Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[linux-2.6.git] / Documentation / DocBook / media / v4l / pixfmt-grey.xml
1     <refentry id="V4L2-PIX-FMT-GREY">
2       <refmeta>
3         <refentrytitle>V4L2_PIX_FMT_GREY ('GREY')</refentrytitle>
4         &manvol;
5       </refmeta>
6       <refnamediv>
7         <refname><constant>V4L2_PIX_FMT_GREY</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. It is really a degenerate
14 Y'CbCr format which simply contains no Cb or Cr data.</para>
15
16         <example>
17           <title><constant>V4L2_PIX_FMT_GREY</constant> 4 &times; 4
18 pixel image</title>
19
20           <formalpara>
21             <title>Byte Order.</title>
22             <para>Each cell is one byte.
23                 <informaltable frame="none">
24                 <tgroup cols="5" align="center">
25                   <colspec align="left" colwidth="2*" />
26                   <tbody valign="top">
27                     <row>
28                       <entry>start&nbsp;+&nbsp;0:</entry>
29                       <entry>Y'<subscript>00</subscript></entry>
30                       <entry>Y'<subscript>01</subscript></entry>
31                       <entry>Y'<subscript>02</subscript></entry>
32                       <entry>Y'<subscript>03</subscript></entry>
33                     </row>
34                     <row>
35                       <entry>start&nbsp;+&nbsp;4:</entry>
36                       <entry>Y'<subscript>10</subscript></entry>
37                       <entry>Y'<subscript>11</subscript></entry>
38                       <entry>Y'<subscript>12</subscript></entry>
39                       <entry>Y'<subscript>13</subscript></entry>
40                     </row>
41                     <row>
42                       <entry>start&nbsp;+&nbsp;8:</entry>
43                       <entry>Y'<subscript>20</subscript></entry>
44                       <entry>Y'<subscript>21</subscript></entry>
45                       <entry>Y'<subscript>22</subscript></entry>
46                       <entry>Y'<subscript>23</subscript></entry>
47                     </row>
48                     <row>
49                       <entry>start&nbsp;+&nbsp;12:</entry>
50                       <entry>Y'<subscript>30</subscript></entry>
51                       <entry>Y'<subscript>31</subscript></entry>
52                       <entry>Y'<subscript>32</subscript></entry>
53                       <entry>Y'<subscript>33</subscript></entry>
54                     </row>
55                   </tbody>
56                 </tgroup>
57                 </informaltable>
58               </para>
59           </formalpara>
60         </example>
61       </refsect1>
62     </refentry>