Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / DocBook / media / v4l / pixfmt-nv24.xml

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+    <refentry>
+      <refmeta>
+       <refentrytitle>V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')</refentrytitle>
+       &manvol;
+      </refmeta>
+      <refnamediv>
+       <refname id="V4L2-PIX-FMT-NV24"><constant>V4L2_PIX_FMT_NV24</constant></refname>
+       <refname id="V4L2-PIX-FMT-NV42"><constant>V4L2_PIX_FMT_NV42</constant></refname>
+       <refpurpose>Formats with full horizontal and vertical
+chroma resolutions, also known as YUV 4:4:4. One luminance and one
+chrominance plane with alternating chroma samples as opposed to
+<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose>
+      </refnamediv>
+      <refsect1>
+       <title>Description</title>
+
+       <para>These are two-plane versions of the YUV 4:4:4 format. The three
+       components are separated into two sub-images or planes. The Y plane is
+       first, with each Y sample stored in one byte per pixel. For
+       <constant>V4L2_PIX_FMT_NV24</constant>, a combined CbCr plane
+       immediately follows the Y plane in memory. The CbCr plane has the same
+       width and height, in pixels, as the Y plane (and the image). Each line
+       contains one CbCr pair per pixel, with each Cb and Cr sample stored in
+       one byte. <constant>V4L2_PIX_FMT_NV42</constant> is the same except that
+       the Cb and Cr samples are swapped, the CrCb plane starts with a Cr
+       sample.</para>
+
+       <para>If the Y plane has pad bytes after each row, then the CbCr plane
+       has twice as many pad bytes after its rows.</para>
+
+       <example>
+         <title><constant>V4L2_PIX_FMT_NV24</constant> 4 &times; 4
+pixel image</title>
+
+         <formalpara>
+           <title>Byte Order.</title>
+           <para>Each cell is one byte.
+               <informaltable frame="none">
+               <tgroup cols="9" 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>Cr<subscript>00</subscript></entry>
+                     <entry>Cb<subscript>01</subscript></entry>
+                     <entry>Cr<subscript>01</subscript></entry>
+                     <entry>Cb<subscript>02</subscript></entry>
+                     <entry>Cr<subscript>02</subscript></entry>
+                     <entry>Cb<subscript>03</subscript></entry>
+                     <entry>Cr<subscript>03</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start&nbsp;+&nbsp;24:</entry>
+                     <entry>Cb<subscript>10</subscript></entry>
+                     <entry>Cr<subscript>10</subscript></entry>
+                     <entry>Cb<subscript>11</subscript></entry>
+                     <entry>Cr<subscript>11</subscript></entry>
+                     <entry>Cb<subscript>12</subscript></entry>
+                     <entry>Cr<subscript>12</subscript></entry>
+                     <entry>Cb<subscript>13</subscript></entry>
+                     <entry>Cr<subscript>13</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start&nbsp;+&nbsp;32:</entry>
+                     <entry>Cb<subscript>20</subscript></entry>
+                     <entry>Cr<subscript>20</subscript></entry>
+                     <entry>Cb<subscript>21</subscript></entry>
+                     <entry>Cr<subscript>21</subscript></entry>
+                     <entry>Cb<subscript>22</subscript></entry>
+                     <entry>Cr<subscript>22</subscript></entry>
+                     <entry>Cb<subscript>23</subscript></entry>
+                     <entry>Cr<subscript>23</subscript></entry>
+                   </row>
+                   <row>
+                     <entry>start&nbsp;+&nbsp;40:</entry>
+                     <entry>Cb<subscript>30</subscript></entry>
+                     <entry>Cr<subscript>30</subscript></entry>
+                     <entry>Cb<subscript>31</subscript></entry>
+                     <entry>Cr<subscript>31</subscript></entry>
+                     <entry>Cb<subscript>32</subscript></entry>
+                     <entry>Cr<subscript>32</subscript></entry>
+                     <entry>Cb<subscript>33</subscript></entry>
+                     <entry>Cr<subscript>33</subscript></entry>
+                   </row>
+                 </tbody>
+               </tgroup>
+               </informaltable>
+             </para>
+         </formalpara>
+       </example>
+      </refsect1>
+    </refentry>