ets of a Theora stream.">th_decode_headerin()</a>. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>The initialized <a class="el" href="theoradec_8h.html#a843d70bb02563885a8d54b9c1a781729" title="The decoder context.">th_dec_ctx</a> handle. </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>NULL</em>&nbsp;</td><td>If the decoding parameters were invalid. </td></tr>
  </tab