54f38fcae5
Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee38 ("docs: Create a user-space API guide").
As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.
Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
44 lines
1.3 KiB
ReStructuredText
44 lines
1.3 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/userspace-api/media/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _V4L2-PIX-FMT-Y12I:
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**************************
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V4L2_PIX_FMT_Y12I ('Y12I')
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**************************
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Interleaved grey-scale image, e.g. from a stereo-pair
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Description
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===========
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This is a grey-scale image with a depth of 12 bits per pixel, but with
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pixels from 2 sources interleaved and bit-packed. Each pixel is stored
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in a 24-bit word in the little-endian order. On a little-endian machine
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these pixels can be deinterlaced using
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.. code-block:: c
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__u8 *buf;
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left0 = 0xfff & *(__u16 *)buf;
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right0 = *(__u16 *)(buf + 1) >> 4;
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**Bit-packed representation.**
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pixels cross the byte boundary and have a ratio of 3 bytes for each
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interleaved pixel.
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - Y'\ :sub:`0left[7:0]`
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- Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]`
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- Y'\ :sub:`0right[11:4]`
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