OpenCloudOS-Kernel/Documentation/media/uapi/v4l/pixfmt-packed-yuv.rst

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

.. _packed-yuv:

******************
Packed YUV formats
******************

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

Similar to the packed RGB formats these formats store the Y, Cb and Cr
component of each pixel in one 16 or 32 bit word.

.. raw:: latex

    \newline\newline\begin{adjustbox}{width=\columnwidth}

.. _packed-yuv-formats:

.. tabularcolumns:: |p{4.5cm}|p{3.3cm}|p{0.7cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.2cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.2cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.2cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{1.7cm}|

.. flat-table:: Packed YUV Image Formats
    :header-rows:  2
    :stub-columns: 0

    * - Identifier
      - Code
      -
      - :cspan:`7` Byte 0 in memory
      -
      - :cspan:`7` Byte 1
      -
      - :cspan:`7` Byte 2
      -
      - :cspan:`7` Byte 3
    * -
      -
      - Bit
      - 7
      - 6
      - 5
      - 4
      - 3
      - 2
      - 1
      - 0
      -
      - 7
      - 6
      - 5
      - 4
      - 3
      - 2
      - 1
      - 0
      -
      - 7
      - 6
      - 5
      - 4
      - 3
      - 2
      - 1
      - 0
      -
      - 7
      - 6
      - 5
      - 4
      - 3
      - 2
      - 1
      - 0
    * .. _V4L2-PIX-FMT-YUV444:

      - ``V4L2_PIX_FMT_YUV444``
      - 'Y444'
      -
      - Cb\ :sub:`3`
      - Cb\ :sub:`2`
      - Cb\ :sub:`1`
      - Cb\ :sub:`0`
      - Cr\ :sub:`3`
      - Cr\ :sub:`2`
      - Cr\ :sub:`1`
      - Cr\ :sub:`0`
      -
      - a\ :sub:`3`
      - a\ :sub:`2`
      - a\ :sub:`1`
      - a\ :sub:`0`
      - Y'\ :sub:`3`
      - Y'\ :sub:`2`
      - Y'\ :sub:`1`
      - Y'\ :sub:`0`
    * .. _V4L2-PIX-FMT-YUV555:

      - ``V4L2_PIX_FMT_YUV555``
      - 'YUVO'
      -
      - Cb\ :sub:`2`
      - Cb\ :sub:`1`
      - Cb\ :sub:`0`
      - Cr\ :sub:`4`
      - Cr\ :sub:`3`
      - Cr\ :sub:`2`
      - Cr\ :sub:`1`
      - Cr\ :sub:`0`
      -
      - a
      - Y'\ :sub:`4`
      - Y'\ :sub:`3`
      - Y'\ :sub:`2`
      - Y'\ :sub:`1`
      - Y'\ :sub:`0`
      - Cb\ :sub:`4`
      - Cb\ :sub:`3`
    * .. _V4L2-PIX-FMT-YUV565:

      - ``V4L2_PIX_FMT_YUV565``
      - 'YUVP'
      -
      - Cb\ :sub:`2`
      - Cb\ :sub:`1`
      - Cb\ :sub:`0`
      - Cr\ :sub:`4`
      - Cr\ :sub:`3`
      - Cr\ :sub:`2`
      - Cr\ :sub:`1`
      - Cr\ :sub:`0`
      -
      - Y'\ :sub:`4`
      - Y'\ :sub:`3`
      - Y'\ :sub:`2`
      - Y'\ :sub:`1`
      - Y'\ :sub:`0`
      - Cb\ :sub:`5`
      - Cb\ :sub:`4`
      - Cb\ :sub:`3`
    * .. _V4L2-PIX-FMT-YUV32:

      - ``V4L2_PIX_FMT_YUV32``
      - 'YUV4'
      -
      - a\ :sub:`7`
      - a\ :sub:`6`
      - a\ :sub:`5`
      - a\ :sub:`4`
      - a\ :sub:`3`
      - a\ :sub:`2`
      - a\ :sub:`1`
      - a\ :sub:`0`
      -
      - Y'\ :sub:`7`
      - Y'\ :sub:`6`
      - Y'\ :sub:`5`
      - Y'\ :sub:`4`
      - Y'\ :sub:`3`
      - Y'\ :sub:`2`
      - Y'\ :sub:`1`
      - Y'\ :sub:`0`
      -
      - Cb\ :sub:`7`
      - Cb\ :sub:`6`
      - Cb\ :sub:`5`
      - Cb\ :sub:`4`
      - Cb\ :sub:`3`
      - Cb\ :sub:`2`
      - Cb\ :sub:`1`
      - Cb\ :sub:`0`
      -
      - Cr\ :sub:`7`
      - Cr\ :sub:`6`
      - Cr\ :sub:`5`
      - Cr\ :sub:`4`
      - Cr\ :sub:`3`
      - Cr\ :sub:`2`
      - Cr\ :sub:`1`
      - Cr\ :sub:`0`

.. raw:: latex

    \end{adjustbox}\newline\newline

.. note::

    #) Bit 7 is the most significant bit;

    #) The value of a = alpha bits is undefined when reading from the driver,
       ignored when writing to the driver, except when alpha blending has
       been negotiated for a :ref:`Video Overlay <overlay>` or
       :ref:`Video Output Overlay <osd>`.