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<!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_ac97_set_rate</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="ch03s02.html" title="AC97 Codec API" /><link rel="prev" href="API-snd-ac97-tune-hardware.html" title="snd_ac97_tune_hardware" /><link rel="next" href="API-snd-ac97-pcm-assign.html" title="snd_ac97_pcm_assign" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">snd_ac97_set_rate</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-snd-ac97-tune-hardware.html">Prev</a>&#160;</td><th width="60%" align="center">AC97 Codec API</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-snd-ac97-pcm-assign.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="API-snd-ac97-set-rate"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_ac97_set_rate &#8212; 
  change the rate of the given input/output.
 </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_ac97_set_rate </strong>(</code></td><td>struct snd_ac97 * <var class="pdparam">ac97</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">reg</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">rate</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a id="idm140249669694640"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>ac97</code></em></span></dt><dd><p>
     the ac97 instance
    </p></dd><dt><span class="term"><em class="parameter"><code>reg</code></em></span></dt><dd><p>
     the register to change
    </p></dd><dt><span class="term"><em class="parameter"><code>rate</code></em></span></dt><dd><p>
     the sample rate to set
    </p></dd></dl></div></div><div class="refsect1"><a id="idm140249669687440"></a><h2>Description</h2><p>
   Changes the rate of the given input/output on the codec.
   If the codec doesn't support VAR, the rate must be 48000 (except
   for SPDIF).
   </p><p>

   The valid registers are AC97_PMC_MIC_ADC_RATE,
   AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE.
   AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted
   if the codec supports them.
   AC97_SPDIF is accepted as a pseudo register to modify the SPDIF
   status bits.
</p></div><div class="refsect1"><a id="idm140249669685536"></a><h2>Return</h2><p>
   Zero if successful, or a negative error code on failure.
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