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<div class="title">arm_cfft_radix4_instance_q15 Struct Reference</div>  </div>
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<p>Instance structure for the Q15 CFFT/CIFFT function.  
</p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr class="memitem:a5fc543e7d84ca8cb7cf6648970f21ca6"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#a5fc543e7d84ca8cb7cf6648970f21ca6">fftLen</a></td></tr>
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<tr class="memitem:a2ecff6ea735cb4d22e922d0fd5736655"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#a2ecff6ea735cb4d22e922d0fd5736655">ifftFlag</a></td></tr>
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<tr class="memitem:a101e3f7b0bd6b5b14cd5214f23df4133"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#a101e3f7b0bd6b5b14cd5214f23df4133">bitReverseFlag</a></td></tr>
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<tr class="memitem:a29dd693537e45421a36891f8439e1fba"><td class="memItemLeft" align="right" valign="top"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#a29dd693537e45421a36891f8439e1fba">pTwiddle</a></td></tr>
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<tr class="memitem:a4acf704ae0cf30b53bf0fbfae8e34a59"><td class="memItemLeft" align="right" valign="top">uint16_t *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#a4acf704ae0cf30b53bf0fbfae8e34a59">pBitRevTable</a></td></tr>
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<tr class="memitem:af32fdc78bcc27ca385f9b76a0a1f71c3"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#af32fdc78bcc27ca385f9b76a0a1f71c3">twidCoefModifier</a></td></tr>
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<tr class="memitem:a6b010e5f02d1130c621e3d2e26b95df1"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix4__instance__q15.html#a6b010e5f02d1130c621e3d2e26b95df1">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_q15::bitReverseFlag</td>
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<p>flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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          <td class="memname">uint16_t arm_cfft_radix4_instance_q15::bitRevFactor</td>
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<p>bit reversal modifier that supports different size FFTs with the same bit reversal table. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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          <td class="memname">uint16_t arm_cfft_radix4_instance_q15::fftLen</td>
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<p>length of the FFT. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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          <td class="memname">uint8_t arm_cfft_radix4_instance_q15::ifftFlag</td>
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<p>flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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<a class="anchor" id="a4acf704ae0cf30b53bf0fbfae8e34a59"></a>
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<p>points to the bit reversal table. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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          <td class="memname"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>* arm_cfft_radix4_instance_q15::pTwiddle</td>
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<p>points to the twiddle factor table. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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<a class="anchor" id="af32fdc78bcc27ca385f9b76a0a1f71c3"></a>
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<p>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </p>

<p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga0c2acfda3126c452e75b81669e8ad9ef">arm_cfft_radix4_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga8d66cdac41b8bf6cefdb895456eee84a">arm_cfft_radix4_q15()</a>.</p>

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