an instance of the floating-point CFFT structure. </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">*p1</td><td>points to the complex data buffer of size <code>2*fftLen</code>. Processing occurs in-place. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">ifftFlag</td><td>flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">bitReverseFlag</td><td>flag that enables (bitReve