structarm__rfft__instance__f32.html 13 KB

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  117. <div class="title">arm_rfft_instance_f32 Struct Reference</div> </div>
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  119. <div class="contents">
  120. <p>Instance structure for the floating-point RFFT/RIFFT 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:a4219d4669699e4efdcb150ed7a0d9a57"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#a4219d4669699e4efdcb150ed7a0d9a57">fftLenReal</a></td></tr>
  126. <tr class="separator:a4219d4669699e4efdcb150ed7a0d9a57"><td class="memSeparator" colspan="2">&#160;</td></tr>
  127. <tr class="memitem:a075076e07ebb8521d8e3b49a31db6c57"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#a075076e07ebb8521d8e3b49a31db6c57">fftLenBy2</a></td></tr>
  128. <tr class="separator:a075076e07ebb8521d8e3b49a31db6c57"><td class="memSeparator" colspan="2">&#160;</td></tr>
  129. <tr class="memitem:a5ee6d10a934ab4b666e0bb286c3d633f"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#a5ee6d10a934ab4b666e0bb286c3d633f">ifftFlagR</a></td></tr>
  130. <tr class="separator:a5ee6d10a934ab4b666e0bb286c3d633f"><td class="memSeparator" colspan="2">&#160;</td></tr>
  131. <tr class="memitem:ac342f3248157cbbd2f04a3c8ec9fc9eb"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#ac342f3248157cbbd2f04a3c8ec9fc9eb">bitReverseFlagR</a></td></tr>
  132. <tr class="separator:ac342f3248157cbbd2f04a3c8ec9fc9eb"><td class="memSeparator" colspan="2">&#160;</td></tr>
  133. <tr class="memitem:aede85350fb5ae6baa1b3e8bfa15b18d6"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#aede85350fb5ae6baa1b3e8bfa15b18d6">twidCoefRModifier</a></td></tr>
  134. <tr class="separator:aede85350fb5ae6baa1b3e8bfa15b18d6"><td class="memSeparator" colspan="2">&#160;</td></tr>
  135. <tr class="memitem:aac5a79a077f3ecbca6e85ba582b33691"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#aac5a79a077f3ecbca6e85ba582b33691">pTwiddleAReal</a></td></tr>
  136. <tr class="separator:aac5a79a077f3ecbca6e85ba582b33691"><td class="memSeparator" colspan="2">&#160;</td></tr>
  137. <tr class="memitem:a8c5c8de5d526d3bb9527954ec5c585c9"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#a8c5c8de5d526d3bb9527954ec5c585c9">pTwiddleBReal</a></td></tr>
  138. <tr class="separator:a8c5c8de5d526d3bb9527954ec5c585c9"><td class="memSeparator" colspan="2">&#160;</td></tr>
  139. <tr class="memitem:a9f47ba9f50c81e4445ae3827b981bc05"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structarm__cfft__radix4__instance__f32.html">arm_cfft_radix4_instance_f32</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structarm__rfft__instance__f32.html#a9f47ba9f50c81e4445ae3827b981bc05">pCfft</a></td></tr>
  140. <tr class="separator:a9f47ba9f50c81e4445ae3827b981bc05"><td class="memSeparator" colspan="2">&#160;</td></tr>
  141. </table>
  142. <h2 class="groupheader">Field Documentation</h2>
  143. <a class="anchor" id="ac342f3248157cbbd2f04a3c8ec9fc9eb"></a>
  144. <div class="memitem">
  145. <div class="memproto">
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  147. <tr>
  148. <td class="memname">uint8_t arm_rfft_instance_f32::bitReverseFlagR</td>
  149. </tr>
  150. </table>
  151. </div><div class="memdoc">
  152. <p>flag that enables (bitReverseFlagR=1) or disables (bitReverseFlagR=0) bit reversal of output. </p>
  153. </div>
  154. </div>
  155. <a class="anchor" id="a075076e07ebb8521d8e3b49a31db6c57"></a>
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  158. <table class="memname">
  159. <tr>
  160. <td class="memname">uint16_t arm_rfft_instance_f32::fftLenBy2</td>
  161. </tr>
  162. </table>
  163. </div><div class="memdoc">
  164. <p>length of the complex FFT. </p>
  165. </div>
  166. </div>
  167. <a class="anchor" id="a4219d4669699e4efdcb150ed7a0d9a57"></a>
  168. <div class="memitem">
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  171. <tr>
  172. <td class="memname">uint32_t arm_rfft_instance_f32::fftLenReal</td>
  173. </tr>
  174. </table>
  175. </div><div class="memdoc">
  176. <p>length of the real FFT. </p>
  177. </div>
  178. </div>
  179. <a class="anchor" id="a5ee6d10a934ab4b666e0bb286c3d633f"></a>
  180. <div class="memitem">
  181. <div class="memproto">
  182. <table class="memname">
  183. <tr>
  184. <td class="memname">uint8_t arm_rfft_instance_f32::ifftFlagR</td>
  185. </tr>
  186. </table>
  187. </div><div class="memdoc">
  188. <p>flag that selects forward (ifftFlagR=0) or inverse (ifftFlagR=1) transform. </p>
  189. </div>
  190. </div>
  191. <a class="anchor" id="a9f47ba9f50c81e4445ae3827b981bc05"></a>
  192. <div class="memitem">
  193. <div class="memproto">
  194. <table class="memname">
  195. <tr>
  196. <td class="memname"><a class="el" href="structarm__cfft__radix4__instance__f32.html">arm_cfft_radix4_instance_f32</a>* arm_rfft_instance_f32::pCfft</td>
  197. </tr>
  198. </table>
  199. </div><div class="memdoc">
  200. <p>points to the complex FFT instance. </p>
  201. </div>
  202. </div>
  203. <a class="anchor" id="aac5a79a077f3ecbca6e85ba582b33691"></a>
  204. <div class="memitem">
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  207. <tr>
  208. <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>* arm_rfft_instance_f32::pTwiddleAReal</td>
  209. </tr>
  210. </table>
  211. </div><div class="memdoc">
  212. <p>points to the real twiddle factor table. </p>
  213. </div>
  214. </div>
  215. <a class="anchor" id="a8c5c8de5d526d3bb9527954ec5c585c9"></a>
  216. <div class="memitem">
  217. <div class="memproto">
  218. <table class="memname">
  219. <tr>
  220. <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a>* arm_rfft_instance_f32::pTwiddleBReal</td>
  221. </tr>
  222. </table>
  223. </div><div class="memdoc">
  224. <p>points to the imag twiddle factor table. </p>
  225. </div>
  226. </div>
  227. <a class="anchor" id="aede85350fb5ae6baa1b3e8bfa15b18d6"></a>
  228. <div class="memitem">
  229. <div class="memproto">
  230. <table class="memname">
  231. <tr>
  232. <td class="memname">uint32_t arm_rfft_instance_f32::twidCoefRModifier</td>
  233. </tr>
  234. </table>
  235. </div><div class="memdoc">
  236. <p>twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. </p>
  237. </div>
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