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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-27 06:32:31 -0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-07-28 20:08:19 -0300
commit43f71d93a0cb342f0c918fba3f6abb7661e40ad2 (patch)
treea1dc7288bc480e7027ca1827ca4876472fa12e40 /Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml
parentMerge tag 'media/v4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (diff)
downloadlinux-dev-43f71d93a0cb342f0c918fba3f6abb7661e40ad2.tar.xz
linux-dev-43f71d93a0cb342f0c918fba3f6abb7661e40ad2.zip
doc-rst: Remove the media docbook
Now that all media documentation was converted to Sphinx, we should get rid of the old DocBook one, as we don't want people to submit patches against the old stuff. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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- <refentry id="V4L2-PIX-FMT-YUV422P">
- <refmeta>
- <refentrytitle>V4L2_PIX_FMT_YUV422P ('422P')</refentrytitle>
- &manvol;
- </refmeta>
- <refnamediv>
- <refname><constant>V4L2_PIX_FMT_YUV422P</constant></refname>
- <refpurpose>Format with &frac12; horizontal chroma resolution,
-also known as YUV 4:2:2. Planar layout as opposed to
-<constant>V4L2_PIX_FMT_YUYV</constant></refpurpose>
- </refnamediv>
- <refsect1>
- <title>Description</title>
-
- <para>This format is not commonly used. This is a planar
-version of the YUYV 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. The Cb plane immediately follows the Y plane in
-memory. The Cb plane is half the width of the Y plane (and of the
-image). Each Cb belongs to two pixels. For example,
-Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
-Y'<subscript>01</subscript>. Following the Cb plane is the Cr plane,
-just like the Cb plane.</para>
-
- <para>If the Y plane has pad bytes after each row, then the Cr
-and Cb planes have half as many pad bytes after their rows. In other
-words, two Cx rows (including padding) is exactly as long as one Y row
-(including padding).</para>
-
- <example>
- <title><constant>V4L2_PIX_FMT_YUV422P</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>start&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>start&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>start&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>start&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>start&nbsp;+&nbsp;16:</entry>
- <entry>Cb<subscript>00</subscript></entry>
- <entry>Cb<subscript>01</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;18:</entry>
- <entry>Cb<subscript>10</subscript></entry>
- <entry>Cb<subscript>11</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;20:</entry>
- <entry>Cb<subscript>20</subscript></entry>
- <entry>Cb<subscript>21</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;22:</entry>
- <entry>Cb<subscript>30</subscript></entry>
- <entry>Cb<subscript>31</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;24:</entry>
- <entry>Cr<subscript>00</subscript></entry>
- <entry>Cr<subscript>01</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;26:</entry>
- <entry>Cr<subscript>10</subscript></entry>
- <entry>Cr<subscript>11</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;28:</entry>
- <entry>Cr<subscript>20</subscript></entry>
- <entry>Cr<subscript>21</subscript></entry>
- </row>
- <row>
- <entry>start&nbsp;+&nbsp;30:</entry>
- <entry>Cr<subscript>30</subscript></entry>
- <entry>Cr<subscript>31</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>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry>
- </row>
- <row>
- <entry>1</entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry>
- </row>
- <row>
- <entry>2</entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry>
- </row>
- <row>
- <entry>3</entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
- <entry>Y</entry><entry>C</entry><entry>Y</entry>
- </row>
- </tbody>
- </tgroup>
- </informaltable>
- </para>
- </formalpara>
- </example>
- </refsect1>
- </refentry>