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author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-09-22 19:49:27 -0400 |
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committer | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-09-22 19:49:27 -0400 |
commit | f056878332a91ed984a116bad4e7d49aefff9e6e (patch) | |
tree | 572f4757c8e7811d45e0be0c2ae529c78fb63441 /Documentation/DocBook/v4l/vidioc-g-jpegcomp.xml | |
parent | 3961f7c3cf247eee5df7fabadc7a40f2deeb98f3 (diff) | |
parent | 7fa07729e439a6184bd824746d06a49cca553f15 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
drivers/power/wm97xx_battery.c
Diffstat (limited to 'Documentation/DocBook/v4l/vidioc-g-jpegcomp.xml')
-rw-r--r-- | Documentation/DocBook/v4l/vidioc-g-jpegcomp.xml | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/Documentation/DocBook/v4l/vidioc-g-jpegcomp.xml b/Documentation/DocBook/v4l/vidioc-g-jpegcomp.xml new file mode 100644 index 000000000000..77394b287411 --- /dev/null +++ b/Documentation/DocBook/v4l/vidioc-g-jpegcomp.xml | |||
@@ -0,0 +1,180 @@ | |||
1 | <refentry id="vidioc-g-jpegcomp"> | ||
2 | <refmeta> | ||
3 | <refentrytitle>ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP</refentrytitle> | ||
4 | &manvol; | ||
5 | </refmeta> | ||
6 | |||
7 | <refnamediv> | ||
8 | <refname>VIDIOC_G_JPEGCOMP</refname> | ||
9 | <refname>VIDIOC_S_JPEGCOMP</refname> | ||
10 | <refpurpose></refpurpose> | ||
11 | </refnamediv> | ||
12 | |||
13 | <refsynopsisdiv> | ||
14 | <funcsynopsis> | ||
15 | <funcprototype> | ||
16 | <funcdef>int <function>ioctl</function></funcdef> | ||
17 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
18 | <paramdef>int <parameter>request</parameter></paramdef> | ||
19 | <paramdef>v4l2_jpegcompression *<parameter>argp</parameter></paramdef> | ||
20 | </funcprototype> | ||
21 | </funcsynopsis> | ||
22 | <funcsynopsis> | ||
23 | <funcprototype> | ||
24 | <funcdef>int <function>ioctl</function></funcdef> | ||
25 | <paramdef>int <parameter>fd</parameter></paramdef> | ||
26 | <paramdef>int <parameter>request</parameter></paramdef> | ||
27 | <paramdef>const v4l2_jpegcompression *<parameter>argp</parameter></paramdef> | ||
28 | </funcprototype> | ||
29 | </funcsynopsis> | ||
30 | </refsynopsisdiv> | ||
31 | |||
32 | <refsect1> | ||
33 | <title>Arguments</title> | ||
34 | |||
35 | <variablelist> | ||
36 | <varlistentry> | ||
37 | <term><parameter>fd</parameter></term> | ||
38 | <listitem> | ||
39 | <para>&fd;</para> | ||
40 | </listitem> | ||
41 | </varlistentry> | ||
42 | <varlistentry> | ||
43 | <term><parameter>request</parameter></term> | ||
44 | <listitem> | ||
45 | <para>VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP</para> | ||
46 | </listitem> | ||
47 | </varlistentry> | ||
48 | <varlistentry> | ||
49 | <term><parameter>argp</parameter></term> | ||
50 | <listitem> | ||
51 | <para></para> | ||
52 | </listitem> | ||
53 | </varlistentry> | ||
54 | </variablelist> | ||
55 | </refsect1> | ||
56 | |||
57 | <refsect1> | ||
58 | <title>Description</title> | ||
59 | |||
60 | <para>[to do]</para> | ||
61 | |||
62 | <para>Ronald Bultje elaborates:</para> | ||
63 | |||
64 | <!-- See video4linux-list@redhat.com on 16 Oct 2002, subject | ||
65 | "Re: [V4L] Re: v4l2 api / Zoran v4l2_jpegcompression" --> | ||
66 | |||
67 | <para>APP is some application-specific information. The | ||
68 | application can set it itself, and it'll be stored in the JPEG-encoded | ||
69 | fields (eg; interlacing information for in an AVI or so). COM is the | ||
70 | same, but it's comments, like 'encoded by me' or so.</para> | ||
71 | |||
