 ov_open_callbacks() is unsuccessful.<p>

See also <a href="callbacks.html">Callbacks and Non-stdio I/O</a> for
information on designing and specifying custom callback functions.<p>

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<pre><b>
int ov_open_callbacks(void *datasource, <a href="OggVorbis_File.html">OggVorbis_File</a> *vf, char *initial, long ibytes, <a href="ov_callbacks.html">ov_callbacks</a> callbacks);
</b></pre>
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<h3>Parameters