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14<h1 align="left">AXRegisterCallback</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#include &lt;revolution/ax.h&gt;
19
20typedef void(*AXUserCallback)(void);
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22AXUserCallback AXRegisterCallback(AXUserCallback callback);
23</pre></dd></dl>
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25<h2>Arguments</h2>
26<TABLE class="arguments" border="1" >
27  <tr>
28<th>callback</th>
29<td>Callback to be registered.</td>
30  </tr>
31</table>
32
33<h2>Return Values</h2>
34<p>Pointer to the previous callback function.</p>
35
36<h2>Description</h2>
37<p>The <code>AXRegisterCallback</code> function registers a user-application callback that is invoked for each audio frame. An audio frame is three milliseconds in length. This function will replace the previously registered callback, if any. <strong>The user callback is invoked with interrupts disabled.</strong> Your application is responsible for enabling and restoring interrupts for non-critical sections, to ensure that other interrupt-driven services are handled promptly.</strong></p>
38
39<h2>See Also</h2>
40<p>None.</p>
41
42<H2>Revision History</H2>
43<P>
442006/08/03 Revised the audio frame length.<br>2006/03/01 Initial version.<BR>
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47<hr><p>CONFIDENTIAL</p></body>
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