Documentation/DocBook/media/v4l/pixfmt-y12.xml

   1 <refentry id="V4L2-PIX-FMT-Y12">
   2   <refmeta>
   3     <refentrytitle>V4L2_PIX_FMT_Y12 ('Y12 ')</refentrytitle>
   4     &manvol;
   5   </refmeta>
   6   <refnamediv>
   7     <refname><constant>V4L2_PIX_FMT_Y12</constant></refname>
   8     <refpurpose>Grey-scale image</refpurpose>
   9   </refnamediv>
  10   <refsect1>
  11     <title>Description</title>
  12
  13     <para>This is a grey-scale image with a depth of 12 bits per pixel. Pixels
  14 are stored in 16-bit words with unused high bits padded with 0. The least
  15 significant byte is stored at lower memory addresses (little-endian).</para>
  16
  17     <example>
  18       <title><constant>V4L2_PIX_FMT_Y12</constant> 4 &times; 4
  19 pixel image</title>
  20
  21       <formalpara>
  22         <title>Byte Order.</title>
  23         <para>Each cell is one byte.
  24           <informaltable frame="none">
  25             <tgroup cols="9" align="center">
  26               <colspec align="left" colwidth="2*" />
  27               <tbody valign="top">
  28                 <row>
  29                   <entry>start&nbsp;+&nbsp;0:</entry>
  30                   <entry>Y'<subscript>00low</subscript></entry>
  31                   <entry>Y'<subscript>00high</subscript></entry>
  32                   <entry>Y'<subscript>01low</subscript></entry>
  33                   <entry>Y'<subscript>01high</subscript></entry>
  34                   <entry>Y'<subscript>02low</subscript></entry>
  35                   <entry>Y'<subscript>02high</subscript></entry>
  36                   <entry>Y'<subscript>03low</subscript></entry>
  37                   <entry>Y'<subscript>03high</subscript></entry>
  38                 </row>
  39                 <row>
  40                   <entry>start&nbsp;+&nbsp;8:</entry>
  41                   <entry>Y'<subscript>10low</subscript></entry>
  42                   <entry>Y'<subscript>10high</subscript></entry>
  43                   <entry>Y'<subscript>11low</subscript></entry>
  44                   <entry>Y'<subscript>11high</subscript></entry>
  45                   <entry>Y'<subscript>12low</subscript></entry>
  46                   <entry>Y'<subscript>12high</subscript></entry>
  47                   <entry>Y'<subscript>13low</subscript></entry>
  48                   <entry>Y'<subscript>13high</subscript></entry>
  49                 </row>
  50                 <row>
  51                   <entry>start&nbsp;+&nbsp;16:</entry>
  52                   <entry>Y'<subscript>20low</subscript></entry>
  53                   <entry>Y'<subscript>20high</subscript></entry>
  54                   <entry>Y'<subscript>21low</subscript></entry>
  55                   <entry>Y'<subscript>21high</subscript></entry>
  56                   <entry>Y'<subscript>22low</subscript></entry>
  57                   <entry>Y'<subscript>22high</subscript></entry>
  58                   <entry>Y'<subscript>23low</subscript></entry>
  59                   <entry>Y'<subscript>23high</subscript></entry>
  60                 </row>
  61                 <row>
  62                   <entry>start&nbsp;+&nbsp;24:</entry>
  63                   <entry>Y'<subscript>30low</subscript></entry>
  64                   <entry>Y'<subscript>30high</subscript></entry>
  65                   <entry>Y'<subscript>31low</subscript></entry>
  66                   <entry>Y'<subscript>31high</subscript></entry>
  67                   <entry>Y'<subscript>32low</subscript></entry>
  68                   <entry>Y'<subscript>32high</subscript></entry>
  69                   <entry>Y'<subscript>33low</subscript></entry>
  70                   <entry>Y'<subscript>33high</subscript></entry>
  71                 </row>
  72               </tbody>
  73             </tgroup>
  74           </informaltable>
  75         </para>
  76       </formalpara>
  77     </example>
  78   </refsect1>
  79 </refentry>