags were - introduced and one dropped. The ``catname`` field was replaced by a - ``group`` field. - - Drivers can now flag unsupported and temporarily unavailable controls - with ``V4L2_CTRL_FLAG_DISABLED`` and ``V4L2_CTRL_FLAG_GRABBED`` - respectively. The ``group`` name indicates a possibly narrower - classification than the ``category``. In other words, there may be - multiple groups within a category. Controls within a group would - typically be drawn within a group box. Controls in different - categories might have a greater separation, or may even appear in - separate windows. - -7. The struct :c:type:`v4l2_buffer` ``timestamp`` was - changed to a 64 bit integer, containing the sampling or output time - of the frame in nanoseconds. Additionally timestamps will be in - absolute system time, not starting from zero at the beginning of a - stream. The data type name for timestamps is stamp_t, defined as a - signed 64-bit integer. Output devices should not send a buffer out - until the time in the timestamp field has arrived. I would like to - follow SGI's lead, and adopt a multimedia timestamping system like - their UST (Unadjusted System Time). See - http://web.archive.org/web/\*/http://reality.sgi.com - /cpirazzi_engr/lg/time/intro.html. UST uses timestamps that are - 64-bit signed integers (not struct timeval's) and given in nanosecond - units. The UST clock starts at zero when the system is booted and - runs continuously and uniformly. It takes a little over 292 years for - UST to overflow. There is no way to set the UST clock. The regular - Linux time-of-day clock can be changed periodically, which would - cause errors if it were being used for timestamping a multimedia - stream. A real UST style clock will require some support in the - kernel that is not there yet. But in anticipation, I will change the - timestamp field to a 64-bit integer, and I will change the - v4l2_masterclock_gettime() function (used only by drivers) to - return a 64-bit integer. - -8. A ``sequence`` field was added to struct - :c:type:`v4l2_buffer`. The ``sequence`` field counts - captured frames, it is ignored by output devices. When a capture - driver drops a frame, the sequence number of that frame is skipped. - - -V4L2 Version 0.20 incremental changes -===================================== - -1999-12-23: In struct :c:type:`v4l2_vbi_format` the -``reserved1`` field became ``offset``. Previously drivers were required -to clear the ``reserved1`` field. - -2000-01-13: The ``V4L2_FMT_FLAG_NOT_INTERLACED`` flag was added. - -2000-07-31: The ``linux/poll.h`` header is now included by -``videodev.h`` for compatibility with the original ``videodev.h`` file. - -2000-11-20: ``V4L2_TYPE_VBI_OUTPUT`` and ``V4L2_PIX_FMT_Y41P`` were -added. - -2000-11-25: ``V4L2_TYPE_VBI_INPUT`` was added. - -2000-12-04: A couple typos in symbol names were fixed. - -2001-01-18: To avoid namespace conflicts the ``fourcc`` macro defined in -the ``videodev.h`` header file was renamed to ``v4l2_fourcc``. - -2001-01-25: A possible driver-level compatibility problem between the -``videodev.h`` file in Linux 2.4.0 and the ``videodev.h`` file included -in the ``videodevX`` patch was fixed. Users of an earlier version of -``videodevX`` on Linux 2.4.0 should recompile their V4L and V4L2 -drivers. - -2001-01-26: A possible kernel-level incompatibility between the -``videodev.h`` file in the ``videodevX`` patch and the ``videodev.h`` -file in Linux 2.2.x with devfs patches applied was fixed. - -2001-03-02: Certain V4L ioctls which pass data in both direction -although they are defined with read-only parameter, did not work -correctly through the backward compatibility layer. [Solution?] - -2001-04-13: Big endian 16-bit RGB formats were added. - -2001-09-17: New YUV formats and the -:ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` and -:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctls were added. -(The old ``VIDIOC_G_FREQ`` and ``VIDIOC_S_FREQ`` ioctls did not take -multiple tuners into account.) - -2000-09-18: ``V4L2_BUF_TYPE_VBI`` was added. This may *break -compatibility* as the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctls may fail now if the struct -struct ``v4l2_fmt`` ``type`` field does not contain -``V4L2_BUF_TYPE_VBI``. In the documentation of the struct -:c:type:`v4l2_vbi_format` ``offset`` field the -ambiguous phrase "rising edge" was changed to "leading edge". - - -V4L2 Version 0.20 2000-11-23 -============================ - -A number of changes were made to the raw VBI interface. - -1. Figures clarifying the line numbering scheme were added to the V4L2 - API specification. The ``start``\ [0] and ``start``\ [1] fields no - longer count line numbers beginning at zero. Rationale: a) The - previous definition was unclear. b) The ``start``\ [] values are - ordinal numbers. c) There is no point in inventing a new line - numbering scheme. We now use line number as defined by ITU-R, period. - Compatibility: Add one to the start values. Applications depending on - the previous semantics may not function correctly. - -2. The restriction "count[0] > 0 and count[1] > 0" has been relaxed to - "(count[0] + count[1]) > 0". Rationale: Drivers may allocate - resources at scan line granularity and some data services are - transmitted only on the first field. The comment that both ``count`` - values will usually be equal is misleading and pointless and has been - removed. This change *breaks compatibility* with earlier versions: - Drivers may return ``EINVAL``, applications may not function correctly. - -3. Drivers are again permitted to return negative (unknown) start values - as proposed earlier. Why this feature was dropped is unclear. This - change may *break compatibility* with applications depending on the - start values being positive. The use of ``EBUSY`` and ``EINVAL`` - error codes with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl was - clarified. The ``EBUSY`` error code was finally documented, and the - ``reserved2`` field which was previously mentioned only in the - ``videodev.h`` header file. - -4. New buffer types ``V4L2_TYPE_VBI_INPUT`` and ``V4L2_TYPE_VBI_OUTPUT`` - were added. The former is an alias for the old ``V4L2_TYPE_VBI``, the - latter was missing in the ``videodev.h`` file. - - -V4L2 Version 0.20 2002-07-25 -============================ - -Added sliced VBI interface proposal. - - -V4L2 in Linux 2.5.46, 2002-10 -============================= - -Around October-November 2002, prior to an announced feature freeze of -Linux 2.5, the API was revised, drawing from experience with V4L2 0.20. -This unnamed version was finally merged into Linux 2.5.46. - -1. As specified in :ref:`related`, drivers must make related device - functions available under all minor device numbers. - -2. The :ref:`open() <func-open>` function requires access mode - ``O_RDWR`` regardless of the device type. All V4L2 drivers - exchanging data with applications must support the ``O_NONBLOCK`` - flag. The ``O_NOIO`` flag, a V4L2 symbol which aliased the - meaningless ``O_TRUNC`` to indicate accesses without data exchange - (panel applications) was dropped. Drivers must stay in "panel mode" - until the application attempts to initiate a data exchange, see - :ref:`open`. - -3. The struct :c:type:`v4l2_capability` changed - dramatically. Note that also the size of the structure changed, - which is encoded in the ioctl request code, thus older V4L2 devices - will respond with an ``EINVAL`` error code to the new - :ref:`VIDIOC_QUERYCAP` ioctl. - - There are new fields to identify the driver, a new RDS device - function ``V4L2_CAP_RDS_CAPTURE``, the ``V4L2_CAP_AUDIO`` flag - indicates if the device has any audio connectors, another I/O - capability ``V4L2_CAP_ASYNCIO`` can be flagged. In response to these - changes the ``type`` field became a bit set and was merged into the - ``flags`` field. ``V4L2_FLAG_TUNER`` was renamed to - ``V4L2_CAP_TUNER``, ``V4L2_CAP_VIDEO_OVERLAY`` replaced - ``V4L2_FLAG_PREVIEW`` and ``V4L2_CAP_VBI_CAPTURE`` and - ``V4L2_CAP_VBI_OUTPUT`` replaced ``V4L2_FLAG_DATA_SERVICE``. - ``V4L2_FLAG_READ`` and ``V4L2_FLAG_WRITE`` were merged into - ``V4L2_CAP_READWRITE``. - - The redundant fields ``inputs``, ``outputs`` and ``audios`` were - removed. These properties can be determined as described in - :ref:`video` and :ref:`audio`. - - The somewhat volatile and therefore barely useful fields - ``maxwidth``, ``maxheight``, ``minwidth``, ``minheight``, - ``maxframerate`` were removed. This information is available as - described in :ref:`format` and :ref:`standard`. - - ``V4L2_FLAG_SELECT`` was removed. We believe the select() function - is important enough to require support of it in all V4L2 drivers - exchanging data with applications. The redundant - ``V4L2_FLAG_MONOCHROME`` flag was removed, this information is - available as described in :ref:`format`. - -4. In struct :c:type:`v4l2_input` the ``assoc_audio`` - field and the ``capability`` field and its only flag - ``V4L2_INPUT_CAP_AUDIO`` was replaced by the new ``audioset`` field. - Instead of linking one video input to one audio input this field - reports all audio inputs this video input combines with. - - New fields are ``tuner`` (reversing the former link from tuners to - video inputs), ``std`` and ``status``. - - Accordingly struct :c:type:`v4l2_output` lost its - ``capability`` and ``assoc_audio`` fields. ``audioset``, - ``modulator`` and ``std`` where added instead. - -5. The struct :c:type:`v4l2_audio` field ``audio`` was - renamed to ``index``, for consistency with other structures. A new - capability flag ``V4L2_AUDCAP_STEREO`` was added to indicated if the - audio input in question supports stereo sound. - ``V4L2_AUDCAP_EFFECTS`` and the corresponding ``V4L2_AUDMODE`` flags - where removed. This can be easily implemented using controls. - (However the same applies to AVL which is still there.) - - Again for consistency the struct - :c:type:`v4l2_audioout` field ``audio`` was renamed - to ``index``. - -6. The struct :c:type:`v4l2_tuner` ``input`` field was - replaced by an ``index`` field, permitting devices with multiple - tuners. The link between video inputs and tuners is now reversed, - inputs point to their tuner. The ``std`` substructure became a - simple set (more about this below) and moved into struct - :c:type:`v4l2_input`. A ``type`` field was added. - - Accordingly in struct :c:type:`v4l2_modulator` the - ``output`` was replaced by an ``index`` field. - - In struct :c:type:`v4l2_frequency` the ``port`` - field was replaced by a ``tuner`` field containing the respective - tuner or modulator index number. A tuner ``type`` field was added - and the ``reserved`` field became larger for future extensions - (satellite tuners in particular). - -7. The idea of completely transparent video standards was dropped. - Experience showed that applications must be able to work with video - standards beyond presenting the user a menu. Instead of enumerating - supported standards with an ioctl applications can now refer to - standards by :ref:`v4l2_std_id <v4l2-std-id>` and symbols - defined in the ``videodev2.h`` header file. For details see - :ref:`standard`. The :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and - :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` now take a pointer to this - type as argument. :ref:`VIDIOC_QUERYSTD` was - added to autodetect the received standard, if the hardware has this - capability. In struct :c:type:`v4l2_standard` an - ``index`` field was added for - :ref:`VIDIOC_ENUMSTD`. A - :ref:`v4l2_std_id <v4l2-std-id>` field named ``id`` was added as - machine readable identifier, also replacing the ``transmission`` - field. The misleading ``framerate`` field was renamed to - ``frameperiod``. The now obsolete ``colorstandard`` information, - originally needed to distguish between variations of standards, were - removed. - - Struct ``v4l2_enumstd`` ceased to be. - :ref:`VIDIOC_ENUMSTD` now takes a pointer to a - struct :c:type:`v4l2_standard` directly. The - information which standards are supported by a particular video - input or output moved into struct :c:type:`v4l2_input` - and struct :c:type:`v4l2_output` fields named ``std``, - respectively. - -8. The struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` fields - ``category`` and ``group`` did not catch on and/or were not - implemented as expected and therefore removed. - -9. The :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl was added to - negotiate data formats as with - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, but without the overhead of - programming the hardware and regardless of I/O in progress. - - In struct :c:type:`v4l2_format` the ``fmt`` union was - extended to contain struct :c:type:`v4l2_window`. All - image format negotiations are now possible with ``VIDIOC_G_FMT``, - ``VIDIOC_S_FMT`` and ``VIDIOC_TRY_FMT``; ioctl. The ``VIDIOC_G_WIN`` - and ``VIDIOC_S_WIN`` ioctls to prepare for a video overlay were - removed. The ``type`` field changed to type enum - :c:type:`v4l2_buf_type` and the buffer type names - changed as follows. - - - - .. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - Old defines - - enum :c:type:`v4l2_buf_type` - * - ``V4L2_BUF_TYPE_CAPTURE`` - - ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` - * - ``V4L2_BUF_TYPE_CODECIN`` - - Omitted for now - * - ``V4L2_BUF_TYPE_CODECOUT`` - - Omitted for now - * - ``V4L2_BUF_TYPE_EFFECTSIN`` - - Omitted for now - * - ``V4L2_BUF_TYPE_EFFECTSIN2`` - - Omitted for now - * - ``V4L2_BUF_TYPE_EFFECTSOUT`` - - Omitted for now - * - ``V4L2_BUF_TYPE_VIDEOOUT`` - - ``V4L2_BUF_TYPE_VIDEO_OUTPUT`` - * - ``-`` - - ``V4L2_BUF_TYPE_VIDEO_OVERLAY`` - * - ``-`` - - ``V4L2_BUF_TYPE_VBI_CAPTURE`` - * - ``-`` - - ``V4L2_BUF_TYPE_VBI_OUTPUT`` - * - ``-`` - - ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` - * - ``-`` - - ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT`` - * - ``V4L2_BUF_TYPE_PRIVATE_BASE`` - - ``V4L2_BUF_TYPE_PRIVATE`` (but this is deprecated) - - -10. In struct :c:type:`v4l2_fmtdesc` a enum - :c:type:`v4l2_buf_type` field named ``type`` was - added as in struct :c:type:`v4l2_format`. The - ``VIDIOC_ENUM_FBUFFMT`` ioctl is no longer needed and was removed. - These calls can be replaced by - :ref:`VIDIOC_ENUM_FMT` with type - ``V4L2_BUF_TYPE_VIDEO_OVERLAY``. - -11. In struct :c:type:`v4l2_pix_format` the ``depth`` - field was removed, assuming applications which recognize the format - by its four-character-code already know the color depth, and others - do not care about it. The same rationale lead to the removal of the - ``V4L2_FMT_FLAG_COMPRESSED`` flag. The - ``V4L2_FMT_FLAG_SWCONVECOMPRESSED`` flag was removed because drivers - are not supposed to convert images in kernel space. A user library - of conversion functions should be provided instead. The - ``V4L2_FMT_FLAG_BYTESPERLINE`` flag was redundant. Applications can - set the ``bytesperline`` field to zero to get a reasonable default. - Since the remaining flags were replaced as well, the ``flags`` field - itself was removed. - - The interlace flags were replaced by a enum - :c:type:`v4l2_field` value in a newly added ``field`` - field. - - - - .. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - Old flag - - enum :c:type:`v4l2_field` - * - ``V4L2_FMT_FLAG_NOT_INTERLACED`` - - ? - * - ``V4L2_FMT_FLAG_INTERLACED`` = ``V4L2_FMT_FLAG_COMBINED`` - - ``V4L2_FIELD_INTERLACED`` - * - ``V4L2_FMT_FLAG_TOPFIELD`` = ``V4L2_FMT_FLAG_ODDFIELD`` - - ``V4L2_FIELD_TOP`` - * - ``V4L2_FMT_FLAG_BOTFIELD`` = ``V4L2_FMT_FLAG_EVENFIELD`` - - ``V4L2_FIELD_BOTTOM`` - * - ``-`` - - ``V4L2_FIELD_SEQ_TB`` - * - ``-`` - - ``V4L2_FIELD_SEQ_BT`` - * - ``-`` - - ``V4L2_FIELD_ALTERNATE`` - - - The color space flags were replaced by a enum - :c:type:`v4l2_colorspace` value in a newly added - ``colorspace`` field, where one of ``V4L2_COLORSPACE_SMPTE170M``, - ``V4L2_COLORSPACE_BT878``, ``V4L2_COLORSPACE_470_SYSTEM_M`` or - ``V4L2_COLORSPACE_470_SYSTEM_BG`` replaces ``V4L2_FMT_CS_601YUV``. - -12. In struct :c:type:`v4l2_requestbuffers` the - ``type`` field was properly defined as enum - :c:type:`v4l2_buf_type`. Buffer types changed as - mentioned above. A new ``memory`` field of type enum - :c:type:`v4l2_memory` was added to distinguish between - I/O methods using buffers allocated by the driver or the - application. See :ref:`io` for details. - -13. In struct :c:type:`v4l2_buffer` the ``type`` field was - properly defined as enum :c:type:`v4l2_buf_type`. - Buffer types changed as mentioned above. A ``field`` field of type - enum :c:type:`v4l2_field` was added to indicate if a - buffer contains a top or bottom field. The old field flags were - removed. Since no unadjusted system time clock was added to the - kernel as planned, the ``timestamp`` field changed back from type - stamp_t, an unsigned 64 bit integer expressing the sample time in - nanoseconds, to struct :c:type:`timeval`. With the addition - of a second memory mapping method the ``offset`` field moved into - union ``m``, and a new ``memory`` field of type enum - :c:type:`v4l2_memory` was added to distinguish between - I/O methods. See :ref:`io` for details. - - The ``V4L2_BUF_REQ_CONTIG`` flag was used by the V4L compatibility - layer, after changes to this code it was no longer needed. The - ``V4L2_BUF_ATTR_DEVICEMEM`` flag would indicate if the buffer was - indeed allocated in device memory rather than DMA-able system - memory. It was barely useful and so was removed. - -14. In struct :c:type:`v4l2_framebuffer` the - ``base[3]`` array anticipating double- and triple-buffering in - off-screen video memory, however without defining a synchronization - mechanism, was replaced by a single pointer. The - ``V4L2_FBUF_CAP_SCALEUP`` and ``V4L2_FBUF_CAP_SCALEDOWN`` flags were - removed. Applications can determine this capability more accurately - using the new cropping and scaling interface. The - ``V4L2_FBUF_CAP_CLIPPING`` flag was replaced by - ``V4L2_FBUF_CAP_LIST_CLIPPING`` and - ``V4L2_FBUF_CAP_BITMAP_CLIPPING``. - -15. In struct :c:type:`v4l2_clip` the ``x``, ``y``, - ``width`` and ``height`` field moved into a ``c`` substructure of - type struct :c:type:`v4l2_rect`. The ``x`` and ``y`` - fields were renamed to ``left`` and ``top``, i. e. offsets to a - context dependent origin. - -16. In struct :c:type:`v4l2_window` the ``x``, ``y``, - ``width`` and ``height`` field moved into a ``w`` substructure as - above. A ``field`` field of type :c:type:`v4l2_field` was added to - distinguish between field and frame (interlaced) overlay. - -17. The digital zoom interface, including struct - struct ``v4l2_zoomcap``, struct - struct ``v4l2_zoom``, ``V4L2_ZOOM_NONCAP`` and - ``V4L2_ZOOM_WHILESTREAMING`` was replaced by a new cropping and - scaling interface. The previously unused struct - struct :c:type:`v4l2_cropcap` and struct :c:type:`v4l2_crop` - where redefined for this purpose. See :ref:`crop` for details. - -18. In struct :c:type:`v4l2_vbi_format` the - ``SAMPLE_FORMAT`` field now contains a four-character-code as used - to identify video image formats and ``V4L2_PIX_FMT_GREY`` replaces - the ``V4L2_VBI_SF_UBYTE`` define. The ``reserved`` field was - extended. - -19. In struct :c:type:`v4l2_captureparm` the type of - the ``timeperframe`` field changed from unsigned long to struct - :c:type:`v4l2_fract`. This allows the accurate - expression of multiples of the NTSC-M frame rate 30000 / 1001. A new - field ``readbuffers`` was added to control the driver behaviour in - read I/O mode. - - Similar changes were made to struct - :c:type:`v4l2_outputparm`. - -20. The struct ``v4l2_performance`` and - ``VIDIOC_G_PERF`` ioctl were dropped. Except when using the - :ref:`read/write I/O method <rw>`, which is limited anyway, this - information is already available to applications. - -21. The example transformation from RGB to YCbCr color space in the old - V4L2 documentation was inaccurate, this has been corrected in - :ref:`pixfmt`. - - -V4L2 2003-06-19 -=============== - -1. A new capability flag ``V4L2_CAP_RADIO`` was added for radio devices. - Prior to this change radio devices would identify solely by having - exactly one tuner whose type field reads ``V4L2_TUNER_RADIO``. - -2. An optional driver access priority mechanism was added, see - :ref:`app-pri` for details. - -3. The audio input and output interface was found to be incomplete. - - Previously the :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` ioctl would - enumerate the available audio inputs. An ioctl to determine the - current audio input, if more than one combines with the current video - input, did not exist. So ``VIDIOC_G_AUDIO`` was renamed to - ``VIDIOC_G_AUDIO_OLD``, this ioctl was removed on Kernel 2.6.39. The - :ref:`VIDIOC_ENUMAUDIO` ioctl was added to - enumerate audio inputs, while - :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` now reports the current - audio input. - - The same changes were made to - :ref:`VIDIOC_G_AUDOUT <VIDIOC_G_AUDOUT>` and - :ref:`VIDIOC_ENUMAUDOUT <VIDIOC_ENUMAUDOUT>`. - - Until further the "videodev" module will automatically translate - between the old and new ioctls, but drivers and applications must be - updated to successfully compile again. - -4. The :ref:`VIDIOC_OVERLAY` ioctl was incorrectly - defined with write-read parameter. It was changed to write-only, - while the write-read version was renamed to ``VIDIOC_OVERLAY_OLD``. - The old ioctl was removed on Kernel 2.6.39. Until further the - "videodev" kernel module will automatically translate to the new - version, so drivers must be recompiled, but not applications. - -5. :ref:`overlay` incorrectly stated that clipping rectangles define - regions where the video can be seen. Correct is that clipping - rectangles define regions where *no* video shall be displayed and so - the graphics surface can be seen. - -6. The :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` and - :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctls were defined with - write-only parameter, inconsistent with other ioctls modifying their - argument. They were changed to write-read, while a ``_OLD`` suffix - was added to the write-only versions. The old ioctls were removed on - Kernel 2.6.39. Drivers and applications assuming a constant parameter - need an update. - - -V4L2 2003-11-05 -=============== - -1. In :ref:`pixfmt-rgb` the following pixel formats were incorrectly - transferred from Bill Dirks' V4L2 specification. Descriptions below - refer to bytes in memory, in ascending address order. - - - - .. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - Symbol - - In this document prior to revision 0.5 - - Corrected - * - ``V4L2_PIX_FMT_RGB24`` - - B, G, R - - R, G, B - * - ``V4L2_PIX_FMT_BGR24`` - - R, G, B - - B, G, R - * - ``V4L2_PIX_FMT_RGB32`` - - B, G, R, X - - R, G, B, X - * - ``V4L2_PIX_FMT_BGR32`` - - R, G, B, X - - B, G, R, X - - - The ``V4L2_PIX_FMT_BGR24`` example was always correct. - - In :ref:`v4l-image-properties` the mapping of the V4L - ``VIDEO_PALETTE_RGB24`` and ``VIDEO_PALETTE_RGB32`` formats to V4L2 - pixel formats was accordingly corrected. - -2. Unrelated to the fixes above, drivers may still interpret some V4L2 - RGB pixel formats differently. These issues have yet to be addressed, - for details see :ref:`pixfmt-rgb`. - - -V4L2 in Linux 2.6.6, 2004-05-09 -=============================== - -1. The :ref:`VIDIOC_CROPCAP` ioctl was incorrectly - defined with read-only parameter. It is now defined as write-read - ioctl, while the read-only version was renamed to - ``VIDIOC_CROPCAP_OLD``. The old ioctl was removed on Kernel 2.6.39. - - -V4L2 in Linux 2.6.8 -=================== - -1. A new field ``input`` (former ``reserved[0]``) was added to the - struct :c:type:`v4l2_buffer` structure. Purpose of this - field is to alternate between video inputs (e. g. cameras) in step - with the video capturing process. This function must be enabled with - the new ``V4L2_BUF_FLAG_INPUT`` flag. The ``flags`` field is no - longer read-only. - - -V4L2 spec erratum 2004-08-01 -============================ - -1. The return value of the :ref:`func-open` function was incorrectly - documented. - -2. Audio output ioctls end in -AUDOUT, not -AUDIOOUT. - -3. In the Current Audio Input example the ``VIDIOC_G_AUDIO`` ioctl took - the wrong argument. - -4. The documentation of the :ref:`VIDIOC_QBUF` and - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctls did not mention the - struct :c:type:`v4l2_buffer` ``memory`` field. It was - also missing from examples. Also on the ``VIDIOC_DQBUF`` page the ``EIO`` - error code was not documented. - - -V4L2 in Linux 2.6.14 -==================== - -1. A new sliced VBI interface was added. It is documented in - :ref:`sliced` and replaces the interface first proposed in V4L2 - specification 0.8. - - -V4L2 in Linux 2.6.15 -==================== - -1. The :ref:`VIDIOC_LOG_STATUS` ioctl was added. - -2. New video standards ``V4L2_STD_NTSC_443``, ``V4L2_STD_SECAM_LC``, - ``V4L2_STD_SECAM_DK`` (a set of SECAM D, K and K1), and - ``V4L2_STD_ATSC`` (a set of ``V4L2_STD_ATSC_8_VSB`` and - ``V4L2_STD_ATSC_16_VSB``) were defined. Note the ``V4L2_STD_525_60`` - set now includes ``V4L2_STD_NTSC_443``. See also - :ref:`v4l2-std-id`. - -3. The ``VIDIOC_G_COMP`` and ``VIDIOC_S_COMP`` ioctl were renamed to - ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` respectively. Their - argument was replaced by a struct - ``v4l2_mpeg_compression`` pointer. (The - ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls where removed - in Linux 2.6.25.) - - -V4L2 spec erratum 2005-11-27 -============================ - -The capture example in :ref:`capture-example` called the -:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` ioctl without checking if -cropping is supported. In the video standard selection example in -:ref:`standard` the :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` call used -the wrong argument type. - - -V4L2 spec erratum 2006-01-10 -============================ - -1. The ``V4L2_IN_ST_COLOR_KILL`` flag in struct - :c:type:`v4l2_input` not only indicates if the color - killer is enabled, but also if it is active. (The color killer - disables color decoding when it detects no color in the video signal - to improve the image quality.) - -2. :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` is a write-read ioctl, not - write-only as stated on its reference page. The ioctl changed in 2003 - as noted above. - - -V4L2 spec erratum 2006-02-03 -============================ - -1. In struct :c:type:`v4l2_captureparm` and struct - :c:type:`v4l2_outputparm` the ``timeperframe`` - field gives the time in seconds, not microseconds. - - -V4L2 spec erratum 2006-02-04 -============================ - -1. The ``clips`` field in struct :c:type:`v4l2_window` - must point to an array of struct :c:type:`v4l2_clip`, not - a linked list, because drivers ignore the struct - struct :c:type:`v4l2_clip`. ``next`` pointer. - - -V4L2 in Linux 2.6.17 -==================== - -1. New video standard macros were added: ``V4L2_STD_NTSC_M_KR`` (NTSC M - South Korea), and the sets ``V4L2_STD_MN``, ``V4L2_STD_B``, - ``V4L2_STD_GH`` and ``V4L2_STD_DK``. The ``V4L2_STD_NTSC`` and - ``V4L2_STD_SECAM`` sets now include ``V4L2_STD_NTSC_M_KR`` and - ``V4L2_STD_SECAM_LC`` respectively. - -2. A new ``V4L2_TUNER_MODE_LANG1_LANG2`` was defined to record both - languages of a bilingual program. The use of - ``V4L2_TUNER_MODE_STEREO`` for this purpose is deprecated now. See - the :ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` section for details. - - -V4L2 spec erratum 2006-09-23 (Draft 0.15) -========================================= - -1. In various places ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` and - ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT`` of the sliced VBI interface were - not mentioned along with other buffer types. - -2. In :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` it was clarified that the struct - :c:type:`v4l2_audio` ``mode`` field is a flags field. - -3. :ref:`VIDIOC_QUERYCAP` did not mention the sliced VBI and radio - capability flags. - -4. In :ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` it was clarified that applications - must initialize the tuner ``type`` field of struct - :c:type:`v4l2_frequency` before calling - :ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>`. - -5. The ``reserved`` array in struct - :c:type:`v4l2_requestbuffers` has 2 elements, - not 32. - -6. In :ref:`output` and :ref:`raw-vbi` the device file names - ``/dev/vout`` which never caught on were replaced by ``/dev/video``. - -7. With Linux 2.6.15 the possible range for VBI device minor numbers was - extended from 224-239 to 224-255. Accordingly device file names - ``/dev/vbi0`` to ``/dev/vbi31`` are possible now. - - -V4L2 in Linux 2.6.18 -==================== - -1. New ioctls :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, - :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and - :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` were added, a - flag to skip unsupported controls with - :ref:`VIDIOC_QUERYCTRL`, new control types - ``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_TYPE_CTRL_CLASS`` - (:c:type:`v4l2_ctrl_type`), and new control flags - ``V4L2_CTRL_FLAG_READ_ONLY``, ``V4L2_CTRL_FLAG_UPDATE``, - ``V4L2_CTRL_FLAG_INACTIVE`` and ``V4L2_CTRL_FLAG_SLIDER`` - (:ref:`control-flags`). See :ref:`extended-controls` for details. - - -V4L2 in Linux 2.6.19 -==================== - -1. In struct :c:type:`v4l2_sliced_vbi_cap` a - buffer type field was added replacing a reserved field. Note on - architectures where the size of enum types differs from int types the - size of the structure changed. The - :ref:`VIDIOC_G_SLICED_VBI_CAP <VIDIOC_G_SLICED_VBI_CAP>` ioctl - was redefined from being read-only to write-read. Applications must - initialize the type field and clear the reserved fields now. These - changes may *break the compatibility* with older drivers and - applications. - -2. The ioctls :ref:`VIDIOC_ENUM_FRAMESIZES` - and - :ref:`VIDIOC_ENUM_FRAMEINTERVALS` - were added. - -3. A new pixel format ``V4L2_PIX_FMT_RGB444`` (:ref:`pixfmt-rgb`) was - added. - - -V4L2 spec erratum 2006-10-12 (Draft 0.17) -========================================= - -1. ``V4L2_PIX_FMT_HM12`` (:ref:`reserved-formats`) is a YUV 4:2:0, not - 4:2:2 format. - - -V4L2 in Linux 2.6.21 -==================== - -1. The ``videodev2.h`` header file is now dual licensed under GNU - General Public License version two or later, and under a 3-clause - BSD-style license. - - -V4L2 in Linux 2.6.22 -==================== - -1. Two new field orders ``V4L2_FIELD_INTERLACED_TB`` and - ``V4L2_FIELD_INTERLACED_BT`` were added. See :c:type:`v4l2_field` for - details. - -2. Three new clipping/blending methods with a global or straight or - inverted local alpha value were added to the video overlay interface. - See the description of the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` - and :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctls for details. - - A new ``global_alpha`` field was added to - :c:type:`v4l2_window`, extending the structure. This - may *break compatibility* with applications using a struct - struct :c:type:`v4l2_window` directly. However the - :ref:`VIDIOC_G/S/TRY_FMT <VIDIOC_G_FMT>` ioctls, which take a - pointer to a :c:type:`v4l2_format` parent structure - with padding bytes at the end, are not affected. - -3. The format of the ``chromakey`` field in struct - :c:type:`v4l2_window` changed from "host order RGB32" - to a pixel value in the same format as the framebuffer. This may - *break compatibility* with existing applications. Drivers supporting - the "host order RGB32" format are not known. - - -V4L2 in Linux 2.6.24 -==================== - -1. The pixel formats ``V4L2_PIX_FMT_PAL8``, ``V4L2_PIX_FMT_YUV444``, - ``V4L2_PIX_FMT_YUV555``, ``V4L2_PIX_FMT_YUV565`` and - ``V4L2_PIX_FMT_YUV32`` were added. - - -V4L2 in Linux 2.6.25 -==================== - -1. The pixel formats :ref:`V4L2_PIX_FMT_Y16 <V4L2-PIX-FMT-Y16>` and - :ref:`V4L2_PIX_FMT_SBGGR16 <V4L2-PIX-FMT-SBGGR16>` were added. - -2. New :ref:`controls <control>` ``V4L2_CID_POWER_LINE_FREQUENCY``, - ``V4L2_CID_HUE_AUTO``, ``V4L2_CID_WHITE_BALANCE_TEMPERATURE``, - ``V4L2_CID_SHARPNESS`` and ``V4L2_CID_BACKLIGHT_COMPENSATION`` were - added. The controls ``V4L2_CID_BLACK_LEVEL``, ``V4L2_CID_WHITENESS``, - ``V4L2_CID_HCENTER`` and ``V4L2_CID_VCENTER`` were deprecated. - -3. A :ref:`Camera controls class <camera-controls>` was added, with - the new controls ``V4L2_CID_EXPOSURE_AUTO``, - ``V4L2_CID_EXPOSURE_ABSOLUTE``, ``V4L2_CID_EXPOSURE_AUTO_PRIORITY``, - ``V4L2_CID_PAN_RELATIVE``, ``V4L2_CID_TILT_RELATIVE``, - ``V4L2_CID_PAN_RESET``, ``V4L2_CID_TILT_RESET``, - ``V4L2_CID_PAN_ABSOLUTE``, ``V4L2_CID_TILT_ABSOLUTE``, - ``V4L2_CID_FOCUS_ABSOLUTE``, ``V4L2_CID_FOCUS_RELATIVE`` and - ``V4L2_CID_FOCUS_AUTO``. - -4. The ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls, which - were superseded by the :ref:`extended controls <extended-controls>` - interface in Linux 2.6.18, where finally removed from the - ``videodev2.h`` header file. - - -V4L2 in Linux 2.6.26 -==================== - -1. The pixel formats ``V4L2_PIX_FMT_Y16`` and ``V4L2_PIX_FMT_SBGGR16`` - were added. - -2. Added user controls ``V4L2_CID_CHROMA_AGC`` and - ``V4L2_CID_COLOR_KILLER``. - - -V4L2 in Linux 2.6.27 -==================== - -1. The :ref:`VIDIOC_S_HW_FREQ_SEEK` ioctl - and the ``V4L2_CAP_HW_FREQ_SEEK`` capability were added. - -2. The pixel formats ``V4L2_PIX_FMT_YVYU``, ``V4L2_PIX_FMT_PCA501``, - ``V4L2_PIX_FMT_PCA505``, ``V4L2_PIX_FMT_PCA508``, - ``V4L2_PIX_FMT_PCA561``, ``V4L2_PIX_FMT_SGBRG8``, - ``V4L2_PIX_FMT_PAC207`` and ``V4L2_PIX_FMT_PJPG`` were added. - - -V4L2 in Linux 2.6.28 -==================== - -1. Added ``V4L2_MPEG_AUDIO_ENCODING_AAC`` and - ``V4L2_MPEG_AUDIO_ENCODING_AC3`` MPEG audio encodings. - -2. Added ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC`` MPEG video encoding. - -3. The pixel formats ``V4L2_PIX_FMT_SGRBG10`` and - ``V4L2_PIX_FMT_SGRBG10DPCM8`` were added. - - -V4L2 in Linux 2.6.29 -==================== - -1. The ``VIDIOC_G_CHIP_IDENT`` ioctl was renamed to - ``VIDIOC_G_CHIP_IDENT_OLD`` and ``VIDIOC_DBG_G_CHIP_IDENT`` was - introduced in its place. The old struct - struct ``v4l2_chip_ident`` was renamed to - struct ``v4l2_chip_ident_old``. - -2. The pixel formats ``V4L2_PIX_FMT_VYUY``, ``V4L2_PIX_FMT_NV16`` and - ``V4L2_PIX_FMT_NV61`` were added. - -3. Added camera controls ``V4L2_CID_ZOOM_ABSOLUTE``, - ``V4L2_CID_ZOOM_RELATIVE``, ``V4L2_CID_ZOOM_CONTINUOUS`` and - ``V4L2_CID_PRIVACY``. - - -V4L2 in Linux 2.6.30 -==================== - -1. New control flag ``V4L2_CTRL_FLAG_WRITE_ONLY`` was added. - -2. New control ``V4L2_CID_COLORFX`` was added. - - -V4L2 in Linux 2.6.32 -==================== - -1. In order to be easier to compare a V4L2 API and a kernel version, now - V4L2 API is numbered using the Linux Kernel version numeration. - -2. Finalized the RDS capture API. See :ref:`rds` for more information. - -3. Added new capabilities for modulators and RDS encoders. - -4. Add description for libv4l API. - -5. Added support for string controls via new type - ``V4L2_CTRL_TYPE_STRING``. - -6. Added ``V4L2_CID_BAND_STOP_FILTER`` documentation. - -7. Added FM Modulator (FM TX) Extended Control Class: - ``V4L2_CTRL_CLASS_FM_TX`` and their Control IDs. - -8. Added FM Receiver (FM RX) Extended Control Class: - ``V4L2_CTRL_CLASS_FM_RX`` and their Control IDs. - -9. Added Remote Controller chapter, describing the default Remote - Controller mapping for media devices. - - -V4L2 in Linux 2.6.33 -==================== - -1. Added support for Digital Video timings in order to support HDTV - receivers and transmitters. - - -V4L2 in Linux 2.6.34 -==================== - -1. Added ``V4L2_CID_IRIS_ABSOLUTE`` and ``V4L2_CID_IRIS_RELATIVE`` - controls to the :ref:`Camera controls class <camera-controls>`. - - -V4L2 in Linux 2.6.37 -==================== - -1. Remove the vtx (videotext/teletext) API. This API was no longer used - and no hardware exists to verify the API. Nor were any userspace - applications found that used it. It was originally scheduled for - removal in 2.6.35. - - -V4L2 in Linux 2.6.39 -==================== - -1. The old VIDIOC_*_OLD symbols and V4L1 support were removed. - -2. Multi-planar API added. Does not affect the compatibility of current - drivers and applications. See :ref:`multi-planar API <planar-apis>` - for details. - - -V4L2 in Linux 3.1 -================= - -1. VIDIOC_QUERYCAP now returns a per-subsystem version instead of a - per-driver one. - - Standardize an error code for invalid ioctl. - - Added V4L2_CTRL_TYPE_BITMASK. - - -V4L2 in Linux 3.2 -================= - -1. V4L2_CTRL_FLAG_VOLATILE was added to signal volatile controls to - userspace. - -2. Add selection API for extended control over cropping and composing. - Does not affect the compatibility of current drivers and - applications. See :ref:`selection API <selection-api>` for details. - - -V4L2 in Linux 3.3 -================= - -1. Added ``V4L2_CID_ALPHA_COMPONENT`` control to the - :ref:`User controls class <control>`. - -2. Added the device_caps field to struct v4l2_capabilities and added - the new V4L2_CAP_DEVICE_CAPS capability. - - -V4L2 in Linux 3.4 -================= - -1. Added :ref:`JPEG compression control class <jpeg-controls>`. - -2. Extended the DV Timings API: - :ref:`VIDIOC_ENUM_DV_TIMINGS`, - :ref:`VIDIOC_QUERY_DV_TIMINGS` and - :ref:`VIDIOC_DV_TIMINGS_CAP`. - - -V4L2 in Linux 3.5 -================= - -1. Added integer menus, the new type will be - V4L2_CTRL_TYPE_INTEGER_MENU. - -2. Added selection API for V4L2 subdev interface: - :ref:`VIDIOC_SUBDEV_G_SELECTION` and - :ref:`VIDIOC_SUBDEV_S_SELECTION <VIDIOC_SUBDEV_G_SELECTION>`. - -3. Added ``V4L2_COLORFX_ANTIQUE``, ``V4L2_COLORFX_ART_FREEZE``, - ``V4L2_COLORFX_AQUA``, ``V4L2_COLORFX_SILHOUETTE``, - ``V4L2_COLORFX_SOLARIZATION``, ``V4L2_COLORFX_VIVID`` and - ``V4L2_COLORFX_ARBITRARY_CBCR`` menu items to the - ``V4L2_CID_COLORFX`` control. - -4. Added ``V4L2_CID_COLORFX_CBCR`` control. - -5. Added camera controls ``V4L2_CID_AUTO_EXPOSURE_BIAS``, - ``V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE``, - ``V4L2_CID_IMAGE_STABILIZATION``, ``V4L2_CID_ISO_SENSITIVITY``, - ``V4L2_CID_ISO_SENSITIVITY_AUTO``, ``V4L2_CID_EXPOSURE_METERING``, - ``V4L2_CID_SCENE_MODE``, ``V4L2_CID_3A_LOCK``, - ``V4L2_CID_AUTO_FOCUS_START``, ``V4L2_CID_AUTO_FOCUS_STOP``, - ``V4L2_CID_AUTO_FOCUS_STATUS`` and ``V4L2_CID_AUTO_FOCUS_RANGE``. - - -V4L2 in Linux 3.6 -================= - -1. Replaced ``input`` in struct :c:type:`v4l2_buffer` by - ``reserved2`` and removed ``V4L2_BUF_FLAG_INPUT``. - -2. Added V4L2_CAP_VIDEO_M2M and V4L2_CAP_VIDEO_M2M_MPLANE - capabilities. - -3. Added support for frequency band enumerations: - :ref:`VIDIOC_ENUM_FREQ_BANDS`. - - -V4L2 in Linux 3.9 -================= - -1. Added timestamp types to ``flags`` field in - struct :c:type:`v4l2_buffer`. See :ref:`buffer-flags`. - -2. Added ``V4L2_EVENT_CTRL_CH_RANGE`` control event changes flag. See - :ref:`ctrl-changes-flags`. - - -V4L2 in Linux 3.10 -================== - -1. Removed obsolete and unused DV_PRESET ioctls VIDIOC_G_DV_PRESET, - VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and - VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output - capability flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS. - -2. Added new debugging ioctl - :ref:`VIDIOC_DBG_G_CHIP_INFO`. - - -V4L2 in Linux 3.11 -================== - -1. Remove obsolete ``VIDIOC_DBG_G_CHIP_IDENT`` ioctl. - - -V4L2 in Linux 3.14 -================== - -1. In struct :c:type:`v4l2_rect`, the type of ``width`` and - ``height`` fields changed from _s32 to _u32. - - -V4L2 in Linux 3.15 -================== - -1. Added Software Defined Radio (SDR) Interface. - - -V4L2 in Linux 3.16 -================== - -1. Added event V4L2_EVENT_SOURCE_CHANGE. - - -V4L2 in Linux 3.17 -================== - -1. Extended struct :c:type:`v4l2_pix_format`. Added - format flags. - -2. Added compound control types and - :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>`. - - -V4L2 in Linux 3.18 -================== - -1. Added ``V4L2_CID_PAN_SPEED`` and ``V4L2_CID_TILT_SPEED`` camera - controls. - - -V4L2 in Linux 3.19 -================== - -1. Rewrote Colorspace chapter, added new enum - :c:type:`v4l2_ycbcr_encoding` and enum - :c:type:`v4l2_quantization` fields to struct - :c:type:`v4l2_pix_format`, struct - :c:type:`v4l2_pix_format_mplane` and - struct :c:type:`v4l2_mbus_framefmt`. - - -V4L2 in Linux 4.4 -================= - -1. Renamed ``V4L2_TUNER_ADC`` to ``V4L2_TUNER_SDR``. The use of - ``V4L2_TUNER_ADC`` is deprecated now. - -2. Added ``V4L2_CID_RF_TUNER_RF_GAIN`` RF Tuner control. - -3. Added transmitter support for Software Defined Radio (SDR) Interface. - - -.. _other: - -Relation of V4L2 to other Linux multimedia APIs -=============================================== - - -.. _xvideo: - -X Video Extension ------------------ - -The X Video Extension (abbreviated XVideo or just Xv) is an extension of -the X Window system, implemented for example by the XFree86 project. Its -scope is similar to V4L2, an API to video capture and output devices for -X clients. Xv allows applications to display live video in a window, -send window contents to a TV output, and capture or output still images -in XPixmaps [#f1]_. With their implementation XFree86 makes the extension -available across many operating systems and architectures. - -Because the driver is embedded into the X server Xv has a number of -advantages over the V4L2 :ref:`video overlay interface <overlay>`. The -driver can easily determine the overlay target, i. e. visible graphics -memory or off-screen buffers for a destructive overlay. It can program -the RAMDAC for a non-destructive overlay, scaling or color-keying, or -the clipping functions of the video capture hardware, always in sync -with drawing operations or windows moving or changing their stacking -order. - -To combine the advantages of Xv and V4L a special Xv driver exists in -XFree86 and XOrg, just programming any overlay capable Video4Linux -device it finds. To enable it ``/etc/X11/XF86Config`` must contain these -lines: - -:: - - Section "Module" - Load "v4l" - EndSection - -As of XFree86 4.2 this driver still supports only V4L ioctls, however it -should work just fine with all V4L2 devices through the V4L2 -backward-compatibility layer. Since V4L2 permits multiple opens it is -possible (if supported by the V4L2 driver) to capture video while an X -client requested video overlay. Restrictions of simultaneous capturing -and overlay are discussed in :ref:`overlay` apply. - -Only marginally related to V4L2, XFree86 extended Xv to support hardware -YUV to RGB conversion and scaling for faster video playback, and added -an interface to MPEG-2 decoding hardware. This API is useful to display -images captured with V4L2 devices. - - -Digital Video -------------- - -V4L2 does not support digital terrestrial, cable or satellite broadcast. -A separate project aiming at digital receivers exists. You can find its -homepage at `https://linuxtv.org <https://linuxtv.org>`__. The Linux -DVB API has no connection to the V4L2 API except that drivers for hybrid -hardware may support both. - - -Audio Interfaces ----------------- - -[to do - OSS/ALSA] - - -.. _experimental: - -Experimental API Elements -========================= - -The following V4L2 API elements are currently experimental and may -change in the future. - -- :ref:`VIDIOC_DBG_G_REGISTER` and - :ref:`VIDIOC_DBG_S_REGISTER <VIDIOC_DBG_G_REGISTER>` ioctls. - -- :ref:`VIDIOC_DBG_G_CHIP_INFO` ioctl. - - -.. _obsolete: - -Obsolete API Elements -===================== - -The following V4L2 API elements were superseded by new interfaces and -should not be implemented in new drivers. - -- ``VIDIOC_G_MPEGCOMP`` and ``VIDIOC_S_MPEGCOMP`` ioctls. Use Extended - Controls, :ref:`extended-controls`. - -- VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET, - VIDIOC_ENUM_DV_PRESETS and VIDIOC_QUERY_DV_PRESET ioctls. Use - the DV Timings API (:ref:`dv-timings`). - -- ``VIDIOC_SUBDEV_G_CROP`` and ``VIDIOC_SUBDEV_S_CROP`` ioctls. Use - ``VIDIOC_SUBDEV_G_SELECTION`` and ``VIDIOC_SUBDEV_S_SELECTION``, - :ref:`VIDIOC_SUBDEV_G_SELECTION`. - -.. [#f1] - This is not implemented in XFree86. diff --git a/Documentation/media/uapi/v4l/hsv-formats.rst b/Documentation/media/uapi/v4l/hsv-formats.rst deleted file mode 100644 index f52f8ba131f0..000000000000 --- a/Documentation/media/uapi/v4l/hsv-formats.rst +++ /dev/null @@ -1,26 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _hsv-formats: - -*********** -HSV Formats -*********** - -These formats store the color information of the image -in a geometrical representation. The colors are mapped into a -cylinder, where the angle is the HUE, the height is the VALUE -and the distance to the center is the SATURATION. This is a very -useful format for image segmentation algorithms. - - -.. toctree:: - :maxdepth: 1 - - pixfmt-packed-hsv diff --git a/Documentation/media/uapi/v4l/io.rst b/Documentation/media/uapi/v4l/io.rst deleted file mode 100644 index 049a2530d3a2..000000000000 --- a/Documentation/media/uapi/v4l/io.rst +++ /dev/null @@ -1,58 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _io: - -############ -Input/Output -############ -The V4L2 API defines several different methods to read from or write to -a device. All drivers exchanging data with applications must support at -least one of them. - -The classic I/O method using the :ref:`read() <func-read>` and -:ref:`write() <func-write>` function is automatically selected after opening a -V4L2 device. When the driver does not support this method attempts to -read or write will fail at any time. - -Other methods must be negotiated. To select the streaming I/O method -with memory mapped or user buffers applications call the -:ref:`VIDIOC_REQBUFS` ioctl. The asynchronous I/O -method is not defined yet. - -Video overlay can be considered another I/O method, although the -application does not directly receive the image data. It is selected by -initiating video overlay with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -ioctl. For more information see :ref:`overlay`. - -Generally exactly one I/O method, including overlay, is associated with -each file descriptor. The only exceptions are applications not -exchanging data with a driver ("panel applications", see :ref:`open`) -and drivers permitting simultaneous video capturing and overlay using -the same file descriptor, for compatibility with V4L and earlier -versions of V4L2. - -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_REQBUFS` would permit this to some -degree, but for simplicity drivers need not support switching the I/O -method (after first switching away from read/write) other than by -closing and reopening the device. - -The following sections describe the various I/O methods in more detail. - - -.. toctree:: - :maxdepth: 1 - - rw - mmap - userp - dmabuf - async - buffer - field-order diff --git a/Documentation/media/uapi/v4l/libv4l-introduction.rst b/Documentation/media/uapi/v4l/libv4l-introduction.rst deleted file mode 100644 index 1b206d380d4b..000000000000 --- a/Documentation/media/uapi/v4l/libv4l-introduction.rst +++ /dev/null @@ -1,191 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _libv4l-introduction: - -************ -Introduction -************ - -libv4l is a collection of libraries which adds a thin abstraction layer -on top of video4linux2 devices. The purpose of this (thin) layer is to -make it easy for application writers to support a wide variety of -devices without having to write separate code for different devices in -the same class. - -An example of using libv4l is provided by -:ref:`v4l2grab <v4l2grab-example>`. - -libv4l consists of 3 different libraries: - - -libv4lconvert -============= - -libv4lconvert is a library that converts several different pixelformats -found in V4L2 drivers into a few common RGB and YUY formats. - -It currently accepts the following V4L2 driver formats: -:ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR24>`, -:ref:`V4L2_PIX_FMT_HM12 <V4L2-PIX-FMT-HM12>`, -:ref:`V4L2_PIX_FMT_JPEG <V4L2-PIX-FMT-JPEG>`, -:ref:`V4L2_PIX_FMT_MJPEG <V4L2-PIX-FMT-MJPEG>`, -:ref:`V4L2_PIX_FMT_MR97310A <V4L2-PIX-FMT-MR97310A>`, -:ref:`V4L2_PIX_FMT_OV511 <V4L2-PIX-FMT-OV511>`, -:ref:`V4L2_PIX_FMT_OV518 <V4L2-PIX-FMT-OV518>`, -:ref:`V4L2_PIX_FMT_PAC207 <V4L2-PIX-FMT-PAC207>`, -:ref:`V4L2_PIX_FMT_PJPG <V4L2-PIX-FMT-PJPG>`, -:ref:`V4L2_PIX_FMT_RGB24 <V4L2-PIX-FMT-RGB24>`, -:ref:`V4L2_PIX_FMT_SBGGR8 <V4L2-PIX-FMT-SBGGR8>`, -:ref:`V4L2_PIX_FMT_SGBRG8 <V4L2-PIX-FMT-SGBRG8>`, -:ref:`V4L2_PIX_FMT_SGRBG8 <V4L2-PIX-FMT-SGRBG8>`, -:ref:`V4L2_PIX_FMT_SN9C10X <V4L2-PIX-FMT-SN9C10X>`, -:ref:`V4L2_PIX_FMT_SN9C20X_I420 <V4L2-PIX-FMT-SN9C20X-I420>`, -:ref:`V4L2_PIX_FMT_SPCA501 <V4L2-PIX-FMT-SPCA501>`, -:ref:`V4L2_PIX_FMT_SPCA505 <V4L2-PIX-FMT-SPCA505>`, -:ref:`V4L2_PIX_FMT_SPCA508 <V4L2-PIX-FMT-SPCA508>`, -:ref:`V4L2_PIX_FMT_SPCA561 <V4L2-PIX-FMT-SPCA561>`, -:ref:`V4L2_PIX_FMT_SQ905C <V4L2-PIX-FMT-SQ905C>`, -:ref:`V4L2_PIX_FMT_SRGGB8 <V4L2-PIX-FMT-SRGGB8>`, -:ref:`V4L2_PIX_FMT_UYVY <V4L2-PIX-FMT-UYVY>`, -:ref:`V4L2_PIX_FMT_YUV420 <V4L2-PIX-FMT-YUV420>`, -:ref:`V4L2_PIX_FMT_YUYV <V4L2-PIX-FMT-YUYV>`, -:ref:`V4L2_PIX_FMT_YVU420 <V4L2-PIX-FMT-YVU420>`, and -:ref:`V4L2_PIX_FMT_YVYU <V4L2-PIX-FMT-YVYU>`. - -Later on libv4lconvert was expanded to also be able to do various video -processing functions to improve webcam video quality. The video -processing is split in to 2 parts: libv4lconvert/control and -libv4lconvert/processing. - -The control part is used to offer video controls which can be used to -control the video processing functions made available by -libv4lconvert/processing. These controls are stored application wide -(until reboot) by using a persistent shared memory object. - -libv4lconvert/processing offers the actual video processing -functionality. - - -libv4l1 -======= - -This library offers functions that can be used to quickly make v4l1 -applications work with v4l2 devices. These functions work exactly like -the normal open/close/etc, except that libv4l1 does full emulation of -the v4l1 api on top of v4l2 drivers, in case of v4l1 drivers it will -just pass calls through. - -Since those functions are emulations of the old V4L1 API, it shouldn't -be used for new applications. - - -libv4l2 -======= - -This library should be used for all modern V4L2 applications. - -It provides handles to call V4L2 open/ioctl/close/poll methods. Instead -of just providing the raw output of the device, it enhances the calls in -the sense that it will use libv4lconvert to provide more video formats -and to enhance the image quality. - -In most cases, libv4l2 just passes the calls directly through to the -v4l2 driver, intercepting the calls to -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>`, -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, -:ref:`VIDIOC_ENUM_FRAMESIZES <VIDIOC_ENUM_FRAMESIZES>` and -:ref:`VIDIOC_ENUM_FRAMEINTERVALS <VIDIOC_ENUM_FRAMEINTERVALS>` in -order to emulate the formats -:ref:`V4L2_PIX_FMT_BGR24 <V4L2-PIX-FMT-BGR24>`, -:ref:`V4L2_PIX_FMT_RGB24 <V4L2-PIX-FMT-RGB24>`, -:ref:`V4L2_PIX_FMT_YUV420 <V4L2-PIX-FMT-YUV420>`, and -:ref:`V4L2_PIX_FMT_YVU420 <V4L2-PIX-FMT-YVU420>`, if they aren't -available in the driver. :ref:`VIDIOC_ENUM_FMT <VIDIOC_ENUM_FMT>` -keeps enumerating the hardware supported formats, plus the emulated -formats offered by libv4l at the end. - - -.. _libv4l-ops: - -Libv4l device control functions -------------------------------- - -The common file operation methods are provided by libv4l. - -Those functions operate just like the gcc function ``dup()`` and -V4L2 functions -:c:func:`open() <v4l2-open>`, :c:func:`close() <v4l2-close>`, -:c:func:`ioctl() <v4l2-ioctl>`, :c:func:`read() <v4l2-read>`, -:c:func:`mmap() <v4l2-mmap>` and :c:func:`munmap() <v4l2-munmap>`: - -.. c:function:: int v4l2_open(const char *file, int oflag, ...) - - operates like the :c:func:`open() <v4l2-open>` function. - -.. c:function:: int v4l2_close(int fd) - - operates like the :c:func:`close() <v4l2-close>` function. - -.. c:function:: int v4l2_dup(int fd) - - operates like the libc ``dup()`` function, duplicating a file handler. - -.. c:function:: int v4l2_ioctl (int fd, unsigned long int request, ...) - - operates like the :c:func:`ioctl() <v4l2-ioctl>` function. - -.. c:function:: int v4l2_read (int fd, void* buffer, size_t n) - - operates like the :c:func:`read() <v4l2-read>` function. - -.. c:function:: void v4l2_mmap(void *start, size_t length, int prot, int flags, int fd, int64_t offset); - - operates like the :c:func:`munmap() <v4l2-munmap>` function. - -.. c:function:: int v4l2_munmap(void *_start, size_t length); - - operates like the :c:func:`munmap() <v4l2-munmap>` function. - -Those functions provide additional control: - -.. c:function:: int v4l2_fd_open(int fd, int v4l2_flags) - - opens an already opened fd for further use through v4l2lib and possibly - modify libv4l2's default behavior through the ``v4l2_flags`` argument. - Currently, ``v4l2_flags`` can be ``V4L2_DISABLE_CONVERSION``, to disable - format conversion. - -.. c:function:: int v4l2_set_control(int fd, int cid, int value) - - This function takes a value of 0 - 65535, and then scales that range to the - actual range of the given v4l control id, and then if the cid exists and is - not locked sets the cid to the scaled value. - -.. c:function:: int v4l2_get_control(int fd, int cid) - - This function returns a value of 0 - 65535, scaled to from the actual range - of the given v4l control id. when the cid does not exist, could not be - accessed for some reason, or some error occurred 0 is returned. - - -v4l1compat.so wrapper library -============================= - -This library intercepts calls to -:c:func:`open() <v4l2-open>`, :c:func:`close() <v4l2-close>`, -:c:func:`ioctl() <v4l2-ioctl>`, :c:func:`mmap() <v4l2-mmap>` and -:c:func:`munmap() <v4l2-munmap>` -operations and redirects them to the libv4l counterparts, by using -``LD_PRELOAD=/usr/lib/v4l1compat.so``. It also emulates V4L1 calls via V4L2 -API. - -It allows usage of binary legacy applications that still don't use -libv4l. diff --git a/Documentation/media/uapi/v4l/libv4l.rst b/Documentation/media/uapi/v4l/libv4l.rst deleted file mode 100644 index d114fbf1ffa6..000000000000 --- a/Documentation/media/uapi/v4l/libv4l.rst +++ /dev/null @@ -1,20 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _libv4l: - -************************ -Libv4l Userspace Library -************************ - - -.. toctree:: - :maxdepth: 1 - - libv4l-introduction diff --git a/Documentation/media/uapi/v4l/meta-formats.rst b/Documentation/media/uapi/v4l/meta-formats.rst deleted file mode 100644 index 74c8659ee9d6..000000000000 --- a/Documentation/media/uapi/v4l/meta-formats.rst +++ /dev/null @@ -1,27 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _meta-formats: - -**************** -Metadata Formats -**************** - -These formats are used for the :ref:`metadata` interface only. - - -.. toctree:: - :maxdepth: 1 - - pixfmt-meta-d4xx - pixfmt-meta-intel-ipu3 - pixfmt-meta-uvc - pixfmt-meta-vsp1-hgo - pixfmt-meta-vsp1-hgt - pixfmt-meta-vivid diff --git a/Documentation/media/uapi/v4l/mmap.rst b/Documentation/media/uapi/v4l/mmap.rst deleted file mode 100644 index c47708bf2c87..000000000000 --- a/Documentation/media/uapi/v4l/mmap.rst +++ /dev/null @@ -1,292 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _mmap: - -****************************** -Streaming I/O (Memory Mapping) -****************************** - -Input and output devices support this I/O method when the -``V4L2_CAP_STREAMING`` flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl is set. There are two -streaming methods, to determine if the memory mapping flavor is -supported applications must call the :ref:`VIDIOC_REQBUFS` ioctl -with the memory type set to ``V4L2_MEMORY_MMAP``. - -Streaming is an I/O method where only pointers to buffers are exchanged -between application and driver, the data itself is not copied. Memory -mapping is primarily intended to map buffers in device memory into the -application's address space. Device memory can be for example the video -memory on a graphics card with a video capture add-on. However, being -the most efficient I/O method available for a long time, many other -drivers support streaming as well, allocating buffers in DMA-able main -memory. - -A driver can support many sets of buffers. Each set is identified by a -unique buffer type value. The sets are independent and each set can hold -a different type of data. To access different sets at the same time -different file descriptors must be used. [#f1]_ - -To allocate device buffers applications call the -:ref:`VIDIOC_REQBUFS` ioctl with the desired number -of buffers and buffer type, for example ``V4L2_BUF_TYPE_VIDEO_CAPTURE``. -This ioctl can also be used to change the number of buffers or to free -the allocated memory, provided none of the buffers are still mapped. - -Before applications can access the buffers they must map them into their -address space with the :ref:`mmap() <func-mmap>` function. The -location of the buffers in device memory can be determined with the -:ref:`VIDIOC_QUERYBUF` ioctl. In the single-planar -API case, the ``m.offset`` and ``length`` returned in a struct -:c:type:`v4l2_buffer` are passed as sixth and second -parameter to the :ref:`mmap() <func-mmap>` function. When using the -multi-planar API, struct :c:type:`v4l2_buffer` contains an -array of struct :c:type:`v4l2_plane` structures, each -containing its own ``m.offset`` and ``length``. When using the -multi-planar API, every plane of every buffer has to be mapped -separately, so the number of calls to :ref:`mmap() <func-mmap>` should -be equal to number of buffers times number of planes in each buffer. The -offset and length values must not be modified. Remember, the buffers are -allocated in physical memory, as opposed to virtual memory, which can be -swapped out to disk. Applications should free the buffers as soon as -possible with the :ref:`munmap() <func-munmap>` function. - -Example: Mapping buffers in the single-planar API -================================================= - -.. code-block:: c - - struct v4l2_requestbuffers reqbuf; - struct { - void *start; - size_t length; - } *buffers; - unsigned int i; - - memset(&reqbuf, 0, sizeof(reqbuf)); - reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - reqbuf.memory = V4L2_MEMORY_MMAP; - reqbuf.count = 20; - - if (-1 == ioctl (fd, VIDIOC_REQBUFS, &reqbuf)) { - if (errno == EINVAL) - printf("Video capturing or mmap-streaming is not supported\\n"); - else - perror("VIDIOC_REQBUFS"); - - exit(EXIT_FAILURE); - } - - /* We want at least five buffers. */ - - if (reqbuf.count < 5) { - /* You may need to free the buffers here. */ - printf("Not enough buffer memory\\n"); - exit(EXIT_FAILURE); - } - - buffers = calloc(reqbuf.count, sizeof(*buffers)); - assert(buffers != NULL); - - for (i = 0; i < reqbuf.count; i++) { - struct v4l2_buffer buffer; - - memset(&buffer, 0, sizeof(buffer)); - buffer.type = reqbuf.type; - buffer.memory = V4L2_MEMORY_MMAP; - buffer.index = i; - - if (-1 == ioctl (fd, VIDIOC_QUERYBUF, &buffer)) { - perror("VIDIOC_QUERYBUF"); - exit(EXIT_FAILURE); - } - - buffers[i].length = buffer.length; /* remember for munmap() */ - - buffers[i].start = mmap(NULL, buffer.length, - PROT_READ | PROT_WRITE, /* recommended */ - MAP_SHARED, /* recommended */ - fd, buffer.m.offset); - - if (MAP_FAILED == buffers[i].start) { - /* If you do not exit here you should unmap() and free() - the buffers mapped so far. */ - perror("mmap"); - exit(EXIT_FAILURE); - } - } - - /* Cleanup. */ - - for (i = 0; i < reqbuf.count; i++) - munmap(buffers[i].start, buffers[i].length); - - -Example: Mapping buffers in the multi-planar API -================================================ - -.. code-block:: c - - struct v4l2_requestbuffers reqbuf; - /* Our current format uses 3 planes per buffer */ - #define FMT_NUM_PLANES = 3 - - struct { - void *start[FMT_NUM_PLANES]; - size_t length[FMT_NUM_PLANES]; - } *buffers; - unsigned int i, j; - - memset(&reqbuf, 0, sizeof(reqbuf)); - reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; - reqbuf.memory = V4L2_MEMORY_MMAP; - reqbuf.count = 20; - - if (ioctl(fd, VIDIOC_REQBUFS, &reqbuf) < 0) { - if (errno == EINVAL) - printf("Video capturing or mmap-streaming is not supported\\n"); - else - perror("VIDIOC_REQBUFS"); - - exit(EXIT_FAILURE); - } - - /* We want at least five buffers. */ - - if (reqbuf.count < 5) { - /* You may need to free the buffers here. */ - printf("Not enough buffer memory\\n"); - exit(EXIT_FAILURE); - } - - buffers = calloc(reqbuf.count, sizeof(*buffers)); - assert(buffers != NULL); - - for (i = 0; i < reqbuf.count; i++) { - struct v4l2_buffer buffer; - struct v4l2_plane planes[FMT_NUM_PLANES]; - - memset(&buffer, 0, sizeof(buffer)); - buffer.type = reqbuf.type; - buffer.memory = V4L2_MEMORY_MMAP; - buffer.index = i; - /* length in struct v4l2_buffer in multi-planar API stores the size - * of planes array. */ - buffer.length = FMT_NUM_PLANES; - buffer.m.planes = planes; - - if (ioctl(fd, VIDIOC_QUERYBUF, &buffer) < 0) { - perror("VIDIOC_QUERYBUF"); - exit(EXIT_FAILURE); - } - - /* Every plane has to be mapped separately */ - for (j = 0; j < FMT_NUM_PLANES; j++) { - buffers[i].length[j] = buffer.m.planes[j].length; /* remember for munmap() */ - - buffers[i].start[j] = mmap(NULL, buffer.m.planes[j].length, - PROT_READ | PROT_WRITE, /* recommended */ - MAP_SHARED, /* recommended */ - fd, buffer.m.planes[j].m.offset); - - if (MAP_FAILED == buffers[i].start[j]) { - /* If you do not exit here you should unmap() and free() - the buffers and planes mapped so far. */ - perror("mmap"); - exit(EXIT_FAILURE); - } - } - } - - /* Cleanup. */ - - for (i = 0; i < reqbuf.count; i++) - for (j = 0; j < FMT_NUM_PLANES; j++) - munmap(buffers[i].start[j], buffers[i].length[j]); - -Conceptually streaming drivers maintain two buffer queues, an incoming -and an outgoing queue. They separate the synchronous capture or output -operation locked to a video clock from the application which is subject -to random disk or network delays and preemption by other processes, -thereby reducing the probability of data loss. The queues are organized -as FIFOs, buffers will be output in the order enqueued in the incoming -FIFO, and were captured in the order dequeued from the outgoing FIFO. - -The driver may require a minimum number of buffers enqueued at all times -to function, apart of this no limit exists on the number of buffers -applications can enqueue in advance, or dequeue and process. They can -also enqueue in a different order than buffers have been dequeued, and -the driver can *fill* enqueued *empty* buffers in any order. [#f2]_ The -index number of a buffer (struct :c:type:`v4l2_buffer` -``index``) plays no role here, it only identifies the buffer. - -Initially all mapped buffers are in dequeued state, inaccessible by the -driver. For capturing applications it is customary to first enqueue all -mapped buffers, then to start capturing and enter the read loop. Here -the application waits until a filled buffer can be dequeued, and -re-enqueues the buffer when the data is no longer needed. Output -applications fill and enqueue buffers, when enough buffers are stacked -up the output is started with :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`. -In the write loop, when the application runs out of free buffers, it -must wait until an empty buffer can be dequeued and reused. - -To enqueue and dequeue a buffer applications use the -:ref:`VIVIOC_QBUF <VIDIOC_QBUF>` and :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` -ioctl. The status of a buffer being mapped, enqueued, full or empty can -be determined at any time using the :ref:`VIDIOC_QUERYBUF` ioctl. Two -methods exist to suspend execution of the application until one or more -buffers can be dequeued. By default :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` -blocks when no buffer is in the outgoing queue. When the ``O_NONBLOCK`` -flag was given to the :ref:`open() <func-open>` function, -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN`` -error code when no buffer is available. The :ref:`select() <func-select>` -or :ref:`poll() <func-poll>` functions are always available. - -To start and stop capturing or output applications call the -:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and :ref:`VIDIOC_STREAMOFF -<VIDIOC_STREAMON>` ioctl. - -.. note:::ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` - removes all buffers from both queues as a side effect. Since there is - no notion of doing anything "now" on a multitasking system, if an - application needs to synchronize with another event it should examine - the struct ::c:type:`v4l2_buffer` ``timestamp`` of captured - or outputted buffers. - -Drivers implementing memory mapping I/O must support the -:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QUERYBUF -<VIDIOC_QUERYBUF>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_DQBUF -<VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` -and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, the :ref:`mmap() -<func-mmap>`, :ref:`munmap() <func-munmap>`, :ref:`select() -<func-select>` and :ref:`poll() <func-poll>` function. [#f3]_ - -[capture example] - -.. [#f1] - One could use one file descriptor and set the buffer type field - accordingly when calling :ref:`VIDIOC_QBUF` etc., - but it makes the :ref:`select() <func-select>` function ambiguous. We also - like the clean approach of one file descriptor per logical stream. - Video overlay for example is also a logical stream, although the CPU - is not needed for continuous operation. - -.. [#f2] - Random enqueue order permits applications processing images out of - order (such as video codecs) to return buffers earlier, reducing the - probability of data loss. Random fill order allows drivers to reuse - buffers on a LIFO-basis, taking advantage of caches holding - scatter-gather lists and the like. - -.. [#f3] - At the driver level :ref:`select() <func-select>` and :ref:`poll() <func-poll>` are - the same, and :ref:`select() <func-select>` is too important to be optional. - The rest should be evident. diff --git a/Documentation/media/uapi/v4l/nv12mt.svg b/Documentation/media/uapi/v4l/nv12mt.svg deleted file mode 100644 index 067d8fb34ba2..000000000000 --- a/Documentation/media/uapi/v4l/nv12mt.svg +++ /dev/null @@ -1,477 +0,0 @@ -<?xml version="1.0" encoding="UTF-8" standalone="no"?> -<!-- - This file is dual-licensed: you can use it either under the terms - of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this - dual licensing only applies to this file, and not this project as a - whole. - - a) This file is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation version 2 of - the License. - - This file is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - Or, alternatively, - - b) Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _open: - -*************************** -Opening and Closing Devices -*************************** - - -Device Naming -============= - -V4L2 drivers are implemented as kernel modules, loaded manually by the -system administrator or automatically when a device is first discovered. -The driver modules plug into the "videodev" kernel module. It provides -helper functions and a common application interface specified in this -document. - -Each driver thus loaded registers one or more device nodes with major -number 81 and a minor number between 0 and 255. Minor numbers are -allocated dynamically unless the kernel is compiled with the kernel -option CONFIG_VIDEO_FIXED_MINOR_RANGES. In that case minor numbers -are allocated in ranges depending on the device node type (video, radio, -etc.). - -Many drivers support "video_nr", "radio_nr" or "vbi_nr" module -options to select specific video/radio/vbi node numbers. This allows the -user to request that the device node is named e.g. /dev/video5 instead -of leaving it to chance. When the driver supports multiple devices of -the same type more than one device node number can be assigned, -separated by commas: - -.. code-block:: none - - # modprobe mydriver video_nr=0,1 radio_nr=0,1 - -In ``/etc/modules.conf`` this may be written as: - -:: - - options mydriver video_nr=0,1 radio_nr=0,1 - -When no device node number is given as module option the driver supplies -a default. - -Normally udev will create the device nodes in /dev automatically for -you. If udev is not installed, then you need to enable the -CONFIG_VIDEO_FIXED_MINOR_RANGES kernel option in order to be able to -correctly relate a minor number to a device node number. I.e., you need -to be certain that minor number 5 maps to device node name video5. With -this kernel option different device types have different minor number -ranges. These ranges are listed in :ref:`devices`. - -The creation of character special files (with mknod) is a privileged -operation and devices cannot be opened by major and minor number. That -means applications cannot *reliably* scan for loaded or installed -drivers. The user must enter a device name, or the application can try -the conventional device names. - - -.. _related: - -Related Devices -=============== - -Devices can support several functions. For example video capturing, VBI -capturing and radio support. - -The V4L2 API creates different nodes for each of these functions. - -The V4L2 API was designed with the idea that one device node could -support all functions. However, in practice this never worked: this -'feature' was never used by applications and many drivers did not -support it and if they did it was certainly never tested. In addition, -switching a device node between different functions only works when -using the streaming I/O API, not with the -:ref:`read() <func-read>`/\ :ref:`write() <func-write>` API. - -Today each device node supports just one function. - -Besides video input or output the hardware may also support audio -sampling or playback. If so, these functions are implemented as ALSA PCM -devices with optional ALSA audio mixer devices. - -One problem with all these devices is that the V4L2 API makes no -provisions to find these related devices. Some really complex devices -use the Media Controller (see :ref:`media_controller`) which can be -used for this purpose. But most drivers do not use it, and while some -code exists that uses sysfs to discover related devices (see -libmedia_dev in the -`v4l-utils <http://git.linuxtv.org/cgit.cgi/v4l-utils.git/>`__ git -repository), there is no library yet that can provide a single API -towards both Media Controller-based devices and devices that do not use -the Media Controller. If you want to work on this please write to the -linux-media mailing list: -`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__. - - -Multiple Opens -============== - -V4L2 devices can be opened more than once. [#f1]_ When this is supported -by the driver, users can for example start a "panel" application to -change controls like brightness or audio volume, while another -application captures video and audio. In other words, panel applications -are comparable to an ALSA audio mixer application. Just opening a V4L2 -device should not change the state of the device. [#f2]_ - -Once an application has allocated the memory buffers needed for -streaming data (by calling the :ref:`VIDIOC_REQBUFS` -or :ref:`VIDIOC_CREATE_BUFS` ioctls, or -implicitly by calling the :ref:`read() <func-read>` or -:ref:`write() <func-write>` functions) that application (filehandle) -becomes the owner of the device. It is no longer allowed to make changes -that would affect the buffer sizes (e.g. by calling the -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl) and other applications are -no longer allowed to allocate buffers or start or stop streaming. The -EBUSY error code will be returned instead. - -Merely opening a V4L2 device does not grant exclusive access. [#f3]_ -Initiating data exchange however assigns the right to read or write the -requested type of data, and to change related properties, to this file -descriptor. Applications can request additional access privileges using -the priority mechanism described in :ref:`app-pri`. - - -Shared Data Streams -=================== - -V4L2 drivers should not support multiple applications reading or writing -the same data stream on a device by copying buffers, time multiplexing -or similar means. This is better handled by a proxy application in user -space. - - -Functions -========= - -To open and close V4L2 devices applications use the -:ref:`open() <func-open>` and :ref:`close() <func-close>` function, -respectively. Devices are programmed using the -:ref:`ioctl() <func-ioctl>` function as explained in the following -sections. - -.. [#f1] - There are still some old and obscure drivers that have not been - updated to allow for multiple opens. This implies that for such - drivers :ref:`open() <func-open>` can return an ``EBUSY`` error code - when the device is already in use. - -.. [#f2] - Unfortunately, opening a radio device often switches the state of the - device to radio mode in many drivers. This behavior should be fixed - eventually as it violates the V4L2 specification. - -.. [#f3] - Drivers could recognize the ``O_EXCL`` open flag. Presently this is - not required, so applications cannot know if it really works. diff --git a/Documentation/media/uapi/v4l/pipeline.dot b/Documentation/media/uapi/v4l/pipeline.dot deleted file mode 100644 index 8c53ce719a14..000000000000 --- a/Documentation/media/uapi/v4l/pipeline.dot +++ /dev/null @@ -1,14 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 - -digraph board { - rankdir=TB - colorscheme=x11 - scaler [label="{<scaler_0> 0} | Host\nScaler | {<scaler_1> 1} ", shape=Mrecord, style=filled, fillcolor=lightblue] - frontend [label="{<frontend_0> 0} | Host\nFrontend | {<frontend_1> 1}", shape=Mrecord, style=filled, fillcolor=lightblue] - sensor [label="Sensor | {<sensor_0> 0}", shape=Mrecord, style=filled, fillcolor=aquamarine] - io [label="{<io_0> 0} | V4L I/O", shape=Mrecord, style=filled, fillcolor=aquamarine] - - sensor:sensor_0 -> frontend:frontend_0 [color=blue, label="HQ: 2592x1968\nHS: 1296x984"] - frontend:frontend_1 -> scaler:scaler_0 [color=blue, label="HQ: 2592x1968\nHS: 1296x984"] - scaler:scaler_1 -> io:io_0 [color=blue, label="HQ: 1280x720\nHS: 1280x720"] -} diff --git a/Documentation/media/uapi/v4l/pixfmt-bayer.rst b/Documentation/media/uapi/v4l/pixfmt-bayer.rst deleted file mode 100644 index 807ab34ba93b..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-bayer.rst +++ /dev/null @@ -1,39 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _pixfmt-bayer: - -***************** -Raw Bayer Formats -***************** - -Description -=========== - -The raw Bayer formats are used by image sensors before much if any processing is -performed on the image. The formats contain green, red and blue components, with -alternating lines of red and green, and blue and green pixels in different -orders. See also `the Wikipedia article on Bayer filter -<https://en.wikipedia.org/wiki/Bayer_filter>`__. - - -.. toctree:: - :maxdepth: 1 - - pixfmt-srggb8 - pixfmt-srggb10 - pixfmt-srggb10p - pixfmt-srggb10alaw8 - pixfmt-srggb10dpcm8 - pixfmt-srggb10-ipu3 - pixfmt-srggb12 - pixfmt-srggb12p - pixfmt-srggb14 - pixfmt-srggb14p - pixfmt-srggb16 diff --git a/Documentation/media/uapi/v4l/pixfmt-cnf4.rst b/Documentation/media/uapi/v4l/pixfmt-cnf4.rst deleted file mode 100644 index 8f469290c304..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-cnf4.rst +++ /dev/null @@ -1,31 +0,0 @@ -.. -*- coding: utf-8; mode: rst -*- - -.. _V4L2-PIX-FMT-CNF4: - -****************************** -V4L2_PIX_FMT_CNF4 ('CNF4') -****************************** - -Depth sensor confidence information as a 4 bits per pixel packed array - -Description -=========== - -Proprietary format used by Intel RealSense Depth cameras containing depth -confidence information in range 0-15 with 0 indicating that the sensor was -unable to resolve any signal and 15 indicating maximum level of confidence for -the specific sensor (actual error margins might change from sensor to sensor). - -Every two consecutive pixels are packed into a single byte. -Bits 0-3 of byte n refer to confidence value of depth pixel 2*n, -bits 4-7 to confidence value of depth pixel 2*n+1. - -**Bit-packed representation.** - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 64 64 - - * - Y'\ :sub:`01[3:0]`\ (bits 7--4) Y'\ :sub:`00[3:0]`\ (bits 3--0) - - Y'\ :sub:`03[3:0]`\ (bits 7--4) Y'\ :sub:`02[3:0]`\ (bits 3--0) diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst deleted file mode 100644 index 561bda112809..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst +++ /dev/null @@ -1,232 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -****************** -Compressed Formats -****************** - - -.. _compressed-formats: - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: Compressed Image Formats - :header-rows: 1 - :stub-columns: 0 - :widths: 3 1 4 - - * - Identifier - - Code - - Details - * .. _V4L2-PIX-FMT-JPEG: - - - ``V4L2_PIX_FMT_JPEG`` - - 'JPEG' - - TBD. See also :ref:`VIDIOC_G_JPEGCOMP <VIDIOC_G_JPEGCOMP>`, - :ref:`VIDIOC_S_JPEGCOMP <VIDIOC_G_JPEGCOMP>`. - * .. _V4L2-PIX-FMT-MPEG: - - - ``V4L2_PIX_FMT_MPEG`` - - 'MPEG' - - MPEG multiplexed stream. The actual format is determined by - extended control ``V4L2_CID_MPEG_STREAM_TYPE``, see - :ref:`mpeg-control-id`. - * .. _V4L2-PIX-FMT-H264: - - - ``V4L2_PIX_FMT_H264`` - - 'H264' - - H264 Access Unit. - The decoder expects one Access Unit per buffer. - The encoder generates one Access Unit per buffer. - If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` - then the decoder has no requirements since it can parse all the - information from the raw bytestream. - * .. _V4L2-PIX-FMT-H264-NO-SC: - - - ``V4L2_PIX_FMT_H264_NO_SC`` - - 'AVC1' - - H264 video elementary stream without start codes. - * .. _V4L2-PIX-FMT-H264-MVC: - - - ``V4L2_PIX_FMT_H264_MVC`` - - 'M264' - - H264 MVC video elementary stream. - * .. _V4L2-PIX-FMT-H264-SLICE: - - - ``V4L2_PIX_FMT_H264_SLICE`` - - 'S264' - - H264 parsed slice data, including slice headers, either with or - without the start code, as extracted from the H264 bitstream. - This format is adapted for stateless video decoders that implement an - H264 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). - This pixelformat has two modifiers that must be set at least once - through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE`` - and ``V4L2_CID_MPEG_VIDEO_H264_START_CODE`` controls. - In addition, metadata associated with the frame to decode are - required to be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``, - ``V4L2_CID_MPEG_VIDEO_H264_PPS``, - ``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``, - ``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS`` and - ``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS`` controls. See the - :ref:`associated Codec Control IDs <v4l2-mpeg-h264>`. Exactly - one output and one capture buffer must be provided for use - with this pixel format. The output buffer must contain the - appropriate number of macroblocks to decode a full - corresponding frame to the matching capture buffer. - - The syntax for this format is documented in :ref:`h264`, section - 7.3.2.8 "Slice layer without partitioning RBSP syntax" and the following - sections. - - .. note:: - - This format is not yet part of the public kernel API and it - is expected to change. - - * .. _V4L2-PIX-FMT-H263: - - - ``V4L2_PIX_FMT_H263`` - - 'H263' - - H263 video elementary stream. - * .. _V4L2-PIX-FMT-MPEG1: - - - ``V4L2_PIX_FMT_MPEG1`` - - 'MPG1' - - MPEG1 Picture. Each buffer starts with a Picture header, followed - by other headers as needed and ending with the Picture data. - If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` - then the decoder has no requirements since it can parse all the - information from the raw bytestream. - * .. _V4L2-PIX-FMT-MPEG2: - - - ``V4L2_PIX_FMT_MPEG2`` - - 'MPG2' - - MPEG2 Picture. Each buffer starts with a Picture header, followed - by other headers as needed and ending with the Picture data. - If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` - then the decoder has no requirements since it can parse all the - information from the raw bytestream. - * .. _V4L2-PIX-FMT-MPEG2-SLICE: - - - ``V4L2_PIX_FMT_MPEG2_SLICE`` - - 'MG2S' - - MPEG-2 parsed slice data, as extracted from the MPEG-2 bitstream. - This format is adapted for stateless video decoders that implement a - MPEG-2 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). - Metadata associated with the frame to decode is required to be passed - through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS`` control and - quantization matrices can optionally be specified through the - ``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION`` control. - See the :ref:`associated Codec Control IDs <v4l2-mpeg-mpeg2>`. - Exactly one output and one capture buffer must be provided for use with - this pixel format. The output buffer must contain the appropriate number - of macroblocks to decode a full corresponding frame to the matching - capture buffer. - * .. _V4L2-PIX-FMT-MPEG4: - - - ``V4L2_PIX_FMT_MPEG4`` - - 'MPG4' - - MPEG4 video elementary stream. - * .. _V4L2-PIX-FMT-XVID: - - - ``V4L2_PIX_FMT_XVID`` - - 'XVID' - - Xvid video elementary stream. - * .. _V4L2-PIX-FMT-VC1-ANNEX-G: - - - ``V4L2_PIX_FMT_VC1_ANNEX_G`` - - 'VC1G' - - VC1, SMPTE 421M Annex G compliant stream. - * .. _V4L2-PIX-FMT-VC1-ANNEX-L: - - - ``V4L2_PIX_FMT_VC1_ANNEX_L`` - - 'VC1L' - - VC1, SMPTE 421M Annex L compliant stream. - * .. _V4L2-PIX-FMT-VP8: - - - ``V4L2_PIX_FMT_VP8`` - - 'VP80' - - VP8 compressed video frame. The encoder generates one - compressed frame per buffer, and the decoder requires one - compressed frame per buffer. - * .. _V4L2-PIX-FMT-VP8-FRAME: - - - ``V4L2_PIX_FMT_VP8_FRAME`` - - 'VP8F' - - VP8 parsed frame, as extracted from the container. - This format is adapted for stateless video decoders that implement a - VP8 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). - Metadata associated with the frame to decode is required to be passed - through the ``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER`` control. - See the :ref:`associated Codec Control IDs <v4l2-mpeg-vp8>`. - Exactly one output and one capture buffer must be provided for use with - this pixel format. The output buffer must contain the appropriate number - of macroblocks to decode a full corresponding frame to the matching - capture buffer. - - .. note:: - - This format is not yet part of the public kernel API and it - is expected to change. - - * .. _V4L2-PIX-FMT-VP9: - - - ``V4L2_PIX_FMT_VP9`` - - 'VP90' - - VP9 compressed video frame. The encoder generates one - compressed frame per buffer, and the decoder requires one - compressed frame per buffer. - * .. _V4L2-PIX-FMT-HEVC: - - - ``V4L2_PIX_FMT_HEVC`` - - 'HEVC' - - HEVC/H.265 Access Unit. - The decoder expects one Access Unit per buffer. - The encoder generates one Access Unit per buffer. - If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` - then the decoder has no requirements since it can parse all the - information from the raw bytestream. - * .. _V4L2-PIX-FMT-HEVC-SLICE: - - - ``V4L2_PIX_FMT_HEVC_SLICE`` - - 'S265' - - HEVC parsed slice data, as extracted from the HEVC bitstream. - This format is adapted for stateless video decoders that implement a - HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). - This pixelformat has two modifiers that must be set at least once - through the ``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE`` - and ``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE`` controls. - Metadata associated with the frame to decode is required to be passed - through the following controls : - * ``V4L2_CID_MPEG_VIDEO_HEVC_SPS`` - * ``V4L2_CID_MPEG_VIDEO_HEVC_PPS`` - * ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS`` - See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`. - Buffers associated with this pixel format must contain the appropriate - number of macroblocks to decode a full corresponding frame. - - .. note:: - - This format is not yet part of the public kernel API and it - is expected to change. - * .. _V4L2-PIX-FMT-FWHT: - - - ``V4L2_PIX_FMT_FWHT`` - - 'FWHT' - - Video elementary stream using a codec based on the Fast Walsh Hadamard - Transform. This codec is implemented by the vicodec ('Virtual Codec') - driver. See the codec-fwht.h header for more details. - :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` - since the decoder can parse all the information from the raw bytestream. - * .. _V4L2-PIX-FMT-FWHT-STATELESS: - - - ``V4L2_PIX_FMT_FWHT_STATELESS`` - - 'SFWH' - - Same format as V4L2_PIX_FMT_FWHT but requires stateless codec implementation. - See the :ref:`associated Codec Control IDs <v4l2-mpeg-fwht>`. diff --git a/Documentation/media/uapi/v4l/pixfmt-grey.rst b/Documentation/media/uapi/v4l/pixfmt-grey.rst deleted file mode 100644 index 3a8156164d39..