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Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml deleted file mode 100644 index 9b3d42018b69..000000000000 --- a/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml +++ /dev/null @@ -1,128 +0,0 @@ -<refentry id="vidioc-enum-dv-timings"> - <refmeta> - <refentrytitle>ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_ENUM_DV_TIMINGS</refname> - <refname>VIDIOC_SUBDEV_ENUM_DV_TIMINGS</refname> - <refpurpose>Enumerate supported Digital Video timings</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>struct v4l2_enum_dv_timings *<parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Arguments</title> - - <variablelist> - <varlistentry> - <term><parameter>fd</parameter></term> - <listitem> - <para>&fd;</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>request</parameter></term> - <listitem> - <para>VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <para>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 &VIDIOC-DV-TIMINGS-CAP; to check if it also supports other -standards or even custom timings that are not in this list.</para> - - <para>To query the available timings, applications initialize the -<structfield>index</structfield> field, set the <structfield>pad</structfield> field to 0, -zero the reserved array of &v4l2-enum-dv-timings; and call the -<constant>VIDIOC_ENUM_DV_TIMINGS</constant> ioctl on a video node with a -pointer to this structure. Drivers fill the rest of the structure or return an -&EINVAL; 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 <errorcode>EINVAL</errorcode>. Note that drivers may enumerate a -different set of DV timings after switching the video input or -output.</para> - - <para>When implemented by the driver DV timings of subdevices can be queried -by calling the <constant>VIDIOC_SUBDEV_ENUM_DV_TIMINGS</constant> 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 &v4l2-enum-dv-timings; <structfield>pad</structfield> field. Attempts to -enumerate timings on a pad that doesn't support them will return an &EINVAL;.</para> - - <table pgwide="1" frame="none" id="v4l2-enum-dv-timings"> - <title>struct <structname>v4l2_enum_dv_timings</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>index</structfield></entry> - <entry>Number of the DV timings, set by the -application.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>pad</structfield></entry> - <entry>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.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[2]</entry> - <entry>Reserved for future extensions. Drivers and applications must - set the array to zero.</entry> - </row> - <row> - <entry>&v4l2-dv-timings;</entry> - <entry><structfield>timings</structfield></entry> - <entry>The timings.</entry> - </row> - </tbody> - </tgroup> - </table> - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>The &v4l2-enum-dv-timings; <structfield>index</structfield> -is out of bounds or the <structfield>pad</structfield> number is invalid.</para> - </listitem> - </varlistentry> - <varlistentry> - <term><errorcode>ENODATA</errorcode></term> - <listitem> - <para>Digital video presets are not supported for this input or output.</para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> |