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diff --git a/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst b/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst new file mode 100644 index 000000000000..b4752754337b --- /dev/null +++ b/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst @@ -0,0 +1,43 @@ +.. Permission is granted to copy, distribute and/or modify this +.. document under the terms of the GNU Free Documentation License, +.. Version 1.1 or any later version published by the Free Software +.. Foundation, with no Invariant Sections, no Front-Cover Texts +.. and no Back-Cover Texts. A copy of the license is included at +.. Documentation/userspace-api/media/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]` |