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Fixed MTP to work with TWRP

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awab228 2018-06-19 23:16:04 +02:00
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Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml Normal file
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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>