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<hr><h1>Helper Functions<br>
<small>
[<a class="el" href="group___p_c_m.html">PCM Interface</a>]</small>
</h1><table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Functions</h2></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a0">snd_pcm_format_signed</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return sign info for a PCM sample linear format.</em> <a href="#a0"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a1">snd_pcm_format_unsigned</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return sign info for a PCM sample linear format.</em> <a href="#a1"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a2">snd_pcm_format_linear</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return linear info for a PCM sample format.</em> <a href="#a2"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a3">snd_pcm_format_float</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return float info for a PCM sample format.</em> <a href="#a3"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a4">snd_pcm_format_little_endian</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return endian info for a PCM sample format.</em> <a href="#a4"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a5">snd_pcm_format_big_endian</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return endian info for a PCM sample format.</em> <a href="#a5"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a6">snd_pcm_format_cpu_endian</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return endian info for a PCM sample format.</em> <a href="#a6"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a7">snd_pcm_format_width</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return nominal bits per a PCM sample.</em> <a href="#a7"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a8">snd_pcm_format_physical_width</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return bits needed to store a PCM sample.</em> <a href="#a8"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a9">snd_pcm_build_linear_format</a> (int width, int pwidth, int unsignd, int big_endian)</td></tr>
<tr><td> </td><td><font size=-1><em>Compose a PCM sample linear format.</em> <a href="#a9"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>ssize_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a10">snd_pcm_format_size</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format, size_t samples)</td></tr>
<tr><td> </td><td><font size=-1><em>Return bytes needed to store a quantity of PCM sample.</em> <a href="#a10"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>u_int8_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a11">snd_pcm_format_silence</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return 8 bit expressing silence for a PCM sample format.</em> <a href="#a11"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>u_int16_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a12">snd_pcm_format_silence_16</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return 16 bit expressing silence for a PCM sample format.</em> <a href="#a12"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>u_int32_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a13">snd_pcm_format_silence_32</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return 32 bit expressing silence for a PCM sample format.</em> <a href="#a13"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>u_int64_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a14">snd_pcm_format_silence_64</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Return 64 bit expressing silence for a PCM sample format.</em> <a href="#a14"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a15">snd_pcm_format_set_silence</a> (<a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format, void *buf, unsigned int samples)</td></tr>
<tr><td> </td><td><font size=-1><em>Silence a PCM samples buffer.</em> <a href="#a15"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="group___p_c_m.html#a18">snd_pcm_sframes_t</a> </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a16">snd_pcm_bytes_to_frames</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, ssize_t bytes)</td></tr>
<tr><td> </td><td><font size=-1><em>Convert bytes in frames for a PCM.</em> <a href="#a16"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>ssize_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a17">snd_pcm_frames_to_bytes</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#a18">snd_pcm_sframes_t</a> frames)</td></tr>
<tr><td> </td><td><font size=-1><em>Convert frames in bytes for a PCM.</em> <a href="#a17"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>long </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a18">snd_pcm_bytes_to_samples</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, ssize_t bytes)</td></tr>
<tr><td> </td><td><font size=-1><em>Convert bytes in samples for a PCM.</em> <a href="#a18"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>ssize_t </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a19">snd_pcm_samples_to_bytes</a> (<a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> *pcm, long samples)</td></tr>
<tr><td> </td><td><font size=-1><em>Convert samples in bytes for a PCM.</em> <a href="#a19"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a20">snd_pcm_area_silence</a> (const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> *dst_channel, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> dst_offset, unsigned int samples, <a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Silence an area.</em> <a href="#a20"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a21">snd_pcm_areas_silence</a> (const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> *dst_channels, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> dst_offset, unsigned int channels, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> frames, <a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Silence one or more areas.</em> <a href="#a21"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a22">snd_pcm_area_copy</a> (const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> *dst_channel, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> dst_offset, const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> *src_channel, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> src_offset, unsigned int samples, <a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Copy an area.</em> <a href="#a22"></a><em></em></font><br><br></td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="group___p_c_m___helpers.html#a23">snd_pcm_areas_copy</a> (const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> *dst_channels, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> dst_offset, const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> *src_channels, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> src_offset, unsigned int channels, <a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> frames, <a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> format)</td></tr>
<tr><td> </td><td><font size=-1><em>Copy one or more areas.</em> <a href="#a23"></a><em></em></font><br><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
See the <a href="pcm.html#pcm">PCM (digital audio) interface</a> page for more details. <hr><h2>Function Documentation</h2>
