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<title>ALSA project - the C library reference: /home/qateam/rpm/BUILD/alsa-lib-1.0.23/src/control/tlv.c File Reference</title>
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<h1>/home/qateam/rpm/BUILD/alsa-lib-1.0.23/src/control/tlv.c File Reference</h1>
<p>dB conversion functions from control TLV information
<a href="#_details">More...</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#ga4fa0bc99458acc08a2c59e6ed84bc94e">snd_tlv_parse_dB_info</a> (unsigned int *tlv, unsigned int tlv_size, unsigned int **db_tlvp)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Parse TLV stream and retrieve dB information. <a href="group___control.html#ga4fa0bc99458acc08a2c59e6ed84bc94e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#gad1feefed923fc08f309c4fec2b0973e2">snd_tlv_get_dB_range</a> (unsigned int *tlv, long rangemin, long rangemax, long *min, long *max)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the dB min/max values. <a href="group___control.html#gad1feefed923fc08f309c4fec2b0973e2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#ga625c16724bddbb21b18ae3b2cbaefcda">snd_tlv_convert_to_dB</a> (unsigned int *tlv, long rangemin, long rangemax, long volume, long *db_gain)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert the given raw volume value to a dB gain. <a href="group___control.html#ga625c16724bddbb21b18ae3b2cbaefcda"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#ga0ef60f47c8c82dd84816ae66346359a6">snd_tlv_convert_from_dB</a> (unsigned int *tlv, long rangemin, long rangemax, long db_gain, long *value, int xdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert from dB gain to the corresponding raw value. <a href="group___control.html#ga0ef60f47c8c82dd84816ae66346359a6"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#ga6ebf9a5917cdc2fee40245cdbc83a0c1">snd_ctl_get_dB_range</a> (<a class="el" href="group___control.html#ga06628f38def84a0fe3da74041db9d51f">snd_ctl_t</a> *ctl, const <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id, long *min, long *max)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the dB min/max values on the given control element. <a href="group___control.html#ga6ebf9a5917cdc2fee40245cdbc83a0c1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#gab44202cf8247874df15212d684a2b6ee">snd_ctl_convert_to_dB</a> (<a class="el" href="group___control.html#ga06628f38def84a0fe3da74041db9d51f">snd_ctl_t</a> *ctl, const <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id, long volume, long *db_gain)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert the volume value to dB on the given control element. <a href="group___control.html#gab44202cf8247874df15212d684a2b6ee"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___control.html#ga344c48d48be3f61d08ce911c462a3bf4">snd_ctl_convert_from_dB</a> (<a class="el" href="group___control.html#ga06628f38def84a0fe3da74041db9d51f">snd_ctl_t</a> *ctl, const <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id, long db_gain, long *value, int xdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert from dB gain to the raw volume value on the given control element. <a href="group___control.html#ga344c48d48be3f61d08ce911c462a3bf4"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>dB conversion functions from control TLV information </p>
<dl class="author"><dt><b>Author:</b></dt><dd>Takashi Iwai <<a href="mailto:tiwai@suse.de">tiwai@suse.de</a>> </dd></dl>
<dl class="date"><dt><b>Date:</b></dt><dd>2007 </dd></dl>
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