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-grey.rst +++ /dev/null @@ -1,51 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-GREY: - -************************** -V4L2_PIX_FMT_GREY ('GREY') -************************** - -Grey-scale image - - -Description -=========== - -This is a grey-scale image. It is really a degenerate Y'CbCr format -which simply contains no Cb or Cr data. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` diff --git a/Documentation/media/uapi/v4l/pixfmt-indexed.rst b/Documentation/media/uapi/v4l/pixfmt-indexed.rst deleted file mode 100644 index 4538b425a046..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-indexed.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _pixfmt-indexed: - -************** -Indexed Format -************** - -In this format each pixel is represented by an 8 bit index into a 256 -entry ARGB palette. It is intended for -:ref:`Video Output Overlays <osd>` only. There are no ioctls to access -the palette, this must be done with ioctls of the Linux framebuffer API. - - - -.. flat-table:: Indexed Image Format - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - - - :cspan:`7` Byte 0 - * - - - - - Bit - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _V4L2-PIX-FMT-PAL8: - - - ``V4L2_PIX_FMT_PAL8`` - - 'PAL8' - - - - i\ :sub:`7` - - i\ :sub:`6` - - i\ :sub:`5` - - i\ :sub:`4` - - i\ :sub:`3` - - i\ :sub:`2` - - i\ :sub:`1` - - i\ :sub:`0` diff --git a/Documentation/media/uapi/v4l/pixfmt-intro.rst b/Documentation/media/uapi/v4l/pixfmt-intro.rst deleted file mode 100644 index ca0a6e0d8959..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-intro.rst +++ /dev/null @@ -1,58 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -********************** -Standard Image Formats -********************** - -In order to exchange images between drivers and applications, it is -necessary to have standard image data formats which both sides will -interpret the same way. V4L2 includes several such formats, and this -section is intended to be an unambiguous specification of the standard -image data formats in V4L2. - -V4L2 drivers are not limited to these formats, however. Driver-specific -formats are possible. In that case the application may depend on a codec -to convert images to one of the standard formats when needed. But the -data can still be stored and retrieved in the proprietary format. For -example, a device may support a proprietary compressed format. -Applications can still capture and save the data in the compressed -format, saving much disk space, and later use a codec to convert the -images to the X Windows screen format when the video is to be displayed. - -Even so, ultimately, some standard formats are needed, so the V4L2 -specification would not be complete without well-defined standard -formats. - -The V4L2 standard formats are mainly uncompressed formats. The pixels -are always arranged in memory from left to right, and from top to -bottom. The first byte of data in the image buffer is always for the -leftmost pixel of the topmost row. Following that is the pixel -immediately to its right, and so on until the end of the top row of -pixels. Following the rightmost pixel of the row there may be zero or -more bytes of padding to guarantee that each row of pixel data has a -certain alignment. Following the pad bytes, if any, is data for the -leftmost pixel of the second row from the top, and so on. The last row -has just as many pad bytes after it as the other rows. - -In V4L2 each format has an identifier which looks like ``PIX_FMT_XXX``, -defined in the :ref:`videodev2.h <videodev>` header file. These -identifiers represent -:ref:`four character (FourCC) codes <v4l2-fourcc>` which are also -listed below, however they are not the same as those used in the Windows -world. - -For some formats, data is stored in separate, discontiguous memory -buffers. Those formats are identified by a separate set of FourCC codes -and are referred to as "multi-planar formats". For example, a -:ref:`YUV422 <V4L2-PIX-FMT-YUV422M>` frame is normally stored in one -memory buffer, but it can also be placed in two or three separate -buffers, with Y component in one buffer and CbCr components in another -in the 2-planar version or with each component in its own buffer in the -3-planar case. Those sub-buffers are referred to as "*planes*". diff --git a/Documentation/media/uapi/v4l/pixfmt-inzi.rst b/Documentation/media/uapi/v4l/pixfmt-inzi.rst deleted file mode 100644 index af2940d844ff..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-inzi.rst +++ /dev/null @@ -1,89 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-INZI: - -************************** -V4L2_PIX_FMT_INZI ('INZI') -************************** - -Infrared 10-bit linked with Depth 16-bit images - - -Description -=========== - -Proprietary multi-planar format used by Intel SR300 Depth cameras, comprise of -Infrared image followed by Depth data. The pixel definition is 32-bpp, -with the Depth and Infrared Data split into separate continuous planes of -identical dimensions. - - - -The first plane - Infrared data - is stored according to -:ref:`V4L2_PIX_FMT_Y10 <V4L2-PIX-FMT-Y10>` greyscale format. -Each pixel is 16-bit cell, with actual data stored in the 10 LSBs -with values in range 0 to 1023. -The six remaining MSBs are padded with zeros. - - -The second plane provides 16-bit per-pixel Depth data arranged in -:ref:`V4L2-PIX-FMT-Z16 <V4L2-PIX-FMT-Z16>` format. - - -**Frame Structure.** -Each cell is a 16-bit word with more significant data stored at higher -memory address (byte order is little-endian). - - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{2.5cm}|p{2.5cm}|p{2.5cm}|p{2.5cm}|p{2.5cm}|p{2.5cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 1 - :widths: 1 1 1 1 1 1 - - * - Ir\ :sub:`0,0` - - Ir\ :sub:`0,1` - - Ir\ :sub:`0,2` - - ... - - ... - - ... - * - :cspan:`5` ... - * - :cspan:`5` Infrared Data - * - :cspan:`5` ... - * - ... - - ... - - ... - - Ir\ :sub:`n-1,n-3` - - Ir\ :sub:`n-1,n-2` - - Ir\ :sub:`n-1,n-1` - * - Depth\ :sub:`0,0` - - Depth\ :sub:`0,1` - - Depth\ :sub:`0,2` - - ... - - ... - - ... - * - :cspan:`5` ... - * - :cspan:`5` Depth Data - * - :cspan:`5` ... - * - ... - - ... - - ... - - Depth\ :sub:`n-1,n-3` - - Depth\ :sub:`n-1,n-2` - - Depth\ :sub:`n-1,n-1` - -.. raw:: latex - - \normalsize diff --git a/Documentation/media/uapi/v4l/pixfmt-m420.rst b/Documentation/media/uapi/v4l/pixfmt-m420.rst deleted file mode 100644 index c2bae959bf51..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-m420.rst +++ /dev/null @@ -1,133 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-M420: - -************************** -V4L2_PIX_FMT_M420 ('M420') -************************** - -Format with ½ horizontal and vertical chroma resolution, also known as -YUV 4:2:0. Hybrid plane line-interleaved layout. - - -Description -=========== - -M420 is a YUV format with ½ horizontal and vertical chroma subsampling -(YUV 4:2:0). Pixels are organized as interleaved luma and chroma planes. -Two lines of luma data are followed by one line of chroma data. - -The luma plane has one byte per pixel. The chroma plane contains -interleaved CbCr pixels subsampled by ½ in the horizontal and vertical -directions. Each CbCr pair belongs to four pixels. For example, -Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, -Y'\ :sub:`10`, Y'\ :sub:`11`. - -All line lengths are identical: if the Y lines include pad bytes so do -the CbCr lines. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`01` - - Cr\ :sub:`01` - * - start + 16: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 20: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 24: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`11` - - Cr\ :sub:`11` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 1 - - Y - - - - Y - - Y - - - - Y - * - - * - 2 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 3 - - Y - - - - Y - - Y - - - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-d4xx.rst b/Documentation/media/uapi/v4l/pixfmt-meta-d4xx.rst deleted file mode 100644 index 87e8fd7d5d02..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-meta-d4xx.rst +++ /dev/null @@ -1,220 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-meta-fmt-d4xx: - -******************************* -V4L2_META_FMT_D4XX ('D4XX') -******************************* - -Intel D4xx UVC Cameras Metadata - - -Description -=========== - -Intel D4xx (D435 and other) cameras include per-frame metadata in their UVC -payload headers, following the Microsoft(R) UVC extension proposal [1_]. That -means, that the private D4XX metadata, following the standard UVC header, is -organised in blocks. D4XX cameras implement several standard block types, -proposed by Microsoft, and several proprietary ones. Supported standard metadata -types are MetadataId_CaptureStats (ID 3), MetadataId_CameraExtrinsics (ID 4), -and MetadataId_CameraIntrinsics (ID 5). For their description see [1_]. This -document describes proprietary metadata types, used by D4xx cameras. - -V4L2_META_FMT_D4XX buffers follow the metadata buffer layout of -V4L2_META_FMT_UVC with the only difference, that it also includes proprietary -payload header data. D4xx cameras use bulk transfers and only send one payload -per frame, therefore their headers cannot be larger than 255 bytes. - -Below are proprietary Microsoft style metadata types, used by D4xx cameras, -where all fields are in little endian order: - -.. tabularcolumns:: |p{5.0cm}|p{12.5cm}| - - -.. flat-table:: D4xx metadata - :widths: 1 2 - :header-rows: 1 - :stub-columns: 0 - - * - **Field** - - **Description** - * - :cspan:`1` *Depth Control* - * - __u32 ID - - 0x80000000 - * - __u32 Size - - Size in bytes (currently 56) - * - __u32 Version - - Version of this structure. The documentation herein corresponds to - version xxx. The version number will be incremented when new fields are - added. - * - __u32 Flags - - A bitmask of flags: see [2_] below - * - __u32 Gain - - Gain value in internal units, same as the V4L2_CID_GAIN control, used to - capture the frame - * - __u32 Exposure - - Exposure time (in microseconds) used to capture the frame - * - __u32 Laser power - - Power of the laser LED 0-360, used for depth measurement - * - __u32 AE mode - - 0: manual; 1: automatic exposure - * - __u32 Exposure priority - - Exposure priority value: 0 - constant frame rate - * - __u32 AE ROI left - - Left border of the AE Region of Interest (all ROI values are in pixels - and lie between 0 and maximum width or height respectively) - * - __u32 AE ROI right - - Right border of the AE Region of Interest - * - __u32 AE ROI top - - Top border of the AE Region of Interest - * - __u32 AE ROI bottom - - Bottom border of the AE Region of Interest - * - __u32 Preset - - Preset selector value, default: 0, unless changed by the user - * - __u32 Laser mode - - 0: off, 1: on - * - :cspan:`1` *Capture Timing* - * - __u32 ID - - 0x80000001 - * - __u32 Size - - Size in bytes (currently 40) - * - __u32 Version - - Version of this structure. The documentation herein corresponds to - version xxx. The version number will be incremented when new fields are - added. - * - __u32 Flags - - A bitmask of flags: see [3_] below - * - __u32 Frame counter - - Monotonically increasing counter - * - __u32 Optical time - - Time in microseconds from the beginning of a frame till its middle - * - __u32 Readout time - - Time, used to read out a frame in microseconds - * - __u32 Exposure time - - Frame exposure time in microseconds - * - __u32 Frame interval - - In microseconds = 1000000 / framerate - * - __u32 Pipe latency - - Time in microseconds from start of frame to data in USB buffer - * - :cspan:`1` *Configuration* - * - __u32 ID - - 0x80000002 - * - __u32 Size - - Size in bytes (currently 40) - * - __u32 Version - - Version of this structure. The documentation herein corresponds to - version xxx. The version number will be incremented when new fields are - added. - * - __u32 Flags - - A bitmask of flags: see [4_] below - * - __u8 Hardware type - - Camera hardware version [5_] - * - __u8 SKU ID - - Camera hardware configuration [6_] - * - __u32 Cookie - - Internal synchronisation - * - __u16 Format - - Image format code [7_] - * - __u16 Width - - Width in pixels - * - __u16 Height - - Height in pixels - * - __u16 Framerate - - Requested frame rate per second - * - __u16 Trigger - - Byte 0: bit 0: depth and RGB are synchronised, bit 1: external trigger - -.. _1: - -[1] https://docs.microsoft.com/en-us/windows-hardware/drivers/stream/uvc-extensions-1-5 - -.. _2: - -[2] Depth Control flags specify which fields are valid: :: - - 0x00000001 Gain - 0x00000002 Exposure - 0x00000004 Laser power - 0x00000008 AE mode - 0x00000010 Exposure priority - 0x00000020 AE ROI - 0x00000040 Preset - -.. _3: - -[3] Capture Timing flags specify which fields are valid: :: - - 0x00000001 Frame counter - 0x00000002 Optical time - 0x00000004 Readout time - 0x00000008 Exposure time - 0x00000010 Frame interval - 0x00000020 Pipe latency - -.. _4: - -[4] Configuration flags specify which fields are valid: :: - - 0x00000001 Hardware type - 0x00000002 SKU ID - 0x00000004 Cookie - 0x00000008 Format - 0x00000010 Width - 0x00000020 Height - 0x00000040 Framerate - 0x00000080 Trigger - 0x00000100 Cal count - -.. _5: - -[5] Camera model: :: - - 0 DS5 - 1 IVCAM2 - -.. _6: - -[6] 8-bit camera hardware configuration bitfield: :: - - [1:0] depthCamera - 00: no depth - 01: standard depth - 10: wide depth - 11: reserved - [2] depthIsActive - has a laser projector - [3] RGB presence - [4] Inertial Measurement Unit (IMU) presence - [5] projectorType - 0: HPTG - 1: Princeton - [6] 0: a projector, 1: an LED - [7] reserved - -.. _7: - -[7] Image format codes per video streaming interface: - -Depth: :: - - 1 Z16 - 2 Z - -Left sensor: :: - - 1 Y8 - 2 UYVY - 3 R8L8 - 4 Calibration - 5 W10 - -Fish Eye sensor: :: - - 1 RAW8 diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-intel-ipu3.rst b/Documentation/media/uapi/v4l/pixfmt-meta-intel-ipu3.rst deleted file mode 100644 index 7fb54339f4a7..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-meta-intel-ipu3.rst +++ /dev/null @@ -1,104 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License version -.. 2.0 as published by the Free Software Foundation. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License version 2.0 for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-meta-fmt-params: -.. _v4l2-meta-fmt-stat-3a: - -****************************************************************** -V4L2_META_FMT_IPU3_PARAMS ('ip3p'), V4L2_META_FMT_IPU3_3A ('ip3s') -****************************************************************** - -.. ipu3_uapi_stats_3a - -3A statistics -============= - -The IPU3 ImgU 3A statistics accelerators collect different statistics over -an input Bayer frame. Those statistics are obtained from the "ipu3-imgu [01] 3a -stat" metadata capture video nodes, using the :c:type:`v4l2_meta_format` -interface. They are formatted as described by the :c:type:`ipu3_uapi_stats_3a` -structure. - -The statistics collected are AWB (Auto-white balance) RGBS (Red, Green, Blue and -Saturation measure) cells, AWB filter response, AF (Auto-focus) filter response, -and AE (Auto-exposure) histogram. - -The struct :c:type:`ipu3_uapi_4a_config` saves all configurable parameters. - -.. code-block:: c - - struct ipu3_uapi_stats_3a { - struct ipu3_uapi_awb_raw_buffer awb_raw_buffer; - struct ipu3_uapi_ae_raw_buffer_aligned ae_raw_buffer[IPU3_UAPI_MAX_STRIPES]; - struct ipu3_uapi_af_raw_buffer af_raw_buffer; - struct ipu3_uapi_awb_fr_raw_buffer awb_fr_raw_buffer; - struct ipu3_uapi_4a_config stats_4a_config; - __u32 ae_join_buffers; - __u8 padding[28]; - struct ipu3_uapi_stats_3a_bubble_info_per_stripe stats_3a_bubble_per_stripe; - struct ipu3_uapi_ff_status stats_3a_status; - }; - -.. ipu3_uapi_params - -Pipeline parameters -=================== - -The pipeline parameters are passed to the "ipu3-imgu [01] parameters" metadata -output video nodes, using the :c:type:`v4l2_meta_format` interface. They are -formatted as described by the :c:type:`ipu3_uapi_params` structure. - -Both 3A statistics and pipeline parameters described here are closely tied to -the underlying camera sub-system (CSS) APIs. They are usually consumed and -produced by dedicated user space libraries that comprise the important tuning -tools, thus freeing the developers from being bothered with the low level -hardware and algorithm details. - -.. code-block:: c - - struct ipu3_uapi_params { - /* Flags which of the settings below are to be applied */ - struct ipu3_uapi_flags use; - - /* Accelerator cluster parameters */ - struct ipu3_uapi_acc_param acc_param; - - /* ISP vector address space parameters */ - struct ipu3_uapi_isp_lin_vmem_params lin_vmem_params; - struct ipu3_uapi_isp_tnr3_vmem_params tnr3_vmem_params; - struct ipu3_uapi_isp_xnr3_vmem_params xnr3_vmem_params; - - /* ISP data memory (DMEM) parameters */ - struct ipu3_uapi_isp_tnr3_params tnr3_dmem_params; - struct ipu3_uapi_isp_xnr3_params xnr3_dmem_params; - - /* Optical black level compensation */ - struct ipu3_uapi_obgrid_param obgrid_param; - }; - -Intel IPU3 ImgU uAPI data types -=============================== - -.. kernel-doc:: drivers/staging/media/ipu3/include/intel-ipu3.h diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-uvc.rst b/Documentation/media/uapi/v4l/pixfmt-meta-uvc.rst deleted file mode 100644 index 481e4e0e6e1d..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-meta-uvc.rst +++ /dev/null @@ -1,58 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-meta-fmt-uvc: - -******************************* -V4L2_META_FMT_UVC ('UVCH') -******************************* - -UVC Payload Header Data - - -Description -=========== - -This format describes standard UVC metadata, extracted from UVC packet headers -and provided by the UVC driver through metadata video nodes. That data includes -exact copies of the standard part of UVC Payload Header contents and auxiliary -timing information, required for precise interpretation of timestamps, contained -in those headers. See section "2.4.3.3 Video and Still Image Payload Headers" of -the "UVC 1.5 Class specification" for details. - -Each UVC payload header can be between 2 and 12 bytes large. Buffers can -contain multiple headers, if multiple such headers have been transmitted by the -camera for the respective frame. However, the driver may drop headers when the -buffer is full, when they contain no useful information (e.g. those without the -SCR field or with that field identical to the previous header), or generally to -perform rate limiting when the device sends a large number of headers. - -Each individual block contains the following fields: - -.. flat-table:: UVC Metadata Block - :widths: 1 4 - :header-rows: 1 - :stub-columns: 0 - - * - Field - - Description - * - __u64 ts; - - system timestamp in host byte order, measured by the driver upon - reception of the payload - * - __u16 sof; - - USB Frame Number in host byte order, also obtained by the driver as - close as possible to the above timestamp to enable correlation between - them - * - :cspan:`1` *The rest is an exact copy of the UVC payload header:* - * - __u8 length; - - length of the rest of the block, including this field - * - __u8 flags; - - Flags, indicating presence of other standard UVC fields - * - __u8 buf[]; - - The rest of the header, possibly including UVC PTS and SCR fields diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst b/Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst deleted file mode 100644 index eed20eaefe24..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst +++ /dev/null @@ -1,60 +0,0 @@ -.. This file is dual-licensed: you can use it either under the terms -.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this -.. dual licensing only applies to this file, and not this project as a -.. whole. -.. -.. a) This file is free software; you can redistribute it and/or -.. modify it under the terms of the GNU General Public License as -.. published by the Free Software Foundation version 2 of -.. the License. -.. -.. This file is distributed in the hope that it will be useful, -.. but WITHOUT ANY WARRANTY; without even the implied warranty of -.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -.. GNU General Public License for more details. -.. -.. Or, alternatively, -.. -.. b) Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-meta-fmt-vivid: - -******************************* -V4L2_META_FMT_VIVID ('VIVD') -******************************* - -VIVID Metadata Format - - -Description -=========== - -This describes metadata format used by the vivid driver. - -It sets Brightness, Saturation, Contrast and Hue, each of which maps to -corresponding controls of the vivid driver with respect to the range and default values. - -It contains the following fields: - -.. flat-table:: VIVID Metadata - :widths: 1 4 - :header-rows: 1 - :stub-columns: 0 - - * - Field - - Description - * - u16 brightness; - - Image brightness, the value is in the range 0 to 255, with the default value as 128. - * - u16 contrast; - - Image contrast, the value is in the range 0 to 255, with the default value as 128. - * - u16 saturation; - - Image color saturation, the value is in the range 0 to 255, with the default value as 128. - * - s16 hue; - - Image color balance, the value is in the range -128 to 128, with the default value as 0. diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-vsp1-hgo.rst b/Documentation/media/uapi/v4l/pixfmt-meta-vsp1-hgo.rst deleted file mode 100644 index f7a861696281..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-meta-vsp1-hgo.rst +++ /dev/null @@ -1,175 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-meta-fmt-vsp1-hgo: - -******************************* -V4L2_META_FMT_VSP1_HGO ('VSPH') -******************************* - -Renesas R-Car VSP1 1-D Histogram Data - - -Description -=========== - -This format describes histogram data generated by the Renesas R-Car VSP1 1-D -Histogram (HGO) engine. - -The VSP1 HGO is a histogram computation engine that can operate on RGB, YCrCb -or HSV data. It operates on a possibly cropped and subsampled input image and -computes the minimum, maximum and sum of all pixels as well as per-channel -histograms. - -The HGO can compute histograms independently per channel, on the maximum of the -three channels (RGB data only) or on the Y channel only (YCbCr only). It can -additionally output the histogram with 64 or 256 bins, resulting in four -possible modes of operation. - -- In *64 bins normal mode*, the HGO operates on the three channels independently - to compute three 64-bins histograms. RGB, YCbCr and HSV image formats are - supported. -- In *64 bins maximum mode*, the HGO operates on the maximum of the (R, G, B) - channels to compute a single 64-bins histogram. Only the RGB image format is - supported. -- In *256 bins normal mode*, the HGO operates on the Y channel to compute a - single 256-bins histogram. Only the YCbCr image format is supported. -- In *256 bins maximum mode*, the HGO operates on the maximum of the (R, G, B) - channels to compute a single 256-bins histogram. Only the RGB image format is - supported. - -**Byte Order.** -All data is stored in memory in little endian format. Each cell in the tables -contains one byte. - -.. flat-table:: VSP1 HGO Data - 64 Bins, Normal Mode (792 bytes) - :header-rows: 2 - :stub-columns: 0 - - * - Offset - - :cspan:`4` Memory - * - - - [31:24] - - [23:16] - - [15:8] - - [7:0] - * - 0 - - - - R/Cr/H max [7:0] - - - - R/Cr/H min [7:0] - * - 4 - - - - G/Y/S max [7:0] - - - - G/Y/S min [7:0] - * - 8 - - - - B/Cb/V max [7:0] - - - - B/Cb/V min [7:0] - * - 12 - - :cspan:`4` R/Cr/H sum [31:0] - * - 16 - - :cspan:`4` G/Y/S sum [31:0] - * - 20 - - :cspan:`4` B/Cb/V sum [31:0] - * - 24 - - :cspan:`4` R/Cr/H bin 0 [31:0] - * - - - :cspan:`4` ... - * - 276 - - :cspan:`4` R/Cr/H bin 63 [31:0] - * - 280 - - :cspan:`4` G/Y/S bin 0 [31:0] - * - - - :cspan:`4` ... - * - 532 - - :cspan:`4` G/Y/S bin 63 [31:0] - * - 536 - - :cspan:`4` B/Cb/V bin 0 [31:0] - * - - - :cspan:`4` ... - * - 788 - - :cspan:`4` B/Cb/V bin 63 [31:0] - -.. flat-table:: VSP1 HGO Data - 64 Bins, Max Mode (264 bytes) - :header-rows: 2 - :stub-columns: 0 - - * - Offset - - :cspan:`4` Memory - * - - - [31:24] - - [23:16] - - [15:8] - - [7:0] - * - 0 - - - - max(R,G,B) max [7:0] - - - - max(R,G,B) min [7:0] - * - 4 - - :cspan:`4` max(R,G,B) sum [31:0] - * - 8 - - :cspan:`4` max(R,G,B) bin 0 [31:0] - * - - - :cspan:`4` ... - * - 260 - - :cspan:`4` max(R,G,B) bin 63 [31:0] - -.. flat-table:: VSP1 HGO Data - 256 Bins, Normal Mode (1032 bytes) - :header-rows: 2 - :stub-columns: 0 - - * - Offset - - :cspan:`4` Memory - * - - - [31:24] - - [23:16] - - [15:8] - - [7:0] - * - 0 - - - - Y max [7:0] - - - - Y min [7:0] - * - 4 - - :cspan:`4` Y sum [31:0] - * - 8 - - :cspan:`4` Y bin 0 [31:0] - * - - - :cspan:`4` ... - * - 1028 - - :cspan:`4` Y bin 255 [31:0] - -.. flat-table:: VSP1 HGO Data - 256 Bins, Max Mode (1032 bytes) - :header-rows: 2 - :stub-columns: 0 - - * - Offset - - :cspan:`4` Memory - * - - - [31:24] - - [23:16] - - [15:8] - - [7:0] - * - 0 - - - - max(R,G,B) max [7:0] - - - - max(R,G,B) min [7:0] - * - 4 - - :cspan:`4` max(R,G,B) sum [31:0] - * - 8 - - :cspan:`4` max(R,G,B) bin 0 [31:0] - * - - - :cspan:`4` ... - * - 1028 - - :cspan:`4` max(R,G,B) bin 255 [31:0] diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-vsp1-hgt.rst b/Documentation/media/uapi/v4l/pixfmt-meta-vsp1-hgt.rst deleted file mode 100644 index d1a341af9c48..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-meta-vsp1-hgt.rst +++ /dev/null @@ -1,136 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-meta-fmt-vsp1-hgt: - -******************************* -V4L2_META_FMT_VSP1_HGT ('VSPT') -******************************* - -Renesas R-Car VSP1 2-D Histogram Data - - -Description -=========== - -This format describes histogram data generated by the Renesas R-Car VSP1 -2-D Histogram (HGT) engine. - -The VSP1 HGT is a histogram computation engine that operates on HSV -data. It operates on a possibly cropped and subsampled input image and -computes the sum, maximum and minimum of the S component as well as a -weighted frequency histogram based on the H and S components. - -The histogram is a matrix of 6 Hue and 32 Saturation buckets, 192 in -total. Each HSV value is added to one or more buckets with a weight -between 1 and 16 depending on the Hue areas configuration. Finding the -corresponding buckets is done by inspecting the H and S value independently. - -The Saturation position **n** (0 - 31) of the bucket in the matrix is -found by the expression: - - n = S / 8 - -The Hue position **m** (0 - 5) of the bucket in the matrix depends on -how the HGT Hue areas are configured. There are 6 user configurable Hue -Areas which can be configured to cover overlapping Hue values: - -.. raw:: latex - - \small - -:: - - Area 0 Area 1 Area 2 Area 3 Area 4 Area 5 - ________ ________ ________ ________ ________ ________ - \ /| |\ /| |\ /| |\ /| |\ /| |\ /| |\ / - \ / | | \ / | | \ / | | \ / | | \ / | | \ / | | \ / - X | | X | | X | | X | | X | | X | | X - / \ | | / \ | | / \ | | / \ | | / \ | | / \ | | / \ - / \| |/ \| |/ \| |/ \| |/ \| |/ \| |/ \ - 5U 0L 0U 1L 1U 2L 2U 3L 3U 4L 4U 5L 5U 0L - <0..............................Hue Value............................255> - - -.. raw:: latex - - \normalsize - -When two consecutive areas don't overlap (n+1L is equal to nU) the boundary -value is considered as part of the lower area. - -Pixels with a hue value included in the centre of an area (between nL and nU -included) are attributed to that single area and given a weight of 16. Pixels -with a hue value included in the overlapping region between two areas (between -n+1L and nU excluded) are attributed to both areas and given a weight for each -of these areas proportional to their position along the diagonal lines -(rounded down). - -The Hue area setup must match one of the following constrains: - -:: - - 0L <= 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U - -:: - - 0U <= 1L <= 1U <= 2L <= 2U <= 3L <= 3U <= 4L <= 4U <= 5L <= 5U <= 0L - -**Byte Order.** -All data is stored in memory in little endian format. Each cell in the tables -contains one byte. - -.. flat-table:: VSP1 HGT Data - (776 bytes) - :header-rows: 2 - :stub-columns: 0 - - * - Offset - - :cspan:`4` Memory - * - - - [31:24] - - [23:16] - - [15:8] - - [7:0] - * - 0 - - - - - S max [7:0] - - - - - S min [7:0] - * - 4 - - :cspan:`4` S sum [31:0] - * - 8 - - :cspan:`4` Histogram bucket (m=0, n=0) [31:0] - * - 12 - - :cspan:`4` Histogram bucket (m=0, n=1) [31:0] - * - - - :cspan:`4` ... - * - 132 - - :cspan:`4` Histogram bucket (m=0, n=31) [31:0] - * - 136 - - :cspan:`4` Histogram bucket (m=1, n=0) [31:0] - * - - - :cspan:`4` ... - * - 264 - - :cspan:`4` Histogram bucket (m=2, n=0) [31:0] - * - - - :cspan:`4` ... - * - 392 - - :cspan:`4` Histogram bucket (m=3, n=0) [31:0] - * - - - :cspan:`4` ... - * - 520 - - :cspan:`4` Histogram bucket (m=4, n=0) [31:0] - * - - - :cspan:`4` ... - * - 648 - - :cspan:`4` Histogram bucket (m=5, n=0) [31:0] - * - - - :cspan:`4` ... - * - 772 - - :cspan:`4` Histogram bucket (m=5, n=31) [31:0] diff --git a/Documentation/media/uapi/v4l/pixfmt-nv12.rst b/Documentation/media/uapi/v4l/pixfmt-nv12.rst deleted file mode 100644 index b8c021b07fd2..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-nv12.rst +++ /dev/null @@ -1,136 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-NV12: -.. _V4L2-PIX-FMT-NV21: - -****************************************************** -V4L2_PIX_FMT_NV12 ('NV12'), V4L2_PIX_FMT_NV21 ('NV21') -****************************************************** - - -V4L2_PIX_FMT_NV21 -Formats with ½ horizontal and vertical chroma resolution, also known as -YUV 4:2:0. One luminance and one chrominance plane with alternating -chroma samples as opposed to ``V4L2_PIX_FMT_YVU420`` - - -Description -=========== - -These are two-plane versions of the YUV 4:2:0 format. The three -components are separated into two sub-images or planes. The Y plane is -first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV12``, a -combined CbCr plane immediately follows the Y plane in memory. The CbCr -plane is the same width, in bytes, as the Y plane (and of the image), -but is half as tall in pixels. Each CbCr pair belongs to four pixels. -For example, Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, -Y'\ :sub:`01`, Y'\ :sub:`10`, Y'\ :sub:`11`. ``V4L2_PIX_FMT_NV21`` is -the same except the Cb and Cr bytes are swapped, the CrCb plane starts -with a Cr byte. - -If the Y plane has pad bytes after each row, then the CbCr plane has as -many pad bytes after its rows. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`01` - - Cr\ :sub:`01` - * - start + 20: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`11` - - Cr\ :sub:`11` - - -**Color Sample Location:** - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 1 - - Y - - - - Y - - Y - - - - Y - * - - * - 2 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 3 - - Y - - - - Y - - Y - - - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-nv12m.rst b/Documentation/media/uapi/v4l/pixfmt-nv12m.rst deleted file mode 100644 index 9b2c5c21280a..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-nv12m.rst +++ /dev/null @@ -1,151 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-NV12M: -.. _v4l2-pix-fmt-nv12mt-16x16: -.. _V4L2-PIX-FMT-NV21M: - -*********************************************************************************** -V4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16 -*********************************************************************************** - - -V4L2_PIX_FMT_NV21M -V4L2_PIX_FMT_NV12MT_16X16 -Variation of ``V4L2_PIX_FMT_NV12`` and ``V4L2_PIX_FMT_NV21`` with planes -non contiguous in memory. - - -Description -=========== - -This is a multi-planar, two-plane version of the YUV 4:2:0 format. The -three components are separated into two sub-images or planes. -``V4L2_PIX_FMT_NV12M`` differs from ``V4L2_PIX_FMT_NV12`` in that the -two planes are non-contiguous in memory, i.e. the chroma plane do not -necessarily immediately follows the luma plane. The luminance data -occupies the first plane. The Y plane has one byte per pixel. In the -second plane there is a chrominance data with alternating chroma -samples. The CbCr plane is the same width, in bytes, as the Y plane (and -of the image), but is half as tall in pixels. Each CbCr pair belongs to -four pixels. For example, Cb\ :sub:`0`/Cr\ :sub:`0` belongs to -Y'\ :sub:`00`, Y'\ :sub:`01`, Y'\ :sub:`10`, Y'\ :sub:`11`. -``V4L2_PIX_FMT_NV12MT_16X16`` is the tiled version of -``V4L2_PIX_FMT_NV12M`` with 16x16 macroblock tiles. Here pixels are -arranged in 16x16 2D tiles and tiles are arranged in linear order in -memory. ``V4L2_PIX_FMT_NV21M`` is the same as ``V4L2_PIX_FMT_NV12M`` -except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr -byte. - -``V4L2_PIX_FMT_NV12M`` is intended to be used only in drivers and -applications that support the multi-planar API, described in -:ref:`planar-apis`. - -If the Y plane has pad bytes after each row, then the CbCr plane has as -many pad bytes after its rows. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start0 + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start0 + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start0 + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start0 + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - - * - start1 + 0: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`01` - - Cr\ :sub:`01` - * - start1 + 4: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`11` - - Cr\ :sub:`11` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 1 - - Y - - - - Y - - Y - - - - Y - * - - * - 2 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - - - C - - - * - 3 - - Y - - - - Y - - Y - - - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-nv12mt.rst b/Documentation/media/uapi/v4l/pixfmt-nv12mt.rst deleted file mode 100644 index 2092725de33c..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-nv12mt.rst +++ /dev/null @@ -1,67 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-NV12MT: - -**************************** -V4L2_PIX_FMT_NV12MT ('TM12') -**************************** - -Formats with ½ horizontal and vertical chroma resolution. This format -has two planes - one for luminance and one for chrominance. Chroma -samples are interleaved. The difference to ``V4L2_PIX_FMT_NV12`` is the -memory layout. Pixels are grouped in macroblocks of 64x32 size. The -order of macroblocks in memory is also not standard. - - -Description -=========== - -This is the two-plane versions of the YUV 4:2:0 format where data is -grouped into 64x32 macroblocks. The three components are separated into -two sub-images or planes. The Y plane has one byte per pixel and pixels -are grouped into 64x32 macroblocks. The CbCr plane has the same width, -in bytes, as the Y plane (and the image), but is half as tall in pixels. -The chroma plane is also grouped into 64x32 macroblocks. - -Width of the buffer has to be aligned to the multiple of 128, and height -alignment is 32. Every four adjacent buffers - two horizontally and two -vertically are grouped together and are located in memory in Z or -flipped Z order. - -Layout of macroblocks in memory is presented in the following figure. - - -.. _nv12mt: - -.. kernel-figure:: nv12mt.svg - :alt: nv12mt.svg - :align: center - - V4L2_PIX_FMT_NV12MT macroblock Z shape memory layout - -The requirement that width is multiple of 128 is implemented because, -the Z shape cannot be cut in half horizontally. In case the vertical -resolution of macroblocks is odd then the last row of macroblocks is -arranged in a linear order. - -In case of chroma the layout is identical. Cb and Cr samples are -interleaved. Height of the buffer is aligned to 32. - - -.. _nv12mt_ex: - -.. kernel-figure:: nv12mt_example.svg - :alt: nv12mt_example.svg - :align: center - - Example V4L2_PIX_FMT_NV12MT memory layout of macroblocks - -Memory layout of macroblocks of ``V4L2_PIX_FMT_NV12MT`` format in most -extreme case. diff --git a/Documentation/media/uapi/v4l/pixfmt-nv16.rst b/Documentation/media/uapi/v4l/pixfmt-nv16.rst deleted file mode 100644 index 5ec4b7fa8f04..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-nv16.rst +++ /dev/null @@ -1,160 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-NV16: -.. _V4L2-PIX-FMT-NV61: - -****************************************************** -V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61') -****************************************************** - -V4L2_PIX_FMT_NV61 -Formats with ½ horizontal chroma resolution, also known as YUV 4:2:2. -One luminance and one chrominance plane with alternating chroma samples -as opposed to ``V4L2_PIX_FMT_YVU420`` - - -Description -=========== - -These are two-plane versions of the YUV 4:2:2 format. The three -components are separated into two sub-images or planes. The Y plane is -first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV16``, a -combined CbCr plane immediately follows the Y plane in memory. The CbCr -plane is the same width and height, in bytes, as the Y plane (and of the -image). Each CbCr pair belongs to two pixels. For example, -Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`. -``V4L2_PIX_FMT_NV61`` is the same except the Cb and Cr bytes are -swapped, the CrCb plane starts with a Cr byte. - -If the Y plane has pad bytes after each row, then the CbCr plane has as -many pad bytes after its rows. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`01` - - Cr\ :sub:`01` - * - start + 20: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`11` - - Cr\ :sub:`11` - * - start + 24: - - Cb\ :sub:`20` - - Cr\ :sub:`20` - - Cb\ :sub:`21` - - Cr\ :sub:`21` - * - start + 28: - - Cb\ :sub:`30` - - Cr\ :sub:`30` - - Cb\ :sub:`31` - - Cr\ :sub:`31` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 1 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - - * - 2 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 3 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - diff --git a/Documentation/media/uapi/v4l/pixfmt-nv16m.rst b/Documentation/media/uapi/v4l/pixfmt-nv16m.rst deleted file mode 100644 index 4a63bcf18b70..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-nv16m.rst +++ /dev/null @@ -1,164 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-NV16M: -.. _v4l2-pix-fmt-nv61m: - -******************************************************** -V4L2_PIX_FMT_NV16M ('NM16'), V4L2_PIX_FMT_NV61M ('NM61') -******************************************************** - -V4L2_PIX_FMT_NV61M -Variation of ``V4L2_PIX_FMT_NV16`` and ``V4L2_PIX_FMT_NV61`` with planes -non contiguous in memory. - - -Description -=========== - -This is a multi-planar, two-plane version of the YUV 4:2:2 format. The -three components are separated into two sub-images or planes. -``V4L2_PIX_FMT_NV16M`` differs from ``V4L2_PIX_FMT_NV16`` in that the -two planes are non-contiguous in memory, i.e. the chroma plane does not -necessarily immediately follow the luma plane. The luminance data -occupies the first plane. The Y plane has one byte per pixel. In the -second plane there is chrominance data with alternating chroma samples. -The CbCr plane is the same width and height, in bytes, as the Y plane. -Each CbCr pair belongs to two pixels. For example, -Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`. -``V4L2_PIX_FMT_NV61M`` is the same as ``V4L2_PIX_FMT_NV16M`` except the -Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte. - -``V4L2_PIX_FMT_NV16M`` and ``V4L2_PIX_FMT_NV61M`` are intended to be -used only in drivers and applications that support the multi-planar API, -described in :ref:`planar-apis`. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start0 + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start0 + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start0 + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start0 + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - - * - start1 + 0: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`02` - - Cr\ :sub:`02` - * - start1 + 4: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`12` - - Cr\ :sub:`12` - * - start1 + 8: - - Cb\ :sub:`20` - - Cr\ :sub:`20` - - Cb\ :sub:`22` - - Cr\ :sub:`22` - * - start1 + 12: - - Cb\ :sub:`30` - - Cr\ :sub:`30` - - Cb\ :sub:`32` - - Cr\ :sub:`32` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 1 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - - * - 2 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - - * - 3 - - Y - - - - Y - - Y - - - - Y - * - - - - - C - - - - - - C - - diff --git a/Documentation/media/uapi/v4l/pixfmt-nv24.rst b/Documentation/media/uapi/v4l/pixfmt-nv24.rst deleted file mode 100644 index 13fc6fe1a3d6..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-nv24.rst +++ /dev/null @@ -1,102 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-NV24: -.. _V4L2-PIX-FMT-NV42: - -****************************************************** -V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42') -****************************************************** - -V4L2_PIX_FMT_NV42 -Formats with full horizontal and vertical chroma resolutions, also known -as YUV 4:4:4. One luminance and one chrominance plane with alternating -chroma samples as opposed to ``V4L2_PIX_FMT_YVU420`` - - -Description -=========== - -These are two-plane versions of the YUV 4:4:4 format. The three -components are separated into two sub-images or planes. The Y plane is -first, with each Y sample stored in one byte per pixel. For -``V4L2_PIX_FMT_NV24``, a combined CbCr plane immediately follows the Y -plane in memory. The CbCr plane has the same width and height, in -pixels, as the Y plane (and the image). Each line contains one CbCr pair -per pixel, with each Cb and Cr sample stored in one byte. -``V4L2_PIX_FMT_NV42`` is the same except that the Cb and Cr samples are -swapped, the CrCb plane starts with a Cr sample. - -If the Y plane has pad bytes after each row, then the CbCr plane has -twice as many pad bytes after its rows. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`01` - - Cr\ :sub:`01` - - Cb\ :sub:`02` - - Cr\ :sub:`02` - - Cb\ :sub:`03` - - Cr\ :sub:`03` - * - start + 24: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`11` - - Cr\ :sub:`11` - - Cb\ :sub:`12` - - Cr\ :sub:`12` - - Cb\ :sub:`13` - - Cr\ :sub:`13` - * - start + 32: - - Cb\ :sub:`20` - - Cr\ :sub:`20` - - Cb\ :sub:`21` - - Cr\ :sub:`21` - - Cb\ :sub:`22` - - Cr\ :sub:`22` - - Cb\ :sub:`23` - - Cr\ :sub:`23` - * - start + 40: - - Cb\ :sub:`30` - - Cr\ :sub:`30` - - Cb\ :sub:`31` - - Cr\ :sub:`31` - - Cb\ :sub:`32` - - Cr\ :sub:`32` - - Cb\ :sub:`33` - - Cr\ :sub:`33` diff --git a/Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst b/Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst deleted file mode 100644 index dfc4a8367b3d..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst +++ /dev/null @@ -1,164 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _packed-hsv: - -****************** -Packed HSV formats -****************** - -Description -=========== - -The *hue* (h) is measured in degrees, the equivalence between degrees and LSBs -depends on the hsv-encoding used, see :ref:`colorspaces`. -The *saturation* (s) and the *value* (v) are measured in percentage of the -cylinder: 0 being the smallest value and 255 the maximum. - - -The values are packed in 24 or 32 bit formats. - - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{2.6cm}|p{0.8cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _packed-hsv-formats: - -.. flat-table:: Packed HSV Image Formats - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - - - :cspan:`7` Byte 0 in memory - - :cspan:`7` Byte 1 - - :cspan:`7` Byte 2 - - :cspan:`7` Byte 3 - * - - - - - Bit - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _V4L2-PIX-FMT-HSV32: - - - ``V4L2_PIX_FMT_HSV32`` - - 'HSV4' - - - - - - - - - - - - - - - - - - - - - h\ :sub:`7` - - h\ :sub:`6` - - h\ :sub:`5` - - h\ :sub:`4` - - h\ :sub:`3` - - h\ :sub:`2` - - h\ :sub:`1` - - h\ :sub:`0` - - - s\ :sub:`7` - - s\ :sub:`6` - - s\ :sub:`5` - - s\ :sub:`4` - - s\ :sub:`3` - - s\ :sub:`2` - - s\ :sub:`1` - - s\ :sub:`0` - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _V4L2-PIX-FMT-HSV24: - - - ``V4L2_PIX_FMT_HSV24`` - - 'HSV3' - - - - h\ :sub:`7` - - h\ :sub:`6` - - h\ :sub:`5` - - h\ :sub:`4` - - h\ :sub:`3` - - h\ :sub:`2` - - h\ :sub:`1` - - h\ :sub:`0` - - - s\ :sub:`7` - - s\ :sub:`6` - - s\ :sub:`5` - - s\ :sub:`4` - - s\ :sub:`3` - - s\ :sub:`2` - - s\ :sub:`1` - - s\ :sub:`0` - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - - -.. raw:: latex - - \endgroup - -Bit 7 is the most significant bit. diff --git a/Documentation/media/uapi/v4l/pixfmt-packed-yuv.rst b/Documentation/media/uapi/v4l/pixfmt-packed-yuv.rst deleted file mode 100644 index 41b60fae703a..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-packed-yuv.rst +++ /dev/null @@ -1,380 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _packed-yuv: - -****************** -Packed YUV formats -****************** - -Description -=========== - -Similar to the packed RGB formats these formats store the Y, Cb and Cr -component of each pixel in one 16 or 32 bit word. - - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. _packed-yuv-formats: - -.. tabularcolumns:: |p{2.5cm}|p{0.69cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}|p{0.31cm}| - -.. flat-table:: Packed YUV Image Formats - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - - :cspan:`7` Byte 0 in memory - - - :cspan:`7` Byte 1 - - - :cspan:`7` Byte 2 - - - :cspan:`7` Byte 3 - - * - - - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - * .. _V4L2-PIX-FMT-YUV444: - - - ``V4L2_PIX_FMT_YUV444`` - - 'Y444' - - - Cb\ :sub:`3` - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - - :cspan:`15` - - * .. _V4L2-PIX-FMT-YUV555: - - - ``V4L2_PIX_FMT_YUV555`` - - 'YUVO' - - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - - a - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - - :cspan:`15` - * .. _V4L2-PIX-FMT-YUV565: - - - ``V4L2_PIX_FMT_YUV565`` - - 'YUVP' - - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - Cb\ :sub:`5` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - - :cspan:`15` - - * .. _V4L2-PIX-FMT-YUV32: - - - ``V4L2_PIX_FMT_YUV32`` - - 'YUV4' - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - Y'\ :sub:`7` - - Y'\ :sub:`6` - - Y'\ :sub:`5` - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - - Cb\ :sub:`7` - - Cb\ :sub:`6` - - Cb\ :sub:`5` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - - Cr\ :sub:`7` - - Cr\ :sub:`6` - - Cr\ :sub:`5` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - * .. _V4L2-PIX-FMT-AYUV32: - - - ``V4L2_PIX_FMT_AYUV32`` - - 'AYUV' - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - Y'\ :sub:`7` - - Y'\ :sub:`6` - - Y'\ :sub:`5` - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - - Cb\ :sub:`7` - - Cb\ :sub:`6` - - Cb\ :sub:`5` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - - Cr\ :sub:`7` - - Cr\ :sub:`6` - - Cr\ :sub:`5` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - * .. _V4L2-PIX-FMT-XYUV32: - - - ``V4L2_PIX_FMT_XYUV32`` - - 'XYUV' - - - - - - - - - - - - - - - - - - - - Y'\ :sub:`7` - - Y'\ :sub:`6` - - Y'\ :sub:`5` - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - - Cb\ :sub:`7` - - Cb\ :sub:`6` - - Cb\ :sub:`5` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - - Cr\ :sub:`7` - - Cr\ :sub:`6` - - Cr\ :sub:`5` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - * .. _V4L2-PIX-FMT-VUYA32: - - - ``V4L2_PIX_FMT_VUYA32`` - - 'VUYA' - - - Cr\ :sub:`7` - - Cr\ :sub:`6` - - Cr\ :sub:`5` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - - Cb\ :sub:`7` - - Cb\ :sub:`6` - - Cb\ :sub:`5` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - - Y'\ :sub:`7` - - Y'\ :sub:`6` - - Y'\ :sub:`5` - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - * .. _V4L2-PIX-FMT-VUYX32: - - - ``V4L2_PIX_FMT_VUYX32`` - - 'VUYX' - - - Cr\ :sub:`7` - - Cr\ :sub:`6` - - Cr\ :sub:`5` - - Cr\ :sub:`4` - - Cr\ :sub:`3` - - Cr\ :sub:`2` - - Cr\ :sub:`1` - - Cr\ :sub:`0` - - - Cb\ :sub:`7` - - Cb\ :sub:`6` - - Cb\ :sub:`5` - - Cb\ :sub:`4` - - Cb\ :sub:`3` - - Cb\ :sub:`2` - - Cb\ :sub:`1` - - Cb\ :sub:`0` - - - Y'\ :sub:`7` - - Y'\ :sub:`6` - - Y'\ :sub:`5` - - Y'\ :sub:`4` - - Y'\ :sub:`3` - - Y'\ :sub:`2` - - Y'\ :sub:`1` - - Y'\ :sub:`0` - - - - - - - - - - - - - - - - - - -.. raw:: latex - - \endgroup - -.. note:: - - #) Bit 7 is the most significant bit; - - #) The value of a = alpha bits is undefined when reading from the driver, - ignored when writing to the driver, except when alpha blending has - been negotiated for a :ref:`Video Overlay <overlay>` or - :ref:`Video Output Overlay <osd>` for the formats Y444, YUV555 and - YUV4. However, for formats AYUV32 and VUYA32, the alpha component is - expected to contain a meaningful value that can be used by drivers - and applications. And, the formats XYUV32 and VUYX32 contain undefined - alpha values that must be ignored by all applications and drivers. diff --git a/Documentation/media/uapi/v4l/pixfmt-reserved.rst b/Documentation/media/uapi/v4l/pixfmt-reserved.rst deleted file mode 100644 index 7d98a7bf9f1f..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-reserved.rst +++ /dev/null @@ -1,282 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _pixfmt-reserved: - -*************************** -Reserved Format Identifiers -*************************** - -These formats are not defined by this specification, they are just -listed for reference and to avoid naming conflicts. If you want to -register your own format, send an e-mail to the linux-media mailing list -`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__ -for inclusion in the ``videodev2.h`` file. If you want to share your -format with other developers add a link to your documentation and send a -copy to the linux-media mailing list for inclusion in this section. If -you think your format should be listed in a standard format section -please make a proposal on the linux-media mailing list. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _reserved-formats: - -.. flat-table:: Reserved Image Formats - :header-rows: 1 - :stub-columns: 0 - :widths: 3 1 4 - - * - Identifier - - Code - - Details - * .. _V4L2-PIX-FMT-DV: - - - ``V4L2_PIX_FMT_DV`` - - 'dvsd' - - unknown - * .. _V4L2-PIX-FMT-ET61X251: - - - ``V4L2_PIX_FMT_ET61X251`` - - 'E625' - - Compressed format of the ET61X251 driver. - * .. _V4L2-PIX-FMT-HI240: - - - ``V4L2_PIX_FMT_HI240`` - - 'HI24' - - 8 bit RGB format used by the BTTV driver. - * .. _V4L2-PIX-FMT-HM12: - - - ``V4L2_PIX_FMT_HM12`` - - 'HM12' - - YUV 4:2:0 format used by the IVTV driver. - - The format is documented in the kernel sources in the file - ``Documentation/media/v4l-drivers/cx2341x.rst`` - * .. _V4L2-PIX-FMT-CPIA1: - - - ``V4L2_PIX_FMT_CPIA1`` - - 'CPIA' - - YUV format used by the gspca cpia1 driver. - * .. _V4L2-PIX-FMT-JPGL: - - - ``V4L2_PIX_FMT_JPGL`` - - 'JPGL' - - JPEG-Light format (Pegasus Lossless JPEG) used in Divio webcams NW - 80x. - * .. _V4L2-PIX-FMT-SPCA501: - - - ``V4L2_PIX_FMT_SPCA501`` - - 'S501' - - YUYV per line used by the gspca driver. - * .. _V4L2-PIX-FMT-SPCA505: - - - ``V4L2_PIX_FMT_SPCA505`` - - 'S505' - - YYUV per line used by the gspca driver. - * .. _V4L2-PIX-FMT-SPCA508: - - - ``V4L2_PIX_FMT_SPCA508`` - - 'S508' - - YUVY per line used by the gspca driver. - * .. _V4L2-PIX-FMT-SPCA561: - - - ``V4L2_PIX_FMT_SPCA561`` - - 'S561' - - Compressed GBRG Bayer format used by the gspca driver. - * .. _V4L2-PIX-FMT-PAC207: - - - ``V4L2_PIX_FMT_PAC207`` - - 'P207' - - Compressed BGGR Bayer format used by the gspca driver. - * .. _V4L2-PIX-FMT-MR97310A: - - - ``V4L2_PIX_FMT_MR97310A`` - - 'M310' - - Compressed BGGR Bayer format used by the gspca driver. - * .. _V4L2-PIX-FMT-JL2005BCD: - - - ``V4L2_PIX_FMT_JL2005BCD`` - - 'JL20' - - JPEG compressed RGGB Bayer format used by the gspca driver. - * .. _V4L2-PIX-FMT-OV511: - - - ``V4L2_PIX_FMT_OV511`` - - 'O511' - - OV511 JPEG format used by the gspca driver. - * .. _V4L2-PIX-FMT-OV518: - - - ``V4L2_PIX_FMT_OV518`` - - 'O518' - - OV518 JPEG format used by the gspca driver. - * .. _V4L2-PIX-FMT-PJPG: - - - ``V4L2_PIX_FMT_PJPG`` - - 'PJPG' - - Pixart 73xx JPEG format used by the gspca driver. - * .. _V4L2-PIX-FMT-SE401: - - - ``V4L2_PIX_FMT_SE401`` - - 'S401' - - Compressed RGB format used by the gspca se401 driver - * .. _V4L2-PIX-FMT-SQ905C: - - - ``V4L2_PIX_FMT_SQ905C`` - - '905C' - - Compressed RGGB bayer format used by the gspca driver. - * .. _V4L2-PIX-FMT-MJPEG: - - - ``V4L2_PIX_FMT_MJPEG`` - - 'MJPG' - - Compressed format used by the Zoran driver - * .. _V4L2-PIX-FMT-PWC1: - - - ``V4L2_PIX_FMT_PWC1`` - - 'PWC1' - - Compressed format of the PWC driver. - * .. _V4L2-PIX-FMT-PWC2: - - - ``V4L2_PIX_FMT_PWC2`` - - 'PWC2' - - Compressed format of the PWC driver. - * .. _V4L2-PIX-FMT-SN9C10X: - - - ``V4L2_PIX_FMT_SN9C10X`` - - 'S910' - - Compressed format of the SN9C102 driver. - * .. _V4L2-PIX-FMT-SN9C20X-I420: - - - ``V4L2_PIX_FMT_SN9C20X_I420`` - - 'S920' - - YUV 4:2:0 format of the gspca sn9c20x driver. - * .. _V4L2-PIX-FMT-SN9C2028: - - - ``V4L2_PIX_FMT_SN9C2028`` - - 'SONX' - - Compressed GBRG bayer format of the gspca sn9c2028 driver. - * .. _V4L2-PIX-FMT-STV0680: - - - ``V4L2_PIX_FMT_STV0680`` - - 'S680' - - Bayer format of the gspca stv0680 driver. - * .. _V4L2-PIX-FMT-WNVA: - - - ``V4L2_PIX_FMT_WNVA`` - - 'WNVA' - - Used by the Winnov Videum driver, - `http://www.thedirks.org/winnov/ <http://www.thedirks.org/winnov/>`__ - * .. _V4L2-PIX-FMT-TM6000: - - - ``V4L2_PIX_FMT_TM6000`` - - 'TM60' - - Used by Trident tm6000 - * .. _V4L2-PIX-FMT-CIT-YYVYUY: - - - ``V4L2_PIX_FMT_CIT_YYVYUY`` - - 'CITV' - - Used by xirlink CIT, found at IBM webcams. - - Uses one line of Y then 1 line of VYUY - * .. _V4L2-PIX-FMT-KONICA420: - - - ``V4L2_PIX_FMT_KONICA420`` - - 'KONI' - - Used by Konica webcams. - - YUV420 planar in blocks of 256 pixels. - * .. _V4L2-PIX-FMT-YYUV: - - - ``V4L2_PIX_FMT_YYUV`` - - 'YYUV' - - unknown - * .. _V4L2-PIX-FMT-Y4: - - - ``V4L2_PIX_FMT_Y4`` - - 'Y04 ' - - Old 4-bit greyscale format. Only the most significant 4 bits of - each byte are used, the other bits are set to 0. - * .. _V4L2-PIX-FMT-Y6: - - - ``V4L2_PIX_FMT_Y6`` - - 'Y06 ' - - Old 6-bit greyscale format. Only the most significant 6 bits of - each byte are used, the other bits are set to 0. - * .. _V4L2-PIX-FMT-S5C-UYVY-JPG: - - - ``V4L2_PIX_FMT_S5C_UYVY_JPG`` - - 'S5CI' - - Two-planar format used by Samsung S5C73MX cameras. The first plane - contains interleaved JPEG and UYVY image data, followed by meta - data in form of an array of offsets to the UYVY data blocks. The - actual pointer array follows immediately the interleaved JPEG/UYVY - data, the number of entries in this array equals the height of the - UYVY image. Each entry is a 4-byte unsigned integer in big endian - order and it's an offset to a single pixel line of the UYVY image. - The first plane can start either with JPEG or UYVY data chunk. The - size of a single UYVY block equals the UYVY image's width - multiplied by 2. The size of a JPEG chunk depends on the image and - can vary with each line. - - The second plane, at an offset of 4084 bytes, contains a 4-byte - offset to the pointer array in the first plane. This offset is - followed by a 4-byte value indicating size of the pointer array. - All numbers in the second plane are also in big endian order. - Remaining data in the second plane is undefined. The information - in the second plane allows to easily find location of the pointer - array, which can be different for each frame. The size of the - pointer array is constant for given UYVY image height. - - In order to extract UYVY and JPEG frames an application can - initially set a data pointer to the start of first plane and then - add an offset from the first entry of the pointers table. Such a - pointer indicates start of an UYVY image pixel line. Whole UYVY - line can be copied to a separate buffer. These steps should be - repeated for each line, i.e. the number of entries in the pointer - array. Anything what's in between the UYVY lines is JPEG data and - should be concatenated to form the JPEG stream. - * .. _V4L2-PIX-FMT-MT21C: - - - ``V4L2_PIX_FMT_MT21C`` - - 'MT21' - - Compressed two-planar YVU420 format used by Mediatek MT8173. - The compression is lossless. - It is an opaque intermediate format and the MDP hardware must be - used to convert ``V4L2_PIX_FMT_MT21C`` to ``V4L2_PIX_FMT_NV12M``, - ``V4L2_PIX_FMT_YUV420M`` or ``V4L2_PIX_FMT_YVU420``. - * .. _V4L2-PIX-FMT-SUNXI-TILED-NV12: - - - ``V4L2_PIX_FMT_SUNXI_TILED_NV12`` - - 'ST12' - - Two-planar NV12-based format used by the video engine found on Allwinner - (codenamed sunxi) platforms, with 32x32 tiles for the luminance plane - and 32x64 tiles for the chrominance plane. The data in each tile is - stored in linear order, within the tile bounds. Each tile follows the - previous one linearly in memory (from left to right, top to bottom). - - The associated buffer dimensions are aligned to match an integer number - of tiles, resulting in 32-aligned resolutions for the luminance plane - and 16-aligned resolutions for the chrominance plane (with 2x2 - subsampling). - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _format-flags: - -.. flat-table:: Format Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_PIX_FMT_FLAG_PREMUL_ALPHA`` - - 0x00000001 - - The color values are premultiplied by the alpha channel value. For - example, if a light blue pixel with 50% transparency was described - by RGBA values (128, 192, 255, 128), the same pixel described with - premultiplied colors would be described by RGBA values (64, 96, - 128, 128) diff --git a/Documentation/media/uapi/v4l/pixfmt-rgb.rst b/Documentation/media/uapi/v4l/pixfmt-rgb.rst deleted file mode 100644 index 4ce305cc45da..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-rgb.rst +++ /dev/null @@ -1,1304 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _pixfmt-rgb: - -*********** -RGB Formats -*********** - -Description -=========== - -These formats are designed to match the pixel formats of typical PC -graphics frame buffers. They occupy 8, 16, 24 or 32 bits per pixel. -These are all packed-pixel formats, meaning all the data for a pixel lie -next to each other in memory. - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{2.8cm}|p{2.0cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - - -.. flat-table:: RGB Image Formats - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - :cspan:`7` Byte 0 in memory - - :cspan:`7` Byte 1 - - :cspan:`7` Byte 2 - - :cspan:`7` Byte 3 - * - - - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _V4L2-PIX-FMT-RGB332: - - - ``V4L2_PIX_FMT_RGB332`` - - 'RGB1' - - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-ARGB444: - - - ``V4L2_PIX_FMT_ARGB444`` - - 'AR12' - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - * .. _V4L2-PIX-FMT-XRGB444: - - - ``V4L2_PIX_FMT_XRGB444`` - - 'XR12' - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - - - - - - - - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - * .. _V4L2-PIX-FMT-RGBA444: - - - ``V4L2_PIX_FMT_RGBA444`` - - 'RA12' - - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - * .. _V4L2-PIX-FMT-RGBX444: - - - ``V4L2_PIX_FMT_RGBX444`` - - 'RX12' - - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - - - - - - - - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - * .. _V4L2-PIX-FMT-ABGR444: - - - ``V4L2_PIX_FMT_ABGR444`` - - 'AB12' - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-XBGR444: - - - ``V4L2_PIX_FMT_XBGR444`` - - 'XB12' - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - - - - - - - - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-BGRA444: - - - ``V4L2_PIX_FMT_BGRA444`` - - 'BA12' - - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - * .. _V4L2-PIX-FMT-BGRX444: - - - ``V4L2_PIX_FMT_BGRX444`` - - 'BX12' - - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - - - - - - - - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - * .. _V4L2-PIX-FMT-ARGB555: - - - ``V4L2_PIX_FMT_ARGB555`` - - 'AR15' - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - a - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - * .. _V4L2-PIX-FMT-XRGB555: - - - ``V4L2_PIX_FMT_XRGB555`` - - 'XR15' - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - * .. _V4L2-PIX-FMT-RGBA555: - - - ``V4L2_PIX_FMT_RGBA555`` - - 'RA15' - - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - a - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - - * .. _V4L2-PIX-FMT-RGBX555: - - - ``V4L2_PIX_FMT_RGBX555`` - - 'RX15' - - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - - * .. _V4L2-PIX-FMT-ABGR555: - - - ``V4L2_PIX_FMT_ABGR555`` - - 'AB15' - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - a - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - * .. _V4L2-PIX-FMT-XBGR555: - - - ``V4L2_PIX_FMT_XBGR555`` - - 'XB15' - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - * .. _V4L2-PIX-FMT-BGRA555: - - - ``V4L2_PIX_FMT_BGRA555`` - - 'BA15' - - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - a - - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - - * .. _V4L2-PIX-FMT-BGRX555: - - - ``V4L2_PIX_FMT_BGRX555`` - - 'BX15' - - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - - * .. _V4L2-PIX-FMT-RGB565: - - - ``V4L2_PIX_FMT_RGB565`` - - 'RGBP' - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - - * .. _V4L2-PIX-FMT-ARGB555X: - - - ``V4L2_PIX_FMT_ARGB555X`` - - 'AR15' | (1 << 31) - - - a - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-XRGB555X: - - - ``V4L2_PIX_FMT_XRGB555X`` - - 'XR15' | (1 << 31) - - - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-RGB565X: - - - ``V4L2_PIX_FMT_RGB565X`` - - 'RGBR' - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-BGR24: - - - ``V4L2_PIX_FMT_BGR24`` - - 'BGR3' - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - * .. _V4L2-PIX-FMT-RGB24: - - - ``V4L2_PIX_FMT_RGB24`` - - 'RGB3' - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-BGR666: - - - ``V4L2_PIX_FMT_BGR666`` - - 'BGRH' - - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - - r\ :sub:`1` - - r\ :sub:`0` - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * .. _V4L2-PIX-FMT-ABGR32: - - - ``V4L2_PIX_FMT_ABGR32`` - - 'AR24' - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - * .. _V4L2-PIX-FMT-XBGR32: - - - ``V4L2_PIX_FMT_XBGR32`` - - 'XR24' - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - - - - - - - - - - - - - - - - * .. _V4L2-PIX-FMT-BGRA32: - - - ``V4L2_PIX_FMT_BGRA32`` - - 'RA24' - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _V4L2-PIX-FMT-BGRX32: - - - ``V4L2_PIX_FMT_BGRX32`` - - 'RX24' - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _V4L2-PIX-FMT-RGBA32: - - - ``V4L2_PIX_FMT_RGBA32`` - - 'AB24' - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - * .. _V4L2-PIX-FMT-RGBX32: - - - ``V4L2_PIX_FMT_RGBX32`` - - 'XB24' - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - - - - - - - - - - - - - - - - * .. _V4L2-PIX-FMT-ARGB32: - - - ``V4L2_PIX_FMT_ARGB32`` - - 'BA24' - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _V4L2-PIX-FMT-XRGB32: - - - ``V4L2_PIX_FMT_XRGB32`` - - 'BX24' - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - -.. raw:: latex - - \endgroup - -.. note:: Bit 7 is the most significant bit. - -The usage and value of the alpha bits (a) in the ARGB and ABGR formats -(collectively referred to as alpha formats) depend on the device type -and hardware operation. :ref:`Capture <capture>` devices (including -capture queues of mem-to-mem devices) fill the alpha component in -memory. When the device outputs an alpha channel the alpha component -will have a meaningful value. Otherwise, when the device doesn't output -an alpha channel but can set the alpha bit to a user-configurable value, -the :ref:`V4L2_CID_ALPHA_COMPONENT <v4l2-alpha-component>` control -is used to specify that alpha value, and the alpha component of all -pixels will be set to the value specified by that control. Otherwise a -corresponding format without an alpha component (XRGB or XBGR) must be -used instead of an alpha format. - -:ref:`Output <output>` devices (including output queues of mem-to-mem -devices and :ref:`video output overlay <osd>` devices) read the alpha -component from memory. When the device processes the alpha channel the -alpha component must be filled with meaningful values by applications. -Otherwise a corresponding format without an alpha component (XRGB or -XBGR) must be used instead of an alpha format. - -The XRGB and XBGR formats contain undefined bits (-). Applications, -devices and drivers must ignore those bits, for both -:ref:`capture` and :ref:`output` devices. - -**Byte Order.** -Each cell is one byte. - - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{3.1cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}| - -.. flat-table:: RGB byte order - :header-rows: 0 - :stub-columns: 0 - :widths: 11 3 3 3 3 3 3 3 3 3 3 3 3 - - * - start + 0: - - B\ :sub:`00` - - G\ :sub:`00` - - R\ :sub:`00` - - B\ :sub:`01` - - G\ :sub:`01` - - R\ :sub:`01` - - B\ :sub:`02` - - G\ :sub:`02` - - R\ :sub:`02` - - B\ :sub:`03` - - G\ :sub:`03` - - R\ :sub:`03` - * - start + 12: - - B\ :sub:`10` - - G\ :sub:`10` - - R\ :sub:`10` - - B\ :sub:`11` - - G\ :sub:`11` - - R\ :sub:`11` - - B\ :sub:`12` - - G\ :sub:`12` - - R\ :sub:`12` - - B\ :sub:`13` - - G\ :sub:`13` - - R\ :sub:`13` - * - start + 24: - - B\ :sub:`20` - - G\ :sub:`20` - - R\ :sub:`20` - - B\ :sub:`21` - - G\ :sub:`21` - - R\ :sub:`21` - - B\ :sub:`22` - - G\ :sub:`22` - - R\ :sub:`22` - - B\ :sub:`23` - - G\ :sub:`23` - - R\ :sub:`23` - * - start + 36: - - B\ :sub:`30` - - G\ :sub:`30` - - R\ :sub:`30` - - B\ :sub:`31` - - G\ :sub:`31` - - R\ :sub:`31` - - B\ :sub:`32` - - G\ :sub:`32` - - R\ :sub:`32` - - B\ :sub:`33` - - G\ :sub:`33` - - R\ :sub:`33` - -.. raw:: latex - - \normalsize - -Formats defined in :ref:`pixfmt-rgb-deprecated` are deprecated and -must not be used by new drivers. They are documented here for reference. -The meaning of their alpha bits ``(a)`` are ill-defined and interpreted as in -either the corresponding ARGB or XRGB format, depending on the driver. - - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{2.6cm}|p{0.70cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _pixfmt-rgb-deprecated: - -.. flat-table:: Deprecated Packed RGB Image Formats - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - :cspan:`7` Byte 0 in memory - - - :cspan:`7` Byte 1 - - - :cspan:`7` Byte 2 - - - :cspan:`7` Byte 3 - * - - - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _V4L2-PIX-FMT-RGB444: - - - ``V4L2_PIX_FMT_RGB444`` - - 'R444' - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - * .. _V4L2-PIX-FMT-RGB555: - - - ``V4L2_PIX_FMT_RGB555`` - - 'RGBO' - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - a - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - * .. _V4L2-PIX-FMT-RGB555X: - - - ``V4L2_PIX_FMT_RGB555X`` - - 'RGBQ' - - - a - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - * .. _V4L2-PIX-FMT-BGR32: - - - ``V4L2_PIX_FMT_BGR32`` - - 'BGR4' - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - * .. _V4L2-PIX-FMT-RGB32: - - - ``V4L2_PIX_FMT_RGB32`` - - 'RGB4' - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - -.. raw:: latex - - \endgroup - -A test utility to determine which RGB formats a driver actually supports -is available from the LinuxTV v4l-dvb repository. See -`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access -instructions. diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-cs08.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-cs08.rst deleted file mode 100644 index e7a89fe7e117..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-cs08.rst +++ /dev/null @@ -1,37 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-sdr-fmt-cs8: - -************************* -V4L2_SDR_FMT_CS8 ('CS08') -************************* - -Complex signed 8-bit IQ sample - - -Description -=========== - -This format contains sequence of complex number samples. Each complex -number consist two parts, called In-phase and Quadrature (IQ). Both I -and Q are represented as a 8 bit signed number. I value comes first and -Q value after that. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - I'\ :sub:`0` - * - start + 1: - - Q'\ :sub:`0` diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-cs14le.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-cs14le.rst deleted file mode 100644 index d10d56f0e63a..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-cs14le.rst +++ /dev/null @@ -1,41 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-SDR-FMT-CS14LE: - -**************************** -V4L2_SDR_FMT_CS14LE ('CS14') -**************************** - -Complex signed 14-bit little endian IQ sample - - -Description -=========== - -This format contains sequence of complex number samples. Each complex -number consist two parts, called In-phase and Quadrature (IQ). Both I -and Q are represented as a 14 bit signed little endian number. I value -comes first and Q value after that. 14 bit value is stored in 16 bit -space with unused high bits padded with 0. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - I'\ :sub:`0[7:0]` - - I'\ :sub:`0[13:8]` - * - start + 2: - - Q'\ :sub:`0[7:0]` - - Q'\ :sub:`0[13:8]` diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-cu08.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-cu08.rst deleted file mode 100644 index f37df90f5a21..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-cu08.rst +++ /dev/null @@ -1,37 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-sdr-fmt-cu8: - -************************* -V4L2_SDR_FMT_CU8 ('CU08') -************************* - -Complex unsigned 8-bit IQ sample - - -Description -=========== - -This format contains sequence of complex number samples. Each complex -number consist two parts, called In-phase and Quadrature (IQ). Both I -and Q are represented as a 8 bit unsigned number. I value comes first -and Q value after that. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - I'\ :sub:`0` - * - start + 1: - - Q'\ :sub:`0` diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-cu16le.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-cu16le.rst deleted file mode 100644 index 237998fb5f9f..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-cu16le.rst +++ /dev/null @@ -1,41 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-SDR-FMT-CU16LE: - -**************************** -V4L2_SDR_FMT_CU16LE ('CU16') -**************************** - - -Complex unsigned 16-bit little endian IQ sample - - -Description -=========== - -This format contains sequence of complex number samples. Each complex -number consist two parts, called In-phase and Quadrature (IQ). Both I -and Q are represented as a 16 bit unsigned little endian number. I value -comes first and Q value after that. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - I'\ :sub:`0[7:0]` - - I'\ :sub:`0[15:8]` - * - start + 2: - - Q'\ :sub:`0[7:0]` - - Q'\ :sub:`0[15:8]` diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst deleted file mode 100644 index df078dcfd18d..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu16be.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-SDR-FMT-PCU16BE: - -****************************** -V4L2_SDR_FMT_PCU16BE ('PC16') -****************************** - -Planar complex unsigned 16-bit big endian IQ sample - -Description -=========== - -This format contains a sequence of complex number samples. Each complex -number consist of two parts called In-phase and Quadrature (IQ). Both I -and Q are represented as a 16 bit unsigned big endian number stored in -32 bit space. The remaining unused bits within the 32 bit space will be -padded with 0. I value starts first and Q value starts at an offset -equalling half of the buffer size (i.e.) offset = buffersize/2. Out of -the 16 bits, bit 15:2 (14 bit) is data and bit 1:0 (2 bit) can be any -value. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - Offset: - - Byte B0 - - Byte B1 - - Byte B2 - - Byte B3 - * - start + 0: - - I'\ :sub:`0[13:6]` - - I'\ :sub:`0[5:0]; B1[1:0]=pad` - - pad - - pad - * - start + 4: - - I'\ :sub:`1[13:6]` - - I'\ :sub:`1[5:0]; B1[1:0]=pad` - - pad - - pad - * - ... - * - start + offset: - - Q'\ :sub:`0[13:6]` - - Q'\ :sub:`0[5:0]; B1[1:0]=pad` - - pad - - pad - * - start + offset + 4: - - Q'\ :sub:`1[13:6]` - - Q'\ :sub:`1[5:0]; B1[1:0]=pad` - - pad - - pad diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst deleted file mode 100644 index a1ea63db9230..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu18be.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-SDR-FMT-PCU18BE: - -****************************** -V4L2_SDR_FMT_PCU18BE ('PC18') -****************************** - -Planar complex unsigned 18-bit big endian IQ sample - -Description -=========== - -This format contains a sequence of complex number samples. Each complex -number consist of two parts called In-phase and Quadrature (IQ). Both I -and Q are represented as a 18 bit unsigned big endian number stored in -32 bit space. The remaining unused bits within the 32 bit space will be -padded with 0. I value starts first and Q value starts at an offset -equalling half of the buffer size (i.e.) offset = buffersize/2. Out of -the 18 bits, bit 17:2 (16 bit) is data and bit 1:0 (2 bit) can be any -value. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - Offset: - - Byte B0 - - Byte B1 - - Byte B2 - - Byte B3 - * - start + 0: - - I'\ :sub:`0[17:10]` - - I'\ :sub:`0[9:2]` - - I'\ :sub:`0[1:0]; B2[5:0]=pad` - - pad - * - start + 4: - - I'\ :sub:`1[17:10]` - - I'\ :sub:`1[9:2]` - - I'\ :sub:`1[1:0]; B2[5:0]=pad` - - pad - * - ... - * - start + offset: - - Q'\ :sub:`0[17:10]` - - Q'\ :sub:`0[9:2]` - - Q'\ :sub:`0[1:0]; B2[5:0]=pad` - - pad - * - start + offset + 4: - - Q'\ :sub:`1[17:10]` - - Q'\ :sub:`1[9:2]` - - Q'\ :sub:`1[1:0]; B2[5:0]=pad` - - pad diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst deleted file mode 100644 index 11a05ea60e26..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-SDR-FMT-PCU20BE: - -****************************** -V4L2_SDR_FMT_PCU20BE ('PC20') -****************************** - -Planar complex unsigned 20-bit big endian IQ sample - -Description -=========== - -This format contains a sequence of complex number samples. Each complex -number consist of two parts called In-phase and Quadrature (IQ). Both I -and Q are represented as a 20 bit unsigned big endian number stored in -32 bit space. The remaining unused bits within the 32 bit space will be -padded with 0. I value starts first and Q value starts at an offset -equalling half of the buffer size (i.e.) offset = buffersize/2. Out of -the 20 bits, bit 19:2 (18 bit) is data and bit 1:0 (2 bit) can be any -value. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 1 - :stub-columns: 0 - - * - Offset: - - Byte B0 - - Byte B1 - - Byte B2 - - Byte B3 - * - start + 0: - - I'\ :sub:`0[19:12]` - - I'\ :sub:`0[11:4]` - - I'\ :sub:`0[3:0]; B2[3:0]=pad` - - pad - * - start + 4: - - I'\ :sub:`1[19:12]` - - I'\ :sub:`1[11:4]` - - I'\ :sub:`1[3:0]; B2[3:0]=pad` - - pad - * - ... - * - start + offset: - - Q'\ :sub:`0[19:12]` - - Q'\ :sub:`0[11:4]` - - Q'\ :sub:`0[3:0]; B2[3:0]=pad` - - pad - * - start + offset + 4: - - Q'\ :sub:`1[19:12]` - - Q'\ :sub:`1[11:4]` - - Q'\ :sub:`1[3:0]; B2[3:0]=pad` - - pad diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-ru12le.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-ru12le.rst deleted file mode 100644 index 3c2c9f75fc5e..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-sdr-ru12le.rst +++ /dev/null @@ -1,39 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-SDR-FMT-RU12LE: - -**************************** -V4L2_SDR_FMT_RU12LE ('RU12') -**************************** - - -Real unsigned 12-bit little endian sample - - -Description -=========== - -This format contains sequence of real number samples. Each sample is -represented as a 12 bit unsigned little endian number. Sample is stored -in 16 bit space with unused high bits padded with 0. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - I'\ :sub:`0[7:0]` - - I'\ :sub:`0[11:8]` diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb10-ipu3.rst b/Documentation/media/uapi/v4l/pixfmt-srggb10-ipu3.rst deleted file mode 100644 index 75279f0fdad8..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb10-ipu3.rst +++ /dev/null @@ -1,342 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-pix-fmt-ipu3-sbggr10: -.. _v4l2-pix-fmt-ipu3-sgbrg10: -.. _v4l2-pix-fmt-ipu3-sgrbg10: -.. _v4l2-pix-fmt-ipu3-srggb10: - -********************************************************************************************************************************************** -V4L2_PIX_FMT_IPU3_SBGGR10 ('ip3b'), V4L2_PIX_FMT_IPU3_SGBRG10 ('ip3g'), V4L2_PIX_FMT_IPU3_SGRBG10 ('ip3G'), V4L2_PIX_FMT_IPU3_SRGGB10 ('ip3r') -********************************************************************************************************************************************** - -10-bit Bayer formats - -Description -=========== - -These four pixel formats are used by Intel IPU3 driver, they are raw -sRGB / Bayer formats with 10 bits per sample with every 25 pixels packed -to 32 bytes leaving 6 most significant bits padding in the last byte. -The format is little endian. - -In other respects this format is similar to :ref:`V4L2-PIX-FMT-SRGGB10`. -Below is an example of a small image in V4L2_PIX_FMT_IPU3_SBGGR10 format. - -**Byte Order.