<a name="a22" doxytag="pcm.h::snd_pcm_area_copy"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_area_copy </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> * </td>
<td class="mdname" nowrap> <em>dst_area</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>dst_offset</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> * </td>
<td class="mdname" nowrap> <em>src_area</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>src_offset</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>samples</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>format</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Copy an area.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dst_area</em> </td><td>
destination area specification </td></tr>
<tr><td valign=top><em>dst_offset</em> </td><td>
offset in frames inside destination area </td></tr>
<tr><td valign=top><em>src_area</em> </td><td>
source area specification </td></tr>
<tr><td valign=top><em>src_offset</em> </td><td>
offset in frames inside source area </td></tr>
<tr><td valign=top><em>samples</em> </td><td>
samples to copy </td></tr>
<tr><td valign=top><em>format</em> </td><td>
PCM sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise a negative error code </dl> </td>
</tr>
</table>
<a name="a20" doxytag="pcm.h::snd_pcm_area_silence"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_area_silence </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> * </td>
<td class="mdname" nowrap> <em>dst_area</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>dst_offset</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>samples</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>format</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Silence an area.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dst_area</em> </td><td>
area specification </td></tr>
<tr><td valign=top><em>dst_offset</em> </td><td>
offset in frames inside area </td></tr>
<tr><td valign=top><em>samples</em> </td><td>
samples to silence </td></tr>
<tr><td valign=top><em>format</em> </td><td>
PCM sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise a negative error code </dl> </td>
</tr>
</table>
<a name="a23" doxytag="pcm.h::snd_pcm_areas_copy"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_areas_copy </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> * </td>
<td class="mdname" nowrap> <em>dst_areas</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>dst_offset</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> * </td>
<td class="mdname" nowrap> <em>src_areas</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>src_offset</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>channels</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>frames</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>format</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Copy one or more areas.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dst_areas</em> </td><td>
destination areas specification (one for each channel) </td></tr>
<tr><td valign=top><em>dst_offset</em> </td><td>
offset in frames inside destination area </td></tr>
<tr><td valign=top><em>src_areas</em> </td><td>
source areas specification (one for each channel) </td></tr>
<tr><td valign=top><em>src_offset</em> </td><td>
offset in frames inside source area </td></tr>
<tr><td valign=top><em>channels</em> </td><td>
channels count </td></tr>
<tr><td valign=top><em>frames</em> </td><td>
frames to copy </td></tr>
<tr><td valign=top><em>format</em> </td><td>
PCM sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise a negative error code </dl> </td>
</tr>
</table>
<a name="a21" doxytag="pcm.h::snd_pcm_areas_silence"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_areas_silence </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="group___p_c_m.html#a22">snd_pcm_channel_area_t</a> * </td>
<td class="mdname" nowrap> <em>dst_areas</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>dst_offset</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>channels</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a17">snd_pcm_uframes_t</a> </td>
<td class="mdname" nowrap> <em>frames</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>format</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Silence one or more areas.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dst_areas</em> </td><td>
areas specification (one for each channel) </td></tr>
<tr><td valign=top><em>dst_offset</em> </td><td>
offset in frames inside area </td></tr>
<tr><td valign=top><em>channels</em> </td><td>
channels count </td></tr>
<tr><td valign=top><em>frames</em> </td><td>
frames to silence </td></tr>
<tr><td valign=top><em>format</em> </td><td>
PCM sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 on success otherwise a negative error code </dl> </td>
</tr>
</table>
<a name="a9" doxytag="pcm.h::snd_pcm_build_linear_format"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> snd_pcm_build_linear_format </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>width</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>pwidth</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>unsignd</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>big_endian</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Compose a PCM sample linear format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>width</em> </td><td>
Nominal bits per sample </td></tr>
<tr><td valign=top><em>pwidth</em> </td><td>
Physical bit width of the format </td></tr>
<tr><td valign=top><em>unsignd</em> </td><td>
Sign: 0 signed, 1 unsigned </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
big_endian Endian: 0 little endian, 1 big endian </dl> </td>
</tr>
</table>
<a name="a16" doxytag="pcm.h::snd_pcm_bytes_to_frames"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="group___p_c_m.html#a18">snd_pcm_sframes_t</a> snd_pcm_bytes_to_frames </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> * </td>
<td class="mdname" nowrap> <em>pcm</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>ssize_t </td>
<td class="mdname" nowrap> <em>bytes</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Convert bytes in frames for a PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
<tr><td valign=top><em>bytes</em> </td><td>
quantity in bytes </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
quantity expressed in frames </dl> </td>
</tr>
</table>
<a name="a18" doxytag="pcm.h::snd_pcm_bytes_to_samples"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> long snd_pcm_bytes_to_samples </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> * </td>
<td class="mdname" nowrap> <em>pcm</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>ssize_t </td>
<td class="mdname" nowrap> <em>bytes</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Convert bytes in samples for a PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
<tr><td valign=top><em>bytes</em> </td><td>
quantity in bytes </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
quantity expressed in samples </dl> </td>
</tr>
</table>
<a name="a5" doxytag="pcm.h::snd_pcm_format_big_endian"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_big_endian </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return endian info for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 little endian, 1 big endian, a negative error code if endian independent </dl> </td>
