128 lines
2.3 KiB
ReStructuredText
Executable file
128 lines
2.3 KiB
ReStructuredText
Executable file
.. -*- coding: utf-8; mode: rst -*-
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.. _V4L2-PIX-FMT-YVU410:
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.. _v4l2-pix-fmt-yuv410:
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**********************************************************
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V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')
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**********************************************************
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V4L2_PIX_FMT_YUV410
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Planar formats with ¼ horizontal and vertical chroma resolution, also
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known as YUV 4:1:0
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Description
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===========
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These are planar formats, as opposed to a packed format. The three
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components are separated into three sub-images or planes. The Y plane is
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first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_YVU410``,
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the Cr plane immediately follows the Y plane in memory. The Cr plane is
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¼ the width and ¼ the height of the Y plane (and of the image). Each Cr
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belongs to 16 pixels, a four-by-four square of the image. Following the
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Cr plane is the Cb plane, just like the Cr plane.
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``V4L2_PIX_FMT_YUV410`` is the same, except the Cb plane comes first,
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then the Cr plane.
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If the Y plane has pad bytes after each row, then the Cr and Cb planes
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have ¼ as many pad bytes after their rows. In other words, four Cx rows
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(including padding) are exactly as long as one Y row (including
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padding).
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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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- Y'\ :sub:`00`
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- Y'\ :sub:`01`
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- Y'\ :sub:`02`
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- Y'\ :sub:`03`
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* - start + 4:
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- Y'\ :sub:`10`
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- Y'\ :sub:`11`
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- Y'\ :sub:`12`
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- Y'\ :sub:`13`
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* - start + 8:
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- Y'\ :sub:`20`
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- Y'\ :sub:`21`
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- Y'\ :sub:`22`
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- Y'\ :sub:`23`
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* - start + 12:
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- Y'\ :sub:`30`
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- Y'\ :sub:`31`
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- Y'\ :sub:`32`
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- Y'\ :sub:`33`
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* - start + 16:
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- Cr\ :sub:`00`
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* - start + 17:
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- Cb\ :sub:`00`
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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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-
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- 1
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- 2
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- 3
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* - 0
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- Y
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- Y
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- Y
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- Y
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* -
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* - 1
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- Y
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- Y
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- Y
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- Y
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* -
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- C
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* - 2
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- Y
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- Y
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- Y
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- Y
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* -
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* - 3
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- Y
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-
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- Y
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-
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- Y
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-
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- Y
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