noise_shaping_data.c 7.9 KB

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  1. /* Effect: dither/noise-shape Copyright (c) 2008-9 robs@users.sourceforge.net
  2. *
  3. * This library is free software; you can redistribute it and/or modify it
  4. * under the terms of the GNU Lesser General Public License as published by
  5. * the Free Software Foundation; either version 2.1 of the License, or (at
  6. * your option) any later version.
  7. *
  8. * This library is distributed in the hope that it will be useful, but
  9. * WITHOUT ANY WARRANTY; without even the implied warranty of
  10. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
  11. * General Public License for more details.
  12. *
  13. * You should have received a copy of the GNU Lesser General Public License
  14. * along with this library; if not, write to the Free Software Foundation,
  15. * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  16. */
  17. typedef struct {
  18. int rate;
  19. enum {fir, iir} type;
  20. size_t len;
  21. int gain_cB; /* Chosen so clips are few if any, but not guaranteed none. */
  22. double const * coefs;
  23. enum SwrDitherType name;
  24. } filter_t;
  25. static double const lip44[] = {2.033, -2.165, 1.959, -1.590, .6149};
  26. static double const fwe44[] = {
  27. 2.412, -3.370, 3.937, -4.174, 3.353, -2.205, 1.281, -.569, .0847};
  28. static double const mew44[] = {
  29. 1.662, -1.263, .4827, -.2913, .1268, -.1124, .03252, -.01265, -.03524};
  30. static double const iew44[] = {
  31. 2.847, -4.685, 6.214, -7.184, 6.639, -5.032, 3.263, -1.632, .4191};
  32. static double const shi48[] = {
  33. 2.8720729351043701172, -5.0413231849670410156, 6.2442994117736816406,
  34. -5.8483986854553222656, 3.7067542076110839844, -1.0495119094848632812,
  35. -1.1830236911773681641, 2.1126792430877685547, -1.9094531536102294922,
  36. 0.99913084506988525391, -0.17090806365013122559, -0.32615602016448974609,
  37. 0.39127644896507263184, -0.26876461505889892578, 0.097676105797290802002,
  38. -0.023473845794796943665,
  39. };
  40. static double const shi44[] = {
  41. 2.6773197650909423828, -4.8308925628662109375, 6.570110321044921875,
  42. -7.4572014808654785156, 6.7263274192810058594, -4.8481650352478027344,
  43. 2.0412089824676513672, 0.7006359100341796875, -2.9537565708160400391,
  44. 4.0800385475158691406, -4.1845216751098632812, 3.3311812877655029297,
  45. -2.1179926395416259766, 0.879302978515625, -0.031759146600961685181,
  46. -0.42382788658142089844, 0.47882103919982910156, -0.35490813851356506348,
  47. 0.17496839165687561035, -0.060908168554306030273,
  48. };
  49. static double const shi38[] = {
  50. 1.6335992813110351562, -2.2615492343902587891, 2.4077029228210449219,
  51. -2.6341717243194580078, 2.1440362930297851562, -1.8153258562088012695,
  52. 1.0816224813461303711, -0.70302653312683105469, 0.15991993248462677002,
  53. 0.041549518704414367676, -0.29416576027870178223, 0.2518316805362701416,
  54. -0.27766478061676025391, 0.15785403549671173096, -0.10165894031524658203,
  55. 0.016833892092108726501,
  56. };
  57. static double const shi32[] =
  58. { /* dmaker 32000: bestmax=4.99659 (inverted) */
  59. 0.82118552923202515,
  60. -1.0063692331314087,
  61. 0.62341964244842529,
  62. -1.0447187423706055,
  63. 0.64532512426376343,
  64. -0.87615132331848145,
  65. 0.52219754457473755,
  66. -0.67434263229370117,
  67. 0.44954317808151245,
  68. -0.52557498216629028,
  69. 0.34567299485206604,
  70. -0.39618203043937683,
  71. 0.26791760325431824,
  72. -0.28936097025871277,
  73. 0.1883765310049057,
  74. -0.19097308814525604,
  75. 0.10431359708309174,
  76. -0.10633844882249832,
  77. 0.046832218766212463,
  78. -0.039653312414884567,
  79. };
  80. static double const shi22[] =
  81. { /* dmaker 22050: bestmax=5.77762 (inverted) */
  82. 0.056581053882837296,
  83. -0.56956905126571655,
  84. -0.40727734565734863,
  85. -0.33870288729667664,
  86. -0.29810553789138794,
  87. -0.19039161503314972,
  88. -0.16510021686553955,
  89. -0.13468159735202789,
  90. -0.096633769571781158,
  91. -0.081049129366874695,
  92. -0.064953058958053589,
  93. -0.054459091275930405,
