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libalsa2-docs-1.0.23-2mdv2010.1.x86_64.rpm

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<h1>Simple setup functions<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 colspan="2"><h2>Files</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">file &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="pcm__simple_8c.html">pcm_simple.c</a></td></tr>

<p><tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight"><p>PCM Simple Interface. </p>
<br/></td></tr>
</p>
<tr><td colspan="2"><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum &nbsp;</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>
<tr><td class="memItemLeft" align="right" valign="top">enum &nbsp;</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>
<tr><td class="memItemLeft" align="right" valign="top">enum &nbsp;</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>
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&nbsp;</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><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set up a simple PCM.  <a href="#ga5c55688bfe990821798936c20cd11ca5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&nbsp;</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><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Initialize simple PCMs in the duplex mode.  <a href="#ga148a05b14b083d9c6ded79dd6bfd7fdd"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&nbsp;</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><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Get the set up of simple PCM.  <a href="#gab6ee6daf2b83bdebf6cf6355c0365885"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>See the <a class="el" href="pcm.html">PCM (digital audio) interface</a> page for more details. </p>
<hr/><h2>Enumeration Type Documentation</h2>
<a class="anchor" id="ga6ed7a5a0762c198cb90ee48fb477b092"></a><!-- doxytag: member="pcm.h::snd_spcm_duplex_type_t" ref="ga6ed7a5a0762c198cb90ee48fb477b092" args="" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">enum <a class="el" href="group___p_c_m___simple.html#ga6ed7a5a0762c198cb90ee48fb477b092">snd_spcm_duplex_type_t</a></td>
        </tr>
      </table>
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<div class="memdoc">
<p>Simple PCM duplex type </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="gga6ed7a5a0762c198cb90ee48fb477b092a1baaaad19888ceeaf728364362274e0b"></a><!-- doxytag: member="SND_SPCM_DUPLEX_LIBERAL" ref="gga6ed7a5a0762c198cb90ee48fb477b092a1baaaad19888ceeaf728364362274e0b" args="" -->SND_SPCM_DUPLEX_LIBERAL</em>&nbsp;</td><td>
<p>liberal duplex - the buffer and period sizes might not match </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga6ed7a5a0762c198cb90ee48fb477b092a3efcb3f575fd6b86c0198dc87484f7c9"></a><!-- doxytag: member="SND_SPCM_DUPLEX_PEDANTIC" ref="gga6ed7a5a0762c198cb90ee48fb477b092a3efcb3f575fd6b86c0198dc87484f7c9" args="" -->SND_SPCM_DUPLEX_PEDANTIC</em>&nbsp;</td><td>
<p>pedantic duplex - the buffer and period sizes MUST match </p>
</td></tr>
</table>
</dd>
</dl>

</div>
</div>
<a class="anchor" id="ga0c8bcbf9cc83e8b0edaa501b15ff8ba9"></a><!-- doxytag: member="pcm.h::snd_spcm_latency_t" ref="ga0c8bcbf9cc83e8b0edaa501b15ff8ba9" args="" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">enum <a class="el" href="group___p_c_m___simple.html#ga0c8bcbf9cc83e8b0edaa501b15ff8ba9">snd_spcm_latency_t</a></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<p>Simple PCM latency type </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9a51386f1133cba0e74aad6fbd8f6cf714"></a><!-- doxytag: member="SND_SPCM_LATENCY_STANDARD" ref="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9a51386f1133cba0e74aad6fbd8f6cf714" args="" -->SND_SPCM_LATENCY_STANDARD</em>&nbsp;</td><td>
<p>standard latency - for standard playback or capture (estimated latency in one direction 350ms) </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9ad392df38379992a4474f24fa2d0a7146"></a><!-- doxytag: member="SND_SPCM_LATENCY_MEDIUM" ref="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9ad392df38379992a4474f24fa2d0a7146" args="" -->SND_SPCM_LATENCY_MEDIUM</em>&nbsp;</td><td>
<p>medium latency - software phones etc. (estimated latency in one direction maximally 25ms </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9aa29ff6c1b58c9b050df6ae575229cd9c"></a><!-- doxytag: member="SND_SPCM_LATENCY_REALTIME" ref="gga0c8bcbf9cc83e8b0edaa501b15ff8ba9aa29ff6c1b58c9b050df6ae575229cd9c" args="" -->SND_SPCM_LATENCY_REALTIME</em>&nbsp;</td><td>
<p>realtime latency - realtime applications (effect processors etc.) (estimated latency in one direction 5ms and better) </p>
</td></tr>
</table>
</dd>
</dl>