** -Each cell is one byte. - -.. tabularcolumns:: |p{0.8cm}|p{4.0cm}|p{4.0cm}|p{4.0cm}|p{4.0cm}| - -.. flat-table:: - - * - start + 0: - - B\ :sub:`0000low` - - G\ :sub:`0001low`\ (bits 7--2) - - B\ :sub:`0000high`\ (bits 1--0) - - B\ :sub:`0002low`\ (bits 7--4) - - G\ :sub:`0001high`\ (bits 3--0) - - G\ :sub:`0003low`\ (bits 7--6) - - B\ :sub:`0002high`\ (bits 5--0) - * - start + 4: - - G\ :sub:`0003high` - - B\ :sub:`0004low` - - G\ :sub:`0005low`\ (bits 7--2) - - B\ :sub:`0004high`\ (bits 1--0) - - B\ :sub:`0006low`\ (bits 7--4) - - G\ :sub:`0005high`\ (bits 3--0) - * - start + 8: - - G\ :sub:`0007low`\ (bits 7--6) - - B\ :sub:`0006high`\ (bits 5--0) - - G\ :sub:`0007high` - - B\ :sub:`0008low` - - G\ :sub:`0009low`\ (bits 7--2) - - B\ :sub:`0008high`\ (bits 1--0) - * - start + 12: - - B\ :sub:`0010low`\ (bits 7--4) - - G\ :sub:`0009high`\ (bits 3--0) - - G\ :sub:`0011low`\ (bits 7--6) - - B\ :sub:`0010high`\ (bits 5--0) - - G\ :sub:`0011high` - - B\ :sub:`0012low` - * - start + 16: - - G\ :sub:`0013low`\ (bits 7--2) - - B\ :sub:`0012high`\ (bits 1--0) - - B\ :sub:`0014low`\ (bits 7--4) - - G\ :sub:`0013high`\ (bits 3--0) - - G\ :sub:`0015low`\ (bits 7--6) - - B\ :sub:`0014high`\ (bits 5--0) - - G\ :sub:`0015high` - * - start + 20 - - B\ :sub:`0016low` - - G\ :sub:`0017low`\ (bits 7--2) - - B\ :sub:`0016high`\ (bits 1--0) - - B\ :sub:`0018low`\ (bits 7--4) - - G\ :sub:`0017high`\ (bits 3--0) - - G\ :sub:`0019low`\ (bits 7--6) - - B\ :sub:`0018high`\ (bits 5--0) - * - start + 24: - - G\ :sub:`0019high` - - B\ :sub:`0020low` - - G\ :sub:`0021low`\ (bits 7--2) - - B\ :sub:`0020high`\ (bits 1--0) - - B\ :sub:`0022low`\ (bits 7--4) - - G\ :sub:`0021high`\ (bits 3--0) - * - start + 28: - - G\ :sub:`0023low`\ (bits 7--6) - - B\ :sub:`0022high`\ (bits 5--0) - - G\ :sub:`0023high` - - B\ :sub:`0024low` - - B\ :sub:`0024high`\ (bits 1--0) - * - start + 32: - - G\ :sub:`0100low` - - R\ :sub:`0101low`\ (bits 7--2) - - G\ :sub:`0100high`\ (bits 1--0) - - G\ :sub:`0102low`\ (bits 7--4) - - R\ :sub:`0101high`\ (bits 3--0) - - R\ :sub:`0103low`\ (bits 7--6) - - G\ :sub:`0102high`\ (bits 5--0) - * - start + 36: - - R\ :sub:`0103high` - - G\ :sub:`0104low` - - R\ :sub:`0105low`\ (bits 7--2) - - G\ :sub:`0104high`\ (bits 1--0) - - G\ :sub:`0106low`\ (bits 7--4) - - R\ :sub:`0105high`\ (bits 3--0) - * - start + 40: - - R\ :sub:`0107low`\ (bits 7--6) - - G\ :sub:`0106high`\ (bits 5--0) - - R\ :sub:`0107high` - - G\ :sub:`0108low` - - R\ :sub:`0109low`\ (bits 7--2) - - G\ :sub:`0108high`\ (bits 1--0) - * - start + 44: - - G\ :sub:`0110low`\ (bits 7--4) - - R\ :sub:`0109high`\ (bits 3--0) - - R\ :sub:`0111low`\ (bits 7--6) - - G\ :sub:`0110high`\ (bits 5--0) - - R\ :sub:`0111high` - - G\ :sub:`0112low` - * - start + 48: - - R\ :sub:`0113low`\ (bits 7--2) - - G\ :sub:`0112high`\ (bits 1--0) - - G\ :sub:`0114low`\ (bits 7--4) - - R\ :sub:`0113high`\ (bits 3--0) - - R\ :sub:`0115low`\ (bits 7--6) - - G\ :sub:`0114high`\ (bits 5--0) - - R\ :sub:`0115high` - * - start + 52: - - G\ :sub:`0116low` - - R\ :sub:`0117low`\ (bits 7--2) - - G\ :sub:`0116high`\ (bits 1--0) - - G\ :sub:`0118low`\ (bits 7--4) - - R\ :sub:`0117high`\ (bits 3--0) - - R\ :sub:`0119low`\ (bits 7--6) - - G\ :sub:`0118high`\ (bits 5--0) - * - start + 56: - - R\ :sub:`0119high` - - G\ :sub:`0120low` - - R\ :sub:`0121low`\ (bits 7--2) - - G\ :sub:`0120high`\ (bits 1--0) - - G\ :sub:`0122low`\ (bits 7--4) - - R\ :sub:`0121high`\ (bits 3--0) - * - start + 60: - - R\ :sub:`0123low`\ (bits 7--6) - - G\ :sub:`0122high`\ (bits 5--0) - - R\ :sub:`0123high` - - G\ :sub:`0124low` - - G\ :sub:`0124high`\ (bits 1--0) - * - start + 64: - - B\ :sub:`0200low` - - G\ :sub:`0201low`\ (bits 7--2) - - B\ :sub:`0200high`\ (bits 1--0) - - B\ :sub:`0202low`\ (bits 7--4) - - G\ :sub:`0201high`\ (bits 3--0) - - G\ :sub:`0203low`\ (bits 7--6) - - B\ :sub:`0202high`\ (bits 5--0) - * - start + 68: - - G\ :sub:`0203high` - - B\ :sub:`0204low` - - G\ :sub:`0205low`\ (bits 7--2) - - B\ :sub:`0204high`\ (bits 1--0) - - B\ :sub:`0206low`\ (bits 7--4) - - G\ :sub:`0205high`\ (bits 3--0) - * - start + 72: - - G\ :sub:`0207low`\ (bits 7--6) - - B\ :sub:`0206high`\ (bits 5--0) - - G\ :sub:`0207high` - - B\ :sub:`0208low` - - G\ :sub:`0209low`\ (bits 7--2) - - B\ :sub:`0208high`\ (bits 1--0) - * - start + 76: - - B\ :sub:`0210low`\ (bits 7--4) - - G\ :sub:`0209high`\ (bits 3--0) - - G\ :sub:`0211low`\ (bits 7--6) - - B\ :sub:`0210high`\ (bits 5--0) - - G\ :sub:`0211high` - - B\ :sub:`0212low` - * - start + 80: - - G\ :sub:`0213low`\ (bits 7--2) - - B\ :sub:`0212high`\ (bits 1--0) - - B\ :sub:`0214low`\ (bits 7--4) - - G\ :sub:`0213high`\ (bits 3--0) - - G\ :sub:`0215low`\ (bits 7--6) - - B\ :sub:`0214high`\ (bits 5--0) - - G\ :sub:`0215high` - * - start + 84: - - B\ :sub:`0216low` - - G\ :sub:`0217low`\ (bits 7--2) - - B\ :sub:`0216high`\ (bits 1--0) - - B\ :sub:`0218low`\ (bits 7--4) - - G\ :sub:`0217high`\ (bits 3--0) - - G\ :sub:`0219low`\ (bits 7--6) - - B\ :sub:`0218high`\ (bits 5--0) - * - start + 88: - - G\ :sub:`0219high` - - B\ :sub:`0220low` - - G\ :sub:`0221low`\ (bits 7--2) - - B\ :sub:`0220high`\ (bits 1--0) - - B\ :sub:`0222low`\ (bits 7--4) - - G\ :sub:`0221high`\ (bits 3--0) - * - start + 92: - - G\ :sub:`0223low`\ (bits 7--6) - - B\ :sub:`0222high`\ (bits 5--0) - - G\ :sub:`0223high` - - B\ :sub:`0224low` - - B\ :sub:`0224high`\ (bits 1--0) - * - start + 96: - - G\ :sub:`0300low` - - R\ :sub:`0301low`\ (bits 7--2) - - G\ :sub:`0300high`\ (bits 1--0) - - G\ :sub:`0302low`\ (bits 7--4) - - R\ :sub:`0301high`\ (bits 3--0) - - R\ :sub:`0303low`\ (bits 7--6) - - G\ :sub:`0302high`\ (bits 5--0) - * - start + 100: - - R\ :sub:`0303high` - - G\ :sub:`0304low` - - R\ :sub:`0305low`\ (bits 7--2) - - G\ :sub:`0304high`\ (bits 1--0) - - G\ :sub:`0306low`\ (bits 7--4) - - R\ :sub:`0305high`\ (bits 3--0) - * - start + 104: - - R\ :sub:`0307low`\ (bits 7--6) - - G\ :sub:`0306high`\ (bits 5--0) - - R\ :sub:`0307high` - - G\ :sub:`0308low` - - R\ :sub:`0309low`\ (bits 7--2) - - G\ :sub:`0308high`\ (bits 1--0) - * - start + 108: - - G\ :sub:`0310low`\ (bits 7--4) - - R\ :sub:`0309high`\ (bits 3--0) - - R\ :sub:`0311low`\ (bits 7--6) - - G\ :sub:`0310high`\ (bits 5--0) - - R\ :sub:`0311high` - - G\ :sub:`0312low` - * - start + 112: - - R\ :sub:`0313low`\ (bits 7--2) - - G\ :sub:`0312high`\ (bits 1--0) - - G\ :sub:`0314low`\ (bits 7--4) - - R\ :sub:`0313high`\ (bits 3--0) - - R\ :sub:`0315low`\ (bits 7--6) - - G\ :sub:`0314high`\ (bits 5--0) - - R\ :sub:`0315high` - * - start + 116: - - G\ :sub:`0316low` - - R\ :sub:`0317low`\ (bits 7--2) - - G\ :sub:`0316high`\ (bits 1--0) - - G\ :sub:`0318low`\ (bits 7--4) - - R\ :sub:`0317high`\ (bits 3--0) - - R\ :sub:`0319low`\ (bits 7--6) - - G\ :sub:`0318high`\ (bits 5--0) - * - start + 120: - - R\ :sub:`0319high` - - G\ :sub:`0320low` - - R\ :sub:`0321low`\ (bits 7--2) - - G\ :sub:`0320high`\ (bits 1--0) - - G\ :sub:`0322low`\ (bits 7--4) - - R\ :sub:`0321high`\ (bits 3--0) - * - start + 124: - - R\ :sub:`0323low`\ (bits 7--6) - - G\ :sub:`0322high`\ (bits 5--0) - - R\ :sub:`0323high` - - G\ :sub:`0324low` - - G\ :sub:`0324high`\ (bits 1--0) diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb10.rst b/Documentation/media/uapi/v4l/pixfmt-srggb10.rst deleted file mode 100644 index cab7fbb1f2fe..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb10.rst +++ /dev/null @@ -1,83 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB10: -.. _v4l2-pix-fmt-sbggr10: -.. _v4l2-pix-fmt-sgbrg10: -.. _v4l2-pix-fmt-sgrbg10: - -*************************************************************************************************************************** -V4L2_PIX_FMT_SRGGB10 ('RG10'), V4L2_PIX_FMT_SGRBG10 ('BA10'), V4L2_PIX_FMT_SGBRG10 ('GB10'), V4L2_PIX_FMT_SBGGR10 ('BG10'), -*************************************************************************************************************************** - - -V4L2_PIX_FMT_SGRBG10 -V4L2_PIX_FMT_SGBRG10 -V4L2_PIX_FMT_SBGGR10 -10-bit Bayer formats expanded to 16 bits - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 10 bits per -sample. Each sample is stored in a 16-bit word, with 6 unused -high bits filled with zeros. Each n-pixel row contains n/2 green samples and -n/2 blue or red samples, with alternating red and blue rows. Bytes are -stored in memory in little endian order. They are conventionally described -as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example of one of -these formats: - -**Byte Order.** -Each cell is one byte, the 6 most significant bits in the high bytes -are 0. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - B\ :sub:`00low` - - B\ :sub:`00high` - - G\ :sub:`01low` - - G\ :sub:`01high` - - B\ :sub:`02low` - - B\ :sub:`02high` - - G\ :sub:`03low` - - G\ :sub:`03high` - * - start + 8: - - G\ :sub:`10low` - - G\ :sub:`10high` - - R\ :sub:`11low` - - R\ :sub:`11high` - - G\ :sub:`12low` - - G\ :sub:`12high` - - R\ :sub:`13low` - - R\ :sub:`13high` - * - start + 16: - - B\ :sub:`20low` - - B\ :sub:`20high` - - G\ :sub:`21low` - - G\ :sub:`21high` - - B\ :sub:`22low` - - B\ :sub:`22high` - - G\ :sub:`23low` - - G\ :sub:`23high` - * - start + 24: - - G\ :sub:`30low` - - G\ :sub:`30high` - - R\ :sub:`31low` - - R\ :sub:`31high` - - G\ :sub:`32low` - - G\ :sub:`32high` - - R\ :sub:`33low` - - R\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb10alaw8.rst b/Documentation/media/uapi/v4l/pixfmt-srggb10alaw8.rst deleted file mode 100644 index 5bb58764b532..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb10alaw8.rst +++ /dev/null @@ -1,31 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SBGGR10ALAW8: -.. _v4l2-pix-fmt-sgbrg10alaw8: -.. _v4l2-pix-fmt-sgrbg10alaw8: -.. _v4l2-pix-fmt-srggb10alaw8: - -*********************************************************************************************************************************************** -V4L2_PIX_FMT_SBGGR10ALAW8 ('aBA8'), V4L2_PIX_FMT_SGBRG10ALAW8 ('aGA8'), V4L2_PIX_FMT_SGRBG10ALAW8 ('agA8'), V4L2_PIX_FMT_SRGGB10ALAW8 ('aRA8'), -*********************************************************************************************************************************************** - -V4L2_PIX_FMT_SGBRG10ALAW8 -V4L2_PIX_FMT_SGRBG10ALAW8 -V4L2_PIX_FMT_SRGGB10ALAW8 -10-bit Bayer formats compressed to 8 bits - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 10 bits per -color compressed to 8 bits each, using the A-LAW algorithm. Each color -component consumes 8 bits of memory. In other respects this format is -similar to :ref:`V4L2-PIX-FMT-SRGGB8`. diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb10dpcm8.rst b/Documentation/media/uapi/v4l/pixfmt-srggb10dpcm8.rst deleted file mode 100644 index cbc9c0a52ab4..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb10dpcm8.rst +++ /dev/null @@ -1,35 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SBGGR10DPCM8: -.. _v4l2-pix-fmt-sgbrg10dpcm8: -.. _v4l2-pix-fmt-sgrbg10dpcm8: -.. _v4l2-pix-fmt-srggb10dpcm8: - - -*********************************************************************************************************************************************** -V4L2_PIX_FMT_SBGGR10DPCM8 ('bBA8'), V4L2_PIX_FMT_SGBRG10DPCM8 ('bGA8'), V4L2_PIX_FMT_SGRBG10DPCM8 ('BD10'), V4L2_PIX_FMT_SRGGB10DPCM8 ('bRA8'), -*********************************************************************************************************************************************** - -*man V4L2_PIX_FMT_SBGGR10DPCM8(2)* - -V4L2_PIX_FMT_SGBRG10DPCM8 -V4L2_PIX_FMT_SGRBG10DPCM8 -V4L2_PIX_FMT_SRGGB10DPCM8 -10-bit Bayer formats compressed to 8 bits - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 10 bits per -colour compressed to 8 bits each, using DPCM compression. DPCM, -differential pulse-code modulation, is lossy. Each colour component -consumes 8 bits of memory. In other respects this format is similar to -:ref:`V4L2-PIX-FMT-SRGGB10`. diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb10p.rst b/Documentation/media/uapi/v4l/pixfmt-srggb10p.rst deleted file mode 100644 index fd32660a3766..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb10p.rst +++ /dev/null @@ -1,81 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB10P: -.. _v4l2-pix-fmt-sbggr10p: -.. _v4l2-pix-fmt-sgbrg10p: -.. _v4l2-pix-fmt-sgrbg10p: - -******************************************************************************************************************************* -V4L2_PIX_FMT_SRGGB10P ('pRAA'), V4L2_PIX_FMT_SGRBG10P ('pgAA'), V4L2_PIX_FMT_SGBRG10P ('pGAA'), V4L2_PIX_FMT_SBGGR10P ('pBAA'), -******************************************************************************************************************************* - - -V4L2_PIX_FMT_SGRBG10P -V4L2_PIX_FMT_SGBRG10P -V4L2_PIX_FMT_SBGGR10P -10-bit packed Bayer formats - - -Description -=========== - -These four pixel formats are packed raw sRGB / Bayer formats with 10 -bits per sample. Every four consecutive samples are packed into 5 -bytes. Each of the first 4 bytes contain the 8 high order bits -of the pixels, and the 5th byte contains the 2 least significants -bits of each pixel, in the same order. - -Each n-pixel row contains n/2 green samples and n/2 blue or red samples, -with alternating green-red and green-blue rows. They are conventionally -described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example -of a small V4L2_PIX_FMT_SBGGR10P image: - -**Byte Order.** -Each cell is one byte. - -.. tabularcolumns:: |p{2.4cm}|p{1.4cm}|p{1.2cm}|p{1.2cm}|p{1.2cm}|p{6.4cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 12 8 8 8 8 68 - - * - start + 0: - - B\ :sub:`00high` - - G\ :sub:`01high` - - B\ :sub:`02high` - - G\ :sub:`03high` - - G\ :sub:`03low`\ (bits 7--6) B\ :sub:`02low`\ (bits 5--4) - - G\ :sub:`01low`\ (bits 3--2) B\ :sub:`00low`\ (bits 1--0) - * - start + 5: - - G\ :sub:`10high` - - R\ :sub:`11high` - - G\ :sub:`12high` - - R\ :sub:`13high` - - R\ :sub:`13low`\ (bits 7--6) G\ :sub:`12low`\ (bits 5--4) - - R\ :sub:`11low`\ (bits 3--2) G\ :sub:`10low`\ (bits 1--0) - * - start + 10: - - B\ :sub:`20high` - - G\ :sub:`21high` - - B\ :sub:`22high` - - G\ :sub:`23high` - - G\ :sub:`23low`\ (bits 7--6) B\ :sub:`22low`\ (bits 5--4) - - G\ :sub:`21low`\ (bits 3--2) B\ :sub:`20low`\ (bits 1--0) - * - start + 15: - - G\ :sub:`30high` - - R\ :sub:`31high` - - G\ :sub:`32high` - - R\ :sub:`33high` - - R\ :sub:`33low`\ (bits 7--6) G\ :sub:`32low`\ (bits 5--4) - - R\ :sub:`31low`\ (bits 3--2) G\ :sub:`30low`\ (bits 1--0) diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb12.rst b/Documentation/media/uapi/v4l/pixfmt-srggb12.rst deleted file mode 100644 index 6fb6a937e6ad..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb12.rst +++ /dev/null @@ -1,84 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB12: -.. _v4l2-pix-fmt-sbggr12: -.. _v4l2-pix-fmt-sgbrg12: -.. _v4l2-pix-fmt-sgrbg12: - - -*************************************************************************************************************************** -V4L2_PIX_FMT_SRGGB12 ('RG12'), V4L2_PIX_FMT_SGRBG12 ('BA12'), V4L2_PIX_FMT_SGBRG12 ('GB12'), V4L2_PIX_FMT_SBGGR12 ('BG12'), -*************************************************************************************************************************** - - -V4L2_PIX_FMT_SGRBG12 -V4L2_PIX_FMT_SGBRG12 -V4L2_PIX_FMT_SBGGR12 -12-bit Bayer formats expanded to 16 bits - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 12 bits per -colour. Each colour component is stored in a 16-bit word, with 4 unused -high bits filled with zeros. Each n-pixel row contains n/2 green samples -and n/2 blue or red samples, with alternating red and blue rows. Bytes -are stored in memory in little endian order. They are conventionally -described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example -of a small V4L2_PIX_FMT_SBGGR12 image: - -**Byte Order.** -Each cell is one byte, the 4 most significant bits in the high bytes are -0. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - B\ :sub:`00low` - - B\ :sub:`00high` - - G\ :sub:`01low` - - G\ :sub:`01high` - - B\ :sub:`02low` - - B\ :sub:`02high` - - G\ :sub:`03low` - - G\ :sub:`03high` - * - start + 8: - - G\ :sub:`10low` - - G\ :sub:`10high` - - R\ :sub:`11low` - - R\ :sub:`11high` - - G\ :sub:`12low` - - G\ :sub:`12high` - - R\ :sub:`13low` - - R\ :sub:`13high` - * - start + 16: - - B\ :sub:`20low` - - B\ :sub:`20high` - - G\ :sub:`21low` - - G\ :sub:`21high` - - B\ :sub:`22low` - - B\ :sub:`22high` - - G\ :sub:`23low` - - G\ :sub:`23high` - * - start + 24: - - G\ :sub:`30low` - - G\ :sub:`30high` - - R\ :sub:`31low` - - R\ :sub:`31high` - - G\ :sub:`32low` - - G\ :sub:`32high` - - R\ :sub:`33low` - - R\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb12p.rst b/Documentation/media/uapi/v4l/pixfmt-srggb12p.rst deleted file mode 100644 index 045540bc0d86..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb12p.rst +++ /dev/null @@ -1,94 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB12P: -.. _v4l2-pix-fmt-sbggr12p: -.. _v4l2-pix-fmt-sgbrg12p: -.. _v4l2-pix-fmt-sgrbg12p: - -******************************************************************************************************************************* -V4L2_PIX_FMT_SRGGB12P ('pRCC'), V4L2_PIX_FMT_SGRBG12P ('pgCC'), V4L2_PIX_FMT_SGBRG12P ('pGCC'), V4L2_PIX_FMT_SBGGR12P ('pBCC'), -******************************************************************************************************************************* - - -12-bit packed Bayer formats ---------------------------- - - -Description -=========== - -These four pixel formats are packed raw sRGB / Bayer formats with 12 -bits per colour. Every two consecutive samples are packed into three -bytes. Each of the first two bytes contain the 8 high order bits of -the pixels, and the third byte contains the four least significants -bits of each pixel, in the same order. - -Each n-pixel row contains n/2 green samples and n/2 blue or red -samples, with alternating green-red and green-blue rows. They are -conventionally described as GRGR... BGBG..., RGRG... GBGB..., etc. -Below is an example of a small V4L2_PIX_FMT_SBGGR12P image: - -**Byte Order.** -Each cell is one byte. - -.. tabularcolumns:: |p{2.2cm}|p{1.2cm}|p{1.2cm}|p{3.1cm}|p{1.2cm}|p{1.2cm}|p{3.1cm}| - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 1 1 - - - - - start + 0: - - B\ :sub:`00high` - - G\ :sub:`01high` - - G\ :sub:`01low`\ (bits 7--4) - - B\ :sub:`00low`\ (bits 3--0) - - B\ :sub:`02high` - - G\ :sub:`03high` - - G\ :sub:`03low`\ (bits 7--4) - - B\ :sub:`02low`\ (bits 3--0) - - - - start + 6: - - G\ :sub:`10high` - - R\ :sub:`11high` - - R\ :sub:`11low`\ (bits 7--4) - - G\ :sub:`10low`\ (bits 3--0) - - G\ :sub:`12high` - - R\ :sub:`13high` - - R\ :sub:`13low`\ (bits 3--2) - - G\ :sub:`12low`\ (bits 3--0) - - - start + 12: - - B\ :sub:`20high` - - G\ :sub:`21high` - - G\ :sub:`21low`\ (bits 7--4) - - B\ :sub:`20low`\ (bits 3--0) - - B\ :sub:`22high` - - G\ :sub:`23high` - - G\ :sub:`23low`\ (bits 7--4) - - B\ :sub:`22low`\ (bits 3--0) - - - start + 18: - - G\ :sub:`30high` - - R\ :sub:`31high` - - R\ :sub:`31low`\ (bits 7--4) - - G\ :sub:`30low`\ (bits 3--0) - - G\ :sub:`32high` - - R\ :sub:`33high` - - R\ :sub:`33low`\ (bits 3--2) - - G\ :sub:`32low`\ (bits 3--0) diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb14.rst b/Documentation/media/uapi/v4l/pixfmt-srggb14.rst deleted file mode 100644 index 3420d4d1825e..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb14.rst +++ /dev/null @@ -1,82 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB14: -.. _v4l2-pix-fmt-sbggr14: -.. _v4l2-pix-fmt-sgbrg14: -.. _v4l2-pix-fmt-sgrbg14: - - -*************************************************************************************************************************** -V4L2_PIX_FMT_SRGGB14 ('RG14'), V4L2_PIX_FMT_SGRBG14 ('GR14'), V4L2_PIX_FMT_SGBRG14 ('GB14'), V4L2_PIX_FMT_SBGGR14 ('BG14'), -*************************************************************************************************************************** - - -14-bit Bayer formats expanded to 16 bits - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 14 bits per -colour. Each sample is stored in a 16-bit word, with two unused high -bits filled with zeros. Each n-pixel row contains n/2 green samples -and n/2 blue or red samples, with alternating red and blue rows. Bytes -are stored in memory in little endian order. They are conventionally -described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an -example of a small V4L2_PIX_FMT_SBGGR14 image: - -**Byte Order.** -Each cell is one byte, the two most significant bits in the high bytes are -zero. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 1 1 1 1 - - - * - start + 0: - - B\ :sub:`00low` - - B\ :sub:`00high` - - G\ :sub:`01low` - - G\ :sub:`01high` - - B\ :sub:`02low` - - B\ :sub:`02high` - - G\ :sub:`03low` - - G\ :sub:`03high` - * - start + 8: - - G\ :sub:`10low` - - G\ :sub:`10high` - - R\ :sub:`11low` - - R\ :sub:`11high` - - G\ :sub:`12low` - - G\ :sub:`12high` - - R\ :sub:`13low` - - R\ :sub:`13high` - * - start + 16: - - B\ :sub:`20low` - - B\ :sub:`20high` - - G\ :sub:`21low` - - G\ :sub:`21high` - - B\ :sub:`22low` - - B\ :sub:`22high` - - G\ :sub:`23low` - - G\ :sub:`23high` - * - start + 24: - - G\ :sub:`30low` - - G\ :sub:`30high` - - R\ :sub:`31low` - - R\ :sub:`31high` - - G\ :sub:`32low` - - G\ :sub:`32high` - - R\ :sub:`33low` - - R\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb14p.rst b/Documentation/media/uapi/v4l/pixfmt-srggb14p.rst deleted file mode 100644 index 051ae3d05bc3..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb14p.rst +++ /dev/null @@ -1,152 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB14P: -.. _v4l2-pix-fmt-sbggr14p: -.. _v4l2-pix-fmt-sgbrg14p: -.. _v4l2-pix-fmt-sgrbg14p: - -******************************************************************************************************************************* -V4L2_PIX_FMT_SRGGB14P ('pREE'), V4L2_PIX_FMT_SGRBG14P ('pgEE'), V4L2_PIX_FMT_SGBRG14P ('pGEE'), V4L2_PIX_FMT_SBGGR14P ('pBEE'), -******************************************************************************************************************************* - -*man V4L2_PIX_FMT_SRGGB14P(2)* - -V4L2_PIX_FMT_SGRBG14P -V4L2_PIX_FMT_SGBRG14P -V4L2_PIX_FMT_SBGGR14P -14-bit packed Bayer formats - - -Description -=========== - -These four pixel formats are packed raw sRGB / Bayer formats with 14 -bits per colour. Every four consecutive samples are packed into seven -bytes. Each of the first four bytes contain the eight high order bits -of the pixels, and the three following bytes contains the six least -significants bits of each pixel, in the same order. - -Each n-pixel row contains n/2 green samples and n/2 blue or red samples, -with alternating green-red and green-blue rows. They are conventionally -described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example -of one of these formats: - -**Byte Order.** -Each cell is one byte. - -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{1.8cm}|p{1.0cm}|p{1.0cm}|p{1.0cm}|p{1.1cm}|p{3.3cm}|p{3.3cm}|p{3.3cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 3 3 3 - - - - .. row 1 - - - start + 0 - - - B\ :sub:`00high` - - - G\ :sub:`01high` - - - B\ :sub:`02high` - - - G\ :sub:`03high` - - - G\ :sub:`01low bits 1--0`\ (bits 7--6) - - B\ :sub:`00low bits 5--0`\ (bits 5--0) - - - R\ :sub:`02low bits 3--0`\ (bits 7--4) - - G\ :sub:`01low bits 5--2`\ (bits 3--0) - - - G\ :sub:`03low bits 5--0`\ (bits 7--2) - - R\ :sub:`02low bits 5--4`\ (bits 1--0) - - - .. row 2 - - - start + 7 - - - G\ :sub:`00high` - - - R\ :sub:`01high` - - - G\ :sub:`02high` - - - R\ :sub:`03high` - - - R\ :sub:`01low bits 1--0`\ (bits 7--6) - - G\ :sub:`00low bits 5--0`\ (bits 5--0) - - - G\ :sub:`02low bits 3--0`\ (bits 7--4) - - R\ :sub:`01low bits 5--2`\ (bits 3--0) - - - R\ :sub:`03low bits 5--0`\ (bits 7--2) - - G\ :sub:`02low bits 5--4`\ (bits 1--0) - - - .. row 3 - - - start + 14 - - - B\ :sub:`20high` - - - G\ :sub:`21high` - - - B\ :sub:`22high` - - - G\ :sub:`23high` - - - G\ :sub:`21low bits 1--0`\ (bits 7--6) - - B\ :sub:`20low bits 5--0`\ (bits 5--0) - - - R\ :sub:`22low bits 3--0`\ (bits 7--4) - - G\ :sub:`21low bits 5--2`\ (bits 3--0) - - - G\ :sub:`23low bits 5--0`\ (bits 7--2) - - R\ :sub:`22low bits 5--4`\ (bits 1--0) - - - .. row 4 - - - start + 21 - - - G\ :sub:`30high` - - - R\ :sub:`31high` - - - G\ :sub:`32high` - - - R\ :sub:`33high` - - - R\ :sub:`31low bits 1--0`\ (bits 7--6) - G\ :sub:`30low bits 5--0`\ (bits 5--0) - - - G\ :sub:`32low bits 3--0`\ (bits 7--4) - R\ :sub:`31low bits 5--2`\ (bits 3--0) - - - R\ :sub:`33low bits 5--0`\ (bits 7--2) - G\ :sub:`32low bits 5--4`\ (bits 1--0) - -.. raw:: latex - - \normalsize - diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb16.rst b/Documentation/media/uapi/v4l/pixfmt-srggb16.rst deleted file mode 100644 index 36527c49eaf7..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb16.rst +++ /dev/null @@ -1,76 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB16: -.. _v4l2-pix-fmt-sbggr16: -.. _v4l2-pix-fmt-sgbrg16: -.. _v4l2-pix-fmt-sgrbg16: - - -*************************************************************************************************************************** -V4L2_PIX_FMT_SRGGB16 ('RG16'), V4L2_PIX_FMT_SGRBG16 ('GR16'), V4L2_PIX_FMT_SGBRG16 ('GB16'), V4L2_PIX_FMT_SBGGR16 ('BYR2'), -*************************************************************************************************************************** - - -16-bit Bayer formats - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 16 bits per -sample. Each sample is stored in a 16-bit word. Each n-pixel row contains -n/2 green samples and n/2 blue or red samples, with alternating red and blue -rows. Bytes are stored in memory in little endian order. They are -conventionally described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is -an example of a small V4L2_PIX_FMT_SBGGR16 image: - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - B\ :sub:`00low` - - B\ :sub:`00high` - - G\ :sub:`01low` - - G\ :sub:`01high` - - B\ :sub:`02low` - - B\ :sub:`02high` - - G\ :sub:`03low` - - G\ :sub:`03high` - * - start + 8: - - G\ :sub:`10low` - - G\ :sub:`10high` - - R\ :sub:`11low` - - R\ :sub:`11high` - - G\ :sub:`12low` - - G\ :sub:`12high` - - R\ :sub:`13low` - - R\ :sub:`13high` - * - start + 16: - - B\ :sub:`20low` - - B\ :sub:`20high` - - G\ :sub:`21low` - - G\ :sub:`21high` - - B\ :sub:`22low` - - B\ :sub:`22high` - - G\ :sub:`23low` - - G\ :sub:`23high` - * - start + 24: - - G\ :sub:`30low` - - G\ :sub:`30high` - - R\ :sub:`31low` - - R\ :sub:`31high` - - G\ :sub:`32low` - - G\ :sub:`32high` - - R\ :sub:`33low` - - R\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-srggb8.rst b/Documentation/media/uapi/v4l/pixfmt-srggb8.rst deleted file mode 100644 index f5233c1e2314..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-srggb8.rst +++ /dev/null @@ -1,61 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-SRGGB8: -.. _v4l2-pix-fmt-sbggr8: -.. _v4l2-pix-fmt-sgbrg8: -.. _v4l2-pix-fmt-sgrbg8: - -*************************************************************************************************************************** -V4L2_PIX_FMT_SRGGB8 ('RGGB'), V4L2_PIX_FMT_SGRBG8 ('GRBG'), V4L2_PIX_FMT_SGBRG8 ('GBRG'), V4L2_PIX_FMT_SBGGR8 ('BA81'), -*************************************************************************************************************************** - - -8-bit Bayer formats - - -Description -=========== - -These four pixel formats are raw sRGB / Bayer formats with 8 bits per -sample. Each sample is stored in a byte. Each n-pixel row contains n/2 -green samples and n/2 blue or red samples, with alternating red and -blue rows. They are conventionally described as GRGR... BGBG..., -RGRG... GBGB..., etc. Below is an example of a small V4L2_PIX_FMT_SBGGR8 image: - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - B\ :sub:`00` - - G\ :sub:`01` - - B\ :sub:`02` - - G\ :sub:`03` - * - start + 4: - - G\ :sub:`10` - - R\ :sub:`11` - - G\ :sub:`12` - - R\ :sub:`13` - * - start + 8: - - B\ :sub:`20` - - G\ :sub:`21` - - B\ :sub:`22` - - G\ :sub:`23` - * - start + 12: - - G\ :sub:`30` - - R\ :sub:`31` - - G\ :sub:`32` - - R\ :sub:`33` diff --git a/Documentation/media/uapi/v4l/pixfmt-tch-td08.rst b/Documentation/media/uapi/v4l/pixfmt-tch-td08.rst deleted file mode 100644 index b7d3d6ccebc5..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-tch-td08.rst +++ /dev/null @@ -1,59 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-TCH-FMT-DELTA-TD08: - -******************************** -V4L2_TCH_FMT_DELTA_TD08 ('TD08') -******************************** - -*man V4L2_TCH_FMT_DELTA_TD08(2)* - -8-bit signed Touch Delta - -Description -=========== - -This format represents delta data from a touch controller. - -Delta values may range from -128 to 127. Typically the values will vary through -a small range depending on whether the sensor is touched or not. The full value -may be seen if one of the touchscreen nodes has a fault or the line is not -connected. - -**Byte Order.** -Each cell is one byte. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 - - * - start + 0: - - D'\ :sub:`00` - - D'\ :sub:`01` - - D'\ :sub:`02` - - D'\ :sub:`03` - * - start + 4: - - D'\ :sub:`10` - - D'\ :sub:`11` - - D'\ :sub:`12` - - D'\ :sub:`13` - * - start + 8: - - D'\ :sub:`20` - - D'\ :sub:`21` - - D'\ :sub:`22` - - D'\ :sub:`23` - * - start + 12: - - D'\ :sub:`30` - - D'\ :sub:`31` - - D'\ :sub:`32` - - D'\ :sub:`33` diff --git a/Documentation/media/uapi/v4l/pixfmt-tch-td16.rst b/Documentation/media/uapi/v4l/pixfmt-tch-td16.rst deleted file mode 100644 index 6f1be873bec1..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-tch-td16.rst +++ /dev/null @@ -1,74 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-TCH-FMT-DELTA-TD16: - -******************************** -V4L2_TCH_FMT_DELTA_TD16 ('TD16') -******************************** - -*man V4L2_TCH_FMT_DELTA_TD16(2)* - -16-bit signed little endian Touch Delta - - -Description -=========== - -This format represents delta data from a touch controller. - -Delta values may range from -32768 to 32767. Typically the values will vary -through a small range depending on whether the sensor is touched or not. The -full value may be seen if one of the touchscreen nodes has a fault or the line -is not connected. - -**Byte Order.** -Each cell is one byte. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 1 1 1 1 - - * - start + 0: - - D'\ :sub:`00low` - - D'\ :sub:`00high` - - D'\ :sub:`01low` - - D'\ :sub:`01high` - - D'\ :sub:`02low` - - D'\ :sub:`02high` - - D'\ :sub:`03low` - - D'\ :sub:`03high` - * - start + 8: - - D'\ :sub:`10low` - - D'\ :sub:`10high` - - D'\ :sub:`11low` - - D'\ :sub:`11high` - - D'\ :sub:`12low` - - D'\ :sub:`12high` - - D'\ :sub:`13low` - - D'\ :sub:`13high` - * - start + 16: - - D'\ :sub:`20low` - - D'\ :sub:`20high` - - D'\ :sub:`21low` - - D'\ :sub:`21high` - - D'\ :sub:`22low` - - D'\ :sub:`22high` - - D'\ :sub:`23low` - - D'\ :sub:`23high` - * - start + 24: - - D'\ :sub:`30low` - - D'\ :sub:`30high` - - D'\ :sub:`31low` - - D'\ :sub:`31high` - - D'\ :sub:`32low` - - D'\ :sub:`32high` - - D'\ :sub:`33low` - - D'\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-tch-tu08.rst b/Documentation/media/uapi/v4l/pixfmt-tch-tu08.rst deleted file mode 100644 index 2d447475aaa7..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-tch-tu08.rst +++ /dev/null @@ -1,57 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-TCH-FMT-TU08: - -************************** -V4L2_TCH_FMT_TU08 ('TU08') -************************** - -*man V4L2_TCH_FMT_TU08(2)* - -8-bit unsigned raw touch data - -Description -=========== - -This format represents unsigned 8-bit data from a touch controller. - -This may be used for output for raw and reference data. Values may range from -0 to 255. - -**Byte Order.** -Each cell is one byte. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 - - * - start + 0: - - R'\ :sub:`00` - - R'\ :sub:`01` - - R'\ :sub:`02` - - R'\ :sub:`03` - * - start + 4: - - R'\ :sub:`10` - - R'\ :sub:`11` - - R'\ :sub:`12` - - R'\ :sub:`13` - * - start + 8: - - R'\ :sub:`20` - - R'\ :sub:`21` - - R'\ :sub:`22` - - R'\ :sub:`23` - * - start + 12: - - R'\ :sub:`30` - - R'\ :sub:`31` - - R'\ :sub:`32` - - R'\ :sub:`33` diff --git a/Documentation/media/uapi/v4l/pixfmt-tch-tu16.rst b/Documentation/media/uapi/v4l/pixfmt-tch-tu16.rst deleted file mode 100644 index cb3da6687a58..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-tch-tu16.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-TCH-FMT-TU16: - -******************************** -V4L2_TCH_FMT_TU16 ('TU16') -******************************** - -*man V4L2_TCH_FMT_TU16(2)* - -16-bit unsigned little endian raw touch data - - -Description -=========== - -This format represents unsigned 16-bit data from a touch controller. - -This may be used for output for raw and reference data. Values may range from -0 to 65535. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 2 1 1 1 1 1 1 1 1 - - * - start + 0: - - R'\ :sub:`00low` - - R'\ :sub:`00high` - - R'\ :sub:`01low` - - R'\ :sub:`01high` - - R'\ :sub:`02low` - - R'\ :sub:`02high` - - R'\ :sub:`03low` - - R'\ :sub:`03high` - * - start + 8: - - R'\ :sub:`10low` - - R'\ :sub:`10high` - - R'\ :sub:`11low` - - R'\ :sub:`11high` - - R'\ :sub:`12low` - - R'\ :sub:`12high` - - R'\ :sub:`13low` - - R'\ :sub:`13high` - * - start + 16: - - R'\ :sub:`20low` - - R'\ :sub:`20high` - - R'\ :sub:`21low` - - R'\ :sub:`21high` - - R'\ :sub:`22low` - - R'\ :sub:`22high` - - R'\ :sub:`23low` - - R'\ :sub:`23high` - * - start + 24: - - R'\ :sub:`30low` - - R'\ :sub:`30high` - - R'\ :sub:`31low` - - R'\ :sub:`31high` - - R'\ :sub:`32low` - - R'\ :sub:`32high` - - R'\ :sub:`33low` - - R'\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-uv8.rst b/Documentation/media/uapi/v4l/pixfmt-uv8.rst deleted file mode 100644 index 6008c898305d..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-uv8.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-UV8: - -************************ -V4L2_PIX_FMT_UV8 ('UV8') -************************ - - -UV plane interleaved - - -Description -=========== - -In this format there is no Y plane, Only CbCr plane. ie (UV interleaved) - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Cb\ :sub:`00` - - Cr\ :sub:`00` - - Cb\ :sub:`01` - - Cr\ :sub:`01` - * - start + 4: - - Cb\ :sub:`10` - - Cr\ :sub:`10` - - Cb\ :sub:`11` - - Cr\ :sub:`11` - * - start + 8: - - Cb\ :sub:`20` - - Cr\ :sub:`20` - - Cb\ :sub:`21` - - Cr\ :sub:`21` - * - start + 12: - - Cb\ :sub:`30` - - Cr\ :sub:`30` - - Cb\ :sub:`31` - - Cr\ :sub:`31` diff --git a/Documentation/media/uapi/v4l/pixfmt-uyvy.rst b/Documentation/media/uapi/v4l/pixfmt-uyvy.rst deleted file mode 100644 index 72da2639d37e..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-uyvy.rst +++ /dev/null @@ -1,117 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-UYVY: - -************************** -V4L2_PIX_FMT_UYVY ('UYVY') -************************** - - -Variation of ``V4L2_PIX_FMT_YUYV`` with different order of samples in -memory - - -Description -=========== - -In this format each four bytes is two pixels. Each four bytes is two -Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr -belong to both pixels. As you can see, the Cr and Cb components have -half the horizontal resolution of the Y component. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Cb\ :sub:`00` - - Y'\ :sub:`00` - - Cr\ :sub:`00` - - Y'\ :sub:`01` - - Cb\ :sub:`01` - - Y'\ :sub:`02` - - Cr\ :sub:`01` - - Y'\ :sub:`03` - * - start + 8: - - Cb\ :sub:`10` - - Y'\ :sub:`10` - - Cr\ :sub:`10` - - Y'\ :sub:`11` - - Cb\ :sub:`11` - - Y'\ :sub:`12` - - Cr\ :sub:`11` - - Y'\ :sub:`13` - * - start + 16: - - Cb\ :sub:`20` - - Y'\ :sub:`20` - - Cr\ :sub:`20` - - Y'\ :sub:`21` - - Cb\ :sub:`21` - - Y'\ :sub:`22` - - Cr\ :sub:`21` - - Y'\ :sub:`23` - * - start + 24: - - Cb\ :sub:`30` - - Y'\ :sub:`30` - - Cr\ :sub:`30` - - Y'\ :sub:`31` - - Cb\ :sub:`31` - - Y'\ :sub:`32` - - Cr\ :sub:`31` - - Y'\ :sub:`33` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - C - - Y - - Y - - C - - Y - * - 1 - - Y - - C - - Y - - Y - - C - - Y - * - 2 - - Y - - C - - Y - - Y - - C - - Y - * - 3 - - Y - - C - - Y - - Y - - C - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-v4l2-mplane.rst b/Documentation/media/uapi/v4l/pixfmt-v4l2-mplane.rst deleted file mode 100644 index 054275c0dfc1..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-v4l2-mplane.rst +++ /dev/null @@ -1,138 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -****************************** -Multi-planar format structures -****************************** - -The struct :c:type:`v4l2_plane_pix_format` structures define size -and layout for each of the planes in a multi-planar format. The -struct :c:type:`v4l2_pix_format_mplane` structure contains -information common to all planes (such as image width and height) and an -array of struct :c:type:`v4l2_plane_pix_format` structures, -describing all planes of that format. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_plane_pix_format - -.. flat-table:: struct v4l2_plane_pix_format - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``sizeimage`` - - Maximum size in bytes required for image data in this plane, - set by the driver. When the image consists of variable length - compressed data this is the number of bytes required by the - codec to support the worst-case compression scenario. - - The driver will set the value for uncompressed images. - - Clients are allowed to set the sizeimage field for variable length - compressed data flagged with ``V4L2_FMT_FLAG_COMPRESSED`` at - :ref:`VIDIOC_ENUM_FMT`, but the driver may ignore it and set the - value itself, or it may modify the provided value based on - alignment requirements or minimum/maximum size requirements. - If the client wants to leave this to the driver, then it should - set sizeimage to 0. - * - __u32 - - ``bytesperline`` - - Distance in bytes between the leftmost pixels in two adjacent - lines. See struct :c:type:`v4l2_pix_format`. - * - __u16 - - ``reserved[6]`` - - Reserved for future extensions. Should be zeroed by drivers and - applications. - - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{4.4cm}|p{5.6cm}|p{7.5cm}| - -.. c:type:: v4l2_pix_format_mplane - -.. flat-table:: struct v4l2_pix_format_mplane - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``width`` - - Image width in pixels. See struct - :c:type:`v4l2_pix_format`. - * - __u32 - - ``height`` - - Image height in pixels. See struct - :c:type:`v4l2_pix_format`. - * - __u32 - - ``pixelformat`` - - The pixel format. Both single- and multi-planar four character - codes can be used. - * - __u32 - - ``field`` - - Field order, from enum :c:type:`v4l2_field`. - See struct :c:type:`v4l2_pix_format`. - * - __u32 - - ``colorspace`` - - Colorspace encoding, from enum :c:type:`v4l2_colorspace`. - See struct :c:type:`v4l2_pix_format`. - * - struct :c:type:`v4l2_plane_pix_format` - - ``plane_fmt[VIDEO_MAX_PLANES]`` - - An array of structures describing format of each plane this pixel - format consists of. The number of valid entries in this array has - to be put in the ``num_planes`` field. - * - __u8 - - ``num_planes`` - - Number of planes (i.e. separate memory buffers) for this format - and the number of valid entries in the ``plane_fmt`` array. - * - __u8 - - ``flags`` - - Flags set by the application or driver, see :ref:`format-flags`. - * - union { - - (anonymous) - * - __u8 - - ``ycbcr_enc`` - - Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u8 - - ``hsv_enc`` - - HSV encoding, from enum :c:type:`v4l2_hsv_encoding`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - } - - - * - __u8 - - ``quantization`` - - Quantization range, from enum :c:type:`v4l2_quantization`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u8 - - ``xfer_func`` - - Transfer function, from enum :c:type:`v4l2_xfer_func`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u8 - - ``reserved[7]`` - - Reserved for future extensions. Should be zeroed by drivers and - applications. - -.. raw:: latex - - \normalsize diff --git a/Documentation/media/uapi/v4l/pixfmt-v4l2.rst b/Documentation/media/uapi/v4l/pixfmt-v4l2.rst deleted file mode 100644 index a993b861bf75..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-v4l2.rst +++ /dev/null @@ -1,171 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -****************************** -Single-planar format structure -****************************** - -.. tabularcolumns:: |p{4.0cm}|p{2.5cm}|p{11.0cm}| - -.. c:type:: v4l2_pix_format - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_pix_format - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``width`` - - Image width in pixels. - * - __u32 - - ``height`` - - Image height in pixels. If ``field`` is one of ``V4L2_FIELD_TOP``, - ``V4L2_FIELD_BOTTOM`` or ``V4L2_FIELD_ALTERNATE`` then height - refers to the number of lines in the field, otherwise it refers to - the number of lines in the frame (which is twice the field height - for interlaced formats). - * - :cspan:`2` Applications set these fields to request an image - size, drivers return the closest possible values. In case of - planar formats the ``width`` and ``height`` applies to the largest - plane. To avoid ambiguities drivers must return values rounded up - to a multiple of the scale factor of any smaller planes. For - example when the image format is YUV 4:2:0, ``width`` and - ``height`` must be multiples of two. - - For compressed formats that contain the resolution information encoded - inside the stream, when fed to a stateful mem2mem decoder, the fields - may be zero to rely on the decoder to detect the right values. For more - details see :ref:`decoder` and format descriptions. - * - __u32 - - ``pixelformat`` - - The pixel format or type of compression, set by the application. - This is a little endian - :ref:`four character code <v4l2-fourcc>`. V4L2 defines standard - RGB formats in :ref:`pixfmt-rgb`, YUV formats in - :ref:`yuv-formats`, and reserved codes in - :ref:`reserved-formats` - * - __u32 - - ``field`` - - Field order, from enum :c:type:`v4l2_field`. - Video images are typically interlaced. Applications can request to - capture or output only the top or bottom field, or both fields - interlaced or sequentially stored in one buffer or alternating in - separate buffers. Drivers return the actual field order selected. - For more details on fields see :ref:`field-order`. - * - __u32 - - ``bytesperline`` - - Distance in bytes between the leftmost pixels in two adjacent - lines. - * - :cspan:`2` - - Both applications and drivers can set this field to request - padding bytes at the end of each line. Drivers however may ignore - the value requested by the application, returning ``width`` times - bytes per pixel or a larger value required by the hardware. That - implies applications can just set this field to zero to get a - reasonable default. - - Video hardware may access padding bytes, therefore they must - reside in accessible memory. Consider cases where padding bytes - after the last line of an image cross a system page boundary. - Input devices may write padding bytes, the value is undefined. - Output devices ignore the contents of padding bytes. - - When the image format is planar the ``bytesperline`` value applies - to the first plane and is divided by the same factor as the - ``width`` field for the other planes. For example the Cb and Cr - planes of a YUV 4:2:0 image have half as many padding bytes - following each line as the Y plane. To avoid ambiguities drivers - must return a ``bytesperline`` value rounded up to a multiple of - the scale factor. - - For compressed formats the ``bytesperline`` value makes no sense. - Applications and drivers must set this to 0 in that case. - * - __u32 - - ``sizeimage`` - - Size in bytes of the buffer to hold a complete image, set by the - driver. Usually this is ``bytesperline`` times ``height``. When - the image consists of variable length compressed data this is the - number of bytes required by the codec to support the worst-case - compression scenario. - - The driver will set the value for uncompressed images. - - Clients are allowed to set the sizeimage field for variable length - compressed data flagged with ``V4L2_FMT_FLAG_COMPRESSED`` at - :ref:`VIDIOC_ENUM_FMT`, but the driver may ignore it and set the - value itself, or it may modify the provided value based on - alignment requirements or minimum/maximum size requirements. - If the client wants to leave this to the driver, then it should - set sizeimage to 0. - * - __u32 - - ``colorspace`` - - Image colorspace, from enum :c:type:`v4l2_colorspace`. - This information supplements the ``pixelformat`` and must be set - by the driver for capture streams and by the application for - output streams, see :ref:`colorspaces`. - * - __u32 - - ``priv`` - - This field indicates whether the remaining fields of the - struct :c:type:`v4l2_pix_format`, also called the - extended fields, are valid. When set to - ``V4L2_PIX_FMT_PRIV_MAGIC``, it indicates that the extended fields - have been correctly initialized. When set to any other value it - indicates that the extended fields contain undefined values. - - Applications that wish to use the pixel format extended fields - must first ensure that the feature is supported by querying the - device for the :ref:`V4L2_CAP_EXT_PIX_FORMAT <querycap>` - capability. If the capability isn't set the pixel format extended - fields are not supported and using the extended fields will lead - to undefined results. - - To use the extended fields, applications must set the ``priv`` - field to ``V4L2_PIX_FMT_PRIV_MAGIC``, initialize all the extended - fields and zero the unused bytes of the - struct :c:type:`v4l2_format` ``raw_data`` field. - - When the ``priv`` field isn't set to ``V4L2_PIX_FMT_PRIV_MAGIC`` - drivers must act as if all the extended fields were set to zero. - On return drivers must set the ``priv`` field to - ``V4L2_PIX_FMT_PRIV_MAGIC`` and all the extended fields to - applicable values. - * - __u32 - - ``flags`` - - Flags set by the application or driver, see :ref:`format-flags`. - * - union { - - (anonymous) - * - __u32 - - ``ycbcr_enc`` - - Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u32 - - ``hsv_enc`` - - HSV encoding, from enum :c:type:`v4l2_hsv_encoding`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - } - - - * - __u32 - - ``quantization`` - - Quantization range, from enum :c:type:`v4l2_quantization`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u32 - - ``xfer_func`` - - Transfer function, from enum :c:type:`v4l2_xfer_func`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. diff --git a/Documentation/media/uapi/v4l/pixfmt-vyuy.rst b/Documentation/media/uapi/v4l/pixfmt-vyuy.rst deleted file mode 100644 index 39b99707cd99..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-vyuy.rst +++ /dev/null @@ -1,115 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-VYUY: - -************************** -V4L2_PIX_FMT_VYUY ('VYUY') -************************** - - -Variation of ``V4L2_PIX_FMT_YUYV`` with different order of samples in -memory - - -Description -=========== - -In this format each four bytes is two pixels. Each four bytes is two -Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr -belong to both pixels. As you can see, the Cr and Cb components have -half the horizontal resolution of the Y component. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Cr\ :sub:`00` - - Y'\ :sub:`00` - - Cb\ :sub:`00` - - Y'\ :sub:`01` - - Cr\ :sub:`01` - - Y'\ :sub:`02` - - Cb\ :sub:`01` - - Y'\ :sub:`03` - * - start + 8: - - Cr\ :sub:`10` - - Y'\ :sub:`10` - - Cb\ :sub:`10` - - Y'\ :sub:`11` - - Cr\ :sub:`11` - - Y'\ :sub:`12` - - Cb\ :sub:`11` - - Y'\ :sub:`13` - * - start + 16: - - Cr\ :sub:`20` - - Y'\ :sub:`20` - - Cb\ :sub:`20` - - Y'\ :sub:`21` - - Cr\ :sub:`21` - - Y'\ :sub:`22` - - Cb\ :sub:`21` - - Y'\ :sub:`23` - * - start + 24: - - Cr\ :sub:`30` - - Y'\ :sub:`30` - - Cb\ :sub:`30` - - Y'\ :sub:`31` - - Cr\ :sub:`31` - - Y'\ :sub:`32` - - Cb\ :sub:`31` - - Y'\ :sub:`33` - - -**Color Sample Location:** - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - - - 2 - - 3 - * - 0 - - Y - - C - - Y - - Y - - C - - Y - * - 1 - - Y - - C - - Y - - Y - - C - - Y - * - 2 - - Y - - C - - Y - - Y - - C - - Y - * - 3 - - Y - - C - - Y - - Y - - C - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-y10.rst b/Documentation/media/uapi/v4l/pixfmt-y10.rst deleted file mode 100644 index 63277686764a..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y10.rst +++ /dev/null @@ -1,72 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y10: - -************************* -V4L2_PIX_FMT_Y10 ('Y10 ') -************************* - - -Grey-scale image - - -Description -=========== - -This is a grey-scale image with a depth of 10 bits per pixel. Pixels are -stored in 16-bit words with unused high bits padded with 0. The least -significant byte is stored at lower memory addresses (little-endian). - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00low` - - Y'\ :sub:`00high` - - Y'\ :sub:`01low` - - Y'\ :sub:`01high` - - Y'\ :sub:`02low` - - Y'\ :sub:`02high` - - Y'\ :sub:`03low` - - Y'\ :sub:`03high` - * - start + 8: - - Y'\ :sub:`10low` - - Y'\ :sub:`10high` - - Y'\ :sub:`11low` - - Y'\ :sub:`11high` - - Y'\ :sub:`12low` - - Y'\ :sub:`12high` - - Y'\ :sub:`13low` - - Y'\ :sub:`13high` - * - start + 16: - - Y'\ :sub:`20low` - - Y'\ :sub:`20high` - - Y'\ :sub:`21low` - - Y'\ :sub:`21high` - - Y'\ :sub:`22low` - - Y'\ :sub:`22high` - - Y'\ :sub:`23low` - - Y'\ :sub:`23high` - * - start + 24: - - Y'\ :sub:`30low` - - Y'\ :sub:`30high` - - Y'\ :sub:`31low` - - Y'\ :sub:`31high` - - Y'\ :sub:`32low` - - Y'\ :sub:`32high` - - Y'\ :sub:`33low` - - Y'\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-y10b.rst b/Documentation/media/uapi/v4l/pixfmt-y10b.rst deleted file mode 100644 index 49c4dd432413..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y10b.rst +++ /dev/null @@ -1,40 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y10BPACK: - -****************************** -V4L2_PIX_FMT_Y10BPACK ('Y10B') -****************************** - -Grey-scale image as a bit-packed array - - -Description -=========== - -This is a packed grey-scale image format with a depth of 10 bits per -pixel. Pixels are stored in a bit-packed array of 10bit bits per pixel, -with no padding between them and with the most significant bits coming -first from the left. - -**Bit-packed representation.** - -pixels cross the byte boundary and have a ratio of 5 bytes for each 4 -pixels. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - Y'\ :sub:`00[9:2]` - - Y'\ :sub:`00[1:0]`\ Y'\ :sub:`01[9:4]` - - Y'\ :sub:`01[3:0]`\ Y'\ :sub:`02[9:6]` - - Y'\ :sub:`02[5:0]`\ Y'\ :sub:`03[9:8]` - - Y'\ :sub:`03[7:0]` diff --git a/Documentation/media/uapi/v4l/pixfmt-y10p.rst b/Documentation/media/uapi/v4l/pixfmt-y10p.rst deleted file mode 100644 index 39cd789dcb59..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y10p.rst +++ /dev/null @@ -1,50 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y10P: - -****************************** -V4L2_PIX_FMT_Y10P ('Y10P') -****************************** - -Grey-scale image as a MIPI RAW10 packed array - - -Description -=========== - -This is a packed grey-scale image format with a depth of 10 bits per -pixel. Every four consecutive pixels are packed into 5 bytes. Each of -the first 4 bytes contain the 8 high order bits of the pixels, and -the 5th byte contains the 2 least significants bits of each pixel, -in the same order. - -**Bit-packed representation.** - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{1.2cm}||p{1.2cm}||p{1.2cm}||p{1.2cm}|p{3.2cm}|p{3.2cm}| - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 8 8 8 8 64 - - * - Y'\ :sub:`00[9:2]` - - Y'\ :sub:`01[9:2]` - - Y'\ :sub:`02[9:2]` - - Y'\ :sub:`03[9:2]` - - Y'\ :sub:`03[1:0]`\ (bits 7--6) Y'\ :sub:`02[1:0]`\ (bits 5--4) - Y'\ :sub:`01[1:0]`\ (bits 3--2) Y'\ :sub:`00[1:0]`\ (bits 1--0) - -.. raw:: latex - - \normalsize diff --git a/Documentation/media/uapi/v4l/pixfmt-y12.rst b/Documentation/media/uapi/v4l/pixfmt-y12.rst deleted file mode 100644 index 33a943b4996a..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y12.rst +++ /dev/null @@ -1,72 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y12: - -************************* -V4L2_PIX_FMT_Y12 ('Y12 ') -************************* - - -Grey-scale image - - -Description -=========== - -This is a grey-scale image with a depth of 12 bits per pixel. Pixels are -stored in 16-bit words with unused high bits padded with 0. The least -significant byte is stored at lower memory addresses (little-endian). - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00low` - - Y'\ :sub:`00high` - - Y'\ :sub:`01low` - - Y'\ :sub:`01high` - - Y'\ :sub:`02low` - - Y'\ :sub:`02high` - - Y'\ :sub:`03low` - - Y'\ :sub:`03high` - * - start + 8: - - Y'\ :sub:`10low` - - Y'\ :sub:`10high` - - Y'\ :sub:`11low` - - Y'\ :sub:`11high` - - Y'\ :sub:`12low` - - Y'\ :sub:`12high` - - Y'\ :sub:`13low` - - Y'\ :sub:`13high` - * - start + 16: - - Y'\ :sub:`20low` - - Y'\ :sub:`20high` - - Y'\ :sub:`21low` - - Y'\ :sub:`21high` - - Y'\ :sub:`22low` - - Y'\ :sub:`22high` - - Y'\ :sub:`23low` - - Y'\ :sub:`23high` - * - start + 24: - - Y'\ :sub:`30low` - - Y'\ :sub:`30high` - - Y'\ :sub:`31low` - - Y'\ :sub:`31high` - - Y'\ :sub:`32low` - - Y'\ :sub:`32high` - - Y'\ :sub:`33low` - - Y'\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-y12i.rst b/Documentation/media/uapi/v4l/pixfmt-y12i.rst deleted file mode 100644 index 1d4a14e1ec6e..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y12i.rst +++ /dev/null @@ -1,43 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y12I: - -************************** -V4L2_PIX_FMT_Y12I ('Y12I') -************************** - -Interleaved grey-scale image, e.g. from a stereo-pair - - -Description -=========== - -This is a grey-scale image with a depth of 12 bits per pixel, but with -pixels from 2 sources interleaved and bit-packed. Each pixel is stored -in a 24-bit word in the little-endian order. On a little-endian machine -these pixels can be deinterlaced using - -.. code-block:: c - - __u8 *buf; - left0 = 0xfff & *(__u16 *)buf; - right0 = *(__u16 *)(buf + 1) >> 4; - -**Bit-packed representation.** -pixels cross the byte boundary and have a ratio of 3 bytes for each -interleaved pixel. - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - Y'\ :sub:`0left[7:0]` - - Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]` - - Y'\ :sub:`0right[11:4]` diff --git a/Documentation/media/uapi/v4l/pixfmt-y14.rst b/Documentation/media/uapi/v4l/pixfmt-y14.rst deleted file mode 100644 index 5c260f8da088..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y14.rst +++ /dev/null @@ -1,72 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y14: - -************************* -V4L2_PIX_FMT_Y14 ('Y14 ') -************************* - - -Grey-scale image - - -Description -=========== - -This is a grey-scale image with a depth of 14 bits per pixel. Pixels are -stored in 16-bit words with unused high bits padded with 0. The least -significant byte is stored at lower memory addresses (little-endian). - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00low` - - Y'\ :sub:`00high` - - Y'\ :sub:`01low` - - Y'\ :sub:`01high` - - Y'\ :sub:`02low` - - Y'\ :sub:`02high` - - Y'\ :sub:`03low` - - Y'\ :sub:`03high` - * - start + 8: - - Y'\ :sub:`10low` - - Y'\ :sub:`10high` - - Y'\ :sub:`11low` - - Y'\ :sub:`11high` - - Y'\ :sub:`12low` - - Y'\ :sub:`12high` - - Y'\ :sub:`13low` - - Y'\ :sub:`13high` - * - start + 16: - - Y'\ :sub:`20low` - - Y'\ :sub:`20high` - - Y'\ :sub:`21low` - - Y'\ :sub:`21high` - - Y'\ :sub:`22low` - - Y'\ :sub:`22high` - - Y'\ :sub:`23low` - - Y'\ :sub:`23high` - * - start + 24: - - Y'\ :sub:`30low` - - Y'\ :sub:`30high` - - Y'\ :sub:`31low` - - Y'\ :sub:`31high` - - Y'\ :sub:`32low` - - Y'\ :sub:`32high` - - Y'\ :sub:`33low` - - Y'\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-y16-be.rst b/Documentation/media/uapi/v4l/pixfmt-y16-be.rst deleted file mode 100644 index 1e72bfe2d557..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y16-be.rst +++ /dev/null @@ -1,76 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y16-BE: - -**************************************** -V4L2_PIX_FMT_Y16_BE ('Y16 ' | (1 << 31)) -**************************************** - - -Grey-scale image - - -Description -=========== - -This is a grey-scale image with a depth of 16 bits per pixel. The most -significant byte is stored at lower memory addresses (big-endian). - -.. note:: - - The actual sampling precision may be lower than 16 bits, for - example 10 bits per pixel with values in range 0 to 1023. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00high` - - Y'\ :sub:`00low` - - Y'\ :sub:`01high` - - Y'\ :sub:`01low` - - Y'\ :sub:`02high` - - Y'\ :sub:`02low` - - Y'\ :sub:`03high` - - Y'\ :sub:`03low` - * - start + 8: - - Y'\ :sub:`10high` - - Y'\ :sub:`10low` - - Y'\ :sub:`11high` - - Y'\ :sub:`11low` - - Y'\ :sub:`12high` - - Y'\ :sub:`12low` - - Y'\ :sub:`13high` - - Y'\ :sub:`13low` - * - start + 16: - - Y'\ :sub:`20high` - - Y'\ :sub:`20low` - - Y'\ :sub:`21high` - - Y'\ :sub:`21low` - - Y'\ :sub:`22high` - - Y'\ :sub:`22low` - - Y'\ :sub:`23high` - - Y'\ :sub:`23low` - * - start + 24: - - Y'\ :sub:`30high` - - Y'\ :sub:`30low` - - Y'\ :sub:`31high` - - Y'\ :sub:`31low` - - Y'\ :sub:`32high` - - Y'\ :sub:`32low` - - Y'\ :sub:`33high` - - Y'\ :sub:`33low` diff --git a/Documentation/media/uapi/v4l/pixfmt-y16.rst b/Documentation/media/uapi/v4l/pixfmt-y16.rst deleted file mode 100644 index f77d900db131..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y16.rst +++ /dev/null @@ -1,76 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y16: - -************************* -V4L2_PIX_FMT_Y16 ('Y16 ') -************************* - - -Grey-scale image - - -Description -=========== - -This is a grey-scale image with a depth of 16 bits per pixel. The least -significant byte is stored at lower memory addresses (little-endian). - -.. note:: - - The actual sampling precision may be lower than 16 bits, for - example 10 bits per pixel with values in range 0 to 1023. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00low` - - Y'\ :sub:`00high` - - Y'\ :sub:`01low` - - Y'\ :sub:`01high` - - Y'\ :sub:`02low` - - Y'\ :sub:`02high` - - Y'\ :sub:`03low` - - Y'\ :sub:`03high` - * - start + 8: - - Y'\ :sub:`10low` - - Y'\ :sub:`10high` - - Y'\ :sub:`11low` - - Y'\ :sub:`11high` - - Y'\ :sub:`12low` - - Y'\ :sub:`12high` - - Y'\ :sub:`13low` - - Y'\ :sub:`13high` - * - start + 16: - - Y'\ :sub:`20low` - - Y'\ :sub:`20high` - - Y'\ :sub:`21low` - - Y'\ :sub:`21high` - - Y'\ :sub:`22low` - - Y'\ :sub:`22high` - - Y'\ :sub:`23low` - - Y'\ :sub:`23high` - * - start + 24: - - Y'\ :sub:`30low` - - Y'\ :sub:`30high` - - Y'\ :sub:`31low` - - Y'\ :sub:`31high` - - Y'\ :sub:`32low` - - Y'\ :sub:`32high` - - Y'\ :sub:`33low` - - Y'\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt-y41p.rst b/Documentation/media/uapi/v4l/pixfmt-y41p.rst deleted file mode 100644 index 829c68afd8d7..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y41p.rst +++ /dev/null @@ -1,158 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y41P: - -************************** -V4L2_PIX_FMT_Y41P ('Y41P') -************************** - - -Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1 - - -Description -=========== - -In this format each 12 bytes is eight pixels. In the twelve bytes are -two CbCr pairs and eight Y's. The first CbCr pair goes with the first -four Y's, and the second CbCr pair goes with the other four Y's. The Cb -and Cr components have one fourth the horizontal resolution of the Y -component. - -Do not confuse this format with -:ref:`V4L2_PIX_FMT_YUV411P <V4L2-PIX-FMT-YUV411P>`. Y41P is derived -from "YUV 4:1:1 *packed*", while YUV411P stands for "YUV 4:1:1 -*planar*". - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Cb\ :sub:`00` - - Y'\ :sub:`00` - - Cr\ :sub:`00` - - Y'\ :sub:`01` - - Cb\ :sub:`01` - - Y'\ :sub:`02` - - Cr\ :sub:`01` - - Y'\ :sub:`03` - - Y'\ :sub:`04` - - Y'\ :sub:`05` - - Y'\ :sub:`06` - - Y'\ :sub:`07` - * - start + 12: - - Cb\ :sub:`10` - - Y'\ :sub:`10` - - Cr\ :sub:`10` - - Y'\ :sub:`11` - - Cb\ :sub:`11` - - Y'\ :sub:`12` - - Cr\ :sub:`11` - - Y'\ :sub:`13` - - Y'\ :sub:`14` - - Y'\ :sub:`15` - - Y'\ :sub:`16` - - Y'\ :sub:`17` - * - start + 24: - - Cb\ :sub:`20` - - Y'\ :sub:`20` - - Cr\ :sub:`20` - - Y'\ :sub:`21` - - Cb\ :sub:`21` - - Y'\ :sub:`22` - - Cr\ :sub:`21` - - Y'\ :sub:`23` - - Y'\ :sub:`24` - - Y'\ :sub:`25` - - Y'\ :sub:`26` - - Y'\ :sub:`27` - * - start + 36: - - Cb\ :sub:`30` - - Y'\ :sub:`30` - - Cr\ :sub:`30` - - Y'\ :sub:`31` - - Cb\ :sub:`31` - - Y'\ :sub:`32` - - Cr\ :sub:`31` - - Y'\ :sub:`33` - - Y'\ :sub:`34` - - Y'\ :sub:`35` - - Y'\ :sub:`36` - - Y'\ :sub:`37` - - -**Color Sample Location:** - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - 1 - - - - 2 - - 3 - - 4 - - 5 - - - - 6 - - 7 - * - 0 - - Y - - Y - - C - - Y - - Y - - Y - - Y - - C - - Y - - Y - * - 1 - - Y - - Y - - C - - Y - - Y - - Y - - Y - - C - - Y - - Y - * - 2 - - Y - - Y - - C - - Y - - Y - - Y - - Y - - C - - Y - - Y - * - 3 - - Y - - Y - - C - - Y - - Y - - Y - - Y - - C - - Y - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-y8i.rst b/Documentation/media/uapi/v4l/pixfmt-y8i.rst deleted file mode 100644 index 2c88ed90522d..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-y8i.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Y8I: - -************************* -V4L2_PIX_FMT_Y8I ('Y8I ') -************************* - - -Interleaved grey-scale image, e.g. from a stereo-pair - - -Description -=========== - -This is a grey-scale image with a depth of 8 bits per pixel, but with -pixels from 2 sources interleaved. Each pixel is stored in a 16-bit -word. E.g. the R200 RealSense camera stores pixel from the left sensor -in lower and from the right sensor in the higher 8 bits. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00left` - - Y'\ :sub:`00right` - - Y'\ :sub:`01left` - - Y'\ :sub:`01right` - - Y'\ :sub:`02left` - - Y'\ :sub:`02right` - - Y'\ :sub:`03left` - - Y'\ :sub:`03right` - * - start + 8: - - Y'\ :sub:`10left` - - Y'\ :sub:`10right` - - Y'\ :sub:`11left` - - Y'\ :sub:`11right` - - Y'\ :sub:`12left` - - Y'\ :sub:`12right` - - Y'\ :sub:`13left` - - Y'\ :sub:`13right` - * - start + 16: - - Y'\ :sub:`20left` - - Y'\ :sub:`20right` - - Y'\ :sub:`21left` - - Y'\ :sub:`21right` - - Y'\ :sub:`22left` - - Y'\ :sub:`22right` - - Y'\ :sub:`23left` - - Y'\ :sub:`23right` - * - start + 24: - - Y'\ :sub:`30left` - - Y'\ :sub:`30right` - - Y'\ :sub:`31left` - - Y'\ :sub:`31right` - - Y'\ :sub:`32left` - - Y'\ :sub:`32right` - - Y'\ :sub:`33left` - - Y'\ :sub:`33right` diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv410.rst b/Documentation/media/uapi/v4l/pixfmt-yuv410.rst deleted file mode 100644 index ebb72a5c7ceb..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv410.rst +++ /dev/null @@ -1,134 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YVU410: -.. _v4l2-pix-fmt-yuv410: - -********************************************************** -V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9') -********************************************************** - - -V4L2_PIX_FMT_YUV410 -Planar formats with ¼ horizontal and vertical chroma resolution, also -known as YUV 4:1:0 - - -Description -=========== - -These are planar formats, as opposed to a packed format. The three -components are separated into three sub-images or planes. The Y plane is -first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_YVU410``, -the Cr plane immediately follows the Y plane in memory. The Cr plane is -¼ the width and ¼ the height of the Y plane (and of the image). Each Cr -belongs to 16 pixels, a four-by-four square of the image. Following the -Cr plane is the Cb plane, just like the Cr plane. -``V4L2_PIX_FMT_YUV410`` is the same, except the Cb plane comes first, -then the Cr plane. - -If the Y plane has pad bytes after each row, then the Cr and Cb planes -have ¼ as many pad bytes after their rows. In other words, four Cx rows -(including padding) are exactly as long as one Y row (including -padding). - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cr\ :sub:`00` - * - start + 17: - - Cb\ :sub:`00` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - - - Y - - - - Y - * - - * - 1 - - Y - - - - Y - - - - Y - - - - Y - * - - - - - - - - - C - - - - - - - * - 2 - - Y - - - - Y - - - - Y - - - - Y - * - - * - 3 - - Y - - - - Y - - - - Y - - - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv411p.rst b/Documentation/media/uapi/v4l/pixfmt-yuv411p.rst deleted file mode 100644 index 83ddaa3f8dfb..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv411p.rst +++ /dev/null @@ -1,122 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YUV411P: - -***************************** -V4L2_PIX_FMT_YUV411P ('411P') -***************************** - - -Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1. -Planar layout as opposed to ``V4L2_PIX_FMT_Y41P`` - - -Description -=========== - -This format is not commonly used. This is a planar format similar to the -4:2:2 planar format except with half as many chroma. The three -components are separated into three sub-images or planes. The Y plane is -first. The Y plane has one byte per pixel. The Cb plane immediately -follows the Y plane in memory. The Cb plane is ¼ the width of the Y -plane (and of the image). Each Cb belongs to 4 pixels all on the same -row. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, -Y'\ :sub:`02` and Y'\ :sub:`03`. Following the Cb plane is the Cr plane, -just like the Cb plane. - -If the Y plane has pad bytes after each row, then the Cr and Cb planes -have ¼ as many pad bytes after their rows. In other words, four C x rows -(including padding) is exactly as long as one Y row (including padding). - -**Byte Order.** -Each cell is one byte. - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cb\ :sub:`00` - * - start + 17: - - Cb\ :sub:`10` - * - start + 18: - - Cb\ :sub:`20` - * - start + 19: - - Cb\ :sub:`30` - * - start + 20: - - Cr\ :sub:`00` - * - start + 21: - - Cr\ :sub:`10` - * - start + 22: - - Cr\ :sub:`20` - * - start + 23: - - Cr\ :sub:`30` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - 1 - - - - 2 - - 3 - * - 0 - - Y - - Y - - C - - Y - - Y - * - 1 - - Y - - Y - - C - - Y - - Y - * - 2 - - Y - - Y - - C - - Y - - Y - * - 3 - - Y - - Y - - C - - Y - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv420.rst b/Documentation/media/uapi/v4l/pixfmt-yuv420.rst deleted file mode 100644 index f4f6f792a23e..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv420.rst +++ /dev/null @@ -1,150 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YVU420: -.. _V4L2-PIX-FMT-YUV420: - -********************************************************** -V4L2_PIX_FMT_YVU420 ('YV12'), V4L2_PIX_FMT_YUV420 ('YU12') -********************************************************** - - -V4L2_PIX_FMT_YUV420 -Planar formats with ½ horizontal and vertical chroma resolution, also -known as YUV 4:2:0 - - -Description -=========== - -These are planar formats, as opposed to a packed format. The three -components are separated into three sub- images or planes. The Y plane -is first. The Y plane has one byte per pixel. For -``V4L2_PIX_FMT_YVU420``, the Cr plane immediately follows the Y plane in -memory. The Cr plane is half the width and half the height of the Y -plane (and of the image). Each Cr belongs to four pixels, a two-by-two -square of the image. For example, Cr\ :sub:`0` belongs to Y'\ :sub:`00`, -Y'\ :sub:`01`, Y'\ :sub:`10`, and Y'\ :sub:`11`. Following the Cr plane -is the Cb plane, just like the Cr plane. ``V4L2_PIX_FMT_YUV420`` is the -same except the Cb plane comes first, then the Cr plane. - -If the Y plane has pad bytes after each row, then the Cr and Cb planes -have half as many pad bytes after their rows. In other words, two Cx -rows (including padding) is exactly as long as one Y row (including -padding). - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cr\ :sub:`00` - - Cr\ :sub:`01` - * - start + 18: - - Cr\ :sub:`10` - - Cr\ :sub:`11` - * - start + 20: - - Cb\ :sub:`00` - - Cb\ :sub:`01` - * - start + 22: - - Cb\ :sub:`10` - - Cb\ :sub:`11` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - - - Y - - - - Y - * - - - - - C - - - - - - - - C - - - * - 1 - - Y - - - - Y - - - - Y - - - - Y - * - - * - 2 - - Y - - - - Y - - - - Y - - - - Y - * - - - - - C - - - - - - - - C - - - * - 3 - - Y - - - - Y - - - - Y - - - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv420m.rst b/Documentation/media/uapi/v4l/pixfmt-yuv420m.rst deleted file mode 100644 index c29b30c6445a..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv420m.rst +++ /dev/null @@ -1,159 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YUV420M: -.. _v4l2-pix-fmt-yvu420m: - -************************************************************ -V4L2_PIX_FMT_YUV420M ('YM12'), V4L2_PIX_FMT_YVU420M ('YM21') -************************************************************ - - -V4L2_PIX_FMT_YVU420M -Variation of ``V4L2_PIX_FMT_YUV420`` and ``V4L2_PIX_FMT_YVU420`` with -planes non contiguous in memory. - - -Description -=========== - -This is a multi-planar format, as opposed to a packed format. The three -components are separated into three sub-images or planes. - -The Y plane is first. The Y plane has one byte per pixel. For -``V4L2_PIX_FMT_YUV420M`` the Cb data constitutes the second plane which -is half the width and half the height of the Y plane (and of the image). -Each Cb belongs to four pixels, a two-by-two square of the image. For -example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, -Y'\ :sub:`10`, and Y'\ :sub:`11`. The Cr data, just like the Cb plane, -is in the third plane. - -``V4L2_PIX_FMT_YVU420M`` is the same except the Cr data is stored in the -second plane and the Cb data in the third plane. - -If the Y plane has pad bytes after each row, then the Cb and Cr planes -have half as many pad bytes after their rows. In other words, two Cx -rows (including padding) is exactly as long as one Y row (including -padding). - -``V4L2_PIX_FMT_YUV420M`` and ``V4L2_PIX_FMT_YVU420M`` are intended to be -used only in drivers and applications that support the multi-planar API, -described in :ref:`planar-apis`. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start0 + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start0 + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start0 + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start0 + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - - * - start1 + 0: - - Cb\ :sub:`00` - - Cb\ :sub:`01` - * - start1 + 2: - - Cb\ :sub:`10` - - Cb\ :sub:`11` - * - - * - start2 + 0: - - Cr\ :sub:`00` - - Cr\ :sub:`01` - * - start2 + 2: - - Cr\ :sub:`10` - - Cr\ :sub:`11` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - - - 2 - - - - 3 - * - 0 - - Y - - - - Y - - - - Y - - - - Y - * - - - - - C - - - - - - - - C - - - * - 1 - - Y - - - - Y - - - - Y - - - - Y - * - - * - 2 - - Y - - - - Y - - - - Y - - - - Y - * - - - - - C - - - - - - - - C - - - * - 3 - - Y - - - - Y - - - - Y - - - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv422m.rst b/Documentation/media/uapi/v4l/pixfmt-yuv422m.rst deleted file mode 100644 index 737fd94a9ae9..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv422m.rst +++ /dev/null @@ -1,148 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YUV422M: -.. _v4l2-pix-fmt-yvu422m: - -************************************************************ -V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61') -************************************************************ - - -V4L2_PIX_FMT_YVU422M -Planar formats with ½ horizontal resolution, also known as YUV and YVU -4:2:2 - - -Description -=========== - -This is a multi-planar format, as opposed to a packed format. The three -components are separated into three sub-images or planes. - -The Y plane is first. The Y plane has one byte per pixel. For -``V4L2_PIX_FMT_YUV422M`` the Cb data constitutes the second plane which -is half the width of the Y plane (and of the image). Each Cb belongs to -two pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, -Y'\ :sub:`01`. The Cr data, just like the Cb plane, is in the third -plane. - -``V4L2_PIX_FMT_YVU422M`` is the same except the Cr data is stored in the -second plane and the Cb data in the third plane. - -If the Y plane has pad bytes after each row, then the Cb and Cr planes -have half as many pad bytes after their rows. In other words, two Cx -rows (including padding) is exactly as long as one Y row (including -padding). - -``V4L2_PIX_FMT_YUV422M`` and ``V4L2_PIX_FMT_YVU422M`` are intended to be -used only in drivers and applications that support the multi-planar API, -described in :ref:`planar-apis`. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start0 + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start0 + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start0 + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start0 + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - - * - start1 + 0: - - Cb\ :sub:`00` - - Cb\ :sub:`01` - * - start1 + 2: - - Cb\ :sub:`10` - - Cb\ :sub:`11` - * - start1 + 4: - - Cb\ :sub:`20` - - Cb\ :sub:`21` - * - start1 + 6: - - Cb\ :sub:`30` - - Cb\ :sub:`31` - * - - * - start2 + 0: - - Cr\ :sub:`00` - - Cr\ :sub:`01` - * - start2 + 2: - - Cr\ :sub:`10` - - Cr\ :sub:`11` - * - start2 + 4: - - Cr\ :sub:`20` - - Cr\ :sub:`21` - * - start2 + 6: - - Cr\ :sub:`30` - - Cr\ :sub:`31` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - C - - Y - - Y - - C - - Y - * - 1 - - Y - - C - - Y - - Y - - C - - Y - * - 2 - - Y - - C - - Y - - Y - - C - - Y - * - 3 - - Y - - C - - Y - - Y - - C - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst b/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst deleted file mode 100644 index 7cebb6ebb621..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst +++ /dev/null @@ -1,136 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YUV422P: - -***************************** -V4L2_PIX_FMT_YUV422P ('422P') -***************************** - - -Format with ½ horizontal chroma resolution, also known as YUV 4:2:2. -Planar layout as opposed to ``V4L2_PIX_FMT_YUYV`` - - -Description -=========== - -This format is not commonly used. This is a planar version of the YUYV -format. The three components are separated into three sub-images or -planes. The Y plane is first. The Y plane has one byte per pixel. The Cb -plane immediately follows the Y plane in memory. The Cb plane is half -the width of the Y plane (and of the image). Each Cb belongs to two -pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, -Y'\ :sub:`01`. Following the Cb plane is the Cr plane, just like the Cb -plane. - -If the Y plane has pad bytes after each row, then the Cr and Cb planes -have half as many pad bytes after their rows. In other words, two Cx -rows (including padding) is exactly as long as one Y row (including -padding). - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - start + 16: - - Cb\ :sub:`00` - - Cb\ :sub:`01` - * - start + 18: - - Cb\ :sub:`10` - - Cb\ :sub:`11` - * - start + 20: - - Cb\ :sub:`20` - - Cb\ :sub:`21` - * - start + 22: - - Cb\ :sub:`30` - - Cb\ :sub:`31` - * - start + 24: - - Cr\ :sub:`00` - - Cr\ :sub:`01` - * - start + 26: - - Cr\ :sub:`10` - - Cr\ :sub:`11` - * - start + 28: - - Cr\ :sub:`20` - - Cr\ :sub:`21` - * - start + 30: - - Cr\ :sub:`30` - - Cr\ :sub:`31` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - C - - Y - - Y - - C - - Y - * - 1 - - Y - - C - - Y - - Y - - C - - Y - * - 2 - - Y - - C - - Y - - Y - - C - - Y - * - 3 - - Y - - C - - Y - - Y - - C - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv444m.rst b/Documentation/media/uapi/v4l/pixfmt-yuv444m.rst deleted file mode 100644 index 8f14ca378816..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuv444m.rst +++ /dev/null @@ -1,148 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YUV444M: -.. _v4l2-pix-fmt-yvu444m: - -************************************************************ -V4L2_PIX_FMT_YUV444M ('YM24'), V4L2_PIX_FMT_YVU444M ('YM42') -************************************************************ - - -V4L2_PIX_FMT_YVU444M -Planar formats with full horizontal resolution, also known as YUV and -YVU 4:4:4 - - -Description -=========== - -This is a multi-planar format, as opposed to a packed format. The three -components are separated into three sub-images or planes. - -The Y plane is first. The Y plane has one byte per pixel. For -``V4L2_PIX_FMT_YUV444M`` the Cb data constitutes the second plane which -is the same width and height as the Y plane (and as the image). The Cr -data, just like the Cb plane, is in the third plane. - -``V4L2_PIX_FMT_YVU444M`` is the same except the Cr data is stored in the -second plane and the Cb data in the third plane. - -If the Y plane has pad bytes after each row, then the Cb and Cr planes -have the same number of pad bytes after their rows. - -``V4L2_PIX_FMT_YUV444M`` and ``V4L2_PIX_FMT_YUV444M`` are intended to be -used only in drivers and applications that support the multi-planar API, -described in :ref:`planar-apis`. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start0 + 0: - - Y'\ :sub:`00` - - Y'\ :sub:`01` - - Y'\ :sub:`02` - - Y'\ :sub:`03` - * - start0 + 4: - - Y'\ :sub:`10` - - Y'\ :sub:`11` - - Y'\ :sub:`12` - - Y'\ :sub:`13` - * - start0 + 8: - - Y'\ :sub:`20` - - Y'\ :sub:`21` - - Y'\ :sub:`22` - - Y'\ :sub:`23` - * - start0 + 12: - - Y'\ :sub:`30` - - Y'\ :sub:`31` - - Y'\ :sub:`32` - - Y'\ :sub:`33` - * - - * - start1 + 0: - - Cb\ :sub:`00` - - Cb\ :sub:`01` - - Cb\ :sub:`02` - - Cb\ :sub:`03` - * - start1 + 4: - - Cb\ :sub:`10` - - Cb\ :sub:`11` - - Cb\ :sub:`12` - - Cb\ :sub:`13` - * - start1 + 8: - - Cb\ :sub:`20` - - Cb\ :sub:`21` - - Cb\ :sub:`22` - - Cb\ :sub:`23` - * - start1 + 12: - - Cb\ :sub:`20` - - Cb\ :sub:`21` - - Cb\ :sub:`32` - - Cb\ :sub:`33` - * - - * - start2 + 0: - - Cr\ :sub:`00` - - Cr\ :sub:`01` - - Cr\ :sub:`02` - - Cr\ :sub:`03` - * - start2 + 4: - - Cr\ :sub:`10` - - Cr\ :sub:`11` - - Cr\ :sub:`12` - - Cr\ :sub:`13` - * - start2 + 8: - - Cr\ :sub:`20` - - Cr\ :sub:`21` - - Cr\ :sub:`22` - - Cr\ :sub:`23` - * - start2 + 12: - - Cr\ :sub:`30` - - Cr\ :sub:`31` - - Cr\ :sub:`32` - - Cr\ :sub:`33` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - 1 - - 2 - - 3 - * - 0 - - YC - - YC - - YC - - YC - * - 1 - - YC - - YC - - YC - - YC - * - 2 - - YC - - YC - - YC - - YC - * - 3 - - YC - - YC - - YC - - YC diff --git a/Documentation/media/uapi/v4l/pixfmt-yuyv.rst b/Documentation/media/uapi/v4l/pixfmt-yuyv.rst deleted file mode 100644 index d86d7f086c41..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yuyv.rst +++ /dev/null @@ -1,125 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YUYV: - -************************** -V4L2_PIX_FMT_YUYV ('YUYV') -************************** - - -Packed format with ½ horizontal chroma resolution, also known as YUV -4:2:2 - - -Description -=========== - -In this format each four bytes is two pixels. Each four bytes is two -Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr -belong to both pixels. As you can see, the Cr and Cb components have -half the horizontal resolution of the Y component. ``V4L2_PIX_FMT_YUYV`` -is known in the Windows environment as YUY2. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Cb\ :sub:`00` - - Y'\ :sub:`01` - - Cr\ :sub:`00` - - Y'\ :sub:`02` - - Cb\ :sub:`01` - - Y'\ :sub:`03` - - Cr\ :sub:`01` - * - start + 8: - - Y'\ :sub:`10` - - Cb\ :sub:`10` - - Y'\ :sub:`11` - - Cr\ :sub:`10` - - Y'\ :sub:`12` - - Cb\ :sub:`11` - - Y'\ :sub:`13` - - Cr\ :sub:`11` - * - start + 16: - - Y'\ :sub:`20` - - Cb\ :sub:`20` - - Y'\ :sub:`21` - - Cr\ :sub:`20` - - Y'\ :sub:`22` - - Cb\ :sub:`21` - - Y'\ :sub:`23` - - Cr\ :sub:`21` - * - start + 24: - - Y'\ :sub:`30` - - Cb\ :sub:`30` - - Y'\ :sub:`31` - - Cr\ :sub:`30` - - Y'\ :sub:`32` - - Cb\ :sub:`31` - - Y'\ :sub:`33` - - Cr\ :sub:`31` - - -**Color Sample Location:** - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - - - 2 - - - - 3 - * - 0 - - Y - - C - - Y - - - - Y - - C - - Y - * - 1 - - Y - - C - - Y - - - - Y - - C - - Y - * - 2 - - Y - - C - - Y - - - - Y - - C - - Y - * - 3 - - Y - - C - - Y - - - - Y - - C - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-yvyu.rst b/Documentation/media/uapi/v4l/pixfmt-yvyu.rst deleted file mode 100644 index 656a830fed02..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-yvyu.rst +++ /dev/null @@ -1,115 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-YVYU: - -************************** -V4L2_PIX_FMT_YVYU ('YVYU') -************************** - - -Variation of ``V4L2_PIX_FMT_YUYV`` with different order of samples in -memory - - -Description -=========== - -In this format each four bytes is two pixels. Each four bytes is two -Y's, a Cb and a Cr. Each Y goes to one of the pixels, and the Cb and Cr -belong to both pixels. As you can see, the Cr and Cb components have -half the horizontal resolution of the Y component. - -**Byte Order.** -Each cell is one byte. - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Y'\ :sub:`00` - - Cr\ :sub:`00` - - Y'\ :sub:`01` - - Cb\ :sub:`00` - - Y'\ :sub:`02` - - Cr\ :sub:`01` - - Y'\ :sub:`03` - - Cb\ :sub:`01` - * - start + 8: - - Y'\ :sub:`10` - - Cr\ :sub:`10` - - Y'\ :sub:`11` - - Cb\ :sub:`10` - - Y'\ :sub:`12` - - Cr\ :sub:`11` - - Y'\ :sub:`13` - - Cb\ :sub:`11` - * - start + 16: - - Y'\ :sub:`20` - - Cr\ :sub:`20` - - Y'\ :sub:`21` - - Cb\ :sub:`20` - - Y'\ :sub:`22` - - Cr\ :sub:`21` - - Y'\ :sub:`23` - - Cb\ :sub:`21` - * - start + 24: - - Y'\ :sub:`30` - - Cr\ :sub:`30` - - Y'\ :sub:`31` - - Cb\ :sub:`30` - - Y'\ :sub:`32` - - Cr\ :sub:`31` - - Y'\ :sub:`33` - - Cb\ :sub:`31` - - -**Color Sample Location:** - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - - - 0 - - - - 1 - - 2 - - - - 3 - * - 0 - - Y - - C - - Y - - Y - - C - - Y - * - 1 - - Y - - C - - Y - - Y - - C - - Y - * - 2 - - Y - - C - - Y - - Y - - C - - Y - * - 3 - - Y - - C - - Y - - Y - - C - - Y diff --git a/Documentation/media/uapi/v4l/pixfmt-z16.rst b/Documentation/media/uapi/v4l/pixfmt-z16.rst deleted file mode 100644 index eccf235bf02d..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt-z16.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _V4L2-PIX-FMT-Z16: - -************************* -V4L2_PIX_FMT_Z16 ('Z16 ') -************************* - - -16-bit depth data with distance values at each pixel - - -Description -=========== - -This is a 16-bit format, representing depth data. Each pixel is a -distance to the respective point in the image coordinates. Distance unit -can vary and has to be negotiated with the device separately. Each pixel -is stored in a 16-bit word in the little endian byte order. - -**Byte Order.