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<div class="title">arm_cfft_radix4_instance_q31 Struct Reference</div> </div>
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<p>Instance structure for the Q31 CFFT/CIFFT function.
</p>
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Data Fields</h2></td></tr>
<tr class="memitem:ab413d2a5d3f45fa187d93813bf3bf81b"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#ab413d2a5d3f45fa187d93813bf3bf81b">fftLen</a></td></tr>
<tr class="separator:ab413d2a5d3f45fa187d93813bf3bf81b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adc0a62ba669ad2282ecbe43d5d96abab"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#adc0a62ba669ad2282ecbe43d5d96abab">ifftFlag</a></td></tr>
<tr class="separator:adc0a62ba669ad2282ecbe43d5d96abab"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5a7c4f4c7b3fb655cbb2bc11ef160a2a"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#a5a7c4f4c7b3fb655cbb2bc11ef160a2a">bitReverseFlag</a></td></tr>
<tr class="separator:a5a7c4f4c7b3fb655cbb2bc11ef160a2a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a499e97268c131e20faea4b8565d4204c"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#a499e97268c131e20faea4b8565d4204c">pTwiddle</a></td></tr>
<tr class="separator:a499e97268c131e20faea4b8565d4204c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a64b58f7643b0e27c7f2d66ec0ef2e3dc"><td class="memItemLeft" align="right" valign="top">const uint16_t *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#a64b58f7643b0e27c7f2d66ec0ef2e3dc">pBitRevTable</a></td></tr>
<tr class="separator:a64b58f7643b0e27c7f2d66ec0ef2e3dc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8cf8187b8232815cf17ee82bf572ecf9"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#a8cf8187b8232815cf17ee82bf572ecf9">twidCoefModifier</a></td></tr>
<tr class="separator:a8cf8187b8232815cf17ee82bf572ecf9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a94d2fead4efa4d5eaae142bbe30b0e15"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q31.html#a94d2fead4efa4d5eaae142bbe30b0e15">bitRevFactor</a></td></tr>
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<h2 class="groupheader">Field Documentation</h2>
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<td class="memname">uint8_t arm_cfft_radix4_instance_q31::bitReverseFlag</td>
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<p>flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. </p>
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<td class="memname">uint16_t arm_cfft_radix4_instance_q31::bitRevFactor</td>
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<p>bit reversal modifier that supports different size FFTs with the same bit reversal table. </p>
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<td class="memname">uint16_t arm_cfft_radix4_instance_q31::fftLen</td>
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<p>length of the FFT. </p>
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<td class="memname">uint8_t arm_cfft_radix4_instance_q31::ifftFlag</td>
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<p>flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. </p>
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<td class="memname">const uint16_t* arm_cfft_radix4_instance_q31::pBitRevTable</td>
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<p>points to the bit reversal table. </p>
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<td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a>* arm_cfft_radix4_instance_q31::pTwiddle</td>
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<p>points to the twiddle factor table. </p>
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<td class="memname">uint16_t arm_cfft_radix4_instance_q31::twidCoefModifier</td>
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<p>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </p>
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