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Export audio filter documentation by Gustavo Sverzut Barbieri

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<gsbarbieri at yahoo.com.br>, cleaned up by me.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11367 b3059339-0415-0410-9bf9-f77b7e298cf2
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diego 2003-11-03 01:45:04 +00:00
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7
DOCS/man/en/mplayer.1
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@ -2024,6 +2024,13 @@ d: delay time in ms for the rear speakers (0ms to 1000ms) default is 15ms.
Delays the sound output.
Specify the delay separately for each channel in milliseconds (floating point
number between 0 and 1000).
.IPs export[=mmapped_file[:nsamples]]
Exports the incoming signal to other processes using memory mapping (mmap()).
.RSss
mmapped_file: File to map data to (default: ~/.mplayer/mplayer-af_export).
.br
nsamples: number of samples per channel (default: 512)
.REss
.RE
.
.TP

41
DOCS/xml/en/audio.xml
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@ -942,6 +942,47 @@ would add surround sound decoding with 15ms delay for the sound to the
rear speakers.
</para>
</sect4>
<sect4 id="af_export">
<title>Audio Exporter</title>
<para>
This audio filter exports the incoming signal to other processes using memory
mapping (<literal>mmap()</literal>). Memory mapped areas contain a header:
<programlisting>
int nch /*number of channels*/
int size /*buffer size*/
unsigned long long counter /*Used to keep sync, it's updated
every time new data is exported.*/
</programlisting>
The rest is payload (non-interleaved) 16bit data.
</para>
<variablelist>
<varlistentry>
<term><option>mmapped_file</option></term>
<listitem><para>
The file you want this filter to export to. The default is to map to
<filename>~/.mplayer/mplayer-af_export</filename>.
</para></listitem>
</varlistentry>
<varlistentry>
<term><option>nsamples</option></term>
<listitem><para>
Number of samples per channel. The default is <literal>512</literal> samples.
</para></listitem>
</varlistentry>
</variablelist>
<para>
Example:
<screen>mplayer -af export=/tmp/mplayer-af_export:1024 media.avi</screen>
would export 1024 samples per channel to <filename>/tmp/mplayer-af_export</filename>.
</para>
</sect4>
</sect3>
<sect3 id="audio-plugins">