<?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_ctl_enum_info</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="ch03.html#idm140249670137408" title="General Control Interface" /><link rel="prev" href="API-snd-ctl-find-id.html" title="snd_ctl_find_id" /><link rel="next" href="ch03s02.html" title="AC97 Codec API" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">snd_ctl_enum_info</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-snd-ctl-find-id.html">Prev</a> </td><th width="60%" align="center">General Control Interface</th><td width="20%" align="right"> <a accesskey="n" href="ch03s02.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="API-snd-ctl-enum-info"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_ctl_enum_info — fills the info structure for an enumerated control </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_ctl_enum_info </strong>(</code></td><td>struct snd_ctl_elem_info * <var class="pdparam">info</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">channels</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">items</var>, </td></tr><tr><td> </td><td>const char *const <var class="pdparam">names[]</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="idm140249669946336"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>info</code></em></span></dt><dd><p> the structure to be filled </p></dd><dt><span class="term"><em class="parameter"><code>channels</code></em></span></dt><dd><p> the number of the control's channels; often one </p></dd><dt><span class="term"><em class="parameter"><code>items</code></em></span></dt><dd><p> the number of control values; also the size of <em class="parameter"><code>names</code></em> </p></dd><dt><span class="term"><em class="parameter"><code>names[]</code></em></span></dt><dd><p> an array containing the names of all control values </p></dd></dl></div></div><div class="refsect1"><a id="idm140249669936784"></a><h2>Description</h2><p> Sets all required fields in <em class="parameter"><code>info</code></em> to their appropriate values. If the control's accessibility is not the default (readable and writable), the caller has to fill <em class="parameter"><code>info</code></em>->access. </p></div><div class="refsect1"><a id="idm140249669934240"></a><h2>Return</h2><p> Zero. </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-ctl-find-id.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch03.html#idm140249670137408">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch03s02.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">snd_ctl_find_id</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> AC97 Codec API</td></tr></table></div></body></html>