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<hr><h1>pcm_route.c File Reference</h1>PCM Route & Volume Plugin Interface.
<a href="#_details">More...</a>
<p>
<table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Functions</h2></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="pcm__route_8c.html#a14">snd_pcm_route_open</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> **pcmp, const char *name, <a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> sformat, int schannels, snd_pcm_route_ttable_entry_t *ttable, unsigned int tt_ssize, unsigned int tt_cused, unsigned int tt_sused, <a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *slave, int close_slave)</td></tr>
<tr><td> </td><td><font size=-1><em>Creates a new Route & Volume PCM.</em> <a href="#a14"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="pcm__route_8c.html#a15">snd_pcm_route_determine_ttable</a> (<a class="el" href="group___config.html#a1">snd_config_t</a> *tt, unsigned int *tt_csize, unsigned int *tt_ssize)</td></tr>
<tr><td> </td><td><font size=-1><em>Determine route matrix sizes.</em> <a href="#a15"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="pcm__route_8c.html#a16">snd_pcm_route_load_ttable</a> (<a class="el" href="group___config.html#a1">snd_config_t</a> *tt, snd_pcm_route_ttable_entry_t *ttable, unsigned int tt_csize, unsigned int tt_ssize, unsigned int *tt_cused, unsigned int *tt_sused, int schannels)</td></tr>
<tr><td> </td><td><font size=-1><em>Load route matrix.</em> <a href="#a16"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="pcm__route_8c.html#a17">_snd_pcm_route_open</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> **pcmp, const char *name, <a class="el" href="group___config.html#a1">snd_config_t</a> *root, <a class="el" href="group___config.html#a1">snd_config_t</a> *conf, <a class="el" href="group___p_c_m.html#a9">snd_pcm_stream_t</a> stream, int mode)</td></tr>
<tr><td> </td><td><font size=-1><em>Creates a new Route & Volume PCM.</em> <a href="#a17"></a><em></em></font><br><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
PCM Route & Volume Plugin Interface.
<p>
<p>
<dl compact><dt><b>Author: </b></dt><dd>
Abramo Bagnara <<a href="mailto:abramo@alsa-project.org">abramo@alsa-project.org</a>> </dl><dl compact><dt><b>Date: </b></dt><dd>
2000-2001</dl><hr><h2>Function Documentation</h2>
<a name="a17" doxytag="pcm_route.c::_snd_pcm_route_open"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int _snd_pcm_route_open </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> ** </td>
<td class="mdname" nowrap> <em>pcmp</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>name</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___config.html#a1">snd_config_t</a> * </td>
<td class="mdname" nowrap> <em>root</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___config.html#a1">snd_config_t</a> * </td>
<td class="mdname" nowrap> <em>conf</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a9">snd_pcm_stream_t</a> </td>
<td class="mdname" nowrap> <em>stream</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>mode</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Creates a new Route & Volume PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcmp</em> </td><td>
Returns created PCM handle </td></tr>
<tr><td valign=top><em>name</em> </td><td>
Name of PCM </td></tr>
<tr><td valign=top><em>root</em> </td><td>
Root configuration node </td></tr>
<tr><td valign=top><em>conf</em> </td><td>
Configuration node with Route & Volume PCM description </td></tr>
<tr><td valign=top><em>stream</em> </td><td>
Stream type </td></tr>
<tr><td valign=top><em>mode</em> </td><td>
Stream mode </td></tr>
</table>
</dl><dl compact><dt><b>Return values: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>zero</em> </td><td>
on success otherwise a negative error code </td></tr>
</table>
</dl><dl compact><dt><b>Warning: </b></dt><dd>
Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future. </dl> </td>
</tr>
</table>
<a name="a15" doxytag="pcm_route.c::snd_pcm_route_determine_ttable"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_route_determine_ttable </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___config.html#a1">snd_config_t</a> * </td>
<td class="mdname" nowrap> <em>tt</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int * </td>
<td class="mdname" nowrap> <em>tt_csize</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int * </td>
<td class="mdname" nowrap> <em>tt_ssize</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Determine route matrix sizes.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>tt</em> </td><td>
Configuration root describing route matrix </td></tr>
<tr><td valign=top><em>tt_csize</em> </td><td>
Returned client size in elements </td></tr>
<tr><td valign=top><em>tt_ssize</em> </td><td>
Returned slave size in elements </td></tr>
</table>
</dl><dl compact><dt><b>Return values: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>zero</em> </td><td>
on success otherwise a negative error code </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a16" doxytag="pcm_route.c::snd_pcm_route_load_ttable"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_route_load_ttable </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___config.html#a1">snd_config_t</a> * </td>
<td class="mdname" nowrap> <em>tt</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>snd_pcm_route_ttable_entry_t * </td>
<td class="mdname" nowrap> <em>ttable</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>tt_csize</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>tt_ssize</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int * </td>
<td class="mdname" nowrap> <em>tt_cused</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int * </td>
<td class="mdname" nowrap> <em>tt_sused</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>schannels</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Load route matrix.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>tt</em> </td><td>
Configuration root describing route matrix </td></tr>
<tr><td valign=top><em>ttable</em> </td><td>
Returned route matrix </td></tr>
<tr><td valign=top><em>tt_csize</em> </td><td>
Client size in elements </td></tr>
<tr><td valign=top><em>tt_ssize</em> </td><td>
Slave size in elements </td></tr>
<tr><td valign=top><em>tt_cused</em> </td><td>
Used client elements </td></tr>
<tr><td valign=top><em>tt_sused</em> </td><td>
Used slave elements </td></tr>
<tr><td valign=top><em>schannels</em> </td><td>
Slave channels </td></tr>
</table>
</dl><dl compact><dt><b>Return values: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>zero</em> </td><td>
on success otherwise a negative error code </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a14" doxytag="pcm_route.c::snd_pcm_route_open"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_route_open </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> ** </td>
<td class="mdname" nowrap> <em>pcmp</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>name</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>sformat</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>schannels</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>snd_pcm_route_ttable_entry_t * </td>
<td class="mdname" nowrap> <em>ttable</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>tt_ssize</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>tt_cused</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>tt_sused</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> * </td>
<td class="mdname" nowrap> <em>slave</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>close_slave</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Creates a new Route & Volume PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcmp</em> </td><td>
Returns created PCM handle </td></tr>
<tr><td valign=top><em>name</em> </td><td>
Name of PCM </td></tr>
<tr><td valign=top><em>sformat</em> </td><td>
Slave format </td></tr>
<tr><td valign=top><em>schannels</em> </td><td>
Slave channels </td></tr>
<tr><td valign=top><em>ttable</em> </td><td>
Attenuation table </td></tr>
<tr><td valign=top><em>tt_ssize</em> </td><td>
Attenuation table - slave size </td></tr>
<tr><td valign=top><em>tt_cused</em> </td><td>
Attenuation table - client used count </td></tr>
<tr><td valign=top><em>tt_sused</em> </td><td>
Attenuation table - slave used count </td></tr>
<tr><td valign=top><em>slave</em> </td><td>
Slave PCM handle </td></tr>
<tr><td valign=top><em>close_slave</em> </td><td>
When set, the slave PCM handle is closed with copy PCM </td></tr>
</table>
</dl><dl compact><dt><b>Return values: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>zero</em> </td><td>
on success otherwise a negative error code </td></tr>
</table>
</dl><dl compact><dt><b>Warning: </b></dt><dd>
Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future. </dl> </td>
</tr>
</table>
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