Merge branch 'for-3.3/drivers' of git://git.kernel.dk/linux-block
[linux-2.6.git] / Documentation / DocBook / media / v4l / pixfmt-sgbrg8.xml
1     <refentry id="V4L2-PIX-FMT-SGBRG8">
2       <refmeta>
3         <refentrytitle>V4L2_PIX_FMT_SGBRG8 ('GBRG')</refentrytitle>
4         &manvol;
5       </refmeta>
6       <refnamediv>
7         <refname><constant>V4L2_PIX_FMT_SGBRG8</constant></refname>
8         <refpurpose>Bayer RGB format</refpurpose>
9       </refnamediv>
10       <refsect1>
11         <title>Description</title>
12
13         <para>This is commonly the native format of digital cameras,
14 reflecting the arrangement of sensors on the CCD device. Only one red,
15 green or blue value is given for each pixel. Missing components must
16 be interpolated from neighbouring pixels. From left to right the first
17 row consists of a green and blue value, the second row of a red and
18 green value. This scheme repeats to the right and down for every two
19 columns and rows.</para>
20
21         <example>
22           <title><constant>V4L2_PIX_FMT_SGBRG8</constant> 4 &times; 4
23 pixel image</title>
24
25           <formalpara>
26             <title>Byte Order.</title>
27             <para>Each cell is one byte.
28               <informaltable frame="none">
29                 <tgroup cols="5" align="center">
30                   <colspec align="left" colwidth="2*" />
31                   <tbody valign="top">
32                     <row>
33                       <entry>start&nbsp;+&nbsp;0:</entry>
34                       <entry>G<subscript>00</subscript></entry>
35                       <entry>B<subscript>01</subscript></entry>
36                       <entry>G<subscript>02</subscript></entry>
37                       <entry>B<subscript>03</subscript></entry>
38                     </row>
39                     <row>
40                       <entry>start&nbsp;+&nbsp;4:</entry>
41                       <entry>R<subscript>10</subscript></entry>
42                       <entry>G<subscript>11</subscript></entry>
43                       <entry>R<subscript>12</subscript></entry>
44                       <entry>G<subscript>13</subscript></entry>
45                     </row>
46                     <row>
47                       <entry>start&nbsp;+&nbsp;8:</entry>
48                       <entry>G<subscript>20</subscript></entry>
49                       <entry>B<subscript>21</subscript></entry>
50                       <entry>G<subscript>22</subscript></entry>
51                       <entry>B<subscript>23</subscript></entry>
52                     </row>
53                     <row>
54                       <entry>start&nbsp;+&nbsp;12:</entry>
55                       <entry>R<subscript>30</subscript></entry>
56                       <entry>G<subscript>31</subscript></entry>
57                       <entry>R<subscript>32</subscript></entry>
58                       <entry>G<subscript>33</subscript></entry>
59                     </row>
60                   </tbody>
61                 </tgroup>
62               </informaltable>
63             </para>
64           </formalpara>
65         </example>
66       </refsect1>
67     </refentry>
68
69   <!--
70 Local Variables:
71 mode: sgml
72 sgml-parent-document: "pixfmt.sgml"
73 indent-tabs-mode: nil
74 End:
75   -->