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  49 <div class="header">
  50   <div class="summary">
  51 <a href="#func-members">Functions</a>  </div>
  52   <div class="headertitle">
  53 <h1>arm_cfft_radix4_q31.c File Reference</h1>  </div>
  54 </div>
  55 <div class="contents">
  56 <code>#include &quot;<a class="el" href="arm__math_8h_source.html">arm_math.h</a>&quot;</code><br/>
  57
  58 <p><a href="arm__cfft__radix4__q31_8c_source.html">Go to the source code of this file.</a></p>
  59 <table class="memberdecls">
  60 <tr><td colspan="2"><h2><a name="func-members"></a>
  61 Functions</h2></td></tr>
  62 <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_f_f_t___c_i_f_f_t.html#gafde3ee1f58cf393b45a9073174fff548">arm_cfft_radix4_q31</a> (const <a class="el" href="structarm__cfft__radix4__instance__q31.html">arm_cfft_radix4_instance_q31</a> *S, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc)</td></tr>
  63 <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__radix4__q31_8c.html#ac12f1e7f159d5741358cdc36830a0395">arm_radix4_butterfly_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t fftLen, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pCoef, uint32_t twidCoefModifier)</td></tr>
  64 <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__radix4__q31_8c.html#ac9c7c553114c1201a3a987a11b8a6d01">arm_radix4_butterfly_inverse_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t fftLen, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pCoef, uint32_t twidCoefModifier)</td></tr>
  65 <tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="arm__cfft__radix4__q31_8c.html#a27618705158b5c42db5fb0a381f8efc1">arm_bitreversal_q31</a> (<a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrc, uint32_t fftLen, uint16_t bitRevFactor, uint16_t *pBitRevTable)</td></tr>
  66 </table>
  67 <hr/><h2>Function Documentation</h2>
  68 <a class="anchor" id="ac12f1e7f159d5741358cdc36830a0395"></a><!-- doxytag: member="arm_cfft_radix4_q31.c::arm_radix4_butterfly_q31" ref="ac12f1e7f159d5741358cdc36830a0395" args="(q31_t *pSrc, uint32_t fftLen, q31_t *pCoef, uint32_t twidCoefModifier)" -->
  69 <div class="memitem">
  70 <div class="memproto">
  71       <table class="memname">
  72         <tr>
  73           <td class="memname">void arm_radix4_butterfly_q31 </td>
  74           <td>(</td>
  75           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
  76           <td class="paramname"> <em>pSrc</em>, </td>
  77         </tr>
  78         <tr>
  79           <td class="paramkey"></td>
  80           <td></td>
  81           <td class="paramtype">uint32_t&#160;</td>
  82           <td class="paramname"> <em>fftLen</em>, </td>
  83         </tr>
  84         <tr>
  85           <td class="paramkey"></td>
  86           <td></td>
  87           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
  88           <td class="paramname"> <em>pCoef</em>, </td>
  89         </tr>
  90         <tr>
  91           <td class="paramkey"></td>
  92           <td></td>
  93           <td class="paramtype">uint32_t&#160;</td>
  94           <td class="paramname"> <em>twidCoefModifier</em>&#160;</td>
  95         </tr>
  96         <tr>
  97           <td></td>
  98           <td>)</td>
  99           <td></td><td></td>
 100         </tr>
 101       </table>
 102 </div>
 103 <div class="memdoc">
 104
 105 <p>Core function for the Q31 CFFT butterfly process. </p>
 106 <p>end of CFFT_CIFFT group </p>
 107 <dl><dt><b>Parameters:</b></dt><dd>
 108   <table class="params">
 109     <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc</td><td>points to the in-place buffer of Q31 data type. </td></tr>
 110     <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
 111     <tr><td class="paramdir">[in]</td><td class="paramname">*pCoef</td><td>points to twiddle coefficient buffer. </td></tr>
 112     <tr><td class="paramdir">[in]</td><td class="paramname">twidCoefModifier</td><td>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </td></tr>
 113   </table>
 114   </dd>
 115 </dl>
 116 <dl class="return"><dt><b>Returns:</b></dt><dd>none. </dd></dl>
 117
 118 <p>Definition at line <a class="el" href="arm__cfft__radix4__q31_8c_source.html#l00139">139</a> of file <a class="el" href="arm__cfft__radix4__q31_8c_source.html">arm_cfft_radix4_q31.c</a>.</p>
 119
 120 </div>
 121 </div>
 122 <a class="anchor" id="ac9c7c553114c1201a3a987a11b8a6d01"></a><!-- doxytag: member="arm_cfft_radix4_q31.c::arm_radix4_butterfly_inverse_q31" ref="ac9c7c553114c1201a3a987a11b8a6d01" args="(q31_t *pSrc, uint32_t fftLen, q31_t *pCoef, uint32_t twidCoefModifier)" -->
 123 <div class="memitem">
 124 <div class="memproto">
