structarm__cfft__radix2__instance__q15.html 14 KB

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  117. <div class="title">arm_cfft_radix2_instance_q15 Struct Reference</div> </div>
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  119. <div class="contents">
  120. <p>Instance structure for the Q15 CFFT/CIFFT function.
  121. </p>
  122. <table class="memberdecls">
  123. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
  124. Data Fields</h2></td></tr>
  125. <tr class="memitem:a874085647351dcf3f0de39d2b1d49744"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix2__instance__q15.html#a874085647351dcf3f0de39d2b1d49744">fftLen</a></td></tr>
  126. <tr class="separator:a874085647351dcf3f0de39d2b1d49744"><td class="memSeparator" colspan="2">&#160;</td></tr>
  127. <tr class="memitem:ab5c073286bdd2f6e2bf783ced36bf1de"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix2__instance__q15.html#ab5c073286bdd2f6e2bf783ced36bf1de">ifftFlag</a></td></tr>
  128. <tr class="separator:ab5c073286bdd2f6e2bf783ced36bf1de"><td class="memSeparator" colspan="2">&#160;</td></tr>
  129. <tr class="memitem:af8300c1f60caa21e6b44b9240ab5af19"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix2__instance__q15.html#af8300c1f60caa21e6b44b9240ab5af19">bitReverseFlag</a></td></tr>
  130. <tr class="separator:af8300c1f60caa21e6b44b9240ab5af19"><td class="memSeparator" colspan="2">&#160;</td></tr>
  131. <tr class="memitem:a3809dd15e7cbf1a054c728cfbbb0cc5a"><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__radix2__instance__q15.html#a3809dd15e7cbf1a054c728cfbbb0cc5a">pTwiddle</a></td></tr>
  132. <tr class="separator:a3809dd15e7cbf1a054c728cfbbb0cc5a"><td class="memSeparator" colspan="2">&#160;</td></tr>
  133. <tr class="memitem:ab88afeff6493be3c8b5e4530efa82d51"><td class="memItemLeft" align="right" valign="top">uint16_t *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix2__instance__q15.html#ab88afeff6493be3c8b5e4530efa82d51">pBitRevTable</a></td></tr>
  134. <tr class="separator:ab88afeff6493be3c8b5e4530efa82d51"><td class="memSeparator" colspan="2">&#160;</td></tr>
  135. <tr class="memitem:a6f2ab87fb4c568656e1f92f687b5c850"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix2__instance__q15.html#a6f2ab87fb4c568656e1f92f687b5c850">twidCoefModifier</a></td></tr>
  136. <tr class="separator:a6f2ab87fb4c568656e1f92f687b5c850"><td class="memSeparator" colspan="2">&#160;</td></tr>
  137. <tr class="memitem:a8722720c542cabd41df83fe88ef4f4cb"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__cfft__radix2__instance__q15.html#a8722720c542cabd41df83fe88ef4f4cb">bitRevFactor</a></td></tr>
  138. <tr class="separator:a8722720c542cabd41df83fe88ef4f4cb"><td class="memSeparator" colspan="2">&#160;</td></tr>
  139. </table>
  140. <h2 class="groupheader">Field Documentation</h2>
  141. <a class="anchor" id="af8300c1f60caa21e6b44b9240ab5af19"></a>
  142. <div class="memitem">
  143. <div class="memproto">
  144. <table class="memname">
  145. <tr>
  146. <td class="memname">uint8_t arm_cfft_radix2_instance_q15::bitReverseFlag</td>
  147. </tr>
  148. </table>
  149. </div><div class="memdoc">
  150. <p>flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. </p>
  151. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>.</p>
  152. </div>
  153. </div>
  154. <a class="anchor" id="a8722720c542cabd41df83fe88ef4f4cb"></a>
  155. <div class="memitem">
  156. <div class="memproto">
  157. <table class="memname">
  158. <tr>
  159. <td class="memname">uint16_t arm_cfft_radix2_instance_q15::bitRevFactor</td>
  160. </tr>
  161. </table>
  162. </div><div class="memdoc">
  163. <p>bit reversal modifier that supports different size FFTs with the same bit reversal table. </p>
  164. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga55b424341dc3efd3fa0bcaaff4bdbf40">arm_cfft_radix2_q15()</a>.</p>
  165. </div>
  166. </div>
  167. <a class="anchor" id="a874085647351dcf3f0de39d2b1d49744"></a>
  168. <div class="memitem">
  169. <div class="memproto">
  170. <table class="memname">
  171. <tr>
  172. <td class="memname">uint16_t arm_cfft_radix2_instance_q15::fftLen</td>
  173. </tr>
  174. </table>
  175. </div><div class="memdoc">
  176. <p>length of the FFT. </p>
  177. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga55b424341dc3efd3fa0bcaaff4bdbf40">arm_cfft_radix2_q15()</a>.</p>
  178. </div>
  179. </div>
  180. <a class="anchor" id="ab5c073286bdd2f6e2bf783ced36bf1de"></a>
  181. <div class="memitem">
  182. <div class="memproto">
  183. <table class="memname">
  184. <tr>
  185. <td class="memname">uint8_t arm_cfft_radix2_instance_q15::ifftFlag</td>
  186. </tr>
  187. </table>
  188. </div><div class="memdoc">
  189. <p>flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. </p>
  190. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga55b424341dc3efd3fa0bcaaff4bdbf40">arm_cfft_radix2_q15()</a>.</p>
  191. </div>
  192. </div>
  193. <a class="anchor" id="ab88afeff6493be3c8b5e4530efa82d51"></a>
  194. <div class="memitem">
  195. <div class="memproto">
  196. <table class="memname">
  197. <tr>
  198. <td class="memname">uint16_t* arm_cfft_radix2_instance_q15::pBitRevTable</td>
  199. </tr>
  200. </table>
  201. </div><div class="memdoc">
  202. <p>points to the bit reversal table. </p>
  203. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga55b424341dc3efd3fa0bcaaff4bdbf40">arm_cfft_radix2_q15()</a>.</p>
  204. </div>
  205. </div>
  206. <a class="anchor" id="a3809dd15e7cbf1a054c728cfbbb0cc5a"></a>
  207. <div class="memitem">
  208. <div class="memproto">
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  210. <tr>
  211. <td class="memname"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>* arm_cfft_radix2_instance_q15::pTwiddle</td>
  212. </tr>
  213. </table>
  214. </div><div class="memdoc">
  215. <p>points to the Sin twiddle factor table. </p>
  216. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga55b424341dc3efd3fa0bcaaff4bdbf40">arm_cfft_radix2_q15()</a>.</p>
  217. </div>
  218. </div>
  219. <a class="anchor" id="a6f2ab87fb4c568656e1f92f687b5c850"></a>
  220. <div class="memitem">
  221. <div class="memproto">
  222. <table class="memname">
  223. <tr>
  224. <td class="memname">uint16_t arm_cfft_radix2_instance_q15::twidCoefModifier</td>
  225. </tr>
  226. </table>
  227. </div><div class="memdoc">
  228. <p>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </p>
  229. <p>Referenced by <a class="el" href="group___complex_f_f_t.html#ga5c5b2127b3c4ea2d03692127f8543858">arm_cfft_radix2_init_q15()</a>, and <a class="el" href="group___complex_f_f_t.html#ga55b424341dc3efd3fa0bcaaff4bdbf40">arm_cfft_radix2_q15()</a>.</p>
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