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linux/Documentation/DocBook/media/v4l/pixfmt-yuv444m.xml
Laurent Pinchart d65fae92f9 [media] v4l: Add YUV 4:2:2 and YUV 4:4:4 tri-planar non-contiguous formats 
The formats use three planes through the multiplanar API, allowing for
non-contiguous planes in memory.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2016-02-19 08:10:37 -02:00

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<refentry>
<refmeta>
<refentrytitle>V4L2_PIX_FMT_YUV444M ('YM24'), V4L2_PIX_FMT_YVU444M ('YM42')</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname id="V4L2-PIX-FMT-YUV444M"><constant>V4L2_PIX_FMT_YUV444M</constant></refname>
<refname id="V4L2-PIX-FMT-YVU444M"><constant>V4L2_PIX_FMT_YVU444M</constant></refname>
<refpurpose>Planar formats with full horizontal resolution, also
known as YUV and YVU 4:4:4</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>This is a multi-planar format, as opposed to a packed format.
The three components are separated into three sub-images or planes.</para>
<para>The Y plane is first. The Y plane has one byte per pixel.
For <constant>V4L2_PIX_FMT_YUV444M</constant> 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.
</para>
<para><constant>V4L2_PIX_FMT_YVU444M</constant> is the same except
the Cr data is stored in the second plane and the Cb data in the third plane.
</para>
<para>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.</para>
<para><constant>V4L2_PIX_FMT_YUV444M</constant> and
<constant>V4L2_PIX_FMT_YUV444M</constant> are intended to be
used only in drivers and applications that support the multi-planar API,
described in <xref linkend="planar-apis"/>. </para>
<example>
<title><constant>V4L2_PIX_FMT_YUV444M</constant> 4 &times; 4
pixel image</title>
<formalpara>
<title>Byte Order.</title>
<para>Each cell is one byte.
<informaltable frame="none">
<tgroup cols="5" align="center">
<colspec align="left" colwidth="2*" />
<tbody valign="top">
<row>
<entry>start0&nbsp;+&nbsp;0:</entry>
<entry>Y'<subscript>00</subscript></entry>
<entry>Y'<subscript>01</subscript></entry>
<entry>Y'<subscript>02</subscript></entry>
<entry>Y'<subscript>03</subscript></entry>
</row>
<row>
<entry>start0&nbsp;+&nbsp;4:</entry>
<entry>Y'<subscript>10</subscript></entry>
<entry>Y'<subscript>11</subscript></entry>
<entry>Y'<subscript>12</subscript></entry>
<entry>Y'<subscript>13</subscript></entry>
</row>
<row>
<entry>start0&nbsp;+&nbsp;8:</entry>
<entry>Y'<subscript>20</subscript></entry>
<entry>Y'<subscript>21</subscript></entry>
<entry>Y'<subscript>22</subscript></entry>
<entry>Y'<subscript>23</subscript></entry>
</row>
<row>
<entry>start0&nbsp;+&nbsp;12:</entry>
<entry>Y'<subscript>30</subscript></entry>
<entry>Y'<subscript>31</subscript></entry>
<entry>Y'<subscript>32</subscript></entry>
<entry>Y'<subscript>33</subscript></entry>
</row>
<row><entry></entry></row>
<row>
<entry>start1&nbsp;+&nbsp;0:</entry>
<entry>Cb<subscript>00</subscript></entry>
<entry>Cb<subscript>01</subscript></entry>
<entry>Cb<subscript>02</subscript></entry>
<entry>Cb<subscript>03</subscript></entry>
</row>
<row>
<entry>start1&nbsp;+&nbsp;4:</entry>
<entry>Cb<subscript>10</subscript></entry>
<entry>Cb<subscript>11</subscript></entry>
<entry>Cb<subscript>12</subscript></entry>
<entry>Cb<subscript>13</subscript></entry>
</row>
<row>
<entry>start1&nbsp;+&nbsp;8:</entry>
<entry>Cb<subscript>20</subscript></entry>
<entry>Cb<subscript>21</subscript></entry>
<entry>Cb<subscript>22</subscript></entry>
<entry>Cb<subscript>23</subscript></entry>
</row>
<row>
<entry>start1&nbsp;+&nbsp;12:</entry>
<entry>Cb<subscript>20</subscript></entry>
<entry>Cb<subscript>21</subscript></entry>
<entry>Cb<subscript>32</subscript></entry>
<entry>Cb<subscript>33</subscript></entry>
</row>
<row><entry></entry></row>
<row>
<entry>start2&nbsp;+&nbsp;0:</entry>
<entry>Cr<subscript>00</subscript></entry>
<entry>Cr<subscript>01</subscript></entry>
<entry>Cr<subscript>02</subscript></entry>
<entry>Cr<subscript>03</subscript></entry>
</row>
<row>
<entry>start2&nbsp;+&nbsp;4:</entry>
<entry>Cr<subscript>10</subscript></entry>
<entry>Cr<subscript>11</subscript></entry>
<entry>Cr<subscript>12</subscript></entry>
<entry>Cr<subscript>13</subscript></entry>
</row>
<row>
<entry>start2&nbsp;+&nbsp;8:</entry>
<entry>Cr<subscript>20</subscript></entry>
<entry>Cr<subscript>21</subscript></entry>
<entry>Cr<subscript>22</subscript></entry>
<entry>Cr<subscript>23</subscript></entry>
</row>
<row>
<entry>start2&nbsp;+&nbsp;12:</entry>
<entry>Cr<subscript>30</subscript></entry>
<entry>Cr<subscript>31</subscript></entry>
<entry>Cr<subscript>32</subscript></entry>
<entry>Cr<subscript>33</subscript></entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</formalpara>
<formalpara>
<title>Color Sample Location.</title>
<para>
<informaltable frame="none">
<tgroup cols="7" align="center">
<tbody valign="top">
<row>
<entry></entry>
<entry>0</entry><entry></entry><entry>1</entry><entry></entry>
<entry>2</entry><entry></entry><entry>3</entry>
</row>
<row>
<entry>0</entry>
<entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>
<entry>YC</entry><entry></entry><entry>YC</entry>
</row>
<row>
<entry>1</entry>
<entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>
<entry>YC</entry><entry></entry><entry>YC</entry>
</row>
<row>
<entry>2</entry>
<entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>
<entry>YC</entry><entry></entry><entry>YC</entry>
</row>
<row>
<entry>3</entry>
<entry>YC</entry><entry></entry><entry>YC</entry><entry></entry>
<entry>YC</entry><entry></entry><entry>YC</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</formalpara>
</example>
</refsect1>
</refentry>
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