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<div class="title">Simple setup functions<div class="ingroups"><a class="el" href="group___p_c_m.html">PCM Interface</a></div></div> </div>
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Files</h2></td></tr>
<tr class="memitem:pcm__simple_8c"><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="pcm__simple_8c.html">pcm_simple.c</a></td></tr>
<tr class="memdesc:pcm__simple_8c"><td class="mdescLeft"> </td><td class="mdescRight">PCM Simple Interface. <br /></td></tr>
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Enumerations</h2></td></tr>
<tr class="memitem:ga0c8bcbf9cc83e8b0edaa501b15ff8ba9"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a> { <a class="el" href="group___p_c_m___simple.html#gga0c8bcbf9cc83e8b0edaa501b15ff8ba9a51386f1133cba0e74aad6fbd8f6cf714">SND_SPCM_LATENCY_STANDARD</a> = 0,
<a class="el" href="group___p_c_m___simple.html#gga0c8bcbf9cc83e8b0edaa501b15ff8ba9ad392df38379992a4474f24fa2d0a7146">SND_SPCM_LATENCY_MEDIUM</a>,
<a class="el" href="group___p_c_m___simple.html#gga0c8bcbf9cc83e8b0edaa501b15ff8ba9aa29ff6c1b58c9b050df6ae575229cd9c">SND_SPCM_LATENCY_REALTIME</a>
}</td></tr>
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<tr class="memitem:gaf89aba8106b8cc46e9f18d91268ec5ba"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a> { <a class="el" href="group___p_c_m___simple.html#ggaf89aba8106b8cc46e9f18d91268ec5baa7ef0dcc10a5e328bc78aa472d882f1f8">SND_SPCM_XRUN_IGNORE</a> = 0,
<a class="el" href="group___p_c_m___simple.html#ggaf89aba8106b8cc46e9f18d91268ec5baa716f9883b17fe11b35d162a6ff14a96a">SND_SPCM_XRUN_STOP</a>
}</td></tr>
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<tr class="memitem:ga6ed7a5a0762c198cb90ee48fb477b092"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___simple.html#ga6ed7a5a0762c198cb90ee48fb477b092">snd_spcm_duplex_type_t</a> { <a class="el" href="group___p_c_m___simple.html#gga6ed7a5a0762c198cb90ee48fb477b092a1baaaad19888ceeaf728364362274e0b">SND_SPCM_DUPLEX_LIBERAL</a> = 0,
<a class="el" href="group___p_c_m___simple.html#gga6ed7a5a0762c198cb90ee48fb477b092a3efcb3f575fd6b86c0198dc87484f7c9">SND_SPCM_DUPLEX_PEDANTIC</a>
}</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga5c55688bfe990821798936c20cd11ca5"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___simple.html#ga5c55688bfe990821798936c20cd11ca5">snd_spcm_init</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, unsigned int rate, unsigned int channels, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> format, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> subformat, <a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a> latency, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> _access, <a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a> xrun_type)</td></tr>
<tr class="memdesc:ga5c55688bfe990821798936c20cd11ca5"><td class="mdescLeft"> </td><td class="mdescRight">Set up a simple PCM. <a href="#ga5c55688bfe990821798936c20cd11ca5">More...</a><br /></td></tr>
<tr class="separator:ga5c55688bfe990821798936c20cd11ca5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga148a05b14b083d9c6ded79dd6bfd7fdd"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___simple.html#ga148a05b14b083d9c6ded79dd6bfd7fdd">snd_spcm_init_duplex</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *playback_pcm, <a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *capture_pcm, unsigned int rate, unsigned int channels, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> format, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> subformat, <a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a> latency, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> _access, <a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a> xrun_type, <a class="el" href="group___p_c_m___simple.html#ga6ed7a5a0762c198cb90ee48fb477b092">snd_spcm_duplex_type_t</a> duplex_type)</td></tr>
<tr class="memdesc:ga148a05b14b083d9c6ded79dd6bfd7fdd"><td class="mdescLeft"> </td><td class="mdescRight">Initialize simple PCMs in the duplex mode. <a href="#ga148a05b14b083d9c6ded79dd6bfd7fdd">More...</a><br /></td></tr>
<tr class="separator:ga148a05b14b083d9c6ded79dd6bfd7fdd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gab6ee6daf2b83bdebf6cf6355c0365885"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___simple.html#gab6ee6daf2b83bdebf6cf6355c0365885">snd_spcm_init_get_params</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, unsigned int *rate, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *buffer_size, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *period_size)</td></tr>
<tr class="memdesc:gab6ee6daf2b83bdebf6cf6355c0365885"><td class="mdescLeft"> </td><td class="mdescRight">Get the set up of simple PCM. <a href="#gab6ee6daf2b83bdebf6cf6355c0365885">More...</a><br /></td></tr>
<tr class="separator:gab6ee6daf2b83bdebf6cf6355c0365885"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>See the <a class="el" href="pcm.html">PCM (digital audio) interface</a> page for more details. </p>
<h2 class="groupheader">Enumeration Type Documentation</h2>
<a class="anchor" id="ga6ed7a5a0762c198cb90ee48fb477b092"></a>
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<td class="memname">enum <a class="el" href="group___p_c_m___simple.html#ga6ed7a5a0762c198cb90ee48fb477b092">snd_spcm_duplex_type_t</a></td>
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<p>Simple PCM duplex type </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a class="anchor" id="gga6ed7a5a0762c198cb90ee48fb477b092a1baaaad19888ceeaf728364362274e0b"></a>SND_SPCM_DUPLEX_LIBERAL </td><td class="fielddoc">
<p>liberal duplex - the buffer and period sizes might not match </p>
</td></tr>
<tr><td class="fieldname"><a class="anchor" id="gga6ed7a5a0762c198cb90ee48fb477b092a3efcb3f575fd6b86c0198dc87484f7c9"></a>SND_SPCM_DUPLEX_PEDANTIC </td><td class="fielddoc">
<p>pedantic duplex - the buffer and period sizes MUST match </p>
</td></tr>
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<td class="memname">enum <a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a></td>
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<p>Simple PCM latency type </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a class="anchor" id="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9a51386f1133cba0e74aad6fbd8f6cf714"></a>SND_SPCM_LATENCY_STANDARD </td><td class="fielddoc">