 125       <table class="memname">
 126         <tr>
 127           <td class="memname">void arm_radix4_butterfly_inverse_q31 </td>
 128           <td>(</td>
 129           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
 130           <td class="paramname"> <em>pSrc</em>, </td>
 131         </tr>
 132         <tr>
 133           <td class="paramkey"></td>
 134           <td></td>
 135           <td class="paramtype">uint32_t&#160;</td>
 136           <td class="paramname"> <em>fftLen</em>, </td>
 137         </tr>
 138         <tr>
 139           <td class="paramkey"></td>
 140           <td></td>
 141           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
 142           <td class="paramname"> <em>pCoef</em>, </td>
 143         </tr>
 144         <tr>
 145           <td class="paramkey"></td>
 146           <td></td>
 147           <td class="paramtype">uint32_t&#160;</td>
 148           <td class="paramname"> <em>twidCoefModifier</em>&#160;</td>
 149         </tr>
 150         <tr>
 151           <td></td>
 152           <td>)</td>
 153           <td></td><td></td>
 154         </tr>
 155       </table>
 156 </div>
 157 <div class="memdoc">
 158
 159 <p>Core function for the Q31 CIFFT butterfly process. </p>
 160 <dl><dt><b>Parameters:</b></dt><dd>
 161   <table class="params">
 162     <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc</td><td>points to the in-place buffer of Q31 data type. </td></tr>
 163     <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
 164     <tr><td class="paramdir">[in]</td><td class="paramname">*pCoef</td><td>points to twiddle coefficient buffer. </td></tr>
 165     <tr><td class="paramdir">[in]</td><td class="paramname">twidCoefModifier</td><td>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </td></tr>
 166   </table>
 167   </dd>
 168 </dl>
 169 <dl class="return"><dt><b>Returns:</b></dt><dd>none. </dd></dl>
 170
 171 <p>Definition at line <a class="el" href="arm__cfft__radix4__q31_8c_source.html#l00517">517</a> of file <a class="el" href="arm__cfft__radix4__q31_8c_source.html">arm_cfft_radix4_q31.c</a>.</p>
 172
 173 </div>
 174 </div>
 175 <a class="anchor" id="a27618705158b5c42db5fb0a381f8efc1"></a><!-- doxytag: member="arm_cfft_radix4_q31.c::arm_bitreversal_q31" ref="a27618705158b5c42db5fb0a381f8efc1" args="(q31_t *pSrc, uint32_t fftLen, uint16_t bitRevFactor, uint16_t *pBitRevTable)" -->
 176 <div class="memitem">
 177 <div class="memproto">
 178       <table class="memname">
 179         <tr>
 180           <td class="memname">void arm_bitreversal_q31 </td>
 181           <td>(</td>
 182           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
 183           <td class="paramname"> <em>pSrc</em>, </td>
 184         </tr>
 185         <tr>
 186           <td class="paramkey"></td>
 187           <td></td>
 188           <td class="paramtype">uint32_t&#160;</td>
 189           <td class="paramname"> <em>fftLen</em>, </td>
 190         </tr>
 191         <tr>
 192           <td class="paramkey"></td>
 193           <td></td>
 194           <td class="paramtype">uint16_t&#160;</td>
 195           <td class="paramname"> <em>bitRevFactor</em>, </td>
 196         </tr>
 197         <tr>
 198           <td class="paramkey"></td>
 199           <td></td>
 200           <td class="paramtype">uint16_t *&#160;</td>
 201           <td class="paramname"> <em>pBitRevTab</em>&#160;</td>
 202         </tr>
 203         <tr>
 204           <td></td>
 205           <td>)</td>
 206           <td></td><td></td>
 207         </tr>
 208       </table>
 209 </div>
 210 <div class="memdoc">
 211
 212 <p>In-place bit reversal function. </p>
 213 <dl><dt><b>Parameters:</b></dt><dd>
 214   <table class="params">
 215     <tr><td class="paramdir">[in,out]</td><td class="paramname">*pSrc</td><td>points to the in-place buffer of Q31 data type. </td></tr>
 216     <tr><td class="paramdir">[in]</td><td class="paramname">fftLen</td><td>length of the FFT. </td></tr>
 217     <tr><td class="paramdir">[in]</td><td class="paramname">bitRevFactor</td><td>bit reversal modifier that supports different size FFTs with the same bit reversal table </td></tr>
 218     <tr><td class="paramdir">[in]</td><td class="paramname">*pBitRevTab</td><td>points to bit reversal table. </td></tr>
 219   </table>
 220   </dd>
 221 </dl>
 222 <dl class="return"><dt><b>Returns:</b></dt><dd>none. </dd></dl>
 223
 224 <p>Definition at line <a class="el" href="arm__cfft__radix4__q31_8c_source.html#l00848">848</a> of file <a class="el" href="arm__cfft__radix4__q31_8c_source.html">arm_cfft_radix4_q31.c</a>.</p>
 225
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