72 | <para>jpeg_markers describes whether the huffman tables, | ||
73 | quantization tables and the restart interval information (all | ||
74 | JPEG-specific stuff) should be stored in the JPEG-encoded fields. | ||
75 | These define how the JPEG field is encoded. If you omit them, | ||
76 | applications assume you've used standard encoding. You usually do want | ||
77 | to add them.</para> | ||
78 | |||
79 | <!-- NB VIDIOC_S_JPEGCOMP is w/o. --> | ||
80 | |||
81 | <table pgwide="1" frame="none" id="v4l2-jpegcompression"> | ||
82 | <title>struct <structname>v4l2_jpegcompression</structname></title> | ||
83 | <tgroup cols="3"> | ||
84 | &cs-str; | ||
85 | <tbody valign="top"> | ||
86 | <row> | ||
87 | <entry>int</entry> | ||
88 | <entry><structfield>quality</structfield></entry> | ||
89 | <entry></entry> | ||
90 | </row> | ||
91 | <row> | ||
92 | <entry>int</entry> | ||
93 | <entry><structfield>APPn</structfield></entry> | ||
94 | <entry></entry> | ||
95 | </row> | ||
96 | <row> | ||
97 | <entry>int</entry> | ||
98 | <entry><structfield>APP_len</structfield></entry> | ||
99 | <entry></entry> | ||
100 | </row> | ||
101 | <row> | ||
102 | <entry>char</entry> | ||
103 | <entry><structfield>APP_data</structfield>[60]</entry> | ||
104 | <entry></entry> | ||
105 | </row> | ||
106 | <row> | ||
107 | <entry>int</entry> | ||
108 | <entry><structfield>COM_len</structfield></entry> | ||
109 | <entry></entry> | ||
110 | </row> | ||
111 | <row> | ||
112 | <entry>char</entry> | ||
113 | <entry><structfield>COM_data</structfield>[60]</entry> | ||
114 | <entry></entry> | ||
115 | </row> | ||
116 | <row> | ||
117 | <entry>__u32</entry> | ||
118 | <entry><structfield>jpeg_markers</structfield></entry> | ||
119 | <entry>See <xref linkend="jpeg-markers" />.</entry> | ||
120 | </row> | ||
121 | </tbody> | ||
122 | </tgroup> | ||
123 | </table> | ||
124 | |||
125 | <table pgwide="1" frame="none" id="jpeg-markers"> | ||
126 | <title>JPEG Markers Flags</title> | ||
127 | <tgroup cols="3"> | ||
128 | &cs-def; | ||
129 | <tbody valign="top"> | ||
130 | <row> | ||
131 | <entry><constant>V4L2_JPEG_MARKER_DHT</constant></entry> | ||
132 | <entry>(1<<3)</entry> | ||
133 | <entry>Define Huffman Tables</entry> | ||
134 | </row> | ||
135 | <row> | ||
136 | <entry><constant>V4L2_JPEG_MARKER_DQT</constant></entry> | ||
137 | <entry>(1<<4)</entry> | ||
138 | <entry>Define Quantization Tables</entry> | ||
139 | </row> | ||
140 | <row> | ||
141 | <entry><constant>V4L2_JPEG_MARKER_DRI</constant></entry> | ||
142 | <entry>(1<<5)</entry> | ||
143 | <entry>Define Restart Interval</entry> | ||
144 | </row> | ||
145 | <row> | ||
146 | <entry><constant>V4L2_JPEG_MARKER_COM</constant></entry> | ||
147 | <entry>(1<<6)</entry> | ||
148 | <entry>Comment segment</entry> | ||
149 | </row> | ||
150 | <row> | ||
151 | <entry><constant>V4L2_JPEG_MARKER_APP</constant></entry> | ||
152 | <entry>(1<<7)</entry> | ||
153 | <entry>App segment, driver will always use APP0</entry> | ||
154 | </row> | ||
155 | </tbody> | ||
156 | </tgroup> | ||
157 | </table> | ||
158 | </refsect1> | ||
159 | |||
160 | <refsect1> | ||
161 | &return-value; | ||
162 | |||
163 | <variablelist> | ||
164 | <varlistentry> | ||
165 | <term><errorcode>EINVAL</errorcode></term> | ||
166 | <listitem> | ||
167 | <para>This ioctl is not supported.</para> | ||
168 | </listitem> | ||
169 | </varlistentry> | ||
170 | </variablelist> | ||
171 | </refsect1> | ||
172 | </refentry> | ||
173 | |||
174 | <!-- | ||
175 | Local Variables: | ||
176 | mode: sgml | ||
177 | sgml-parent-document: "v4l2.sgml" | ||
178 | indent-tabs-mode: nil | ||
179 | End: | ||
180 | --> | ||