** -Each cell is one byte. - - - - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - - * - start + 0: - - Z\ :sub:`00low` - - Z\ :sub:`00high` - - Z\ :sub:`01low` - - Z\ :sub:`01high` - - Z\ :sub:`02low` - - Z\ :sub:`02high` - - Z\ :sub:`03low` - - Z\ :sub:`03high` - * - start + 8: - - Z\ :sub:`10low` - - Z\ :sub:`10high` - - Z\ :sub:`11low` - - Z\ :sub:`11high` - - Z\ :sub:`12low` - - Z\ :sub:`12high` - - Z\ :sub:`13low` - - Z\ :sub:`13high` - * - start + 16: - - Z\ :sub:`20low` - - Z\ :sub:`20high` - - Z\ :sub:`21low` - - Z\ :sub:`21high` - - Z\ :sub:`22low` - - Z\ :sub:`22high` - - Z\ :sub:`23low` - - Z\ :sub:`23high` - * - start + 24: - - Z\ :sub:`30low` - - Z\ :sub:`30high` - - Z\ :sub:`31low` - - Z\ :sub:`31high` - - Z\ :sub:`32low` - - Z\ :sub:`32high` - - Z\ :sub:`33low` - - Z\ :sub:`33high` diff --git a/Documentation/media/uapi/v4l/pixfmt.rst b/Documentation/media/uapi/v4l/pixfmt.rst deleted file mode 100644 index a7d4cd43a298..000000000000 --- a/Documentation/media/uapi/v4l/pixfmt.rst +++ /dev/null @@ -1,45 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _pixfmt: - -############# -Image Formats -############# -The V4L2 API was primarily designed for devices exchanging image data -with applications. The struct :c:type:`v4l2_pix_format` and -struct :c:type:`v4l2_pix_format_mplane` structures define the -format and layout of an image in memory. The former is used with the -single-planar API, while the latter is used with the multi-planar -version (see :ref:`planar-apis`). Image formats are negotiated with -the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. (The explanations here -focus on video capturing and output, for overlay frame buffer formats -see also :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`.) - - -.. toctree:: - :maxdepth: 1 - - pixfmt-v4l2 - pixfmt-v4l2-mplane - pixfmt-intro - pixfmt-indexed - pixfmt-rgb - pixfmt-bayer - yuv-formats - hsv-formats - depth-formats - pixfmt-compressed - sdr-formats - tch-formats - meta-formats - pixfmt-reserved - colorspaces - colorspaces-defs - colorspaces-details diff --git a/Documentation/media/uapi/v4l/planar-apis.rst b/Documentation/media/uapi/v4l/planar-apis.rst deleted file mode 100644 index a422dc9d592c..000000000000 --- a/Documentation/media/uapi/v4l/planar-apis.rst +++ /dev/null @@ -1,68 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _planar-apis: - -***************************** -Single- and multi-planar APIs -***************************** - -Some devices require data for each input or output video frame to be -placed in discontiguous memory buffers. In such cases, one video frame -has to be addressed using more than one memory address, i.e. one pointer -per "plane". A plane is a sub-buffer of the current frame. For examples -of such formats see :ref:`pixfmt`. - -Initially, V4L2 API did not support multi-planar buffers and a set of -extensions has been introduced to handle them. Those extensions -constitute what is being referred to as the "multi-planar API". - -Some of the V4L2 API calls and structures are interpreted differently, -depending on whether single- or multi-planar API is being used. An -application can choose whether to use one or the other by passing a -corresponding buffer type to its ioctl calls. Multi-planar versions of -buffer types are suffixed with an ``_MPLANE`` string. For a list of -available multi-planar buffer types see enum -:c:type:`v4l2_buf_type`. - - -Multi-planar formats -==================== - -Multi-planar API introduces new multi-planar formats. Those formats use -a separate set of FourCC codes. It is important to distinguish between -the multi-planar API and a multi-planar format. Multi-planar API calls -can handle all single-planar formats as well (as long as they are passed -in multi-planar API structures), while the single-planar API cannot -handle multi-planar formats. - - -Calls that distinguish between single and multi-planar APIs -=========================================================== - -:ref:`VIDIOC_QUERYCAP <VIDIOC_QUERYCAP>` - Two additional multi-planar capabilities are added. They can be set - together with non-multi-planar ones for devices that handle both - single- and multi-planar formats. - -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`, :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` - New structures for describing multi-planar formats are added: struct - :c:type:`v4l2_pix_format_mplane` and - struct :c:type:`v4l2_plane_pix_format`. - Drivers may define new multi-planar formats, which have distinct - FourCC codes from the existing single-planar ones. - -:ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_QUERYBUF <VIDIOC_QUERYBUF>` - A new struct :c:type:`v4l2_plane` structure for - describing planes is added. Arrays of this structure are passed in - the new ``m.planes`` field of struct - :c:type:`v4l2_buffer`. - -:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>` - Will allocate multi-planar buffers as requested. diff --git a/Documentation/media/uapi/v4l/querycap.rst b/Documentation/media/uapi/v4l/querycap.rst deleted file mode 100644 index 8d01ef52f780..000000000000 --- a/Documentation/media/uapi/v4l/querycap.rst +++ /dev/null @@ -1,41 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _querycap: - -********************* -Querying Capabilities -********************* - -Because V4L2 covers a wide variety of devices not all aspects of the API -are equally applicable to all types of devices. Furthermore devices of -the same type have different capabilities and this specification permits -the omission of a few complicated and less important parts of the API. - -The :ref:`VIDIOC_QUERYCAP` ioctl is available to -check if the kernel device is compatible with this specification, and to -query the :ref:`functions <devices>` and :ref:`I/O methods <io>` -supported by the device. - -Starting with kernel version 3.1, :ref:`VIDIOC_QUERYCAP` -will return the V4L2 API version used by the driver, with generally -matches the Kernel version. There's no need of using -:ref:`VIDIOC_QUERYCAP` to check if a specific ioctl -is supported, the V4L2 core now returns ``ENOTTY`` if a driver doesn't -provide support for an ioctl. - -Other features can be queried by calling the respective ioctl, for -example :ref:`VIDIOC_ENUMINPUT` to learn about the -number, types and names of video connectors on the device. Although -abstraction is a major objective of this API, the -:ref:`VIDIOC_QUERYCAP` ioctl also allows driver -specific applications to reliably identify the driver. - -All V4L2 drivers must support :ref:`VIDIOC_QUERYCAP`. -Applications should always call this ioctl after opening the device. diff --git a/Documentation/media/uapi/v4l/rw.rst b/Documentation/media/uapi/v4l/rw.rst deleted file mode 100644 index 6e498fcf32c4..000000000000 --- a/Documentation/media/uapi/v4l/rw.rst +++ /dev/null @@ -1,54 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _rw: - -********** -Read/Write -********** - -Input and output devices support the :ref:`read() <func-read>` and -:ref:`write() <func-write>` function, respectively, when the -``V4L2_CAP_READWRITE`` flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl is set. - -Drivers may need the CPU to copy the data, but they may also support DMA -to or from user memory, so this I/O method is not necessarily less -efficient than other methods merely exchanging buffer pointers. It is -considered inferior though because no meta-information like frame -counters or timestamps are passed. This information is necessary to -recognize frame dropping and to synchronize with other data streams. -However this is also the simplest I/O method, requiring little or no -setup to exchange data. It permits command line stunts like this (the -vidctrl tool is fictitious): - - -.. code-block:: none - - $ vidctrl /dev/video --input=0 --format=YUYV --size=352x288 - $ dd if=/dev/video of=myimage.422 bs=202752 count=1 - -To read from the device applications use the :ref:`read() <func-read>` -function, to write the :ref:`write() <func-write>` function. Drivers -must implement one I/O method if they exchange data with applications, -but it need not be this. [#f1]_ When reading or writing is supported, the -driver must also support the :ref:`select() <func-select>` and -:ref:`poll() <func-poll>` function. [#f2]_ - -.. [#f1] - It would be desirable if applications could depend on drivers - supporting all I/O interfaces, but as much as the complex memory - mapping I/O can be inadequate for some devices we have no reason to - require this interface, which is most useful for simple applications - capturing still images. - -.. [#f2] - At the driver level :ref:`select() <func-select>` and :ref:`poll() <func-poll>` are - the same, and :ref:`select() <func-select>` is too important to be optional. diff --git a/Documentation/media/uapi/v4l/sdr-formats.rst b/Documentation/media/uapi/v4l/sdr-formats.rst deleted file mode 100644 index f452f5574ebb..000000000000 --- a/Documentation/media/uapi/v4l/sdr-formats.rst +++ /dev/null @@ -1,29 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _sdr-formats: - -*********** -SDR Formats -*********** - -These formats are used for :ref:`SDR <sdr>` interface only. - - -.. toctree:: - :maxdepth: 1 - - pixfmt-sdr-cu08 - pixfmt-sdr-cu16le - pixfmt-sdr-cs08 - pixfmt-sdr-cs14le - pixfmt-sdr-ru12le - pixfmt-sdr-pcu16be - pixfmt-sdr-pcu18be - pixfmt-sdr-pcu20be diff --git a/Documentation/media/uapi/v4l/selection-api-configuration.rst b/Documentation/media/uapi/v4l/selection-api-configuration.rst deleted file mode 100644 index 6e0c98c37067..000000000000 --- a/Documentation/media/uapi/v4l/selection-api-configuration.rst +++ /dev/null @@ -1,144 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -************* -Configuration -************* - -Applications can use the :ref:`selection API <VIDIOC_G_SELECTION>` to -select an area in a video signal or a buffer, and to query for default -settings and hardware limits. - -Video hardware can have various cropping, composing and scaling -limitations. It may only scale up or down, support only discrete scaling -factors, or have different scaling abilities in the horizontal and -vertical directions. Also it may not support scaling at all. At the same -time the cropping/composing rectangles may have to be aligned, and both -the source and the sink may have arbitrary upper and lower size limits. -Therefore, as usual, drivers are expected to adjust the requested -parameters and return the actual values selected. An application can -control the rounding behaviour using -:ref:`constraint flags <v4l2-selection-flags>`. - - -Configuration of video capture -============================== - -See figure :ref:`sel-targets-capture` for examples of the selection -targets available for a video capture device. It is recommended to -configure the cropping targets before to the composing targets. - -The range of coordinates of the top left corner, width and height of -areas that can be sampled is given by the ``V4L2_SEL_TGT_CROP_BOUNDS`` -target. It is recommended for the driver developers to put the top/left -corner at position ``(0,0)``. The rectangle's coordinates are expressed -in pixels. - -The top left corner, width and height of the source rectangle, that is -the area actually sampled, is given by the ``V4L2_SEL_TGT_CROP`` target. -It uses the same coordinate system as ``V4L2_SEL_TGT_CROP_BOUNDS``. The -active cropping area must lie completely inside the capture boundaries. -The driver may further adjust the requested size and/or position -according to hardware limitations. - -Each capture device has a default source rectangle, given by the -``V4L2_SEL_TGT_CROP_DEFAULT`` target. This rectangle shall cover what the -driver writer considers the complete picture. Drivers shall set the -active crop rectangle to the default when the driver is first loaded, -but not later. - -The composing targets refer to a memory buffer. The limits of composing -coordinates are obtained using ``V4L2_SEL_TGT_COMPOSE_BOUNDS``. All -coordinates are expressed in pixels. The rectangle's top/left corner -must be located at position ``(0,0)``. The width and height are equal to -the image size set by :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. - -The part of a buffer into which the image is inserted by the hardware is -controlled by the ``V4L2_SEL_TGT_COMPOSE`` target. The rectangle's -coordinates are also expressed in the same coordinate system as the -bounds rectangle. The composing rectangle must lie completely inside -bounds rectangle. The driver must adjust the composing rectangle to fit -to the bounding limits. Moreover, the driver can perform other -adjustments according to hardware limitations. The application can -control rounding behaviour using -:ref:`constraint flags <v4l2-selection-flags>`. - -For capture devices the default composing rectangle is queried using -``V4L2_SEL_TGT_COMPOSE_DEFAULT``. It is usually equal to the bounding -rectangle. - -The part of a buffer that is modified by the hardware is given by -``V4L2_SEL_TGT_COMPOSE_PADDED``. It contains all pixels defined using -``V4L2_SEL_TGT_COMPOSE`` plus all padding data modified by hardware -during insertion process. All pixels outside this rectangle *must not* -be changed by the hardware. The content of pixels that lie inside the -padded area but outside active area is undefined. The application can -use the padded and active rectangles to detect where the rubbish pixels -are located and remove them if needed. - - -Configuration of video output -============================= - -For output devices targets and ioctls are used similarly to the video -capture case. The *composing* rectangle refers to the insertion of an -image into a video signal. The cropping rectangles refer to a memory -buffer. It is recommended to configure the composing targets before to -the cropping targets. - -The cropping targets refer to the memory buffer that contains an image -to be inserted into a video signal or graphical screen. The limits of -cropping coordinates are obtained using ``V4L2_SEL_TGT_CROP_BOUNDS``. -All coordinates are expressed in pixels. The top/left corner is always -point ``(0,0)``. The width and height is equal to the image size -specified using :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl. - -The top left corner, width and height of the source rectangle, that is -the area from which image date are processed by the hardware, is given -by the ``V4L2_SEL_TGT_CROP``. Its coordinates are expressed in in the -same coordinate system as the bounds rectangle. The active cropping area -must lie completely inside the crop boundaries and the driver may -further adjust the requested size and/or position according to hardware -limitations. - -For output devices the default cropping rectangle is queried using -``V4L2_SEL_TGT_CROP_DEFAULT``. It is usually equal to the bounding -rectangle. - -The part of a video signal or graphics display where the image is -inserted by the hardware is controlled by ``V4L2_SEL_TGT_COMPOSE`` -target. The rectangle's coordinates are expressed in pixels. The -composing rectangle must lie completely inside the bounds rectangle. The -driver must adjust the area to fit to the bounding limits. Moreover, the -driver can perform other adjustments according to hardware limitations. - -The device has a default composing rectangle, given by the -``V4L2_SEL_TGT_COMPOSE_DEFAULT`` target. This rectangle shall cover what -the driver writer considers the complete picture. It is recommended for -the driver developers to put the top/left corner at position ``(0,0)``. -Drivers shall set the active composing rectangle to the default one when -the driver is first loaded. - -The devices may introduce additional content to video signal other than -an image from memory buffers. It includes borders around an image. -However, such a padded area is driver-dependent feature not covered by -this document. Driver developers are encouraged to keep padded rectangle -equal to active one. The padded target is accessed by the -``V4L2_SEL_TGT_COMPOSE_PADDED`` identifier. It must contain all pixels -from the ``V4L2_SEL_TGT_COMPOSE`` target. - - -Scaling control -=============== - -An application can detect if scaling is performed by comparing the width -and the height of rectangles obtained using ``V4L2_SEL_TGT_CROP`` and -``V4L2_SEL_TGT_COMPOSE`` targets. If these are not equal then the -scaling is applied. The application can compute the scaling ratios using -these values. diff --git a/Documentation/media/uapi/v4l/selection-api-examples.rst b/Documentation/media/uapi/v4l/selection-api-examples.rst deleted file mode 100644 index bb288b06cc17..000000000000 --- a/Documentation/media/uapi/v4l/selection-api-examples.rst +++ /dev/null @@ -1,91 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -******** -Examples -******** - -(A video capture device is assumed; change -``V4L2_BUF_TYPE_VIDEO_CAPTURE`` for other devices; change target to -``V4L2_SEL_TGT_COMPOSE_*`` family to configure composing area) - -Example: Resetting the cropping parameters -========================================== - -.. code-block:: c - - struct v4l2_selection sel = { - .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, - .target = V4L2_SEL_TGT_CROP_DEFAULT, - }; - ret = ioctl(fd, VIDIOC_G_SELECTION, &sel); - if (ret) - exit(-1); - sel.target = V4L2_SEL_TGT_CROP; - ret = ioctl(fd, VIDIOC_S_SELECTION, &sel); - if (ret) - exit(-1); - -Setting a composing area on output of size of *at most* half of limit -placed at a center of a display. - -Example: Simple downscaling -=========================== - -.. code-block:: c - - struct v4l2_selection sel = { - .type = V4L2_BUF_TYPE_VIDEO_OUTPUT, - .target = V4L2_SEL_TGT_COMPOSE_BOUNDS, - }; - struct v4l2_rect r; - - ret = ioctl(fd, VIDIOC_G_SELECTION, &sel); - if (ret) - exit(-1); - /* setting smaller compose rectangle */ - r.width = sel.r.width / 2; - r.height = sel.r.height / 2; - r.left = sel.r.width / 4; - r.top = sel.r.height / 4; - sel.r = r; - sel.target = V4L2_SEL_TGT_COMPOSE; - sel.flags = V4L2_SEL_FLAG_LE; - ret = ioctl(fd, VIDIOC_S_SELECTION, &sel); - if (ret) - exit(-1); - -A video output device is assumed; change ``V4L2_BUF_TYPE_VIDEO_OUTPUT`` -for other devices - -Example: Querying for scaling factors -===================================== - -.. code-block:: c - - struct v4l2_selection compose = { - .type = V4L2_BUF_TYPE_VIDEO_OUTPUT, - .target = V4L2_SEL_TGT_COMPOSE, - }; - struct v4l2_selection crop = { - .type = V4L2_BUF_TYPE_VIDEO_OUTPUT, - .target = V4L2_SEL_TGT_CROP, - }; - double hscale, vscale; - - ret = ioctl(fd, VIDIOC_G_SELECTION, &compose); - if (ret) - exit(-1); - ret = ioctl(fd, VIDIOC_G_SELECTION, &crop); - if (ret) - exit(-1); - - /* computing scaling factors */ - hscale = (double)compose.r.width / crop.r.width; - vscale = (double)compose.r.height / crop.r.height; diff --git a/Documentation/media/uapi/v4l/selection-api-intro.rst b/Documentation/media/uapi/v4l/selection-api-intro.rst deleted file mode 100644 index 0faed02d0226..000000000000 --- a/Documentation/media/uapi/v4l/selection-api-intro.rst +++ /dev/null @@ -1,35 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -************ -Introduction -************ - -Some video capture devices can sample a subsection of a picture and -shrink or enlarge it to an image of arbitrary size. Next, the devices -can insert the image into larger one. Some video output devices can crop -part of an input image, scale it up or down and insert it at an -arbitrary scan line and horizontal offset into a video signal. We call -these abilities cropping, scaling and composing. - -On a video *capture* device the source is a video signal, and the -cropping target determine the area actually sampled. The sink is an -image stored in a memory buffer. The composing area specifies which part -of the buffer is actually written to by the hardware. - -On a video *output* device the source is an image in a memory buffer, -and the cropping target is a part of an image to be shown on a display. -The sink is the display or the graphics screen. The application may -select the part of display where the image should be displayed. The size -and position of such a window is controlled by the compose target. - -Rectangles for all cropping and composing targets are defined even if -the device does supports neither cropping nor composing. Their size and -position will be fixed in such a case. If the device does not support -scaling then the cropping and composing rectangles have the same size. diff --git a/Documentation/media/uapi/v4l/selection-api-targets.rst b/Documentation/media/uapi/v4l/selection-api-targets.rst deleted file mode 100644 index 83d633bcbd6f..000000000000 --- a/Documentation/media/uapi/v4l/selection-api-targets.rst +++ /dev/null @@ -1,27 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -***************** -Selection targets -***************** - - -.. _sel-targets-capture: - -.. kernel-figure:: selection.svg - :alt: selection.svg - :align: center - - Cropping and composing targets - - Targets used by a cropping, composing and scaling process - - - -See :ref:`v4l2-selection-targets` for more information. diff --git a/Documentation/media/uapi/v4l/selection-api-vs-crop-api.rst b/Documentation/media/uapi/v4l/selection-api-vs-crop-api.rst deleted file mode 100644 index 79b3abca341a..000000000000 --- a/Documentation/media/uapi/v4l/selection-api-vs-crop-api.rst +++ /dev/null @@ -1,46 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _selection-vs-crop: - -******************************** -Comparison with old cropping API -******************************** - -The selection API was introduced to cope with deficiencies of the -older :ref:`CROP API <crop>`, that was designed to control simple -capture devices. Later the cropping API was adopted by video output -drivers. The ioctls are used to select a part of the display were the -video signal is inserted. It should be considered as an API abuse -because the described operation is actually the composing. The -selection API makes a clear distinction between composing and cropping -operations by setting the appropriate targets. - -The CROP API lacks any support for composing to and cropping from an -image inside a memory buffer. The application could configure a -capture device to fill only a part of an image by abusing V4L2 -API. Cropping a smaller image from a larger one is achieved by setting -the field ``bytesperline`` at struct :c:type:`v4l2_pix_format`. -Introducing an image offsets could be done by modifying field -``m_userptr`` at struct :c:type:`v4l2_buffer` before calling -:ref:`VIDIOC_QBUF <VIDIOC_QBUF>`. Those operations should be avoided -because they are not portable (endianness), and do not work for -macroblock and Bayer formats and mmap buffers. - -The selection API deals with configuration of buffer -cropping/composing in a clear, intuitive and portable way. Next, with -the selection API the concepts of the padded target and constraints -flags are introduced. Finally, struct :c:type:`v4l2_crop` and struct -:c:type:`v4l2_cropcap` have no reserved fields. Therefore there is no -way to extend their functionality. The new struct -:c:type:`v4l2_selection` provides a lot of place for future -extensions. - -Driver developers are encouraged to implement only selection API. The -former cropping API would be simulated using the new one. diff --git a/Documentation/media/uapi/v4l/selection-api.rst b/Documentation/media/uapi/v4l/selection-api.rst deleted file mode 100644 index 5386004e87cf..000000000000 --- a/Documentation/media/uapi/v4l/selection-api.rst +++ /dev/null @@ -1,23 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _selection-api: - -Cropping, composing and scaling -- the SELECTION API -==================================================== - - -.. toctree:: - :maxdepth: 1 - - selection-api-intro.rst - selection-api-targets.rst - selection-api-configuration.rst - selection-api-vs-crop-api.rst - selection-api-examples.rst diff --git a/Documentation/media/uapi/v4l/selection.svg b/Documentation/media/uapi/v4l/selection.svg deleted file mode 100644 index 59d2bec9b278..000000000000 --- a/Documentation/media/uapi/v4l/selection.svg +++ /dev/null @@ -1,1178 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!-- - This file is dual-licensed: you can use it either under the terms - of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this - dual licensing only applies to this file, and not this project as a - whole. - - a) This file is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation version 2 of - the License. - - This file is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - Or, alternatively, - - b) Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-selections-common: - -Common selection definitions -============================ - -While the :ref:`V4L2 selection API <selection-api>` and -:ref:`V4L2 subdev selection APIs <v4l2-subdev-selections>` are very -similar, there's one fundamental difference between the two. On -sub-device API, the selection rectangle refers to the media bus format, -and is bound to a sub-device's pad. On the V4L2 interface the selection -rectangles refer to the in-memory pixel format. - -This section defines the common definitions of the selection interfaces -on the two APIs. - - -.. toctree:: - :maxdepth: 1 - - v4l2-selection-targets - v4l2-selection-flags diff --git a/Documentation/media/uapi/v4l/standard.rst b/Documentation/media/uapi/v4l/standard.rst deleted file mode 100644 index bf8959b72988..000000000000 --- a/Documentation/media/uapi/v4l/standard.rst +++ /dev/null @@ -1,192 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _standard: - -*************** -Video Standards -*************** - -Video devices typically support one or more different video standards or -variations of standards. Each video input and output may support another -set of standards. This set is reported by the ``std`` field of struct -:c:type:`v4l2_input` and struct -:c:type:`v4l2_output` returned by the -:ref:`VIDIOC_ENUMINPUT` and -:ref:`VIDIOC_ENUMOUTPUT` ioctls, respectively. - -V4L2 defines one bit for each analog video standard currently in use -worldwide, and sets aside bits for driver defined standards, e. g. -hybrid standards to watch NTSC video tapes on PAL TVs and vice versa. -Applications can use the predefined bits to select a particular -standard, although presenting the user a menu of supported standards is -preferred. To enumerate and query the attributes of the supported -standards applications use the :ref:`VIDIOC_ENUMSTD` -ioctl. - -Many of the defined standards are actually just variations of a few -major standards. The hardware may in fact not distinguish between them, -or do so internal and switch automatically. Therefore enumerated -standards also contain sets of one or more standard bits. - -Assume a hypothetic tuner capable of demodulating B/PAL, G/PAL and I/PAL -signals. The first enumerated standard is a set of B and G/PAL, switched -automatically depending on the selected radio frequency in UHF or VHF -band. Enumeration gives a "PAL-B/G" or "PAL-I" choice. Similar a -Composite input may collapse standards, enumerating "PAL-B/G/H/I", -"NTSC-M" and "SECAM-D/K". [#f1]_ - -To query and select the standard used by the current video input or -output applications call the :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and -:ref:`VIDIOC_S_STD <VIDIOC_G_STD>` ioctl, respectively. The -*received* standard can be sensed with the -:ref:`VIDIOC_QUERYSTD` ioctl. - -.. note:: - - The parameter of all these ioctls is a pointer to a - :ref:`v4l2_std_id <v4l2-std-id>` type (a standard set), *not* an - index into the standard enumeration. Drivers must implement all video - standard ioctls when the device has one or more video inputs or outputs. - -Special rules apply to devices such as USB cameras where the notion of -video standards makes little sense. More generally for any capture or -output device which is: - -- incapable of capturing fields or frames at the nominal rate of the - video standard, or - -- that does not support the video standard formats at all. - -Here the driver shall set the ``std`` field of struct -:c:type:`v4l2_input` and struct -:c:type:`v4l2_output` to zero and the :ref:`VIDIOC_G_STD <VIDIOC_G_STD>`, -:ref:`VIDIOC_S_STD <VIDIOC_G_STD>`, :ref:`VIDIOC_QUERYSTD` and :ref:`VIDIOC_ENUMSTD` ioctls -shall return the ``ENOTTY`` error code or the ``EINVAL`` error code. - -Applications can make use of the :ref:`input-capabilities` and -:ref:`output-capabilities` flags to determine whether the video -standard ioctls can be used with the given input or output. - -Example: Information about the current video standard -===================================================== - -.. code-block:: c - - v4l2_std_id std_id; - struct v4l2_standard standard; - - if (-1 == ioctl(fd, VIDIOC_G_STD, &std_id)) { - /* Note when VIDIOC_ENUMSTD always returns ENOTTY this - is no video device or it falls under the USB exception, - and VIDIOC_G_STD returning ENOTTY is no error. */ - - perror("VIDIOC_G_STD"); - exit(EXIT_FAILURE); - } - - memset(&standard, 0, sizeof(standard)); - standard.index = 0; - - while (0 == ioctl(fd, VIDIOC_ENUMSTD, &standard)) { - if (standard.id & std_id) { - printf("Current video standard: %s\\n", standard.name); - exit(EXIT_SUCCESS); - } - - standard.index++; - } - - /* EINVAL indicates the end of the enumeration, which cannot be - empty unless this device falls under the USB exception. */ - - if (errno == EINVAL || standard.index == 0) { - perror("VIDIOC_ENUMSTD"); - exit(EXIT_FAILURE); - } - -Example: Listing the video standards supported by the current input -=================================================================== - -.. code-block:: c - - struct v4l2_input input; - struct v4l2_standard standard; - - memset(&input, 0, sizeof(input)); - - if (-1 == ioctl(fd, VIDIOC_G_INPUT, &input.index)) { - perror("VIDIOC_G_INPUT"); - exit(EXIT_FAILURE); - } - - if (-1 == ioctl(fd, VIDIOC_ENUMINPUT, &input)) { - perror("VIDIOC_ENUM_INPUT"); - exit(EXIT_FAILURE); - } - - printf("Current input %s supports:\\n", input.name); - - memset(&standard, 0, sizeof(standard)); - standard.index = 0; - - while (0 == ioctl(fd, VIDIOC_ENUMSTD, &standard)) { - if (standard.id & input.std) - printf("%s\\n", standard.name); - - standard.index++; - } - - /* EINVAL indicates the end of the enumeration, which cannot be - empty unless this device falls under the USB exception. */ - - if (errno != EINVAL || standard.index == 0) { - perror("VIDIOC_ENUMSTD"); - exit(EXIT_FAILURE); - } - -Example: Selecting a new video standard -======================================= - -.. code-block:: c - - struct v4l2_input input; - v4l2_std_id std_id; - - memset(&input, 0, sizeof(input)); - - if (-1 == ioctl(fd, VIDIOC_G_INPUT, &input.index)) { - perror("VIDIOC_G_INPUT"); - exit(EXIT_FAILURE); - } - - if (-1 == ioctl(fd, VIDIOC_ENUMINPUT, &input)) { - perror("VIDIOC_ENUM_INPUT"); - exit(EXIT_FAILURE); - } - - if (0 == (input.std & V4L2_STD_PAL_BG)) { - fprintf(stderr, "Oops. B/G PAL is not supported.\\n"); - exit(EXIT_FAILURE); - } - - /* Note this is also supposed to work when only B - or G/PAL is supported. */ - - std_id = V4L2_STD_PAL_BG; - - if (-1 == ioctl(fd, VIDIOC_S_STD, &std_id)) { - perror("VIDIOC_S_STD"); - exit(EXIT_FAILURE); - } - -.. [#f1] - Some users are already confused by technical terms PAL, NTSC and - SECAM. There is no point asking them to distinguish between B, G, D, - or K when the software or hardware can do that automatically. diff --git a/Documentation/media/uapi/v4l/streaming-par.rst b/Documentation/media/uapi/v4l/streaming-par.rst deleted file mode 100644 index 425bd0ff1477..000000000000 --- a/Documentation/media/uapi/v4l/streaming-par.rst +++ /dev/null @@ -1,40 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _streaming-par: - -******************** -Streaming Parameters -******************** - -Streaming parameters are intended to optimize the video capture process -as well as I/O. Presently applications can request a high quality -capture mode with the :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctl. - -The current video standard determines a nominal number of frames per -second. If less than this number of frames is to be captured or output, -applications can request frame skipping or duplicating on the driver -side. This is especially useful when using the -:ref:`read() <func-read>` or :ref:`write() <func-write>`, which are -not augmented by timestamps or sequence counters, and to avoid -unnecessary data copying. - -Finally these ioctls can be used to determine the number of buffers used -internally by a driver in read/write mode. For implications see the -section discussing the :ref:`read() <func-read>` function. - -To get and set the streaming parameters applications call the -:ref:`VIDIOC_G_PARM <VIDIOC_G_PARM>` and -:ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctl, respectively. They take -a pointer to a struct :c:type:`v4l2_streamparm`, which -contains a union holding separate parameters for input and output -devices. - -These ioctls are optional, drivers need not implement them. If so, they -return the ``EINVAL`` error code. diff --git a/Documentation/media/uapi/v4l/subdev-formats.rst b/Documentation/media/uapi/v4l/subdev-formats.rst deleted file mode 100644 index 17bfb2beaa6a..000000000000 --- a/Documentation/media/uapi/v4l/subdev-formats.rst +++ /dev/null @@ -1,7833 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-mbus-format: - -Media Bus Formats -================= - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_mbus_framefmt - -.. flat-table:: struct v4l2_mbus_framefmt - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``width`` - - Image width in pixels. - * - __u32 - - ``height`` - - Image height in pixels. If ``field`` is one of ``V4L2_FIELD_TOP``, - ``V4L2_FIELD_BOTTOM`` or ``V4L2_FIELD_ALTERNATE`` then height - refers to the number of lines in the field, otherwise it refers to - the number of lines in the frame (which is twice the field height - for interlaced formats). - * - __u32 - - ``code`` - - Format code, from enum - :ref:`v4l2_mbus_pixelcode <v4l2-mbus-pixelcode>`. - * - __u32 - - ``field`` - - Field order, from enum :c:type:`v4l2_field`. See - :ref:`field-order` for details. - * - __u32 - - ``colorspace`` - - Image colorspace, from enum - :c:type:`v4l2_colorspace`. See - :ref:`colorspaces` for details. - * - __u16 - - ``ycbcr_enc`` - - Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u16 - - ``quantization`` - - Quantization range, from enum :c:type:`v4l2_quantization`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u16 - - ``xfer_func`` - - Transfer function, from enum :c:type:`v4l2_xfer_func`. - This information supplements the ``colorspace`` and must be set by - the driver for capture streams and by the application for output - streams, see :ref:`colorspaces`. - * - __u16 - - ``reserved``\ [11] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - - -.. _v4l2-mbus-pixelcode: - -Media Bus Pixel Codes ---------------------- - -The media bus pixel codes describe image formats as flowing over -physical buses (both between separate physical components and inside -SoC devices). This should not be confused with the V4L2 pixel formats -that describe, using four character codes, image formats as stored in -memory. - -While there is a relationship between image formats on buses and image -formats in memory (a raw Bayer image won't be magically converted to -JPEG just by storing it to memory), there is no one-to-one -correspondence between them. - -The media bus pixel codes document parallel formats. Should the pixel data be -transported over a serial bus, the media bus pixel code that describes a -parallel format that transfers a sample on a single clock cycle is used. For -instance, both MEDIA_BUS_FMT_BGR888_1X24 and MEDIA_BUS_FMT_BGR888_3X8 are used -on parallel busses for transferring an 8 bits per sample BGR data, whereas on -serial busses the data in this format is only referred to using -MEDIA_BUS_FMT_BGR888_1X24. This is because there is effectively only a single -way to transport that format on the serial busses. - -Packed RGB Formats -^^^^^^^^^^^^^^^^^^ - -Those formats transfer pixel data as red, green and blue components. The -format code is made of the following information. - -- The red, green and blue components order code, as encoded in a pixel - sample. Possible values are RGB and BGR. - -- The number of bits per component, for each component. The values can - be different for all components. Common values are 555 and 565. - -- The number of bus samples per pixel. Pixels that are wider than the - bus width must be transferred in multiple samples. Common values are - 1 and 2. - -- The bus width. - -- For formats where the total number of bits per pixel is smaller than - the number of bus samples per pixel times the bus width, a padding - value stating if the bytes are padded in their most high order bits - (PADHI) or low order bits (PADLO). A "C" prefix is used for - component-wise padding in the most high order bits (CPADHI) or low - order bits (CPADLO) of each separate component. - -- For formats where the number of bus samples per pixel is larger than - 1, an endianness value stating if the pixel is transferred MSB first - (BE) or LSB first (LE). - -For instance, a format where pixels are encoded as 5-bits red, 5-bits -green and 5-bit blue values padded on the high bit, transferred as 2 -8-bit samples per pixel with the most significant bits (padding, red and -half of the green value) transferred first will be named -``MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE``. - -The following tables list existing packed RGB formats. - -.. HACK: ideally, we would be using adjustbox here. However, Sphinx -.. is a very bad behaviored guy: if the table has more than 30 cols, -.. it switches to long table, and there's no way to override it. - - -.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-rgb: - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. flat-table:: RGB formats - :header-rows: 2 - :stub-columns: 0 - :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 - - * - Identifier - - Code - - - - :cspan:`31` Data organization - * - - - - - Bit - - 31 - - 30 - - 29 - - 28 - - 27 - - 26 - - 25 - - 24 - - 23 - - 22 - - 21 - - 20 - - 19 - - 18 - - 17 - - 16 - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-RGB444-1X12: - - - MEDIA_BUS_FMT_RGB444_1X12 - - 0x1016 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB444-2X8-PADHI-BE: - - - MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE - - 0x1001 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 - - 0 - - 0 - - 0 - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB444-2X8-PADHI-LE: - - - MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE - - 0x1002 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 - - 0 - - 0 - - 0 - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB555-2X8-PADHI-BE: - - - MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE - - 0x1003 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB555-2X8-PADHI-LE: - - - MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE - - 0x1004 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`4` - - g\ :sub:`3` - * .. _MEDIA-BUS-FMT-RGB565-1X16: - - - MEDIA_BUS_FMT_RGB565_1X16 - - 0x1017 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-BGR565-2X8-BE: - - - MEDIA_BUS_FMT_BGR565_2X8_BE - - 0x1005 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-BGR565-2X8-LE: - - - MEDIA_BUS_FMT_BGR565_2X8_LE - - 0x1006 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - * .. _MEDIA-BUS-FMT-RGB565-2X8-BE: - - - MEDIA_BUS_FMT_RGB565_2X8_BE - - 0x1007 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB565-2X8-LE: - - - MEDIA_BUS_FMT_RGB565_2X8_LE - - 0x1008 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - * .. _MEDIA-BUS-FMT-RGB666-1X18: - - - MEDIA_BUS_FMT_RGB666_1X18 - - 0x1009 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-RBG888-1X24: - - - MEDIA_BUS_FMT_RBG888_1X24 - - 0x100e - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB666-1X24_CPADHI: - - - MEDIA_BUS_FMT_RGB666_1X24_CPADHI - - 0x1015 - - - - - - - - - - - - - - - - - - - - 0 - - 0 - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - 0 - - 0 - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - 0 - - 0 - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-BGR888-1X24: - - - MEDIA_BUS_FMT_BGR888_1X24 - - 0x1013 - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-BGR888-3X8: - - - MEDIA_BUS_FMT_BGR888_3X8 - - 0x101b - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-GBR888-1X24: - - - MEDIA_BUS_FMT_GBR888_1X24 - - 0x1014 - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - 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- r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB888-2X12-LE: - - - MEDIA_BUS_FMT_RGB888_2X12_LE - - 0x100c - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - * .. _MEDIA-BUS-FMT-RGB888-3X8: - - - MEDIA_BUS_FMT_RGB888_3X8 - - 0x101c - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-ARGB888-1X32: - - - MEDIA_BUS_FMT_ARGB888_1X32 - - 0x100d - - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - 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- 0x1018 - - - - 0 - - 0 - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - -.. raw:: latex - - \endgroup - - -The following table list existing packed 36bit wide RGB formats. - -.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-rgb-36: - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. flat-table:: 36bit RGB formats - :header-rows: 2 - :stub-columns: 0 - :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 - - * - Identifier - - Code - - - - :cspan:`35` Data organization - * - - - - - Bit - - 35 - - 34 - - 33 - - 32 - - 31 - - 30 - - 29 - - 28 - - 27 - - 26 - - 25 - - 24 - - 23 - - 22 - - 21 - - 20 - - 19 - - 18 - - 17 - - 16 - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-RGB121212-1X36: - - - MEDIA_BUS_FMT_RGB121212_1X36 - - 0x1019 - - - - r\ :sub:`11` - - r\ :sub:`10` - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`11` - - b\ :sub:`10` - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - -.. raw:: latex - - \endgroup - - -The following table list existing packed 48bit wide RGB formats. - -.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-rgb-48: - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. flat-table:: 48bit RGB formats - :header-rows: 3 - :stub-columns: 0 - :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 - - * - Identifier - - Code - - - - :cspan:`31` Data organization - * - - - - - Bit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47 - - 46 - - 45 - - 44 - - 43 - - 42 - - 41 - - 40 - - 39 - - 38 - - 37 - - 36 - - 35 - - 34 - - 33 - - 32 - * - - - - - - - 31 - - 30 - - 29 - - 28 - - 27 - - 26 - - 25 - - 24 - - 23 - - 22 - - 21 - - 20 - - 19 - - 18 - - 17 - - 16 - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-RGB161616-1X48: - - - MEDIA_BUS_FMT_RGB161616_1X48 - - 0x101a - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - r\ :sub:`15` - - r\ :sub:`14` - - r\ :sub:`13` - - r\ :sub:`12` - - r\ :sub:`11` - - r\ :sub:`10` - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * - - - - - - - g\ :sub:`15` - - g\ :sub:`14` - - g\ :sub:`13` - - g\ :sub:`12` - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - - b\ :sub:`15` - - b\ :sub:`14` - - b\ :sub:`13` - - b\ :sub:`12` - - b\ :sub:`11` - - b\ :sub:`10` - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - -.. raw:: latex - - \endgroup - -On LVDS buses, usually each sample is transferred serialized in seven -time slots per pixel clock, on three (18-bit) or four (24-bit) -differential data pairs at the same time. The remaining bits are used -for control signals as defined by SPWG/PSWG/VESA or JEIDA standards. The -24-bit RGB format serialized in seven time slots on four lanes using -JEIDA defined bit mapping will be named -``MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA``, for example. - -.. raw:: latex - - \tiny - -.. _v4l2-mbus-pixelcode-rgb-lvds: - -.. flat-table:: LVDS RGB formats - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - - - - - :cspan:`3` Data organization - * - - - - - Timeslot - - Lane - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-RGB666-1X7X3-SPWG: - - - MEDIA_BUS_FMT_RGB666_1X7X3_SPWG - - 0x1010 - - 0 - - - - - - d - - b\ :sub:`1` - - g\ :sub:`0` - * - - - - - 1 - - - - - - d - - b\ :sub:`0` - - r\ :sub:`5` - * - - - - - 2 - - - - - - d - - g\ :sub:`5` - - r\ :sub:`4` - * - - - - - 3 - - - - - - b\ :sub:`5` - - g\ :sub:`4` - - r\ :sub:`3` - * - - - - - 4 - - - - - - b\ :sub:`4` - - g\ :sub:`3` - - r\ :sub:`2` - * - - - - - 5 - - - - - - b\ :sub:`3` - - g\ :sub:`2` - - r\ :sub:`1` - * - - - - - 6 - - - - - - b\ :sub:`2` - - g\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB888-1X7X4-SPWG: - - - MEDIA_BUS_FMT_RGB888_1X7X4_SPWG - - 0x1011 - - 0 - - - - d - - d - - b\ :sub:`1` - - g\ :sub:`0` - * - - - - - 1 - - - - b\ :sub:`7` - - d - - b\ :sub:`0` - - r\ :sub:`5` - * - - - - - 2 - - - - b\ :sub:`6` - - d - - g\ :sub:`5` - - r\ :sub:`4` - * - - - - - 3 - - - - g\ :sub:`7` - - b\ :sub:`5` - - g\ :sub:`4` - - r\ :sub:`3` - * - - - - - 4 - - - - g\ :sub:`6` - - b\ :sub:`4` - - g\ :sub:`3` - - r\ :sub:`2` - * - - - - - 5 - - - - r\ :sub:`7` - - b\ :sub:`3` - - g\ :sub:`2` - - r\ :sub:`1` - * - - - - - 6 - - - - r\ :sub:`6` - - b\ :sub:`2` - - g\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-RGB888-1X7X4-JEIDA: - - - MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA - - 0x1012 - - 0 - - - - d - - d - - b\ :sub:`3` - - g\ :sub:`2` - * - - - - - 1 - - - - b\ :sub:`1` - - d - - b\ :sub:`2` - - r\ :sub:`7` - * - - - - - 2 - - - - b\ :sub:`0` - - d - - g\ :sub:`7` - - r\ :sub:`6` - * - - - - - 3 - - - - g\ :sub:`1` - - b\ :sub:`7` - - g\ :sub:`6` - - r\ :sub:`5` - * - - - - - 4 - - - - g\ :sub:`0` - - b\ :sub:`6` - - g\ :sub:`5` - - r\ :sub:`4` - * - - - - - 5 - - - - r\ :sub:`1` - - b\ :sub:`5` - - g\ :sub:`4` - - r\ :sub:`3` - * - - - - - 6 - - - - r\ :sub:`0` - - b\ :sub:`4` - - g\ :sub:`3` - - r\ :sub:`2` - -.. raw:: latex - - \normalsize - - -Bayer Formats -^^^^^^^^^^^^^ - -Those formats transfer pixel data as red, green and blue components. The -format code is made of the following information. - -- The red, green and blue components order code, as encoded in a pixel - sample. The possible values are shown in :ref:`bayer-patterns`. - -- The number of bits per pixel component. All components are - transferred on the same number of bits. Common values are 8, 10 and - 12. - -- The compression (optional). If the pixel components are ALAW- or - DPCM-compressed, a mention of the compression scheme and the number - of bits per compressed pixel component. - -- The number of bus samples per pixel. Pixels that are wider than the - bus width must be transferred in multiple samples. Common values are - 1 and 2. - -- The bus width. - -- For formats where the total number of bits per pixel is smaller than - the number of bus samples per pixel times the bus width, a padding - value stating if the bytes are padded in their most high order bits - (PADHI) or low order bits (PADLO). - -- For formats where the number of bus samples per pixel is larger than - 1, an endianness value stating if the pixel is transferred MSB first - (BE) or LSB first (LE). - -For instance, a format with uncompressed 10-bit Bayer components -arranged in a red, green, green, blue pattern transferred as 2 8-bit -samples per pixel with the least significant bits transferred first will -be named ``MEDIA_BUS_FMT_SRGGB10_2X8_PADHI_LE``. - - -.. _bayer-patterns: - -.. kernel-figure:: bayer.svg - :alt: bayer.svg - :align: center - - **Figure 4.8 Bayer Patterns** - -The following table lists existing packed Bayer formats. The data -organization is given as an example for the first pixel only. - - -.. HACK: ideally, we would be using adjustbox here. However, Sphinx -.. is a very bad behaviored guy: if the table has more than 30 cols, -.. it switches to long table, and there's no way to override it. - - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.3cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-bayer: - -.. cssclass: longtable - -.. flat-table:: Bayer Formats - :header-rows: 2 - :stub-columns: 0 - - * - Identifier - - Code - - - - :cspan:`15` Data organization - * - - - - - Bit - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-SBGGR8-1X8: - - - MEDIA_BUS_FMT_SBGGR8_1X8 - - 0x3001 - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG8-1X8: - - - MEDIA_BUS_FMT_SGBRG8_1X8 - - 0x3013 - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG8-1X8: - - - MEDIA_BUS_FMT_SGRBG8_1X8 - - 0x3002 - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB8-1X8: - - - MEDIA_BUS_FMT_SRGGB8_1X8 - - 0x3014 - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR10-ALAW8-1X8: - - - MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8 - - 0x3015 - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG10-ALAW8-1X8: - - - MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8 - - 0x3016 - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG10-ALAW8-1X8: - - - MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8 - - 0x3017 - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB10-ALAW8-1X8: - - - MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8 - - 0x3018 - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR10-DPCM8-1X8: - - - MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8 - - 0x300b - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG10-DPCM8-1X8: - - - MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8 - - 0x300c - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG10-DPCM8-1X8: - - - MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8 - - 0x3009 - - - - - - - - - - - - - - - - - - - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB10-DPCM8-1X8: - - - MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8 - - 0x300d - - - - - - - - - - - - - - - - - - - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADHI-BE: - - - MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE - - 0x3003 - - - - - - - - - - - - - - - - - - - - 0 - - 0 - - 0 - - 0 - - 0 - - 0 - - b\ :sub:`9` - - b\ :sub:`8` - * - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADHI-LE: - - - MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE - - 0x3004 - - - - - - - - - - - - - - - - - - - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - 0 - - 0 - - 0 - - 0 - - 0 - - 0 - - b\ :sub:`9` - - b\ :sub:`8` - * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADLO-BE: - - - MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE - - 0x3005 - - - - - - - - - - - - - - - - - - - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - * - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`1` - - b\ :sub:`0` - - 0 - - 0 - - 0 - - 0 - - 0 - - 0 - * .. _MEDIA-BUS-FMT-SBGGR10-2X8-PADLO-LE: - - - MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE - - 0x3006 - - - - - - - - - - - - - - - - - - - - b\ :sub:`1` - - b\ :sub:`0` - - 0 - - 0 - - 0 - - 0 - - 0 - - 0 - * - - - - - - - - - - - - - - - - - - - - - - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - * .. _MEDIA-BUS-FMT-SBGGR10-1X10: - - - MEDIA_BUS_FMT_SBGGR10_1X10 - - 0x3007 - - - - - - - - - - - - - - - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG10-1X10: - - - MEDIA_BUS_FMT_SGBRG10_1X10 - - 0x300e - - - - - - - - - - - - - - - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG10-1X10: - - - MEDIA_BUS_FMT_SGRBG10_1X10 - - 0x300a - - - - - - - - - - - - - - - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB10-1X10: - - - MEDIA_BUS_FMT_SRGGB10_1X10 - - 0x300f - - - - - - - - - - - - - - - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR12-1X12: - - - MEDIA_BUS_FMT_SBGGR12_1X12 - - 0x3008 - - - - - - - - - - - - b\ :sub:`11` - - b\ :sub:`10` - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG12-1X12: - - - MEDIA_BUS_FMT_SGBRG12_1X12 - - 0x3010 - - - - - - - - - - - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG12-1X12: - - - MEDIA_BUS_FMT_SGRBG12_1X12 - - 0x3011 - - - - - - - - - - - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB12-1X12: - - - MEDIA_BUS_FMT_SRGGB12_1X12 - - 0x3012 - - - - - - - - - - - - r\ :sub:`11` - - r\ :sub:`10` - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR14-1X14: - - - MEDIA_BUS_FMT_SBGGR14_1X14 - - 0x3019 - - - - - - - - b\ :sub:`13` - - b\ :sub:`12` - - b\ :sub:`11` - - b\ :sub:`10` - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG14-1X14: - - - MEDIA_BUS_FMT_SGBRG14_1X14 - - 0x301a - - - - - - - - g\ :sub:`13` - - g\ :sub:`12` - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG14-1X14: - - - MEDIA_BUS_FMT_SGRBG14_1X14 - - 0x301b - - - - - - - - g\ :sub:`13` - - g\ :sub:`12` - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB14-1X14: - - - MEDIA_BUS_FMT_SRGGB14_1X14 - - 0x301c - - - - - - - - r\ :sub:`13` - - r\ :sub:`12` - - r\ :sub:`11` - - r\ :sub:`10` - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - * .. _MEDIA-BUS-FMT-SBGGR16-1X16: - - - MEDIA_BUS_FMT_SBGGR16_1X16 - - 0x301d - - - - b\ :sub:`15` - - b\ :sub:`14` - - b\ :sub:`13` - - b\ :sub:`12` - - b\ :sub:`11` - - b\ :sub:`10` - - b\ :sub:`9` - - b\ :sub:`8` - - b\ :sub:`7` - - b\ :sub:`6` - - b\ :sub:`5` - - b\ :sub:`4` - - b\ :sub:`3` - - b\ :sub:`2` - - b\ :sub:`1` - - b\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGBRG16-1X16: - - - MEDIA_BUS_FMT_SGBRG16_1X16 - - 0x301e - - - - g\ :sub:`15` - - g\ :sub:`14` - - g\ :sub:`13` - - g\ :sub:`12` - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SGRBG16-1X16: - - - MEDIA_BUS_FMT_SGRBG16_1X16 - - 0x301f - - - - g\ :sub:`15` - - g\ :sub:`14` - - g\ :sub:`13` - - g\ :sub:`12` - - g\ :sub:`11` - - g\ :sub:`10` - - g\ :sub:`9` - - g\ :sub:`8` - - g\ :sub:`7` - - g\ :sub:`6` - - g\ :sub:`5` - - g\ :sub:`4` - - g\ :sub:`3` - - g\ :sub:`2` - - g\ :sub:`1` - - g\ :sub:`0` - * .. _MEDIA-BUS-FMT-SRGGB16-1X16: - - - MEDIA_BUS_FMT_SRGGB16_1X16 - - 0x3020 - - - - r\ :sub:`15` - - r\ :sub:`14` - - r\ :sub:`13` - - r\ :sub:`12` - - r\ :sub:`11` - - r\ :sub:`10` - - r\ :sub:`9` - - r\ :sub:`8` - - r\ :sub:`7` - - r\ :sub:`6` - - r\ :sub:`5` - - r\ :sub:`4` - - r\ :sub:`3` - - r\ :sub:`2` - - r\ :sub:`1` - - r\ :sub:`0` - -.. raw:: latex - - \endgroup - - -Packed YUV Formats -^^^^^^^^^^^^^^^^^^ - -Those data formats transfer pixel data as (possibly downsampled) Y, U -and V components. Some formats include dummy bits in some of their -samples and are collectively referred to as "YDYC" (Y-Dummy-Y-Chroma) -formats. One cannot rely on the values of these dummy bits as those are -undefined. - -The format code is made of the following information. - -- The Y, U and V components order code, as transferred on the bus. - Possible values are YUYV, UYVY, YVYU and VYUY for formats with no - dummy bit, and YDYUYDYV, YDYVYDYU, YUYDYVYD and YVYDYUYD for YDYC - formats. - -- The number of bits per pixel component. All components are - transferred on the same number of bits. Common values are 8, 10 and - 12. - -- The number of bus samples per pixel. Pixels that are wider than the - bus width must be transferred in multiple samples. Common values are - 0.5 (encoded as 0_5; in this case two pixels are transferred per bus - sample), 1, 1.5 (encoded as 1_5) and 2. - -- The bus width. When the bus width is larger than the number of bits - per pixel component, several components are packed in a single bus - sample. The components are ordered as specified by the order code, - with components on the left of the code transferred in the high order - bits. Common values are 8 and 16. - -For instance, a format where pixels are encoded as 8-bit YUV values -downsampled to 4:2:2 and transferred as 2 8-bit bus samples per pixel in -the U, Y, V, Y order will be named ``MEDIA_BUS_FMT_UYVY8_2X8``. - -:ref:`v4l2-mbus-pixelcode-yuv8` lists existing packed YUV formats and -describes the organization of each pixel data in each sample. When a -format pattern is split across multiple samples each of the samples in -the pattern is described. - -The role of each bit transferred over the bus is identified by one of -the following codes. - -- y\ :sub:`x` for luma component bit number x - -- u\ :sub:`x` for blue chroma component bit number x - -- v\ :sub:`x` for red chroma component bit number x - -- a\ :sub:`x` for alpha component bit number x - -- for non-available bits (for positions higher than the bus width) - -- d for dummy bits - -.. HACK: ideally, we would be using adjustbox here. However, this -.. will never work for this table, as, even with tiny font, it is -.. to big for a single page. So, we need to manually adjust the -.. size. - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-yuv8: - -.. flat-table:: YUV Formats - :header-rows: 2 - :stub-columns: 0 - :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 - - * - Identifier - - Code - - - - :cspan:`31` Data organization - * - - - - - Bit - - 31 - - 30 - - 29 - - 28 - - 27 - - 26 - - 25 - - 24 - - 23 - - 22 - - 21 - - 10 - - 19 - - 18 - - 17 - - 16 - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-Y8-1X8: - - - MEDIA_BUS_FMT_Y8_1X8 - - 0x2001 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-UV8-1X8: - - - MEDIA_BUS_FMT_UV8_1X8 - - 0x2015 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYVY8-1_5X8: - - - MEDIA_BUS_FMT_UYVY8_1_5X8 - - 0x2002 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY8-1_5X8: - - - MEDIA_BUS_FMT_VYUY8_1_5X8 - - 0x2003 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV8-1_5X8: - - - MEDIA_BUS_FMT_YUYV8_1_5X8 - - 0x2004 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-YVYU8-1_5X8: - - - MEDIA_BUS_FMT_YVYU8_1_5X8 - - 0x2005 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYVY8-2X8: - - - MEDIA_BUS_FMT_UYVY8_2X8 - - 0x2006 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY8-2X8: - - - MEDIA_BUS_FMT_VYUY8_2X8 - - 0x2007 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV8-2X8: - - - MEDIA_BUS_FMT_YUYV8_2X8 - - 0x2008 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-YVYU8-2X8: - - - MEDIA_BUS_FMT_YVYU8_2X8 - - 0x2009 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * .. _MEDIA-BUS-FMT-Y10-1X10: - - - MEDIA_BUS_FMT_Y10_1X10 - - 0x200a - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-Y10-2X8-PADHI_LE: - - - MEDIA_BUS_FMT_Y10_2X8_PADHI_LE - - 0x202c - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 0 - - 0 - - 0 - - 0 - - 0 - - 0 - - y\ :sub:`9` - - y\ :sub:`8` - * .. _MEDIA-BUS-FMT-UYVY10-2X10: - - - MEDIA_BUS_FMT_UYVY10_2X10 - - 0x2018 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY10-2X10: - - - MEDIA_BUS_FMT_VYUY10_2X10 - - 0x2019 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV10-2X10: - - - MEDIA_BUS_FMT_YUYV10_2X10 - - 0x200b - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-YVYU10-2X10: - - - MEDIA_BUS_FMT_YVYU10_2X10 - - 0x200c - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * .. _MEDIA-BUS-FMT-Y12-1X12: - - - MEDIA_BUS_FMT_Y12_1X12 - - 0x2013 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYVY12-2X12: - - - MEDIA_BUS_FMT_UYVY12_2X12 - - 0x201c - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY12-2X12: - - - MEDIA_BUS_FMT_VYUY12_2X12 - - 0x201d - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV12-2X12: - - - MEDIA_BUS_FMT_YUYV12_2X12 - - 0x201e - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-YVYU12-2X12: - - - MEDIA_BUS_FMT_YVYU12_2X12 - - 0x201f - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * .. _MEDIA-BUS-FMT-Y14-1X14: - - - MEDIA_BUS_FMT_Y14_1X14 - - 0x202d - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`13` - - y\ :sub:`12` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYVY8-1X16: - - - MEDIA_BUS_FMT_UYVY8_1X16 - - 0x200f - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY8-1X16: - - - MEDIA_BUS_FMT_VYUY8_1X16 - - 0x2010 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV8-1X16: - - - MEDIA_BUS_FMT_YUYV8_1X16 - - 0x2011 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-YVYU8-1X16: - - - MEDIA_BUS_FMT_YVYU8_1X16 - - 0x2012 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * .. _MEDIA-BUS-FMT-YDYUYDYV8-1X16: - - - MEDIA_BUS_FMT_YDYUYDYV8_1X16 - - 0x2014 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - d - - d - - d - - d - - d - - d - - d - - d - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - d - - d - - d - - d - - d - - d - - d - - d - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYVY10-1X20: - - - MEDIA_BUS_FMT_UYVY10_1X20 - - 0x201a - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY10-1X20: - - - MEDIA_BUS_FMT_VYUY10_1X20 - - 0x201b - - - - - - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV10-1X20: - - - MEDIA_BUS_FMT_YUYV10_1X20 - - 0x200d - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-YVYU10-1X20: - - - MEDIA_BUS_FMT_YVYU10_1X20 - - 0x200e - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * .. _MEDIA-BUS-FMT-VUY8-1X24: - - - MEDIA_BUS_FMT_VUY8_1X24 - - 0x201a - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUV8-1X24: - - - MEDIA_BUS_FMT_YUV8_1X24 - - 0x2025 - - - - - - - - - - - - - - - - - - - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYYVYY8-0-5X24: - - - MEDIA_BUS_FMT_UYYVYY8_0_5X24 - - 0x2026 - - - - - - - - - - - - - - - - - - - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYVY12-1X24: - - - MEDIA_BUS_FMT_UYVY12_1X24 - - 0x2020 - - - - - - - - - - - - - - - - - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-VYUY12-1X24: - - - MEDIA_BUS_FMT_VYUY12_1X24 - - 0x2021 - - - - - - - - - - - - - - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUYV12-1X24: - - - MEDIA_BUS_FMT_YUYV12_1X24 - - 0x2022 - - - - - - - - - - - - - - - - - - - - y\ :sub:`11` - 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- u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYYVYY10-0-5X30: - - - MEDIA_BUS_FMT_UYYVYY10_0_5X30 - - 0x2027 - - - - - - - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - - - - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-AYUV8-1X32: - - - MEDIA_BUS_FMT_AYUV8_1X32 - - 0x2017 - - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - -.. raw:: latex - - \endgroup - 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- 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-UYYVYY12-0-5X36: - - - MEDIA_BUS_FMT_UYYVYY12_0_5X36 - - 0x2028 - - - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * .. _MEDIA-BUS-FMT-YUV12-1X36: - - - MEDIA_BUS_FMT_YUV12_1X36 - - 0x2029 - - - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - - -.. raw:: latex - - \endgroup - - -The following table list existing packed 48bit wide YUV formats. - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{4.0cm}|p{0.7cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-yuv8-48bit: - -.. flat-table:: 48bit YUV Formats - :header-rows: 3 - :stub-columns: 0 - :widths: 36 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 - - * - Identifier - - Code - - - - :cspan:`31` Data organization - * - - - - - Bit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47 - - 46 - - 45 - - 44 - - 43 - - 42 - - 41 - - 40 - - 39 - - 38 - - 37 - - 36 - - 35 - - 34 - - 33 - - 32 - * - - - - - - - 31 - - 30 - - 29 - - 28 - - 27 - - 26 - - 25 - - 24 - - 23 - - 22 - - 21 - - 10 - - 19 - - 18 - - 17 - - 16 - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-YUV16-1X48: - - - MEDIA_BUS_FMT_YUV16_1X48 - - 0x202a - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - y\ :sub:`15` - - y\ :sub:`14` - - y\ :sub:`13` - - y\ :sub:`12` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`8` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - * - - - - - - - u\ :sub:`15` - - u\ :sub:`14` - - u\ :sub:`13` - - u\ :sub:`12` - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - - v\ :sub:`15` - - v\ :sub:`14` - - v\ :sub:`13` - - v\ :sub:`12` - - v\ :sub:`11` - - v\ :sub:`10` - - v\ :sub:`9` - - v\ :sub:`8` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - * .. _MEDIA-BUS-FMT-UYYVYY16-0-5X48: - - - MEDIA_BUS_FMT_UYYVYY16_0_5X48 - - 0x202b - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - u\ :sub:`15` - - u\ :sub:`14` - - u\ :sub:`13` - - u\ :sub:`12` - - u\ :sub:`11` - - u\ :sub:`10` - - u\ :sub:`9` - - u\ :sub:`8` - - u\ :sub:`7` - - u\ :sub:`6` - - u\ :sub:`5` - - u\ :sub:`4` - - u\ :sub:`3` - - u\ :sub:`2` - - u\ :sub:`1` - - u\ :sub:`0` - * - - - - - - - y\ :sub:`15` - - y\ :sub:`14` - - y\ :sub:`13` - - y\ :sub:`12` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`9` - - y\ :sub:`8` - - y\ :sub:`7` - - y\ :sub:`6` - - y\ :sub:`5` - - y\ :sub:`4` - - y\ :sub:`3` - - y\ :sub:`2` - - y\ :sub:`1` - - y\ :sub:`0` - - y\ :sub:`15` - - y\ :sub:`14` - - y\ :sub:`13` - - y\ :sub:`12` - - y\ :sub:`11` - - y\ :sub:`10` - - y\ :sub:`8` - - y\ :sub:`8` - - y\ :sub:`7` - 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- \endgroup - -HSV/HSL Formats -^^^^^^^^^^^^^^^ - -Those formats transfer pixel data as RGB values in a -cylindrical-coordinate system using Hue-Saturation-Value or -Hue-Saturation-Lightness components. The format code is made of the -following information. - -- The hue, saturation, value or lightness and optional alpha components - order code, as encoded in a pixel sample. The only currently - supported value is AHSV. - -- The number of bits per component, for each component. The values can - be different for all components. The only currently supported value - is 8888. - -- The number of bus samples per pixel. Pixels that are wider than the - bus width must be transferred in multiple samples. The only currently - supported value is 1. - -- The bus width. - -- For formats where the total number of bits per pixel is smaller than - the number of bus samples per pixel times the bus width, a padding - value stating if the bytes are padded in their most high order bits - (PADHI) or low order bits (PADLO). - -- For formats where the number of bus samples per pixel is larger than - 1, an endianness value stating if the pixel is transferred MSB first - (BE) or LSB first (LE). - -The following table lists existing HSV/HSL formats. - - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. tabularcolumns:: |p{3.9cm}|p{0.73cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| - -.. _v4l2-mbus-pixelcode-hsv: - -.. flat-table:: HSV/HSL formats - :header-rows: 2 - :stub-columns: 0 - :widths: 28 7 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 - - * - Identifier - - Code - - - - :cspan:`31` Data organization - * - - - - - Bit - - 31 - - 30 - - 29 - - 28 - - 27 - - 26 - - 25 - - 24 - - 23 - - 22 - - 21 - - 20 - - 19 - - 18 - - 17 - - 16 - - 15 - - 14 - - 13 - - 12 - - 11 - - 10 - - 9 - - 8 - - 7 - - 6 - - 5 - - 4 - - 3 - - 2 - - 1 - - 0 - * .. _MEDIA-BUS-FMT-AHSV8888-1X32: - - - MEDIA_BUS_FMT_AHSV8888_1X32 - - 0x6001 - - - - a\ :sub:`7` - - a\ :sub:`6` - - a\ :sub:`5` - - a\ :sub:`4` - - a\ :sub:`3` - - a\ :sub:`2` - - a\ :sub:`1` - - a\ :sub:`0` - - h\ :sub:`7` - - h\ :sub:`6` - - h\ :sub:`5` - - h\ :sub:`4` - - h\ :sub:`3` - - h\ :sub:`2` - - h\ :sub:`1` - - h\ :sub:`0` - - s\ :sub:`7` - - s\ :sub:`6` - - s\ :sub:`5` - - s\ :sub:`4` - - s\ :sub:`3` - - s\ :sub:`2` - - s\ :sub:`1` - - s\ :sub:`0` - - v\ :sub:`7` - - v\ :sub:`6` - - v\ :sub:`5` - - v\ :sub:`4` - - v\ :sub:`3` - - v\ :sub:`2` - - v\ :sub:`1` - - v\ :sub:`0` - -.. raw:: latex - - \normalsize - - -JPEG Compressed Formats -^^^^^^^^^^^^^^^^^^^^^^^ - -Those data formats consist of an ordered sequence of 8-bit bytes -obtained from JPEG compression process. Additionally to the ``_JPEG`` -postfix the format code is made of the following information. - -- The number of bus samples per entropy encoded byte. - -- The bus width. - -For instance, for a JPEG baseline process and an 8-bit bus width the -format will be named ``MEDIA_BUS_FMT_JPEG_1X8``. - -The following table lists existing JPEG compressed formats. - - -.. _v4l2-mbus-pixelcode-jpeg: - -.. tabularcolumns:: |p{6.0cm}|p{1.4cm}|p{10.1cm}| - -.. flat-table:: JPEG Formats - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Code - - Remarks - * .. _MEDIA-BUS-FMT-JPEG-1X8: - - - MEDIA_BUS_FMT_JPEG_1X8 - - 0x4001 - - Besides of its usage for the parallel bus this format is - recommended for transmission of JPEG data over MIPI CSI bus using - the User Defined 8-bit Data types. - - - -.. _v4l2-mbus-vendor-spec-fmts: - -Vendor and Device Specific Formats -^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -This section lists complex data formats that are either vendor or device -specific. - -The following table lists the existing vendor and device specific -formats. - - -.. _v4l2-mbus-pixelcode-vendor-specific: - -.. tabularcolumns:: |p{8.0cm}|p{1.4cm}|p{7.7cm}| - -.. flat-table:: Vendor and device specific formats - :header-rows: 1 - :stub-columns: 0 - - * - Identifier - - Code - - Comments - * .. _MEDIA-BUS-FMT-S5C-UYVY-JPEG-1X8: - - - MEDIA_BUS_FMT_S5C_UYVY_JPEG_1X8 - - 0x5001 - - Interleaved raw UYVY and JPEG image format with embedded meta-data - used by Samsung S3C73MX camera sensors. diff --git a/Documentation/media/uapi/v4l/subdev-image-processing-crop.svg b/Documentation/media/uapi/v4l/subdev-image-processing-crop.svg deleted file mode 100644 index 59321e09929d..000000000000 --- a/Documentation/media/uapi/v4l/subdev-image-processing-crop.svg +++ /dev/null @@ -1,312 +0,0 @@ -<?xml version="1.0" encoding="UTF-8" standalone="no"?> -<!-- - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _tch-formats: - -************* -Touch Formats -************* - -These formats are used for :ref:`touch` interface only. - - -.. toctree:: - :maxdepth: 1 - - pixfmt-tch-td16 - pixfmt-tch-td08 - pixfmt-tch-tu16 - pixfmt-tch-tu08 diff --git a/Documentation/media/uapi/v4l/tuner.rst b/Documentation/media/uapi/v4l/tuner.rst deleted file mode 100644 index 601dc535199c..000000000000 --- a/Documentation/media/uapi/v4l/tuner.rst +++ /dev/null @@ -1,92 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _tuner: - -********************* -Tuners and Modulators -********************* - - -Tuners -====== - -Video input devices can have one or more tuners demodulating a RF -signal. Each tuner is associated with one or more video inputs, -depending on the number of RF connectors on the tuner. The ``type`` -field of the respective struct :c:type:`v4l2_input` -returned by the :ref:`VIDIOC_ENUMINPUT` ioctl is -set to ``V4L2_INPUT_TYPE_TUNER`` and its ``tuner`` field contains the -index number of the tuner. - -Radio input devices have exactly one tuner with index zero, no video -inputs. - -To query and change tuner properties applications use the -:ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` and -:ref:`VIDIOC_S_TUNER <VIDIOC_G_TUNER>` ioctls, respectively. The -struct :c:type:`v4l2_tuner` returned by :ref:`VIDIOC_G_TUNER <VIDIOC_G_TUNER>` -also contains signal status information applicable when the tuner of the -current video or radio input is queried. - -.. note:: - - :ref:`VIDIOC_S_TUNER <VIDIOC_G_TUNER>` does not switch the - current tuner, when there is more than one. The tuner is solely - determined by the current video input. Drivers must support both ioctls - and set the ``V4L2_CAP_TUNER`` flag in the struct :c:type:`v4l2_capability` - returned by the :ref:`VIDIOC_QUERYCAP` ioctl when the - device has one or more tuners. - - -Modulators -========== - -Video output devices can have one or more modulators, that modulate a -video signal for radiation or connection to the antenna input of a TV -set or video recorder. Each modulator is associated with one or more -video outputs, depending on the number of RF connectors on the -modulator. The ``type`` field of the respective struct -:c:type:`v4l2_output` returned by the -:ref:`VIDIOC_ENUMOUTPUT` ioctl is set to -``V4L2_OUTPUT_TYPE_MODULATOR`` and its ``modulator`` field contains the -index number of the modulator. - -Radio output devices have exactly one modulator with index zero, no -video outputs. - -A video or radio device cannot support both a tuner and a modulator. Two -separate device nodes will have to be used for such hardware, one that -supports the tuner functionality and one that supports the modulator -functionality. The reason is a limitation with the -:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl where you -cannot specify whether the frequency is for a tuner or a modulator. - -To query and change modulator properties applications use the -:ref:`VIDIOC_G_MODULATOR <VIDIOC_G_MODULATOR>` and -:ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl. Note that -:ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` does not switch the current modulator, when there -is more than one at all. The modulator is solely determined by the -current video output. Drivers must support both ioctls and set the -``V4L2_CAP_MODULATOR`` flag in the struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl when the device has -one or more modulators. - - -Radio Frequency -=============== - -To get and set the tuner or modulator radio frequency applications use -the :ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` and -:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl which both take -a pointer to a struct :c:type:`v4l2_frequency`. These -ioctls are used for TV and radio devices alike. Drivers must support -both ioctls when the tuner or modulator ioctls are supported, or when -the device is a radio device. diff --git a/Documentation/media/uapi/v4l/user-func.rst b/Documentation/media/uapi/v4l/user-func.rst deleted file mode 100644 index ca0ef21d77fe..000000000000 --- a/Documentation/media/uapi/v4l/user-func.rst +++ /dev/null @@ -1,88 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _user-func: - -****************** -Function Reference -****************** - - -.. toctree:: - :maxdepth: 1 - - func-close - func-ioctl - vidioc-create-bufs - vidioc-cropcap - vidioc-dbg-g-chip-info - vidioc-dbg-g-register - vidioc-decoder-cmd - vidioc-dqevent - vidioc-dv-timings-cap - vidioc-encoder-cmd - vidioc-enumaudio - vidioc-enumaudioout - vidioc-enum-dv-timings - vidioc-enum-fmt - vidioc-enum-framesizes - vidioc-enum-frameintervals - vidioc-enum-freq-bands - vidioc-enuminput - vidioc-enumoutput - vidioc-enumstd - vidioc-expbuf - vidioc-g-audio - vidioc-g-audioout - vidioc-g-crop - vidioc-g-ctrl - vidioc-g-dv-timings - vidioc-g-edid - vidioc-g-enc-index - vidioc-g-ext-ctrls - vidioc-g-fbuf - vidioc-g-fmt - vidioc-g-frequency - vidioc-g-input - vidioc-g-jpegcomp - vidioc-g-modulator - vidioc-g-output - vidioc-g-parm - vidioc-g-priority - vidioc-g-selection - vidioc-g-sliced-vbi-cap - vidioc-g-std - vidioc-g-tuner - vidioc-log-status - vidioc-overlay - vidioc-prepare-buf - vidioc-qbuf - vidioc-querybuf - vidioc-querycap - vidioc-queryctrl - vidioc-query-dv-timings - vidioc-querystd - vidioc-reqbufs - vidioc-s-hw-freq-seek - vidioc-streamon - vidioc-subdev-enum-frame-interval - vidioc-subdev-enum-frame-size - vidioc-subdev-enum-mbus-code - vidioc-subdev-g-crop - vidioc-subdev-g-fmt - vidioc-subdev-g-frame-interval - vidioc-subdev-g-selection - vidioc-subscribe-event - func-mmap - func-munmap - func-open - func-poll - func-read - func-select - func-write diff --git a/Documentation/media/uapi/v4l/userp.rst b/Documentation/media/uapi/v4l/userp.rst deleted file mode 100644 index b19da8655452..000000000000 --- a/Documentation/media/uapi/v4l/userp.rst +++ /dev/null @@ -1,128 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _userp: - -***************************** -Streaming I/O (User Pointers) -***************************** - -Input and output devices support this I/O method when the -``V4L2_CAP_STREAMING`` flag in the ``capabilities`` field of struct -:c:type:`v4l2_capability` returned by the -:ref:`VIDIOC_QUERYCAP` ioctl is set. If the -particular user pointer method (not only memory mapping) is supported -must be determined by calling the :ref:`VIDIOC_REQBUFS` ioctl -with the memory type set to ``V4L2_MEMORY_USERPTR``. - -This I/O method combines advantages of the read/write and memory mapping -methods. Buffers (planes) are allocated by the application itself, and -can reside for example in virtual or shared memory. Only pointers to -data are exchanged, these pointers and meta-information are passed in -struct :c:type:`v4l2_buffer` (or in struct -:c:type:`v4l2_plane` in the multi-planar API case). The -driver must be switched into user pointer I/O mode by calling the -:ref:`VIDIOC_REQBUFS` with the desired buffer type. -No buffers (planes) are allocated beforehand, consequently they are not -indexed and cannot be queried like mapped buffers with the -:ref:`VIDIOC_QUERYBUF <VIDIOC_QUERYBUF>` ioctl. - -Example: Initiating streaming I/O with user pointers -==================================================== - -.. code-block:: c - - struct v4l2_requestbuffers reqbuf; - - memset (&reqbuf, 0, sizeof (reqbuf)); - reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - reqbuf.memory = V4L2_MEMORY_USERPTR; - - if (ioctl (fd, VIDIOC_REQBUFS, &reqbuf) == -1) { - if (errno == EINVAL) - printf ("Video capturing or user pointer streaming is not supported\\n"); - else - perror ("VIDIOC_REQBUFS"); - - exit (EXIT_FAILURE); - } - -Buffer (plane) addresses and sizes are passed on the fly with the -:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl. Although buffers are commonly -cycled, applications can pass different addresses and sizes at each -:ref:`VIDIOC_QBUF <VIDIOC_QBUF>` call. If required by the hardware the -driver swaps memory pages within physical memory to create a continuous -area of memory. This happens transparently to the application in the -virtual memory subsystem of the kernel. When buffer pages have been -swapped out to disk they are brought back and finally locked in physical -memory for DMA. [#f1]_ - -Filled or displayed buffers are dequeued with the -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl. The driver can unlock the -memory pages at any time between the completion of the DMA and this -ioctl. The memory is also unlocked when -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` is called, -:ref:`VIDIOC_REQBUFS`, or when the device is closed. -Applications must take care not to free buffers without dequeuing. -Firstly, the buffers remain locked for longer, wasting physical memory. -Secondly the driver will not be notified when the memory is returned to -the application's free list and subsequently reused for other purposes, -possibly completing the requested DMA and overwriting valuable data. - -For capturing applications it is customary to enqueue a number of empty -buffers, to start capturing and enter the read loop. Here the -application waits until a filled buffer can be dequeued, and re-enqueues -the buffer when the data is no longer needed. Output applications fill -and enqueue buffers, when enough buffers are stacked up output is -started. In the write loop, when the application runs out of free -buffers it must wait until an empty buffer can be dequeued and reused. -Two methods exist to suspend execution of the application until one or -more buffers can be dequeued. By default :ref:`VIDIOC_DQBUF -<VIDIOC_QBUF>` blocks when no buffer is in the outgoing queue. When the -``O_NONBLOCK`` flag was given to the :ref:`open() <func-open>` function, -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` returns immediately with an ``EAGAIN`` -error code when no buffer is available. The :ref:`select() -<func-select>` or :ref:`poll() <func-poll>` function are always -available. - -To start and stop capturing or output applications call the -:ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` and -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctl. - -.. note:: - - :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` removes all buffers from - both queues and unlocks all buffers as a side effect. Since there is no - notion of doing anything "now" on a multitasking system, if an - application needs to synchronize with another event it should examine - the struct :c:type:`v4l2_buffer` ``timestamp`` of captured or - outputted buffers. - -Drivers implementing user pointer I/O must support the -:ref:`VIDIOC_REQBUFS <VIDIOC_REQBUFS>`, :ref:`VIDIOC_QBUF <VIDIOC_QBUF>`, -:ref:`VIDIOC_DQBUF <VIDIOC_QBUF>`, :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` -and :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` ioctls, the -:ref:`select() <func-select>` and :ref:`poll() <func-poll>` function. [#f2]_ - -.. [#f1] - We expect that frequently used buffers are typically not swapped out. - Anyway, the process of swapping, locking or generating scatter-gather - lists may be time consuming. The delay can be masked by the depth of - the incoming buffer queue, and perhaps by maintaining caches assuming - a buffer will be soon enqueued again. On the other hand, to optimize - memory usage drivers can limit the number of buffers locked in - advance and recycle the most recently used buffers first. Of course, - the pages of empty buffers in the incoming queue need not be saved to - disk. Output buffers must be saved on the incoming and outgoing queue - because an application may share them with other processes. - -.. [#f2] - At the driver level :ref:`select() <func-select>` and :ref:`poll() <func-poll>` are - the same, and :ref:`select() <func-select>` is too important to be optional. - The rest should be evident. diff --git a/Documentation/media/uapi/v4l/v4l2-selection-flags.rst b/Documentation/media/uapi/v4l/v4l2-selection-flags.rst deleted file mode 100644 index cc8f2a2b7cba..000000000000 --- a/Documentation/media/uapi/v4l/v4l2-selection-flags.rst +++ /dev/null @@ -1,51 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-selection-flags: - -*************** -Selection flags -*************** - -.. tabularcolumns:: |p{5.2cm}|p{2.0cm}|p{6.5cm}|p{1.2cm}|p{1.6cm}| - -.. _v4l2-selection-flags-table: - -.. flat-table:: Selection flag definitions - :header-rows: 1 - :stub-columns: 0 - - * - Flag name - - id - - Definition - - Valid for V4L2 - - Valid for V4L2 subdev - * - ``V4L2_SEL_FLAG_GE`` - - (1 << 0) - - Suggest the driver it should choose greater or equal rectangle (in - size) than was requested. Albeit the driver may choose a lesser - size, it will only do so due to hardware limitations. Without this - flag (and ``V4L2_SEL_FLAG_LE``) the behaviour is to choose the - closest possible rectangle. - - Yes - - Yes - * - ``V4L2_SEL_FLAG_LE`` - - (1 << 1) - - Suggest the driver it should choose lesser or equal rectangle (in - size) than was requested. Albeit the driver may choose a greater - size, it will only do so due to hardware limitations. - - Yes - - Yes - * - ``V4L2_SEL_FLAG_KEEP_CONFIG`` - - (1 << 2) - - The configuration must not be propagated to any further processing - steps. If this flag is not given, the configuration is propagated - inside the subdevice to all further processing steps. - - No - - Yes diff --git a/Documentation/media/uapi/v4l/v4l2-selection-targets.rst b/Documentation/media/uapi/v4l/v4l2-selection-targets.rst deleted file mode 100644 index aae0c0013eb1..000000000000 --- a/Documentation/media/uapi/v4l/v4l2-selection-targets.rst +++ /dev/null @@ -1,78 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2-selection-targets: - -***************** -Selection targets -***************** - -The precise meaning of the selection targets may be dependent on which -of the two interfaces they are used. - - -.. _v4l2-selection-targets-table: - -.. tabularcolumns:: |p{6.0cm}|p{1.4cm}|p{7.4cm}|p{1.2cm}|p{1.4cm}| - -.. flat-table:: Selection target definitions - :header-rows: 1 - :stub-columns: 0 - - * - Target name - - id - - Definition - - Valid for V4L2 - - Valid for V4L2 subdev - * - ``V4L2_SEL_TGT_CROP`` - - 0x0000 - - Crop rectangle. Defines the cropped area. - - Yes - - Yes - * - ``V4L2_SEL_TGT_CROP_DEFAULT`` - - 0x0001 - - Suggested cropping rectangle that covers the "whole picture". - This includes only active pixels and excludes other non-active - pixels such as black pixels. - - Yes - - Yes - * - ``V4L2_SEL_TGT_CROP_BOUNDS`` - - 0x0002 - - Bounds of the crop rectangle. All valid crop rectangles fit inside - the crop bounds rectangle. - - Yes - - Yes - * - ``V4L2_SEL_TGT_NATIVE_SIZE`` - - 0x0003 - - The native size of the device, e.g. a sensor's pixel array. - ``left`` and ``top`` fields are zero for this target. - - Yes - - Yes - * - ``V4L2_SEL_TGT_COMPOSE`` - - 0x0100 - - Compose rectangle. Used to configure scaling and composition. - - Yes - - Yes - * - ``V4L2_SEL_TGT_COMPOSE_DEFAULT`` - - 0x0101 - - Suggested composition rectangle that covers the "whole picture". - - Yes - - No - * - ``V4L2_SEL_TGT_COMPOSE_BOUNDS`` - - 0x0102 - - Bounds of the compose rectangle. All valid compose rectangles fit - inside the compose bounds rectangle. - - Yes - - Yes - * - ``V4L2_SEL_TGT_COMPOSE_PADDED`` - - 0x0103 - - The active area and all padding pixels that are inserted or - modified by hardware. - - Yes - - No diff --git a/Documentation/media/uapi/v4l/v4l2.rst b/Documentation/media/uapi/v4l/v4l2.rst deleted file mode 100644 index 97015b9b40b8..000000000000 --- a/Documentation/media/uapi/v4l/v4l2.rst +++ /dev/null @@ -1,423 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. include:: <isonum.txt> -.. _v4l2spec: - -############################ -Part I - Video for Linux API -############################ - -This part describes the Video for Linux API version 2 (V4L2 API) specification. - -**Revision 4.5** - -.. only:: html - - .. class:: toc-title - - Table of Contents - -.. toctree:: - :numbered: - :maxdepth: 5 - - common - pixfmt - io - devices - libv4l - compat - user-func - common-defs - videodev - capture-example - v4l2grab-example - biblio - - -********************** -Revision and Copyright -********************** - -Authors, in alphabetical order: - -- Ailus, Sakari <sakari.ailus@iki.fi> - - - Subdev selections API. - -- Carvalho Chehab, Mauro <mchehab+samsung@kernel.org> - - - Documented libv4l, designed and added v4l2grab example, Remote Controller chapter. - -- Dirks, Bill - - - Original author of the V4L2 API and documentation. - -- Figa, Tomasz <tfiga@chromium.org> - - - Documented the memory-to-memory decoder interface. - -- H Schimek, Michael <mschimek@gmx.at> - - - Original author of the V4L2 API and documentation. - -- Karicheri, Muralidharan <m-karicheri2@ti.com> - - - Documented the Digital Video timings API. - -- Osciak, Pawel <posciak@chromium.org> - - - Documented the memory-to-memory decoder interface. - -- Osciak, Pawel <pawel@osciak.com> - - - Designed and documented the multi-planar API. - -- Palosaari, Antti <crope@iki.fi> - - - SDR API. - -- Ribalda, Ricardo - - - Introduce HSV formats and other minor changes. - -- Rubli, Martin - - - Designed and documented the VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS ioctls. - -- Walls, Andy <awalls@md.metrocast.net> - - - Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV MPEG stream embedded, sliced VBI data format in this specification. - -- Verkuil, Hans <hverkuil@xs4all.nl> - - - Designed and documented the VIDIOC_LOG_STATUS ioctl, the extended control ioctls, major parts of the sliced VBI API, the MPEG encoder and decoder APIs and the DV Timings API. - -**Copyright** |copy| 1999-2018: Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab, Pawel Osciak, Sakari Ailus & Antti Palosaari, Tomasz Figa - -Except when explicitly stated as GPL, programming examples within this -part can be used and distributed without restrictions. - -**************** -Revision History -**************** - -:revision: 4.10 / 2016-07-15 (*rr*) - -Introduce HSV formats. - - -:revision: 4.5 / 2015-10-29 (*rr*) - -Extend VIDIOC_G_EXT_CTRLS;. Replace ctrl_class with a new union with -ctrl_class and which. Which is used to select the current value of the -control or the default value. - - -:revision: 4.4 / 2015-05-26 (*ap*) - -Renamed V4L2_TUNER_ADC to V4L2_TUNER_SDR. Added -V4L2_CID_RF_TUNER_RF_GAIN control. Added transmitter support for -Software Defined Radio (SDR) Interface. - - -:revision: 4.1 / 2015-02-13 (*mcc*) - -Fix documentation for media controller device nodes and add support for -DVB device nodes. Add support for Tuner sub-device. - - -:revision: 3.19 / 2014-12-05 (*hv*) - -Rewrote Colorspace chapter, added new enum -:c:type:`v4l2_ycbcr_encoding` and enum -:c:type:`v4l2_quantization` fields to struct -:c:type:`v4l2_pix_format`, struct -:c:type:`v4l2_pix_format_mplane` and struct -:c:type:`v4l2_mbus_framefmt`. - - -:revision: 3.17 / 2014-08-04 (*lp, hv*) - -Extended struct :c:type:`v4l2_pix_format`. Added -format flags. Added compound control types and VIDIOC_QUERY_EXT_CTRL. - - -:revision: 3.15 / 2014-02-03 (*hv, ap*) - -Update several sections of "Common API Elements": "Opening and Closing -Devices" "Querying Capabilities", "Application Priority", "Video Inputs -and Outputs", "Audio Inputs and Outputs" "Tuners and Modulators", "Video -Standards" and "Digital Video (DV) Timings". Added SDR API. - - -:revision: 3.14 / 2013-11-25 (*rr*) - -Set width and height as unsigned on v4l2_rect. - - -:revision: 3.11 / 2013-05-26 (*hv*) - -Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl. - - -:revision: 3.10 / 2013-03-25 (*hv*) - -Remove obsolete and unused DV_PRESET ioctls: VIDIOC_G_DV_PRESET, -VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and -VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output -capability flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS. -Added VIDIOC_DBG_G_CHIP_INFO. - - -:revision: 3.9 / 2012-12-03 (*sa, sn*) - -Added timestamp types to v4l2_buffer. Added -V4L2_EVENT_CTRL_CH_RANGE control event changes flag. - - -:revision: 3.6 / 2012-07-02 (*hv*) - -Added VIDIOC_ENUM_FREQ_BANDS. - - -:revision: 3.5 / 2012-05-07 (*sa, sn, hv*) - -Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev selections API. -Improved the description of V4L2_CID_COLORFX control, added -V4L2_CID_COLORFX_CBCR control. Added camera controls -V4L2_CID_AUTO_EXPOSURE_BIAS, -V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE, -V4L2_CID_IMAGE_STABILIZATION, V4L2_CID_ISO_SENSITIVITY, -V4L2_CID_ISO_SENSITIVITY_AUTO, V4L2_CID_EXPOSURE_METERING, -V4L2_CID_SCENE_MODE, V4L2_CID_3A_LOCK, -V4L2_CID_AUTO_FOCUS_START, V4L2_CID_AUTO_FOCUS_STOP, -V4L2_CID_AUTO_FOCUS_STATUS and V4L2_CID_AUTO_FOCUS_RANGE. Added -VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and -VIDIOC_DV_TIMINGS_CAP. - - -:revision: 3.4 / 2012-01-25 (*sn*) - -Added :ref:`JPEG compression control class. <jpeg-controls>` - - -:revision: 3.3 / 2012-01-11 (*hv*) - -Added device_caps field to struct v4l2_capabilities. - - -:revision: 3.2 / 2011-08-26 (*hv*) - -Added V4L2_CTRL_FLAG_VOLATILE. - - -:revision: 3.1 / 2011-06-27 (*mcc, po, hv*) - -Documented that VIDIOC_QUERYCAP now returns a per-subsystem version -instead of a per-driver one. Standardize an error code for invalid -ioctl. Added V4L2_CTRL_TYPE_BITMASK. - - -:revision: 2.6.39 / 2011-03-01 (*mcc, po*) - -Removed VIDIOC_*_OLD from videodev2.h header and update it to reflect -latest changes. Added the :ref:`multi-planar API <planar-apis>`. - - -:revision: 2.6.37 / 2010-08-06 (*hv*) - -Removed obsolete vtx (videotext) API. - - -:revision: 2.6.33 / 2009-12-03 (*mk*) - -Added documentation for the Digital Video timings API. - - -:revision: 2.6.32 / 2009-08-31 (*mcc*) - -Now, revisions will match the kernel version where the V4L2 API changes -will be used by the Linux Kernel. Also added Remote Controller chapter. - - -:revision: 0.29 / 2009-08-26 (*ev*) - -Added documentation for string controls and for FM Transmitter controls. - - -:revision: 0.28 / 2009-08-26 (*gl*) - -Added V4L2_CID_BAND_STOP_FILTER documentation. - - -:revision: 0.27 / 2009-08-15 (*mcc*) - -Added libv4l and Remote Controller documentation; added v4l2grab and -keytable application examples. - - -:revision: 0.26 / 2009-07-23 (*hv*) - -Finalized the RDS capture API. Added modulator and RDS encoder -capabilities. Added support for string controls. - - -:revision: 0.25 / 2009-01-18 (*hv*) - -Added pixel formats VYUY, NV16 and NV61, and changed the debug ioctls -VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT. Added camera -controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE, -V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY. - - -:revision: 0.24 / 2008-03-04 (*mhs*) - -Added pixel formats Y16 and SBGGR16, new controls and a camera controls -class. Removed VIDIOC_G/S_MPEGCOMP. - - -:revision: 0.23 / 2007-08-30 (*mhs*) - -Fixed a typo in VIDIOC_DBG_G/S_REGISTER. Clarified the byte order of -packed pixel formats. - - -:revision: 0.22 / 2007-08-29 (*mhs*) - -Added the Video Output Overlay interface, new MPEG controls, -V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT, -VIDIOC_DBG_G/S_REGISTER, VIDIOC\_(TRY\_)ENCODER_CMD, -VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats. -Clarifications in the cropping chapter, about RGB pixel formats, the -mmap(), poll(), select(), read() and write() functions. Typographical -fixes. - - -:revision: 0.21 / 2006-12-19 (*mhs*) - -Fixed a link in the VIDIOC_G_EXT_CTRLS section. - - -:revision: 0.20 / 2006-11-24 (*mhs*) - -Clarified the purpose of the audioset field in struct v4l2_input and -v4l2_output. - - -:revision: 0.19 / 2006-10-19 (*mhs*) - -Documented V4L2_PIX_FMT_RGB444. - - -:revision: 0.18 / 2006-10-18 (*mhs*) - -Added the description of extended controls by Hans Verkuil. Linked -V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE. - - -:revision: 0.17 / 2006-10-12 (*mhs*) - -Corrected V4L2_PIX_FMT_HM12 description. - - -:revision: 0.16 / 2006-10-08 (*mhs*) - -VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS are now part -of the API. - - -:revision: 0.15 / 2006-09-23 (*mhs*) - -Cleaned up the bibliography, added BT.653 and BT.1119. -capture.c/start_capturing() for user pointer I/O did not initialize the -buffer index. Documented the V4L MPEG and MJPEG VID_TYPEs and -V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel formats. See -the history chapter for API changes. - - -:revision: 0.14 / 2006-09-14 (*mr*) - -Added VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS proposal -for frame format enumeration of digital devices. - - -:revision: 0.13 / 2006-04-07 (*mhs*) - -Corrected the description of struct v4l2_window clips. New V4L2_STD\_ -and V4L2_TUNER_MODE_LANG1_LANG2 defines. - - -:revision: 0.12 / 2006-02-03 (*mhs*) - -Corrected the description of struct v4l2_captureparm and -v4l2_outputparm. - - -:revision: 0.11 / 2006-01-27 (*mhs*) - -Improved the description of struct v4l2_tuner. - - -:revision: 0.10 / 2006-01-10 (*mhs*) - -VIDIOC_G_INPUT and VIDIOC_S_PARM clarifications. - - -:revision: 0.9 / 2005-11-27 (*mhs*) - -Improved the 525 line numbering diagram. Hans Verkuil and I rewrote the -sliced VBI section. He also contributed a VIDIOC_LOG_STATUS page. -Fixed VIDIOC_S_STD call in the video standard selection example. -Various updates. - - -:revision: 0.8 / 2004-10-04 (*mhs*) - -Somehow a piece of junk slipped into the capture example, removed. - - -:revision: 0.7 / 2004-09-19 (*mhs*) - -Fixed video standard selection, control enumeration, downscaling and -aspect example. Added read and user pointer i/o to video capture -example. - - -:revision: 0.6 / 2004-08-01 (*mhs*) - -v4l2_buffer changes, added video capture example, various corrections. - - -:revision: 0.5 / 2003-11-05 (*mhs*) - -Pixel format erratum. - - -:revision: 0.4 / 2003-09-17 (*mhs*) - -Corrected source and Makefile to generate a PDF. SGML fixes. Added -latest API changes. Closed gaps in the history chapter. - - -:revision: 0.3 / 2003-02-05 (*mhs*) - -Another draft, more corrections. - - -:revision: 0.2 / 2003-01-15 (*mhs*) - -Second draft, with corrections pointed out by Gerd Knorr. - - -:revision: 0.1 / 2002-12-01 (*mhs*) - -First draft, based on documentation by Bill Dirks and discussions on the -V4L mailing list. diff --git a/Documentation/media/uapi/v4l/v4l2grab-example.rst b/Documentation/media/uapi/v4l/v4l2grab-example.rst deleted file mode 100644 index 2a0cfd4429c1..000000000000 --- a/Documentation/media/uapi/v4l/v4l2grab-example.rst +++ /dev/null @@ -1,24 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _v4l2grab-example: - -********************************** -Video Grabber example using libv4l -********************************** - -This program demonstrates how to grab V4L2 images in ppm format by using -libv4l handlers. The advantage is that this grabber can potentially work -with any V4L2 driver. - - -.. toctree:: - :maxdepth: 1 - - v4l2grab.c diff --git a/Documentation/media/uapi/v4l/v4l2grab.c.rst b/Documentation/media/uapi/v4l/v4l2grab.c.rst deleted file mode 100644 index e76c5fb7bd19..000000000000 --- a/Documentation/media/uapi/v4l/v4l2grab.c.rst +++ /dev/null @@ -1,176 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -file: media/v4l/v4l2grab.c -========================== - -.. code-block:: c - - /* V4L2 video picture grabber - Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@kernel.org> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - */ - - #include <stdio.h> - #include <stdlib.h> - #include <string.h> - #include <fcntl.h> - #include <errno.h> - #include <sys/ioctl.h> - #include <sys/types.h> - #include <sys/time.h> - #include <sys/mman.h> - #include <linux/videodev2.h> - #include "../libv4l/include/libv4l2.h" - - #define CLEAR(x) memset(&(x), 0, sizeof(x)) - - struct buffer { - void *start; - size_t length; - }; - - static void xioctl(int fh, int request, void *arg) - { - int r; - - do { - r = v4l2_ioctl(fh, request, arg); - } while (r == -1 && ((errno == EINTR) || (errno == EAGAIN))); - - if (r == -1) { - fprintf(stderr, "error %d, %s\\n", errno, strerror(errno)); - exit(EXIT_FAILURE); - } - } - - int main(int argc, char **argv) - { - struct v4l2_format fmt; - struct v4l2_buffer buf; - struct v4l2_requestbuffers req; - enum v4l2_buf_type type; - fd_set fds; - struct timeval tv; - int r, fd = -1; - unsigned int i, n_buffers; - char *dev_name = "/dev/video0"; - char out_name[256]; - FILE *fout; - struct buffer *buffers; - - fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0); - if (fd < 0) { - perror("Cannot open device"); - exit(EXIT_FAILURE); - } - - CLEAR(fmt); - fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - fmt.fmt.pix.width = 640; - fmt.fmt.pix.height = 480; - fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24; - fmt.fmt.pix.field = V4L2_FIELD_INTERLACED; - xioctl(fd, VIDIOC_S_FMT, &fmt); - if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) { - printf("Libv4l didn't accept RGB24 format. Can't proceed.