d>points to an instance of the Q31 CFFT/CIFFT structure. </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc</td><td>points to the complex data buffer of size <code>2*fftLen</code>. Processing occurs in-place. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>none.</dd></dl>
<dl class="section user"><dt>Input and output formats: </dt><dd></dd></dl>
<dl class="section user"><dt></dt><dd>Internally input is downscaled by 2 for every stage to avoid 