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  118. Variables</h2></td></tr>
    119. 

  119. <tr class="memitem:gae247e83ad50d474107254e25b36ad42b"><td class="memItemLeft" align="right" valign="top">const uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gae247e83ad50d474107254e25b36ad42b">armBitRevTable</a> [1024]</td></tr>
    120. 

  120. <tr class="memdesc:gae247e83ad50d474107254e25b36ad42b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Table for bit reversal process.  <a href="#gae247e83ad50d474107254e25b36ad42b">More...</a><br/></td></tr>
    121. 

  121. <tr class="separator:gae247e83ad50d474107254e25b36ad42b"><td class="memSeparator" colspan="2">&#160;</td></tr>
    122. 

  122. <tr class="memitem:gae75e243ec61706427314270f222e0c8e"><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="group__CFFT__CIFFT.html#gae75e243ec61706427314270f222e0c8e">twiddleCoef_16</a> [32]</td></tr>
    123. 

  123. <tr class="memdesc:gae75e243ec61706427314270f222e0c8e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Floating-point Twiddle factors Table Generation.  <a href="#gae75e243ec61706427314270f222e0c8e">More...</a><br/></td></tr>
    124. 

  124. <tr class="separator:gae75e243ec61706427314270f222e0c8e"><td class="memSeparator" colspan="2">&#160;</td></tr>
    125. 

  125. <tr class="memitem:ga78a72c85d88185de98050c930cfc76e3"><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="group__CFFT__CIFFT.html#ga78a72c85d88185de98050c930cfc76e3">twiddleCoef_32</a> [64]</td></tr>
    126. 

  126. <tr class="separator:ga78a72c85d88185de98050c930cfc76e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
    127. 

  127. <tr class="memitem:ga4f3c6d98c7e66393b4ef3ac63746e43d"><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="group__CFFT__CIFFT.html#ga4f3c6d98c7e66393b4ef3ac63746e43d">twiddleCoef_64</a> [128]</td></tr>
    128. 

  128. <tr class="separator:ga4f3c6d98c7e66393b4ef3ac63746e43d"><td class="memSeparator" colspan="2">&#160;</td></tr>
    129. 

  129. <tr class="memitem:ga948433536dafaac1381decfccf4e2d9c"><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="group__CFFT__CIFFT.html#ga948433536dafaac1381decfccf4e2d9c">twiddleCoef_128</a> [256]</td></tr>
    130. 

  130. <tr class="separator:ga948433536dafaac1381decfccf4e2d9c"><td class="memSeparator" colspan="2">&#160;</td></tr>
    131. 

  131. <tr class="memitem:gafe813758a03a798e972359a092315be4"><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="group__CFFT__CIFFT.html#gafe813758a03a798e972359a092315be4">twiddleCoef_256</a> [512]</td></tr>
    132. 

  132. <tr class="separator:gafe813758a03a798e972359a092315be4"><td class="memSeparator" colspan="2">&#160;</td></tr>
    133. 

  133. <tr class="memitem:gad8830f0c068ab2cc19f2f87d220fa148"><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="group__CFFT__CIFFT.html#gad8830f0c068ab2cc19f2f87d220fa148">twiddleCoef_512</a> [1024]</td></tr>
    134. 

  134. <tr class="separator:gad8830f0c068ab2cc19f2f87d220fa148"><td class="memSeparator" colspan="2">&#160;</td></tr>
    135. 

  135. <tr class="memitem:ga27c056eb130a4333d1cc5dd43ec738b1"><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="group__CFFT__CIFFT.html#ga27c056eb130a4333d1cc5dd43ec738b1">twiddleCoef_1024</a> [2048]</td></tr>
    136. 

  136. <tr class="separator:ga27c056eb130a4333d1cc5dd43ec738b1"><td class="memSeparator" colspan="2">&#160;</td></tr>
    137. 

  137. <tr class="memitem:ga23e7f30421a7905b21c2015429779633"><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="group__CFFT__CIFFT.html#ga23e7f30421a7905b21c2015429779633">twiddleCoef_2048</a> [4096]</td></tr>
    138. 

  138. <tr class="separator:ga23e7f30421a7905b21c2015429779633"><td class="memSeparator" colspan="2">&#160;</td></tr>
    139. 

  139. <tr class="memitem:gae0182d1dd3b2f21aad4e38a815a0bd40"><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="group__CFFT__CIFFT.html#gae0182d1dd3b2f21aad4e38a815a0bd40">twiddleCoef_4096</a> [8192]</td></tr>
    140. 

  140. <tr class="separator:gae0182d1dd3b2f21aad4e38a815a0bd40"><td class="memSeparator" colspan="2">&#160;</td></tr>
    141. 

  141. <tr class="memitem:gaef4697e1ba348c4ac9358f2b9e279e93"><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="group__CFFT__CIFFT.html#gaef4697e1ba348c4ac9358f2b9e279e93">twiddleCoef_16_q31</a> [24]</td></tr>
    142. 

