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Diffstat (limited to 'Documentation/DocBook/media/v4l/vidioc-g-audioout.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-g-audioout.xml | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-audioout.xml b/Documentation/DocBook/media/v4l/vidioc-g-audioout.xml deleted file mode 100644 index 200a2704a970..000000000000 --- a/Documentation/DocBook/media/v4l/vidioc-g-audioout.xml +++ /dev/null @@ -1,138 +0,0 @@ -<refentry id="vidioc-g-audioout"> - <refmeta> - <refentrytitle>ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT</refentrytitle> - &manvol; - </refmeta> - - <refnamediv> - <refname>VIDIOC_G_AUDOUT</refname> - <refname>VIDIOC_S_AUDOUT</refname> - <refpurpose>Query or select the current audio output</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>struct v4l2_audioout *<parameter>argp</parameter></paramdef> - </funcprototype> - </funcsynopsis> - <funcsynopsis> - <funcprototype> - <funcdef>int <function>ioctl</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>request</parameter></paramdef> - <paramdef>const struct v4l2_audioout *<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_G_AUDOUT, VIDIOC_S_AUDOUT</para> - </listitem> - </varlistentry> - <varlistentry> - <term><parameter>argp</parameter></term> - <listitem> - <para></para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> - - <refsect1> - <title>Description</title> - - <para>To query the current audio output applications zero out the -<structfield>reserved</structfield> array of a &v4l2-audioout; and -call the <constant>VIDIOC_G_AUDOUT</constant> ioctl with a pointer -to this structure. Drivers fill the rest of the structure or return an -&EINVAL; when the device has no audio inputs, or none which combine -with the current video output.</para> - - <para>Audio outputs have no writable properties. Nevertheless, to -select the current audio output applications can initialize the -<structfield>index</structfield> field and -<structfield>reserved</structfield> array (which in the future may -contain writable properties) of a -<structname>v4l2_audioout</structname> structure and call the -<constant>VIDIOC_S_AUDOUT</constant> ioctl. Drivers switch to the -requested output or return the &EINVAL; when the index is out of -bounds. This is a write-only ioctl, it does not return the current -audio output attributes as <constant>VIDIOC_G_AUDOUT</constant> -does.</para> - - <para>Note connectors on a TV card to loop back the received audio -signal to a sound card are not audio outputs in this sense.</para> - - <table pgwide="1" frame="none" id="v4l2-audioout"> - <title>struct <structname>v4l2_audioout</structname></title> - <tgroup cols="3"> - &cs-str; - <tbody valign="top"> - <row> - <entry>__u32</entry> - <entry><structfield>index</structfield></entry> - <entry>Identifies the audio output, set by the -driver or application.</entry> - </row> - <row> - <entry>__u8</entry> - <entry><structfield>name</structfield>[32]</entry> - <entry>Name of the audio output, a NUL-terminated ASCII -string, for example: "Line Out". This information is intended for the -user, preferably the connector label on the device itself.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>capability</structfield></entry> - <entry>Audio capability flags, none defined yet. Drivers -must set this field to zero.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>mode</structfield></entry> - <entry>Audio mode, none defined yet. Drivers and -applications (on <constant>VIDIOC_S_AUDOUT</constant>) must set this -field to zero.</entry> - </row> - <row> - <entry>__u32</entry> - <entry><structfield>reserved</structfield>[2]</entry> - <entry>Reserved for future extensions. Drivers and -applications must set the array to zero.</entry> - </row> - </tbody> - </tgroup> - </table> - </refsect1> - - <refsect1> - &return-value; - - <variablelist> - <varlistentry> - <term><errorcode>EINVAL</errorcode></term> - <listitem> - <para>No audio outputs combine with the current video -output, or the number of the selected audio output is out of bounds or -it does not combine.</para> - </listitem> - </varlistentry> - </variablelist> - </refsect1> -</refentry> |