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<hr><h1>pcm_meter.c File Reference</h1>Helper functions for <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scopes.
<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__meter_8c.html#a0">snd_pcm_meter_add_scope</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope)</td></tr>
<tr><td> </td><td><font size=-1><em>Add a scope to a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a0"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a1">snd_pcm_meter_search_scope</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, const char *name)</td></tr>
<tr><td> </td><td><font size=-1><em>Search an installed scope inside a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a1"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a2">snd_pcm_meter_get_bufsize</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm)</td></tr>
<tr><td> </td><td><font size=-1><em>Get meter buffer size from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a2"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>unsigned int </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a3">snd_pcm_meter_get_channels</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm)</td></tr>
<tr><td> </td><td><font size=-1><em>Get meter channels from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a3"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>unsigned int </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a4">snd_pcm_meter_get_rate</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm)</td></tr>
<tr><td> </td><td><font size=-1><em>Get meter rate from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a4"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a5">snd_pcm_meter_get_now</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm)</td></tr>
<tr><td> </td><td><font size=-1><em>Get meter "now" frame pointer from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a5"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a6">snd_pcm_meter_get_boundary</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm)</td></tr>
<tr><td> </td><td><font size=-1><em>Get boundary for frame pointers from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a6"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a7">snd_pcm_scope_set_name</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope, const char *val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set name of a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.</em> <a href="#a7"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>const char * </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a8">snd_pcm_scope_get_name</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope)</td></tr>
<tr><td> </td><td><font size=-1><em>Get name of a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.</em> <a href="#a8"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a9">snd_pcm_scope_set_ops</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope, <a class="el" href="group___p_c_m___scope.html#a0">snd_pcm_scope_ops_t</a> *val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set callbacks for a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.</em> <a href="#a9"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void * </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a10">snd_pcm_scope_get_callback_private</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope)</td></tr>
<tr><td> </td><td><font size=-1><em>Get callbacks private value for a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.</em> <a href="#a10"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a11">snd_pcm_scope_set_callback_private</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope, void *val)</td></tr>
<tr><td> </td><td><font size=-1><em>Get callbacks private value for a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.</em> <a href="#a11"></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__meter_8c.html#a12">snd_pcm_scope_s16_open</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, const char *name, <a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> **scopep)</td></tr>
<tr><td> </td><td><font size=-1><em>Add a s16 pseudo scope to a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.</em> <a href="#a12"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int16_t * </td><td valign=bottom><a class="el" href="pcm__meter_8c.html#a13">snd_pcm_scope_s16_get_channel_buffer</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> *scope, unsigned int channel)</td></tr>
<tr><td> </td><td><font size=-1><em>Get s16 pseudo scope frames buffer for a channel.</em> <a href="#a13"></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__meter_8c.html#a14">snd_pcm_scope_malloc</a> (<a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> **ptr)</td></tr>
<tr><td> </td><td><font size=-1><em>allocate an invalid <a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> using standard malloc</em> <a href="#a14"></a><em></em></font><br><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Helper functions for <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scopes.
<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>
2001</dl>Helper functions for <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scopes
<p>
<hr><h2>Function Documentation</h2>
<a name="a0" doxytag="pcm_meter.c::snd_pcm_meter_add_scope"></a><p>
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<td class="md" nowrap valign="top"> int snd_pcm_meter_add_scope </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>pcm</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname" nowrap> <em>scope</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
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<td>
</td>
<td>
<p>
Add a scope to a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
<tr><td valign=top><em>scope</em> </td><td>
Scope handle </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise a negative error code </dl> </td>
</tr>
</table>
<a name="a6" doxytag="pcm_meter.c::snd_pcm_meter_get_boundary"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> snd_pcm_meter_get_boundary </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="mdname1" valign="top" nowrap> <em>pcm</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
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<td>
</td>
<td>
<p>
Get boundary for frame pointers from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
boundary in frames </dl> </td>
</tr>
</table>
<a name="a2" doxytag="pcm_meter.c::snd_pcm_meter_get_bufsize"></a><p>
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<td class="md">
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<td class="md" nowrap valign="top"> <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> snd_pcm_meter_get_bufsize </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="mdname1" valign="top" nowrap> <em>pcm</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
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<td>
</td>
<td>
<p>
Get meter buffer size from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
meter buffer size in frames </dl> </td>
</tr>
</table>
<a name="a3" doxytag="pcm_meter.c::snd_pcm_meter_get_channels"></a><p>
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<td class="md">
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<td class="md" nowrap valign="top"> unsigned int snd_pcm_meter_get_channels </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="mdname1" valign="top" nowrap> <em>pcm</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
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<td>
</td>
<td>
<p>