  142. <tr class="memdesc:gaef4697e1ba348c4ac9358f2b9e279e93"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q31 Twiddle factors Table.  <a href="#gaef4697e1ba348c4ac9358f2b9e279e93">More...</a><br/></td></tr>
    143. 

  143. <tr class="separator:gaef4697e1ba348c4ac9358f2b9e279e93"><td class="memSeparator" colspan="2">&#160;</td></tr>
    144. 

  144. <tr class="memitem:ga8ba78d5e6ef4bdc58e8f0044e0664a0a"><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="group__CFFT__CIFFT.html#ga8ba78d5e6ef4bdc58e8f0044e0664a0a">twiddleCoef_32_q31</a> [48]</td></tr>
    145. 

  145. <tr class="separator:ga8ba78d5e6ef4bdc58e8f0044e0664a0a"><td class="memSeparator" colspan="2">&#160;</td></tr>
    146. 

  146. <tr class="memitem:ga6e0a7e941a25a0d74b2e6590307de47e"><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="group__CFFT__CIFFT.html#ga6e0a7e941a25a0d74b2e6590307de47e">twiddleCoef_64_q31</a> [96]</td></tr>
    147. 

  147. <tr class="separator:ga6e0a7e941a25a0d74b2e6590307de47e"><td class="memSeparator" colspan="2">&#160;</td></tr>
    148. 

  148. <tr class="memitem:gafecf9ed9873415d9f5f17f37b30c7250"><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="group__CFFT__CIFFT.html#gafecf9ed9873415d9f5f17f37b30c7250">twiddleCoef_128_q31</a> [192]</td></tr>
    149. 

  149. <tr class="separator:gafecf9ed9873415d9f5f17f37b30c7250"><td class="memSeparator" colspan="2">&#160;</td></tr>
    150. 

  150. <tr class="memitem:gaef1ea005053b715b851cf5f908168ede"><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="group__CFFT__CIFFT.html#gaef1ea005053b715b851cf5f908168ede">twiddleCoef_256_q31</a> [384]</td></tr>
    151. 

  151. <tr class="separator:gaef1ea005053b715b851cf5f908168ede"><td class="memSeparator" colspan="2">&#160;</td></tr>
    152. 

  152. <tr class="memitem:ga416c61b2f08542a39111e06b0378bebe"><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="group__CFFT__CIFFT.html#ga416c61b2f08542a39111e06b0378bebe">twiddleCoef_512_q31</a> [768]</td></tr>
    153. 

  153. <tr class="separator:ga416c61b2f08542a39111e06b0378bebe"><td class="memSeparator" colspan="2">&#160;</td></tr>
    154. 

  154. <tr class="memitem:ga514443c44b62b8b3d240afefebcda310"><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="group__CFFT__CIFFT.html#ga514443c44b62b8b3d240afefebcda310">twiddleCoef_1024_q31</a> [1536]</td></tr>
    155. 

  155. <tr class="separator:ga514443c44b62b8b3d240afefebcda310"><td class="memSeparator" colspan="2">&#160;</td></tr>
    156. 

  156. <tr class="memitem:ga9c5767de9f5a409fd0c2027e6ac67179"><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="group__CFFT__CIFFT.html#ga9c5767de9f5a409fd0c2027e6ac67179">twiddleCoef_2048_q31</a> [3072]</td></tr>
    157. 

  157. <tr class="separator:ga9c5767de9f5a409fd0c2027e6ac67179"><td class="memSeparator" colspan="2">&#160;</td></tr>
    158. 

  158. <tr class="memitem:ga67c0890317deab3391e276f22c1fc400"><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="group__CFFT__CIFFT.html#ga67c0890317deab3391e276f22c1fc400">twiddleCoef_4096_q31</a> [6144]</td></tr>
    159. 

  159. <tr class="separator:ga67c0890317deab3391e276f22c1fc400"><td class="memSeparator" colspan="2">&#160;</td></tr>
    160. 

  160. <tr class="memitem:ga8e4e2e05f4a3112184c96cb3308d6c39"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8e4e2e05f4a3112184c96cb3308d6c39">twiddleCoef_16_q15</a> [24]</td></tr>
    161. 

  161. <tr class="memdesc:ga8e4e2e05f4a3112184c96cb3308d6c39"><td class="mdescLeft">&#160;</td><td class="mdescRight">q15 Twiddle factors Table  <a href="#ga8e4e2e05f4a3112184c96cb3308d6c39">More...</a><br/></td></tr>
    162. 

  162. <tr class="separator:ga8e4e2e05f4a3112184c96cb3308d6c39"><td class="memSeparator" colspan="2">&#160;</td></tr>
    163. 

  163. <tr class="memitem:gac194a4fe04a19051ae1811f69c6e5df2"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gac194a4fe04a19051ae1811f69c6e5df2">twiddleCoef_32_q15</a> [48]</td></tr>
    164. 

  164. <tr class="separator:gac194a4fe04a19051ae1811f69c6e5df2"><td class="memSeparator" colspan="2">&#160;</td></tr>
    165. 