<p>standard latency - for standard playback or capture (estimated latency in one direction 350ms) </p>
</td></tr>
<tr><td class="fieldname"><a class="anchor" id="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9ad392df38379992a4474f24fa2d0a7146"></a>SND_SPCM_LATENCY_MEDIUM </td><td class="fielddoc">
<p>medium latency - software phones etc. (estimated latency in one direction maximally 25ms </p>
</td></tr>
<tr><td class="fieldname"><a class="anchor" id="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9aa29ff6c1b58c9b050df6ae575229cd9c"></a>SND_SPCM_LATENCY_REALTIME </td><td class="fielddoc">
<p>realtime latency - realtime applications (effect processors etc.) (estimated latency in one direction 5ms and better) </p>
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<a class="anchor" id="gaf89aba8106b8cc46e9f18d91268ec5ba"></a>
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<td class="memname">enum <a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a></td>
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</div><div class="memdoc">
<p>Simple PCM xrun type </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a class="anchor" id="ggaf89aba8106b8cc46e9f18d91268ec5baa7ef0dcc10a5e328bc78aa472d882f1f8"></a>SND_SPCM_XRUN_IGNORE </td><td class="fielddoc">
<p>driver / library will ignore all xruns, the stream runs forever </p>
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<tr><td class="fieldname"><a class="anchor" id="ggaf89aba8106b8cc46e9f18d91268ec5baa716f9883b17fe11b35d162a6ff14a96a"></a>SND_SPCM_XRUN_STOP </td><td class="fielddoc">
<p>driver / library stops the stream when an xrun occurs </p>
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</div>
<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">int snd_spcm_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"><em>pcm</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>rate</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>channels</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> </td>
<td class="paramname"><em>format</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> </td>
<td class="paramname"><em>subformat</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a> </td>
<td class="paramname"><em>latency</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> </td>
<td class="paramname"><em>access</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a> </td>
<td class="paramname"><em>xrun_type</em> </td>
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<td></td>
<td>)</td>
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<p>Set up a simple PCM. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">rate</td><td>Sample rate </td></tr>
<tr><td class="paramname">channels</td><td>Number of channels </td></tr>
<tr><td class="paramname">format</td><td>PCM format </td></tr>
<tr><td class="paramname">subformat</td><td>PCM subformat </td></tr>
<tr><td class="paramname">latency</td><td>Latency type </td></tr>
<tr><td class="paramname">access</td><td>PCM acceess type </td></tr>
<tr><td class="paramname">xrun_type</td><td>XRUN type </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or a negative error code</dd></dl>
<dl class="section warning"><dt>Warning</dt><dd>The simple PCM API may be broken in the current release. </dd></dl>
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<td class="memname">int snd_spcm_init_duplex </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"><em>playback_pcm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"><em>capture_pcm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>rate</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"><em>channels</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> </td>
<td class="paramname"><em>format</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> </td>
<td class="paramname"><em>subformat</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a> </td>
<td class="paramname"><em>latency</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> </td>
<td class="paramname"><em>access</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a> </td>
<td class="paramname"><em>xrun_type</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m___simple.html#ga6ed7a5a0762c198cb90ee48fb477b092">snd_spcm_duplex_type_t</a> </td>
<td class="paramname"><em>duplex_type</em> </td>
</tr>
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<td></td>
<td>)</td>
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<p>Initialize simple PCMs in the duplex mode. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">playback_pcm</td><td>PCM handle for playback </td></tr>
<tr><td class="paramname">capture_pcm</td><td>PCM handle for capture </td></tr>
<tr><td class="paramname">rate</td><td>Sample rate </td></tr>
<tr><td class="paramname">channels</td><td>Number of channels </td></tr>
<tr><td class="paramname">format</td><td>PCM format </td></tr>
<tr><td class="paramname">subformat</td><td>PCM subformat </td></tr>
<tr><td class="paramname">latency</td><td>Latency type </td></tr>
<tr><td class="paramname">access</td><td>PCM acceess type </td></tr>
<tr><td class="paramname">xrun_type</td><td>XRUN type </td></tr>
<tr><td class="paramname">duplex_type</td><td>Duplex mode </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or a negative error code</dd></dl>
<dl class="section warning"><dt>Warning</dt><dd>The simple PCM API may be broken in the current release. </dd></dl>
</div>
</div>
<a class="anchor" id="gab6ee6daf2b83bdebf6cf6355c0365885"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int snd_spcm_init_get_params </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"><em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"><em>rate</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"><em>buffer_size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"><em>period_size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the set up of simple PCM. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">rate</td><td>Pointer to store the current sample rate </td></tr>
<tr><td class="paramname">buffer_size</td><td>Pointer to store the current buffer size </td></tr>
<tr><td class="paramname">period_size</td><td>Pointer to store the current period size </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 if successful, or a negative error code</dd></dl>
<dl class="section warning"><dt>Warning</dt><dd>The simple PCM API may be broken in the current release. </dd></dl>
</div>
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