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<hr><h1>Software Parameters<br>
<small>
[<a class="el" href="group___p_c_m.html">PCM Interface</a>]</small>
</h1><table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Defines</h2></td></tr>
<tr><td nowrap align=right valign=top>#define </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a20">snd_pcm_sw_params_alloca</a>(ptr)</td></tr>
<tr><td> </td><td><font size=-1><em>allocate an invalid <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> using standard alloca</em> <a href="#a20"></a><em></em></font><br><br></td></tr>
<tr><td colspan=2><br><h2>Functions</h2></td></tr>
<tr><td nowrap align=right valign=top>size_t </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a0">snd_pcm_sw_params_sizeof</a> (void)</td></tr>
<tr><td> </td><td><font size=-1><em>get size of <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a></em> <a href="#a0"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a1">snd_pcm_sw_params_malloc</a> (<a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_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#a2">snd_pcm_sw_params_t</a> using standard malloc</em> <a href="#a1"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a2">snd_pcm_sw_params_free</a> (<a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> *obj)</td></tr>
<tr><td> </td><td><font size=-1><em>frees a previously allocated <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a></em> <a href="#a2"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a3">snd_pcm_sw_params_copy</a> (<a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> *dst, const <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> *src)</td></tr>
<tr><td> </td><td><font size=-1><em>copy one <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> to another</em> <a href="#a3"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a4">snd_pcm_sw_params_set_tstamp_mode</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a16">snd_pcm_tstamp_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set timestamp mode inside a software configuration container.</em> <a href="#a4"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a6">snd_pcm_sw_params_set_sleep_min</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#a2">snd_pcm_sw_params_t</a> *params, unsigned int val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set minimum number of ticks to sleep inside a software configuration container.</em> <a href="#a6"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a8">snd_pcm_sw_params_set_avail_min</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set avail min inside a software configuration container.</em> <a href="#a8"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a10">snd_pcm_sw_params_set_xfer_align</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set xfer align inside a software configuration container.</em> <a href="#a10"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a12">snd_pcm_sw_params_set_start_threshold</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set start threshold inside a software configuration container.</em> <a href="#a12"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___s_w___params.html#a14">snd_pcm_sw_params_set_stop_threshold</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set stop threshold inside a software configuration container.</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="group___p_c_m___s_w___params.html#a16">snd_pcm_sw_params_set_silence_threshold</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set silence threshold inside a software configuration container.</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="group___p_c_m___s_w___params.html#a18">snd_pcm_sw_params_set_silence_size</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#a2">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td> </td><td><font size=-1><em>Set silence size inside a software configuration container.</em> <a href="#a18"></a><em></em></font><br><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
See the <a href="pcm.html#pcm">PCM (digital audio) interface</a> page for more details. <hr><h2>Define Documentation</h2>
<a name="a20" doxytag="pcm.h::snd_pcm_sw_params_alloca"></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"> #define snd_pcm_sw_params_alloca</td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">ptr </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap>
</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#a2">snd_pcm_sw_params_t</a> using standard alloca
<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>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a20">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a38">/test/pcm.c</a>.</dl> </td>
</tr>
</table>
<hr><h2>Function Documentation</h2>
<a name="a3" doxytag="pcm.h::snd_pcm_sw_params_copy"></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_sw_params_copy </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>dst</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>src</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>
copy one <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> to another
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dst</em> </td><td>
pointer to destination </td></tr>
<tr><td valign=top><em>src</em> </td><td>
pointer to source </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a2" doxytag="pcm.h::snd_pcm_sw_params_free"></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_sw_params_free </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname1" valign="top" nowrap> <em>obj</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>
frees a previously allocated <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a>
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pointer</em> </td><td>