\\n"); - exit(EXIT_FAILURE); - } - if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480)) - printf("Warning: driver is sending image at %dx%d\\n", - fmt.fmt.pix.width, fmt.fmt.pix.height); - - CLEAR(req); - req.count = 2; - req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - req.memory = V4L2_MEMORY_MMAP; - xioctl(fd, VIDIOC_REQBUFS, &req); - - buffers = calloc(req.count, sizeof(*buffers)); - for (n_buffers = 0; n_buffers < req.count; ++n_buffers) { - CLEAR(buf); - - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; - buf.index = n_buffers; - - xioctl(fd, VIDIOC_QUERYBUF, &buf); - - buffers[n_buffers].length = buf.length; - buffers[n_buffers].start = v4l2_mmap(NULL, buf.length, - PROT_READ | PROT_WRITE, MAP_SHARED, - fd, buf.m.offset); - - if (MAP_FAILED == buffers[n_buffers].start) { - perror("mmap"); - exit(EXIT_FAILURE); - } - } - - for (i = 0; i < n_buffers; ++i) { - CLEAR(buf); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; - buf.index = i; - xioctl(fd, VIDIOC_QBUF, &buf); - } - type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - - xioctl(fd, VIDIOC_STREAMON, &type); - for (i = 0; i < 20; i++) { - do { - FD_ZERO(&fds); - FD_SET(fd, &fds); - - /* Timeout. */ - tv.tv_sec = 2; - tv.tv_usec = 0; - - r = select(fd + 1, &fds, NULL, NULL, &tv); - } while ((r == -1 && (errno = EINTR))); - if (r == -1) { - perror("select"); - return errno; - } - - CLEAR(buf); - buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - buf.memory = V4L2_MEMORY_MMAP; - xioctl(fd, VIDIOC_DQBUF, &buf); - - sprintf(out_name, "out%03d.ppm", i); - fout = fopen(out_name, "w"); - if (!fout) { - perror("Cannot open image"); - exit(EXIT_FAILURE); - } - fprintf(fout, "P6\\n%d %d 255\\n", - fmt.fmt.pix.width, fmt.fmt.pix.height); - fwrite(buffers[buf.index].start, buf.bytesused, 1, fout); - fclose(fout); - - xioctl(fd, VIDIOC_QBUF, &buf); - } - - type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - xioctl(fd, VIDIOC_STREAMOFF, &type); - for (i = 0; i < n_buffers; ++i) - v4l2_munmap(buffers[i].start, buffers[i].length); - v4l2_close(fd); - - return 0; - } diff --git a/Documentation/media/uapi/v4l/vbi_525.svg b/Documentation/media/uapi/v4l/vbi_525.svg deleted file mode 100644 index 6cd5def22b1f..000000000000 --- a/Documentation/media/uapi/v4l/vbi_525.svg +++ /dev/null @@ -1,821 +0,0 @@ -<?xml version="1.0" encoding="UTF-8" standalone="no"?> -<!-- - Permission is granted to copy, distribute and/or modify this - document under the terms of the GNU Free Documentation License, - Version 1.1 or any later version published by the Free Software - Foundation, with no Invariant Sections, no Front-Cover Texts - and no Back-Cover Texts. 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Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _video: - -************************ -Video Inputs and Outputs -************************ - -Video inputs and outputs are physical connectors of a device. These can -be for example: RF connectors (antenna/cable), CVBS a.k.a. Composite -Video, S-Video and RGB connectors. Camera sensors are also considered to -be a video input. Video and VBI capture devices have inputs. Video and -VBI output devices have outputs, at least one each. Radio devices have -no video inputs or outputs. - -To learn about the number and attributes of the available inputs and -outputs applications can enumerate them with the -:ref:`VIDIOC_ENUMINPUT` and -:ref:`VIDIOC_ENUMOUTPUT` ioctl, respectively. The -struct :c:type:`v4l2_input` returned by the -:ref:`VIDIOC_ENUMINPUT` ioctl also contains signal -status information applicable when the current video input is queried. - -The :ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` and -:ref:`VIDIOC_G_OUTPUT <VIDIOC_G_OUTPUT>` ioctls return the index of -the current video input or output. To select a different input or output -applications call the :ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` and -:ref:`VIDIOC_S_OUTPUT <VIDIOC_G_OUTPUT>` ioctls. Drivers must -implement all the input ioctls when the device has one or more inputs, -all the output ioctls when the device has one or more outputs. - -Example: Information about the current video input -================================================== - -.. code-block:: c - - struct v4l2_input input; - int index; - - if (-1 == ioctl(fd, VIDIOC_G_INPUT, &index)) { - perror("VIDIOC_G_INPUT"); - exit(EXIT_FAILURE); - } - - memset(&input, 0, sizeof(input)); - input.index = index; - - if (-1 == ioctl(fd, VIDIOC_ENUMINPUT, &input)) { - perror("VIDIOC_ENUMINPUT"); - exit(EXIT_FAILURE); - } - - printf("Current input: %s\\n", input.name); - - -Example: Switching to the first video input -=========================================== - -.. code-block:: c - - int index; - - index = 0; - - if (-1 == ioctl(fd, VIDIOC_S_INPUT, &index)) { - perror("VIDIOC_S_INPUT"); - exit(EXIT_FAILURE); - } diff --git a/Documentation/media/uapi/v4l/videodev.rst b/Documentation/media/uapi/v4l/videodev.rst deleted file mode 100644 index fa3d3398930a..000000000000 --- a/Documentation/media/uapi/v4l/videodev.rst +++ /dev/null @@ -1,16 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _videodev: - -******************************* -Video For Linux Two Header File -******************************* - -.. kernel-include:: $BUILDDIR/videodev2.h.rst diff --git a/Documentation/media/uapi/v4l/vidioc-create-bufs.rst b/Documentation/media/uapi/v4l/vidioc-create-bufs.rst deleted file mode 100644 index bd08e4f77ae4..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-create-bufs.rst +++ /dev/null @@ -1,141 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_CREATE_BUFS: - -************************ -ioctl VIDIOC_CREATE_BUFS -************************ - -Name -==== - -VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_CREATE_BUFS, struct v4l2_create_buffers *argp ) - :name: VIDIOC_CREATE_BUFS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_create_buffers`. - - -Description -=========== - -This ioctl is used to create buffers for :ref:`memory mapped <mmap>` -or :ref:`user pointer <userp>` or :ref:`DMA buffer <dmabuf>` I/O. It -can be used as an alternative or in addition to the -:ref:`VIDIOC_REQBUFS` ioctl, when a tighter control -over buffers is required. This ioctl can be called multiple times to -create buffers of different sizes. - -To allocate the device buffers applications must initialize the relevant -fields of the struct :c:type:`v4l2_create_buffers` structure. The -``count`` field must be set to the number of requested buffers, the -``memory`` field specifies the requested I/O method and the ``reserved`` -array must be zeroed. - -The ``format`` field specifies the image format that the buffers must be -able to handle. The application has to fill in this struct -:c:type:`v4l2_format`. Usually this will be done using the -:ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` or -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctls to ensure that the -requested format is supported by the driver. Based on the format's -``type`` field the requested buffer size (for single-planar) or plane -sizes (for multi-planar formats) will be used for the allocated buffers. -The driver may return an error if the size(s) are not supported by the -hardware (usually because they are too small). - -The buffers created by this ioctl will have as minimum size the size -defined by the ``format.pix.sizeimage`` field (or the corresponding -fields for other format types). Usually if the ``format.pix.sizeimage`` -field is less than the minimum required for the given format, then an -error will be returned since drivers will typically not allow this. If -it is larger, then the value will be used as-is. In other words, the -driver may reject the requested size, but if it is accepted the driver -will use it unchanged. - -When the ioctl is called with a pointer to this structure the driver -will attempt to allocate up to the requested number of buffers and store -the actual number allocated and the starting index in the ``count`` and -the ``index`` fields respectively. On return ``count`` can be smaller -than the number requested. - - -.. c:type:: v4l2_create_buffers - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_create_buffers - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - The starting buffer index, returned by the driver. - * - __u32 - - ``count`` - - The number of buffers requested or granted. If count == 0, then - :ref:`VIDIOC_CREATE_BUFS` will set ``index`` to the current number of - created buffers, and it will check the validity of ``memory`` and - ``format.type``. If those are invalid -1 is returned and errno is - set to ``EINVAL`` error code, otherwise :ref:`VIDIOC_CREATE_BUFS` returns - 0. It will never set errno to ``EBUSY`` error code in this particular - case. - * - __u32 - - ``memory`` - - Applications set this field to ``V4L2_MEMORY_MMAP``, - ``V4L2_MEMORY_DMABUF`` or ``V4L2_MEMORY_USERPTR``. See - :c:type:`v4l2_memory` - * - struct :c:type:`v4l2_format` - - ``format`` - - Filled in by the application, preserved by the driver. - * - __u32 - - ``capabilities`` - - Set by the driver. If 0, then the driver doesn't support - capabilities. In that case all you know is that the driver is - guaranteed to support ``V4L2_MEMORY_MMAP`` and *might* support - other :c:type:`v4l2_memory` types. It will not support any others - capabilities. See :ref:`here <v4l2-buf-capabilities>` for a list of the - capabilities. - - If you want to just query the capabilities without making any - other changes, then set ``count`` to 0, ``memory`` to - ``V4L2_MEMORY_MMAP`` and ``format.type`` to the buffer type. - * - __u32 - - ``reserved``\ [7] - - A place holder for future extensions. Drivers and applications - must set the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -ENOMEM - No memory to allocate buffers for :ref:`memory mapped <mmap>` I/O. - -EINVAL - The buffer type (``format.type`` field), requested I/O method - (``memory``) or format (``format`` field) is not valid. diff --git a/Documentation/media/uapi/v4l/vidioc-cropcap.rst b/Documentation/media/uapi/v4l/vidioc-cropcap.rst deleted file mode 100644 index 019d3d3a0e0d..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-cropcap.rst +++ /dev/null @@ -1,143 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_CROPCAP: - -******************** -ioctl VIDIOC_CROPCAP -******************** - -Name -==== - -VIDIOC_CROPCAP - Information about the video cropping and scaling abilities - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_CROPCAP, struct v4l2_cropcap *argp ) - :name: VIDIOC_CROPCAP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_cropcap`. - - -Description -=========== - -Applications use this function to query the cropping limits, the pixel -aspect of images and to calculate scale factors. They set the ``type`` -field of a v4l2_cropcap structure to the respective buffer (stream) -type and call the :ref:`VIDIOC_CROPCAP` ioctl with a pointer to this -structure. Drivers fill the rest of the structure. The results are -constant except when switching the video standard. Remember this switch -can occur implicit when switching the video input or output. - -This ioctl must be implemented for video capture or output devices that -support cropping and/or scaling and/or have non-square pixels, and for -overlay devices. - -.. c:type:: v4l2_cropcap - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_cropcap - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of the data stream, set by the application. Only these types - are valid here: ``V4L2_BUF_TYPE_VIDEO_CAPTURE``, ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``, - ``V4L2_BUF_TYPE_VIDEO_OUTPUT``, ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`` and - ``V4L2_BUF_TYPE_VIDEO_OVERLAY``. See :c:type:`v4l2_buf_type` and the note below. - * - struct :ref:`v4l2_rect <v4l2-rect-crop>` - - ``bounds`` - - Defines the window within capturing or output is possible, this - may exclude for example the horizontal and vertical blanking - areas. The cropping rectangle cannot exceed these limits. Width - and height are defined in pixels, the driver writer is free to - choose origin and units of the coordinate system in the analog - domain. - * - struct :ref:`v4l2_rect <v4l2-rect-crop>` - - ``defrect`` - - Default cropping rectangle, it shall cover the "whole picture". - Assuming pixel aspect 1/1 this could be for example a 640 × 480 - rectangle for NTSC, a 768 × 576 rectangle for PAL and SECAM - centered over the active picture area. The same co-ordinate system - as for ``bounds`` is used. - * - struct :c:type:`v4l2_fract` - - ``pixelaspect`` - - This is the pixel aspect (y / x) when no scaling is applied, the - ratio of the actual sampling frequency and the frequency required - to get square pixels. - - When cropping coordinates refer to square pixels, the driver sets - ``pixelaspect`` to 1/1. Other common values are 54/59 for PAL and - SECAM, 11/10 for NTSC sampled according to [:ref:`itu601`]. - -.. note:: - Unfortunately in the case of multiplanar buffer types - (``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``) - this API was messed up with regards to how the :c:type:`v4l2_cropcap` ``type`` field - should be filled in. Some drivers only accepted the ``_MPLANE`` buffer type while - other drivers only accepted a non-multiplanar buffer type (i.e. without the - ``_MPLANE`` at the end). - - Starting with kernel 4.13 both variations are allowed. - - - -.. _v4l2-rect-crop: - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_rect - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __s32 - - ``left`` - - Horizontal offset of the top, left corner of the rectangle, in - pixels. - * - __s32 - - ``top`` - - Vertical offset of the top, left corner of the rectangle, in - pixels. - * - __u32 - - ``width`` - - Width of the rectangle, in pixels. - * - __u32 - - ``height`` - - Height of the rectangle, in pixels. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_cropcap` ``type`` is - invalid. - -ENODATA - Cropping is not supported for this input or output. diff --git a/Documentation/media/uapi/v4l/vidioc-dbg-g-chip-info.rst b/Documentation/media/uapi/v4l/vidioc-dbg-g-chip-info.rst deleted file mode 100644 index d38031dbe4e4..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-dbg-g-chip-info.rst +++ /dev/null @@ -1,167 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_DBG_G_CHIP_INFO: - -**************************** -ioctl VIDIOC_DBG_G_CHIP_INFO -**************************** - -Name -==== - -VIDIOC_DBG_G_CHIP_INFO - Identify the chips on a TV card - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_DBG_G_CHIP_INFO, struct v4l2_dbg_chip_info *argp ) - :name: VIDIOC_DBG_G_CHIP_INFO - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_dbg_chip_info`. - - -Description -=========== - -.. note:: - - This is an :ref:`experimental` interface and may - change in the future. - -For driver debugging purposes this ioctl allows test applications to -query the driver about the chips present on the TV card. Regular -applications must not use it. When you found a chip specific bug, please -contact the linux-media mailing list -(`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__) -so it can be fixed. - -Additionally the Linux kernel must be compiled with the -``CONFIG_VIDEO_ADV_DEBUG`` option to enable this ioctl. - -To query the driver applications must initialize the ``match.type`` and -``match.addr`` or ``match.name`` fields of a struct -:c:type:`v4l2_dbg_chip_info` and call -:ref:`VIDIOC_DBG_G_CHIP_INFO` with a pointer to this structure. On success -the driver stores information about the selected chip in the ``name`` -and ``flags`` fields. - -When ``match.type`` is ``V4L2_CHIP_MATCH_BRIDGE``, ``match.addr`` -selects the nth bridge 'chip' on the TV card. You can enumerate all -chips by starting at zero and incrementing ``match.addr`` by one until -:ref:`VIDIOC_DBG_G_CHIP_INFO` fails with an ``EINVAL`` error code. The number -zero always selects the bridge chip itself, e. g. the chip connected to -the PCI or USB bus. Non-zero numbers identify specific parts of the -bridge chip such as an AC97 register block. - -When ``match.type`` is ``V4L2_CHIP_MATCH_SUBDEV``, ``match.addr`` -selects the nth sub-device. This allows you to enumerate over all -sub-devices. - -On success, the ``name`` field will contain a chip name and the -``flags`` field will contain ``V4L2_CHIP_FL_READABLE`` if the driver -supports reading registers from the device or ``V4L2_CHIP_FL_WRITABLE`` -if the driver supports writing registers to the device. - -We recommended the v4l2-dbg utility over calling this ioctl directly. It -is available from the LinuxTV v4l-dvb repository; see -`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access -instructions. - - -.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}| - -.. _name-v4l2-dbg-match: - -.. flat-table:: struct v4l2_dbg_match - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - See :ref:`name-chip-match-types` for a list of possible types. - * - union { - - (anonymous) - * - __u32 - - ``addr`` - - Match a chip by this number, interpreted according to the ``type`` - field. - * - char - - ``name[32]`` - - Match a chip by this name, interpreted according to the ``type`` - field. Currently unused. - * - } - - - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_dbg_chip_info - -.. flat-table:: struct v4l2_dbg_chip_info - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - struct v4l2_dbg_match - - ``match`` - - How to match the chip, see :ref:`name-v4l2-dbg-match`. - * - char - - ``name[32]`` - - The name of the chip. - * - __u32 - - ``flags`` - - Set by the driver. If ``V4L2_CHIP_FL_READABLE`` is set, then the - driver supports reading registers from the device. If - ``V4L2_CHIP_FL_WRITABLE`` is set, then it supports writing - registers. - * - __u32 - - ``reserved[8]`` - - Reserved fields, both application and driver must set these to 0. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _name-chip-match-types: - -.. flat-table:: Chip Match Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_CHIP_MATCH_BRIDGE`` - - 0 - - Match the nth chip on the card, zero for the bridge chip. Does not - match sub-devices. - * - ``V4L2_CHIP_MATCH_SUBDEV`` - - 4 - - Match the nth sub-device. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The ``match_type`` is invalid or no device could be matched. diff --git a/Documentation/media/uapi/v4l/vidioc-dbg-g-register.rst b/Documentation/media/uapi/v4l/vidioc-dbg-g-register.rst deleted file mode 100644 index 112597c6cad2..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-dbg-g-register.rst +++ /dev/null @@ -1,171 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_DBG_G_REGISTER: - -************************************************** -ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER -************************************************** - -Name -==== - -VIDIOC_DBG_G_REGISTER - VIDIOC_DBG_S_REGISTER - Read or write hardware registers - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_DBG_G_REGISTER, struct v4l2_dbg_register *argp ) - :name: VIDIOC_DBG_G_REGISTER - -.. c:function:: int ioctl( int fd, VIDIOC_DBG_S_REGISTER, const struct v4l2_dbg_register *argp ) - :name: VIDIOC_DBG_S_REGISTER - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_dbg_register`. - - -Description -=========== - -.. note:: - - This is an :ref:`experimental` interface and may - change in the future. - -For driver debugging purposes these ioctls allow test applications to -access hardware registers directly. Regular applications must not use -them. - -Since writing or even reading registers can jeopardize the system -security, its stability and damage the hardware, both ioctls require -superuser privileges. Additionally the Linux kernel must be compiled -with the ``CONFIG_VIDEO_ADV_DEBUG`` option to enable these ioctls. - -To write a register applications must initialize all fields of a struct -:c:type:`v4l2_dbg_register` except for ``size`` and -call ``VIDIOC_DBG_S_REGISTER`` with a pointer to this structure. The -``match.type`` and ``match.addr`` or ``match.name`` fields select a chip -on the TV card, the ``reg`` field specifies a register number and the -``val`` field the value to be written into the register. - -To read a register applications must initialize the ``match.type``, -``match.addr`` or ``match.name`` and ``reg`` fields, and call -``VIDIOC_DBG_G_REGISTER`` with a pointer to this structure. On success -the driver stores the register value in the ``val`` field and the size -(in bytes) of the value in ``size``. - -When ``match.type`` is ``V4L2_CHIP_MATCH_BRIDGE``, ``match.addr`` -selects the nth non-sub-device chip on the TV card. The number zero -always selects the host chip, e. g. the chip connected to the PCI or USB -bus. You can find out which chips are present with the -:ref:`VIDIOC_DBG_G_CHIP_INFO` ioctl. - -When ``match.type`` is ``V4L2_CHIP_MATCH_SUBDEV``, ``match.addr`` -selects the nth sub-device. - -These ioctls are optional, not all drivers may support them. However -when a driver supports these ioctls it must also support -:ref:`VIDIOC_DBG_G_CHIP_INFO`. Conversely -it may support ``VIDIOC_DBG_G_CHIP_INFO`` but not these ioctls. - -``VIDIOC_DBG_G_REGISTER`` and ``VIDIOC_DBG_S_REGISTER`` were introduced -in Linux 2.6.21, but their API was changed to the one described here in -kernel 2.6.29. - -We recommended the v4l2-dbg utility over calling these ioctls directly. -It is available from the LinuxTV v4l-dvb repository; see -`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access -instructions. - - -.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}| - -.. c:type:: v4l2_dbg_match - -.. flat-table:: struct v4l2_dbg_match - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - See :ref:`chip-match-types` for a list of possible types. - * - union { - - (anonymous) - * - __u32 - - ``addr`` - - Match a chip by this number, interpreted according to the ``type`` - field. - * - char - - ``name[32]`` - - Match a chip by this name, interpreted according to the ``type`` - field. Currently unused. - * - } - - - - - -.. c:type:: v4l2_dbg_register - -.. flat-table:: struct v4l2_dbg_register - :header-rows: 0 - :stub-columns: 0 - - * - struct v4l2_dbg_match - - ``match`` - - How to match the chip, see :c:type:`v4l2_dbg_match`. - * - __u32 - - ``size`` - - The register size in bytes. - * - __u64 - - ``reg`` - - A register number. - * - __u64 - - ``val`` - - The value read from, or to be written into the register. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _chip-match-types: - -.. flat-table:: Chip Match Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_CHIP_MATCH_BRIDGE`` - - 0 - - Match the nth chip on the card, zero for the bridge chip. Does not - match sub-devices. - * - ``V4L2_CHIP_MATCH_SUBDEV`` - - 4 - - Match the nth sub-device. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EPERM - Insufficient permissions. Root privileges are required to execute - these ioctls. diff --git a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst deleted file mode 100644 index 784c5980da8d..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst +++ /dev/null @@ -1,226 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_DECODER_CMD: - -************************************************ -ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD -************************************************ - -Name -==== - -VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute an decoder command - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_DECODER_CMD, struct v4l2_decoder_cmd *argp ) - :name: VIDIOC_DECODER_CMD - - -.. c:function:: int ioctl( int fd, VIDIOC_TRY_DECODER_CMD, struct v4l2_decoder_cmd *argp ) - :name: VIDIOC_TRY_DECODER_CMD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - pointer to struct :c:type:`v4l2_decoder_cmd`. - - -Description -=========== - -These ioctls control an audio/video (usually MPEG-) decoder. -``VIDIOC_DECODER_CMD`` sends a command to the decoder, -``VIDIOC_TRY_DECODER_CMD`` can be used to try a command without actually -executing it. To send a command applications must initialize all fields -of a struct :c:type:`v4l2_decoder_cmd` and call -``VIDIOC_DECODER_CMD`` or ``VIDIOC_TRY_DECODER_CMD`` with a pointer to -this structure. - -The ``cmd`` field must contain the command code. Some commands use the -``flags`` field for additional information. - -A :ref:`write() <func-write>` or :ref:`VIDIOC_STREAMON` -call sends an implicit START command to the decoder if it has not been -started yet. Applies to both queues of mem2mem decoders. - -A :ref:`close() <func-close>` or :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` -call of a streaming file descriptor sends an implicit immediate STOP -command to the decoder, and all buffered data is discarded. Applies to both -queues of mem2mem decoders. - -In principle, these ioctls are optional, not all drivers may support them. They were -introduced in Linux 3.3. They are, however, mandatory for stateful mem2mem decoders -(as further documented in :ref:`decoder`). - - -.. tabularcolumns:: |p{1.1cm}|p{2.4cm}|p{1.2cm}|p{1.6cm}|p{10.6cm}| - -.. c:type:: v4l2_decoder_cmd - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_decoder_cmd - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 1 3 - - * - __u32 - - ``cmd`` - - - - The decoder command, see :ref:`decoder-cmds`. - * - __u32 - - ``flags`` - - - - Flags to go with the command. If no flags are defined for this - command, drivers and applications must set this field to zero. - * - union { - - (anonymous) - * - struct - - ``start`` - - - - Structure containing additional data for the - ``V4L2_DEC_CMD_START`` command. - * - - - __s32 - - ``speed`` - - Playback speed and direction. The playback speed is defined as - ``speed``/1000 of the normal speed. So 1000 is normal playback. - Negative numbers denote reverse playback, so -1000 does reverse - playback at normal speed. Speeds -1, 0 and 1 have special - meanings: speed 0 is shorthand for 1000 (normal playback). A speed - of 1 steps just one frame forward, a speed of -1 steps just one - frame back. - * - - - __u32 - - ``format`` - - Format restrictions. This field is set by the driver, not the - application. Possible values are ``V4L2_DEC_START_FMT_NONE`` if - there are no format restrictions or ``V4L2_DEC_START_FMT_GOP`` if - the decoder operates on full GOPs (*Group Of Pictures*). This is - usually the case for reverse playback: the decoder needs full - GOPs, which it can then play in reverse order. So to implement - reverse playback the application must feed the decoder the last - GOP in the video file, then the GOP before that, etc. etc. - * - struct - - ``stop`` - - - - Structure containing additional data for the ``V4L2_DEC_CMD_STOP`` - command. - * - - - __u64 - - ``pts`` - - Stop playback at this ``pts`` or immediately if the playback is - already past that timestamp. Leave to 0 if you want to stop after - the last frame was decoded. - * - struct - - ``raw`` - * - - - __u32 - - ``data``\ [16] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - * - } - - - - - -.. tabularcolumns:: |p{5.6cm}|p{0.6cm}|p{11.3cm}| - -.. _decoder-cmds: - -.. flat-table:: Decoder Commands - :header-rows: 0 - :stub-columns: 0 - :widths: 56 6 113 - - * - ``V4L2_DEC_CMD_START`` - - 0 - - Start the decoder. When the decoder is already running or paused, - this command will just change the playback speed. That means that - calling ``V4L2_DEC_CMD_START`` when the decoder was paused will - *not* resume the decoder. You have to explicitly call - ``V4L2_DEC_CMD_RESUME`` for that. This command has one flag: - ``V4L2_DEC_CMD_START_MUTE_AUDIO``. If set, then audio will be - muted when playing back at a non-standard speed. - - For a device implementing the :ref:`decoder`, once the drain sequence - is initiated with the ``V4L2_DEC_CMD_STOP`` command, it must be driven - to completion before this command can be invoked. Any attempt to - invoke the command while the drain sequence is in progress will trigger - an ``EBUSY`` error code. The command may be also used to restart the - decoder in case of an implicit stop initiated by the decoder itself, - without the ``V4L2_DEC_CMD_STOP`` being called explicitly. See - :ref:`decoder` for more details. - * - ``V4L2_DEC_CMD_STOP`` - - 1 - - Stop the decoder. When the decoder is already stopped, this - command does nothing. This command has two flags: if - ``V4L2_DEC_CMD_STOP_TO_BLACK`` is set, then the decoder will set - the picture to black after it stopped decoding. Otherwise the last - image will repeat. If - ``V4L2_DEC_CMD_STOP_IMMEDIATELY`` is set, then the decoder stops - immediately (ignoring the ``pts`` value), otherwise it will keep - decoding until timestamp >= pts or until the last of the pending - data from its internal buffers was decoded. - - For a device implementing the :ref:`decoder`, the command will initiate - the drain sequence as documented in :ref:`decoder`. No flags or other - arguments are accepted in this case. Any attempt to invoke the command - again before the sequence completes will trigger an ``EBUSY`` error - code. - * - ``V4L2_DEC_CMD_PAUSE`` - - 2 - - Pause the decoder. When the decoder has not been started yet, the - driver will return an ``EPERM`` error code. When the decoder is - already paused, this command does nothing. This command has one - flag: if ``V4L2_DEC_CMD_PAUSE_TO_BLACK`` is set, then set the - decoder output to black when paused. - * - ``V4L2_DEC_CMD_RESUME`` - - 3 - - Resume decoding after a PAUSE command. When the decoder has not - been started yet, the driver will return an ``EPERM`` error code. When - the decoder is already running, this command does nothing. No - flags are defined for this command. - * - ``V4L2_DEC_CMD_FLUSH`` - - 4 - - Flush any held capture buffers. Only valid for stateless decoders. - This command is typically used when the application reached the - end of the stream and the last output buffer had the - ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag set. This would prevent - dequeueing the capture buffer containing the last decoded frame. - So this command can be used to explicitly flush that final decoded - frame. This command does nothing if there are no held capture buffers. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - A drain sequence of a device implementing the :ref:`decoder` is still in - progress. It is not allowed to issue another decoder command until it - completes. - -EINVAL - The ``cmd`` field is invalid. - -EPERM - The application sent a PAUSE or RESUME command when the decoder was - not running. diff --git a/Documentation/media/uapi/v4l/vidioc-dqevent.rst b/Documentation/media/uapi/v4l/vidioc-dqevent.rst deleted file mode 100644 index 2f37d255352a..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-dqevent.rst +++ /dev/null @@ -1,391 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_DQEVENT: - -******************** -ioctl VIDIOC_DQEVENT -******************** - -Name -==== - -VIDIOC_DQEVENT - Dequeue event - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_DQEVENT, struct v4l2_event *argp ) - :name: VIDIOC_DQEVENT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_event`. - - -Description -=========== - -Dequeue an event from a video device. No input is required for this -ioctl. All the fields of the struct :c:type:`v4l2_event` -structure are filled by the driver. The file handle will also receive -exceptions which the application may get by e.g. using the select system -call. - - -.. tabularcolumns:: |p{3.0cm}|p{4.4cm}|p{2.4cm}|p{7.7cm}| - -.. c:type:: v4l2_event - -.. cssclass: longtable - -.. flat-table:: struct v4l2_event - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of the event, see :ref:`event-type`. - * - union { - - ``u`` - * - struct :c:type:`v4l2_event_vsync` - - ``vsync`` - - Event data for event ``V4L2_EVENT_VSYNC``. - * - struct :c:type:`v4l2_event_ctrl` - - ``ctrl`` - - Event data for event ``V4L2_EVENT_CTRL``. - * - struct :c:type:`v4l2_event_frame_sync` - - ``frame_sync`` - - Event data for event ``V4L2_EVENT_FRAME_SYNC``. - * - struct :c:type:`v4l2_event_motion_det` - - ``motion_det`` - - Event data for event V4L2_EVENT_MOTION_DET. - * - struct :c:type:`v4l2_event_src_change` - - ``src_change`` - - Event data for event V4L2_EVENT_SOURCE_CHANGE. - * - __u8 - - ``data``\ [64] - - Event data. Defined by the event type. The union should be used to - define easily accessible type for events. - * - } - - - * - __u32 - - ``pending`` - - Number of pending events excluding this one. - * - __u32 - - ``sequence`` - - Event sequence number. The sequence number is incremented for - every subscribed event that takes place. If sequence numbers are - not contiguous it means that events have been lost. - * - struct timespec - - ``timestamp`` - - Event timestamp. The timestamp has been taken from the - ``CLOCK_MONOTONIC`` clock. To access the same clock outside V4L2, - use :c:func:`clock_gettime`. - * - u32 - - ``id`` - - The ID associated with the event source. If the event does not - have an associated ID (this depends on the event type), then this - is 0. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. cssclass:: longtable - -.. _event-type: - -.. flat-table:: Event Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_EVENT_ALL`` - - 0 - - All events. V4L2_EVENT_ALL is valid only for - VIDIOC_UNSUBSCRIBE_EVENT for unsubscribing all events at once. - * - ``V4L2_EVENT_VSYNC`` - - 1 - - This event is triggered on the vertical sync. This event has a - struct :c:type:`v4l2_event_vsync` associated - with it. - * - ``V4L2_EVENT_EOS`` - - 2 - - This event is triggered when the end of a stream is reached. This - is typically used with MPEG decoders to report to the application - when the last of the MPEG stream has been decoded. - * - ``V4L2_EVENT_CTRL`` - - 3 - - This event requires that the ``id`` matches the control ID from - which you want to receive events. This event is triggered if the - control's value changes, if a button control is pressed or if the - control's flags change. This event has a struct - :c:type:`v4l2_event_ctrl` associated with it. - This struct contains much of the same information as struct - :ref:`v4l2_queryctrl <v4l2-queryctrl>` and struct - :c:type:`v4l2_control`. - - If the event is generated due to a call to - :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` or - :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, then the - event will *not* be sent to the file handle that called the ioctl - function. This prevents nasty feedback loops. If you *do* want to - get the event, then set the ``V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK`` - flag. - - This event type will ensure that no information is lost when more - events are raised than there is room internally. In that case the - struct :c:type:`v4l2_event_ctrl` of the - second-oldest event is kept, but the ``changes`` field of the - second-oldest event is ORed with the ``changes`` field of the - oldest event. - * - ``V4L2_EVENT_FRAME_SYNC`` - - 4 - - Triggered immediately when the reception of a frame has begun. - This event has a struct - :c:type:`v4l2_event_frame_sync` - associated with it. - - If the hardware needs to be stopped in the case of a buffer - underrun it might not be able to generate this event. In such - cases the ``frame_sequence`` field in struct - :c:type:`v4l2_event_frame_sync` will not - be incremented. This causes two consecutive frame sequence numbers - to have n times frame interval in between them. - * - ``V4L2_EVENT_SOURCE_CHANGE`` - - 5 - - This event is triggered when a source parameter change is detected - during runtime by the video device. It can be a runtime resolution - change triggered by a video decoder or the format change happening - on an input connector. This event requires that the ``id`` matches - the input index (when used with a video device node) or the pad - index (when used with a subdevice node) from which you want to - receive events. - - This event has a struct - :c:type:`v4l2_event_src_change` - associated with it. The ``changes`` bitfield denotes what has - changed for the subscribed pad. If multiple events occurred before - application could dequeue them, then the changes will have the - ORed value of all the events generated. - * - ``V4L2_EVENT_MOTION_DET`` - - 6 - - Triggered whenever the motion detection state for one or more of - the regions changes. This event has a struct - :c:type:`v4l2_event_motion_det` - associated with it. - * - ``V4L2_EVENT_PRIVATE_START`` - - 0x08000000 - - Base event number for driver-private events. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_event_vsync - -.. flat-table:: struct v4l2_event_vsync - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u8 - - ``field`` - - The upcoming field. See enum :c:type:`v4l2_field`. - - - -.. tabularcolumns:: |p{3.5cm}|p{3.0cm}|p{1.8cm}|p{8.5cm}| - -.. c:type:: v4l2_event_ctrl - -.. flat-table:: struct v4l2_event_ctrl - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``changes`` - - A bitmask that tells what has changed. See - :ref:`ctrl-changes-flags`. - * - __u32 - - ``type`` - - The type of the control. See enum - :c:type:`v4l2_ctrl_type`. - * - union { - - (anonymous) - * - __s32 - - ``value`` - - The 32-bit value of the control for 32-bit control types. This is - 0 for string controls since the value of a string cannot be passed - using :ref:`VIDIOC_DQEVENT`. - * - __s64 - - ``value64`` - - The 64-bit value of the control for 64-bit control types. - * - } - - - * - __u32 - - ``flags`` - - The control flags. See :ref:`control-flags`. - * - __s32 - - ``minimum`` - - The minimum value of the control. See struct - :ref:`v4l2_queryctrl <v4l2-queryctrl>`. - * - __s32 - - ``maximum`` - - The maximum value of the control. See struct - :ref:`v4l2_queryctrl <v4l2-queryctrl>`. - * - __s32 - - ``step`` - - The step value of the control. See struct - :ref:`v4l2_queryctrl <v4l2-queryctrl>`. - * - __s32 - - ``default_value`` - - The default value value of the control. See struct - :ref:`v4l2_queryctrl <v4l2-queryctrl>`. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_event_frame_sync - -.. flat-table:: struct v4l2_event_frame_sync - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``frame_sequence`` - - The sequence number of the frame being received. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_event_src_change - -.. flat-table:: struct v4l2_event_src_change - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``changes`` - - A bitmask that tells what has changed. See - :ref:`src-changes-flags`. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_event_motion_det - -.. flat-table:: struct v4l2_event_motion_det - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``flags`` - - Currently only one flag is available: if - ``V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ`` is set, then the - ``frame_sequence`` field is valid, otherwise that field should be - ignored. - * - __u32 - - ``frame_sequence`` - - The sequence number of the frame being received. Only valid if the - ``V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ`` flag was set. - * - __u32 - - ``region_mask`` - - The bitmask of the regions that reported motion. There is at least - one region. If this field is 0, then no motion was detected at - all. If there is no ``V4L2_CID_DETECT_MD_REGION_GRID`` control - (see :ref:`detect-controls`) to assign a different region to - each cell in the motion detection grid, then that all cells are - automatically assigned to the default region 0. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _ctrl-changes-flags: - -.. flat-table:: Control Changes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_EVENT_CTRL_CH_VALUE`` - - 0x0001 - - This control event was triggered because the value of the control - changed. Special cases: Volatile controls do no generate this - event; If a control has the ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE`` - flag set, then this event is sent as well, regardless its value. - * - ``V4L2_EVENT_CTRL_CH_FLAGS`` - - 0x0002 - - This control event was triggered because the control flags - changed. - * - ``V4L2_EVENT_CTRL_CH_RANGE`` - - 0x0004 - - This control event was triggered because the minimum, maximum, - step or the default value of the control changed. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _src-changes-flags: - -.. flat-table:: Source Changes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_EVENT_SRC_CH_RESOLUTION`` - - 0x0001 - - This event gets triggered when a resolution change is detected at - an input. This can come from an input connector or from a video - decoder. Applications will have to query the new resolution (if - any, the signal may also have been lost). - - For stateful decoders follow the guidelines in :ref:`decoder`. - Video Capture devices have to query the new timings using - :ref:`VIDIOC_QUERY_DV_TIMINGS` or - :ref:`VIDIOC_QUERYSTD <VIDIOC_QUERYSTD>`. - - *Important*: even if the new video timings appear identical to the old - ones, receiving this event indicates that there was an issue with the - video signal and you must stop and restart streaming - (:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` - followed by :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`). The reason is - that many Video Capture devices are not able to recover from a temporary - loss of signal and so restarting streaming I/O is required in order for - the hardware to synchronize to the video signal. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-dv-timings-cap.rst b/Documentation/media/uapi/v4l/vidioc-dv-timings-cap.rst deleted file mode 100644 index 1d0acbf14c4f..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-dv-timings-cap.rst +++ /dev/null @@ -1,169 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_DV_TIMINGS_CAP: - -********************************************************* -ioctl VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP -********************************************************* - -Name -==== - -VIDIOC_DV_TIMINGS_CAP - VIDIOC_SUBDEV_DV_TIMINGS_CAP - The capabilities of the Digital Video receiver/transmitter - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_DV_TIMINGS_CAP, struct v4l2_dv_timings_cap *argp ) - :name: VIDIOC_DV_TIMINGS_CAP - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_DV_TIMINGS_CAP, struct v4l2_dv_timings_cap *argp ) - :name: VIDIOC_SUBDEV_DV_TIMINGS_CAP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_dv_timings_cap`. - - -Description -=========== - -To query the capabilities of the DV receiver/transmitter applications -initialize the ``pad`` field to 0, zero the reserved array of struct -:c:type:`v4l2_dv_timings_cap` and call the -``VIDIOC_DV_TIMINGS_CAP`` ioctl on a video node and the driver will fill -in the structure. - -.. note:: - - Drivers may return different values after - switching the video input or output. - -When implemented by the driver DV capabilities of subdevices can be -queried by calling the ``VIDIOC_SUBDEV_DV_TIMINGS_CAP`` ioctl directly -on a subdevice node. The capabilities are specific to inputs (for DV -receivers) or outputs (for DV transmitters), applications must specify -the desired pad number in the struct -:c:type:`v4l2_dv_timings_cap` ``pad`` field and -zero the ``reserved`` array. Attempts to query capabilities on a pad -that doesn't support them will return an ``EINVAL`` error code. - - -.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{13.3cm}| - -.. c:type:: v4l2_bt_timings_cap - -.. flat-table:: struct v4l2_bt_timings_cap - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``min_width`` - - Minimum width of the active video in pixels. - * - __u32 - - ``max_width`` - - Maximum width of the active video in pixels. - * - __u32 - - ``min_height`` - - Minimum height of the active video in lines. - * - __u32 - - ``max_height`` - - Maximum height of the active video in lines. - * - __u64 - - ``min_pixelclock`` - - Minimum pixelclock frequency in Hz. - * - __u64 - - ``max_pixelclock`` - - Maximum pixelclock frequency in Hz. - * - __u32 - - ``standards`` - - The video standard(s) supported by the hardware. See - :ref:`dv-bt-standards` for a list of standards. - * - __u32 - - ``capabilities`` - - Several flags giving more information about the capabilities. See - :ref:`dv-bt-cap-capabilities` for a description of the flags. - * - __u32 - - ``reserved``\ [16] - - Reserved for future extensions. - Drivers must set the array to zero. - - - -.. tabularcolumns:: |p{1.0cm}|p{4.0cm}|p{3.5cm}|p{9.2cm}| - -.. c:type:: v4l2_dv_timings_cap - -.. flat-table:: struct v4l2_dv_timings_cap - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of DV timings as listed in :ref:`dv-timing-types`. - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. This field is - only used when operating on a subdevice node. When operating on a - video node applications must set this field to zero. - * - __u32 - - ``reserved``\ [2] - - Reserved for future extensions. - - Drivers and applications must set the array to zero. - * - union { - - (anonymous) - * - struct :c:type:`v4l2_bt_timings_cap` - - ``bt`` - - BT.656/1120 timings capabilities of the hardware. - * - __u32 - - ``raw_data``\ [32] - * - } - - - -.. tabularcolumns:: |p{7.0cm}|p{10.5cm}| - -.. _dv-bt-cap-capabilities: - -.. flat-table:: DV BT Timing capabilities - :header-rows: 0 - :stub-columns: 0 - - * - Flag - - Description - * - - - - * - ``V4L2_DV_BT_CAP_INTERLACED`` - - Interlaced formats are supported. - * - ``V4L2_DV_BT_CAP_PROGRESSIVE`` - - Progressive formats are supported. - * - ``V4L2_DV_BT_CAP_REDUCED_BLANKING`` - - CVT/GTF specific: the timings can make use of reduced blanking - (CVT) or the 'Secondary GTF' curve (GTF). - * - ``V4L2_DV_BT_CAP_CUSTOM`` - - Can support non-standard timings, i.e. timings not belonging to - the standards set in the ``standards`` field. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-encoder-cmd.rst b/Documentation/media/uapi/v4l/vidioc-encoder-cmd.rst deleted file mode 100644 index c313ca8b8cb5..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-encoder-cmd.rst +++ /dev/null @@ -1,168 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENCODER_CMD: - -************************************************ -ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD -************************************************ - -Name -==== - -VIDIOC_ENCODER_CMD - VIDIOC_TRY_ENCODER_CMD - Execute an encoder command - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENCODER_CMD, struct v4l2_encoder_cmd *argp ) - :name: VIDIOC_ENCODER_CMD - -.. c:function:: int ioctl( int fd, VIDIOC_TRY_ENCODER_CMD, struct v4l2_encoder_cmd *argp ) - :name: VIDIOC_TRY_ENCODER_CMD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_encoder_cmd`. - -Description -=========== - -These ioctls control an audio/video (usually MPEG-) encoder. -``VIDIOC_ENCODER_CMD`` sends a command to the encoder, -``VIDIOC_TRY_ENCODER_CMD`` can be used to try a command without actually -executing it. - -To send a command applications must initialize all fields of a struct -:c:type:`v4l2_encoder_cmd` and call -``VIDIOC_ENCODER_CMD`` or ``VIDIOC_TRY_ENCODER_CMD`` with a pointer to -this structure. - -The ``cmd`` field must contain the command code. The ``flags`` field is -currently only used by the STOP command and contains one bit: If the -``V4L2_ENC_CMD_STOP_AT_GOP_END`` flag is set, encoding will continue -until the end of the current *Group Of Pictures*, otherwise it will stop -immediately. - -A :ref:`read() <func-read>` or :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>` -call sends an implicit START command to the encoder if it has not been -started yet. After a STOP command, :ref:`read() <func-read>` calls will read -the remaining data buffered by the driver. When the buffer is empty, -:ref:`read() <func-read>` will return zero and the next :ref:`read() <func-read>` -call will restart the encoder. - -A :ref:`close() <func-close>` or :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` -call of a streaming file descriptor sends an implicit immediate STOP to -the encoder, and all buffered data is discarded. - -These ioctls are optional, not all drivers may support them. They were -introduced in Linux 2.6.21. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_encoder_cmd - -.. flat-table:: struct v4l2_encoder_cmd - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``cmd`` - - The encoder command, see :ref:`encoder-cmds`. - * - __u32 - - ``flags`` - - Flags to go with the command, see :ref:`encoder-flags`. If no - flags are defined for this command, drivers and applications must - set this field to zero. - * - __u32 - - ``data``\ [8] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _encoder-cmds: - -.. flat-table:: Encoder Commands - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_ENC_CMD_START`` - - 0 - - Start the encoder. When the encoder is already running or paused, - this command does nothing. No flags are defined for this command. - * - ``V4L2_ENC_CMD_STOP`` - - 1 - - Stop the encoder. When the ``V4L2_ENC_CMD_STOP_AT_GOP_END`` flag - is set, encoding will continue until the end of the current *Group - Of Pictures*, otherwise encoding will stop immediately. When the - encoder is already stopped, this command does nothing. mem2mem - encoders will send a ``V4L2_EVENT_EOS`` event when the last frame - has been encoded and all frames are ready to be dequeued and will - set the ``V4L2_BUF_FLAG_LAST`` buffer flag on the last buffer of - the capture queue to indicate there will be no new buffers - produced to dequeue. This buffer may be empty, indicated by the - driver setting the ``bytesused`` field to 0. Once the - ``V4L2_BUF_FLAG_LAST`` flag was set, the - :ref:`VIDIOC_DQBUF <VIDIOC_QBUF>` ioctl will not block anymore, - but return an ``EPIPE`` error code. - * - ``V4L2_ENC_CMD_PAUSE`` - - 2 - - Pause the encoder. When the encoder has not been started yet, the - driver will return an ``EPERM`` error code. When the encoder is - already paused, this command does nothing. No flags are defined - for this command. - * - ``V4L2_ENC_CMD_RESUME`` - - 3 - - Resume encoding after a PAUSE command. When the encoder has not - been started yet, the driver will return an ``EPERM`` error code. When - the encoder is already running, this command does nothing. No - flags are defined for this command. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _encoder-flags: - -.. flat-table:: Encoder Command Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_ENC_CMD_STOP_AT_GOP_END`` - - 0x0001 - - Stop encoding at the end of the current *Group Of Pictures*, - rather than immediately. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The ``cmd`` field is invalid. - -EPERM - The application sent a PAUSE or RESUME command when the encoder was - not running. diff --git a/Documentation/media/uapi/v4l/vidioc-enum-dv-timings.rst b/Documentation/media/uapi/v4l/vidioc-enum-dv-timings.rst deleted file mode 100644 index 0b286e19b46b..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enum-dv-timings.rst +++ /dev/null @@ -1,114 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUM_DV_TIMINGS: - -*********************************************************** -ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS -*********************************************************** - -Name -==== - -VIDIOC_ENUM_DV_TIMINGS - VIDIOC_SUBDEV_ENUM_DV_TIMINGS - Enumerate supported Digital Video timings - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUM_DV_TIMINGS, struct v4l2_enum_dv_timings *argp ) - :name: VIDIOC_ENUM_DV_TIMINGS - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_ENUM_DV_TIMINGS, struct v4l2_enum_dv_timings *argp ) - :name: VIDIOC_SUBDEV_ENUM_DV_TIMINGS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_enum_dv_timings`. - - -Description -=========== - -While some DV receivers or transmitters support a wide range of timings, -others support only a limited number of timings. With this ioctl -applications can enumerate a list of known supported timings. Call -:ref:`VIDIOC_DV_TIMINGS_CAP` to check if it -also supports other standards or even custom timings that are not in -this list. - -To query the available timings, applications initialize the ``index`` -field, set the ``pad`` field to 0, zero the reserved array of struct -:c:type:`v4l2_enum_dv_timings` and call the -``VIDIOC_ENUM_DV_TIMINGS`` ioctl on a video node with a pointer to this -structure. Drivers fill the rest of the structure or return an ``EINVAL`` -error code when the index is out of bounds. To enumerate all supported -DV timings, applications shall begin at index zero, incrementing by one -until the driver returns ``EINVAL``. - -.. note:: - - Drivers may enumerate a different set of DV timings after - switching the video input or output. - -When implemented by the driver DV timings of subdevices can be queried -by calling the ``VIDIOC_SUBDEV_ENUM_DV_TIMINGS`` ioctl directly on a -subdevice node. The DV timings are specific to inputs (for DV receivers) -or outputs (for DV transmitters), applications must specify the desired -pad number in the struct -:c:type:`v4l2_enum_dv_timings` ``pad`` field. -Attempts to enumerate timings on a pad that doesn't support them will -return an ``EINVAL`` error code. - - -.. c:type:: v4l2_enum_dv_timings - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_enum_dv_timings - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Number of the DV timings, set by the application. - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. This field is - only used when operating on a subdevice node. When operating on a - video node applications must set this field to zero. - * - __u32 - - ``reserved``\ [2] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - * - struct :c:type:`v4l2_dv_timings` - - ``timings`` - - The timings. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_enum_dv_timings` - ``index`` is out of bounds or the ``pad`` number is invalid. - -ENODATA - Digital video presets are not supported for this input or output. diff --git a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst b/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst deleted file mode 100644 index 8ca6ab701e4a..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enum-fmt.rst +++ /dev/null @@ -1,159 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUM_FMT: - -********************* -ioctl VIDIOC_ENUM_FMT -********************* - -Name -==== - -VIDIOC_ENUM_FMT - Enumerate image formats - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUM_FMT, struct v4l2_fmtdesc *argp ) - :name: VIDIOC_ENUM_FMT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_fmtdesc`. - - -Description -=========== - -To enumerate image formats applications initialize the ``type`` and -``index`` field of struct :c:type:`v4l2_fmtdesc` and call -the :ref:`VIDIOC_ENUM_FMT` ioctl with a pointer to this structure. Drivers -fill the rest of the structure or return an ``EINVAL`` error code. All -formats are enumerable by beginning at index zero and incrementing by -one until ``EINVAL`` is returned. If applicable, drivers shall return -formats in preference order, where preferred formats are returned before -(that is, with lower ``index`` value) less-preferred formats. - -.. note:: - - After switching input or output the list of enumerated image - formats may be different. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_fmtdesc - -.. flat-table:: struct v4l2_fmtdesc - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Number of the format in the enumeration, set by the application. - This is in no way related to the ``pixelformat`` field. - * - __u32 - - ``type`` - - Type of the data stream, set by the application. Only these types - are valid here: ``V4L2_BUF_TYPE_VIDEO_CAPTURE``, - ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``, - ``V4L2_BUF_TYPE_VIDEO_OUTPUT``, - ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``, - ``V4L2_BUF_TYPE_VIDEO_OVERLAY``, - ``V4L2_BUF_TYPE_SDR_CAPTURE``, - ``V4L2_BUF_TYPE_SDR_OUTPUT`` and - ``V4L2_BUF_TYPE_META_CAPTURE``. - See :c:type:`v4l2_buf_type`. - * - __u32 - - ``flags`` - - See :ref:`fmtdesc-flags` - * - __u8 - - ``description``\ [32] - - Description of the format, a NUL-terminated ASCII string. This - information is intended for the user, for example: "YUV 4:2:2". - * - __u32 - - ``pixelformat`` - - The image format identifier. This is a four character code as - computed by the v4l2_fourcc() macro: - * - :cspan:`2` - - .. _v4l2-fourcc: - - ``#define v4l2_fourcc(a,b,c,d)`` - - ``(((__u32)(a)<<0)|((__u32)(b)<<8)|((__u32)(c)<<16)|((__u32)(d)<<24))`` - - Several image formats are already defined by this specification in - :ref:`pixfmt`. - - .. attention:: - - These codes are not the same as those used - in the Windows world. - * - __u32 - - ``reserved``\ [4] - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _fmtdesc-flags: - -.. flat-table:: Image Format Description Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_FMT_FLAG_COMPRESSED`` - - 0x0001 - - This is a compressed format. - * - ``V4L2_FMT_FLAG_EMULATED`` - - 0x0002 - - This format is not native to the device but emulated through - software (usually libv4l2), where possible try to use a native - format instead for better performance. - * - ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` - - 0x0004 - - The hardware decoder for this compressed bytestream format (aka coded - format) is capable of parsing a continuous bytestream. Applications do - not need to parse the bytestream themselves to find the boundaries - between frames/fields. This flag can only be used in combination with - the ``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to compressed - formats only. This flag is valid for stateful decoders only. - * - ``V4L2_FMT_FLAG_DYN_RESOLUTION`` - - 0x0008 - - Dynamic resolution switching is supported by the device for this - compressed bytestream format (aka coded format). It will notify the user - via the event ``V4L2_EVENT_SOURCE_CHANGE`` when changes in the video - parameters are detected. This flag can only be used in combination - with the ``V4L2_FMT_FLAG_COMPRESSED`` flag, since this applies to - compressed formats only. It is also only applies to stateful codecs. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_fmtdesc` ``type`` is not - supported or the ``index`` is out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-enum-frameintervals.rst b/Documentation/media/uapi/v4l/vidioc-enum-frameintervals.rst deleted file mode 100644 index 563a67cddeca..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enum-frameintervals.rst +++ /dev/null @@ -1,203 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUM_FRAMEINTERVALS: - -******************************** -ioctl VIDIOC_ENUM_FRAMEINTERVALS -******************************** - -Name -==== - -VIDIOC_ENUM_FRAMEINTERVALS - Enumerate frame intervals - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUM_FRAMEINTERVALS, struct v4l2_frmivalenum *argp ) - :name: VIDIOC_ENUM_FRAMEINTERVALS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_frmivalenum` - that contains a pixel format and size and receives a frame interval. - - -Description -=========== - -This ioctl allows applications to enumerate all frame intervals that the -device supports for the given pixel format and frame size. - -The supported pixel formats and frame sizes can be obtained by using the -:ref:`VIDIOC_ENUM_FMT` and -:ref:`VIDIOC_ENUM_FRAMESIZES` functions. - -The return value and the content of the ``v4l2_frmivalenum.type`` field -depend on the type of frame intervals the device supports. Here are the -semantics of the function for the different cases: - -- **Discrete:** The function returns success if the given index value - (zero-based) is valid. The application should increase the index by - one for each call until ``EINVAL`` is returned. The - `v4l2_frmivalenum.type` field is set to - `V4L2_FRMIVAL_TYPE_DISCRETE` by the driver. Of the union only - the `discrete` member is valid. - -- **Step-wise:** The function returns success if the given index value - is zero and ``EINVAL`` for any other index value. The - ``v4l2_frmivalenum.type`` field is set to - ``V4L2_FRMIVAL_TYPE_STEPWISE`` by the driver. Of the union only the - ``stepwise`` member is valid. - -- **Continuous:** This is a special case of the step-wise type above. - The function returns success if the given index value is zero and - ``EINVAL`` for any other index value. The ``v4l2_frmivalenum.type`` - field is set to ``V4L2_FRMIVAL_TYPE_CONTINUOUS`` by the driver. Of - the union only the ``stepwise`` member is valid and the ``step`` - value is set to 1. - -When the application calls the function with index zero, it must check -the ``type`` field to determine the type of frame interval enumeration -the device supports. Only for the ``V4L2_FRMIVAL_TYPE_DISCRETE`` type -does it make sense to increase the index value to receive more frame -intervals. - -.. note:: - - The order in which the frame intervals are returned has no - special meaning. In particular does it not say anything about potential - default frame intervals. - -Applications can assume that the enumeration data does not change -without any interaction from the application itself. This means that the -enumeration data is consistent if the application does not perform any -other ioctl calls while it runs the frame interval enumeration. - -.. note:: - - **Frame intervals and frame rates:** The V4L2 API uses frame - intervals instead of frame rates. Given the frame interval the frame - rate can be computed as follows: - - :: - - frame_rate = 1 / frame_interval - - -Structs -======= - -In the structs below, *IN* denotes a value that has to be filled in by -the application, *OUT* denotes values that the driver fills in. The -application should zero out all members except for the *IN* fields. - - -.. c:type:: v4l2_frmival_stepwise - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_frmival_stepwise - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - struct :c:type:`v4l2_fract` - - ``min`` - - Minimum frame interval [s]. - * - struct :c:type:`v4l2_fract` - - ``max`` - - Maximum frame interval [s]. - * - struct :c:type:`v4l2_fract` - - ``step`` - - Frame interval step size [s]. - - - -.. c:type:: v4l2_frmivalenum - -.. tabularcolumns:: |p{1.8cm}|p{4.4cm}|p{2.4cm}|p{8.9cm}| - -.. flat-table:: struct v4l2_frmivalenum - :header-rows: 0 - :stub-columns: 0 - - * - __u32 - - ``index`` - - IN: Index of the given frame interval in the enumeration. - * - __u32 - - ``pixel_format`` - - IN: Pixel format for which the frame intervals are enumerated. - * - __u32 - - ``width`` - - IN: Frame width for which the frame intervals are enumerated. - * - __u32 - - ``height`` - - IN: Frame height for which the frame intervals are enumerated. - * - __u32 - - ``type`` - - OUT: Frame interval type the device supports. - * - union { - - (anonymous) - - OUT: Frame interval with the given index. - * - struct :c:type:`v4l2_fract` - - ``discrete`` - - Frame interval [s]. - * - struct :c:type:`v4l2_frmival_stepwise` - - ``stepwise`` - - - * - } - - - - - * - __u32 - - ``reserved[2]`` - - - - Reserved space for future use. Must be zeroed by drivers and - applications. - - - -Enums -===== - - -.. c:type:: v4l2_frmivaltypes - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: enum v4l2_frmivaltypes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_FRMIVAL_TYPE_DISCRETE`` - - 1 - - Discrete frame interval. - * - ``V4L2_FRMIVAL_TYPE_CONTINUOUS`` - - 2 - - Continuous frame interval. - * - ``V4L2_FRMIVAL_TYPE_STEPWISE`` - - 3 - - Step-wise defined frame interval. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-enum-framesizes.rst b/Documentation/media/uapi/v4l/vidioc-enum-framesizes.rst deleted file mode 100644 index cd97546a7122..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enum-framesizes.rst +++ /dev/null @@ -1,213 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUM_FRAMESIZES: - -**************************** -ioctl VIDIOC_ENUM_FRAMESIZES -**************************** - -Name -==== - -VIDIOC_ENUM_FRAMESIZES - Enumerate frame sizes - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUM_FRAMESIZES, struct v4l2_frmsizeenum *argp ) - :name: VIDIOC_ENUM_FRAMESIZES - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_frmsizeenum` - that contains an index and pixel format and receives a frame width - and height. - - -Description -=========== - -This ioctl allows applications to enumerate all frame sizes (i. e. width -and height in pixels) that the device supports for the given pixel -format. - -The supported pixel formats can be obtained by using the -:ref:`VIDIOC_ENUM_FMT` function. - -The return value and the content of the ``v4l2_frmsizeenum.type`` field -depend on the type of frame sizes the device supports. Here are the -semantics of the function for the different cases: - -- **Discrete:** The function returns success if the given index value - (zero-based) is valid. The application should increase the index by - one for each call until ``EINVAL`` is returned. The - ``v4l2_frmsizeenum.type`` field is set to - ``V4L2_FRMSIZE_TYPE_DISCRETE`` by the driver. Of the union only the - ``discrete`` member is valid. - -- **Step-wise:** The function returns success if the given index value - is zero and ``EINVAL`` for any other index value. The - ``v4l2_frmsizeenum.type`` field is set to - ``V4L2_FRMSIZE_TYPE_STEPWISE`` by the driver. Of the union only the - ``stepwise`` member is valid. - -- **Continuous:** This is a special case of the step-wise type above. - The function returns success if the given index value is zero and - ``EINVAL`` for any other index value. The ``v4l2_frmsizeenum.type`` - field is set to ``V4L2_FRMSIZE_TYPE_CONTINUOUS`` by the driver. Of - the union only the ``stepwise`` member is valid and the - ``step_width`` and ``step_height`` values are set to 1. - -When the application calls the function with index zero, it must check -the ``type`` field to determine the type of frame size enumeration the -device supports. Only for the ``V4L2_FRMSIZE_TYPE_DISCRETE`` type does -it make sense to increase the index value to receive more frame sizes. - -.. note:: - - The order in which the frame sizes are returned has no special - meaning. In particular does it not say anything about potential default - format sizes. - -Applications can assume that the enumeration data does not change -without any interaction from the application itself. This means that the -enumeration data is consistent if the application does not perform any -other ioctl calls while it runs the frame size enumeration. - - -Structs -======= - -In the structs below, *IN* denotes a value that has to be filled in by -the application, *OUT* denotes values that the driver fills in. The -application should zero out all members except for the *IN* fields. - - -.. c:type:: v4l2_frmsize_discrete - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_frmsize_discrete - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``width`` - - Width of the frame [pixel]. - * - __u32 - - ``height`` - - Height of the frame [pixel]. - - - -.. c:type:: v4l2_frmsize_stepwise - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_frmsize_stepwise - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``min_width`` - - Minimum frame width [pixel]. - * - __u32 - - ``max_width`` - - Maximum frame width [pixel]. - * - __u32 - - ``step_width`` - - Frame width step size [pixel]. - * - __u32 - - ``min_height`` - - Minimum frame height [pixel]. - * - __u32 - - ``max_height`` - - Maximum frame height [pixel]. - * - __u32 - - ``step_height`` - - Frame height step size [pixel]. - - - -.. c:type:: v4l2_frmsizeenum - -.. tabularcolumns:: |p{1.4cm}|p{5.9cm}|p{2.3cm}|p{8.0cm}| - -.. flat-table:: struct v4l2_frmsizeenum - :header-rows: 0 - :stub-columns: 0 - - * - __u32 - - ``index`` - - IN: Index of the given frame size in the enumeration. - * - __u32 - - ``pixel_format`` - - IN: Pixel format for which the frame sizes are enumerated. - * - __u32 - - ``type`` - - OUT: Frame size type the device supports. - * - union { - - (anonymous) - - OUT: Frame size with the given index. - * - struct :c:type:`v4l2_frmsize_discrete` - - ``discrete`` - - - * - struct :c:type:`v4l2_frmsize_stepwise` - - ``stepwise`` - - - * - } - - - - - * - __u32 - - ``reserved[2]`` - - Reserved space for future use. Must be zeroed by drivers and - applications. - - - -Enums -===== - - -.. c:type:: v4l2_frmsizetypes - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: enum v4l2_frmsizetypes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_FRMSIZE_TYPE_DISCRETE`` - - 1 - - Discrete frame size. - * - ``V4L2_FRMSIZE_TYPE_CONTINUOUS`` - - 2 - - Continuous frame size. - * - ``V4L2_FRMSIZE_TYPE_STEPWISE`` - - 3 - - Step-wise defined frame size. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-enum-freq-bands.rst b/Documentation/media/uapi/v4l/vidioc-enum-freq-bands.rst deleted file mode 100644 index 0e97c09afe0e..