mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 18:26:41 +07:00
8e080c2e6c
The V4L and DVB API's are there for a long time. however, up to now, no efforts were done to merge them to kernel DocBook. This patch adds the current versions of the specs as an unique compendium. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
90 lines
2.3 KiB
XML
90 lines
2.3 KiB
XML
<refentry id="vidioc-enumaudioout">
|
|
<refmeta>
|
|
<refentrytitle>ioctl VIDIOC_ENUMAUDOUT</refentrytitle>
|
|
&manvol;
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>VIDIOC_ENUMAUDOUT</refname>
|
|
<refpurpose>Enumerate audio outputs</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>
|
|
</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_ENUMAUDOUT</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>argp</parameter></term>
|
|
<listitem>
|
|
<para></para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>To query the attributes of an audio output applications
|
|
initialize the <structfield>index</structfield> field and 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 index is out of bounds. To enumerate all audio
|
|
outputs applications shall begin at index zero, incrementing by one
|
|
until the driver returns <errorcode>EINVAL</errorcode>.</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>
|
|
|
|
<para>See <xref linkend="vidioc-g-audioout" /> for a description of
|
|
&v4l2-audioout;.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
&return-value;
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><errorcode>EINVAL</errorcode></term>
|
|
<listitem>
|
|
<para>The number of the audio output is out of bounds, or
|
|
there are no audio outputs at all and 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:
|
|
-->
|