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+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-YUV422M"><constant>V4L2_PIX_FMT_YUV422M</constant></refname>
+ <refname id="V4L2-PIX-FMT-YVU422M"><constant>V4L2_PIX_FMT_YVU422M</constant></refname>
+ <refpurpose>Planar formats with &frac12; horizontal resolution, also
+ known as YUV and YVU 4:2:2</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_YUV422M</constant> the Cb data
+constitutes the second plane which 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>. The Cr data, just like the Cb plane, is
+in the third plane. </para>
+
+ <para><constant>V4L2_PIX_FMT_YVU422M</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 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>
+
+ <para><constant>V4L2_PIX_FMT_YUV422M</constant> and
+<constant>V4L2_PIX_FMT_YVU422M</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_YUV422M</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>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;2:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;4:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;6:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cb<subscript>31</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>
+ </row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;2:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;4:</entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;6:</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>