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enum-freq-bands.rst +++ /dev/null @@ -1,150 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUM_FREQ_BANDS: - -**************************** -ioctl VIDIOC_ENUM_FREQ_BANDS -**************************** - -Name -==== - -VIDIOC_ENUM_FREQ_BANDS - Enumerate supported frequency bands - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUM_FREQ_BANDS, struct v4l2_frequency_band *argp ) - :name: VIDIOC_ENUM_FREQ_BANDS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_frequency_band`. - - -Description -=========== - -Enumerates the frequency bands that a tuner or modulator supports. To do -this applications initialize the ``tuner``, ``type`` and ``index`` -fields, and zero out the ``reserved`` array of a struct -:c:type:`v4l2_frequency_band` and call the -:ref:`VIDIOC_ENUM_FREQ_BANDS` ioctl with a pointer to this structure. - -This ioctl is supported if the ``V4L2_TUNER_CAP_FREQ_BANDS`` capability -of the corresponding tuner/modulator is set. - - -.. tabularcolumns:: |p{2.9cm}|p{2.9cm}|p{5.8cm}|p{2.9cm}|p{3.0cm}| - -.. c:type:: v4l2_frequency_band - -.. flat-table:: struct v4l2_frequency_band - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 1 1 - - * - __u32 - - ``tuner`` - - The tuner or modulator index number. This is the same value as in - the struct :c:type:`v4l2_input` ``tuner`` field and - the struct :c:type:`v4l2_tuner` ``index`` field, or - the struct :c:type:`v4l2_output` ``modulator`` field - and the struct :c:type:`v4l2_modulator` ``index`` - field. - * - __u32 - - ``type`` - - The tuner type. This is the same value as in the struct - :c:type:`v4l2_tuner` ``type`` field. The type must be - set to ``V4L2_TUNER_RADIO`` for ``/dev/radioX`` device nodes, and - to ``V4L2_TUNER_ANALOG_TV`` for all others. Set this field to - ``V4L2_TUNER_RADIO`` for modulators (currently only radio - modulators are supported). See :c:type:`v4l2_tuner_type` - * - __u32 - - ``index`` - - Identifies the frequency band, set by the application. - * - __u32 - - ``capability`` - - :cspan:`2` The tuner/modulator capability flags for this - frequency band, see :ref:`tuner-capability`. The - ``V4L2_TUNER_CAP_LOW`` or ``V4L2_TUNER_CAP_1HZ`` capability must - be the same for all frequency bands of the selected - tuner/modulator. So either all bands have that capability set, or - none of them have that capability. - * - __u32 - - ``rangelow`` - - :cspan:`2` The lowest tunable frequency in units of 62.5 kHz, or - if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units - of 62.5 Hz, for this frequency band. A 1 Hz unit is used when the - ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is set. - * - __u32 - - ``rangehigh`` - - :cspan:`2` The highest tunable frequency in units of 62.5 kHz, - or if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in - units of 62.5 Hz, for this frequency band. A 1 Hz unit is used - when the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is set. - * - __u32 - - ``modulation`` - - :cspan:`2` The supported modulation systems of this frequency - band. See :ref:`band-modulation`. - - .. note:: - - Currently only one modulation system per frequency band - is supported. More work will need to be done if multiple - modulation systems are possible. Contact the linux-media - mailing list - (`https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__) - if you need such functionality. - * - __u32 - - ``reserved``\ [9] - - Reserved for future extensions. - - Applications and drivers must set the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _band-modulation: - -.. flat-table:: Band Modulation Systems - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_BAND_MODULATION_VSB`` - - 0x02 - - Vestigial Sideband modulation, used for analog TV. - * - ``V4L2_BAND_MODULATION_FM`` - - 0x04 - - Frequency Modulation, commonly used for analog radio. - * - ``V4L2_BAND_MODULATION_AM`` - - 0x08 - - Amplitude Modulation, commonly used for analog radio. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The ``tuner`` or ``index`` is out of bounds or the ``type`` field is - wrong. diff --git a/Documentation/media/uapi/v4l/vidioc-enumaudio.rst b/Documentation/media/uapi/v4l/vidioc-enumaudio.rst deleted file mode 100644 index ee0c336c8721..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enumaudio.rst +++ /dev/null @@ -1,62 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUMAUDIO: - -********************** -ioctl VIDIOC_ENUMAUDIO -********************** - -Name -==== - -VIDIOC_ENUMAUDIO - Enumerate audio inputs - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUMAUDIO, struct v4l2_audio *argp ) - :name: VIDIOC_ENUMAUDIO - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_audio`. - - -Description -=========== - -To query the attributes of an audio input applications initialize the -``index`` field and zero out the ``reserved`` array of a struct -:c:type:`v4l2_audio` and call the :ref:`VIDIOC_ENUMAUDIO` -ioctl with a pointer to this structure. Drivers fill the rest of the -structure or return an ``EINVAL`` error code when the index is out of -bounds. To enumerate all audio inputs applications shall begin at index -zero, incrementing by one until the driver returns ``EINVAL``. - -See :ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` for a description of struct -:c:type:`v4l2_audio`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The number of the audio input is out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-enumaudioout.rst b/Documentation/media/uapi/v4l/vidioc-enumaudioout.rst deleted file mode 100644 index 3a8882214d62..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enumaudioout.rst +++ /dev/null @@ -1,67 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUMAUDOUT: - -*********************** -ioctl VIDIOC_ENUMAUDOUT -*********************** - -Name -==== - -VIDIOC_ENUMAUDOUT - Enumerate audio outputs - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUMAUDOUT, struct v4l2_audioout *argp ) - :name: VIDIOC_ENUMAUDOUT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_audioout`. - - -Description -=========== - -To query the attributes of an audio output applications initialize the -``index`` field and zero out the ``reserved`` array of a struct -:c:type:`v4l2_audioout` and call the ``VIDIOC_G_AUDOUT`` -ioctl with a pointer to this structure. Drivers fill the rest of the -structure or return an ``EINVAL`` error code when the index is out of -bounds. To enumerate all audio outputs applications shall begin at index -zero, incrementing by one until the driver returns ``EINVAL``. - -.. note:: - - Connectors on a TV card to loop back the received audio signal - to a sound card are not audio outputs in this sense. - -See :ref:`VIDIOC_G_AUDIOout <VIDIOC_G_AUDOUT>` for a description of struct -:c:type:`v4l2_audioout`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The number of the audio output is out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-enuminput.rst b/Documentation/media/uapi/v4l/vidioc-enuminput.rst deleted file mode 100644 index a0e4c4413121..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enuminput.rst +++ /dev/null @@ -1,242 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUMINPUT: - -********************** -ioctl VIDIOC_ENUMINPUT -********************** - -Name -==== - -VIDIOC_ENUMINPUT - Enumerate video inputs - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUMINPUT, struct v4l2_input *argp ) - :name: VIDIOC_ENUMINPUT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_input`. - - -Description -=========== - -To query the attributes of a video input applications initialize the -``index`` field of struct :c:type:`v4l2_input` and call the -:ref:`VIDIOC_ENUMINPUT` with a pointer to this structure. Drivers -fill the rest of the structure or return an ``EINVAL`` error code when the -index is out of bounds. To enumerate all inputs applications shall begin -at index zero, incrementing by one until the driver returns ``EINVAL``. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_input - -.. flat-table:: struct v4l2_input - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Identifies the input, set by the application. - * - __u8 - - ``name``\ [32] - - Name of the video input, a NUL-terminated ASCII string, for - example: "Vin (Composite 2)". This information is intended for the - user, preferably the connector label on the device itself. - * - __u32 - - ``type`` - - Type of the input, see :ref:`input-type`. - * - __u32 - - ``audioset`` - - Drivers can enumerate up to 32 video and audio inputs. This field - shows which audio inputs were selectable as audio source if this - was the currently selected video input. It is a bit mask. The LSB - corresponds to audio input 0, the MSB to input 31. Any number of - bits can be set, or none. - - When the driver does not enumerate audio inputs no bits must be - set. Applications shall not interpret this as lack of audio - support. Some drivers automatically select audio sources and do - not enumerate them since there is no choice anyway. - - For details on audio inputs and how to select the current input - see :ref:`audio`. - * - __u32 - - ``tuner`` - - Capture devices can have zero or more tuners (RF demodulators). - When the ``type`` is set to ``V4L2_INPUT_TYPE_TUNER`` this is an - RF connector and this field identifies the tuner. It corresponds - to struct :c:type:`v4l2_tuner` field ``index``. For - details on tuners see :ref:`tuner`. - * - :ref:`v4l2_std_id <v4l2-std-id>` - - ``std`` - - Every video input supports one or more different video standards. - This field is a set of all supported standards. For details on - video standards and how to switch see :ref:`standard`. - * - __u32 - - ``status`` - - This field provides status information about the input. See - :ref:`input-status` for flags. With the exception of the sensor - orientation bits ``status`` is only valid when this is the current - input. - * - __u32 - - ``capabilities`` - - This field provides capabilities for the input. See - :ref:`input-capabilities` for flags. - * - __u32 - - ``reserved``\ [3] - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _input-type: - -.. flat-table:: Input Types - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_INPUT_TYPE_TUNER`` - - 1 - - This input uses a tuner (RF demodulator). - * - ``V4L2_INPUT_TYPE_CAMERA`` - - 2 - - Any non-tuner video input, for example Composite Video, - S-Video, HDMI, camera sensor. The naming as ``_TYPE_CAMERA`` is historical, - today we would have called it ``_TYPE_VIDEO``. - * - ``V4L2_INPUT_TYPE_TOUCH`` - - 3 - - This input is a touch device for capturing raw touch data. - - - -.. tabularcolumns:: |p{4.8cm}|p{2.6cm}|p{10.1cm}| - -.. _input-status: - -.. flat-table:: Input Status Flags - :header-rows: 0 - :stub-columns: 0 - - * - :cspan:`2` General - * - ``V4L2_IN_ST_NO_POWER`` - - 0x00000001 - - Attached device is off. - * - ``V4L2_IN_ST_NO_SIGNAL`` - - 0x00000002 - - - * - ``V4L2_IN_ST_NO_COLOR`` - - 0x00000004 - - The hardware supports color decoding, but does not detect color - modulation in the signal. - * - :cspan:`2` Sensor Orientation - * - ``V4L2_IN_ST_HFLIP`` - - 0x00000010 - - The input is connected to a device that produces a signal that is - flipped horizontally and does not correct this before passing the - signal to userspace. - * - ``V4L2_IN_ST_VFLIP`` - - 0x00000020 - - The input is connected to a device that produces a signal that is - flipped vertically and does not correct this before passing the - signal to userspace. - .. note:: A 180 degree rotation is the same as HFLIP | VFLIP - * - :cspan:`2` Analog Video - * - ``V4L2_IN_ST_NO_H_LOCK`` - - 0x00000100 - - No horizontal sync lock. - * - ``V4L2_IN_ST_COLOR_KILL`` - - 0x00000200 - - A color killer circuit automatically disables color decoding when - it detects no color modulation. When this flag is set the color - killer is enabled *and* has shut off color decoding. - * - ``V4L2_IN_ST_NO_V_LOCK`` - - 0x00000400 - - No vertical sync lock. - * - ``V4L2_IN_ST_NO_STD_LOCK`` - - 0x00000800 - - No standard format lock in case of auto-detection format - by the component. - * - :cspan:`2` Digital Video - * - ``V4L2_IN_ST_NO_SYNC`` - - 0x00010000 - - No synchronization lock. - * - ``V4L2_IN_ST_NO_EQU`` - - 0x00020000 - - No equalizer lock. - * - ``V4L2_IN_ST_NO_CARRIER`` - - 0x00040000 - - Carrier recovery failed. - * - :cspan:`2` VCR and Set-Top Box - * - ``V4L2_IN_ST_MACROVISION`` - - 0x01000000 - - Macrovision is an analog copy prevention system mangling the video - signal to confuse video recorders. When this flag is set - Macrovision has been detected. - * - ``V4L2_IN_ST_NO_ACCESS`` - - 0x02000000 - - Conditional access denied. - * - ``V4L2_IN_ST_VTR`` - - 0x04000000 - - VTR time constant. [?] - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _input-capabilities: - -.. flat-table:: Input capabilities - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_IN_CAP_DV_TIMINGS`` - - 0x00000002 - - This input supports setting video timings by using - ``VIDIOC_S_DV_TIMINGS``. - * - ``V4L2_IN_CAP_STD`` - - 0x00000004 - - This input supports setting the TV standard by using - ``VIDIOC_S_STD``. - * - ``V4L2_IN_CAP_NATIVE_SIZE`` - - 0x00000008 - - This input supports setting the native size using the - ``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see - :ref:`v4l2-selections-common`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_input` ``index`` is out of - bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-enumoutput.rst b/Documentation/media/uapi/v4l/vidioc-enumoutput.rst deleted file mode 100644 index 0fea81f60541..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enumoutput.rst +++ /dev/null @@ -1,165 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUMOUTPUT: - -*********************** -ioctl VIDIOC_ENUMOUTPUT -*********************** - -Name -==== - -VIDIOC_ENUMOUTPUT - Enumerate video outputs - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUMOUTPUT, struct v4l2_output *argp ) - :name: VIDIOC_ENUMOUTPUT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_output`. - - -Description -=========== - -To query the attributes of a video outputs applications initialize the -``index`` field of struct :c:type:`v4l2_output` and call -the :ref:`VIDIOC_ENUMOUTPUT` with a pointer to this structure. -Drivers fill the rest of the structure or return an ``EINVAL`` error code -when the index is out of bounds. To enumerate all outputs applications -shall begin at index zero, incrementing by one until the driver returns -``EINVAL``. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_output - -.. flat-table:: struct v4l2_output - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Identifies the output, set by the application. - * - __u8 - - ``name``\ [32] - - Name of the video output, a NUL-terminated ASCII string, for - example: "Vout". This information is intended for the user, - preferably the connector label on the device itself. - * - __u32 - - ``type`` - - Type of the output, see :ref:`output-type`. - * - __u32 - - ``audioset`` - - Drivers can enumerate up to 32 video and audio outputs. This field - shows which audio outputs were selectable as the current output if - this was the currently selected video output. It is a bit mask. - The LSB corresponds to audio output 0, the MSB to output 31. Any - number of bits can be set, or none. - - When the driver does not enumerate audio outputs no bits must be - set. Applications shall not interpret this as lack of audio - support. Drivers may automatically select audio outputs without - enumerating them. - - For details on audio outputs and how to select the current output - see :ref:`audio`. - * - __u32 - - ``modulator`` - - Output devices can have zero or more RF modulators. When the - ``type`` is ``V4L2_OUTPUT_TYPE_MODULATOR`` this is an RF connector - and this field identifies the modulator. It corresponds to struct - :c:type:`v4l2_modulator` field ``index``. For - details on modulators see :ref:`tuner`. - * - :ref:`v4l2_std_id <v4l2-std-id>` - - ``std`` - - Every video output supports one or more different video standards. - This field is a set of all supported standards. For details on - video standards and how to switch see :ref:`standard`. - * - __u32 - - ``capabilities`` - - This field provides capabilities for the output. See - :ref:`output-capabilities` for flags. - * - __u32 - - ``reserved``\ [3] - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. tabularcolumns:: |p{7.0cm}|p{1.8cm}|p{8.7cm}| - -.. _output-type: - -.. flat-table:: Output Type - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_OUTPUT_TYPE_MODULATOR`` - - 1 - - This output is an analog TV modulator. - * - ``V4L2_OUTPUT_TYPE_ANALOG`` - - 2 - - Any non-modulator video output, for example Composite Video, - S-Video, HDMI. The naming as ``_TYPE_ANALOG`` is historical, - today we would have called it ``_TYPE_VIDEO``. - * - ``V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY`` - - 3 - - The video output will be copied to a :ref:`video overlay <overlay>`. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _output-capabilities: - -.. flat-table:: Output capabilities - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_OUT_CAP_DV_TIMINGS`` - - 0x00000002 - - This output supports setting video timings by using - ``VIDIOC_S_DV_TIMINGS``. - * - ``V4L2_OUT_CAP_STD`` - - 0x00000004 - - This output supports setting the TV standard by using - ``VIDIOC_S_STD``. - * - ``V4L2_OUT_CAP_NATIVE_SIZE`` - - 0x00000008 - - This output supports setting the native size using the - ``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see - :ref:`v4l2-selections-common`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_output` ``index`` is out of - bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-enumstd.rst b/Documentation/media/uapi/v4l/vidioc-enumstd.rst deleted file mode 100644 index 1603b1b3b6e8..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-enumstd.rst +++ /dev/null @@ -1,367 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_ENUMSTD: - -******************************************* -ioctl VIDIOC_ENUMSTD, VIDIOC_SUBDEV_ENUMSTD -******************************************* - -Name -==== - -VIDIOC_ENUMSTD - VIDIOC_SUBDEV_ENUMSTD - Enumerate supported video standards - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_ENUMSTD, struct v4l2_standard *argp ) - :name: VIDIOC_ENUMSTD - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_ENUMSTD, struct v4l2_standard *argp ) - :name: VIDIOC_SUBDEV_ENUMSTD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_standard`. - - -Description -=========== - -To query the attributes of a video standard, especially a custom (driver -defined) one, applications initialize the ``index`` field of struct -:c:type:`v4l2_standard` and call the :ref:`VIDIOC_ENUMSTD` -ioctl with a pointer to this structure. Drivers fill the rest of the -structure or return an ``EINVAL`` error code when the index is out of -bounds. To enumerate all standards applications shall begin at index -zero, incrementing by one until the driver returns ``EINVAL``. Drivers may -enumerate a different set of standards after switching the video input -or output. [#f1]_ - - -.. c:type:: v4l2_standard - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_standard - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Number of the video standard, set by the application. - * - :ref:`v4l2_std_id <v4l2-std-id>` - - ``id`` - - The bits in this field identify the standard as one of the common - standards listed in :ref:`v4l2-std-id`, or if bits 32 to 63 are - set as custom standards. Multiple bits can be set if the hardware - does not distinguish between these standards, however separate - indices do not indicate the opposite. The ``id`` must be unique. - No other enumerated struct :c:type:`v4l2_standard` structure, - for this input or output anyway, can contain the same set of bits. - * - __u8 - - ``name``\ [24] - - Name of the standard, a NUL-terminated ASCII string, for example: - "PAL-B/G", "NTSC Japan". This information is intended for the - user. - * - struct :c:type:`v4l2_fract` - - ``frameperiod`` - - The frame period (not field period) is numerator / denominator. - For example M/NTSC has a frame period of 1001 / 30000 seconds. - * - __u32 - - ``framelines`` - - Total lines per frame including blanking, e. g. 625 for B/PAL. - * - __u32 - - ``reserved``\ [4] - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. c:type:: v4l2_fract - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_fract - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``numerator`` - - - * - __u32 - - ``denominator`` - - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. _v4l2-std-id: - -.. flat-table:: typedef v4l2_std_id - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u64 - - ``v4l2_std_id`` - - This type is a set, each bit representing another video standard - as listed below and in :ref:`video-standards`. The 32 most - significant bits are reserved for custom (driver defined) video - standards. - - - -.. code-block:: c - - #define V4L2_STD_PAL_B ((v4l2_std_id)0x00000001) - #define V4L2_STD_PAL_B1 ((v4l2_std_id)0x00000002) - #define V4L2_STD_PAL_G ((v4l2_std_id)0x00000004) - #define V4L2_STD_PAL_H ((v4l2_std_id)0x00000008) - #define V4L2_STD_PAL_I ((v4l2_std_id)0x00000010) - #define V4L2_STD_PAL_D ((v4l2_std_id)0x00000020) - #define V4L2_STD_PAL_D1 ((v4l2_std_id)0x00000040) - #define V4L2_STD_PAL_K ((v4l2_std_id)0x00000080) - - #define V4L2_STD_PAL_M ((v4l2_std_id)0x00000100) - #define V4L2_STD_PAL_N ((v4l2_std_id)0x00000200) - #define V4L2_STD_PAL_Nc ((v4l2_std_id)0x00000400) - #define V4L2_STD_PAL_60 ((v4l2_std_id)0x00000800) - -``V4L2_STD_PAL_60`` is a hybrid standard with 525 lines, 60 Hz refresh -rate, and PAL color modulation with a 4.43 MHz color subcarrier. Some -PAL video recorders can play back NTSC tapes in this mode for display on -a 50/60 Hz agnostic PAL TV. - - -.. code-block:: c - - #define V4L2_STD_NTSC_M ((v4l2_std_id)0x00001000) - #define V4L2_STD_NTSC_M_JP ((v4l2_std_id)0x00002000) - #define V4L2_STD_NTSC_443 ((v4l2_std_id)0x00004000) - -``V4L2_STD_NTSC_443`` is a hybrid standard with 525 lines, 60 Hz refresh -rate, and NTSC color modulation with a 4.43 MHz color subcarrier. - - -.. code-block:: c - - #define V4L2_STD_NTSC_M_KR ((v4l2_std_id)0x00008000) - - #define V4L2_STD_SECAM_B ((v4l2_std_id)0x00010000) - #define V4L2_STD_SECAM_D ((v4l2_std_id)0x00020000) - #define V4L2_STD_SECAM_G ((v4l2_std_id)0x00040000) - #define V4L2_STD_SECAM_H ((v4l2_std_id)0x00080000) - #define V4L2_STD_SECAM_K ((v4l2_std_id)0x00100000) - #define V4L2_STD_SECAM_K1 ((v4l2_std_id)0x00200000) - #define V4L2_STD_SECAM_L ((v4l2_std_id)0x00400000) - #define V4L2_STD_SECAM_LC ((v4l2_std_id)0x00800000) - - /* ATSC/HDTV */ - #define V4L2_STD_ATSC_8_VSB ((v4l2_std_id)0x01000000) - #define V4L2_STD_ATSC_16_VSB ((v4l2_std_id)0x02000000) - -``V4L2_STD_ATSC_8_VSB`` and ``V4L2_STD_ATSC_16_VSB`` are U.S. -terrestrial digital TV standards. Presently the V4L2 API does not -support digital TV. See also the Linux DVB API at -`https://linuxtv.org <https://linuxtv.org>`__. - - -.. code-block:: c - - #define V4L2_STD_PAL_BG (V4L2_STD_PAL_B | - V4L2_STD_PAL_B1 | - V4L2_STD_PAL_G) - #define V4L2_STD_B (V4L2_STD_PAL_B | - V4L2_STD_PAL_B1 | - V4L2_STD_SECAM_B) - #define V4L2_STD_GH (V4L2_STD_PAL_G | - V4L2_STD_PAL_H | - V4L2_STD_SECAM_G | - V4L2_STD_SECAM_H) - #define V4L2_STD_PAL_DK (V4L2_STD_PAL_D | - V4L2_STD_PAL_D1 | - V4L2_STD_PAL_K) - #define V4L2_STD_PAL (V4L2_STD_PAL_BG | - V4L2_STD_PAL_DK | - V4L2_STD_PAL_H | - V4L2_STD_PAL_I) - #define V4L2_STD_NTSC (V4L2_STD_NTSC_M | - V4L2_STD_NTSC_M_JP | - V4L2_STD_NTSC_M_KR) - #define V4L2_STD_MN (V4L2_STD_PAL_M | - V4L2_STD_PAL_N | - V4L2_STD_PAL_Nc | - V4L2_STD_NTSC) - #define V4L2_STD_SECAM_DK (V4L2_STD_SECAM_D | - V4L2_STD_SECAM_K | - V4L2_STD_SECAM_K1) - #define V4L2_STD_DK (V4L2_STD_PAL_DK | - V4L2_STD_SECAM_DK) - - #define V4L2_STD_SECAM (V4L2_STD_SECAM_B | - V4L2_STD_SECAM_G | - V4L2_STD_SECAM_H | - V4L2_STD_SECAM_DK | - V4L2_STD_SECAM_L | - V4L2_STD_SECAM_LC) - - #define V4L2_STD_525_60 (V4L2_STD_PAL_M | - V4L2_STD_PAL_60 | - V4L2_STD_NTSC | - V4L2_STD_NTSC_443) - #define V4L2_STD_625_50 (V4L2_STD_PAL | - V4L2_STD_PAL_N | - V4L2_STD_PAL_Nc | - V4L2_STD_SECAM) - - #define V4L2_STD_UNKNOWN 0 - #define V4L2_STD_ALL (V4L2_STD_525_60 | - V4L2_STD_625_50) - - -.. raw:: latex - - \begingroup - \tiny - \setlength{\tabcolsep}{2pt} - -.. NTSC/M PAL/M /N /B /D /H /I SECAM/B /D /K1 /L -.. tabularcolumns:: |p{1.43cm}|p{1.38cm}|p{1.59cm}|p{1.7cm}|p{1.7cm}|p{1.17cm}|p{0.64cm}|p{1.71cm}|p{1.6cm}|p{1.07cm}|p{1.07cm}|p{1.07cm}| - -.. _video-standards: - -.. flat-table:: Video Standards (based on :ref:`itu470`) - :header-rows: 1 - :stub-columns: 0 - - * - Characteristics - - M/NTSC [#f2]_ - - M/PAL - - N/PAL [#f3]_ - - B, B1, G/PAL - - D, D1, K/PAL - - H/PAL - - I/PAL - - B, G/SECAM - - D, K/SECAM - - K1/SECAM - - L/SECAM - * - Frame lines - - :cspan:`1` 525 - - :cspan:`8` 625 - * - Frame period (s) - - :cspan:`1` 1001/30000 - - :cspan:`8` 1/25 - * - Chrominance sub-carrier frequency (Hz) - - 3579545 ± 10 - - 3579611.49 ± 10 - - 4433618.75 ± 5 - - (3582056.25 ± 5) - - :cspan:`3` 4433618.75 ± 5 - - 4433618.75 ± 1 - - :cspan:`2` f\ :sub:`OR` = 4406250 ± 2000, - - f\ :sub:`OB` = 4250000 ± 2000 - * - Nominal radio-frequency channel bandwidth (MHz) - - 6 - - 6 - - 6 - - B: 7; B1, G: 8 - - 8 - - 8 - - 8 - - 8 - - 8 - - 8 - - 8 - * - Sound carrier relative to vision carrier (MHz) - - 4.5 - - 4.5 - - 4.5 - - 5.5 ± 0.001 [#f4]_ [#f5]_ [#f6]_ [#f7]_ - - 6.5 ± 0.001 - - 5.5 - - 5.9996 ± 0.0005 - - 5.5 ± 0.001 - - 6.5 ± 0.001 - - 6.5 - - 6.5 [#f8]_ - -.. raw:: latex - - \endgroup - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_standard` ``index`` is out - of bounds. - -ENODATA - Standard video timings are not supported for this input or output. - -.. [#f1] - The supported standards may overlap and we need an unambiguous set to - find the current standard returned by :ref:`VIDIOC_G_STD <VIDIOC_G_STD>`. - -.. [#f2] - Japan uses a standard similar to M/NTSC (V4L2_STD_NTSC_M_JP). - -.. [#f3] - The values in brackets apply to the combination N/PAL a.k.a. - N\ :sub:`C` used in Argentina (V4L2_STD_PAL_Nc). - -.. [#f4] - In the Federal Republic of Germany, Austria, Italy, the Netherlands, - Slovakia and Switzerland a system of two sound carriers is used, the - frequency of the second carrier being 242.1875 kHz above the - frequency of the first sound carrier. For stereophonic sound - transmissions a similar system is used in Australia. - -.. [#f5] - New Zealand uses a sound carrier displaced 5.4996 ± 0.0005 MHz from - the vision carrier. - -.. [#f6] - In Denmark, Finland, New Zealand, Sweden and Spain a system of two - sound carriers is used. In Iceland, Norway and Poland the same system - is being introduced. The second carrier is 5.85 MHz above the vision - carrier and is DQPSK modulated with 728 kbit/s sound and data - multiplex. (NICAM system) - -.. [#f7] - In the United Kingdom, a system of two sound carriers is used. The - second sound carrier is 6.552 MHz above the vision carrier and is - DQPSK modulated with a 728 kbit/s sound and data multiplex able to - carry two sound channels. (NICAM system) - -.. [#f8] - In France, a digital carrier 5.85 MHz away from the vision carrier - may be used in addition to the main sound carrier. It is modulated in - differentially encoded QPSK with a 728 kbit/s sound and data - multiplexer capable of carrying two sound channels. (NICAM system) diff --git a/Documentation/media/uapi/v4l/vidioc-expbuf.rst b/Documentation/media/uapi/v4l/vidioc-expbuf.rst deleted file mode 100644 index 4bd8cd79754c..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-expbuf.rst +++ /dev/null @@ -1,175 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_EXPBUF: - -******************* -ioctl VIDIOC_EXPBUF -******************* - -Name -==== - -VIDIOC_EXPBUF - Export a buffer as a DMABUF file descriptor. - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_EXPBUF, struct v4l2_exportbuffer *argp ) - :name: VIDIOC_EXPBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_exportbuffer`. - - -Description -=========== - -This ioctl is an extension to the :ref:`memory mapping <mmap>` I/O -method, therefore it is available only for ``V4L2_MEMORY_MMAP`` buffers. -It can be used to export a buffer as a DMABUF file at any time after -buffers have been allocated with the -:ref:`VIDIOC_REQBUFS` ioctl. - -To export a buffer, applications fill struct -:c:type:`v4l2_exportbuffer`. The ``type`` field is -set to the same buffer type as was previously used with struct -:c:type:`v4l2_requestbuffers` ``type``. -Applications must also set the ``index`` field. Valid index numbers -range from zero to the number of buffers allocated with -:ref:`VIDIOC_REQBUFS` (struct -:c:type:`v4l2_requestbuffers` ``count``) minus -one. For the multi-planar API, applications set the ``plane`` field to -the index of the plane to be exported. Valid planes range from zero to -the maximal number of valid planes for the currently active format. For -the single-planar API, applications must set ``plane`` to zero. -Additional flags may be posted in the ``flags`` field. Refer to a manual -for open() for details. Currently only O_CLOEXEC, O_RDONLY, O_WRONLY, -and O_RDWR are supported. All other fields must be set to zero. In the -case of multi-planar API, every plane is exported separately using -multiple :ref:`VIDIOC_EXPBUF` calls. - -After calling :ref:`VIDIOC_EXPBUF` the ``fd`` field will be set by a -driver. This is a DMABUF file descriptor. The application may pass it to -other DMABUF-aware devices. Refer to :ref:`DMABUF importing <dmabuf>` -for details about importing DMABUF files into V4L2 nodes. It is -recommended to close a DMABUF file when it is no longer used to allow -the associated memory to be reclaimed. - - -Examples -======== - - -.. code-block:: c - - int buffer_export(int v4lfd, enum v4l2_buf_type bt, int index, int *dmafd) - { - struct v4l2_exportbuffer expbuf; - - memset(&expbuf, 0, sizeof(expbuf)); - expbuf.type = bt; - expbuf.index = index; - if (ioctl(v4lfd, VIDIOC_EXPBUF, &expbuf) == -1) { - perror("VIDIOC_EXPBUF"); - return -1; - } - - *dmafd = expbuf.fd; - - return 0; - } - - -.. code-block:: c - - int buffer_export_mp(int v4lfd, enum v4l2_buf_type bt, int index, - int dmafd[], int n_planes) - { - int i; - - for (i = 0; i < n_planes; ++i) { - struct v4l2_exportbuffer expbuf; - - memset(&expbuf, 0, sizeof(expbuf)); - expbuf.type = bt; - expbuf.index = index; - expbuf.plane = i; - if (ioctl(v4lfd, VIDIOC_EXPBUF, &expbuf) == -1) { - perror("VIDIOC_EXPBUF"); - while (i) - close(dmafd[--i]); - return -1; - } - dmafd[i] = expbuf.fd; - } - - return 0; - } - - -.. c:type:: v4l2_exportbuffer - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_exportbuffer - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of the buffer, same as struct - :c:type:`v4l2_format` ``type`` or struct - :c:type:`v4l2_requestbuffers` ``type``, set - by the application. See :c:type:`v4l2_buf_type` - * - __u32 - - ``index`` - - Number of the buffer, set by the application. This field is only - used for :ref:`memory mapping <mmap>` I/O and can range from - zero to the number of buffers allocated with the - :ref:`VIDIOC_REQBUFS` and/or - :ref:`VIDIOC_CREATE_BUFS` ioctls. - * - __u32 - - ``plane`` - - Index of the plane to be exported when using the multi-planar API. - Otherwise this value must be set to zero. - * - __u32 - - ``flags`` - - Flags for the newly created file, currently only ``O_CLOEXEC``, - ``O_RDONLY``, ``O_WRONLY``, and ``O_RDWR`` are supported, refer to - the manual of open() for more details. - * - __s32 - - ``fd`` - - The DMABUF file descriptor associated with a buffer. Set by the - driver. - * - __u32 - - ``reserved[11]`` - - Reserved field for future use. Drivers and applications must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - A queue is not in MMAP mode or DMABUF exporting is not supported or - ``flags`` or ``type`` or ``index`` or ``plane`` fields are invalid. diff --git a/Documentation/media/uapi/v4l/vidioc-g-audio.rst b/Documentation/media/uapi/v4l/vidioc-g-audio.rst deleted file mode 100644 index 7af4fe478ba4..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-audio.rst +++ /dev/null @@ -1,135 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_AUDIO: - -************************************ -ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO -************************************ - -Name -==== - -VIDIOC_G_AUDIO - VIDIOC_S_AUDIO - Query or select the current audio input and its attributes - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_AUDIO, struct v4l2_audio *argp ) - :name: VIDIOC_G_AUDIO - -.. c:function:: int ioctl( int fd, VIDIOC_S_AUDIO, const struct v4l2_audio *argp ) - :name: VIDIOC_S_AUDIO - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_audio`. - - -Description -=========== - -To query the current audio input applications zero out the ``reserved`` -array of a struct :c:type:`v4l2_audio` and call the -:ref:`VIDIOC_G_AUDIO <VIDIOC_G_AUDIO>` ioctl with a pointer to this structure. Drivers fill -the rest of the structure or return an ``EINVAL`` error code when the device -has no audio inputs, or none which combine with the current video input. - -Audio inputs have one writable property, the audio mode. To select the -current audio input *and* change the audio mode, applications initialize -the ``index`` and ``mode`` fields, and the ``reserved`` array of a -struct :c:type:`v4l2_audio` structure and call the :ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` -ioctl. Drivers may switch to a different audio mode if the request -cannot be satisfied. However, this is a write-only ioctl, it does not -return the actual new audio mode. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_audio - -.. flat-table:: struct v4l2_audio - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Identifies the audio input, set by the driver or application. - * - __u8 - - ``name``\ [32] - - Name of the audio input, a NUL-terminated ASCII string, for - example: "Line In". This information is intended for the user, - preferably the connector label on the device itself. - * - __u32 - - ``capability`` - - Audio capability flags, see :ref:`audio-capability`. - * - __u32 - - ``mode`` - - Audio mode flags set by drivers and applications (on - :ref:`VIDIOC_S_AUDIO <VIDIOC_G_AUDIO>` ioctl), see :ref:`audio-mode`. - * - __u32 - - ``reserved``\ [2] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _audio-capability: - -.. flat-table:: Audio Capability Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_AUDCAP_STEREO`` - - 0x00001 - - This is a stereo input. The flag is intended to automatically - disable stereo recording etc. when the signal is always monaural. - The API provides no means to detect if stereo is *received*, - unless the audio input belongs to a tuner. - * - ``V4L2_AUDCAP_AVL`` - - 0x00002 - - Automatic Volume Level mode is supported. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _audio-mode: - -.. flat-table:: Audio Mode Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_AUDMODE_AVL`` - - 0x00001 - - AVL mode is on. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - No audio inputs combine with the current video input, or the number - of the selected audio input is out of bounds or it does not combine. diff --git a/Documentation/media/uapi/v4l/vidioc-g-audioout.rst b/Documentation/media/uapi/v4l/vidioc-g-audioout.rst deleted file mode 100644 index c6ea0396a96a..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-audioout.rst +++ /dev/null @@ -1,108 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_AUDOUT: - -************************************** -ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT -************************************** - -Name -==== - -VIDIOC_G_AUDOUT - VIDIOC_S_AUDOUT - Query or select the current audio output - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_AUDOUT, struct v4l2_audioout *argp ) - :name: VIDIOC_G_AUDOUT - -.. c:function:: int ioctl( int fd, VIDIOC_S_AUDOUT, const struct v4l2_audioout *argp ) - :name: VIDIOC_S_AUDOUT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_audioout`. - - -Description -=========== - -To query the current audio output applications zero out the ``reserved`` -array of a struct :c:type:`v4l2_audioout` and call the -``VIDIOC_G_AUDOUT`` ioctl with a pointer to this structure. Drivers fill -the rest of the structure or return an ``EINVAL`` error code when the device -has no audio inputs, or none which combine with the current video -output. - -Audio outputs have no writable properties. Nevertheless, to select the -current audio output applications can initialize the ``index`` field and -``reserved`` array (which in the future may contain writable properties) -of a struct :c:type:`v4l2_audioout` structure and call the -``VIDIOC_S_AUDOUT`` ioctl. Drivers switch to the requested output or -return the ``EINVAL`` error code when the index is out of bounds. This is a -write-only ioctl, it does not return the current audio output attributes -as ``VIDIOC_G_AUDOUT`` does. - -.. note:: - - Connectors on a TV card to loop back the received audio signal - to a sound card are not audio outputs in this sense. - - -.. c:type:: v4l2_audioout - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_audioout - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Identifies the audio output, set by the driver or application. - * - __u8 - - ``name``\ [32] - - Name of the audio output, a NUL-terminated ASCII string, for - example: "Line Out". This information is intended for the user, - preferably the connector label on the device itself. - * - __u32 - - ``capability`` - - Audio capability flags, none defined yet. Drivers must set this - field to zero. - * - __u32 - - ``mode`` - - Audio mode, none defined yet. Drivers and applications (on - ``VIDIOC_S_AUDOUT``) must set this field to zero. - * - __u32 - - ``reserved``\ [2] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - No audio outputs combine with the current video output, or the - number of the selected audio output is out of bounds or it does not - combine. diff --git a/Documentation/media/uapi/v4l/vidioc-g-crop.rst b/Documentation/media/uapi/v4l/vidioc-g-crop.rst deleted file mode 100644 index 1eff59dc5f35..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-crop.rst +++ /dev/null @@ -1,119 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_CROP: - -********************************** -ioctl VIDIOC_G_CROP, VIDIOC_S_CROP -********************************** - -Name -==== - -VIDIOC_G_CROP - VIDIOC_S_CROP - Get or set the current cropping rectangle - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_CROP, struct v4l2_crop *argp ) - :name: VIDIOC_G_CROP - -.. c:function:: int ioctl( int fd, VIDIOC_S_CROP, const struct v4l2_crop *argp ) - :name: VIDIOC_S_CROP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_crop`. - - -Description -=========== - -To query the cropping rectangle size and position applications set the -``type`` field of a struct :c:type:`v4l2_crop` structure to the -respective buffer (stream) type and call the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` ioctl -with a pointer to this structure. The driver fills the rest of the -structure or returns the ``EINVAL`` error code if cropping is not supported. - -To change the cropping rectangle applications initialize the ``type`` -and struct :c:type:`v4l2_rect` substructure named ``c`` of a -v4l2_crop structure and call the :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` ioctl with a pointer -to this structure. - -The driver first adjusts the requested dimensions against hardware -limits, i. e. the bounds given by the capture/output window, and it -rounds to the closest possible values of horizontal and vertical offset, -width and height. In particular the driver must round the vertical -offset of the cropping rectangle to frame lines modulo two, such that -the field order cannot be confused. - -Second the driver adjusts the image size (the opposite rectangle of the -scaling process, source or target depending on the data direction) to -the closest size possible while maintaining the current horizontal and -vertical scaling factor. - -Finally the driver programs the hardware with the actual cropping and -image parameters. :ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` is a write-only ioctl, it does not -return the actual parameters. To query them applications must call -:ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and :ref:`VIDIOC_G_FMT`. When the -parameters are unsuitable the application may modify the cropping or -image parameters and repeat the cycle until satisfactory parameters have -been negotiated. - -When cropping is not supported then no parameters are changed and -:ref:`VIDIOC_S_CROP <VIDIOC_G_CROP>` returns the ``EINVAL`` error code. - - -.. c:type:: v4l2_crop - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_crop - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of the data stream, set by the application. Only these types - are valid here: ``V4L2_BUF_TYPE_VIDEO_CAPTURE``, ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``, - ``V4L2_BUF_TYPE_VIDEO_OUTPUT``, ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE`` and - ``V4L2_BUF_TYPE_VIDEO_OVERLAY``. See :c:type:`v4l2_buf_type` and the note below. - * - struct :c:type:`v4l2_rect` - - ``c`` - - Cropping rectangle. The same co-ordinate system as for struct - :c:type:`v4l2_cropcap` ``bounds`` is used. - -.. note:: - Unfortunately in the case of multiplanar buffer types - (``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``) - this API was messed up with regards to how the :c:type:`v4l2_crop` ``type`` field - should be filled in. Some drivers only accepted the ``_MPLANE`` buffer type while - other drivers only accepted a non-multiplanar buffer type (i.e. without the - ``_MPLANE`` at the end). - - Starting with kernel 4.13 both variations are allowed. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -ENODATA - Cropping is not supported for this input or output. diff --git a/Documentation/media/uapi/v4l/vidioc-g-ctrl.rst b/Documentation/media/uapi/v4l/vidioc-g-ctrl.rst deleted file mode 100644 index 8493b52adbb2..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-ctrl.rst +++ /dev/null @@ -1,106 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_CTRL: - -********************************** -ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL -********************************** - -Name -==== - -VIDIOC_G_CTRL - VIDIOC_S_CTRL - Get or set the value of a control - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_CTRL, struct v4l2_control *argp ) - :name: VIDIOC_G_CTRL - -.. c:function:: int ioctl( int fd, VIDIOC_S_CTRL, struct v4l2_control *argp ) - :name: VIDIOC_S_CTRL - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_control`. - - -Description -=========== - -To get the current value of a control applications initialize the ``id`` -field of a struct :c:type:`v4l2_control` and call the -:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` ioctl with a pointer to this structure. To change the -value of a control applications initialize the ``id`` and ``value`` -fields of a struct :c:type:`v4l2_control` and call the -:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` ioctl. - -When the ``id`` is invalid drivers return an ``EINVAL`` error code. When the -``value`` is out of bounds drivers can choose to take the closest valid -value or return an ``ERANGE`` error code, whatever seems more appropriate. -However, :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` is a write-only ioctl, it does not return the -actual new value. If the ``value`` is inappropriate for the control -(e.g. if it refers to an unsupported menu index of a menu control), then -EINVAL error code is returned as well. - -These ioctls work only with user controls. For other control classes the -:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, -:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` or -:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` must be used. - - -.. c:type:: v4l2_control - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_control - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``id`` - - Identifies the control, set by the application. - * - __s32 - - ``value`` - - New value or current value. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_control` ``id`` is invalid - or the ``value`` is inappropriate for the given control (i.e. if a - menu item is selected that is not supported by the driver according - to :ref:`VIDIOC_QUERYMENU <VIDIOC_QUERYCTRL>`). - -ERANGE - The struct :c:type:`v4l2_control` ``value`` is out of - bounds. - -EBUSY - The control is temporarily not changeable, possibly because another - applications took over control of the device function this control - belongs to. - -EACCES - Attempt to set a read-only control or to get a write-only control. diff --git a/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst b/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst deleted file mode 100644 index e36dd2622857..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-dv-timings.rst +++ /dev/null @@ -1,312 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_DV_TIMINGS: - -********************************************** -ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS -********************************************** - -Name -==== - -VIDIOC_G_DV_TIMINGS - VIDIOC_S_DV_TIMINGS - VIDIOC_SUBDEV_G_DV_TIMINGS - VIDIOC_SUBDEV_S_DV_TIMINGS - Get or set DV timings for input or output - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_DV_TIMINGS, struct v4l2_dv_timings *argp ) - :name: VIDIOC_G_DV_TIMINGS - -.. c:function:: int ioctl( int fd, VIDIOC_S_DV_TIMINGS, struct v4l2_dv_timings *argp ) - :name: VIDIOC_S_DV_TIMINGS - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_DV_TIMINGS, struct v4l2_dv_timings *argp ) - :name: VIDIOC_SUBDEV_G_DV_TIMINGS - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_DV_TIMINGS, struct v4l2_dv_timings *argp ) - :name: VIDIOC_SUBDEV_S_DV_TIMINGS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_dv_timings`. - - -Description -=========== - -To set DV timings for the input or output, applications use the -:ref:`VIDIOC_S_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl and to get the current timings, -applications use the :ref:`VIDIOC_G_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` ioctl. The detailed timing -information is filled in using the structure struct -:c:type:`v4l2_dv_timings`. These ioctls take a -pointer to the struct :c:type:`v4l2_dv_timings` -structure as argument. If the ioctl is not supported or the timing -values are not correct, the driver returns ``EINVAL`` error code. - -The ``linux/v4l2-dv-timings.h`` header can be used to get the timings of -the formats in the :ref:`cea861` and :ref:`vesadmt` standards. If -the current input or output does not support DV timings (e.g. if -:ref:`VIDIOC_ENUMINPUT` does not set the -``V4L2_IN_CAP_DV_TIMINGS`` flag), then ``ENODATA`` error code is returned. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - This ioctl is not supported, or the :ref:`VIDIOC_S_DV_TIMINGS <VIDIOC_G_DV_TIMINGS>` - parameter was unsuitable. - -ENODATA - Digital video timings are not supported for this input or output. - -EBUSY - The device is busy and therefore can not change the timings. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_bt_timings - -.. flat-table:: struct v4l2_bt_timings - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``width`` - - Width of the active video in pixels. - * - __u32 - - ``height`` - - Height of the active video frame in lines. So for interlaced - formats the height of the active video in each field is - ``height``/2. - * - __u32 - - ``interlaced`` - - Progressive (``V4L2_DV_PROGRESSIVE``) or interlaced (``V4L2_DV_INTERLACED``). - * - __u32 - - ``polarities`` - - This is a bit mask that defines polarities of sync signals. bit 0 - (``V4L2_DV_VSYNC_POS_POL``) is for vertical sync polarity and bit - 1 (``V4L2_DV_HSYNC_POS_POL``) is for horizontal sync polarity. If - the bit is set (1) it is positive polarity and if is cleared (0), - it is negative polarity. - * - __u64 - - ``pixelclock`` - - Pixel clock in Hz. Ex. 74.25MHz->74250000 - * - __u32 - - ``hfrontporch`` - - Horizontal front porch in pixels - * - __u32 - - ``hsync`` - - Horizontal sync length in pixels - * - __u32 - - ``hbackporch`` - - Horizontal back porch in pixels - * - __u32 - - ``vfrontporch`` - - Vertical front porch in lines. For interlaced formats this refers - to the odd field (aka field 1). - * - __u32 - - ``vsync`` - - Vertical sync length in lines. For interlaced formats this refers - to the odd field (aka field 1). - * - __u32 - - ``vbackporch`` - - Vertical back porch in lines. For interlaced formats this refers - to the odd field (aka field 1). - * - __u32 - - ``il_vfrontporch`` - - Vertical front porch in lines for the even field (aka field 2) of - interlaced field formats. Must be 0 for progressive formats. - * - __u32 - - ``il_vsync`` - - Vertical sync length in lines for the even field (aka field 2) of - interlaced field formats. Must be 0 for progressive formats. - * - __u32 - - ``il_vbackporch`` - - Vertical back porch in lines for the even field (aka field 2) of - interlaced field formats. Must be 0 for progressive formats. - * - __u32 - - ``standards`` - - The video standard(s) this format belongs to. This will be filled - in by the driver. Applications must set this to 0. See - :ref:`dv-bt-standards` for a list of standards. - * - __u32 - - ``flags`` - - Several flags giving more information about the format. See - :ref:`dv-bt-flags` for a description of the flags. - * - struct :c:type:`v4l2_fract` - - ``picture_aspect`` - - The picture aspect if the pixels are not square. Only valid if the - ``V4L2_DV_FL_HAS_PICTURE_ASPECT`` flag is set. - * - __u8 - - ``cea861_vic`` - - The Video Identification Code according to the CEA-861 standard. - Only valid if the ``V4L2_DV_FL_HAS_CEA861_VIC`` flag is set. - * - __u8 - - ``hdmi_vic`` - - The Video Identification Code according to the HDMI standard. - Only valid if the ``V4L2_DV_FL_HAS_HDMI_VIC`` flag is set. - * - __u8 - - ``reserved[46]`` - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - -.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{7.0cm}|p{3.5cm}| - -.. c:type:: v4l2_dv_timings - -.. flat-table:: struct v4l2_dv_timings - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of DV timings as listed in :ref:`dv-timing-types`. - * - union { - - (anonymous) - * - struct :c:type:`v4l2_bt_timings` - - ``bt`` - - Timings defined by BT.656/1120 specifications - * - __u32 - - ``reserved``\ [32] - - - * - } - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. _dv-timing-types: - -.. flat-table:: DV Timing types - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - Timing type - - value - - Description - * - - - - - - * - ``V4L2_DV_BT_656_1120`` - - 0 - - BT.656/1120 timings - -.. tabularcolumns:: |p{4.5cm}|p{12.8cm}| - -.. _dv-bt-standards: - -.. flat-table:: DV BT Timing standards - :header-rows: 0 - :stub-columns: 0 - - * - Timing standard - - Description - * - ``V4L2_DV_BT_STD_CEA861`` - - The timings follow the CEA-861 Digital TV Profile standard - * - ``V4L2_DV_BT_STD_DMT`` - - The timings follow the VESA Discrete Monitor Timings standard - * - ``V4L2_DV_BT_STD_CVT`` - - The timings follow the VESA Coordinated Video Timings standard - * - ``V4L2_DV_BT_STD_GTF`` - - The timings follow the VESA Generalized Timings Formula standard - * - ``V4L2_DV_BT_STD_SDI`` - - The timings follow the SDI Timings standard. - There are no horizontal syncs/porches at all in this format. - Total blanking timings must be set in hsync or vsync fields only. - -.. tabularcolumns:: |p{7.0cm}|p{10.5cm}| - -.. _dv-bt-flags: - -.. flat-table:: DV BT Timing flags - :header-rows: 0 - :stub-columns: 0 - - * - Flag - - Description - * - ``V4L2_DV_FL_REDUCED_BLANKING`` - - CVT/GTF specific: the timings use reduced blanking (CVT) or the - 'Secondary GTF' curve (GTF). In both cases the horizontal and/or - vertical blanking intervals are reduced, allowing a higher - resolution over the same bandwidth. This is a read-only flag, - applications must not set this. - * - ``V4L2_DV_FL_CAN_REDUCE_FPS`` - - CEA-861 specific: set for CEA-861 formats with a framerate that is - a multiple of six. These formats can be optionally played at 1 / - 1.001 speed to be compatible with 60 Hz based standards such as - NTSC and PAL-M that use a framerate of 29.97 frames per second. If - the transmitter can't generate such frequencies, then the flag - will also be cleared. This is a read-only flag, applications must - not set this. - * - ``V4L2_DV_FL_REDUCED_FPS`` - - CEA-861 specific: only valid for video transmitters or video - receivers that have the ``V4L2_DV_FL_CAN_DETECT_REDUCED_FPS`` - set. This flag is cleared otherwise. It is also only valid for - formats with the ``V4L2_DV_FL_CAN_REDUCE_FPS`` flag set, for other - formats the flag will be cleared by the driver. - - If the application sets this flag for a transmitter, then the - pixelclock used to set up the transmitter is divided by 1.001 to - make it compatible with NTSC framerates. If the transmitter can't - generate such frequencies, then the flag will be cleared. - - If a video receiver detects that the format uses a reduced framerate, - then it will set this flag to signal this to the application. - * - ``V4L2_DV_FL_HALF_LINE`` - - Specific to interlaced formats: if set, then the vertical - frontporch of field 1 (aka the odd field) is really one half-line - longer and the vertical backporch of field 2 (aka the even field) - is really one half-line shorter, so each field has exactly the - same number of half-lines. Whether half-lines can be detected or - used depends on the hardware. - * - ``V4L2_DV_FL_IS_CE_VIDEO`` - - If set, then this is a Consumer Electronics (CE) video format. - Such formats differ from other formats (commonly called IT - formats) in that if R'G'B' encoding is used then by default the - R'G'B' values use limited range (i.e. 16-235) as opposed to full - range (i.e. 0-255). All formats defined in CEA-861 except for the - 640x480p59.94 format are CE formats. - * - ``V4L2_DV_FL_FIRST_FIELD_EXTRA_LINE`` - - Some formats like SMPTE-125M have an interlaced signal with a odd - total height. For these formats, if this flag is set, the first - field has the extra line. Else, it is the second field. - * - ``V4L2_DV_FL_HAS_PICTURE_ASPECT`` - - If set, then the picture_aspect field is valid. Otherwise assume that - the pixels are square, so the picture aspect ratio is the same as the - width to height ratio. - * - ``V4L2_DV_FL_HAS_CEA861_VIC`` - - If set, then the cea861_vic field is valid and contains the Video - Identification Code as per the CEA-861 standard. - * - ``V4L2_DV_FL_HAS_HDMI_VIC`` - - If set, then the hdmi_vic field is valid and contains the Video - Identification Code as per the HDMI standard (HDMI Vendor Specific - InfoFrame). - * - ``V4L2_DV_FL_CAN_DETECT_REDUCED_FPS`` - - CEA-861 specific: only valid for video receivers, the flag is - cleared by transmitters. - If set, then the hardware can detect the difference between - regular framerates and framerates reduced by 1000/1001. E.g.: - 60 vs 59.94 Hz, 30 vs 29.97 Hz or 24 vs 23.976 Hz. diff --git a/Documentation/media/uapi/v4l/vidioc-g-edid.rst b/Documentation/media/uapi/v4l/vidioc-g-edid.rst deleted file mode 100644 index e55b349a0c7e..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-edid.rst +++ /dev/null @@ -1,154 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_EDID: - -****************************************************************************** -ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID -****************************************************************************** - -Name -==== - -VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Get or set the EDID of a video receiver/transmitter - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_EDID, struct v4l2_edid *argp ) - :name: VIDIOC_G_EDID - -.. c:function:: int ioctl( int fd, VIDIOC_S_EDID, struct v4l2_edid *argp ) - :name: VIDIOC_S_EDID - - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_EDID, struct v4l2_edid *argp ) - :name: VIDIOC_SUBDEV_G_EDID - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_EDID, struct v4l2_edid *argp ) - :name: VIDIOC_SUBDEV_S_EDID - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_edid`. - - -Description -=========== - -These ioctls can be used to get or set an EDID associated with an input -from a receiver or an output of a transmitter device. They can be used -with subdevice nodes (/dev/v4l-subdevX) or with video nodes -(/dev/videoX). - -When used with video nodes the ``pad`` field represents the input (for -video capture devices) or output (for video output devices) index as is -returned by :ref:`VIDIOC_ENUMINPUT` and -:ref:`VIDIOC_ENUMOUTPUT` respectively. When used -with subdevice nodes the ``pad`` field represents the input or output -pad of the subdevice. If there is no EDID support for the given ``pad`` -value, then the ``EINVAL`` error code will be returned. - -To get the EDID data the application has to fill in the ``pad``, -``start_block``, ``blocks`` and ``edid`` fields, zero the ``reserved`` -array and call :ref:`VIDIOC_G_EDID <VIDIOC_G_EDID>`. The current EDID from block -``start_block`` and of size ``blocks`` will be placed in the memory -``edid`` points to. The ``edid`` pointer must point to memory at least -``blocks`` * 128 bytes large (the size of one block is 128 bytes). - -If there are fewer blocks than specified, then the driver will set -``blocks`` to the actual number of blocks. If there are no EDID blocks -available at all, then the error code ``ENODATA`` is set. - -If blocks have to be retrieved from the sink, then this call will block -until they have been read. - -If ``start_block`` and ``blocks`` are both set to 0 when -:ref:`VIDIOC_G_EDID <VIDIOC_G_EDID>` is called, then the driver will set ``blocks`` to the -total number of available EDID blocks and it will return 0 without -copying any data. This is an easy way to discover how many EDID blocks -there are. - -.. note:: - - If there are no EDID blocks available at all, then - the driver will set ``blocks`` to 0 and it returns 0. - -To set the EDID blocks of a receiver the application has to fill in the -``pad``, ``blocks`` and ``edid`` fields, set ``start_block`` to 0 and -zero the ``reserved`` array. It is not possible to set part of an EDID, -it is always all or nothing. Setting the EDID data is only valid for -receivers as it makes no sense for a transmitter. - -The driver assumes that the full EDID is passed in. If there are more -EDID blocks than the hardware can handle then the EDID is not written, -but instead the error code ``E2BIG`` is set and ``blocks`` is set to the -maximum that the hardware supports. If ``start_block`` is any value -other than 0 then the error code ``EINVAL`` is set. - -To disable an EDID you set ``blocks`` to 0. Depending on the hardware -this will drive the hotplug pin low and/or block the source from reading -the EDID data in some way. In any case, the end result is the same: the -EDID is no longer available. - - -.. c:type:: v4l2_edid - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_edid - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``pad`` - - Pad for which to get/set the EDID blocks. When used with a video - device node the pad represents the input or output index as - returned by :ref:`VIDIOC_ENUMINPUT` and - :ref:`VIDIOC_ENUMOUTPUT` respectively. - * - __u32 - - ``start_block`` - - Read the EDID from starting with this block. Must be 0 when - setting the EDID. - * - __u32 - - ``blocks`` - - The number of blocks to get or set. Must be less or equal to 256 - (the maximum number of blocks as defined by the standard). When - you set the EDID and ``blocks`` is 0, then the EDID is disabled or - erased. - * - __u32 - - ``reserved``\ [5] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - * - __u8 * - - ``edid`` - - Pointer to memory that contains the EDID. The minimum size is - ``blocks`` * 128. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -``ENODATA`` - The EDID data is not available. - -``E2BIG`` - The EDID data you provided is more than the hardware can handle. diff --git a/Documentation/media/uapi/v4l/vidioc-g-enc-index.rst b/Documentation/media/uapi/v4l/vidioc-g-enc-index.rst deleted file mode 100644 index e285a1f14cdf..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-enc-index.rst +++ /dev/null @@ -1,156 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_ENC_INDEX: - -************************ -ioctl VIDIOC_G_ENC_INDEX -************************ - -Name -==== - -VIDIOC_G_ENC_INDEX - Get meta data about a compressed video stream - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_ENC_INDEX, struct v4l2_enc_idx *argp ) - :name: VIDIOC_G_ENC_INDEX - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_enc_idx`. - - -Description -=========== - -The :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` ioctl provides meta data about a compressed -video stream the same or another application currently reads from the -driver, which is useful for random access into the stream without -decoding it. - -To read the data applications must call :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` with a -pointer to a struct :c:type:`v4l2_enc_idx`. On success -the driver fills the ``entry`` array, stores the number of elements -written in the ``entries`` field, and initializes the ``entries_cap`` -field. - -Each element of the ``entry`` array contains meta data about one -picture. A :ref:`VIDIOC_G_ENC_INDEX <VIDIOC_G_ENC_INDEX>` call reads up to -``V4L2_ENC_IDX_ENTRIES`` entries from a driver buffer, which can hold up -to ``entries_cap`` entries. This number can be lower or higher than -``V4L2_ENC_IDX_ENTRIES``, but not zero. When the application fails to -read the meta data in time the oldest entries will be lost. When the -buffer is empty or no capturing/encoding is in progress, ``entries`` -will be zero. - -Currently this ioctl is only defined for MPEG-2 program streams and -video elementary streams. - - -.. tabularcolumns:: |p{3.8cm}|p{5.6cm}|p{8.1cm}| - -.. c:type:: v4l2_enc_idx - -.. flat-table:: struct v4l2_enc_idx - :header-rows: 0 - :stub-columns: 0 - :widths: 1 3 8 - - * - __u32 - - ``entries`` - - The number of entries the driver stored in the ``entry`` array. - * - __u32 - - ``entries_cap`` - - The number of entries the driver can buffer. Must be greater than - zero. - * - __u32 - - ``reserved``\ [4] - - Reserved for future extensions. Drivers must set the - array to zero. - * - struct :c:type:`v4l2_enc_idx_entry` - - ``entry``\ [``V4L2_ENC_IDX_ENTRIES``] - - Meta data about a compressed video stream. Each element of the - array corresponds to one picture, sorted in ascending order by - their ``offset``. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_enc_idx_entry - -.. flat-table:: struct v4l2_enc_idx_entry - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u64 - - ``offset`` - - The offset in bytes from the beginning of the compressed video - stream to the beginning of this picture, that is a *PES packet - header* as defined in :ref:`mpeg2part1` or a *picture header* as - defined in :ref:`mpeg2part2`. When the encoder is stopped, the - driver resets the offset to zero. - * - __u64 - - ``pts`` - - The 33 bit *Presentation Time Stamp* of this picture as defined in - :ref:`mpeg2part1`. - * - __u32 - - ``length`` - - The length of this picture in bytes. - * - __u32 - - ``flags`` - - Flags containing the coding type of this picture, see - :ref:`enc-idx-flags`. - * - __u32 - - ``reserved``\ [2] - - Reserved for future extensions. Drivers must set the array to - zero. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _enc-idx-flags: - -.. flat-table:: Index Entry Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_ENC_IDX_FRAME_I`` - - 0x00 - - This is an Intra-coded picture. - * - ``V4L2_ENC_IDX_FRAME_P`` - - 0x01 - - This is a Predictive-coded picture. - * - ``V4L2_ENC_IDX_FRAME_B`` - - 0x02 - - This is a Bidirectionally predictive-coded picture. - * - ``V4L2_ENC_IDX_FRAME_MASK`` - - 0x0F - - *AND* the flags field with this mask to obtain the picture coding - type. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst b/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst deleted file mode 100644 index cdb2a2a512d6..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst +++ /dev/null @@ -1,416 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_EXT_CTRLS: - -****************************************************************** -ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS -****************************************************************** - -Name -==== - -VIDIOC_G_EXT_CTRLS - VIDIOC_S_EXT_CTRLS - VIDIOC_TRY_EXT_CTRLS - Get or set the value of several controls, try control values - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_EXT_CTRLS, struct v4l2_ext_controls *argp ) - :name: VIDIOC_G_EXT_CTRLS - - -.. c:function:: int ioctl( int fd, VIDIOC_S_EXT_CTRLS, struct v4l2_ext_controls *argp ) - :name: VIDIOC_S_EXT_CTRLS - - -.. c:function:: int ioctl( int fd, VIDIOC_TRY_EXT_CTRLS, struct v4l2_ext_controls *argp ) - :name: VIDIOC_TRY_EXT_CTRLS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_ext_controls`. - - -Description -=========== - -These ioctls allow the caller to get or set multiple controls -atomically. Control IDs are grouped into control classes (see -:ref:`ctrl-class`) and all controls in the control array must belong -to the same control class. - -Applications must always fill in the ``count``, ``which``, ``controls`` -and ``reserved`` fields of struct -:c:type:`v4l2_ext_controls`, and initialize the -struct :c:type:`v4l2_ext_control` array pointed to -by the ``controls`` fields. - -To get the current value of a set of controls applications initialize -the ``id``, ``size`` and ``reserved2`` fields of each struct -:c:type:`v4l2_ext_control` and call the -:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. String controls controls must also set the -``string`` field. Controls of compound types -(``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is set) must set the ``ptr`` field. - -If the ``size`` is too small to receive the control result (only -relevant for pointer-type controls like strings), then the driver will -set ``size`` to a valid value and return an ``ENOSPC`` error code. You -should re-allocate the memory to this new size and try again. For the -string type it is possible that the same issue occurs again if the -string has grown in the meantime. It is recommended to call -:ref:`VIDIOC_QUERYCTRL` first and use -``maximum``\ +1 as the new ``size`` value. It is guaranteed that that is -sufficient memory. - -N-dimensional arrays are set and retrieved row-by-row. You cannot set a -partial array, all elements have to be set or retrieved. The total size -is calculated as ``elems`` * ``elem_size``. These values can be obtained -by calling :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>`. - -To change the value of a set of controls applications initialize the -``id``, ``size``, ``reserved2`` and ``value/value64/string/ptr`` fields -of each struct :c:type:`v4l2_ext_control` and call -the :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. The controls will only be set if *all* -control values are valid. - -To check if a set of controls have correct values applications -initialize the ``id``, ``size``, ``reserved2`` and -``value/value64/string/ptr`` fields of each struct -:c:type:`v4l2_ext_control` and call the -:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. It is up to the driver whether wrong -values are automatically adjusted to a valid value or if an error is -returned. - -When the ``id`` or ``which`` is invalid drivers return an ``EINVAL`` error -code. When the value is out of bounds drivers can choose to take the -closest valid value or return an ``ERANGE`` error code, whatever seems more -appropriate. In the first case the new value is set in struct -:c:type:`v4l2_ext_control`. If the new control value -is inappropriate (e.g. the given menu index is not supported by the menu -control), then this will also result in an ``EINVAL`` error code error. - -If ``request_fd`` is set to a not-yet-queued :ref:`request <media-request-api>` -file descriptor and ``which`` is set to ``V4L2_CTRL_WHICH_REQUEST_VAL``, -then the controls are not applied immediately when calling -:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, but instead are applied by -the driver for the buffer associated with the same request. -If the device does not support requests, then ``EACCES`` will be returned. -If requests are supported but an invalid request file descriptor is given, -then ``EINVAL`` will be returned. - -An attempt to call :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` for a -request that has already been queued will result in an ``EBUSY`` error. - -If ``request_fd`` is specified and ``which`` is set to -``V4L2_CTRL_WHICH_REQUEST_VAL`` during a call to -:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, then it will return the -values of the controls at the time of request completion. -If the request is not yet completed, then this will result in an -``EACCES`` error. - -The driver will only set/get these controls if all control values are -correct. This prevents the situation where only some of the controls -were set/get. Only low-level errors (e. g. a failed i2c command) can -still cause this situation. - - -.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{1.5cm}|p{11.8cm}| - -.. c:type:: v4l2_ext_control - -.. cssclass: longtable - -.. flat-table:: struct v4l2_ext_control - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``id`` - - Identifies the control, set by the application. - * - __u32 - - ``size`` - - The total size in bytes of the payload of this control. This is - normally 0, but for pointer controls this should be set to the - size of the memory containing the payload, or that will receive - the payload. If :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` finds that this value is - less than is required to store the payload result, then it is set - to a value large enough to store the payload result and ``ENOSPC`` is - returned. - - .. note:: - - For string controls, this ``size`` field should - not be confused with the length of the string. This field refers - to the size of the memory that contains the string. The actual - *length* of the string may well be much smaller. - * - __u32 - - ``reserved2``\ [1] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - * - union { - - (anonymous) - * - __s32 - - ``value`` - - New value or current value. Valid if this control is not of type - ``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is - not set. - * - __s64 - - ``value64`` - - New value or current value. Valid if this control is of type - ``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is - not set. - * - char * - - ``string`` - - A pointer to a string. Valid if this control is of type - ``V4L2_CTRL_TYPE_STRING``. - * - __u8 * - - ``p_u8`` - - A pointer to a matrix control of unsigned 8-bit values. Valid if - this control is of type ``V4L2_CTRL_TYPE_U8``. - * - __u16 * - - ``p_u16`` - - A pointer to a matrix control of unsigned 16-bit values. Valid if - this control is of type ``V4L2_CTRL_TYPE_U16``. - * - __u32 * - - ``p_u32`` - - A pointer to a matrix control of unsigned 32-bit values. Valid if - this control is of type ``V4L2_CTRL_TYPE_U32``. - * - :c:type:`v4l2_area` * - - ``p_area`` - - A pointer to a struct :c:type:`v4l2_area`. Valid if this control is - of type ``V4L2_CTRL_TYPE_AREA``. - * - void * - - ``ptr`` - - A pointer to a compound type which can be an N-dimensional array - and/or a compound type (the control's type is >= - ``V4L2_CTRL_COMPOUND_TYPES``). Valid if - ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is set for this control. - * - } - - - - -.. tabularcolumns:: |p{4.0cm}|p{2.2cm}|p{2.1cm}|p{8.2cm}| - -.. c:type:: v4l2_ext_controls - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_ext_controls - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - union { - - (anonymous) - * - __u32 - - ``ctrl_class`` - - The control class to which all controls belong, see - :ref:`ctrl-class`. Drivers that use a kernel framework for - handling controls will also accept a value of 0 here, meaning that - the controls can belong to any control class. Whether drivers - support this can be tested by setting ``ctrl_class`` to 0 and - calling :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` with a ``count`` of 0. If that - succeeds, then the driver supports this feature. - * - __u32 - - ``which`` - - Which value of the control to get/set/try. - ``V4L2_CTRL_WHICH_CUR_VAL`` will return the current value of the - control, ``V4L2_CTRL_WHICH_DEF_VAL`` will return the default - value of the control and ``V4L2_CTRL_WHICH_REQUEST_VAL`` indicates that - these controls have to be retrieved from a request or tried/set for - a request. In the latter case the ``request_fd`` field contains the - file descriptor of the request that should be used. If the device - does not support requests, then ``EACCES`` will be returned. - - .. note:: - - When using ``V4L2_CTRL_WHICH_DEF_VAL`` be aware that you can only - get the default value of the control, you cannot set or try it. - - For backwards compatibility you can also use a control class here - (see :ref:`ctrl-class`). In that case all controls have to - belong to that control class. This usage is deprecated, instead - just use ``V4L2_CTRL_WHICH_CUR_VAL``. There are some very old - drivers that do not yet support ``V4L2_CTRL_WHICH_CUR_VAL`` and - that require a control class here. You can test for such drivers - by setting ctrl_class to ``V4L2_CTRL_WHICH_CUR_VAL`` and calling - VIDIOC_TRY_EXT_CTRLS with a count of 0. If that fails, then the - driver does not support ``V4L2_CTRL_WHICH_CUR_VAL``. - * - } - - - * - __u32 - - ``count`` - - The number of controls in the controls array. May also be zero. - * - __u32 - - ``error_idx`` - - Set by the driver in case of an error. If the error is associated - with a particular control, then ``error_idx`` is set to the index - of that control. If the error is not related to a specific - control, or the validation step failed (see below), then - ``error_idx`` is set to ``count``. The value is undefined if the - ioctl returned 0 (success). - - Before controls are read from/written to hardware a validation - step takes place: this checks if all controls in the list are - valid controls, if no attempt is made to write to a read-only - control or read from a write-only control, and any other up-front - checks that can be done without accessing the hardware. The exact - validations done during this step are driver dependent since some - checks might require hardware access for some devices, thus making - it impossible to do those checks up-front. However, drivers should - make a best-effort to do as many up-front checks as possible. - - This check is done to avoid leaving the hardware in an - inconsistent state due to easy-to-avoid problems. But it leads to - another problem: the application needs to know whether an error - came from the validation step (meaning that the hardware was not - touched) or from an error during the actual reading from/writing - to hardware. - - The, in hindsight quite poor, solution for that is to set - ``error_idx`` to ``count`` if the validation failed. This has the - unfortunate side-effect that it is not possible to see which - control failed the validation. If the validation was successful - and the error happened while accessing the hardware, then - ``error_idx`` is less than ``count`` and only the controls up to - ``error_idx-1`` were read or written correctly, and the state of - the remaining controls is undefined. - - Since :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` does not access hardware there is - also no need to handle the validation step in this special way, so - ``error_idx`` will just be set to the control that failed the - validation step instead of to ``count``. This means that if - :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` fails with ``error_idx`` set to ``count``, - then you can call :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` to try to discover the - actual control that failed the validation step. Unfortunately, - there is no ``TRY`` equivalent for :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`. - * - __s32 - - ``request_fd`` - - File descriptor of the request to be used by this operation. Only - valid if ``which`` is set to ``V4L2_CTRL_WHICH_REQUEST_VAL``. - If the device does not support requests, then ``EACCES`` will be returned. - If requests are supported but an invalid request file descriptor is - given, then ``EINVAL`` will be returned. - * - __u32 - - ``reserved``\ [1] - - Reserved for future extensions. - - Drivers and applications must set the array to zero. - * - struct :c:type:`v4l2_ext_control` * - - ``controls`` - - Pointer to an array of ``count`` v4l2_ext_control structures. - - Ignored if ``count`` equals zero. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _ctrl-class: - -.. flat-table:: Control classes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_CTRL_CLASS_USER`` - - 0x980000 - - The class containing user controls. These controls are described - in :ref:`control`. All controls that can be set using the - :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` and - :ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` ioctl belong to this - class. - * - ``V4L2_CTRL_CLASS_MPEG`` - - 0x990000 - - The class containing MPEG compression controls. These controls are - described in :ref:`mpeg-controls`. - * - ``V4L2_CTRL_CLASS_CAMERA`` - - 0x9a0000 - - The class containing camera controls. These controls are described - in :ref:`camera-controls`. - * - ``V4L2_CTRL_CLASS_FM_TX`` - - 0x9b0000 - - The class containing FM Transmitter (FM TX) controls. These - controls are described in :ref:`fm-tx-controls`. - * - ``V4L2_CTRL_CLASS_FLASH`` - - 0x9c0000 - - The class containing flash device controls. These controls are - described in :ref:`flash-controls`. - * - ``V4L2_CTRL_CLASS_JPEG`` - - 0x9d0000 - - The class containing JPEG compression controls. These controls are - described in :ref:`jpeg-controls`. - * - ``V4L2_CTRL_CLASS_IMAGE_SOURCE`` - - 0x9e0000 - - The class containing image source controls. These controls are - described in :ref:`image-source-controls`. - * - ``V4L2_CTRL_CLASS_IMAGE_PROC`` - - 0x9f0000 - - The class containing image processing controls. These controls are - described in :ref:`image-process-controls`. - * - ``V4L2_CTRL_CLASS_FM_RX`` - - 0xa10000 - - The class containing FM Receiver (FM RX) controls. These controls - are described in :ref:`fm-rx-controls`. - * - ``V4L2_CTRL_CLASS_RF_TUNER`` - - 0xa20000 - - The class containing RF tuner controls. These controls are - described in :ref:`rf-tuner-controls`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_ext_control` ``id`` is - invalid, or the struct :c:type:`v4l2_ext_controls` - ``which`` is invalid, or the struct - :c:type:`v4l2_ext_control` ``value`` was - inappropriate (e.g. the given menu index is not supported by the - driver), or the ``which`` field was set to ``V4L2_CTRL_WHICH_REQUEST_VAL`` - but the given ``request_fd`` was invalid or ``V4L2_CTRL_WHICH_REQUEST_VAL`` - is not supported by the kernel. - This error code is also returned by the - :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctls if two or - more control values are in conflict. - -ERANGE - The struct :c:type:`v4l2_ext_control` ``value`` - is out of bounds. - -EBUSY - The control is temporarily not changeable, possibly because another - applications took over control of the device function this control - belongs to, or (if the ``which`` field was set to - ``V4L2_CTRL_WHICH_REQUEST_VAL``) the request was queued but not yet - completed. - -ENOSPC - The space reserved for the control's payload is insufficient. The - field ``size`` is set to a value that is enough to store the payload - and this error code is returned. - -EACCES - Attempt to try or set a read-only control, or to get a write-only - control, or to get a control from a request that has not yet been - completed. - - Or the ``which`` field was set to ``V4L2_CTRL_WHICH_REQUEST_VAL`` but the - device does not support requests. diff --git a/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst b/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst deleted file mode 100644 index 2d197e6bba8f..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst +++ /dev/null @@ -1,362 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_FBUF: - -********************************** -ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF -********************************** - -Name -==== - -VIDIOC_G_FBUF - VIDIOC_S_FBUF - Get or set frame buffer overlay parameters - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_FBUF, struct v4l2_framebuffer *argp ) - :name: VIDIOC_G_FBUF - -.. c:function:: int ioctl( int fd, VIDIOC_S_FBUF, const struct v4l2_framebuffer *argp ) - :name: VIDIOC_S_FBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_framebuffer`. - - -Description -=========== - -Applications can use the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` and :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` ioctl -to get and set the framebuffer parameters for a -:ref:`Video Overlay <overlay>` or :ref:`Video Output Overlay <osd>` -(OSD). The type of overlay is implied by the device type (capture or -output device) and can be determined with the -:ref:`VIDIOC_QUERYCAP` ioctl. One ``/dev/videoN`` -device must not support both kinds of overlay. - -The V4L2 API distinguishes destructive and non-destructive overlays. A -destructive overlay copies captured video images into the video memory -of a graphics card. A non-destructive overlay blends video images into a -VGA signal or graphics into a video signal. *Video Output Overlays* are -always non-destructive. - -To get the current parameters applications call the :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` -ioctl with a pointer to a struct :c:type:`v4l2_framebuffer` -structure. The driver fills all fields of the structure or returns an -EINVAL error code when overlays are not supported. - -To set the parameters for a *Video Output Overlay*, applications must -initialize the ``flags`` field of a struct -:c:type:`v4l2_framebuffer`. Since the framebuffer is -implemented on the TV card all other parameters are determined by the -driver. When an application calls :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` with a pointer to -this structure, the driver prepares for the overlay and returns the -framebuffer parameters as :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` does, or it returns an error -code. - -To set the parameters for a *non-destructive Video Overlay*, -applications must initialize the ``flags`` field, the ``fmt`` -substructure, and call :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>`. Again the driver prepares for -the overlay and returns the framebuffer parameters as :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>` -does, or it returns an error code. - -For a *destructive Video Overlay* applications must additionally provide -a ``base`` address. Setting up a DMA to a random memory location can -jeopardize the system security, its stability or even damage the -hardware, therefore only the superuser can set the parameters for a -destructive video overlay. - - -.