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<h1>/builddir/build/BUILD/alsa-lib-1.0.17a/src/pcm/pcm_softvol.c File Reference</h1>PCM Soft Volume Plugin Interface. <a href="#_details">More...</a>
<p>
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<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="pcm__softvol_8c.html#50a8decbd74c45a5a22338602a96a29e">snd_pcm_softvol_open</a> (<a class="el" href="group___p_c_m.html#gb5676348e7618b444e28907607660cef">snd_pcm_t</a> **pcmp, const char *name, <a class="el" href="group___p_c_m.html#g5ae31ebbea7972ce97a498040df1839e">snd_pcm_format_t</a> sformat, int ctl_card, <a class="el" href="group___control.html#gd91a3e04a25060e07917389417d474e4">snd_ctl_elem_id_t</a> *ctl_id, int cchannels, double min_dB, double max_dB, int resolution, <a class="el" href="group___p_c_m.html#gb5676348e7618b444e28907607660cef">snd_pcm_t</a> *slave, int close_slave)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a new SoftVolume PCM. <a href="#50a8decbd74c45a5a22338602a96a29e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___plugin___s_d_k.html#g2f6d194a3d7c6b9595cc57dd9801924c">snd_pcm_parse_control_id</a> (<a class="el" href="group___config.html#gb7dc173feea5bedcd999bba678eb53a7">snd_config_t</a> *conf, <a class="el" href="group___control.html#gd91a3e04a25060e07917389417d474e4">snd_ctl_elem_id_t</a> *ctl_id, int *cardp, int *cchannelsp, int *hwctlp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Parse control element id from the config. <a href="group___plugin___s_d_k.html#g2f6d194a3d7c6b9595cc57dd9801924c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="pcm__softvol_8c.html#061ca4573c6b8820ea2ec083b3ef754c">_snd_pcm_softvol_open</a> (<a class="el" href="group___p_c_m.html#gb5676348e7618b444e28907607660cef">snd_pcm_t</a> **pcmp, const char *name, <a class="el" href="group___config.html#gb7dc173feea5bedcd999bba678eb53a7">snd_config_t</a> *root, <a class="el" href="group___config.html#gb7dc173feea5bedcd999bba678eb53a7">snd_config_t</a> *conf, <a class="el" href="group___p_c_m.html#g854f0966bd0d7248ed3d9e5c293136ed">snd_pcm_stream_t</a> stream, int mode)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a new Soft Volume PCM. <a href="#061ca4573c6b8820ea2ec083b3ef754c"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
PCM Soft Volume Plugin Interface.
<p>
<dl compact><dt><b>Author:</b></dt><dd>Takashi Iwai <<a href="mailto:tiwai@suse.de">tiwai@suse.de</a>> </dd></dl>
<dl compact><dt><b>Date:</b></dt><dd>2004 </dd></dl>
<hr><h2>Function Documentation</h2>
<a class="anchor" name="061ca4573c6b8820ea2ec083b3ef754c"></a><!-- doxytag: member="pcm_softvol.c::_snd_pcm_softvol_open" ref="061ca4573c6b8820ea2ec083b3ef754c" args="(snd_pcm_t **pcmp, const char *name, snd_config_t *root, snd_config_t *conf, snd_pcm_stream_t stream, int mode)" -->
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<td class="memname">int _snd_pcm_softvol_open </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gb5676348e7618b444e28907607660cef">snd_pcm_t</a> ** </td>
<td class="paramname"> <em>pcmp</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>name</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___config.html#gb7dc173feea5bedcd999bba678eb53a7">snd_config_t</a> * </td>
<td class="paramname"> <em>root</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___config.html#gb7dc173feea5bedcd999bba678eb53a7">snd_config_t</a> * </td>
<td class="paramname"> <em>conf</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#g854f0966bd0d7248ed3d9e5c293136ed">snd_pcm_stream_t</a> </td>
<td class="paramname"> <em>stream</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>mode</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>
Creates a new Soft Volume PCM.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcmp</em> </td><td>Returns created PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>name</em> </td><td>Name of PCM </td></tr>
<tr><td valign="top"></td><td valign="top"><em>root</em> </td><td>Root configuration node </td></tr>
<tr><td valign="top"></td><td valign="top"><em>conf</em> </td><td>Configuration node with Soft Volume PCM description </td></tr>
<tr><td valign="top"></td><td valign="top"><em>stream</em> </td><td>Stream type </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mode</em> </td><td>Stream mode </td></tr>
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<dl compact><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>zero</em> </td><td>on success otherwise a negative error code </td></tr>
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<dl compact><dt><b>Warning:</b></dt><dd>Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future. </dd></dl>
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<a class="anchor" name="50a8decbd74c45a5a22338602a96a29e"></a><!-- doxytag: member="pcm_softvol.c::snd_pcm_softvol_open" ref="50a8decbd74c45a5a22338602a96a29e" args="(snd_pcm_t **pcmp, const char *name, snd_pcm_format_t sformat, int ctl_card, snd_ctl_elem_id_t *ctl_id, int cchannels, double min_dB, double max_dB, int resolution, snd_pcm_t *slave, int close_slave)" -->
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<td class="memname">int snd_pcm_softvol_open </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gb5676348e7618b444e28907607660cef">snd_pcm_t</a> ** </td>
<td class="paramname"> <em>pcmp</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#g5ae31ebbea7972ce97a498040df1839e">snd_pcm_format_t</a> </td>
<td class="paramname"> <em>sformat</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>ctl_card</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___control.html#gd91a3e04a25060e07917389417d474e4">snd_ctl_elem_id_t</a> * </td>
<td class="paramname"> <em>ctl_id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>cchannels</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>min_dB</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>max_dB</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>resolution</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gb5676348e7618b444e28907607660cef">snd_pcm_t</a> * </td>
<td class="paramname"> <em>slave</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>close_slave</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"></td>
</tr>
</table>
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<div class="memdoc">
<p>
Creates a new SoftVolume PCM.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcmp</em> </td><td>Returns created PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>name</em> </td><td>Name of PCM </td></tr>
<tr><td valign="top"></td><td valign="top"><em>sformat</em> </td><td>Slave format </td></tr>
<tr><td valign="top"></td><td valign="top"><em>ctl_card</em> </td><td>card index of the control </td></tr>
<tr><td valign="top"></td><td valign="top"><em>ctl_id</em> </td><td>The control element </td></tr>
<tr><td valign="top"></td><td valign="top"><em>cchannels</em> </td><td>PCM channels </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min_dB</em> </td><td>minimal dB value </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max_dB</em> </td><td>maximal dB value </td></tr>
<tr><td valign="top"></td><td valign="top"><em>resolution</em> </td><td>resolution of control </td></tr>
<tr><td valign="top"></td><td valign="top"><em>slave</em> </td><td>Slave PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>close_slave</em> </td><td>When set, the slave PCM handle is closed with copy PCM </td></tr>
</table>
</dl>
<dl compact><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>zero</em> </td><td>on success otherwise a negative error code </td></tr>
</table>
</dl>
<dl compact><dt><b>Warning:</b></dt><dd>Using of this function might be dangerous in the sense of compatibility reasons. The prototype might be freely changed in future. </dd></dl>
</div>
</div><p>
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