</div>
</div>
<a class="anchor" id="gaf89aba8106b8cc46e9f18d91268ec5ba"></a><!-- doxytag: member="pcm.h::snd_spcm_xrun_type_t" ref="gaf89aba8106b8cc46e9f18d91268ec5ba" args="" -->
<div class="memitem">
<div class="memproto">
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        <tr>
          <td class="memname">enum <a class="el" href="group___p_c_m___simple.html#gaf89aba8106b8cc46e9f18d91268ec5ba">snd_spcm_xrun_type_t</a></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<p>Simple PCM xrun type </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="ggaf89aba8106b8cc46e9f18d91268ec5baa7ef0dcc10a5e328bc78aa472d882f1f8"></a><!-- doxytag: member="SND_SPCM_XRUN_IGNORE" ref="ggaf89aba8106b8cc46e9f18d91268ec5baa7ef0dcc10a5e328bc78aa472d882f1f8" args="" -->SND_SPCM_XRUN_IGNORE</em>&nbsp;</td><td>
<p>driver / library will ignore all xruns, the stream runs forever </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ggaf89aba8106b8cc46e9f18d91268ec5baa716f9883b17fe11b35d162a6ff14a96a"></a><!-- doxytag: member="SND_SPCM_XRUN_STOP" ref="ggaf89aba8106b8cc46e9f18d91268ec5baa716f9883b17fe11b35d162a6ff14a96a" args="" -->SND_SPCM_XRUN_STOP</em>&nbsp;</td><td>
<p>driver / library stops the stream when an xrun occurs </p>
</td></tr>
</table>
</dd>
</dl>

</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga5c55688bfe990821798936c20cd11ca5"></a><!-- doxytag: member="pcm.h::snd_spcm_init" ref="ga5c55688bfe990821798936c20cd11ca5" args="(snd_pcm_t *pcm, unsigned int rate, unsigned int channels, snd_pcm_format_t format, snd_pcm_subformat_t subformat, snd_spcm_latency_t latency, snd_pcm_access_t _access, snd_spcm_xrun_type_t xrun_type)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <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> *&nbsp;</td>
          <td class="paramname"> <em>pcm</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&nbsp;</td>
          <td class="paramname"> <em>rate</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</td>
          <td class="paramname"> <em>xrun_type</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>Set up a simple PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>pcm</em>&nbsp;</td><td>PCM handle </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>rate</em>&nbsp;</td><td>Sample rate </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>channels</em>&nbsp;</td><td>Number of channels </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>format</em>&nbsp;</td><td>PCM format </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>subformat</em>&nbsp;</td><td>PCM subformat </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>latency</em>&nbsp;</td><td>Latency type </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>access</em>&nbsp;</td><td>PCM acceess type </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>xrun_type</em>&nbsp;</td><td>XRUN type </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if successful, or a negative error code</dd></dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>The simple PCM API may be broken in the current release. </dd></dl>

</div>
</div>
<a class="anchor" id="ga148a05b14b083d9c6ded79dd6bfd7fdd"></a><!-- doxytag: member="pcm.h::snd_spcm_init_duplex" ref="ga148a05b14b083d9c6ded79dd6bfd7fdd" args="(snd_pcm_t *playback_pcm, snd_pcm_t *capture_pcm, unsigned int rate, unsigned int channels, snd_pcm_format_t format, snd_pcm_subformat_t subformat, snd_spcm_latency_t latency, snd_pcm_access_t _access, snd_spcm_xrun_type_t xrun_type, snd_spcm_duplex_type_t duplex_type)" -->
<div class="memitem">
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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> *&nbsp;</td>
          <td class="paramname"> <em>playback_pcm</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *&nbsp;</td>
          <td class="paramname"> <em>capture_pcm</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&nbsp;</td>
          <td class="paramname"> <em>rate</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp;</td>
          <td class="paramname"> <em>duplex_type</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>Initialize simple PCMs in the duplex mode. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>playback_pcm</em>&nbsp;</td><td>PCM handle for playback </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>capture_pcm</em>&nbsp;</td><td>PCM handle for capture </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>rate</em>&nbsp;</td><td>Sample rate </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>channels</em>&nbsp;</td><td>Number of channels </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>format</em>&nbsp;</td><td>PCM format </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>subformat</em>&nbsp;</td><td>PCM subformat </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>latency</em>&nbsp;</td><td>Latency type </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>access</em>&nbsp;</td><td>PCM acceess type </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>xrun_type</em>&nbsp;</td><td>XRUN type </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>duplex_type</em>&nbsp;</td><td>Duplex mode </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if successful, or a negative error code</dd></dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>The simple PCM API may be broken in the current release. </dd></dl>

</div>
</div>
<a class="anchor" id="gab6ee6daf2b83bdebf6cf6355c0365885"></a><!-- doxytag: member="pcm.h::snd_spcm_init_get_params" ref="gab6ee6daf2b83bdebf6cf6355c0365885" args="(snd_pcm_t *pcm, unsigned int *rate, snd_pcm_uframes_t *buffer_size, snd_pcm_uframes_t *period_size)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <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> *&nbsp;</td>
          <td class="paramname"> <em>pcm</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned int *&nbsp;</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> *&nbsp;</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> *&nbsp;</td>
          <td class="paramname"> <em>period_size</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>Get the set up of simple PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>pcm</em>&nbsp;</td><td>PCM handle </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>rate</em>&nbsp;</td><td>Pointer to store the current sample rate </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>buffer_size</em>&nbsp;</td><td>Pointer to store the current buffer size </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>period_size</em>&nbsp;</td><td>Pointer to store the current period size </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if successful, or a negative error code</dd></dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>The simple PCM API may be broken in the current release. </dd></dl>

</div>
</div>
</div>
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