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}| - -.. c:type:: v4l2_framebuffer - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_framebuffer - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 1 2 - - * - __u32 - - ``capability`` - - - - Overlay capability flags set by the driver, see - :ref:`framebuffer-cap`. - * - __u32 - - ``flags`` - - - - Overlay control flags set by application and driver, see - :ref:`framebuffer-flags` - * - void * - - ``base`` - - - - Physical base address of the framebuffer, that is the address of - the pixel in the top left corner of the framebuffer. [#f1]_ - * - - - - - - - This field is irrelevant to *non-destructive Video Overlays*. For - *destructive Video Overlays* applications must provide a base - address. The driver may accept only base addresses which are a - multiple of two, four or eight bytes. For *Video Output Overlays* - the driver must return a valid base address, so applications can - find the corresponding Linux framebuffer device (see - :ref:`osd`). - * - struct - - ``fmt`` - - - - Layout of the frame buffer. - * - - - __u32 - - ``width`` - - Width of the frame buffer in pixels. - * - - - __u32 - - ``height`` - - Height of the frame buffer in pixels. - * - - - __u32 - - ``pixelformat`` - - The pixel format of the framebuffer. - * - - - - - - - For *non-destructive Video Overlays* this field only defines a - format for the struct :c:type:`v4l2_window` - ``chromakey`` field. - * - - - - - - - For *destructive Video Overlays* applications must initialize this - field. For *Video Output Overlays* the driver must return a valid - format. - * - - - - - - - Usually this is an RGB format (for example - :ref:`V4L2_PIX_FMT_RGB565 <V4L2-PIX-FMT-RGB565>`) but YUV - formats (only packed YUV formats when chroma keying is used, not - including ``V4L2_PIX_FMT_YUYV`` and ``V4L2_PIX_FMT_UYVY``) and the - ``V4L2_PIX_FMT_PAL8`` format are also permitted. The behavior of - the driver when an application requests a compressed format is - undefined. See :ref:`pixfmt` for information on pixel formats. - * - - - enum :c:type:`v4l2_field` - - ``field`` - - Drivers and applications shall ignore this field. If applicable, - the field order is selected with the - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, using the ``field`` - field of struct :c:type:`v4l2_window`. - * - - - __u32 - - ``bytesperline`` - - Distance in bytes between the leftmost pixels in two adjacent - lines. - * - :cspan:`3` - - This field is irrelevant to *non-destructive Video Overlays*. - - For *destructive Video Overlays* both applications and drivers can - set this field to request padding bytes at the end of each line. - Drivers however may ignore the requested value, returning - ``width`` times bytes-per-pixel or a larger value required by the - hardware. That implies applications can just set this field to - zero to get a reasonable default. - - For *Video Output Overlays* the driver must return a valid value. - - Video hardware may access padding bytes, therefore they must - reside in accessible memory. Consider for example the case where - padding bytes after the last line of an image cross a system page - boundary. Capture devices may write padding bytes, the value is - undefined. Output devices ignore the contents of padding bytes. - - When the image format is planar the ``bytesperline`` value applies - to the first plane and is divided by the same factor as the - ``width`` field for the other planes. For example the Cb and Cr - planes of a YUV 4:2:0 image have half as many padding bytes - following each line as the Y plane. To avoid ambiguities drivers - must return a ``bytesperline`` value rounded up to a multiple of - the scale factor. - * - - - __u32 - - ``sizeimage`` - - This field is irrelevant to *non-destructive Video Overlays*. For - *destructive Video Overlays* applications must initialize this - field. For *Video Output Overlays* the driver must return a valid - format. - - Together with ``base`` it defines the framebuffer memory - accessible by the driver. - * - - - enum :c:type:`v4l2_colorspace` - - ``colorspace`` - - This information supplements the ``pixelformat`` and must be set - by the driver, see :ref:`colorspaces`. - * - - - __u32 - - ``priv`` - - Reserved. Drivers and applications must set this field to zero. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _framebuffer-cap: - -.. flat-table:: Frame Buffer Capability Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_FBUF_CAP_EXTERNOVERLAY`` - - 0x0001 - - The device is capable of non-destructive overlays. When the driver - clears this flag, only destructive overlays are supported. There - are no drivers yet which support both destructive and - non-destructive overlays. Video Output Overlays are in practice - always non-destructive. - * - ``V4L2_FBUF_CAP_CHROMAKEY`` - - 0x0002 - - The device supports clipping by chroma-keying the images. That is, - image pixels replace pixels in the VGA or video signal only where - the latter assume a certain color. Chroma-keying makes no sense - for destructive overlays. - * - ``V4L2_FBUF_CAP_LIST_CLIPPING`` - - 0x0004 - - The device supports clipping using a list of clip rectangles. - * - ``V4L2_FBUF_CAP_BITMAP_CLIPPING`` - - 0x0008 - - The device supports clipping using a bit mask. - * - ``V4L2_FBUF_CAP_LOCAL_ALPHA`` - - 0x0010 - - The device supports clipping/blending using the alpha channel of - the framebuffer or VGA signal. Alpha blending makes no sense for - destructive overlays. - * - ``V4L2_FBUF_CAP_GLOBAL_ALPHA`` - - 0x0020 - - The device supports alpha blending using a global alpha value. - Alpha blending makes no sense for destructive overlays. - * - ``V4L2_FBUF_CAP_LOCAL_INV_ALPHA`` - - 0x0040 - - The device supports clipping/blending using the inverted alpha - channel of the framebuffer or VGA signal. Alpha blending makes no - sense for destructive overlays. - * - ``V4L2_FBUF_CAP_SRC_CHROMAKEY`` - - 0x0080 - - The device supports Source Chroma-keying. Video pixels with the - chroma-key colors are replaced by framebuffer pixels, which is - exactly opposite of ``V4L2_FBUF_CAP_CHROMAKEY`` - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _framebuffer-flags: - -.. cssclass:: longtable - -.. flat-table:: Frame Buffer Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_FBUF_FLAG_PRIMARY`` - - 0x0001 - - The framebuffer is the primary graphics surface. In other words, - the overlay is destructive. This flag is typically set by any - driver that doesn't have the ``V4L2_FBUF_CAP_EXTERNOVERLAY`` - capability and it is cleared otherwise. - * - ``V4L2_FBUF_FLAG_OVERLAY`` - - 0x0002 - - If this flag is set for a video capture device, then the driver - will set the initial overlay size to cover the full framebuffer - size, otherwise the existing overlay size (as set by - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) will be used. Only one - video capture driver (bttv) supports this flag. The use of this - flag for capture devices is deprecated. There is no way to detect - which drivers support this flag, so the only reliable method of - setting the overlay size is through - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`. If this flag is set for a - video output device, then the video output overlay window is - relative to the top-left corner of the framebuffer and restricted - to the size of the framebuffer. If it is cleared, then the video - output overlay window is relative to the video output display. - * - ``V4L2_FBUF_FLAG_CHROMAKEY`` - - 0x0004 - - Use chroma-keying. The chroma-key color is determined by the - ``chromakey`` field of struct :c:type:`v4l2_window` - and negotiated with the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` - ioctl, see :ref:`overlay` and :ref:`osd`. - * - :cspan:`2` There are no flags to enable clipping using a list of - clip rectangles or a bitmap. These methods are negotiated with the - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, see :ref:`overlay` - and :ref:`osd`. - * - ``V4L2_FBUF_FLAG_LOCAL_ALPHA`` - - 0x0008 - - Use the alpha channel of the framebuffer to clip or blend - framebuffer pixels with video images. The blend function is: - output = framebuffer pixel * alpha + video pixel * (1 - alpha). - The actual alpha depth depends on the framebuffer pixel format. - * - ``V4L2_FBUF_FLAG_GLOBAL_ALPHA`` - - 0x0010 - - Use a global alpha value to blend the framebuffer with video - images. The blend function is: output = (framebuffer pixel * alpha - + video pixel * (255 - alpha)) / 255. The alpha value is - determined by the ``global_alpha`` field of struct - :c:type:`v4l2_window` and negotiated with the - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, see :ref:`overlay` - and :ref:`osd`. - * - ``V4L2_FBUF_FLAG_LOCAL_INV_ALPHA`` - - 0x0020 - - Like ``V4L2_FBUF_FLAG_LOCAL_ALPHA``, use the alpha channel of the - framebuffer to clip or blend framebuffer pixels with video images, - but with an inverted alpha value. The blend function is: output = - framebuffer pixel * (1 - alpha) + video pixel * alpha. The actual - alpha depth depends on the framebuffer pixel format. - * - ``V4L2_FBUF_FLAG_SRC_CHROMAKEY`` - - 0x0040 - - Use source chroma-keying. The source chroma-key color is - determined by the ``chromakey`` field of struct - :c:type:`v4l2_window` and negotiated with the - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl, see :ref:`overlay` - and :ref:`osd`. Both chroma-keying are mutual exclusive to each - other, so same ``chromakey`` field of struct - :c:type:`v4l2_window` is being used. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EPERM - :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` can only be called by a privileged user to - negotiate the parameters for a destructive overlay. - -EINVAL - The :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` parameters are unsuitable. - -.. [#f1] - A physical base address may not suit all platforms. GK notes in - theory we should pass something like PCI device + memory region + - offset instead. If you encounter problems please discuss on the - linux-media mailing list: - `https://linuxtv.org/lists.php <https://linuxtv.org/lists.php>`__. diff --git a/Documentation/media/uapi/v4l/vidioc-g-fmt.rst b/Documentation/media/uapi/v4l/vidioc-g-fmt.rst deleted file mode 100644 index 1e69bfc46e8d..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-fmt.rst +++ /dev/null @@ -1,161 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_FMT: - -************************************************ -ioctl VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT -************************************************ - -Name -==== - -VIDIOC_G_FMT - VIDIOC_S_FMT - VIDIOC_TRY_FMT - Get or set the data format, try a format - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_FMT, struct v4l2_format *argp ) - :name: VIDIOC_G_FMT - -.. c:function:: int ioctl( int fd, VIDIOC_S_FMT, struct v4l2_format *argp ) - :name: VIDIOC_S_FMT - -.. c:function:: int ioctl( int fd, VIDIOC_TRY_FMT, struct v4l2_format *argp ) - :name: VIDIOC_TRY_FMT - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_format`. - - -Description -=========== - -These ioctls are used to negotiate the format of data (typically image -format) exchanged between driver and application. - -To query the current parameters applications set the ``type`` field of a -struct :c:type:`v4l2_format` to the respective buffer (stream) -type. For example video capture devices use -``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or -``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``. When the application calls the -:ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` ioctl with a pointer to this structure the driver fills -the respective member of the ``fmt`` union. In case of video capture -devices that is either the struct -:c:type:`v4l2_pix_format` ``pix`` or the struct -:c:type:`v4l2_pix_format_mplane` ``pix_mp`` -member. When the requested buffer type is not supported drivers return -an ``EINVAL`` error code. - -To change the current format parameters applications initialize the -``type`` field and all fields of the respective ``fmt`` union member. -For details see the documentation of the various devices types in -:ref:`devices`. Good practice is to query the current parameters -first, and to modify only those parameters not suitable for the -application. When the application calls the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl with -a pointer to a struct :c:type:`v4l2_format` structure the driver -checks and adjusts the parameters against hardware abilities. Drivers -should not return an error code unless the ``type`` field is invalid, -this is a mechanism to fathom device capabilities and to approach -parameters acceptable for both the application and driver. On success -the driver may program the hardware, allocate resources and generally -prepare for data exchange. Finally the :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl returns -the current format parameters as :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` does. Very simple, -inflexible devices may even ignore all input and always return the -default parameters. However all V4L2 devices exchanging data with the -application must implement the :ref:`VIDIOC_G_FMT <VIDIOC_G_FMT>` and :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` -ioctl. When the requested buffer type is not supported drivers return an -EINVAL error code on a :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` attempt. When I/O is already in -progress or the resource is not available for other reasons drivers -return the ``EBUSY`` error code. - -The :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` ioctl is equivalent to :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` with one -exception: it does not change driver state. It can also be called at any -time, never returning ``EBUSY``. This function is provided to negotiate -parameters, to learn about hardware limitations, without disabling I/O -or possibly time consuming hardware preparations. Although strongly -recommended drivers are not required to implement this ioctl. - -The format as returned by :ref:`VIDIOC_TRY_FMT <VIDIOC_G_FMT>` must be identical to what -:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` returns for the same input or output. - - -.. c:type:: v4l2_format - -.. tabularcolumns:: |p{1.2cm}|p{4.6cm}|p{3.0cm}|p{8.6cm}| - -.. flat-table:: struct v4l2_format - :header-rows: 0 - :stub-columns: 0 - - * - __u32 - - ``type`` - - Type of the data stream, see :c:type:`v4l2_buf_type`. - * - union { - - ``fmt`` - * - struct :c:type:`v4l2_pix_format` - - ``pix`` - - Definition of an image format, see :ref:`pixfmt`, used by video - capture and output devices. - * - struct :c:type:`v4l2_pix_format_mplane` - - ``pix_mp`` - - Definition of an image format, see :ref:`pixfmt`, used by video - capture and output devices that support the - :ref:`multi-planar version of the API <planar-apis>`. - * - struct :c:type:`v4l2_window` - - ``win`` - - Definition of an overlaid image, see :ref:`overlay`, used by - video overlay devices. - * - struct :c:type:`v4l2_vbi_format` - - ``vbi`` - - Raw VBI capture or output parameters. This is discussed in more - detail in :ref:`raw-vbi`. Used by raw VBI capture and output - devices. - * - struct :c:type:`v4l2_sliced_vbi_format` - - ``sliced`` - - Sliced VBI capture or output parameters. See :ref:`sliced` for - details. Used by sliced VBI capture and output devices. - * - struct :c:type:`v4l2_sdr_format` - - ``sdr`` - - Definition of a data format, see :ref:`pixfmt`, used by SDR - capture and output devices. - * - struct :c:type:`v4l2_meta_format` - - ``meta`` - - Definition of a metadata format, see :ref:`meta-formats`, used by - metadata capture devices. - * - __u8 - - ``raw_data``\ [200] - - Place holder for future extensions. - * - } - - - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_format` ``type`` field is - invalid or the requested buffer type not supported. - -EBUSY - The device is busy and cannot change the format. This could be - because or the device is streaming or buffers are allocated or - queued to the driver. Relevant for :ref:`VIDIOC_S_FMT - <VIDIOC_G_FMT>` only. diff --git a/Documentation/media/uapi/v4l/vidioc-g-frequency.rst b/Documentation/media/uapi/v4l/vidioc-g-frequency.rst deleted file mode 100644 index cc30bae3dd6e..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-frequency.rst +++ /dev/null @@ -1,112 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_FREQUENCY: - -******************************************** -ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY -******************************************** - -Name -==== - -VIDIOC_G_FREQUENCY - VIDIOC_S_FREQUENCY - Get or set tuner or modulator radio frequency - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_FREQUENCY, struct v4l2_frequency *argp ) - :name: VIDIOC_G_FREQUENCY - -.. c:function:: int ioctl( int fd, VIDIOC_S_FREQUENCY, const struct v4l2_frequency *argp ) - :name: VIDIOC_S_FREQUENCY - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_frequency`. - - -Description -=========== - -To get the current tuner or modulator radio frequency applications set -the ``tuner`` field of a struct -:c:type:`v4l2_frequency` to the respective tuner or -modulator number (only input devices have tuners, only output devices -have modulators), zero out the ``reserved`` array and call the -:ref:`VIDIOC_G_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl with a pointer to this structure. The -driver stores the current frequency in the ``frequency`` field. - -To change the current tuner or modulator radio frequency applications -initialize the ``tuner``, ``type`` and ``frequency`` fields, and the -``reserved`` array of a struct :c:type:`v4l2_frequency` -and call the :ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl with a pointer to this -structure. When the requested frequency is not possible the driver -assumes the closest possible value. However :ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` is a -write-only ioctl, it does not return the actual new frequency. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_frequency - -.. flat-table:: struct v4l2_frequency - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``tuner`` - - The tuner or modulator index number. This is the same value as in - the struct :c:type:`v4l2_input` ``tuner`` field and - the struct :c:type:`v4l2_tuner` ``index`` field, or - the struct :c:type:`v4l2_output` ``modulator`` field - and the struct :c:type:`v4l2_modulator` ``index`` - field. - * - __u32 - - ``type`` - - The tuner type. This is the same value as in the struct - :c:type:`v4l2_tuner` ``type`` field. The type must be - set to ``V4L2_TUNER_RADIO`` for ``/dev/radioX`` device nodes, and - to ``V4L2_TUNER_ANALOG_TV`` for all others. Set this field to - ``V4L2_TUNER_RADIO`` for modulators (currently only radio - modulators are supported). See :c:type:`v4l2_tuner_type` - * - __u32 - - ``frequency`` - - Tuning frequency in units of 62.5 kHz, or if the struct - :c:type:`v4l2_tuner` or struct - :c:type:`v4l2_modulator` ``capability`` flag - ``V4L2_TUNER_CAP_LOW`` is set, in units of 62.5 Hz. A 1 Hz unit is - used when the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is set. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The ``tuner`` index is out of bounds or the value in the ``type`` - field is wrong. - -EBUSY - A hardware seek is in progress. diff --git a/Documentation/media/uapi/v4l/vidioc-g-input.rst b/Documentation/media/uapi/v4l/vidioc-g-input.rst deleted file mode 100644 index 76b7d487466e..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-input.rst +++ /dev/null @@ -1,71 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_INPUT: - -************************************ -ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT -************************************ - -Name -==== - -VIDIOC_G_INPUT - VIDIOC_S_INPUT - Query or select the current video input - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_INPUT, int *argp ) - :name: VIDIOC_G_INPUT - -.. c:function:: int ioctl( int fd, VIDIOC_S_INPUT, int *argp ) - :name: VIDIOC_S_INPUT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer an integer with input index. - - -Description -=========== - -To query the current video input applications call the -:ref:`VIDIOC_G_INPUT <VIDIOC_G_INPUT>` ioctl with a pointer to an integer where the driver -stores the number of the input, as in the struct -:c:type:`v4l2_input` ``index`` field. This ioctl will fail -only when there are no video inputs, returning ``EINVAL``. - -To select a video input applications store the number of the desired -input in an integer and call the :ref:`VIDIOC_S_INPUT <VIDIOC_G_INPUT>` ioctl with a pointer -to this integer. Side effects are possible. For example inputs may -support different video standards, so the driver may implicitly switch -the current standard. Because of these possible side effects -applications must select an input before querying or negotiating any -other parameters. - -Information about video inputs is available using the -:ref:`VIDIOC_ENUMINPUT` ioctl. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The number of the video input is out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-g-jpegcomp.rst b/Documentation/media/uapi/v4l/vidioc-g-jpegcomp.rst deleted file mode 100644 index 5480277ab327..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-jpegcomp.rst +++ /dev/null @@ -1,134 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_JPEGCOMP: - -****************************************** -ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP -****************************************** - -Name -==== - -VIDIOC_G_JPEGCOMP - VIDIOC_S_JPEGCOMP - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_JPEGCOMP, v4l2_jpegcompression *argp ) - :name: VIDIOC_G_JPEGCOMP - -.. c:function:: int ioctl( int fd, VIDIOC_S_JPEGCOMP, const v4l2_jpegcompression *argp ) - :name: VIDIOC_S_JPEGCOMP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_jpegcompression`. - - -Description -=========== - -These ioctls are **deprecated**. New drivers and applications should use -:ref:`JPEG class controls <jpeg-controls>` for image quality and JPEG -markers control. - -[to do] - -Ronald Bultje elaborates: - -APP is some application-specific information. The application can set it -itself, and it'll be stored in the JPEG-encoded fields (eg; interlacing -information for in an AVI or so). COM is the same, but it's comments, -like 'encoded by me' or so. - -jpeg_markers describes whether the huffman tables, quantization tables -and the restart interval information (all JPEG-specific stuff) should be -stored in the JPEG-encoded fields. These define how the JPEG field is -encoded. If you omit them, applications assume you've used standard -encoding. You usually do want to add them. - - -.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{13.3cm}| - -.. c:type:: v4l2_jpegcompression - -.. flat-table:: struct v4l2_jpegcompression - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - int - - ``quality`` - - Deprecated. If - :ref:`V4L2_CID_JPEG_COMPRESSION_QUALITY <jpeg-quality-control>` - control is exposed by a driver applications should use it instead - and ignore this field. - * - int - - ``APPn`` - - - * - int - - ``APP_len`` - - - * - char - - ``APP_data``\ [60] - - - * - int - - ``COM_len`` - - - * - char - - ``COM_data``\ [60] - - - * - __u32 - - ``jpeg_markers`` - - See :ref:`jpeg-markers`. Deprecated. If - :ref:`V4L2_CID_JPEG_ACTIVE_MARKER <jpeg-active-marker-control>` - control is exposed by a driver applications should use it instead - and ignore this field. - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _jpeg-markers: - -.. flat-table:: JPEG Markers Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_JPEG_MARKER_DHT`` - - (1<<3) - - Define Huffman Tables - * - ``V4L2_JPEG_MARKER_DQT`` - - (1<<4) - - Define Quantization Tables - * - ``V4L2_JPEG_MARKER_DRI`` - - (1<<5) - - Define Restart Interval - * - ``V4L2_JPEG_MARKER_COM`` - - (1<<6) - - Comment segment - * - ``V4L2_JPEG_MARKER_APP`` - - (1<<7) - - App segment, driver will always use APP0 - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-g-modulator.rst b/Documentation/media/uapi/v4l/vidioc-g-modulator.rst deleted file mode 100644 index 2c33a8bdcc47..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-modulator.rst +++ /dev/null @@ -1,202 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_MODULATOR: - -******************************************** -ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR -******************************************** - -Name -==== - -VIDIOC_G_MODULATOR - VIDIOC_S_MODULATOR - Get or set modulator attributes - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_MODULATOR, struct v4l2_modulator *argp ) - :name: VIDIOC_G_MODULATOR - -.. c:function:: int ioctl( int fd, VIDIOC_S_MODULATOR, const struct v4l2_modulator *argp ) - :name: VIDIOC_S_MODULATOR - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_modulator`. - - -Description -=========== - -To query the attributes of a modulator applications initialize the -``index`` field and zero out the ``reserved`` array of a struct -:c:type:`v4l2_modulator` and call the -:ref:`VIDIOC_G_MODULATOR <VIDIOC_G_MODULATOR>` ioctl with a pointer to this structure. Drivers -fill the rest of the structure or return an ``EINVAL`` error code when the -index is out of bounds. To enumerate all modulators applications shall -begin at index zero, incrementing by one until the driver returns -EINVAL. - -Modulators have two writable properties, an audio modulation set and the -radio frequency. To change the modulated audio subprograms, applications -initialize the ``index`` and ``txsubchans`` fields and the ``reserved`` -array and call the :ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl. Drivers may choose a -different audio modulation if the request cannot be satisfied. However -this is a write-only ioctl, it does not return the actual audio -modulation selected. - -:ref:`SDR <sdr>` specific modulator types are ``V4L2_TUNER_SDR`` and -``V4L2_TUNER_RF``. For SDR devices ``txsubchans`` field must be -initialized to zero. The term 'modulator' means SDR transmitter in this -context. - -To change the radio frequency the -:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl is available. - - -.. tabularcolumns:: |p{2.9cm}|p{2.9cm}|p{5.8cm}|p{2.9cm}|p{3.0cm}| - -.. c:type:: v4l2_modulator - -.. flat-table:: struct v4l2_modulator - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 1 1 - - * - __u32 - - ``index`` - - Identifies the modulator, set by the application. - * - __u8 - - ``name``\ [32] - - Name of the modulator, a NUL-terminated ASCII string. - - This information is intended for the user. - * - __u32 - - ``capability`` - - Modulator capability flags. No flags are defined for this field, - the tuner flags in struct :c:type:`v4l2_tuner` are - used accordingly. The audio flags indicate the ability to encode - audio subprograms. They will *not* change for example with the - current video standard. - * - __u32 - - ``rangelow`` - - The lowest tunable frequency in units of 62.5 KHz, or if the - ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units of - 62.5 Hz, or if the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is - set, in units of 1 Hz. - * - __u32 - - ``rangehigh`` - - The highest tunable frequency in units of 62.5 KHz, or if the - ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units of - 62.5 Hz, or if the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` is - set, in units of 1 Hz. - * - __u32 - - ``txsubchans`` - - With this field applications can determine how audio sub-carriers - shall be modulated. It contains a set of flags as defined in - :ref:`modulator-txsubchans`. - - .. note:: - - The tuner ``rxsubchans`` flags are reused, but the - semantics are different. Video output devices - are assumed to have an analog or PCM audio input with 1-3 - channels. The ``txsubchans`` flags select one or more channels - for modulation, together with some audio subprogram indicator, - for example, a stereo pilot tone. - * - __u32 - - ``type`` - - :cspan:`2` Type of the modulator, see :c:type:`v4l2_tuner_type`. - * - __u32 - - ``reserved``\ [3] - - Reserved for future extensions. - - Drivers and applications must set the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _modulator-txsubchans: - -.. flat-table:: Modulator Audio Transmission Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_TUNER_SUB_MONO`` - - 0x0001 - - Modulate channel 1 as mono audio, when the input has more - channels, a down-mix of channel 1 and 2. This flag does not - combine with ``V4L2_TUNER_SUB_STEREO`` or - ``V4L2_TUNER_SUB_LANG1``. - * - ``V4L2_TUNER_SUB_STEREO`` - - 0x0002 - - Modulate channel 1 and 2 as left and right channel of a stereo - audio signal. When the input has only one channel or two channels - and ``V4L2_TUNER_SUB_SAP`` is also set, channel 1 is encoded as - left and right channel. This flag does not combine with - ``V4L2_TUNER_SUB_MONO`` or ``V4L2_TUNER_SUB_LANG1``. When the - driver does not support stereo audio it shall fall back to mono. - * - ``V4L2_TUNER_SUB_LANG1`` - - 0x0008 - - Modulate channel 1 and 2 as primary and secondary language of a - bilingual audio signal. When the input has only one channel it is - used for both languages. It is not possible to encode the primary - or secondary language only. This flag does not combine with - ``V4L2_TUNER_SUB_MONO``, ``V4L2_TUNER_SUB_STEREO`` or - ``V4L2_TUNER_SUB_SAP``. If the hardware does not support the - respective audio matrix, or the current video standard does not - permit bilingual audio the :ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl shall - return an ``EINVAL`` error code and the driver shall fall back to mono - or stereo mode. - * - ``V4L2_TUNER_SUB_LANG2`` - - 0x0004 - - Same effect as ``V4L2_TUNER_SUB_SAP``. - * - ``V4L2_TUNER_SUB_SAP`` - - 0x0004 - - When combined with ``V4L2_TUNER_SUB_MONO`` the first channel is - encoded as mono audio, the last channel as Second Audio Program. - When the input has only one channel it is used for both audio - tracks. When the input has three channels the mono track is a - down-mix of channel 1 and 2. When combined with - ``V4L2_TUNER_SUB_STEREO`` channel 1 and 2 are encoded as left and - right stereo audio, channel 3 as Second Audio Program. When the - input has only two channels, the first is encoded as left and - right channel and the second as SAP. When the input has only one - channel it is used for all audio tracks. It is not possible to - encode a Second Audio Program only. This flag must combine with - ``V4L2_TUNER_SUB_MONO`` or ``V4L2_TUNER_SUB_STEREO``. If the - hardware does not support the respective audio matrix, or the - current video standard does not permit SAP the - :ref:`VIDIOC_S_MODULATOR <VIDIOC_G_MODULATOR>` ioctl shall return an ``EINVAL`` error code and - driver shall fall back to mono or stereo mode. - * - ``V4L2_TUNER_SUB_RDS`` - - 0x0010 - - Enable the RDS encoder for a radio FM transmitter. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_modulator` ``index`` is - out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-g-output.rst b/Documentation/media/uapi/v4l/vidioc-g-output.rst deleted file mode 100644 index 69542d78977b..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-output.rst +++ /dev/null @@ -1,73 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_OUTPUT: - -************************************** -ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT -************************************** - -Name -==== - -VIDIOC_G_OUTPUT - VIDIOC_S_OUTPUT - Query or select the current video output - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_OUTPUT, int *argp ) - :name: VIDIOC_G_OUTPUT - -.. c:function:: int ioctl( int fd, VIDIOC_S_OUTPUT, int *argp ) - :name: VIDIOC_S_OUTPUT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to an integer with output index. - - -Description -=========== - -To query the current video output applications call the -:ref:`VIDIOC_G_OUTPUT <VIDIOC_G_OUTPUT>` ioctl with a pointer to an integer where the driver -stores the number of the output, as in the struct -:c:type:`v4l2_output` ``index`` field. This ioctl will -fail only when there are no video outputs, returning the ``EINVAL`` error -code. - -To select a video output applications store the number of the desired -output in an integer and call the :ref:`VIDIOC_S_OUTPUT <VIDIOC_G_OUTPUT>` ioctl with a -pointer to this integer. Side effects are possible. For example outputs -may support different video standards, so the driver may implicitly -switch the current standard. standard. Because of these possible side -effects applications must select an output before querying or -negotiating any other parameters. - -Information about video outputs is available using the -:ref:`VIDIOC_ENUMOUTPUT` ioctl. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The number of the video output is out of bounds, or there are no - video outputs at all. diff --git a/Documentation/media/uapi/v4l/vidioc-g-parm.rst b/Documentation/media/uapi/v4l/vidioc-g-parm.rst deleted file mode 100644 index 044a459e073f..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-parm.rst +++ /dev/null @@ -1,270 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_PARM: - -********************************** -ioctl VIDIOC_G_PARM, VIDIOC_S_PARM -********************************** - -Name -==== - -VIDIOC_G_PARM - VIDIOC_S_PARM - Get or set streaming parameters - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_PARM, v4l2_streamparm *argp ) - :name: VIDIOC_G_PARM - -.. c:function:: int ioctl( int fd, VIDIOC_S_PARM, v4l2_streamparm *argp ) - :name: VIDIOC_S_PARM - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_streamparm`. - - -Description -=========== - -The current video standard determines a nominal number of frames per -second. If less than this number of frames is to be captured or output, -applications can request frame skipping or duplicating on the driver -side. This is especially useful when using the :ref:`read() <func-read>` or -:ref:`write() <func-write>`, which are not augmented by timestamps or sequence -counters, and to avoid unnecessary data copying. - -Changing the frame interval shall never change the format. Changing the -format, on the other hand, may change the frame interval. - -Further these ioctls can be used to determine the number of buffers used -internally by a driver in read/write mode. For implications see the -section discussing the :ref:`read() <func-read>` function. - -To get and set the streaming parameters applications call the -:ref:`VIDIOC_G_PARM <VIDIOC_G_PARM>` and :ref:`VIDIOC_S_PARM <VIDIOC_G_PARM>` ioctl, respectively. They take a -pointer to a struct :c:type:`v4l2_streamparm` which contains a -union holding separate parameters for input and output devices. - - -.. tabularcolumns:: |p{3.5cm}|p{3.5cm}|p{3.5cm}|p{7.0cm}| - -.. c:type:: v4l2_streamparm - -.. flat-table:: struct v4l2_streamparm - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - The buffer (stream) type, same as struct - :c:type:`v4l2_format` ``type``, set by the - application. See :c:type:`v4l2_buf_type`. - * - union { - - ``parm`` - * - struct :c:type:`v4l2_captureparm` - - ``capture`` - - Parameters for capture devices, used when ``type`` is - ``V4L2_BUF_TYPE_VIDEO_CAPTURE`` or - ``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE``. - * - struct :c:type:`v4l2_outputparm` - - ``output`` - - Parameters for output devices, used when ``type`` is - ``V4L2_BUF_TYPE_VIDEO_OUTPUT`` or ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``. - * - __u8 - - ``raw_data``\ [200] - - A place holder for future extensions. - * - } - - - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_captureparm - -.. flat-table:: struct v4l2_captureparm - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``capability`` - - See :ref:`parm-caps`. - * - __u32 - - ``capturemode`` - - Set by drivers and applications, see :ref:`parm-flags`. - * - struct :c:type:`v4l2_fract` - - ``timeperframe`` - - This is the desired period between successive frames captured by - the driver, in seconds. The field is intended to skip frames on - the driver side, saving I/O bandwidth. - - Applications store here the desired frame period, drivers return - the actual frame period, which must be greater or equal to the - nominal frame period determined by the current video standard - (struct :c:type:`v4l2_standard` ``frameperiod`` - field). Changing the video standard (also implicitly by switching - the video input) may reset this parameter to the nominal frame - period. To reset manually applications can just set this field to - zero. - - Drivers support this function only when they set the - ``V4L2_CAP_TIMEPERFRAME`` flag in the ``capability`` field. - * - __u32 - - ``extendedmode`` - - Custom (driver specific) streaming parameters. When unused, - applications and drivers must set this field to zero. Applications - using this field should check the driver name and version, see - :ref:`querycap`. - * - __u32 - - ``readbuffers`` - - Applications set this field to the desired number of buffers used - internally by the driver in :ref:`read() <func-read>` mode. - Drivers return the actual number of buffers. When an application - requests zero buffers, drivers should just return the current - setting rather than the minimum or an error code. For details see - :ref:`rw`. - * - __u32 - - ``reserved``\ [4] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_outputparm - -.. flat-table:: struct v4l2_outputparm - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``capability`` - - See :ref:`parm-caps`. - * - __u32 - - ``outputmode`` - - Set by drivers and applications, see :ref:`parm-flags`. - * - struct :c:type:`v4l2_fract` - - ``timeperframe`` - - This is the desired period between successive frames output by the - driver, in seconds. - * - :cspan:`2` - - The field is intended to repeat frames on the driver side in - :ref:`write() <func-write>` mode (in streaming mode timestamps - can be used to throttle the output), saving I/O bandwidth. - - Applications store here the desired frame period, drivers return - the actual frame period, which must be greater or equal to the - nominal frame period determined by the current video standard - (struct :c:type:`v4l2_standard` ``frameperiod`` - field). Changing the video standard (also implicitly by switching - the video output) may reset this parameter to the nominal frame - period. To reset manually applications can just set this field to - zero. - - Drivers support this function only when they set the - ``V4L2_CAP_TIMEPERFRAME`` flag in the ``capability`` field. - * - __u32 - - ``extendedmode`` - - Custom (driver specific) streaming parameters. When unused, - applications and drivers must set this field to zero. Applications - using this field should check the driver name and version, see - :ref:`querycap`. - * - __u32 - - ``writebuffers`` - - Applications set this field to the desired number of buffers used - internally by the driver in :ref:`write() <func-write>` mode. Drivers - return the actual number of buffers. When an application requests - zero buffers, drivers should just return the current setting - rather than the minimum or an error code. For details see - :ref:`rw`. - * - __u32 - - ``reserved``\ [4] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _parm-caps: - -.. flat-table:: Streaming Parameters Capabilities - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_CAP_TIMEPERFRAME`` - - 0x1000 - - The frame skipping/repeating controlled by the ``timeperframe`` - field is supported. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _parm-flags: - -.. flat-table:: Capture Parameters Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_MODE_HIGHQUALITY`` - - 0x0001 - - High quality imaging mode. High quality mode is intended for still - imaging applications. The idea is to get the best possible image - quality that the hardware can deliver. It is not defined how the - driver writer may achieve that; it will depend on the hardware and - the ingenuity of the driver writer. High quality mode is a - different mode from the regular motion video capture modes. In - high quality mode: - - - The driver may be able to capture higher resolutions than for - motion capture. - - - The driver may support fewer pixel formats than motion capture - (eg; true color). - - - The driver may capture and arithmetically combine multiple - successive fields or frames to remove color edge artifacts and - reduce the noise in the video data. - - - The driver may capture images in slices like a scanner in order - to handle larger format images than would otherwise be - possible. - - - An image capture operation may be significantly slower than - motion capture. - - - Moving objects in the image might have excessive motion blur. - - - Capture might only work through the :ref:`read() <func-read>` call. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-g-priority.rst b/Documentation/media/uapi/v4l/vidioc-g-priority.rst deleted file mode 100644 index 244b4dbe9df3..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-priority.rst +++ /dev/null @@ -1,100 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_PRIORITY: - -****************************************** -ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY -****************************************** - -Name -==== - -VIDIOC_G_PRIORITY - VIDIOC_S_PRIORITY - Query or request the access priority associated with a file descriptor - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_PRIORITY, enum v4l2_priority *argp ) - :name: VIDIOC_G_PRIORITY - -.. c:function:: int ioctl( int fd, VIDIOC_S_PRIORITY, const enum v4l2_priority *argp ) - :name: VIDIOC_S_PRIORITY - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to an enum :c:type:`v4l2_priority` type. - - -Description -=========== - -To query the current access priority applications call the -:ref:`VIDIOC_G_PRIORITY <VIDIOC_G_PRIORITY>` ioctl with a pointer to an enum v4l2_priority -variable where the driver stores the current priority. - -To request an access priority applications store the desired priority in -an enum v4l2_priority variable and call :ref:`VIDIOC_S_PRIORITY <VIDIOC_G_PRIORITY>` ioctl -with a pointer to this variable. - - -.. c:type:: v4l2_priority - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. flat-table:: enum v4l2_priority - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_PRIORITY_UNSET`` - - 0 - - - * - ``V4L2_PRIORITY_BACKGROUND`` - - 1 - - Lowest priority, usually applications running in background, for - example monitoring VBI transmissions. A proxy application running - in user space will be necessary if multiple applications want to - read from a device at this priority. - * - ``V4L2_PRIORITY_INTERACTIVE`` - - 2 - - - * - ``V4L2_PRIORITY_DEFAULT`` - - 2 - - Medium priority, usually applications started and interactively - controlled by the user. For example TV viewers, Teletext browsers, - or just "panel" applications to change the channel or video - controls. This is the default priority unless an application - requests another. - * - ``V4L2_PRIORITY_RECORD`` - - 3 - - Highest priority. Only one file descriptor can have this priority, - it blocks any other fd from changing device properties. Usually - applications which must not be interrupted, like video recording. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The requested priority value is invalid. - -EBUSY - Another application already requested higher priority. diff --git a/Documentation/media/uapi/v4l/vidioc-g-selection.rst b/Documentation/media/uapi/v4l/vidioc-g-selection.rst deleted file mode 100644 index 7d8ef7ac8e27..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-selection.rst +++ /dev/null @@ -1,200 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_SELECTION: - -******************************************** -ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION -******************************************** - -Name -==== - -VIDIOC_G_SELECTION - VIDIOC_S_SELECTION - Get or set one of the selection rectangles - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_SELECTION, struct v4l2_selection *argp ) - :name: VIDIOC_G_SELECTION - - -.. c:function:: int ioctl( int fd, VIDIOC_S_SELECTION, struct v4l2_selection *argp ) - :name: VIDIOC_S_SELECTION - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_selection`. - -Description -=========== - -The ioctls are used to query and configure selection rectangles. - -To query the cropping (composing) rectangle set struct -:c:type:`v4l2_selection` ``type`` field to the -respective buffer type. The next step is setting the -value of struct :c:type:`v4l2_selection` ``target`` -field to ``V4L2_SEL_TGT_CROP`` (``V4L2_SEL_TGT_COMPOSE``). Please refer -to table :ref:`v4l2-selections-common` or :ref:`selection-api` for -additional targets. The ``flags`` and ``reserved`` fields of struct -:c:type:`v4l2_selection` are ignored and they must be -filled with zeros. The driver fills the rest of the structure or returns -EINVAL error code if incorrect buffer type or target was used. If -cropping (composing) is not supported then the active rectangle is not -mutable and it is always equal to the bounds rectangle. Finally, the -struct :c:type:`v4l2_rect` ``r`` rectangle is filled with -the current cropping (composing) coordinates. The coordinates are -expressed in driver-dependent units. The only exception are rectangles -for images in raw formats, whose coordinates are always expressed in -pixels. - -To change the cropping (composing) rectangle set the struct -:c:type:`v4l2_selection` ``type`` field to the -respective buffer type. The next step is setting the -value of struct :c:type:`v4l2_selection` ``target`` to -``V4L2_SEL_TGT_CROP`` (``V4L2_SEL_TGT_COMPOSE``). Please refer to table -:ref:`v4l2-selections-common` or :ref:`selection-api` for additional -targets. The struct :c:type:`v4l2_rect` ``r`` rectangle need -to be set to the desired active area. Field struct -:c:type:`v4l2_selection` ``reserved`` is ignored and -must be filled with zeros. The driver may adjust coordinates of the -requested rectangle. An application may introduce constraints to control -rounding behaviour. The struct :c:type:`v4l2_selection` -``flags`` field must be set to one of the following: - -- ``0`` - The driver can adjust the rectangle size freely and shall - choose a crop/compose rectangle as close as possible to the requested - one. - -- ``V4L2_SEL_FLAG_GE`` - The driver is not allowed to shrink the - rectangle. The original rectangle must lay inside the adjusted one. - -- ``V4L2_SEL_FLAG_LE`` - The driver is not allowed to enlarge the - rectangle. The adjusted rectangle must lay inside the original one. - -- ``V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE`` - The driver must choose the - size exactly the same as in the requested rectangle. - -Please refer to :ref:`sel-const-adjust`. - -The driver may have to adjusts the requested dimensions against hardware -limits and other parts as the pipeline, i.e. the bounds given by the -capture/output window or TV display. The closest possible values of -horizontal and vertical offset and sizes are chosen according to -following priority: - -1. Satisfy constraints from struct - :c:type:`v4l2_selection` ``flags``. - -2. Adjust width, height, left, and top to hardware limits and - alignments. - -3. Keep center of adjusted rectangle as close as possible to the - original one. - -4. Keep width and height as close as possible to original ones. - -5. Keep horizontal and vertical offset as close as possible to original - ones. - -On success the struct :c:type:`v4l2_rect` ``r`` field -contains the adjusted rectangle. When the parameters are unsuitable the -application may modify the cropping (composing) or image parameters and -repeat the cycle until satisfactory parameters have been negotiated. If -constraints flags have to be violated at then ``ERANGE`` is returned. The -error indicates that *there exist no rectangle* that satisfies the -constraints. - -Selection targets and flags are documented in -:ref:`v4l2-selections-common`. - - -.. _sel-const-adjust: - -.. kernel-figure:: constraints.svg - :alt: constraints.svg - :align: center - - Size adjustments with constraint flags. - - Behaviour of rectangle adjustment for different constraint flags. - - - - -.. c:type:: v4l2_selection - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_selection - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of the buffer (from enum - :c:type:`v4l2_buf_type`). - * - __u32 - - ``target`` - - Used to select between - :ref:`cropping and composing rectangles <v4l2-selections-common>`. - * - __u32 - - ``flags`` - - Flags controlling the selection rectangle adjustments, refer to - :ref:`selection flags <v4l2-selection-flags>`. - * - struct :c:type:`v4l2_rect` - - ``r`` - - The selection rectangle. - * - __u32 - - ``reserved[9]`` - - Reserved fields for future use. Drivers and applications must zero - this array. - -.. note:: - Unfortunately in the case of multiplanar buffer types - (``V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE`` and ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``) - this API was messed up with regards to how the :c:type:`v4l2_selection` ``type`` field - should be filled in. Some drivers only accepted the ``_MPLANE`` buffer type while - other drivers only accepted a non-multiplanar buffer type (i.e. without the - ``_MPLANE`` at the end). - - Starting with kernel 4.13 both variations are allowed. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - Given buffer type ``type`` or the selection target ``target`` is not - supported, or the ``flags`` argument is not valid. - -ERANGE - It is not possible to adjust struct :c:type:`v4l2_rect` - ``r`` rectangle to satisfy all constraints given in the ``flags`` - argument. - -ENODATA - Selection is not supported for this input or output. - -EBUSY - It is not possible to apply change of the selection rectangle at the - moment. Usually because streaming is in progress. diff --git a/Documentation/media/uapi/v4l/vidioc-g-sliced-vbi-cap.rst b/Documentation/media/uapi/v4l/vidioc-g-sliced-vbi-cap.rst deleted file mode 100644 index 388b826d44b3..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-sliced-vbi-cap.rst +++ /dev/null @@ -1,202 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_SLICED_VBI_CAP: - -***************************** -ioctl VIDIOC_G_SLICED_VBI_CAP -***************************** - -Name -==== - -VIDIOC_G_SLICED_VBI_CAP - Query sliced VBI capabilities - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_SLICED_VBI_CAP, struct v4l2_sliced_vbi_cap *argp ) - :name: VIDIOC_G_SLICED_VBI_CAP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_sliced_vbi_cap`. - - -Description -=========== - -To find out which data services are supported by a sliced VBI capture or -output device, applications initialize the ``type`` field of a struct -:c:type:`v4l2_sliced_vbi_cap`, clear the -``reserved`` array and call the :ref:`VIDIOC_G_SLICED_VBI_CAP <VIDIOC_G_SLICED_VBI_CAP>` ioctl. The -driver fills in the remaining fields or returns an ``EINVAL`` error code if -the sliced VBI API is unsupported or ``type`` is invalid. - -.. note:: - - The ``type`` field was added, and the ioctl changed from read-only - to write-read, in Linux 2.6.19. - - -.. c:type:: v4l2_sliced_vbi_cap - -.. tabularcolumns:: |p{1.2cm}|p{4.2cm}|p{4.1cm}|p{4.0cm}|p{4.0cm}| - -.. flat-table:: struct v4l2_sliced_vbi_cap - :header-rows: 0 - :stub-columns: 0 - :widths: 3 3 2 2 2 - - * - __u16 - - ``service_set`` - - :cspan:`2` A set of all data services supported by the driver. - - Equal to the union of all elements of the ``service_lines`` array. - * - __u16 - - ``service_lines``\ [2][24] - - :cspan:`2` Each element of this array contains a set of data - services the hardware can look for or insert into a particular - scan line. Data services are defined in :ref:`vbi-services`. - Array indices map to ITU-R line numbers\ [#f1]_ as follows: - * - - - - - Element - - 525 line systems - - 625 line systems - * - - - - - ``service_lines``\ [0][1] - - 1 - - 1 - * - - - - - ``service_lines``\ [0][23] - - 23 - - 23 - * - - - - - ``service_lines``\ [1][1] - - 264 - - 314 - * - - - - - ``service_lines``\ [1][23] - - 286 - - 336 - * - - * - - - - - :cspan:`2` The number of VBI lines the hardware can capture or - output per frame, or the number of services it can identify on a - given line may be limited. For example on PAL line 16 the hardware - may be able to look for a VPS or Teletext signal, but not both at - the same time. Applications can learn about these limits using the - :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl as described in - :ref:`sliced`. - * - - * - - - - - :cspan:`2` Drivers must set ``service_lines`` [0][0] and - ``service_lines``\ [1][0] to zero. - * - __u32 - - ``type`` - - Type of the data stream, see :c:type:`v4l2_buf_type`. Should be - ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` or - ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``. - * - __u32 - - ``reserved``\ [3] - - :cspan:`2` This array is reserved for future extensions. - - Applications and drivers must set it to zero. - -.. [#f1] - - See also :ref:`vbi-525` and :ref:`vbi-625`. - - -.. raw:: latex - - \scriptsize - -.. tabularcolumns:: |p{3.5cm}|p{1.0cm}|p{2.0cm}|p{2.0cm}|p{8.0cm}| - -.. _vbi-services: - -.. flat-table:: Sliced VBI services - :header-rows: 1 - :stub-columns: 0 - :widths: 2 1 1 2 2 - - * - Symbol - - Value - - Reference - - Lines, usually - - Payload - * - ``V4L2_SLICED_TELETEXT_B`` (Teletext System B) - - 0x0001 - - :ref:`ets300706`, - - :ref:`itu653` - - PAL/SECAM line 7-22, 320-335 (second field 7-22) - - Last 42 of the 45 byte Teletext packet, that is without clock - run-in and framing code, lsb first transmitted. - * - ``V4L2_SLICED_VPS`` - - 0x0400 - - :ref:`ets300231` - - PAL line 16 - - Byte number 3 to 15 according to Figure 9 of ETS 300 231, lsb - first transmitted. - * - ``V4L2_SLICED_CAPTION_525`` - - 0x1000 - - :ref:`cea608` - - NTSC line 21, 284 (second field 21) - - Two bytes in transmission order, including parity bit, lsb first - transmitted. - * - ``V4L2_SLICED_WSS_625`` - - 0x4000 - - :ref:`en300294`, - - :ref:`itu1119` - - PAL/SECAM line 23 - - - - :: - - Byte 0 1 - msb lsb msb lsb - Bit 7 6 5 4 3 2 1 0 x x 13 12 11 10 9 - * - ``V4L2_SLICED_VBI_525`` - - 0x1000 - - :cspan:`2` Set of services applicable to 525 line systems. - * - ``V4L2_SLICED_VBI_625`` - - 0x4401 - - :cspan:`2` Set of services applicable to 625 line systems. - -.. raw:: latex - - \normalsize - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The value in the ``type`` field is wrong. diff --git a/Documentation/media/uapi/v4l/vidioc-g-std.rst b/Documentation/media/uapi/v4l/vidioc-g-std.rst deleted file mode 100644 index e633e42e3910..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-std.rst +++ /dev/null @@ -1,81 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_STD: - -************************************************************************** -ioctl VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_SUBDEV_G_STD, VIDIOC_SUBDEV_S_STD -************************************************************************** - -Name -==== - -VIDIOC_G_STD - VIDIOC_S_STD - VIDIOC_SUBDEV_G_STD - VIDIOC_SUBDEV_S_STD - Query or select the video standard of the current input - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_STD, v4l2_std_id *argp ) - :name: VIDIOC_G_STD - -.. c:function:: int ioctl( int fd, VIDIOC_S_STD, const v4l2_std_id *argp ) - :name: VIDIOC_S_STD - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_STD, v4l2_std_id *argp ) - :name: VIDIOC_SUBDEV_G_STD - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_STD, const v4l2_std_id *argp ) - :name: VIDIOC_SUBDEV_S_STD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to :c:type:`v4l2_std_id`. - - -Description -=========== - -To query and select the current video standard applications use the -:ref:`VIDIOC_G_STD <VIDIOC_G_STD>` and :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` ioctls which take a pointer to a -:ref:`v4l2_std_id <v4l2-std-id>` type as argument. :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` -can return a single flag or a set of flags as in struct -:c:type:`v4l2_standard` field ``id``. The flags must be -unambiguous such that they appear in only one enumerated -struct :c:type:`v4l2_standard` structure. - -:ref:`VIDIOC_S_STD <VIDIOC_G_STD>` accepts one or more flags, being a write-only ioctl it -does not return the actual new standard as :ref:`VIDIOC_G_STD <VIDIOC_G_STD>` does. When -no flags are given or the current input does not support the requested -standard the driver returns an ``EINVAL`` error code. When the standard set -is ambiguous drivers may return ``EINVAL`` or choose any of the requested -standards. If the current input or output does not support standard -video timings (e.g. if :ref:`VIDIOC_ENUMINPUT` -does not set the ``V4L2_IN_CAP_STD`` flag), then ``ENODATA`` error code is -returned. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The :ref:`VIDIOC_S_STD <VIDIOC_G_STD>` parameter was unsuitable. - -ENODATA - Standard video timings are not supported for this input or output. diff --git a/Documentation/media/uapi/v4l/vidioc-g-tuner.rst b/Documentation/media/uapi/v4l/vidioc-g-tuner.rst deleted file mode 100644 index 82d23b8bd195..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-g-tuner.rst +++ /dev/null @@ -1,476 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_G_TUNER: - -************************************ -ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER -************************************ - -Name -==== - -VIDIOC_G_TUNER - VIDIOC_S_TUNER - Get or set tuner attributes - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_G_TUNER, struct v4l2_tuner *argp ) - :name: VIDIOC_G_TUNER - -.. c:function:: int ioctl( int fd, VIDIOC_S_TUNER, const struct v4l2_tuner *argp ) - :name: VIDIOC_S_TUNER - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_tuner`. - - -Description -=========== - -To query the attributes of a tuner applications initialize the ``index`` -field and zero out the ``reserved`` array of a struct -:c:type:`v4l2_tuner` and call the ``VIDIOC_G_TUNER`` ioctl -with a pointer to this structure. Drivers fill the rest of the structure -or return an ``EINVAL`` error code when the index is out of bounds. To -enumerate all tuners applications shall begin at index zero, -incrementing by one until the driver returns ``EINVAL``. - -Tuners have two writable properties, the audio mode and the radio -frequency. To change the audio mode, applications initialize the -``index``, ``audmode`` and ``reserved`` fields and call the -``VIDIOC_S_TUNER`` ioctl. This will *not* change the current tuner, -which is determined by the current video input. Drivers may choose a -different audio mode if the requested mode is invalid or unsupported. -Since this is a write-only ioctl, it does not return the actually -selected audio mode. - -:ref:`SDR <sdr>` specific tuner types are ``V4L2_TUNER_SDR`` and -``V4L2_TUNER_RF``. For SDR devices ``audmode`` field must be initialized -to zero. The term 'tuner' means SDR receiver in this context. - -To change the radio frequency the -:ref:`VIDIOC_S_FREQUENCY <VIDIOC_G_FREQUENCY>` ioctl is available. - - - .. tabularcolumns:: |p{1.3cm}|p{3.0cm}|p{6.6cm}|p{6.6cm}| - -.. c:type:: v4l2_tuner - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_tuner - :header-rows: 0 - :stub-columns: 0 - - * - __u32 - - ``index`` - - :cspan:`1` Identifies the tuner, set by the application. - * - __u8 - - ``name``\ [32] - - :cspan:`1` - - Name of the tuner, a NUL-terminated ASCII string. - - This information is intended for the user. - * - __u32 - - ``type`` - - :cspan:`1` Type of the tuner, see :c:type:`v4l2_tuner_type`. - * - __u32 - - ``capability`` - - :cspan:`1` - - Tuner capability flags, see :ref:`tuner-capability`. Audio flags - indicate the ability to decode audio subprograms. They will *not* - change, for example with the current video standard. - - When the structure refers to a radio tuner the - ``V4L2_TUNER_CAP_LANG1``, ``V4L2_TUNER_CAP_LANG2`` and - ``V4L2_TUNER_CAP_NORM`` flags can't be used. - - If multiple frequency bands are supported, then ``capability`` is - the union of all ``capability`` fields of each struct - :c:type:`v4l2_frequency_band`. - * - __u32 - - ``rangelow`` - - :cspan:`1` The lowest tunable frequency in units of 62.5 kHz, or - if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in units - of 62.5 Hz, or if the ``capability`` flag ``V4L2_TUNER_CAP_1HZ`` - is set, in units of 1 Hz. If multiple frequency bands are - supported, then ``rangelow`` is the lowest frequency of all the - frequency bands. - * - __u32 - - ``rangehigh`` - - :cspan:`1` The highest tunable frequency in units of 62.5 kHz, - or if the ``capability`` flag ``V4L2_TUNER_CAP_LOW`` is set, in - units of 62.5 Hz, or if the ``capability`` flag - ``V4L2_TUNER_CAP_1HZ`` is set, in units of 1 Hz. If multiple - frequency bands are supported, then ``rangehigh`` is the highest - frequency of all the frequency bands. - * - __u32 - - ``rxsubchans`` - - :cspan:`1` - - Some tuners or audio decoders can determine the received audio - subprograms by analyzing audio carriers, pilot tones or other - indicators. To pass this information drivers set flags defined in - :ref:`tuner-rxsubchans` in this field. For example: - * - - - - - ``V4L2_TUNER_SUB_MONO`` - - receiving mono audio - * - - - - - ``STEREO | SAP`` - - receiving stereo audio and a secondary audio program - * - - - - - ``MONO | STEREO`` - - receiving mono or stereo audio, the hardware cannot distinguish - * - - - - - ``LANG1 | LANG2`` - - receiving bilingual audio - * - - - - - ``MONO | STEREO | LANG1 | LANG2`` - - receiving mono, stereo or bilingual audio - * - - - - - :cspan:`1` - - When the ``V4L2_TUNER_CAP_STEREO``, ``_LANG1``, ``_LANG2`` or - ``_SAP`` flag is cleared in the ``capability`` field, the - corresponding ``V4L2_TUNER_SUB_`` flag must not be set here. - - This field is valid only if this is the tuner of the current video - input, or when the structure refers to a radio tuner. - * - __u32 - - ``audmode`` - - :cspan:`1` - - The selected audio mode, see :ref:`tuner-audmode` for valid - values. The audio mode does not affect audio subprogram detection, - and like a :ref:`control` it does not automatically - change unless the requested mode is invalid or unsupported. See - :ref:`tuner-matrix` for possible results when the selected and - received audio programs do not match. - - Currently this is the only field of struct - struct :c:type:`v4l2_tuner` applications can change. - * - __u32 - - ``signal`` - - :cspan:`1` The signal strength if known. - - Ranging from 0 to 65535. Higher values indicate a better signal. - * - __s32 - - ``afc`` - - :cspan:`1` Automatic frequency control. - - When the ``afc`` value is negative, the frequency is too - low, when positive too high. - * - __u32 - - ``reserved``\ [4] - - :cspan:`1` Reserved for future extensions. - - Drivers and applications must set the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. c:type:: v4l2_tuner_type - -.. flat-table:: enum v4l2_tuner_type - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 6 - - * - ``V4L2_TUNER_RADIO`` - - 1 - - Tuner supports radio - * - ``V4L2_TUNER_ANALOG_TV`` - - 2 - - Tuner supports analog TV - * - ``V4L2_TUNER_SDR`` - - 4 - - Tuner controls the A/D and/or D/A block of a - Software Digital Radio (SDR) - * - ``V4L2_TUNER_RF`` - - 5 - - Tuner controls the RF part of a Software Digital Radio (SDR) - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _tuner-capability: - -.. cssclass:: longtable - -.. flat-table:: Tuner and Modulator Capability Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_TUNER_CAP_LOW`` - - 0x0001 - - When set, tuning frequencies are expressed in units of 62.5 Hz - instead of 62.5 kHz. - * - ``V4L2_TUNER_CAP_NORM`` - - 0x0002 - - This is a multi-standard tuner; the video standard can or must be - switched. (B/G PAL tuners for example are typically not considered - multi-standard because the video standard is automatically - determined from the frequency band.) The set of supported video - standards is available from the struct - :c:type:`v4l2_input` pointing to this tuner, see the - description of ioctl :ref:`VIDIOC_ENUMINPUT` - for details. Only ``V4L2_TUNER_ANALOG_TV`` tuners can have this - capability. - * - ``V4L2_TUNER_CAP_HWSEEK_BOUNDED`` - - 0x0004 - - If set, then this tuner supports the hardware seek functionality - where the seek stops when it reaches the end of the frequency - range. - * - ``V4L2_TUNER_CAP_HWSEEK_WRAP`` - - 0x0008 - - If set, then this tuner supports the hardware seek functionality - where the seek wraps around when it reaches the end of the - frequency range. - * - ``V4L2_TUNER_CAP_STEREO`` - - 0x0010 - - Stereo audio reception is supported. - * - ``V4L2_TUNER_CAP_LANG1`` - - 0x0040 - - Reception of the primary language of a bilingual audio program is - supported. Bilingual audio is a feature of two-channel systems, - transmitting the primary language monaural on the main audio - carrier and a secondary language monaural on a second carrier. - Only ``V4L2_TUNER_ANALOG_TV`` tuners can have this capability. - * - ``V4L2_TUNER_CAP_LANG2`` - - 0x0020 - - Reception of the secondary language of a bilingual audio program - is supported. Only ``V4L2_TUNER_ANALOG_TV`` tuners can have this - capability. - * - ``V4L2_TUNER_CAP_SAP`` - - 0x0020 - - Reception of a secondary audio program is supported. This is a - feature of the BTSC system which accompanies the NTSC video - standard. Two audio carriers are available for mono or stereo - transmissions of a primary language, and an independent third - carrier for a monaural secondary language. Only - ``V4L2_TUNER_ANALOG_TV`` tuners can have this capability. - - .. note:: - - The ``V4L2_TUNER_CAP_LANG2`` and ``V4L2_TUNER_CAP_SAP`` - flags are synonyms. ``V4L2_TUNER_CAP_SAP`` applies when the tuner - supports the ``V4L2_STD_NTSC_M`` video standard. - * - ``V4L2_TUNER_CAP_RDS`` - - 0x0080 - - RDS capture is supported. This capability is only valid for radio - tuners. - * - ``V4L2_TUNER_CAP_RDS_BLOCK_IO`` - - 0x0100 - - The RDS data is passed as unparsed RDS blocks. - * - ``V4L2_TUNER_CAP_RDS_CONTROLS`` - - 0x0200 - - The RDS data is parsed by the hardware and set via controls. - * - ``V4L2_TUNER_CAP_FREQ_BANDS`` - - 0x0400 - - The :ref:`VIDIOC_ENUM_FREQ_BANDS` - ioctl can be used to enumerate the available frequency bands. - * - ``V4L2_TUNER_CAP_HWSEEK_PROG_LIM`` - - 0x0800 - - The range to search when using the hardware seek functionality is - programmable, see - :ref:`VIDIOC_S_HW_FREQ_SEEK` for - details. - * - ``V4L2_TUNER_CAP_1HZ`` - - 0x1000 - - When set, tuning frequencies are expressed in units of 1 Hz - instead of 62.5 kHz. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _tuner-rxsubchans: - -.. flat-table:: Tuner Audio Reception Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_TUNER_SUB_MONO`` - - 0x0001 - - The tuner receives a mono audio signal. - * - ``V4L2_TUNER_SUB_STEREO`` - - 0x0002 - - The tuner receives a stereo audio signal. - * - ``V4L2_TUNER_SUB_LANG1`` - - 0x0008 - - The tuner receives the primary language of a bilingual audio - signal. Drivers must clear this flag when the current video - standard is ``V4L2_STD_NTSC_M``. - * - ``V4L2_TUNER_SUB_LANG2`` - - 0x0004 - - The tuner receives the secondary language of a bilingual audio - signal (or a second audio program). - * - ``V4L2_TUNER_SUB_SAP`` - - 0x0004 - - The tuner receives a Second Audio Program. - - .. note:: - - The ``V4L2_TUNER_SUB_LANG2`` and ``V4L2_TUNER_SUB_SAP`` - flags are synonyms. The ``V4L2_TUNER_SUB_SAP`` flag applies - when the current video standard is ``V4L2_STD_NTSC_M``. - * - ``V4L2_TUNER_SUB_RDS`` - - 0x0010 - - The tuner receives an RDS channel. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _tuner-audmode: - -.. flat-table:: Tuner Audio Modes - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_TUNER_MODE_MONO`` - - 0 - - Play mono audio. When the tuner receives a stereo signal this a - down-mix of the left and right channel. When the tuner receives a - bilingual or SAP signal this mode selects the primary language. - * - ``V4L2_TUNER_MODE_STEREO`` - - 1 - - Play stereo audio. When the tuner receives bilingual audio it may - play different languages on the left and right channel or the - primary language is played on both channels. - - Playing different languages in this mode is deprecated. New - drivers should do this only in ``MODE_LANG1_LANG2``. - - When the tuner receives no stereo signal or does not support - stereo reception the driver shall fall back to ``MODE_MONO``. - * - ``V4L2_TUNER_MODE_LANG1`` - - 3 - - Play the primary language, mono or stereo. Only - ``V4L2_TUNER_ANALOG_TV`` tuners support this mode. - * - ``V4L2_TUNER_MODE_LANG2`` - - 2 - - Play the secondary language, mono. When the tuner receives no - bilingual audio or SAP, or their reception is not supported the - driver shall fall back to mono or stereo mode. Only - ``V4L2_TUNER_ANALOG_TV`` tuners support this mode. - * - ``V4L2_TUNER_MODE_SAP`` - - 2 - - Play the Second Audio Program. When the tuner receives no - bilingual audio or SAP, or their reception is not supported the - driver shall fall back to mono or stereo mode. Only - ``V4L2_TUNER_ANALOG_TV`` tuners support this mode. - - .. note:: The ``V4L2_TUNER_MODE_LANG2`` and ``V4L2_TUNER_MODE_SAP`` - are synonyms. - * - ``V4L2_TUNER_MODE_LANG1_LANG2`` - - 4 - - Play the primary language on the left channel, the secondary - language on the right channel. When the tuner receives no - bilingual audio or SAP, it shall fall back to ``MODE_LANG1`` or - ``MODE_MONO``. Only ``V4L2_TUNER_ANALOG_TV`` tuners support this - mode. - -.. raw:: latex - - \scriptsize - -.. tabularcolumns:: |p{1.5cm}|p{1.5cm}|p{2.9cm}|p{2.9cm}|p{2.9cm}|p{2.9cm}| - -.. _tuner-matrix: - -.. flat-table:: Tuner Audio Matrix - :header-rows: 2 - :stub-columns: 0 - :widths: 7 7 14 14 14 14 - - * - - - :cspan:`4` Selected ``V4L2_TUNER_MODE_`` - * - Received ``V4L2_TUNER_SUB_`` - - ``MONO`` - - ``STEREO`` - - ``LANG1`` - - ``LANG2 = SAP`` - - ``LANG1_LANG2``\ [#f1]_ - * - ``MONO`` - - Mono - - Mono/Mono - - Mono - - Mono - - Mono/Mono - * - ``MONO | SAP`` - - Mono - - Mono/Mono - - Mono - - SAP - - Mono/SAP (preferred) or Mono/Mono - * - ``STEREO`` - - L+R - - L/R - - Stereo L/R (preferred) or Mono L+R - - Stereo L/R (preferred) or Mono L+R - - L/R (preferred) or L+R/L+R - * - ``STEREO | SAP`` - - L+R - - L/R - - Stereo L/R (preferred) or Mono L+R - - SAP - - L+R/SAP (preferred) or L/R or L+R/L+R - * - ``LANG1 | LANG2`` - - Language 1 - - Lang1/Lang2 (deprecated\ [#f2]_) or Lang1/Lang1 - - Language 1 - - Language 2 - - Lang1/Lang2 (preferred) or Lang1/Lang1 - -.. raw:: latex - - \normalsize - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :c:type:`v4l2_tuner` ``index`` is out of - bounds. - -.. [#f1] - This mode has been added in Linux 2.6.17 and may not be supported by - older drivers. - -.. [#f2] - Playback of both languages in ``MODE_STEREO`` is deprecated. In the - future drivers should produce only the primary language in this mode. - Applications should request ``MODE_LANG1_LANG2`` to record both - languages or a stereo signal. diff --git a/Documentation/media/uapi/v4l/vidioc-log-status.rst b/Documentation/media/uapi/v4l/vidioc-log-status.rst deleted file mode 100644 index 16bb5509ad66..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-log-status.rst +++ /dev/null @@ -1,56 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_LOG_STATUS: - -*********************** -ioctl VIDIOC_LOG_STATUS -*********************** - -Name -==== - -VIDIOC_LOG_STATUS - Log driver status information - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_LOG_STATUS) - :name: VIDIOC_LOG_STATUS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - - -Description -=========== - -As the video/audio devices become more complicated it becomes harder to -debug problems. When this ioctl is called the driver will output the -current device status to the kernel log. This is particular useful when -dealing with problems like no sound, no video and incorrectly tuned -channels. Also many modern devices autodetect video and audio standards -and this ioctl will report what the device thinks what the standard is. -Mismatches may give an indication where the problem is. - -This ioctl is optional and not all drivers support it. It was introduced -in Linux 2.6.15. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-overlay.rst b/Documentation/media/uapi/v4l/vidioc-overlay.rst deleted file mode 100644 index fc5a86e8c1f2..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-overlay.rst +++ /dev/null @@ -1,61 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_OVERLAY: - -******************** -ioctl VIDIOC_OVERLAY -******************** - -Name -==== - -VIDIOC_OVERLAY - Start or stop video overlay - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_OVERLAY, const int *argp ) - :name: VIDIOC_OVERLAY - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to an integer. - - -Description -=========== - -This ioctl is part of the :ref:`video overlay <overlay>` I/O method. -Applications call :ref:`VIDIOC_OVERLAY` to start or stop the overlay. It -takes a pointer to an integer which must be set to zero by the -application to stop overlay, to one to start. - -Drivers do not support :ref:`VIDIOC_STREAMON` or -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` with -``V4L2_BUF_TYPE_VIDEO_OVERLAY``. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The overlay parameters have not been set up. See :ref:`overlay` - for the necessary steps. diff --git a/Documentation/media/uapi/v4l/vidioc-prepare-buf.rst b/Documentation/media/uapi/v4l/vidioc-prepare-buf.rst deleted file mode 100644 index 7c6b5f4e1011..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-prepare-buf.rst +++ /dev/null @@ -1,65 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_PREPARE_BUF: - -************************ -ioctl VIDIOC_PREPARE_BUF -************************ - -Name -==== - -VIDIOC_PREPARE_BUF - Prepare a buffer for I/O - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_PREPARE_BUF, struct v4l2_buffer *argp ) - :name: VIDIOC_PREPARE_BUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_buffer`. - - -Description -=========== - -Applications can optionally call the :ref:`VIDIOC_PREPARE_BUF` ioctl to -pass ownership of the buffer to the driver before actually enqueuing it, -using the :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl, and to prepare it for future I/O. Such -preparations may include cache invalidation or cleaning. Performing them -in advance saves time during the actual I/O. - -The struct :c:type:`v4l2_buffer` structure is specified in -:ref:`buffer`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - File I/O is in progress. - -EINVAL - The buffer ``type`` is not supported, or the ``index`` is out of - bounds, or no buffers have been allocated yet, or the ``userptr`` or - ``length`` are invalid. diff --git a/Documentation/media/uapi/v4l/vidioc-qbuf.rst b/Documentation/media/uapi/v4l/vidioc-qbuf.rst deleted file mode 100644 index 407302d80684..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-qbuf.rst +++ /dev/null @@ -1,205 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_QBUF: - -******************************* -ioctl VIDIOC_QBUF, VIDIOC_DQBUF -******************************* - -Name -==== - -VIDIOC_QBUF - VIDIOC_DQBUF - Exchange a buffer with the driver - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_QBUF, struct v4l2_buffer *argp ) - :name: VIDIOC_QBUF - -.. c:function:: int ioctl( int fd, VIDIOC_DQBUF, struct v4l2_buffer *argp ) - :name: VIDIOC_DQBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_buffer`. - - -Description -=========== - -Applications call the ``VIDIOC_QBUF`` ioctl to enqueue an empty -(capturing) or filled (output) buffer in the driver's incoming queue. -The semantics depend on the selected I/O method. - -To enqueue a buffer applications set the ``type`` field of a struct -:c:type:`v4l2_buffer` to the same buffer type as was -previously used with struct :c:type:`v4l2_format` ``type`` -and struct :c:type:`v4l2_requestbuffers` ``type``. -Applications must also set the ``index`` field. Valid index numbers -range from zero to the number of buffers allocated with -:ref:`VIDIOC_REQBUFS` (struct -:c:type:`v4l2_requestbuffers` ``count``) minus -one. The contents of the struct :c:type:`v4l2_buffer` returned -by a :ref:`VIDIOC_QUERYBUF` ioctl will do as well. -When the buffer is intended for output (``type`` is -``V4L2_BUF_TYPE_VIDEO_OUTPUT``, ``V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE``, -or ``V4L2_BUF_TYPE_VBI_OUTPUT``) applications must also initialize the -``bytesused``, ``field`` and ``timestamp`` fields, see :ref:`buffer` -for details. Applications must also set ``flags`` to 0. The -``reserved2`` and ``reserved`` fields must be set to 0. When using the -:ref:`multi-planar API <planar-apis>`, the ``m.planes`` field must -contain a userspace pointer to a filled-in array of struct -:c:type:`v4l2_plane` and the ``length`` field must be set -to the number of elements in that array. - -To enqueue a :ref:`memory mapped <mmap>` buffer applications set the -``memory`` field to ``V4L2_MEMORY_MMAP``. When ``VIDIOC_QBUF`` is called -with a pointer to this structure the driver sets the -``V4L2_BUF_FLAG_MAPPED`` and ``V4L2_BUF_FLAG_QUEUED`` flags and clears -the ``V4L2_BUF_FLAG_DONE`` flag in the ``flags`` field, or it returns an -``EINVAL`` error code. - -To enqueue a :ref:`user pointer <userp>` buffer applications set the -``memory`` field to ``V4L2_MEMORY_USERPTR``, the ``m.userptr`` field to -the address of the buffer and ``length`` to its size. When the -multi-planar API is used, ``m.userptr`` and ``length`` members of the -passed array of struct :c:type:`v4l2_plane` have to be used -instead. When ``VIDIOC_QBUF`` is called with a pointer to this structure -the driver sets the ``V4L2_BUF_FLAG_QUEUED`` flag and clears the -``V4L2_BUF_FLAG_MAPPED`` and ``V4L2_BUF_FLAG_DONE`` flags in the -``flags`` field, or it returns an error code. This ioctl locks the -memory pages of the buffer in physical memory, they cannot be swapped -out to disk. Buffers remain locked until dequeued, until the -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or -:ref:`VIDIOC_REQBUFS` ioctl is called, or until the -device is closed. - -To enqueue a :ref:`DMABUF <dmabuf>` buffer applications set the -``memory`` field to ``V4L2_MEMORY_DMABUF`` and the ``m.fd`` field to a -file descriptor associated with a DMABUF buffer. When the multi-planar -API is used the ``m.fd`` fields of the passed array of struct -:c:type:`v4l2_plane` have to be used instead. When -``VIDIOC_QBUF`` is called with a pointer to this structure the driver -sets the ``V4L2_BUF_FLAG_QUEUED`` flag and clears the -``V4L2_BUF_FLAG_MAPPED`` and ``V4L2_BUF_FLAG_DONE`` flags in the -``flags`` field, or it returns an error code. This ioctl locks the -buffer. Locking a buffer means passing it to a driver for a hardware -access (usually DMA). If an application accesses (reads/writes) a locked -buffer then the result is undefined. Buffers remain locked until -dequeued, until the :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or -:ref:`VIDIOC_REQBUFS` ioctl is called, or until the -device is closed. - -The ``request_fd`` field can be used with the ``VIDIOC_QBUF`` ioctl to specify -the file descriptor of a :ref:`request <media-request-api>`, if requests are -in use. Setting it means that the buffer will not be passed to the driver -until the request itself is queued. Also, the driver will apply any -settings associated with the request for this buffer. This field will -be ignored unless the ``V4L2_BUF_FLAG_REQUEST_FD`` flag is set. -If the device does not support requests, then ``EBADR`` will be returned. -If requests are supported but an invalid request file descriptor is given, -then ``EINVAL`` will be returned. - -.. caution:: - It is not allowed to mix queuing requests with queuing buffers directly. - ``EBUSY`` will be returned if the first buffer was queued directly and - then the application tries to queue a request, or vice versa. After - closing the file descriptor, calling - :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or calling :ref:`VIDIOC_REQBUFS` - the check for this will be reset. - - For :ref:`memory-to-memory devices <mem2mem>` you can specify the - ``request_fd`` only for output buffers, not for capture buffers. Attempting - to specify this for a capture buffer will result in an ``EBADR`` error. - -Applications call the ``VIDIOC_DQBUF`` ioctl to dequeue a filled -(capturing) or displayed (output) buffer from the driver's outgoing -queue. They just set the ``type``, ``memory`` and ``reserved`` fields of -a struct :c:type:`v4l2_buffer` as above, when -``VIDIOC_DQBUF`` is called with a pointer to this structure the driver -fills the remaining fields or returns an error code. The driver may also -set ``V4L2_BUF_FLAG_ERROR`` in the ``flags`` field. It indicates a -non-critical (recoverable) streaming error. In such case the application -may continue as normal, but should be aware that data in the dequeued -buffer might be corrupted. When using the multi-planar API, the planes -array must be passed in as well. - -If the application sets the ``memory`` field to ``V4L2_MEMORY_DMABUF`` to -dequeue a :ref:`DMABUF <dmabuf>` buffer, the driver fills the ``m.fd`` field -with a file descriptor numerically the same as the one given to ``VIDIOC_QBUF`` -when the buffer was enqueued. No new file descriptor is created at dequeue time -and the value is only for the application convenience. When the multi-planar -API is used the ``m.fd`` fields of the passed array of struct -:c:type:`v4l2_plane` are filled instead. - -By default ``VIDIOC_DQBUF`` blocks when no buffer is in the outgoing -queue. When the ``O_NONBLOCK`` flag was given to the -:ref:`open() <func-open>` function, ``VIDIOC_DQBUF`` returns -immediately with an ``EAGAIN`` error code when no buffer is available. - -The struct :c:type:`v4l2_buffer` structure is specified in -:ref:`buffer`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EAGAIN - Non-blocking I/O has been selected using ``O_NONBLOCK`` and no - buffer was in the outgoing queue. - -EINVAL - The buffer ``type`` is not supported, or the ``index`` is out of - bounds, or no buffers have been allocated yet, or the ``userptr`` or - ``length`` are invalid, or the ``V4L2_BUF_FLAG_REQUEST_FD`` flag was - set but the the given ``request_fd`` was invalid, or ``m.fd`` was - an invalid DMABUF file descriptor. - -EIO - ``VIDIOC_DQBUF`` failed due to an internal error. Can also indicate - temporary problems like signal loss. - - .. note:: - - The driver might dequeue an (empty) buffer despite returning - an error, or even stop capturing. Reusing such buffer may be unsafe - though and its details (e.g. ``index``) may not be returned either. - It is recommended that drivers indicate recoverable errors by setting - the ``V4L2_BUF_FLAG_ERROR`` and returning 0 instead. In that case the - application should be able to safely reuse the buffer and continue - streaming. - -EPIPE - ``VIDIOC_DQBUF`` returns this on an empty capture queue for mem2mem - codecs if a buffer with the ``V4L2_BUF_FLAG_LAST`` was already - dequeued and no new buffers are expected to become available. - -EBADR - The ``V4L2_BUF_FLAG_REQUEST_FD`` flag was set but the device does not - support requests for the given buffer type, or - the ``V4L2_BUF_FLAG_REQUEST_FD`` flag was not set but the device requires - that the buffer is part of a request. - -EBUSY - The first buffer was queued via a request, but the application now tries - to queue it directly, or vice versa (it is not permitted to mix the two - APIs). diff --git a/Documentation/media/uapi/v4l/vidioc-query-dv-timings.rst b/Documentation/media/uapi/v4l/vidioc-query-dv-timings.rst deleted file mode 100644 index e9b055395382..