  165. <tr class="memitem:gaa0cc411e0b3c82078e85cfdf1b84290f"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gaa0cc411e0b3c82078e85cfdf1b84290f">twiddleCoef_64_q15</a> [96]</td></tr>
    166. 

  166. <tr class="separator:gaa0cc411e0b3c82078e85cfdf1b84290f"><td class="memSeparator" colspan="2">&#160;</td></tr>
    167. 

  167. <tr class="memitem:gabfdd1c5cd2b3f96da5fe5f07c707a8e5"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gabfdd1c5cd2b3f96da5fe5f07c707a8e5">twiddleCoef_128_q15</a> [192]</td></tr>
    168. 

  168. <tr class="separator:gabfdd1c5cd2b3f96da5fe5f07c707a8e5"><td class="memSeparator" colspan="2">&#160;</td></tr>
    169. 

  169. <tr class="memitem:ga6099ae5262a0a3a8d9ce1e6da02f0c2e"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6099ae5262a0a3a8d9ce1e6da02f0c2e">twiddleCoef_256_q15</a> [384]</td></tr>
    170. 

  170. <tr class="separator:ga6099ae5262a0a3a8d9ce1e6da02f0c2e"><td class="memSeparator" colspan="2">&#160;</td></tr>
    171. 

  171. <tr class="memitem:ga6152621af210f847128c6f38958fa385"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga6152621af210f847128c6f38958fa385">twiddleCoef_512_q15</a> [768]</td></tr>
    172. 

  172. <tr class="separator:ga6152621af210f847128c6f38958fa385"><td class="memSeparator" colspan="2">&#160;</td></tr>
    173. 

  173. <tr class="memitem:ga8a0ec95d866fe96b740e77d6e1356b59"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga8a0ec95d866fe96b740e77d6e1356b59">twiddleCoef_1024_q15</a> [1536]</td></tr>
    174. 

  174. <tr class="separator:ga8a0ec95d866fe96b740e77d6e1356b59"><td class="memSeparator" colspan="2">&#160;</td></tr>
    175. 

  175. <tr class="memitem:gadd16ce08ffd1048c385e0534a3b19cbb"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#gadd16ce08ffd1048c385e0534a3b19cbb">twiddleCoef_2048_q15</a> [3072]</td></tr>
    176. 

  176. <tr class="separator:gadd16ce08ffd1048c385e0534a3b19cbb"><td class="memSeparator" colspan="2">&#160;</td></tr>
    177. 

  177. <tr class="memitem:ga9b409d6995eab17805b1d1881d4bc652"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__CFFT__CIFFT.html#ga9b409d6995eab17805b1d1881d4bc652">twiddleCoef_4096_q15</a> [6144]</td></tr>
    178. 

  178. <tr class="separator:ga9b409d6995eab17805b1d1881d4bc652"><td class="memSeparator" colspan="2">&#160;</td></tr>
    179. 

  179. </table>
    180. 

  180. <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
    181. 

  181. <h2 class="groupheader">Variable Documentation</h2>
    182. 

  182. <a class="anchor" id="gae247e83ad50d474107254e25b36ad42b"></a>
    183. 

  183. <div class="memitem">
    184. 

  184. <div class="memproto">
    185. 

  185.       <table class="memname">
    186. 

  186.         <tr>
    187. 

  187.           <td class="memname">const uint16_t armBitRevTable[1024]</td>
    188. 

  188.         </tr>
    189. 

  189.       </table>
    190. 

  190. </div><div class="memdoc">
    191. 

  191. <dl class="section user"><dt></dt><dd>Pseudo code for Generation of Bit reversal Table is </dd></dl>
    192. 

  192. <dl class="section user"><dt></dt><dd><pre>for (l = 1; l &lt;= N/4; l++)
    193. 

  193. {
    194. 

  194.   for (i = 0; i&lt; logN2; i++)
    195. 

  195.   {
    196. 

  196.     a[i] = l &amp; (1 &lt;&lt; i);
    197. 

  197.   }
    198. 

  198.   for (j = 0; j &lt; logN2; j++)
    199. 

  199.   {
    200. 

  200.     if (a[j] != 0)
    201. 

  201.     y[l] += (1 &lt;&lt; ((logN2 - 1) - j));
    202. 

  202.   }
    203. 

  203.   y[l] = y[l] &gt;&gt; 1;
    204. 

  204.  } </pre> </dd></dl>
    205. 

  205. <dl class="section user"><dt></dt><dd>where N = 4096, logN2 = 12 </dd></dl>
    206. 

  206. <dl class="section user"><dt></dt><dd>N is the maximum FFT Size supported </dd></dl>
    207. 

  207. 

  208. </div>
    209. 

  209. </div>
    210. 

  210. <a class="anchor" id="ga27c056eb130a4333d1cc5dd43ec738b1"></a>
    211. 

  211. <div class="memitem">
    212. 

  212. <div class="memproto">
    213. 

  213.       <table class="memname">
    214. 

