xref: /kernel/linux/linux-5.10/Documentation/userspace-api/media/v4l/pixfmt-yuv444m.rst

.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later

.. _V4L2-PIX-FMT-YUV444M:
.. _v4l2-pix-fmt-yvu444m:

************************************************************
V4L2_PIX_FMT_YUV444M ('YM24'), V4L2_PIX_FMT_YVU444M ('YM42')
************************************************************


V4L2_PIX_FMT_YVU444M
Planar formats with full horizontal resolution, also known as YUV and
YVU 4:4:4


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

This is a multi-planar format, 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_YUV444M`` the Cb data constitutes the second plane which
is the same width and height as the Y plane (and as the image). The Cr
data, just like the Cb plane, is in the third plane.

``V4L2_PIX_FMT_YVU444M`` is the same except the Cr data is stored in the
second plane and the Cb data in the third plane.

If the Y plane has pad bytes after each row, then the Cb and Cr planes
have the same number of pad bytes after their rows.

``V4L2_PIX_FMT_YUV444M`` and ``V4L2_PIX_FMT_YUV444M`` are intended to be
used only in drivers and applications that support the multi-planar API,
described in :ref:`planar-apis`.

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


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

    * - start0 + 0:
      - Y'\ :sub:`00`
      - Y'\ :sub:`01`
      - Y'\ :sub:`02`
      - Y'\ :sub:`03`
    * - start0 + 4:
      - Y'\ :sub:`10`
      - Y'\ :sub:`11`
      - Y'\ :sub:`12`
      - Y'\ :sub:`13`
    * - start0 + 8:
      - Y'\ :sub:`20`
      - Y'\ :sub:`21`
      - Y'\ :sub:`22`
      - Y'\ :sub:`23`
    * - start0 + 12:
      - Y'\ :sub:`30`
      - Y'\ :sub:`31`
      - Y'\ :sub:`32`
      - Y'\ :sub:`33`
    * -
    * - start1 + 0:
      - Cb\ :sub:`00`
      - Cb\ :sub:`01`
      - Cb\ :sub:`02`
      - Cb\ :sub:`03`
    * - start1 + 4:
      - Cb\ :sub:`10`
      - Cb\ :sub:`11`
      - Cb\ :sub:`12`
      - Cb\ :sub:`13`
    * - start1 + 8:
      - Cb\ :sub:`20`
      - Cb\ :sub:`21`
      - Cb\ :sub:`22`
      - Cb\ :sub:`23`
    * - start1 + 12:
      - Cb\ :sub:`20`
      - Cb\ :sub:`21`
      - Cb\ :sub:`32`
      - Cb\ :sub:`33`
    * -
    * - start2 + 0:
      - Cr\ :sub:`00`
      - Cr\ :sub:`01`
      - Cr\ :sub:`02`
      - Cr\ :sub:`03`
    * - start2 + 4:
      - Cr\ :sub:`10`
      - Cr\ :sub:`11`
      - Cr\ :sub:`12`
      - Cr\ :sub:`13`
    * - start2 + 8:
      - Cr\ :sub:`20`
      - Cr\ :sub:`21`
      - Cr\ :sub:`22`
      - Cr\ :sub:`23`
    * - start2 + 12:
      - Cr\ :sub:`30`
      - Cr\ :sub:`31`
      - Cr\ :sub:`32`
      - Cr\ :sub:`33`


**Color Sample Location:**



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

    * -
      - 0
      - 1
      - 2
      - 3
    * - 0
      - YC
      - YC
      - YC
      - YC
    * - 1
      - YC
      - YC
      - YC
      - YC
    * - 2
      - YC
      - YC
      - YC
      - YC
    * - 3
      - YC
      - YC
      - YC
      - YC