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kernel/linux-rt-4.4.41/Documentation/DocBook/media/v4l/pixfmt-y12.xml 2.77 KB
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  <refentry id="V4L2-PIX-FMT-Y12">
    <refmeta>
      <refentrytitle>V4L2_PIX_FMT_Y12 ('Y12 ')</refentrytitle>
      &manvol;
    </refmeta>
    <refnamediv>
      <refname><constant>V4L2_PIX_FMT_Y12</constant></refname>
      <refpurpose>Grey-scale image</refpurpose>
    </refnamediv>
    <refsect1>
      <title>Description</title>
  
      <para>This is a grey-scale image with a depth of 12 bits per pixel. Pixels
  are stored in 16-bit words with unused high bits padded with 0. The least
  significant byte is stored at lower memory addresses (little-endian).</para>
  
      <example>
        <title><constant>V4L2_PIX_FMT_Y12</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>00low</subscript></entry>
  		  <entry>Y'<subscript>00high</subscript></entry>
  		  <entry>Y'<subscript>01low</subscript></entry>
  		  <entry>Y'<subscript>01high</subscript></entry>
  		  <entry>Y'<subscript>02low</subscript></entry>
  		  <entry>Y'<subscript>02high</subscript></entry>
  		  <entry>Y'<subscript>03low</subscript></entry>
  		  <entry>Y'<subscript>03high</subscript></entry>
  		</row>
  		<row>
  		  <entry>start&nbsp;+&nbsp;8:</entry>
  		  <entry>Y'<subscript>10low</subscript></entry>
  		  <entry>Y'<subscript>10high</subscript></entry>
  		  <entry>Y'<subscript>11low</subscript></entry>
  		  <entry>Y'<subscript>11high</subscript></entry>
  		  <entry>Y'<subscript>12low</subscript></entry>
  		  <entry>Y'<subscript>12high</subscript></entry>
  		  <entry>Y'<subscript>13low</subscript></entry>
  		  <entry>Y'<subscript>13high</subscript></entry>
  		</row>
  		<row>
  		  <entry>start&nbsp;+&nbsp;16:</entry>
  		  <entry>Y'<subscript>20low</subscript></entry>
  		  <entry>Y'<subscript>20high</subscript></entry>
  		  <entry>Y'<subscript>21low</subscript></entry>
  		  <entry>Y'<subscript>21high</subscript></entry>
  		  <entry>Y'<subscript>22low</subscript></entry>
  		  <entry>Y'<subscript>22high</subscript></entry>
  		  <entry>Y'<subscript>23low</subscript></entry>
  		  <entry>Y'<subscript>23high</subscript></entry>
  		</row>
  		<row>
  		  <entry>start&nbsp;+&nbsp;24:</entry>
  		  <entry>Y'<subscript>30low</subscript></entry>
  		  <entry>Y'<subscript>30high</subscript></entry>
  		  <entry>Y'<subscript>31low</subscript></entry>
  		  <entry>Y'<subscript>31high</subscript></entry>
  		  <entry>Y'<subscript>32low</subscript></entry>
  		  <entry>Y'<subscript>32high</subscript></entry>
  		  <entry>Y'<subscript>33low</subscript></entry>
  		  <entry>Y'<subscript>33high</subscript></entry>
  		</row>
  	      </tbody>
  	    </tgroup>
  	  </informaltable>
  	</para>
        </formalpara>
      </example>
    </refsect1>
  </refentry>