</tr>
</table>
<a name="a6" doxytag="pcm.h::snd_pcm_format_cpu_endian"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_cpu_endian </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return endian info for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 swapped, 1 CPU endian, a negative error code if endian independent </dl> </td>
</tr>
</table>
<a name="a3" doxytag="pcm.h::snd_pcm_format_float"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_float </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return float info for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 non float, 1 float </dl> </td>
</tr>
</table>
<a name="a2" doxytag="pcm.h::snd_pcm_format_linear"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_linear </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return linear info for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 non linear, 1 linear </dl> </td>
</tr>
</table>
<a name="a4" doxytag="pcm.h::snd_pcm_format_little_endian"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_little_endian </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return endian info for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 big endian, 1 little endian, a negative error code if endian independent </dl> </td>
</tr>
</table>
<a name="a8" doxytag="pcm.h::snd_pcm_format_physical_width"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_physical_width </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return bits needed to store a PCM sample.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
bits per sample, a negative error code if not applicable </dl> </td>
</tr>
</table>
<a name="a15" doxytag="pcm.h::snd_pcm_format_set_silence"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_set_silence </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>format</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>void * </td>
<td class="mdname" nowrap> <em>data</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>samples</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Silence a PCM samples buffer.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
<tr><td valign=top><em>data</em> </td><td>
Buffer </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
samples Samples count </dl><dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a36">/test/latency.c</a>.</dl> </td>
</tr>
</table>
<a name="a0" doxytag="pcm.h::snd_pcm_format_signed"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_signed </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return sign info for a PCM sample linear format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 unsigned, 1 signed, a negative error code if format is not linear </dl> </td>
</tr>
</table>
<a name="a11" doxytag="pcm.h::snd_pcm_format_silence"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> u_int8_t snd_pcm_format_silence </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return 8 bit expressing silence for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
silence 8 bit word </dl> </td>
</tr>
</table>
<a name="a12" doxytag="pcm.h::snd_pcm_format_silence_16"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> u_int16_t snd_pcm_format_silence_16 </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return 16 bit expressing silence for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
silence 16 bit word </dl> </td>
</tr>
</table>
<a name="a13" doxytag="pcm.h::snd_pcm_format_silence_32"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> u_int32_t snd_pcm_format_silence_32 </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return 32 bit expressing silence for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
silence 32 bit word </dl> </td>
</tr>
</table>
<a name="a14" doxytag="pcm.h::snd_pcm_format_silence_64"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> u_int64_t snd_pcm_format_silence_64 </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return 64 bit expressing silence for a PCM sample format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
silence 64 bit word </dl> </td>
</tr>
</table>
<a name="a10" doxytag="pcm.h::snd_pcm_format_size"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> ssize_t snd_pcm_format_size </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname" nowrap> <em>format</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>samples</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return bytes needed to store a quantity of PCM sample.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
<tr><td valign=top><em>samples</em> </td><td>
Samples count </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
bytes needed, a negative error code if not integer or unknown </dl> </td>
</tr>
</table>
<a name="a1" doxytag="pcm.h::snd_pcm_format_unsigned"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_unsigned </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return sign info for a PCM sample linear format.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
0 signed, 1 unsigned, a negative error code if format is not linear </dl> </td>
</tr>
</table>
<a name="a7" doxytag="pcm.h::snd_pcm_format_width"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int snd_pcm_format_width </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a11">snd_pcm_format_t</a> </td>
<td class="mdname1" valign="top" nowrap> <em>format</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Return nominal bits per a PCM sample.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>format</em> </td><td>
Sample format </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
bits per sample, a negative error code if not applicable </dl><dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="_2test_2latency_8c-example.html#a29">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a41">/test/pcm.c</a>.</dl> </td>
</tr>
</table>
<a name="a17" doxytag="pcm.h::snd_pcm_frames_to_bytes"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> ssize_t snd_pcm_frames_to_bytes </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> * </td>
<td class="mdname" nowrap> <em>pcm</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group___p_c_m.html#a18">snd_pcm_sframes_t</a> </td>
<td class="mdname" nowrap> <em>frames</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Convert frames in bytes for a PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
<tr><td valign=top><em>frames</em> </td><td>
quantity in frames </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
quantity expressed in bytes </dl> </td>
</tr>
</table>
<a name="a19" doxytag="pcm.h::snd_pcm_samples_to_bytes"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> ssize_t snd_pcm_samples_to_bytes </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___p_c_m.html#a20">snd_pcm_t</a> * </td>
<td class="mdname" nowrap> <em>pcm</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>long </td>
<td class="mdname" nowrap> <em>samples</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Convert samples in bytes for a PCM.
<p>
<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>pcm</em> </td><td>
PCM handle </td></tr>
<tr><td valign=top><em>samples</em> </td><td>
quantity in samples </td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
quantity expressed in bytes </dl> </td>
</tr>
</table>
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