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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>
159 lines
2.9 KiB
ReStructuredText
159 lines
2.9 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-Y41P:
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**************************
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V4L2_PIX_FMT_Y41P ('Y41P')
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**************************
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Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1
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Description
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===========
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In this format each 12 bytes is eight pixels. In the twelve bytes are
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two CbCr pairs and eight Y's. The first CbCr pair goes with the first
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four Y's, and the second CbCr pair goes with the other four Y's. The Cb
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and Cr components have one fourth the horizontal resolution of the Y
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component.
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Do not confuse this format with
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:ref:`V4L2_PIX_FMT_YUV411P <V4L2-PIX-FMT-YUV411P>`. Y41P is derived
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from "YUV 4:1:1 *packed*", while YUV411P stands for "YUV 4:1:1
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*planar*".
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**Byte Order.**
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Each cell is one byte.
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - start + 0:
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- Cb\ :sub:`00`
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- Y'\ :sub:`00`
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- Cr\ :sub:`00`
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- Y'\ :sub:`01`
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- Cb\ :sub:`01`
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- Y'\ :sub:`02`
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- Cr\ :sub:`01`
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- Y'\ :sub:`03`
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- Y'\ :sub:`04`
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- Y'\ :sub:`05`
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- Y'\ :sub:`06`
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- Y'\ :sub:`07`
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* - start + 12:
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- Cb\ :sub:`10`
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- Y'\ :sub:`10`
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- Cr\ :sub:`10`
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- Y'\ :sub:`11`
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- Cb\ :sub:`11`
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- Y'\ :sub:`12`
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- Cr\ :sub:`11`
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- Y'\ :sub:`13`
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- Y'\ :sub:`14`
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- Y'\ :sub:`15`
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- Y'\ :sub:`16`
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- Y'\ :sub:`17`
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* - start + 24:
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- Cb\ :sub:`20`
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- Y'\ :sub:`20`
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- Cr\ :sub:`20`
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- Y'\ :sub:`21`
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- Cb\ :sub:`21`
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- Y'\ :sub:`22`
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- Cr\ :sub:`21`
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- Y'\ :sub:`23`
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- Y'\ :sub:`24`
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- Y'\ :sub:`25`
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- Y'\ :sub:`26`
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- Y'\ :sub:`27`
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* - start + 36:
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- Cb\ :sub:`30`
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- Y'\ :sub:`30`
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- Cr\ :sub:`30`
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- Y'\ :sub:`31`
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- Cb\ :sub:`31`
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- Y'\ :sub:`32`
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- Cr\ :sub:`31`
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- Y'\ :sub:`33`
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- Y'\ :sub:`34`
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- Y'\ :sub:`35`
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- Y'\ :sub:`36`
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- Y'\ :sub:`37`
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**Color Sample Location:**
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* -
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- 0
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- 1
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-
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- 2
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- 3
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- 4
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- 5
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-
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- 6
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* - 0
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- Y
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- Y
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- C
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- Y
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- Y
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- Y
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- Y
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- C
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- Y
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- Y
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* - 1
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- Y
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- Y
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- C
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- Y
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- Y
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- Y
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- Y
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- C
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- Y
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- Y
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* - 2
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- Y
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- Y
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- C
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- Y
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- Y
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- Y
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- Y
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- C
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- Y
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- Y
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* - 3
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- Y
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- Y
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- C
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- Y
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- Y
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- Y
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- Y
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- C
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- Y
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- Y
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