 decoded, though it must continue to be passed in on all subsequent calls. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>_setup</em>&nbsp;</td><td>Returns a pointer to additional, private setup information needed by the decoder. The contents of this pointer must be initialized to <code>NULL</code> on the first call, and the returned value must continue to be passed in on all subsequent calls. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>_op</em>&nbsp;</td><td>An <code>ogg_pa