OpenCloudOS-Kernel/Documentation/media/uapi/v4l/pixfmt-yuv410.rst

.. -*- coding: utf-8; mode: rst -*-

.. _V4L2-PIX-FMT-YVU410:
.. _v4l2-pix-fmt-yuv410:

**********************************************************
V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')
**********************************************************


V4L2_PIX_FMT_YUV410
Planar formats with ¼ horizontal and vertical chroma resolution, also
known as YUV 4:1:0


Description
===========

These are planar formats, as opposed to a packed format. The three
components are separated into three sub-images or planes. The Y plane is
first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_YVU410``,
the Cr plane immediately follows the Y plane in memory. The Cr plane is
¼ the width and ¼ the height of the Y plane (and of the image). Each Cr
belongs to 16 pixels, a four-by-four square of the image. Following the
Cr plane is the Cb plane, just like the Cr plane.
``V4L2_PIX_FMT_YUV410`` is the same, except the Cb plane comes first,
then the Cr plane.

If the Y plane has pad bytes after each row, then the Cr and Cb planes
have ¼ as many pad bytes after their rows. In other words, four Cx rows
(including padding) are exactly as long as one Y row (including
padding).

**Byte Order.**
Each cell is one byte.




.. flat-table::
    :header-rows:  0
    :stub-columns: 0

    * - start + 0:
      - Y'\ :sub:`00`
      - Y'\ :sub:`01`
      - Y'\ :sub:`02`
      - Y'\ :sub:`03`
    * - start + 4:
      - Y'\ :sub:`10`
      - Y'\ :sub:`11`
      - Y'\ :sub:`12`
      - Y'\ :sub:`13`
    * - start + 8:
      - Y'\ :sub:`20`
      - Y'\ :sub:`21`
      - Y'\ :sub:`22`
      - Y'\ :sub:`23`
    * - start + 12:
      - Y'\ :sub:`30`
      - Y'\ :sub:`31`
      - Y'\ :sub:`32`
      - Y'\ :sub:`33`
    * - start + 16:
      - Cr\ :sub:`00`
    * - start + 17:
      - Cb\ :sub:`00`


**Color Sample Location..**



.. flat-table::
    :header-rows:  0
    :stub-columns: 0

    * -
      - 0
      -
      - 1
      -
      - 2
      -
      - 3
    * - 0
      - Y
      -
      - Y
      -
      - Y
      -
      - Y
    * -
    * - 1
      - Y
      -
      - Y
      -
      - Y
      -
      - Y
    * -
      -
      -
      -
      - C
      -
      -
      -
    * - 2
      - Y
      -
      - Y
      -
      - Y
      -
      - Y
    * -
    * - 3
      - Y
      -
      - Y
      -
      - Y
      -
      - Y