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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-17 10:06:23 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-09-17 10:06:23 -0300 |
| commit | 47a1368908d1a5cd3548d44cfa19853c26ddfeaf (patch) | |
| tree | 3f6e533e608f3158b37980e1dbbafea627f3b47a /linux/Documentation/DocBook/v4l/vidioc-querystd.xml | |
| parent | aeb3a788273d65fa47c79635a886bcafc7970807 (diff) | |
| parent | f8c7dcdb0142ecb0a9634945df8bd9b26522f5b7 (diff) | |
| download | mediapointer-dvb-s2-47a1368908d1a5cd3548d44cfa19853c26ddfeaf.tar.gz mediapointer-dvb-s2-47a1368908d1a5cd3548d44cfa19853c26ddfeaf.tar.bz2 | |
merge: http://www.linuxtv.org/hg/~hverkuil/v4l-dvb
From: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'linux/Documentation/DocBook/v4l/vidioc-querystd.xml')
| -rw-r--r-- | linux/Documentation/DocBook/v4l/vidioc-querystd.xml | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/linux/Documentation/DocBook/v4l/vidioc-querystd.xml b/linux/Documentation/DocBook/v4l/vidioc-querystd.xml new file mode 100644 index 000000000..b5a7ff934 --- /dev/null +++ b/linux/Documentation/DocBook/v4l/vidioc-querystd.xml @@ -0,0 +1,83 @@ +<refentry id="vidioc-querystd"> + <refmeta> + <refentrytitle>ioctl VIDIOC_QUERYSTD</refentrytitle> + &manvol; + </refmeta> + + <refnamediv> + <refname>VIDIOC_QUERYSTD</refname> + <refpurpose>Sense the video standard received by the current +input</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcprototype> + <funcdef>int <function>ioctl</function></funcdef> + <paramdef>int <parameter>fd</parameter></paramdef> + <paramdef>int <parameter>request</parameter></paramdef> + <paramdef>v4l2_std_id *<parameter>argp</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Arguments</title> + + <variablelist> + <varlistentry> + <term><parameter>fd</parameter></term> + <listitem> + <para>&fd;</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>request</parameter></term> + <listitem> + <para>VIDIOC_QUERYSTD</para> + </listitem> + </varlistentry> + <varlistentry> + <term><parameter>argp</parameter></term> + <listitem> + <para></para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Description</title> + + <para>The hardware may be able to detect the current video +standard automatically. To do so, applications call <constant> +VIDIOC_QUERYSTD</constant> with a pointer to a &v4l2-std-id; type. The +driver stores here a set of candidates, this can be a single flag or a +set of supported standards if for example the hardware can only +distinguish between 50 and 60 Hz systems. When detection is not +possible or fails, the set must contain all standards supported by the +current video input or output.</para> + + </refsect1> + + <refsect1> + &return-value; + + <variablelist> + <varlistentry> + <term><errorcode>EINVAL</errorcode></term> + <listitem> + <para>This ioctl is not supported.</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> +</refentry> + +<!-- +Local Variables: +mode: sgml +sgml-parent-document: "v4l2.sgml" +indent-tabs-mode: nil +End: +--> |