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Diffstat (limited to 'Documentation/DocBook/v4l/vidioc-g-dv-preset.xml')
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1 files changed, 111 insertions, 0 deletions
diff --git a/Documentation/DocBook/v4l/vidioc-g-dv-preset.xml b/Documentation/DocBook/v4l/vidioc-g-dv-preset.xml new file mode 100644 index 000000000000..3c6784e132f3 --- /dev/null +++ b/Documentation/DocBook/v4l/vidioc-g-dv-preset.xml | |||
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1 | <refentry id="vidioc-g-dv-preset"> | ||
2 | <refmeta> | ||
3 | <refentrytitle>ioctl VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET</refentrytitle> | ||
4 | &manvol; | ||
5 | </refmeta> | ||
6 | |||
7 | <refnamediv> | ||
8 | <refname>VIDIOC_G_DV_PRESET</refname> | ||
9 | <refname>VIDIOC_S_DV_PRESET</refname> | ||
10 | <refpurpose>Query or select the DV preset of the current input or output</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-dv-preset; | ||
20 | *<parameter>argp</parameter></paramdef> | ||
21 | </funcprototype> | ||
22 | </funcsynopsis> | ||
23 | </refsynopsisdiv> | ||
24 | |||
25 | <refsect1> | ||
26 | <title>Arguments</title> | ||
27 | |||
28 | <variablelist> | ||
29 | <varlistentry> | ||
30 | <term><parameter>fd</parameter></term> | ||
31 | <listitem> | ||
32 | <para>&fd;</para> | ||
33 | </listitem> | ||
34 | </varlistentry> | ||
35 | <varlistentry> | ||
36 | <term><parameter>request</parameter></term> | ||
37 | <listitem> | ||
38 | <para>VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET</para> | ||
39 | </listitem> | ||
40 | </varlistentry> | ||
41 | <varlistentry> | ||
42 | <term><parameter>argp</parameter></term> | ||
43 | <listitem> | ||
44 | <para></para> | ||
45 | </listitem> | ||
46 | </varlistentry> | ||
47 | </variablelist> | ||
48 | </refsect1> | ||
49 | |||
50 | <refsect1> | ||
51 | <title>Description</title> | ||
52 | <para>To query and select the current DV preset, applications | ||
53 | use the <constant>VIDIOC_G_DV_PRESET</constant> and <constant>VIDIOC_S_DV_PRESET</constant> | ||
54 | ioctls which take a pointer to a &v4l2-dv-preset; type as argument. | ||
55 | Applications must zero the reserved array in &v4l2-dv-preset;. | ||
56 | <constant>VIDIOC_G_DV_PRESET</constant> returns a dv preset in the field | ||
57 | <structfield>preset</structfield> of &v4l2-dv-preset;.</para> | ||
58 | |||
59 | <para><constant>VIDIOC_S_DV_PRESET</constant> accepts a pointer to a &v4l2-dv-preset; | ||
60 | that has the preset value to be set. Applications must zero the reserved array in &v4l2-dv-preset;. | ||
61 | If the preset is not supported, it returns an &EINVAL; </para> | ||
62 | </refsect1> | ||
63 | |||
64 | <refsect1> | ||
65 | &return-value; | ||
66 | |||
67 | <variablelist> | ||
68 | <varlistentry> | ||
69 | <term><errorcode>EINVAL</errorcode></term> | ||
70 | <listitem> | ||
71 | <para>This ioctl is not supported, or the | ||
72 | <constant>VIDIOC_S_DV_PRESET</constant>,<constant>VIDIOC_S_DV_PRESET</constant> parameter was unsuitable.</para> | ||
73 | </listitem> | ||
74 | </varlistentry> | ||
75 | <varlistentry> | ||
76 | <term><errorcode>EBUSY</errorcode></term> | ||
77 | <listitem> | ||
78 | <para>The device is busy and therefore can not change the preset.</para> | ||
79 | </listitem> | ||
80 | </varlistentry> | ||
81 | </variablelist> | ||
82 | |||
83 | <table pgwide="1" frame="none" id="v4l2-dv-preset"> | ||
84 | <title>struct <structname>v4l2_dv_preset</structname></title> | ||
85 | <tgroup cols="3"> | ||
86 | &cs-str; | ||
87 | <tbody valign="top"> | ||
88 | <row> | ||
89 | <entry>__u32</entry> | ||
90 | <entry><structfield>preset</structfield></entry> | ||
91 | <entry>Preset value to represent the digital video timings</entry> | ||
92 | </row> | ||
93 | <row> | ||
94 | <entry>__u32</entry> | ||
95 | <entry><structfield>reserved[4]</structfield></entry> | ||
96 | <entry>Reserved fields for future use</entry> | ||
97 | </row> | ||
98 | </tbody> | ||
99 | </tgroup> | ||
100 | </table> | ||
101 | |||
102 | </refsect1> | ||
103 | </refentry> | ||
104 | |||
105 | <!-- | ||
106 | Local Variables: | ||
107 | mode: sgml | ||
108 | sgml-parent-document: "v4l2.sgml" | ||
109 | indent-tabs-mode: nil | ||
110 | End: | ||
111 | --> | ||