<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>snd_pcm_new_internal</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="The ALSA Driver API" /><link rel="up" href="ch02.html#idm140249671025216" title="PCM Core" /><link rel="prev" href="API-snd-pcm-new.html" title="snd_pcm_new" /><link rel="next" href="API-snd-pcm-set-ops.html" title="snd_pcm_set_ops" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">snd_pcm_new_internal</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-snd-pcm-new.html">Prev</a> </td><th width="60%" align="center">PCM Core</th><td width="20%" align="right"> <a accesskey="n" href="API-snd-pcm-set-ops.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="API-snd-pcm-new-internal"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_pcm_new_internal — create a new internal PCM instance </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <strong class="fsfunc">snd_pcm_new_internal </strong>(</code></td><td>struct snd_card * <var class="pdparam">card</var>, </td></tr><tr><td> </td><td>const char * <var class="pdparam">id</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">device</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">playback_count</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">capture_count</var>, </td></tr><tr><td> </td><td>struct snd_pcm ** <var class="pdparam">rpcm</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="idm140249670962528"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>card</code></em></span></dt><dd><p> the card instance </p></dd><dt><span class="term"><em class="parameter"><code>id</code></em></span></dt><dd><p> the id string </p></dd><dt><span class="term"><em class="parameter"><code>device</code></em></span></dt><dd><p> the device index (zero based - shared with normal PCMs) </p></dd><dt><span class="term"><em class="parameter"><code>playback_count</code></em></span></dt><dd><p> the number of substreams for playback </p></dd><dt><span class="term"><em class="parameter"><code>capture_count</code></em></span></dt><dd><p> the number of substreams for capture </p></dd><dt><span class="term"><em class="parameter"><code>rpcm</code></em></span></dt><dd><p> the pointer to store the new pcm instance </p></dd></dl></div></div><div class="refsect1"><a id="idm140249670949872"></a><h2>Description</h2><p> Creates a new internal PCM instance with no userspace device or procfs entries. This is used by ASoC Back End PCMs in order to create a PCM that will only be used internally by kernel drivers. i.e. it cannot be opened by userspace. It provides existing ASoC components drivers with a substream and access to any private data. </p><p> The pcm operators have to be set afterwards to the new instance via <code class="function">snd_pcm_set_ops</code>. </p></div><div class="refsect1"><a id="idm140249670947376"></a><h2>Return</h2><p> Zero if successful, or a negative error code on failure. </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-snd-pcm-new.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02.html#idm140249671025216">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-snd-pcm-set-ops.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">snd_pcm_new</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">snd_pcm_set_ops</span></td></tr></table></div></body></html>