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-query-dv-timings.rst +++ /dev/null @@ -1,94 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_QUERY_DV_TIMINGS: - -***************************** -ioctl VIDIOC_QUERY_DV_TIMINGS -***************************** - -Name -==== - -VIDIOC_QUERY_DV_TIMINGS - VIDIOC_SUBDEV_QUERY_DV_TIMINGS - Sense the DV preset received by the current input - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_QUERY_DV_TIMINGS, struct v4l2_dv_timings *argp ) - :name: VIDIOC_QUERY_DV_TIMINGS - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_QUERY_DV_TIMINGS, struct v4l2_dv_timings *argp ) - :name: VIDIOC_SUBDEV_QUERY_DV_TIMINGS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_dv_timings`. - - -Description -=========== - -The hardware may be able to detect the current DV timings automatically, -similar to sensing the video standard. To do so, applications call -:ref:`VIDIOC_QUERY_DV_TIMINGS` with a pointer to a struct -:c:type:`v4l2_dv_timings`. Once the hardware detects -the timings, it will fill in the timings structure. - -.. note:: - - Drivers shall *not* switch timings automatically if new - timings are detected. Instead, drivers should send the - ``V4L2_EVENT_SOURCE_CHANGE`` event (if they support this) and expect - that userspace will take action by calling :ref:`VIDIOC_QUERY_DV_TIMINGS`. - The reason is that new timings usually mean different buffer sizes as - well, and you cannot change buffer sizes on the fly. In general, - applications that receive the Source Change event will have to call - :ref:`VIDIOC_QUERY_DV_TIMINGS`, and if the detected timings are valid they - will have to stop streaming, set the new timings, allocate new buffers - and start streaming again. - -If the timings could not be detected because there was no signal, then -ENOLINK is returned. If a signal was detected, but it was unstable and -the receiver could not lock to the signal, then ``ENOLCK`` is returned. If -the receiver could lock to the signal, but the format is unsupported -(e.g. because the pixelclock is out of range of the hardware -capabilities), then the driver fills in whatever timings it could find -and returns ``ERANGE``. In that case the application can call -:ref:`VIDIOC_DV_TIMINGS_CAP` to compare the -found timings with the hardware's capabilities in order to give more -precise feedback to the user. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -ENODATA - Digital video timings are not supported for this input or output. - -ENOLINK - No timings could be detected because no signal was found. - -ENOLCK - The signal was unstable and the hardware could not lock on to it. - -ERANGE - Timings were found, but they are out of range of the hardware - capabilities. diff --git a/Documentation/media/uapi/v4l/vidioc-querybuf.rst b/Documentation/media/uapi/v4l/vidioc-querybuf.rst deleted file mode 100644 index 7da60b24e8b6..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-querybuf.rst +++ /dev/null @@ -1,87 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_QUERYBUF: - -********************* -ioctl VIDIOC_QUERYBUF -********************* - -Name -==== - -VIDIOC_QUERYBUF - Query the status of a buffer - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_QUERYBUF, struct v4l2_buffer *argp ) - :name: VIDIOC_QUERYBUF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_buffer`. - - -Description -=========== - -This ioctl is part of the :ref:`streaming <mmap>` I/O method. It can -be used to query the status of a buffer at any time after buffers have -been allocated with the :ref:`VIDIOC_REQBUFS` ioctl. - -Applications set the ``type`` field of a struct -:c:type:`v4l2_buffer` to the same buffer type as was -previously used with struct :c:type:`v4l2_format` ``type`` -and struct :c:type:`v4l2_requestbuffers` ``type``, -and the ``index`` field. Valid index numbers range from zero to the -number of buffers allocated with -:ref:`VIDIOC_REQBUFS` (struct -:c:type:`v4l2_requestbuffers` ``count``) minus -one. The ``reserved`` and ``reserved2`` fields must be set to 0. When -using the :ref:`multi-planar API <planar-apis>`, the ``m.planes`` -field must contain a userspace pointer to an array of struct -:c:type:`v4l2_plane` and the ``length`` field has to be set -to the number of elements in that array. After calling -:ref:`VIDIOC_QUERYBUF` with a pointer to this structure drivers return an -error code or fill the rest of the structure. - -In the ``flags`` field the ``V4L2_BUF_FLAG_MAPPED``, -``V4L2_BUF_FLAG_PREPARED``, ``V4L2_BUF_FLAG_QUEUED`` and -``V4L2_BUF_FLAG_DONE`` flags will be valid. The ``memory`` field will be -set to the current I/O method. For the single-planar API, the -``m.offset`` contains the offset of the buffer from the start of the -device memory, the ``length`` field its size. For the multi-planar API, -fields ``m.mem_offset`` and ``length`` in the ``m.planes`` array -elements will be used instead and the ``length`` field of struct -:c:type:`v4l2_buffer` is set to the number of filled-in -array elements. The driver may or may not set the remaining fields and -flags, they are meaningless in this context. - -The struct :c:type:`v4l2_buffer` structure is specified in -:ref:`buffer`. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The buffer ``type`` is not supported, or the ``index`` is out of - bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-querycap.rst b/Documentation/media/uapi/v4l/vidioc-querycap.rst deleted file mode 100644 index 5f9930195d62..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-querycap.rst +++ /dev/null @@ -1,284 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_QUERYCAP: - -********************* -ioctl VIDIOC_QUERYCAP -********************* - -Name -==== - -VIDIOC_QUERYCAP - Query device capabilities - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_QUERYCAP, struct v4l2_capability *argp ) - :name: VIDIOC_QUERYCAP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_capability`. - - -Description -=========== - -All V4L2 devices support the ``VIDIOC_QUERYCAP`` ioctl. It is used to -identify kernel devices compatible with this specification and to obtain -information about driver and hardware capabilities. The ioctl takes a -pointer to a struct :c:type:`v4l2_capability` which is -filled by the driver. When the driver is not compatible with this -specification the ioctl returns an ``EINVAL`` error code. - - -.. tabularcolumns:: |p{1.5cm}|p{2.5cm}|p{13cm}| - -.. c:type:: v4l2_capability - -.. flat-table:: struct v4l2_capability - :header-rows: 0 - :stub-columns: 0 - :widths: 3 4 20 - - * - __u8 - - ``driver``\ [16] - - Name of the driver, a unique NUL-terminated ASCII string. For - example: "bttv". Driver specific applications can use this - information to verify the driver identity. It is also useful to - work around known bugs, or to identify drivers in error reports. - - Storing strings in fixed sized arrays is bad practice but - unavoidable here. Drivers and applications should take precautions - to never read or write beyond the end of the array and to make - sure the strings are properly NUL-terminated. - * - __u8 - - ``card``\ [32] - - Name of the device, a NUL-terminated UTF-8 string. For example: - "Yoyodyne TV/FM". One driver may support different brands or - models of video hardware. This information is intended for users, - for example in a menu of available devices. Since multiple TV - cards of the same brand may be installed which are supported by - the same driver, this name should be combined with the character - device file name (e. g. ``/dev/video2``) or the ``bus_info`` - string to avoid ambiguities. - * - __u8 - - ``bus_info``\ [32] - - Location of the device in the system, a NUL-terminated ASCII - string. For example: "PCI:0000:05:06.0". This information is - intended for users, to distinguish multiple identical devices. If - no such information is available the field must simply count the - devices controlled by the driver ("platform:vivi-000"). The - bus_info must start with "PCI:" for PCI boards, "PCIe:" for PCI - Express boards, "usb-" for USB devices, "I2C:" for i2c devices, - "ISA:" for ISA devices, "parport" for parallel port devices and - "platform:" for platform devices. - * - __u32 - - ``version`` - - Version number of the driver. - - Starting with kernel 3.1, the version reported is provided by the - V4L2 subsystem following the kernel numbering scheme. However, it - may not always return the same version as the kernel if, for - example, a stable or distribution-modified kernel uses the V4L2 - stack from a newer kernel. - - The version number is formatted using the ``KERNEL_VERSION()`` - macro. For example if the media stack corresponds to the V4L2 - version shipped with Kernel 4.14, it would be equivalent to: - * - :cspan:`2` - - ``#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))`` - - ``__u32 version = KERNEL_VERSION(4, 14, 0);`` - - ``printf ("Version: %u.%u.%u\\n",`` - - ``(version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);`` - * - __u32 - - ``capabilities`` - - Available capabilities of the physical device as a whole, see - :ref:`device-capabilities`. The same physical device can export - multiple devices in /dev (e.g. /dev/videoX, /dev/vbiY and - /dev/radioZ). The ``capabilities`` field should contain a union of - all capabilities available around the several V4L2 devices - exported to userspace. For all those devices the ``capabilities`` - field returns the same set of capabilities. This allows - applications to open just one of the devices (typically the video - device) and discover whether video, vbi and/or radio are also - supported. - * - __u32 - - ``device_caps`` - - Device capabilities of the opened device, see - :ref:`device-capabilities`. Should contain the available - capabilities of that specific device node. So, for example, - ``device_caps`` of a radio device will only contain radio related - capabilities and no video or vbi capabilities. This field is only - set if the ``capabilities`` field contains the - ``V4L2_CAP_DEVICE_CAPS`` capability. Only the ``capabilities`` - field can have the ``V4L2_CAP_DEVICE_CAPS`` capability, - ``device_caps`` will never set ``V4L2_CAP_DEVICE_CAPS``. - * - __u32 - - ``reserved``\ [3] - - Reserved for future extensions. Drivers must set this array to - zero. - - - -.. tabularcolumns:: |p{6.1cm}|p{2.2cm}|p{8.7cm}| - -.. _device-capabilities: - -.. cssclass:: longtable - -.. flat-table:: Device Capabilities Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_CAP_VIDEO_CAPTURE`` - - 0x00000001 - - The device supports the single-planar API through the - :ref:`Video Capture <capture>` interface. - * - ``V4L2_CAP_VIDEO_CAPTURE_MPLANE`` - - 0x00001000 - - The device supports the :ref:`multi-planar API <planar-apis>` - through the :ref:`Video Capture <capture>` interface. - * - ``V4L2_CAP_VIDEO_OUTPUT`` - - 0x00000002 - - The device supports the single-planar API through the - :ref:`Video Output <output>` interface. - * - ``V4L2_CAP_VIDEO_OUTPUT_MPLANE`` - - 0x00002000 - - The device supports the :ref:`multi-planar API <planar-apis>` - through the :ref:`Video Output <output>` interface. - * - ``V4L2_CAP_VIDEO_M2M`` - - 0x00004000 - - The device supports the single-planar API through the Video - Memory-To-Memory interface. - * - ``V4L2_CAP_VIDEO_M2M_MPLANE`` - - 0x00008000 - - The device supports the :ref:`multi-planar API <planar-apis>` - through the Video Memory-To-Memory interface. - * - ``V4L2_CAP_VIDEO_OVERLAY`` - - 0x00000004 - - The device supports the :ref:`Video Overlay <overlay>` - interface. A video overlay device typically stores captured images - directly in the video memory of a graphics card, with hardware - clipping and scaling. - * - ``V4L2_CAP_VBI_CAPTURE`` - - 0x00000010 - - The device supports the :ref:`Raw VBI Capture <raw-vbi>` - interface, providing Teletext and Closed Caption data. - * - ``V4L2_CAP_VBI_OUTPUT`` - - 0x00000020 - - The device supports the :ref:`Raw VBI Output <raw-vbi>` - interface. - * - ``V4L2_CAP_SLICED_VBI_CAPTURE`` - - 0x00000040 - - The device supports the :ref:`Sliced VBI Capture <sliced>` - interface. - * - ``V4L2_CAP_SLICED_VBI_OUTPUT`` - - 0x00000080 - - The device supports the :ref:`Sliced VBI Output <sliced>` - interface. - * - ``V4L2_CAP_RDS_CAPTURE`` - - 0x00000100 - - The device supports the :ref:`RDS <rds>` capture interface. - * - ``V4L2_CAP_VIDEO_OUTPUT_OVERLAY`` - - 0x00000200 - - The device supports the :ref:`Video Output Overlay <osd>` (OSD) - interface. Unlike the *Video Overlay* interface, this is a - secondary function of video output devices and overlays an image - onto an outgoing video signal. When the driver sets this flag, it - must clear the ``V4L2_CAP_VIDEO_OVERLAY`` flag and vice - versa. [#f1]_ - * - ``V4L2_CAP_HW_FREQ_SEEK`` - - 0x00000400 - - The device supports the - :ref:`VIDIOC_S_HW_FREQ_SEEK` ioctl - for hardware frequency seeking. - * - ``V4L2_CAP_RDS_OUTPUT`` - - 0x00000800 - - The device supports the :ref:`RDS <rds>` output interface. - * - ``V4L2_CAP_TUNER`` - - 0x00010000 - - The device has some sort of tuner to receive RF-modulated video - signals. For more information about tuner programming see - :ref:`tuner`. - * - ``V4L2_CAP_AUDIO`` - - 0x00020000 - - The device has audio inputs or outputs. It may or may not support - audio recording or playback, in PCM or compressed formats. PCM - audio support must be implemented as ALSA or OSS interface. For - more information on audio inputs and outputs see :ref:`audio`. - * - ``V4L2_CAP_RADIO`` - - 0x00040000 - - This is a radio receiver. - * - ``V4L2_CAP_MODULATOR`` - - 0x00080000 - - The device has some sort of modulator to emit RF-modulated - video/audio signals. For more information about modulator - programming see :ref:`tuner`. - * - ``V4L2_CAP_SDR_CAPTURE`` - - 0x00100000 - - The device supports the :ref:`SDR Capture <sdr>` interface. - * - ``V4L2_CAP_EXT_PIX_FORMAT`` - - 0x00200000 - - The device supports the struct - :c:type:`v4l2_pix_format` extended fields. - * - ``V4L2_CAP_SDR_OUTPUT`` - - 0x00400000 - - The device supports the :ref:`SDR Output <sdr>` interface. - * - ``V4L2_CAP_META_CAPTURE`` - - 0x00800000 - - The device supports the :ref:`metadata` capture interface. - * - ``V4L2_CAP_READWRITE`` - - 0x01000000 - - The device supports the :ref:`read() <rw>` and/or - :ref:`write() <rw>` I/O methods. - * - ``V4L2_CAP_ASYNCIO`` - - 0x02000000 - - The device supports the :ref:`asynchronous <async>` I/O methods. - * - ``V4L2_CAP_STREAMING`` - - 0x04000000 - - The device supports the :ref:`streaming <mmap>` I/O method. - * - ``V4L2_CAP_META_OUTPUT`` - - 0x08000000 - - The device supports the :ref:`metadata` output interface. - * - ``V4L2_CAP_TOUCH`` - - 0x10000000 - - This is a touch device. - * - ``V4L2_CAP_DEVICE_CAPS`` - - 0x80000000 - - The driver fills the ``device_caps`` field. This capability can - only appear in the ``capabilities`` field and never in the - ``device_caps`` field. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -.. [#f1] - The struct :c:type:`v4l2_framebuffer` lacks an - enum :c:type:`v4l2_buf_type` field, therefore the - type of overlay is implied by the driver capabilities. diff --git a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst deleted file mode 100644 index 8971f4cfb16e..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst +++ /dev/null @@ -1,616 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_QUERYCTRL: - -******************************************************************* -ioctls VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL and VIDIOC_QUERYMENU -******************************************************************* - -Name -==== - -VIDIOC_QUERYCTRL - VIDIOC_QUERY_EXT_CTRL - VIDIOC_QUERYMENU - Enumerate controls and menu control items - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, int VIDIOC_QUERYCTRL, struct v4l2_queryctrl *argp ) - :name: VIDIOC_QUERYCTRL - -.. c:function:: int ioctl( int fd, VIDIOC_QUERY_EXT_CTRL, struct v4l2_query_ext_ctrl *argp ) - :name: VIDIOC_QUERY_EXT_CTRL - -.. c:function:: int ioctl( int fd, VIDIOC_QUERYMENU, struct v4l2_querymenu *argp ) - :name: VIDIOC_QUERYMENU - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_queryctrl`, :c:type:`v4l2_query_ext_ctrl` - or :c:type:`v4l2_querymenu` (depending on the ioctl). - - -Description -=========== - -To query the attributes of a control applications set the ``id`` field -of a struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` and call the -``VIDIOC_QUERYCTRL`` ioctl with a pointer to this structure. The driver -fills the rest of the structure or returns an ``EINVAL`` error code when the -``id`` is invalid. - -It is possible to enumerate controls by calling ``VIDIOC_QUERYCTRL`` -with successive ``id`` values starting from ``V4L2_CID_BASE`` up to and -exclusive ``V4L2_CID_LASTP1``. Drivers may return ``EINVAL`` if a control in -this range is not supported. Further applications can enumerate private -controls, which are not defined in this specification, by starting at -``V4L2_CID_PRIVATE_BASE`` and incrementing ``id`` until the driver -returns ``EINVAL``. - -In both cases, when the driver sets the ``V4L2_CTRL_FLAG_DISABLED`` flag -in the ``flags`` field this control is permanently disabled and should -be ignored by the application. [#f1]_ - -When the application ORs ``id`` with ``V4L2_CTRL_FLAG_NEXT_CTRL`` the -driver returns the next supported non-compound control, or ``EINVAL`` if -there is none. In addition, the ``V4L2_CTRL_FLAG_NEXT_COMPOUND`` flag -can be specified to enumerate all compound controls (i.e. controls with -type ≥ ``V4L2_CTRL_COMPOUND_TYPES`` and/or array control, in other words -controls that contain more than one value). Specify both -``V4L2_CTRL_FLAG_NEXT_CTRL`` and ``V4L2_CTRL_FLAG_NEXT_COMPOUND`` in -order to enumerate all controls, compound or not. Drivers which do not -support these flags yet always return ``EINVAL``. - -The ``VIDIOC_QUERY_EXT_CTRL`` ioctl was introduced in order to better -support controls that can use compound types, and to expose additional -control information that cannot be returned in struct -:ref:`v4l2_queryctrl <v4l2-queryctrl>` since that structure is full. - -``VIDIOC_QUERY_EXT_CTRL`` is used in the same way as -``VIDIOC_QUERYCTRL``, except that the ``reserved`` array must be zeroed -as well. - -Additional information is required for menu controls: the names of the -menu items. To query them applications set the ``id`` and ``index`` -fields of struct :ref:`v4l2_querymenu <v4l2-querymenu>` and call the -``VIDIOC_QUERYMENU`` ioctl with a pointer to this structure. The driver -fills the rest of the structure or returns an ``EINVAL`` error code when the -``id`` or ``index`` is invalid. Menu items are enumerated by calling -``VIDIOC_QUERYMENU`` with successive ``index`` values from struct -:ref:`v4l2_queryctrl <v4l2-queryctrl>` ``minimum`` to ``maximum``, -inclusive. - -.. note:: - - It is possible for ``VIDIOC_QUERYMENU`` to return - an ``EINVAL`` error code for some indices between ``minimum`` and - ``maximum``. In that case that particular menu item is not supported by - this driver. Also note that the ``minimum`` value is not necessarily 0. - -See also the examples in :ref:`control`. - - -.. tabularcolumns:: |p{1.2cm}|p{3.6cm}|p{12.7cm}| - -.. _v4l2-queryctrl: - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_queryctrl - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``id`` - - Identifies the control, set by the application. See - :ref:`control-id` for predefined IDs. When the ID is ORed with - V4L2_CTRL_FLAG_NEXT_CTRL the driver clears the flag and - returns the first control with a higher ID. Drivers which do not - support this flag yet always return an ``EINVAL`` error code. - * - __u32 - - ``type`` - - Type of control, see :c:type:`v4l2_ctrl_type`. - * - __u8 - - ``name``\ [32] - - Name of the control, a NUL-terminated ASCII string. This - information is intended for the user. - * - __s32 - - ``minimum`` - - Minimum value, inclusive. This field gives a lower bound for the - control. See enum :c:type:`v4l2_ctrl_type` how - the minimum value is to be used for each possible control type. - Note that this a signed 32-bit value. - * - __s32 - - ``maximum`` - - Maximum value, inclusive. This field gives an upper bound for the - control. See enum :c:type:`v4l2_ctrl_type` how - the maximum value is to be used for each possible control type. - Note that this a signed 32-bit value. - * - __s32 - - ``step`` - - This field gives a step size for the control. See enum - :c:type:`v4l2_ctrl_type` how the step value is - to be used for each possible control type. Note that this an - unsigned 32-bit value. - - Generally drivers should not scale hardware control values. It may - be necessary for example when the ``name`` or ``id`` imply a - particular unit and the hardware actually accepts only multiples - of said unit. If so, drivers must take care values are properly - rounded when scaling, such that errors will not accumulate on - repeated read-write cycles. - - This field gives the smallest change of an integer control - actually affecting hardware. Often the information is needed when - the user can change controls by keyboard or GUI buttons, rather - than a slider. When for example a hardware register accepts values - 0-511 and the driver reports 0-65535, step should be 128. - - Note that although signed, the step value is supposed to be always - positive. - * - __s32 - - ``default_value`` - - The default value of a ``V4L2_CTRL_TYPE_INTEGER``, ``_BOOLEAN``, - ``_BITMASK``, ``_MENU`` or ``_INTEGER_MENU`` control. Not valid - for other types of controls. - - .. note:: - - Drivers reset controls to their default value only when - the driver is first loaded, never afterwards. - * - __u32 - - ``flags`` - - Control flags, see :ref:`control-flags`. - * - __u32 - - ``reserved``\ [2] - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. tabularcolumns:: |p{1.2cm}|p{5.0cm}|p{11.3cm}| - -.. _v4l2-query-ext-ctrl: - -.. cssclass:: longtable - -.. flat-table:: struct v4l2_query_ext_ctrl - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``id`` - - Identifies the control, set by the application. See - :ref:`control-id` for predefined IDs. When the ID is ORed with - ``V4L2_CTRL_FLAG_NEXT_CTRL`` the driver clears the flag and - returns the first non-compound control with a higher ID. When the - ID is ORed with ``V4L2_CTRL_FLAG_NEXT_COMPOUND`` the driver clears - the flag and returns the first compound control with a higher ID. - Set both to get the first control (compound or not) with a higher - ID. - * - __u32 - - ``type`` - - Type of control, see :c:type:`v4l2_ctrl_type`. - * - char - - ``name``\ [32] - - Name of the control, a NUL-terminated ASCII string. This - information is intended for the user. - * - __s64 - - ``minimum`` - - Minimum value, inclusive. This field gives a lower bound for the - control. See enum :c:type:`v4l2_ctrl_type` how - the minimum value is to be used for each possible control type. - Note that this a signed 64-bit value. - * - __s64 - - ``maximum`` - - Maximum value, inclusive. This field gives an upper bound for the - control. See enum :c:type:`v4l2_ctrl_type` how - the maximum value is to be used for each possible control type. - Note that this a signed 64-bit value. - * - __u64 - - ``step`` - - This field gives a step size for the control. See enum - :c:type:`v4l2_ctrl_type` how the step value is - to be used for each possible control type. Note that this an - unsigned 64-bit value. - - Generally drivers should not scale hardware control values. It may - be necessary for example when the ``name`` or ``id`` imply a - particular unit and the hardware actually accepts only multiples - of said unit. If so, drivers must take care values are properly - rounded when scaling, such that errors will not accumulate on - repeated read-write cycles. - - This field gives the smallest change of an integer control - actually affecting hardware. Often the information is needed when - the user can change controls by keyboard or GUI buttons, rather - than a slider. When for example a hardware register accepts values - 0-511 and the driver reports 0-65535, step should be 128. - * - __s64 - - ``default_value`` - - The default value of a ``V4L2_CTRL_TYPE_INTEGER``, ``_INTEGER64``, - ``_BOOLEAN``, ``_BITMASK``, ``_MENU``, ``_INTEGER_MENU``, ``_U8`` - or ``_U16`` control. Not valid for other types of controls. - - .. note:: - - Drivers reset controls to their default value only when - the driver is first loaded, never afterwards. - * - __u32 - - ``flags`` - - Control flags, see :ref:`control-flags`. - * - __u32 - - ``elem_size`` - - The size in bytes of a single element of the array. Given a char - pointer ``p`` to a 3-dimensional array you can find the position - of cell ``(z, y, x)`` as follows: - ``p + ((z * dims[1] + y) * dims[0] + x) * elem_size``. - ``elem_size`` is always valid, also when the control isn't an - array. For string controls ``elem_size`` is equal to - ``maximum + 1``. - * - __u32 - - ``elems`` - - The number of elements in the N-dimensional array. If this control - is not an array, then ``elems`` is 1. The ``elems`` field can - never be 0. - * - __u32 - - ``nr_of_dims`` - - The number of dimension in the N-dimensional array. If this - control is not an array, then this field is 0. - * - __u32 - - ``dims[V4L2_CTRL_MAX_DIMS]`` - - The size of each dimension. The first ``nr_of_dims`` elements of - this array must be non-zero, all remaining elements must be zero. - * - __u32 - - ``reserved``\ [32] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - - -.. tabularcolumns:: |p{1.2cm}|p{1.0cm}|p{1.7cm}|p{13.0cm}| - -.. _v4l2-querymenu: - -.. flat-table:: struct v4l2_querymenu - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``id`` - - Identifies the control, set by the application from the respective - struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` ``id``. - * - __u32 - - ``index`` - - Index of the menu item, starting at zero, set by the application. - * - union { - - (anonymous) - * - __u8 - - ``name``\ [32] - - Name of the menu item, a NUL-terminated ASCII string. This - information is intended for the user. This field is valid for - ``V4L2_CTRL_TYPE_MENU`` type controls. - * - __s64 - - ``value`` - - Value of the integer menu item. This field is valid for - ``V4L2_CTRL_TYPE_INTEGER_MENU`` type controls. - * - } - - - * - __u32 - - ``reserved`` - - Reserved for future extensions. Drivers must set the array to - zero. - - - -.. tabularcolumns:: |p{5.8cm}|p{1.4cm}|p{1.0cm}|p{1.4cm}|p{6.9cm}| - -.. c:type:: v4l2_ctrl_type - -.. cssclass:: longtable - -.. flat-table:: enum v4l2_ctrl_type - :header-rows: 1 - :stub-columns: 0 - :widths: 30 5 5 5 55 - - * - Type - - ``minimum`` - - ``step`` - - ``maximum`` - - Description - * - ``V4L2_CTRL_TYPE_INTEGER`` - - any - - any - - any - - An integer-valued control ranging from minimum to maximum - inclusive. The step value indicates the increment between values. - * - ``V4L2_CTRL_TYPE_BOOLEAN`` - - 0 - - 1 - - 1 - - A boolean-valued control. Zero corresponds to "disabled", and one - means "enabled". - * - ``V4L2_CTRL_TYPE_MENU`` - - ≥ 0 - - 1 - - N-1 - - The control has a menu of N choices. The names of the menu items - can be enumerated with the ``VIDIOC_QUERYMENU`` ioctl. - * - ``V4L2_CTRL_TYPE_INTEGER_MENU`` - - ≥ 0 - - 1 - - N-1 - - The control has a menu of N choices. The values of the menu items - can be enumerated with the ``VIDIOC_QUERYMENU`` ioctl. This is - similar to ``V4L2_CTRL_TYPE_MENU`` except that instead of strings, - the menu items are signed 64-bit integers. - * - ``V4L2_CTRL_TYPE_BITMASK`` - - 0 - - n/a - - any - - A bitmask field. The maximum value is the set of bits that can be - used, all other bits are to be 0. The maximum value is interpreted - as a __u32, allowing the use of bit 31 in the bitmask. - * - ``V4L2_CTRL_TYPE_BUTTON`` - - 0 - - 0 - - 0 - - A control which performs an action when set. Drivers must ignore - the value passed with ``VIDIOC_S_CTRL`` and return an ``EACCES`` error - code on a ``VIDIOC_G_CTRL`` attempt. - * - ``V4L2_CTRL_TYPE_INTEGER64`` - - any - - any - - any - - A 64-bit integer valued control. Minimum, maximum and step size - cannot be queried using ``VIDIOC_QUERYCTRL``. Only - ``VIDIOC_QUERY_EXT_CTRL`` can retrieve the 64-bit min/max/step - values, they should be interpreted as n/a when using - ``VIDIOC_QUERYCTRL``. - * - ``V4L2_CTRL_TYPE_STRING`` - - ≥ 0 - - ≥ 1 - - ≥ 0 - - The minimum and maximum string lengths. The step size means that - the string must be (minimum + N * step) characters long for N ≥ 0. - These lengths do not include the terminating zero, so in order to - pass a string of length 8 to - :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` you need to - set the ``size`` field of struct - :c:type:`v4l2_ext_control` to 9. For - :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` you can set - the ``size`` field to ``maximum`` + 1. Which character encoding is - used will depend on the string control itself and should be part - of the control documentation. - * - ``V4L2_CTRL_TYPE_CTRL_CLASS`` - - n/a - - n/a - - n/a - - This is not a control. When ``VIDIOC_QUERYCTRL`` is called with a - control ID equal to a control class code (see :ref:`ctrl-class`) - + 1, the ioctl returns the name of the control class and this - control type. Older drivers which do not support this feature - return an ``EINVAL`` error code. - * - ``V4L2_CTRL_TYPE_U8`` - - any - - any - - any - - An unsigned 8-bit valued control ranging from minimum to maximum - inclusive. The step value indicates the increment between values. - * - ``V4L2_CTRL_TYPE_U16`` - - any - - any - - any - - An unsigned 16-bit valued control ranging from minimum to maximum - inclusive. The step value indicates the increment between values. - * - ``V4L2_CTRL_TYPE_U32`` - - any - - any - - any - - An unsigned 32-bit valued control ranging from minimum to maximum - inclusive. The step value indicates the increment between values. - * - ``V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_mpeg2_slice_params`, containing MPEG-2 - slice parameters for stateless video decoders. - * - ``V4L2_CTRL_TYPE_MPEG2_QUANTIZATION`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_mpeg2_quantization`, containing MPEG-2 - quantization matrices for stateless video decoders. - * - ``V4L2_CTRL_TYPE_AREA`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_area`, containing the width and the height - of a rectangular area. Units depend on the use case. - * - ``V4L2_CTRL_TYPE_H264_SPS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_h264_sps`, containing H264 - sequence parameters for stateless video decoders. - * - ``V4L2_CTRL_TYPE_H264_PPS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_h264_pps`, containing H264 - picture parameters for stateless video decoders. - * - ``V4L2_CTRL_TYPE_H264_SCALING_MATRIX`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_h264_scaling_matrix`, containing H264 - scaling matrices for stateless video decoders. - * - ``V4L2_CTRL_TYPE_H264_SLICE_PARAMS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_h264_slice_params`, containing H264 - slice parameters for stateless video decoders. - * - ``V4L2_CTRL_TYPE_H264_DECODE_PARAMS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_h264_decode_params`, containing H264 - decode parameters for stateless video decoders. - * - ``V4L2_CTRL_TYPE_HEVC_SPS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_hevc_sps`, containing HEVC Sequence - Parameter Set for stateless video decoders. - * - ``V4L2_CTRL_TYPE_HEVC_PPS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_hevc_pps`, containing HEVC Picture - Parameter Set for stateless video decoders. - * - ``V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS`` - - n/a - - n/a - - n/a - - A struct :c:type:`v4l2_ctrl_hevc_slice_params`, containing HEVC - slice parameters for stateless video decoders. - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _control-flags: - -.. cssclass:: longtable - -.. flat-table:: Control Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_CTRL_FLAG_DISABLED`` - - 0x0001 - - This control is permanently disabled and should be ignored by the - application. Any attempt to change the control will result in an - ``EINVAL`` error code. - * - ``V4L2_CTRL_FLAG_GRABBED`` - - 0x0002 - - This control is temporarily unchangeable, for example because - another application took over control of the respective resource. - Such controls may be displayed specially in a user interface. - Attempts to change the control may result in an ``EBUSY`` error code. - * - ``V4L2_CTRL_FLAG_READ_ONLY`` - - 0x0004 - - This control is permanently readable only. Any attempt to change - the control will result in an ``EINVAL`` error code. - * - ``V4L2_CTRL_FLAG_UPDATE`` - - 0x0008 - - A hint that changing this control may affect the value of other - controls within the same control class. Applications should update - their user interface accordingly. - * - ``V4L2_CTRL_FLAG_INACTIVE`` - - 0x0010 - - This control is not applicable to the current configuration and - should be displayed accordingly in a user interface. For example - the flag may be set on a MPEG audio level 2 bitrate control when - MPEG audio encoding level 1 was selected with another control. - * - ``V4L2_CTRL_FLAG_SLIDER`` - - 0x0020 - - A hint that this control is best represented as a slider-like - element in a user interface. - * - ``V4L2_CTRL_FLAG_WRITE_ONLY`` - - 0x0040 - - This control is permanently writable only. Any attempt to read the - control will result in an ``EACCES`` error code error code. This flag - is typically present for relative controls or action controls - where writing a value will cause the device to carry out a given - action (e. g. motor control) but no meaningful value can be - returned. - * - ``V4L2_CTRL_FLAG_VOLATILE`` - - 0x0080 - - This control is volatile, which means that the value of the - control changes continuously. A typical example would be the - current gain value if the device is in auto-gain mode. In such a - case the hardware calculates the gain value based on the lighting - conditions which can change over time. - - .. note:: - - Setting a new value for a volatile control will be ignored - unless - :ref:`V4L2_CTRL_FLAG_EXECUTE_ON_WRITE <FLAG_EXECUTE_ON_WRITE>` - is also set. - Setting a new value for a volatile control will *never* trigger a - :ref:`V4L2_EVENT_CTRL_CH_VALUE <ctrl-changes-flags>` event. - * - ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` - - 0x0100 - - This control has a pointer type, so its value has to be accessed - using one of the pointer fields of struct - :c:type:`v4l2_ext_control`. This flag is set - for controls that are an array, string, or have a compound type. - In all cases you have to set a pointer to memory containing the - payload of the control. - * .. _FLAG_EXECUTE_ON_WRITE: - - - ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE`` - - 0x0200 - - The value provided to the control will be propagated to the driver - even if it remains constant. This is required when the control - represents an action on the hardware. For example: clearing an - error flag or triggering the flash. All the controls of the type - ``V4L2_CTRL_TYPE_BUTTON`` have this flag set. - * .. _FLAG_MODIFY_LAYOUT: - - - ``V4L2_CTRL_FLAG_MODIFY_LAYOUT`` - - 0x0400 - - Changing this control value may modify the layout of the - buffer (for video devices) or the media bus format (for sub-devices). - - A typical example would be the ``V4L2_CID_ROTATE`` control. - - Note that typically controls with this flag will also set the - ``V4L2_CTRL_FLAG_GRABBED`` flag when buffers are allocated or - streaming is in progress since most drivers do not support changing - the format in that case. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` ``id`` is - invalid. The struct :ref:`v4l2_querymenu <v4l2-querymenu>` ``id`` - is invalid or ``index`` is out of range (less than ``minimum`` or - greater than ``maximum``) or this particular menu item is not - supported by the driver. - -EACCES - An attempt was made to read a write-only control. - -.. [#f1] - ``V4L2_CTRL_FLAG_DISABLED`` was intended for two purposes: Drivers - can skip predefined controls not supported by the hardware (although - returning ``EINVAL`` would do as well), or disable predefined and private - controls after hardware detection without the trouble of reordering - control arrays and indices (``EINVAL`` cannot be used to skip private - controls because it would prematurely end the enumeration). diff --git a/Documentation/media/uapi/v4l/vidioc-querystd.rst b/Documentation/media/uapi/v4l/vidioc-querystd.rst deleted file mode 100644 index d8cf28274cfc..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-querystd.rst +++ /dev/null @@ -1,77 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_QUERYSTD: - -********************************************* -ioctl VIDIOC_QUERYSTD, VIDIOC_SUBDEV_QUERYSTD -********************************************* - -Name -==== - -VIDIOC_QUERYSTD - VIDIOC_SUBDEV_QUERYSTD - Sense the video standard received by the current input - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_QUERYSTD, v4l2_std_id *argp ) - :name: VIDIOC_QUERYSTD - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_QUERYSTD, v4l2_std_id *argp ) - :name: VIDIOC_SUBDEV_QUERYSTD - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to :c:type:`v4l2_std_id`. - - -Description -=========== - -The hardware may be able to detect the current video standard -automatically. To do so, applications call :ref:`VIDIOC_QUERYSTD` with a -pointer to a :ref:`v4l2_std_id <v4l2-std-id>` type. The driver -stores here a set of candidates, this can be a single flag or a set of -supported standards if for example the hardware can only distinguish -between 50 and 60 Hz systems. If no signal was detected, then the driver -will return V4L2_STD_UNKNOWN. When detection is not possible or fails, -the set must contain all standards supported by the current video input -or output. - -.. note:: - - Drivers shall *not* switch the video standard - automatically if a new video standard is detected. Instead, drivers - should send the ``V4L2_EVENT_SOURCE_CHANGE`` event (if they support - this) and expect that userspace will take action by calling - :ref:`VIDIOC_QUERYSTD`. The reason is that a new video standard can mean - different buffer sizes as well, and you cannot change buffer sizes on - the fly. In general, applications that receive the Source Change event - will have to call :ref:`VIDIOC_QUERYSTD`, and if the detected video - standard is valid they will have to stop streaming, set the new - standard, allocate new buffers and start streaming again. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -ENODATA - Standard video timings are not supported for this input or output. diff --git a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst deleted file mode 100644 index d0c643db477a..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst +++ /dev/null @@ -1,169 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_REQBUFS: - -******************** -ioctl VIDIOC_REQBUFS -******************** - -Name -==== - -VIDIOC_REQBUFS - Initiate Memory Mapping, User Pointer I/O or DMA buffer I/O - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_REQBUFS, struct v4l2_requestbuffers *argp ) - :name: VIDIOC_REQBUFS - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_requestbuffers`. - -Description -=========== - -This ioctl is used to initiate :ref:`memory mapped <mmap>`, -:ref:`user pointer <userp>` or :ref:`DMABUF <dmabuf>` based I/O. -Memory mapped buffers are located in device memory and must be allocated -with this ioctl before they can be mapped into the application's address -space. User buffers are allocated by applications themselves, and this -ioctl is merely used to switch the driver into user pointer I/O mode and -to setup some internal structures. Similarly, DMABUF buffers are -allocated by applications through a device driver, and this ioctl only -configures the driver into DMABUF I/O mode without performing any direct -allocation. - -To allocate device buffers applications initialize all fields of the -struct :c:type:`v4l2_requestbuffers` structure. They set the ``type`` -field to the respective stream or buffer type, the ``count`` field to -the desired number of buffers, ``memory`` must be set to the requested -I/O method and the ``reserved`` array must be zeroed. When the ioctl is -called with a pointer to this structure the driver will attempt to -allocate the requested number of buffers and it stores the actual number -allocated in the ``count`` field. It can be smaller than the number -requested, even zero, when the driver runs out of free memory. A larger -number is also possible when the driver requires more buffers to -function correctly. For example video output requires at least two -buffers, one displayed and one filled by the application. - -When the I/O method is not supported the ioctl returns an ``EINVAL`` error -code. - -Applications can call :ref:`VIDIOC_REQBUFS` again to change the number of -buffers. Note that if any buffers are still mapped or exported via DMABUF, -then :ref:`VIDIOC_REQBUFS` can only succeed if the -``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` capability is set. Otherwise -:ref:`VIDIOC_REQBUFS` will return the ``EBUSY`` error code. -If ``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` is set, then these buffers are -orphaned and will be freed when they are unmapped or when the exported DMABUF -fds are closed. A ``count`` value of zero frees or orphans all buffers, after -aborting or finishing any DMA in progress, an implicit -:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`. - - -.. c:type:: v4l2_requestbuffers - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_requestbuffers - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``count`` - - The number of buffers requested or granted. - * - __u32 - - ``type`` - - Type of the stream or buffers, this is the same as the struct - :c:type:`v4l2_format` ``type`` field. See - :c:type:`v4l2_buf_type` for valid values. - * - __u32 - - ``memory`` - - Applications set this field to ``V4L2_MEMORY_MMAP``, - ``V4L2_MEMORY_DMABUF`` or ``V4L2_MEMORY_USERPTR``. See - :c:type:`v4l2_memory`. - * - __u32 - - ``capabilities`` - - Set by the driver. If 0, then the driver doesn't support - capabilities. In that case all you know is that the driver is - guaranteed to support ``V4L2_MEMORY_MMAP`` and *might* support - other :c:type:`v4l2_memory` types. It will not support any others - capabilities. - - If you want to query the capabilities with a minimum of side-effects, - then this can be called with ``count`` set to 0, ``memory`` set to - ``V4L2_MEMORY_MMAP`` and ``type`` set to the buffer type. This will - free any previously allocated buffers, so this is typically something - that will be done at the start of the application. - * - __u32 - - ``reserved``\ [1] - - A place holder for future extensions. Drivers and applications - must set the array to zero. - -.. tabularcolumns:: |p{6.1cm}|p{2.2cm}|p{8.7cm}| - -.. _v4l2-buf-capabilities: -.. _V4L2-BUF-CAP-SUPPORTS-MMAP: -.. _V4L2-BUF-CAP-SUPPORTS-USERPTR: -.. _V4L2-BUF-CAP-SUPPORTS-DMABUF: -.. _V4L2-BUF-CAP-SUPPORTS-REQUESTS: -.. _V4L2-BUF-CAP-SUPPORTS-ORPHANED-BUFS: -.. _V4L2-BUF-CAP-SUPPORTS-M2M-HOLD-CAPTURE-BUF: - -.. cssclass:: longtable - -.. flat-table:: V4L2 Buffer Capabilities Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_BUF_CAP_SUPPORTS_MMAP`` - - 0x00000001 - - This buffer type supports the ``V4L2_MEMORY_MMAP`` streaming mode. - * - ``V4L2_BUF_CAP_SUPPORTS_USERPTR`` - - 0x00000002 - - This buffer type supports the ``V4L2_MEMORY_USERPTR`` streaming mode. - * - ``V4L2_BUF_CAP_SUPPORTS_DMABUF`` - - 0x00000004 - - This buffer type supports the ``V4L2_MEMORY_DMABUF`` streaming mode. - * - ``V4L2_BUF_CAP_SUPPORTS_REQUESTS`` - - 0x00000008 - - This buffer type supports :ref:`requests <media-request-api>`. - * - ``V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS`` - - 0x00000010 - - The kernel allows calling :ref:`VIDIOC_REQBUFS` while buffers are still - mapped or exported via DMABUF. These orphaned buffers will be freed - when they are unmapped or when the exported DMABUF fds are closed. - * - ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` - - 0x00000020 - - Only valid for stateless decoders. If set, then userspace can set the - ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag to hold off on returning the - capture buffer until the OUTPUT timestamp changes. - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The buffer type (``type`` field) or the requested I/O method - (``memory``) is not supported. diff --git a/Documentation/media/uapi/v4l/vidioc-s-hw-freq-seek.rst b/Documentation/media/uapi/v4l/vidioc-s-hw-freq-seek.rst deleted file mode 100644 index 4daec97651f2..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-s-hw-freq-seek.rst +++ /dev/null @@ -1,147 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_S_HW_FREQ_SEEK: - -*************************** -ioctl VIDIOC_S_HW_FREQ_SEEK -*************************** - -Name -==== - -VIDIOC_S_HW_FREQ_SEEK - Perform a hardware frequency seek - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_S_HW_FREQ_SEEK, struct v4l2_hw_freq_seek *argp ) - :name: VIDIOC_S_HW_FREQ_SEEK - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_hw_freq_seek`. - - -Description -=========== - -Start a hardware frequency seek from the current frequency. To do this -applications initialize the ``tuner``, ``type``, ``seek_upward``, -``wrap_around``, ``spacing``, ``rangelow`` and ``rangehigh`` fields, and -zero out the ``reserved`` array of a struct -:c:type:`v4l2_hw_freq_seek` and call the -``VIDIOC_S_HW_FREQ_SEEK`` ioctl with a pointer to this structure. - -The ``rangelow`` and ``rangehigh`` fields can be set to a non-zero value -to tell the driver to search a specific band. If the struct -:c:type:`v4l2_tuner` ``capability`` field has the -``V4L2_TUNER_CAP_HWSEEK_PROG_LIM`` flag set, these values must fall -within one of the bands returned by -:ref:`VIDIOC_ENUM_FREQ_BANDS`. If the -``V4L2_TUNER_CAP_HWSEEK_PROG_LIM`` flag is not set, then these values -must exactly match those of one of the bands returned by -:ref:`VIDIOC_ENUM_FREQ_BANDS`. If the -current frequency of the tuner does not fall within the selected band it -will be clamped to fit in the band before the seek is started. - -If an error is returned, then the original frequency will be restored. - -This ioctl is supported if the ``V4L2_CAP_HW_FREQ_SEEK`` capability is -set. - -If this ioctl is called from a non-blocking filehandle, then ``EAGAIN`` -error code is returned and no seek takes place. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_hw_freq_seek - -.. flat-table:: struct v4l2_hw_freq_seek - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``tuner`` - - The tuner index number. This is the same value as in the struct - :c:type:`v4l2_input` ``tuner`` field and the struct - :c:type:`v4l2_tuner` ``index`` field. - * - __u32 - - ``type`` - - The tuner type. This is the same value as in the struct - :c:type:`v4l2_tuner` ``type`` field. See - :c:type:`v4l2_tuner_type` - * - __u32 - - ``seek_upward`` - - If non-zero, seek upward from the current frequency, else seek - downward. - * - __u32 - - ``wrap_around`` - - If non-zero, wrap around when at the end of the frequency range, - else stop seeking. The struct :c:type:`v4l2_tuner` - ``capability`` field will tell you what the hardware supports. - * - __u32 - - ``spacing`` - - If non-zero, defines the hardware seek resolution in Hz. The - driver selects the nearest value that is supported by the device. - If spacing is zero a reasonable default value is used. - * - __u32 - - ``rangelow`` - - If non-zero, the lowest tunable frequency of the band to search in - units of 62.5 kHz, or if the struct - :c:type:`v4l2_tuner` ``capability`` field has the - ``V4L2_TUNER_CAP_LOW`` flag set, in units of 62.5 Hz or if the - struct :c:type:`v4l2_tuner` ``capability`` field has - the ``V4L2_TUNER_CAP_1HZ`` flag set, in units of 1 Hz. If - ``rangelow`` is zero a reasonable default value is used. - * - __u32 - - ``rangehigh`` - - If non-zero, the highest tunable frequency of the band to search - in units of 62.5 kHz, or if the struct - :c:type:`v4l2_tuner` ``capability`` field has the - ``V4L2_TUNER_CAP_LOW`` flag set, in units of 62.5 Hz or if the - struct :c:type:`v4l2_tuner` ``capability`` field has - the ``V4L2_TUNER_CAP_1HZ`` flag set, in units of 1 Hz. If - ``rangehigh`` is zero a reasonable default value is used. - * - __u32 - - ``reserved``\ [5] - - Reserved for future extensions. Applications must set the array to - zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The ``tuner`` index is out of bounds, the ``wrap_around`` value is - not supported or one of the values in the ``type``, ``rangelow`` or - ``rangehigh`` fields is wrong. - -EAGAIN - Attempted to call ``VIDIOC_S_HW_FREQ_SEEK`` with the filehandle in - non-blocking mode. - -ENODATA - The hardware seek found no channels. - -EBUSY - Another hardware seek is already in progress. diff --git a/Documentation/media/uapi/v4l/vidioc-streamon.rst b/Documentation/media/uapi/v4l/vidioc-streamon.rst deleted file mode 100644 index 2b5528ec9f89..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-streamon.rst +++ /dev/null @@ -1,113 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_STREAMON: - -*************************************** -ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF -*************************************** - -Name -==== - -VIDIOC_STREAMON - VIDIOC_STREAMOFF - Start or stop streaming I/O - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_STREAMON, const int *argp ) - :name: VIDIOC_STREAMON - -.. c:function:: int ioctl( int fd, VIDIOC_STREAMOFF, const int *argp ) - :name: VIDIOC_STREAMOFF - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to an integer. - -Description -=========== - -The ``VIDIOC_STREAMON`` and ``VIDIOC_STREAMOFF`` ioctl start and stop -the capture or output process during streaming -(:ref:`memory mapping <mmap>`, :ref:`user pointer <userp>` or -:ref:`DMABUF <dmabuf>`) I/O. - -Capture hardware is disabled and no input buffers are filled (if there -are any empty buffers in the incoming queue) until ``VIDIOC_STREAMON`` -has been called. Output hardware is disabled and no video signal is -produced until ``VIDIOC_STREAMON`` has been called. The ioctl will -succeed when at least one output buffer is in the incoming queue. - -Memory-to-memory devices will not start until ``VIDIOC_STREAMON`` has -been called for both the capture and output stream types. - -If ``VIDIOC_STREAMON`` fails then any already queued buffers will remain -queued. - -The ``VIDIOC_STREAMOFF`` ioctl, apart of aborting or finishing any DMA -in progress, unlocks any user pointer buffers locked in physical memory, -and it removes all buffers from the incoming and outgoing queues. That -means all images captured but not dequeued yet will be lost, likewise -all images enqueued for output but not transmitted yet. I/O returns to -the same state as after calling -:ref:`VIDIOC_REQBUFS` and can be restarted -accordingly. - -If buffers have been queued with :ref:`VIDIOC_QBUF` and -``VIDIOC_STREAMOFF`` is called without ever having called -``VIDIOC_STREAMON``, then those queued buffers will also be removed from -the incoming queue and all are returned to the same state as after -calling :ref:`VIDIOC_REQBUFS` and can be restarted -accordingly. - -Both ioctls take a pointer to an integer, the desired buffer or stream -type. This is the same as struct -:c:type:`v4l2_requestbuffers` ``type``. - -If ``VIDIOC_STREAMON`` is called when streaming is already in progress, -or if ``VIDIOC_STREAMOFF`` is called when streaming is already stopped, -then 0 is returned. Nothing happens in the case of ``VIDIOC_STREAMON``, -but ``VIDIOC_STREAMOFF`` will return queued buffers to their starting -state as mentioned above. - -.. note:: - - Applications can be preempted for unknown periods right before - or after the ``VIDIOC_STREAMON`` or ``VIDIOC_STREAMOFF`` calls, there is - no notion of starting or stopping "now". Buffer timestamps can be used - to synchronize with other events. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The buffer ``type`` is not supported, or no buffers have been - allocated (memory mapping) or enqueued (output) yet. - -EPIPE - The driver implements - :ref:`pad-level format configuration <pad-level-formats>` and the - pipeline configuration is invalid. - -ENOLINK - The driver implements Media Controller interface and the pipeline - link configuration is invalid. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-enum-frame-interval.rst b/Documentation/media/uapi/v4l/vidioc-subdev-enum-frame-interval.rst deleted file mode 100644 index 6b4bf9ef5606..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-enum-frame-interval.rst +++ /dev/null @@ -1,120 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: - -*************************************** -ioctl VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL -*************************************** - -Name -==== - -VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL - Enumerate frame intervals - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL, struct v4l2_subdev_frame_interval_enum * argp ) - :name: VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_frame_interval_enum`. - - -Description -=========== - -This ioctl lets applications enumerate available frame intervals on a -given sub-device pad. Frame intervals only makes sense for sub-devices -that can control the frame period on their own. This includes, for -instance, image sensors and TV tuners. - -For the common use case of image sensors, the frame intervals available -on the sub-device output pad depend on the frame format and size on the -same pad. Applications must thus specify the desired format and size -when enumerating frame intervals. - -To enumerate frame intervals applications initialize the ``index``, -``pad``, ``which``, ``code``, ``width`` and ``height`` fields of struct -:c:type:`v4l2_subdev_frame_interval_enum` -and call the :ref:`VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL` ioctl with a pointer -to this structure. Drivers fill the rest of the structure or return an -EINVAL error code if one of the input fields is invalid. All frame -intervals are enumerable by beginning at index zero and incrementing by -one until ``EINVAL`` is returned. - -Available frame intervals may depend on the current 'try' formats at -other pads of the sub-device, as well as on the current active links. -See :ref:`VIDIOC_SUBDEV_G_FMT` for more -information about the try formats. - -Sub-devices that support the frame interval enumeration ioctl should -implemented it on a single pad only. Its behaviour when supported on -multiple pads of the same sub-device is not defined. - -.. c:type:: v4l2_subdev_frame_interval_enum - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_subdev_frame_interval_enum - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Number of the format in the enumeration, set by the application. - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. - * - __u32 - - ``code`` - - The media bus format code, as defined in - :ref:`v4l2-mbus-format`. - * - __u32 - - ``width`` - - Frame width, in pixels. - * - __u32 - - ``height`` - - Frame height, in pixels. - * - struct :c:type:`v4l2_fract` - - ``interval`` - - Period, in seconds, between consecutive video frames. - * - __u32 - - ``which`` - - Frame intervals to be enumerated, from enum - :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct - :c:type:`v4l2_subdev_frame_interval_enum` - ``pad`` references a non-existing pad, one of the ``code``, - ``width`` or ``height`` fields are invalid for the given pad or the - ``index`` field is out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-enum-frame-size.rst b/Documentation/media/uapi/v4l/vidioc-subdev-enum-frame-size.rst deleted file mode 100644 index 253b128b194e..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-enum-frame-size.rst +++ /dev/null @@ -1,125 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_ENUM_FRAME_SIZE: - -*********************************** -ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE -*********************************** - -Name -==== - -VIDIOC_SUBDEV_ENUM_FRAME_SIZE - Enumerate media bus frame sizes - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_ENUM_FRAME_SIZE, struct v4l2_subdev_frame_size_enum * argp ) - :name: VIDIOC_SUBDEV_ENUM_FRAME_SIZE - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_frame_size_enum`. - - -Description -=========== - -This ioctl allows applications to enumerate all frame sizes supported by -a sub-device on the given pad for the given media bus format. Supported -formats can be retrieved with the -:ref:`VIDIOC_SUBDEV_ENUM_MBUS_CODE` -ioctl. - -To enumerate frame sizes applications initialize the ``pad``, ``which`` -, ``code`` and ``index`` fields of the struct -:c:type:`v4l2_subdev_mbus_code_enum` and -call the :ref:`VIDIOC_SUBDEV_ENUM_FRAME_SIZE` ioctl with a pointer to the -structure. Drivers fill the minimum and maximum frame sizes or return an -EINVAL error code if one of the input parameters is invalid. - -Sub-devices that only support discrete frame sizes (such as most -sensors) will return one or more frame sizes with identical minimum and -maximum values. - -Not all possible sizes in given [minimum, maximum] ranges need to be -supported. For instance, a scaler that uses a fixed-point scaling ratio -might not be able to produce every frame size between the minimum and -maximum values. Applications must use the -:ref:`VIDIOC_SUBDEV_S_FMT <VIDIOC_SUBDEV_G_FMT>` ioctl to try the -sub-device for an exact supported frame size. - -Available frame sizes may depend on the current 'try' formats at other -pads of the sub-device, as well as on the current active links and the -current values of V4L2 controls. See -:ref:`VIDIOC_SUBDEV_G_FMT` for more -information about try formats. - - -.. c:type:: v4l2_subdev_frame_size_enum - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_subdev_frame_size_enum - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``index`` - - Number of the format in the enumeration, set by the application. - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. - * - __u32 - - ``code`` - - The media bus format code, as defined in - :ref:`v4l2-mbus-format`. - * - __u32 - - ``min_width`` - - Minimum frame width, in pixels. - * - __u32 - - ``max_width`` - - Maximum frame width, in pixels. - * - __u32 - - ``min_height`` - - Minimum frame height, in pixels. - * - __u32 - - ``max_height`` - - Maximum frame height, in pixels. - * - __u32 - - ``which`` - - Frame sizes to be enumerated, from enum - :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct - :c:type:`v4l2_subdev_frame_size_enum` - ``pad`` references a non-existing pad, the ``code`` is invalid for - the given pad or the ``index`` field is out of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-enum-mbus-code.rst b/Documentation/media/uapi/v4l/vidioc-subdev-enum-mbus-code.rst deleted file mode 100644 index fefe4d7349ee..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-enum-mbus-code.rst +++ /dev/null @@ -1,98 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_ENUM_MBUS_CODE: - -********************************** -ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE -********************************** - -Name -==== - -VIDIOC_SUBDEV_ENUM_MBUS_CODE - Enumerate media bus formats - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_ENUM_MBUS_CODE, struct v4l2_subdev_mbus_code_enum * argp ) - :name: VIDIOC_SUBDEV_ENUM_MBUS_CODE - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_mbus_code_enum`. - - -Description -=========== - -To enumerate media bus formats available at a given sub-device pad -applications initialize the ``pad``, ``which`` and ``index`` fields of -struct -:c:type:`v4l2_subdev_mbus_code_enum` and -call the :ref:`VIDIOC_SUBDEV_ENUM_MBUS_CODE` ioctl with a pointer to this -structure. Drivers fill the rest of the structure or return an ``EINVAL`` -error code if either the ``pad`` or ``index`` are invalid. All media bus -formats are enumerable by beginning at index zero and incrementing by -one until ``EINVAL`` is returned. - -Available media bus formats may depend on the current 'try' formats at -other pads of the sub-device, as well as on the current active links. -See :ref:`VIDIOC_SUBDEV_G_FMT` for more -information about the try formats. - - -.. c:type:: v4l2_subdev_mbus_code_enum - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_subdev_mbus_code_enum - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. - * - __u32 - - ``index`` - - Number of the format in the enumeration, set by the application. - * - __u32 - - ``code`` - - The media bus format code, as defined in - :ref:`v4l2-mbus-format`. - * - __u32 - - ``which`` - - Media bus format codes to be enumerated, from enum - :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EINVAL - The struct - :c:type:`v4l2_subdev_mbus_code_enum` - ``pad`` references a non-existing pad, or the ``index`` field is out - of bounds. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-g-crop.rst b/Documentation/media/uapi/v4l/vidioc-subdev-g-crop.rst deleted file mode 100644 index 632ee053accc..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-g-crop.rst +++ /dev/null @@ -1,125 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_G_CROP: - -************************************************ -ioctl VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP -************************************************ - -Name -==== - -VIDIOC_SUBDEV_G_CROP - VIDIOC_SUBDEV_S_CROP - Get or set the crop rectangle on a subdev pad - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_CROP, struct v4l2_subdev_crop *argp ) - :name: VIDIOC_SUBDEV_G_CROP - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_CROP, const struct v4l2_subdev_crop *argp ) - :name: VIDIOC_SUBDEV_S_CROP - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_crop`. - - -Description -=========== - -.. note:: - - This is an :ref:`obsolete` interface and may be removed - in the future. It is superseded by - :ref:`the selection API <VIDIOC_SUBDEV_G_SELECTION>`. - -To retrieve the current crop rectangle applications set the ``pad`` -field of a struct :c:type:`v4l2_subdev_crop` to the -desired pad number as reported by the media API and the ``which`` field -to ``V4L2_SUBDEV_FORMAT_ACTIVE``. They then call the -``VIDIOC_SUBDEV_G_CROP`` ioctl with a pointer to this structure. The -driver fills the members of the ``rect`` field or returns ``EINVAL`` error -code if the input arguments are invalid, or if cropping is not supported -on the given pad. - -To change the current crop rectangle applications set both the ``pad`` -and ``which`` fields and all members of the ``rect`` field. They then -call the ``VIDIOC_SUBDEV_S_CROP`` ioctl with a pointer to this -structure. The driver verifies the requested crop rectangle, adjusts it -based on the hardware capabilities and configures the device. Upon -return the struct :c:type:`v4l2_subdev_crop` -contains the current format as would be returned by a -``VIDIOC_SUBDEV_G_CROP`` call. - -Applications can query the device capabilities by setting the ``which`` -to ``V4L2_SUBDEV_FORMAT_TRY``. When set, 'try' crop rectangles are not -applied to the device by the driver, but are mangled exactly as active -crop rectangles and stored in the sub-device file handle. Two -applications querying the same sub-device would thus not interact with -each other. - -Drivers must not return an error solely because the requested crop -rectangle doesn't match the device capabilities. They must instead -modify the rectangle to match what the hardware can provide. The -modified format should be as close as possible to the original request. - - -.. c:type:: v4l2_subdev_crop - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_subdev_crop - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``pad`` - - Pad number as reported by the media framework. - * - __u32 - - ``which`` - - Crop rectangle to get or set, from enum - :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`. - * - struct :c:type:`v4l2_rect` - - ``rect`` - - Crop rectangle boundaries, in pixels. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - The crop rectangle can't be changed because the pad is currently - busy. This can be caused, for instance, by an active video stream on - the pad. The ioctl must not be retried without performing another - action to fix the problem first. Only returned by - ``VIDIOC_SUBDEV_S_CROP`` - -EINVAL - The struct :c:type:`v4l2_subdev_crop` ``pad`` - references a non-existing pad, the ``which`` field references a - non-existing format, or cropping is not supported on the given - subdev pad. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-g-fmt.rst b/Documentation/media/uapi/v4l/vidioc-subdev-g-fmt.rst deleted file mode 100644 index 472577bd1745..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-g-fmt.rst +++ /dev/null @@ -1,154 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_G_FMT: - -********************************************** -ioctl VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT -********************************************** - -Name -==== - -VIDIOC_SUBDEV_G_FMT - VIDIOC_SUBDEV_S_FMT - Get or set the data format on a subdev pad - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_FMT, struct v4l2_subdev_format *argp ) - :name: VIDIOC_SUBDEV_G_FMT - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_FMT, struct v4l2_subdev_format *argp ) - :name: VIDIOC_SUBDEV_S_FMT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_format`. - - -Description -=========== - -These ioctls are used to negotiate the frame format at specific subdev -pads in the image pipeline. - -To retrieve the current format applications set the ``pad`` field of a -struct :c:type:`v4l2_subdev_format` to the desired -pad number as reported by the media API and the ``which`` field to -``V4L2_SUBDEV_FORMAT_ACTIVE``. When they call the -``VIDIOC_SUBDEV_G_FMT`` ioctl with a pointer to this structure the -driver fills the members of the ``format`` field. - -To change the current format applications set both the ``pad`` and -``which`` fields and all members of the ``format`` field. When they call -the ``VIDIOC_SUBDEV_S_FMT`` ioctl with a pointer to this structure the -driver verifies the requested format, adjusts it based on the hardware -capabilities and configures the device. Upon return the struct -:c:type:`v4l2_subdev_format` contains the current -format as would be returned by a ``VIDIOC_SUBDEV_G_FMT`` call. - -Applications can query the device capabilities by setting the ``which`` -to ``V4L2_SUBDEV_FORMAT_TRY``. When set, 'try' formats are not applied -to the device by the driver, but are changed exactly as active formats -and stored in the sub-device file handle. Two applications querying the -same sub-device would thus not interact with each other. - -For instance, to try a format at the output pad of a sub-device, -applications would first set the try format at the sub-device input with -the ``VIDIOC_SUBDEV_S_FMT`` ioctl. They would then either retrieve the -default format at the output pad with the ``VIDIOC_SUBDEV_G_FMT`` ioctl, -or set the desired output pad format with the ``VIDIOC_SUBDEV_S_FMT`` -ioctl and check the returned value. - -Try formats do not depend on active formats, but can depend on the -current links configuration or sub-device controls value. For instance, -a low-pass noise filter might crop pixels at the frame boundaries, -modifying its output frame size. - -Drivers must not return an error solely because the requested format -doesn't match the device capabilities. They must instead modify the -format to match what the hardware can provide. The modified format -should be as close as possible to the original request. - - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_subdev_format - -.. flat-table:: struct v4l2_subdev_format - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. - * - __u32 - - ``which`` - - Format to modified, from enum - :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`. - * - struct :c:type:`v4l2_mbus_framefmt` - - ``format`` - - Definition of an image format, see :c:type:`v4l2_mbus_framefmt` for - details. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - - -.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| - -.. _v4l2-subdev-format-whence: - -.. flat-table:: enum v4l2_subdev_format_whence - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - V4L2_SUBDEV_FORMAT_TRY - - 0 - - Try formats, used for querying device capabilities. - * - V4L2_SUBDEV_FORMAT_ACTIVE - - 1 - - Active formats, applied to the hardware. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - The format can't be changed because the pad is currently busy. This - can be caused, for instance, by an active video stream on the pad. - The ioctl must not be retried without performing another action to - fix the problem first. Only returned by ``VIDIOC_SUBDEV_S_FMT`` - -EINVAL - The struct :c:type:`v4l2_subdev_format` - ``pad`` references a non-existing pad, or the ``which`` field - references a non-existing format. - - -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-g-frame-interval.rst b/Documentation/media/uapi/v4l/vidioc-subdev-g-frame-interval.rst deleted file mode 100644 index 4b1b4bc78bfe..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-g-frame-interval.rst +++ /dev/null @@ -1,120 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_G_FRAME_INTERVAL: - -******************************************************************** -ioctl VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL -******************************************************************** - -Name -==== - -VIDIOC_SUBDEV_G_FRAME_INTERVAL - VIDIOC_SUBDEV_S_FRAME_INTERVAL - Get or set the frame interval on a subdev pad - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_FRAME_INTERVAL, struct v4l2_subdev_frame_interval *argp ) - :name: VIDIOC_SUBDEV_G_FRAME_INTERVAL - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_FRAME_INTERVAL, struct v4l2_subdev_frame_interval *argp ) - :name: VIDIOC_SUBDEV_S_FRAME_INTERVAL - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_frame_interval`. - - -Description -=========== - -These ioctls are used to get and set the frame interval at specific -subdev pads in the image pipeline. The frame interval only makes sense -for sub-devices that can control the frame period on their own. This -includes, for instance, image sensors and TV tuners. Sub-devices that -don't support frame intervals must not implement these ioctls. - -To retrieve the current frame interval applications set the ``pad`` -field of a struct -:c:type:`v4l2_subdev_frame_interval` to -the desired pad number as reported by the media controller API. When -they call the ``VIDIOC_SUBDEV_G_FRAME_INTERVAL`` ioctl with a pointer to -this structure the driver fills the members of the ``interval`` field. - -To change the current frame interval applications set both the ``pad`` -field and all members of the ``interval`` field. When they call the -``VIDIOC_SUBDEV_S_FRAME_INTERVAL`` ioctl with a pointer to this -structure the driver verifies the requested interval, adjusts it based -on the hardware capabilities and configures the device. Upon return the -struct -:c:type:`v4l2_subdev_frame_interval` -contains the current frame interval as would be returned by a -``VIDIOC_SUBDEV_G_FRAME_INTERVAL`` call. - -Drivers must not return an error solely because the requested interval -doesn't match the device capabilities. They must instead modify the -interval to match what the hardware can provide. The modified interval -should be as close as possible to the original request. - -Changing the frame interval shall never change the format. Changing the -format, on the other hand, may change the frame interval. - -Sub-devices that support the frame interval ioctls should implement them -on a single pad only. Their behaviour when supported on multiple pads of -the same sub-device is not defined. - - -.. c:type:: v4l2_subdev_frame_interval - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_subdev_frame_interval - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``pad`` - - Pad number as reported by the media controller API. - * - struct :c:type:`v4l2_fract` - - ``interval`` - - Period, in seconds, between consecutive video frames. - * - __u32 - - ``reserved``\ [9] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - The frame interval can't be changed because the pad is currently - busy. This can be caused, for instance, by an active video stream on - the pad. The ioctl must not be retried without performing another - action to fix the problem first. Only returned by - ``VIDIOC_SUBDEV_S_FRAME_INTERVAL`` - -EINVAL - The struct - :c:type:`v4l2_subdev_frame_interval` - ``pad`` references a non-existing pad, or the pad doesn't support - frame intervals. diff --git a/Documentation/media/uapi/v4l/vidioc-subdev-g-selection.rst b/Documentation/media/uapi/v4l/vidioc-subdev-g-selection.rst deleted file mode 100644 index fc73d27e6d74..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subdev-g-selection.rst +++ /dev/null @@ -1,125 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBDEV_G_SELECTION: - -********************************************************** -ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION -********************************************************** - -Name -==== - -VIDIOC_SUBDEV_G_SELECTION - VIDIOC_SUBDEV_S_SELECTION - Get or set selection rectangles on a subdev pad - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_G_SELECTION, struct v4l2_subdev_selection *argp ) - :name: VIDIOC_SUBDEV_G_SELECTION - -.. c:function:: int ioctl( int fd, VIDIOC_SUBDEV_S_SELECTION, struct v4l2_subdev_selection *argp ) - :name: VIDIOC_SUBDEV_S_SELECTION - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_subdev_selection`. - - -Description -=========== - -The selections are used to configure various image processing -functionality performed by the subdevs which affect the image size. This -currently includes cropping, scaling and composition. - -The selection API replaces -:ref:`the old subdev crop API <VIDIOC_SUBDEV_G_CROP>`. All the -function of the crop API, and more, are supported by the selections API. - -See :ref:`subdev` for more information on how each selection target -affects the image processing pipeline inside the subdevice. - - -Types of selection targets --------------------------- - -There are two types of selection targets: actual and bounds. The actual -targets are the targets which configure the hardware. The BOUNDS target -will return a rectangle that contain all possible actual rectangles. - - -Discovering supported features ------------------------------- - -To discover which targets are supported, the user can perform -``VIDIOC_SUBDEV_G_SELECTION`` on them. Any unsupported target will -return ``EINVAL``. - -Selection targets and flags are documented in -:ref:`v4l2-selections-common`. - - -.. c:type:: v4l2_subdev_selection - -.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.7cm}| - -.. flat-table:: struct v4l2_subdev_selection - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``which`` - - Active or try selection, from enum - :ref:`v4l2_subdev_format_whence <v4l2-subdev-format-whence>`. - * - __u32 - - ``pad`` - - Pad number as reported by the media framework. - * - __u32 - - ``target`` - - Target selection rectangle. See :ref:`v4l2-selections-common`. - * - __u32 - - ``flags`` - - Flags. See :ref:`v4l2-selection-flags`. - * - struct :c:type:`v4l2_rect` - - ``r`` - - Selection rectangle, in pixels. - * - __u32 - - ``reserved``\ [8] - - Reserved for future extensions. Applications and drivers must set - the array to zero. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. - -EBUSY - The selection rectangle can't be changed because the pad is - currently busy. This can be caused, for instance, by an active video - stream on the pad. The ioctl must not be retried without performing - another action to fix the problem first. Only returned by - ``VIDIOC_SUBDEV_S_SELECTION`` - -EINVAL - The struct :c:type:`v4l2_subdev_selection` - ``pad`` references a non-existing pad, the ``which`` field - references a non-existing format, or the selection target is not - supported on the given subdev pad. diff --git a/Documentation/media/uapi/v4l/vidioc-subscribe-event.rst b/Documentation/media/uapi/v4l/vidioc-subscribe-event.rst deleted file mode 100644 index a2d3454555ba..000000000000 --- a/Documentation/media/uapi/v4l/vidioc-subscribe-event.rst +++ /dev/null @@ -1,123 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _VIDIOC_SUBSCRIBE_EVENT: -.. _VIDIOC_UNSUBSCRIBE_EVENT: - -****************************************************** -ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT -****************************************************** - -Name -==== - -VIDIOC_SUBSCRIBE_EVENT - VIDIOC_UNSUBSCRIBE_EVENT - Subscribe or unsubscribe event - - -Synopsis -======== - -.. c:function:: int ioctl( int fd, VIDIOC_SUBSCRIBE_EVENT, struct v4l2_event_subscription *argp ) - :name: VIDIOC_SUBSCRIBE_EVENT - -.. c:function:: int ioctl( int fd, VIDIOC_UNSUBSCRIBE_EVENT, struct v4l2_event_subscription *argp ) - :name: VIDIOC_UNSUBSCRIBE_EVENT - - -Arguments -========= - -``fd`` - File descriptor returned by :ref:`open() <func-open>`. - -``argp`` - Pointer to struct :c:type:`v4l2_event_subscription`. - - -Description -=========== - -Subscribe or unsubscribe V4L2 event. Subscribed events are dequeued by -using the :ref:`VIDIOC_DQEVENT` ioctl. - - -.. tabularcolumns:: |p{4.6cm}|p{4.4cm}|p{8.7cm}| - -.. c:type:: v4l2_event_subscription - -.. flat-table:: struct v4l2_event_subscription - :header-rows: 0 - :stub-columns: 0 - :widths: 1 1 2 - - * - __u32 - - ``type`` - - Type of the event, see :ref:`event-type`. - - .. note:: - - ``V4L2_EVENT_ALL`` can be used with - :ref:`VIDIOC_UNSUBSCRIBE_EVENT <VIDIOC_SUBSCRIBE_EVENT>` for - unsubscribing all events at once. - * - __u32 - - ``id`` - - ID of the event source. If there is no ID associated with the - event source, then set this to 0. Whether or not an event needs an - ID depends on the event type. - * - __u32 - - ``flags`` - - Event flags, see :ref:`event-flags`. - * - __u32 - - ``reserved``\ [5] - - Reserved for future extensions. Drivers and applications must set - the array to zero. - - - -.. tabularcolumns:: |p{6.8cm}|p{2.2cm}|p{8.5cm}| - -.. _event-flags: - -.. flat-table:: Event Flags - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * - ``V4L2_EVENT_SUB_FL_SEND_INITIAL`` - - 0x0001 - - When this event is subscribed an initial event will be sent - containing the current status. This only makes sense for events - that are triggered by a status change such as ``V4L2_EVENT_CTRL``. - Other events will ignore this flag. - * - ``V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK`` - - 0x0002 - - If set, then events directly caused by an ioctl will also be sent - to the filehandle that called that ioctl. For example, changing a - control using :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` will cause - a V4L2_EVENT_CTRL to be sent back to that same filehandle. - Normally such events are suppressed to prevent feedback loops - where an application changes a control to a one value and then - another, and then receives an event telling it that that control - has changed to the first value. - - Since it can't tell whether that event was caused by another - application or by the :ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` - call it is hard to decide whether to set the control to the value - in the event, or ignore it. - - Think carefully when you set this flag so you won't get into - situations like that. - - -Return Value -============ - -On success 0 is returned, on error -1 and the ``errno`` variable is set -appropriately. The generic error codes are described at the -:ref:`Generic Error Codes <gen-errors>` chapter. diff --git a/Documentation/media/uapi/v4l/yuv-formats.rst b/Documentation/media/uapi/v4l/yuv-formats.rst deleted file mode 100644 index 3b259e31b7a1..000000000000 --- a/Documentation/media/uapi/v4l/yuv-formats.rst +++ /dev/null @@ -1,64 +0,0 @@ -.. Permission is granted to copy, distribute and/or modify this -.. document under the terms of the GNU Free Documentation License, -.. Version 1.1 or any later version published by the Free Software -.. Foundation, with no Invariant Sections, no Front-Cover Texts -.. and no Back-Cover Texts. A copy of the license is included at -.. Documentation/media/uapi/fdl-appendix.rst. -.. -.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections - -.. _yuv-formats: - -*********** -YUV Formats -*********** - -YUV is the format native to TV broadcast and composite video signals. It -separates the brightness information (Y) from the color information (U -and V or Cb and Cr). The color information consists of red and blue -*color difference* signals, this way the green component can be -reconstructed by subtracting from the brightness component. See -:ref:`colorspaces` for conversion examples. YUV was chosen because -early television would only transmit brightness information. To add -color in a way compatible with existing receivers a new signal carrier -was added to transmit the color difference signals. Secondary in the YUV -format the U and V components usually have lower resolution than the Y -component. This is an analog video compression technique taking -advantage of a property of the human visual system, being more sensitive -to brightness information. - - -.. toctree:: - :maxdepth: 1 - - pixfmt-packed-yuv - pixfmt-grey - pixfmt-y10 - pixfmt-y12 - pixfmt-y14 - pixfmt-y10b - pixfmt-y10p - pixfmt-y16 - pixfmt-y16-be - pixfmt-y8i - pixfmt-y12i - pixfmt-uv8 - pixfmt-yuyv - pixfmt-uyvy - pixfmt-yvyu - pixfmt-vyuy - pixfmt-y41p - pixfmt-yuv420 - pixfmt-yuv420m - pixfmt-yuv422m - pixfmt-yuv444m - pixfmt-yuv410 - pixfmt-yuv422p - pixfmt-yuv411p - pixfmt-nv12 - pixfmt-nv12m - pixfmt-nv12mt - pixfmt-nv16 - pixfmt-nv16m - pixfmt-nv24 - pixfmt-m420 |