  214.         <tr>
    215. 

  215.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_1024[2048]</td>
    216. 

  216.         </tr>
    217. 

  217.       </table>
    218. 

  218. </div><div class="memdoc">
    219. 

  219. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    220. 

  220. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; N/; i++)
    221. 

  221. {
    222. 

  222.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    223. 

  223.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    224. 

  224. } </pre> </dd></dl>
    225. 

  225. <dl class="section user"><dt></dt><dd>where N = 1024, PI = 3.14159265358979 </dd></dl>
    226. 

  226. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    227. 

  227. 

  228. </div>
    229. 

  229. </div>
    230. 

  230. <a class="anchor" id="ga8a0ec95d866fe96b740e77d6e1356b59"></a>
    231. 

  231. <div class="memitem">
    232. 

  232. <div class="memproto">
    233. 

  233.       <table class="memname">
    234. 

  234.         <tr>
    235. 

  235.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_1024_q15[1536]</td>
    236. 

  236.         </tr>
    237. 

  237.       </table>
    238. 

  238. </div><div class="memdoc">
    239. 

  239. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    240. 

  240. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    241. 

  241. {
    242. 

  242.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    243. 

  243.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    244. 

  244. } </pre> </dd></dl>
    245. 

  245. <dl class="section user"><dt></dt><dd>where N = 1024, PI = 3.14159265358979 </dd></dl>
    246. 

  246. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    247. 

  247. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    248. 

  248. 

  249. </div>
    250. 

  250. </div>
    251. 

  251. <a class="anchor" id="ga514443c44b62b8b3d240afefebcda310"></a>
    252. 

  252. <div class="memitem">
    253. 

  253. <div class="memproto">
    254. 

  254.       <table class="memname">
    255. 

  255.         <tr>
    256. 

  256.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_1024_q31[1536]</td>
    257. 

  257.         </tr>
    258. 

  258.       </table>
    259. 

  259. </div><div class="memdoc">
    260. 

  260. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    261. 

  261. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    262. 

  262. {
    263. 

  263.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    264. 

  264.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    265. 

  265. } </pre> </dd></dl>
    266. 

  266. <dl class="section user"><dt></dt><dd>where N = 1024, PI = 3.14159265358979 </dd></dl>
    267. 

  267. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    268. 

  268. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    269. 

  269. 

  270. </div>
    271. 

  271. </div>
    272. 

  272. <a class="anchor" id="ga948433536dafaac1381decfccf4e2d9c"></a>
    273. 

  273. <div class="memitem">
    274. 

  274. <div class="memproto">
    275. 

  275.       <table class="memname">
    276. 

  276.         <tr>
    277. 

  277.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_128[256]</td>
    278. 

  278.         </tr>
    279. 

  279.       </table>
    280. 

  280. </div><div class="memdoc">
    281. 

  281. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    282. 

  282. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; N/; i++)
    283. 

  283. {
    284. 

  284.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    285. 

  285.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    286. 

  286. } </pre> </dd></dl>
    287. 

  287. <dl class="section user"><dt></dt><dd>where N = 128, PI = 3.14159265358979 </dd></dl>
    288. 

  288. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    289. 

  289. 

  290. </div>
    291. 

  291. </div>
    292. 

  292. <a class="anchor" id="gabfdd1c5cd2b3f96da5fe5f07c707a8e5"></a>
    293. 

  293. <div class="memitem">
    294. 

  294. <div class="memproto">
    295. 

  295.       <table class="memname">
    296. 

  296.         <tr>
    297. 

  297.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_128_q15[192]</td>
    298. 

  298.         </tr>
    299. 

  299.       </table>
    300. 

  300. </div><div class="memdoc">
    301. 

  301. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    302. 

  302. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    303. 

  303. {
    304. 

  304.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    305. 

  305.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    306. 

  306. } </pre> </dd></dl>
    307. 

  307. <dl class="section user"><dt></dt><dd>where N = 128, PI = 3.14159265358979 </dd></dl>
    308. 

  308. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    309. 

  309. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    310. 

  310. 

  311. </div>
    312. 

  312. </div>
    313. 

  313. <a class="anchor" id="gafecf9ed9873415d9f5f17f37b30c7250"></a>
    314. 

  314. <div class="memitem">
    315. 

  315. <div class="memproto">
    316. 

  316.       <table class="memname">
    317. 

  317.         <tr>
    318. 

  318.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_128_q31[192]</td>
    319. 

  319.         </tr>
    320. 

  320.       </table>
    321. 

  321. </div><div class="memdoc">
    322. 

  322. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    323. 

  323. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i &lt; 3N/4; i++)
    324. 

  324. {
    325. 

  325.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    326. 

  326.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    327. 

  327. } </pre> </dd></dl>
    328. 

  328. <dl class="section user"><dt></dt><dd>where N = 128, PI = 3.14159265358979 </dd></dl>
    329. 

  329. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    330. 

  330. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    331. 

  331. 

  332. </div>
    333. 