to object to free </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a1" doxytag="pcm.h::snd_pcm_sw_params_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_sw_params_malloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_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#a2">snd_pcm_sw_params_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="a8" doxytag="pcm.h::snd_pcm_sw_params_set_avail_min"></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_sw_params_set_avail_min </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_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 avail min inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Minimum avail frames to consider PCM ready </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code</dl>Note: This is similar to setting an OSS wakeup point. The valid values for 'val' are determined by the specific hardware. Most PC sound cards can only accept power of 2 frame counts (i.e. 512, 1024, 2048). You cannot use this as a high resolution timer - it is limited to how often the sound card hardware raises an interrupt. Note that you can greatly improve the reponses using <a class="el" href="group___p_c_m___s_w___params.html#a6">Software Parameters</a> where another timing source is used. <dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a16">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a17">/test/pcm.c</a>.</dl> </td>
</tr>
</table>
<a name="a18" doxytag="pcm.h::snd_pcm_sw_params_set_silence_size"></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_sw_params_set_silence_size </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_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 silence size inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Silence size in frames (0 for disabled) </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code</dl>A portion of playback buffer is overwritten with silence when playback underrun is nearer than silence threshold (see <a class="el" href="group___p_c_m___s_w___params.html#a16">snd_pcm_sw_params_set_silence_threshold</a>) </td>
</tr>
</table>
<a name="a16" doxytag="pcm.h::snd_pcm_sw_params_set_silence_threshold"></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_sw_params_set_silence_threshold </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_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 silence threshold inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Silence threshold in frames </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code</dl>A portion of playback buffer is overwritten with silence (see <a class="el" href="group___p_c_m___s_w___params.html#a18">snd_pcm_sw_params_set_silence_size</a>) when playback underrun is nearer than silence threshold </td>
</tr>
</table>
<a name="a6" doxytag="pcm.h::snd_pcm_sw_params_set_sleep_min"></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_sw_params_set_sleep_min </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </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 minimum number of ticks to sleep inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Minimum ticks to sleep or 0 to disable the use of tick timer </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code </dl><dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a14">/test/latency.c</a>.</dl> </td>
</tr>
</table>
<a name="a12" doxytag="pcm.h::snd_pcm_sw_params_set_start_threshold"></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_sw_params_set_start_threshold </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_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 start threshold inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Start threshold in frames </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code</dl>PCM is automatically started when playback frames available to PCM are >= threshold or when requested capture frames are >= threshold <dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a11">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a16">/test/pcm.c</a>.</dl> </td>
</tr>
</table>
<a name="a14" doxytag="pcm.h::snd_pcm_sw_params_set_stop_threshold"></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_sw_params_set_stop_threshold </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_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 stop threshold inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Stop threshold in frames </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code</dl>PCM is automatically stopped in <a class="el" href="group___p_c_m.html#a72a111">SND_PCM_STATE_XRUN</a> state when available frames is >= threshold </td>
</tr>
</table>
<a name="a4" doxytag="pcm.h::snd_pcm_sw_params_set_tstamp_mode"></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_sw_params_set_tstamp_mode </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a16">snd_pcm_tstamp_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 timestamp mode inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Timestamp mode </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code </dl> </td>
</tr>
</table>
<a name="a10" doxytag="pcm.h::snd_pcm_sw_params_set_xfer_align"></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_sw_params_set_xfer_align </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#a2">snd_pcm_sw_params_t</a> * </td>
<td class="mdname" nowrap> <em>params</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_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 xfer align inside a software configuration container.
<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>params</em> </td><td>
Software configuration container </td></tr>
<tr><td valign=top><em>val</em> </td><td>
Chunk size (frames are attempted to be transferred in chunks) </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 otherwise a negative error code </dl><dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a17">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a18">/test/pcm.c</a>.</dl> </td>
</tr>
</table>
<a name="a0" doxytag="pcm.h::snd_pcm_sw_params_sizeof"></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"> size_t snd_pcm_sw_params_sizeof </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void </td>
<td class="mdname1" valign="top" nowrap> </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>
get size of <a class="el" href="group___p_c_m.html#a2">snd_pcm_sw_params_t</a>
<p>
<dl compact><dt><b>Returns: </b></dt><dd>
size in bytes </dl> </td>
</tr>
</table>
<hr><address style="align: right;"><small>Generated on Wed Apr 2 16:06:38 2003 for ALSA project - the C library reference by
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