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<html>
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<title>libao - datatype - ao_device</title>
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<td><p class=tiny>libao documentation</p></td>
<td align=right><p class=tiny>libao version 0.8.5 - 20040312</p></td>
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<h1>ao_device</h1>
<p><i>declared in "ao/ao.h";</i></p>
<p>This structure holds all of the data for an open device.
<br><br>
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<pre><b>typedef struct {
int type; /* live output or file output? */
int driver_id;
ao_functions *funcs;
FILE *file; /* File for output if this is a file driver */
int client_byte_format;
int machine_byte_format;
int driver_byte_format;
char *swap_buffer;
int swap_buffer_size; /* Bytes allocated to swap_buffer */
void *internal; /* Pointer to driver-specific data */
} ao_device;</b></pre>
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<h3>Relevant Struct Members</h3>
<dl>
<dt><i>type</i></dt>
<dd>The output type of the driver:
<ul>
<li>AO_TYPE_LIVE - Live output.</li>
<li>AO_TYPE_FILE - File output.</li>
</ul>
</dd>
<dt><i>driver_id</i></dt>
<dd>The ID number for the driver used with this device.</dd>
<dt><i>funcs</i></dt>
<dd>Function table for the driver associated with this device.</dd>
<dt><i>client_byte_format</i></dt>
<dd>The byte format (use constants from
<a href="ao_sample_format.html">ao_sample_format</a>) of samples provided by
the client to <a href="ao_sample_format.html">ao_play()</a>.
</dd>
<dt><i>machine_byte_format</i></dt>
<dd>The native byte format of the computer. Will be either
<tt>AO_FMT_BIG</tt> or <tt>AO_FMT_LITTLE</tt>.
</dd>
<dt><i>driver_byte_format</i></dt>
<dd>The byte format of samples requested by
the driver.
</dd>
<dt><i>swap_buffer</i></dt>
<dd>Scratch buffer used to swap the byte order of samples. Only allocated
if <tt>client_byte_format</tt> and <tt>driver_byte_format</tt> correspond to
different byte orders, otherwise set to NULL</dd>
</dl>
<br><br>
<hr noshade>
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<td><p class=tiny>copyright © 2001-2003 Stan Seibert</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/">xiph.org</a><br><a href="mailto:volsung@xiph.org">volsung@xiph.org</a></p></td>
</tr><tr>
<td><p class=tiny>libao documentation</p></td>
<td align=right><p class=tiny>libao version 0.8.5 - 20040312</p></td>
</tr>
</table>
</body>
</html>
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