  333. </div>
    334. 

  334. <a class="anchor" id="gae75e243ec61706427314270f222e0c8e"></a>
    335. 

  335. <div class="memitem">
    336. 

  336. <div class="memproto">
    337. 

  337.       <table class="memname">
    338. 

  338.         <tr>
    339. 

  339.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_16[32]</td>
    340. 

  340.         </tr>
    341. 

  341.       </table>
    342. 

  342. </div><div class="memdoc">
    343. 

  343. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    344. 

  344. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i &lt; N/; i++)
    345. 

  345. {
    346. 

  346.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    347. 

  347.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    348. 

  348. } </pre> </dd></dl>
    349. 

  349. <dl class="section user"><dt></dt><dd>where N = 16, PI = 3.14159265358979 </dd></dl>
    350. 

  350. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    351. 

  351. 

  352. </div>
    353. 

  353. </div>
    354. 

  354. <a class="anchor" id="ga8e4e2e05f4a3112184c96cb3308d6c39"></a>
    355. 

  355. <div class="memitem">
    356. 

  356. <div class="memproto">
    357. 

  357.       <table class="memname">
    358. 

  358.         <tr>
    359. 

  359.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_16_q15[24]</td>
    360. 

  360.         </tr>
    361. 

  361.       </table>
    362. 

  362. </div><div class="memdoc">
    363. 

  363. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    364. 

  364. <dl class="section user"><dt></dt><dd><pre>fori = 0; i&lt; 3N/4; i++)
    365. 

  365. {
    366. 

  366.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    367. 

  367.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    368. 

  368. } </pre> </dd></dl>
    369. 

  369. <dl class="section user"><dt></dt><dd>where N = 16, PI = 3.14159265358979 </dd></dl>
    370. 

  370. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    371. 

  371. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    372. 

  372. 

  373. </div>
    374. 

  374. </div>
    375. 

  375. <a class="anchor" id="gaef4697e1ba348c4ac9358f2b9e279e93"></a>
    376. 

  376. <div class="memitem">
    377. 

  377. <div class="memproto">
    378. 

  378.       <table class="memname">
    379. 

  379.         <tr>
    380. 

  380.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_16_q31[24]</td>
    381. 

  381.         </tr>
    382. 

  382.       </table>
    383. 

  383. </div><div class="memdoc">
    384. 

  384. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    385. 

  385. <dl class="section user"><dt></dt><dd><pre> for(i = 0; i&lt; 3N/4; i++)
    386. 

  386. {
    387. 

  387.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    388. 

  388.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    389. 

  389. } </pre> </dd></dl>
    390. 

  390. <dl class="section user"><dt></dt><dd>where N = 16, PI = 3.14159265358979 </dd></dl>
    391. 

  391. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    392. 

  392. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    393. 

  393. 

  394. </div>
    395. 

  395. </div>
    396. 

  396. <a class="anchor" id="ga23e7f30421a7905b21c2015429779633"></a>
    397. 

  397. <div class="memitem">
    398. 

  398. <div class="memproto">
    399. 

  399.       <table class="memname">
    400. 

  400.         <tr>
    401. 

  401.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_2048[4096]</td>
    402. 

  402.         </tr>
    403. 

  403.       </table>
    404. 

  404. </div><div class="memdoc">
    405. 

  405. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    406. 

  406. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; N/; i++)
    407. 

  407. {
    408. 

  408.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    409. 

  409.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    410. 

  410. } </pre> </dd></dl>
    411. 

  411. <dl class="section user"><dt></dt><dd>where N = 2048, PI = 3.14159265358979 </dd></dl>
    412. 

  412. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    413. 

  413. 

  414. </div>
    415. 

  415. </div>
    416. 

  416. <a class="anchor" id="gadd16ce08ffd1048c385e0534a3b19cbb"></a>
    417. 

  417. <div class="memitem">
    418. 

  418. <div class="memproto">
    419. 

  419.       <table class="memname">
    420. 

  420.         <tr>
    421. 

  421.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_2048_q15[3072]</td>
    422. 

  422.         </tr>
    423. 

  423.       </table>
    424. 

  424. </div><div class="memdoc">
    425. 

  425. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    426. 

  426. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    427. 

  427. {
    428. 

  428.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    429. 

  429.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    430. 

  430. } </pre> </dd></dl>
    431. 

  431. <dl class="section user"><dt></dt><dd>where N = 2048, PI = 3.14159265358979 </dd></dl>
    432. 

  432. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    433. 

  433. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    434. 

  434. 

  435. </div>
    436. 

  436. </div>
    437. 

  437. <a class="anchor" id="ga9c5767de9f5a409fd0c2027e6ac67179"></a>
    438. 

  438. <div class="memitem">
    439. 

  439. <div class="memproto">
    440. 

  440.       <table class="memname">
    441. 

  441.         <tr>
    442. 

  442.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_2048_q31[3072]</td>
    443. 

  443.         </tr>
    444. 

  444.       </table>
    445. 