Get meter channels from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
meter channels count </dl> </td>
</tr>
</table>
<a name="a5" doxytag="pcm_meter.c::snd_pcm_meter_get_now"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> snd_pcm_meter_get_now </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="mdname1" valign="top" nowrap> <em>pcm</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
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<td>
</td>
<td>
<p>
Get meter "now" frame pointer from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
"now" frame pointer in frames (0 ... boundary - 1) see <a class="el" href="pcm__meter_8c.html#a6">snd_pcm_meter_get_boundary</a> </dl> </td>
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</table>
<a name="a4" doxytag="pcm_meter.c::snd_pcm_meter_get_rate"></a><p>
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<td class="md" nowrap valign="top"> unsigned int snd_pcm_meter_get_rate </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="mdname1" valign="top" nowrap> <em>pcm</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
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</td>
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<p>
Get meter rate from a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
approximate rate </dl> </td>
</tr>
</table>
<a name="a1" doxytag="pcm_meter.c::snd_pcm_meter_search_scope"></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a>* snd_pcm_meter_search_scope </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>pcm</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 class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
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</td>
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<td>
</td>
<td>
<p>
Search an installed scope inside a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
<tr><td valign=top><em>name</em> </td><td>
scope name </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
pointer to found scope or NULL if none is found </dl> </td>
</tr>
</table>
<a name="a10" doxytag="pcm_meter.c::snd_pcm_scope_get_callback_private"></a><p>
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<td class="md" nowrap valign="top"> void* snd_pcm_scope_get_callback_private </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname1" valign="top" nowrap> <em>scope</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
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</td>
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<td>
</td>
<td>
<p>
Get callbacks private value for a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>scope</em> </td><td>
PCM meter scope </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
Private data value </dl> </td>
</tr>
</table>
<a name="a8" doxytag="pcm_meter.c::snd_pcm_scope_get_name"></a><p>
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<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top"> const char* snd_pcm_scope_get_name </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname1" valign="top" nowrap> <em>scope</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
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<td>
</td>
<td>
<p>
Get name of a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>scope</em> </td><td>
PCM meter scope </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
scope name </dl> </td>
</tr>
</table>
<a name="a14" doxytag="pcm_meter.c::snd_pcm_scope_malloc"></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_scope_malloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> ** </td>
<td class="mdname1" valign="top" nowrap> <em>ptr</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
allocate an invalid <a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> using standard malloc
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>ptr</em> </td><td>
returned pointer </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise negative error code </dl> </td>
</tr>
</table>
<a name="a13" doxytag="pcm_meter.c::snd_pcm_scope_s16_get_channel_buffer"></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"> int16_t* snd_pcm_scope_s16_get_channel_buffer </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname" nowrap> <em>scope</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>channel</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>
Get s16 pseudo scope frames buffer for a channel.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>scope</em> </td><td>
s16 pseudo scope handle </td></tr>
<tr><td valign=top><em>channel</em> </td><td>
Channel </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
Pointer to channel buffer </dl> </td>
</tr>
</table>
<a name="a12" doxytag="pcm_meter.c::snd_pcm_scope_s16_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_scope_s16_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>pcm</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#a24">snd_pcm_scope_t</a> ** </td>
<td class="mdname" nowrap> <em>scopep</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>
Add a s16 pseudo scope to a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>name</em> </td><td>
Scope name </td></tr>
<tr><td valign=top><em>scopep</em> </td><td>
Pointer to newly created and added scope </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise a negative error code</dl>s16 pseudo scope convert <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM frames in CPU endian 16 bit frames for use with other scopes. Don't forget to insert it before and to not insert it more time (see <a class="el" href="pcm__meter_8c.html#a1">snd_pcm_meter_search_scope</a>) </td>
</tr>
</table>
<a name="a11" doxytag="pcm_meter.c::snd_pcm_scope_set_callback_private"></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"> void snd_pcm_scope_set_callback_private </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname" nowrap> <em>scope</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>void * </td>
<td class="mdname" nowrap> <em>val</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>
Get callbacks private value for a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>scope</em> </td><td>
PCM meter scope </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Private data value </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a7" doxytag="pcm_meter.c::snd_pcm_scope_set_name"></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"> void snd_pcm_scope_set_name </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname" nowrap> <em>scope</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>val</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>
Set name of a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>scope</em> </td><td>
PCM meter scope </td></tr>
<tr><td valign=top><em>name</em> </td><td>
scope name </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a9" doxytag="pcm_meter.c::snd_pcm_scope_set_ops"></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"> void snd_pcm_scope_set_ops </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a24">snd_pcm_scope_t</a> * </td>
<td class="mdname" nowrap> <em>scope</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m___scope.html#a0">snd_pcm_scope_ops_t</a> * </td>
<td class="mdname" nowrap> <em>val</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>
Set callbacks for a <a class="el" href="group___p_c_m.html#a76a141">SND_PCM_TYPE_METER</a> PCM scope.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>scope</em> </td><td>
PCM meter scope </td></tr>
<tr><td valign=top><em>val</em> </td><td>
callbacks </td></tr>
</table>
</dl> </td>
</tr>
</table>
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