>th_setup_info</a> *&nbsp;</td>
          <td class="paramname"> <em>_setup</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>Allocates a decoder instance. </p>
<p><b>Security Warning:</b> The Theora format supports very large frame sizes, potentially even larger than the address space of a 32-bit machine, and creating a decoder context allocates the space for several