  445. </div><div class="memdoc">
    446. 

  446. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    447. 

  447. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    448. 

  448. {
    449. 

  449.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    450. 

  450.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    451. 

  451. } </pre> </dd></dl>
    452. 

  452. <dl class="section user"><dt></dt><dd>where N = 2048, PI = 3.14159265358979 </dd></dl>
    453. 

  453. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    454. 

  454. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    455. 

  455. 

  456. </div>
    457. 

  457. </div>
    458. 

  458. <a class="anchor" id="gafe813758a03a798e972359a092315be4"></a>
    459. 

  459. <div class="memitem">
    460. 

  460. <div class="memproto">
    461. 

  461.       <table class="memname">
    462. 

  462.         <tr>
    463. 

  463.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_256[512]</td>
    464. 

  464.         </tr>
    465. 

  465.       </table>
    466. 

  466. </div><div class="memdoc">
    467. 

  467. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    468. 

  468. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i&lt; N/; i++)
    469. 

  469. {
    470. 

  470.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    471. 

  471.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    472. 

  472. } </pre> </dd></dl>
    473. 

  473. <dl class="section user"><dt></dt><dd>where N = 256, PI = 3.14159265358979 </dd></dl>
    474. 

  474. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    475. 

  475. 

  476. </div>
    477. 

  477. </div>
    478. 

  478. <a class="anchor" id="ga6099ae5262a0a3a8d9ce1e6da02f0c2e"></a>
    479. 

  479. <div class="memitem">
    480. 

  480. <div class="memproto">
    481. 

  481.       <table class="memname">
    482. 

  482.         <tr>
    483. 

  483.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_256_q15[384]</td>
    484. 

  484.         </tr>
    485. 

  485.       </table>
    486. 

  486. </div><div class="memdoc">
    487. 

  487. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    488. 

  488. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    489. 

  489. {
    490. 

  490.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    491. 

  491.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    492. 

  492. } </pre> </dd></dl>
    493. 

  493. <dl class="section user"><dt></dt><dd>where N = 256, PI = 3.14159265358979 </dd></dl>
    494. 

  494. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    495. 

  495. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    496. 

  496. 

  497. </div>
    498. 

  498. </div>
    499. 

  499. <a class="anchor" id="gaef1ea005053b715b851cf5f908168ede"></a>
    500. 

  500. <div class="memitem">
    501. 

  501. <div class="memproto">
    502. 

  502.       <table class="memname">
    503. 

  503.         <tr>
    504. 

  504.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_256_q31[384]</td>
    505. 

  505.         </tr>
    506. 

  506.       </table>
    507. 

  507. </div><div class="memdoc">
    508. 

  508. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    509. 

  509. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    510. 

  510. {
    511. 

  511.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    512. 

  512.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    513. 

  513. } </pre> </dd></dl>
    514. 

  514. <dl class="section user"><dt></dt><dd>where N = 256, PI = 3.14159265358979 </dd></dl>
    515. 

  515. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    516. 

  516. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    517. 

  517. 

  518. </div>
    519. 

  519. </div>
    520. 

  520. <a class="anchor" id="ga78a72c85d88185de98050c930cfc76e3"></a>
    521. 

  521. <div class="memitem">
    522. 

  522. <div class="memproto">
    523. 

  523.       <table class="memname">
    524. 

  524.         <tr>
    525. 

  525.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_32[64]</td>
    526. 

  526.         </tr>
    527. 

  527.       </table>
    528. 

  528. </div><div class="memdoc">
    529. 

  529. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    530. 

  530. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; N/; i++)
    531. 

  531. {
    532. 

  532.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    533. 

  533.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    534. 

  534. } </pre> </dd></dl>
    535. 

  535. <dl class="section user"><dt></dt><dd>where N = 32, PI = 3.14159265358979 </dd></dl>
    536. 

  536. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    537. 

  537. 

  538. </div>
    539. 

  539. </div>
    540. 

  540. <a class="anchor" id="gac194a4fe04a19051ae1811f69c6e5df2"></a>
    541. 

  541. <div class="memitem">
    542. 

  542. <div class="memproto">
    543. 

  543.       <table class="memname">
    544. 

  544.         <tr>
    545. 

  545.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_32_q15[48]</td>
    546. 

  546.         </tr>
    547. 

  547.       </table>
    548. 

  548. </div><div class="memdoc">
    549. 

  549. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    550. 

  550. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    551. 

  551. {
    552. 

  552.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    553. 

  553.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    554. 

  554. } </pre> </dd></dl>
    555. 

  555. <dl class="section user"><dt></dt><dd>where N = 32, PI = 3.14159265358979 </dd></dl>
    556. 

  556. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    557. 

  557. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    558. 

  558. 

  559. </div>
    560. 

  560. </div>
    561. 

  561. <a class="anchor" id="ga8ba78d5e6ef4bdc58e8f0044e0664a0a"></a>
    562. 

  562. <div class="memitem">
    563. 

  563. <div class="memproto">
    564. 

  564.       <table class="memname">
    565. 

  565.         <tr>
    566. 

  566.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_32_q31[48]</td>
    567. 

  567.         </tr>
    568. 

  568.       </table>
    569. 

  569. </div><div class="memdoc">
    570. 

  570. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    571. 

  571. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    572. 

  572. {
    573. 

  573.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    574. 

  574.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    575. 

  575. } </pre> </dd></dl>
    576. 

  576. <dl class="section user"><dt></dt><dd>where N = 32, PI = 3.14159265358979 </dd></dl>
    577. 

  577. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    578. 

  578. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    579. 

  579. 

  580. </div>
    581. 

  581. </div>
    582. 

  582. <a class="anchor" id="gae0182d1dd3b2f21aad4e38a815a0bd40"></a>
    583. 

  583. <div class="memitem">
    584. 

  584. <div class="memproto">
    585. 

  585.       <table class="memname">
    586. 

  586.         <tr>
    587. 

  587.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_4096[8192]</td>
    588. 

  588.         </tr>
    589. 

  589.       </table>
    590. 

  590. </div><div class="memdoc">
    591. 

  591. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    592. 

  592. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; N/; i++)
    593. 

  593. {
    594. 

  594.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    595. 

  595.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    596. 

  596. } </pre> </dd></dl>
    597. 

  597. <dl class="section user"><dt></dt><dd>where N = 4096, PI = 3.14159265358979 </dd></dl>
    598. 

  598. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    599. 

  599. 

  600. </div>
    601. 

  601. </div>
    602. 

  602. <a class="anchor" id="ga9b409d6995eab17805b1d1881d4bc652"></a>
    603. 

  603. <div class="memitem">
    604. 

  604. <div class="memproto">
    605. 

  605.       <table class="memname">
    606. 

  606.         <tr>
    607. 

  607.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_4096_q15[6144]</td>
    608. 

  608.         </tr>
    609. 

  609.       </table>
    610. 

  610. </div><div class="memdoc">
    611. 

  611. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    612. 

  612. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    613. 

  613. {
    614. 

  614.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    615. 

  615.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    616. 

  616. } </pre> </dd></dl>
    617. 

  617. <dl class="section user"><dt></dt><dd>where N = 4096, PI = 3.14159265358979 </dd></dl>
    618. 

  618. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    619. 

  619. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    620. 

  620. 

  621. </div>
    622. 

  622. </div>
    623. 

  623. <a class="anchor" id="ga67c0890317deab3391e276f22c1fc400"></a>
    624. 

  624. <div class="memitem">
    625. 

  625. <div class="memproto">
    626. 

  626.       <table class="memname">
    627. 

  627.         <tr>
    628. 

  628.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_4096_q31[6144]</td>
    629. 

  629.         </tr>
    630. 

  630.       </table>
    631. 

  631. </div><div class="memdoc">
    632. 

  632. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    633. 

  633. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    634. 

  634. {
    635. 

  635.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    636. 

  636.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    637. 

  637. } </pre> </dd></dl>
    638. 

  638. <dl class="section user"><dt></dt><dd>where N = 4096, PI = 3.14159265358979 </dd></dl>
    639. 

  639. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    640. 

  640. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    641. 

  641. 

  642. </div>
    643. 

  643. </div>
    644. 

  644. <a class="anchor" id="gad8830f0c068ab2cc19f2f87d220fa148"></a>
    645. 

  645. <div class="memitem">
    646. 

  646. <div class="memproto">
    647. 

  647.       <table class="memname">
    648. 

  648.         <tr>
    649. 

  649.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_512[1024]</td>
    650. 

  650.         </tr>
    651. 

  651.       </table>
    652. 

  652. </div><div class="memdoc">
    653. 

  653. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    654. 

  654. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; N/; i++)
    655. 

  655. {
    656. 

  656.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    657. 

  657.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    658. 

  658. } </pre> </dd></dl>
    659. 

  659. <dl class="section user"><dt></dt><dd>where N = 512, PI = 3.14159265358979 </dd></dl>
    660. 

  660. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    661. 

  661. 

  662. </div>
    663. 

  663. </div>
    664. 

  664. <a class="anchor" id="ga6152621af210f847128c6f38958fa385"></a>
    665. 

  665. <div class="memitem">
    666. 

  666. <div class="memproto">
    667. 

  667.       <table class="memname">
    668. 

  668.         <tr>
    669. 

  669.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_512_q15[768]</td>
    670. 

  670.         </tr>
    671. 

  671.       </table>
    672. 

  672. </div><div class="memdoc">
    673. 

  673. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    674. 

  674. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    675. 

  675. {
    676. 

  676.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    677. 

  677.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    678. 

  678. } </pre> </dd></dl>
    679. 

  679. <dl class="section user"><dt></dt><dd>where N = 512, PI = 3.14159265358979 </dd></dl>
    680. 

  680. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    681. 

  681. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    682. 

  682. 

  683. </div>
    684. 

  684. </div>
    685. 

  685. <a class="anchor" id="ga416c61b2f08542a39111e06b0378bebe"></a>
    686. 

  686. <div class="memitem">
    687. 

  687. <div class="memproto">
    688. 

  688.       <table class="memname">
    689. 

  689.         <tr>
    690. 

  690.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_512_q31[768]</td>
    691. 

  691.         </tr>
    692. 

  692.       </table>
    693. 

  693. </div><div class="memdoc">
    694. 

  694. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    695. 

  695. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    696. 

  696. {
    697. 

  697.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    698. 

  698.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    699. 

  699. } </pre> </dd></dl>
    700. 

  700. <dl class="section user"><dt></dt><dd>where N = 512, PI = 3.14159265358979 </dd></dl>
    701. 

  701. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    702. 

  702. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    703. 

  703. 

  704. </div>
    705. 

  705. </div>
    706. 

  706. <a class="anchor" id="ga4f3c6d98c7e66393b4ef3ac63746e43d"></a>
    707. 

  707. <div class="memitem">
    708. 

  708. <div class="memproto">
    709. 

  709.       <table class="memname">
    710. 

  710.         <tr>
    711. 

  711.           <td class="memname">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> twiddleCoef_64[128]</td>
    712. 

  712.         </tr>
    713. 

  713.       </table>
    714. 

  714. </div><div class="memdoc">
    715. 

  715. <dl class="section user"><dt></dt><dd>Example code for Floating-point Twiddle factors Generation: </dd></dl>
    716. 

  716. <dl class="section user"><dt></dt><dd><pre>for(i = 0; i &lt; N/; i++)
    717. 

  717. {
    718. 

  718.       twiddleCoef[2*i]   = cos(i * 2*PI/(float)N);
    719. 

  719.       twiddleCoef[2*i+1] = sin(i * 2*PI/(float)N);
    720. 

  720. } </pre> </dd></dl>
    721. 

  721. <dl class="section user"><dt></dt><dd>where N = 64, PI = 3.14159265358979 </dd></dl>
    722. 

  722. <dl class="section user"><dt></dt><dd>Cos and Sin values are in interleaved fashion </dd></dl>
    723. 

  723. 

  724. </div>
    725. 

  725. </div>
    726. 

  726. <a class="anchor" id="gaa0cc411e0b3c82078e85cfdf1b84290f"></a>
    727. 

  727. <div class="memitem">
    728. 

  728. <div class="memproto">
    729. 

  729.       <table class="memname">
    730. 

  730.         <tr>
    731. 

  731.           <td class="memname">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> twiddleCoef_64_q15[96]</td>
    732. 

  732.         </tr>
    733. 

  733.       </table>
    734. 

  734. </div><div class="memdoc">
    735. 

  735. <dl class="section user"><dt></dt><dd>Example code for q15 Twiddle factors Generation:: </dd></dl>
    736. 

  736. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    737. 

  737. {
    738. 

  738.    twiddleCoefq15[2*i]   = cos(i * 2*PI/(float)N);
    739. 

  739.    twiddleCoefq15[2*i+1] = sin(i * 2*PI/(float)N);
    740. 

  740. } </pre> </dd></dl>
    741. 

  741. <dl class="section user"><dt></dt><dd>where N = 64, PI = 3.14159265358979 </dd></dl>
    742. 

  742. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    743. 

  743. <dl class="section user"><dt></dt><dd>Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15)) </dd></dl>
    744. 

  744. 

  745. </div>
    746. 

  746. </div>
    747. 

  747. <a class="anchor" id="ga6e0a7e941a25a0d74b2e6590307de47e"></a>
    748. 

  748. <div class="memitem">
    749. 

  749. <div class="memproto">
    750. 

  750.       <table class="memname">
    751. 

  751.         <tr>
    752. 

  752.           <td class="memname">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> twiddleCoef_64_q31[96]</td>
    753. 

  753.         </tr>
    754. 

  754.       </table>
    755. 

  755. </div><div class="memdoc">
    756. 

  756. <dl class="section user"><dt></dt><dd>Example code for Q31 Twiddle factors Generation:: </dd></dl>
    757. 

  757. <dl class="section user"><dt></dt><dd><pre>for (i = 0; i&lt; 3N/4; i++)
    758. 

  758. {
    759. 

  759.    twiddleCoefQ31[2*i]   = cos(i * 2*PI/(float)N);
    760. 

  760.    twiddleCoefQ31[2*i+1] = sin(i * 2*PI/(float)N);
    761. 

  761. } </pre> </dd></dl>
    762. 

  762. <dl class="section user"><dt></dt><dd>where N = 64, PI = 3.14159265358979 </dd></dl>
    763. 

  763. <dl class="section user"><dt></dt><dd>Cos and Sin values are interleaved fashion </dd></dl>
    764. 

  764. <dl class="section user"><dt></dt><dd>Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31)) </dd></dl>
    765. 

  765. 

  766. </div>
    767. 

  767. </div>
    768. 

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    769. 

  769. </div><!-- doc-content -->
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