  94. -0.043378707021474838,
  95. -0.03660014271736145,
  96. -0.026256965473294258,
  97. -0.018786206841468811,
  98. -0.013387725688517094,
  99. -0.0090983230620622635,
  100. -0.0026585909072309732,
  101. -0.00042083300650119781,
  102. };
  103. static double const shi16[] =
  104. { /* dmaker 16000: bestmax=5.97128 (inverted) */
  105. -0.37251132726669312,
  106. -0.81423574686050415,
  107. -0.55010956525802612,
  108. -0.47405767440795898,
  109. -0.32624706625938416,
  110. -0.3161766529083252,
  111. -0.2286367267370224,
  112. -0.22916607558727264,
  113. -0.19565616548061371,
  114. -0.18160104751586914,
  115. -0.15423151850700378,
  116. -0.14104481041431427,
  117. -0.11844276636838913,
  118. -0.097583092749118805,
  119. -0.076493598520755768,
  120. -0.068106919527053833,
  121. -0.041881654411554337,
  122. -0.036922425031661987,
  123. -0.019364040344953537,
  124. -0.014994367957115173,
  125. };
  126. static double const shi11[] =
  127. { /* dmaker 11025: bestmax=5.9406 (inverted) */
  128. -0.9264228343963623,
  129. -0.98695987462997437,
  130. -0.631156325340271,
  131. -0.51966935396194458,
  132. -0.39738872647285461,
  133. -0.35679301619529724,
  134. -0.29720726609230042,
  135. -0.26310476660728455,
  136. -0.21719355881214142,
  137. -0.18561814725399017,
  138. -0.15404847264289856,
  139. -0.12687471508979797,
  140. -0.10339745879173279,
  141. -0.083688631653785706,
  142. -0.05875682458281517,
  143. -0.046893671154975891,
  144. -0.027950936928391457,
  145. -0.020740609616041183,
  146. -0.009366452693939209,
  147. -0.0060260160826146603,
  148. };
  149. static double const shi08[] =
  150. { /* dmaker 8000: bestmax=5.56234 (inverted) */
  151. -1.202863335609436,
  152. -0.94103097915649414,
  153. -0.67878556251525879,
  154. -0.57650017738342285,
  155. -0.50004476308822632,
  156. -0.44349345564842224,
  157. -0.37833768129348755,
  158. -0.34028723835945129,
  159. -0.29413089156150818,
  160. -0.24994957447052002,
  161. -0.21715600788593292,
  162. -0.18792112171649933,
  163. -0.15268312394618988,
  164. -0.12135542929172516,
  165. -0.099610626697540283,
  166. -0.075273610651493073,
  167. -0.048787496984004974,
  168. -0.042586319148540497,
  169. -0.028991291299462318,
  170. -0.011869125068187714,
  171. };
  172. static double const shl48[] = {
  173. 2.3925774097442626953, -3.4350297451019287109, 3.1853709220886230469,
  174. -1.8117271661758422852, -0.20124770700931549072, 1.4759907722473144531,
  175. -1.7210904359817504883, 0.97746700048446655273, -0.13790138065814971924,
  176. -0.38185903429985046387, 0.27421241998672485352, 0.066584214568138122559,
  177. -0.35223302245140075684, 0.37672343850135803223, -0.23964276909828186035,
  178. 0.068674825131893157959,
  179. };
  180. static double const shl44[] = {
  181. 2.0833916664123535156, -3.0418450832366943359, 3.2047898769378662109,
  182. -2.7571926116943359375, 1.4978630542755126953, -0.3427594602108001709,
  183. -0.71733748912811279297, 1.0737057924270629883, -1.0225815773010253906,
  184. 0.56649994850158691406, -0.20968692004680633545, -0.065378531813621520996,
  185. 0.10322438180446624756, -0.067442022264003753662, -0.00495197344571352005,
  186. 0,
  187. };
  188. static double const shh44[] = {
  189. 3.0259189605712890625, -6.0268716812133789062, 9.195003509521484375,
  190. -11.824929237365722656, 12.767142295837402344, -11.917946815490722656,
  191. 9.1739168167114257812, -5.3712320327758789062, 1.1393624544143676758,
  192. 2.4484779834747314453, -4.9719839096069335938, 6.0392003059387207031,
  193. -5.9359521865844726562, 4.903278350830078125, -3.5527443885803222656,
  194. 2.1909697055816650391, -1.1672389507293701172, 0.4903914332389831543,
  195. -0.16519790887832641602, 0.023217858746647834778,
  196. };
  197. static const filter_t filters[] = {
  198. {44100, fir, 5, 210, lip44, SWR_DITHER_NS_LIPSHITZ},
  199. {46000, fir, 9, 276, fwe44, SWR_DITHER_NS_F_WEIGHTED},
  200. {46000, fir, 9, 160, mew44, SWR_DITHER_NS_MODIFIED_E_WEIGHTED},
  201. {46000, fir, 9, 321, iew44, SWR_DITHER_NS_IMPROVED_E_WEIGHTED},
  202. // {48000, iir, 4, 220, ges48, SWR_DITHER_NS_GESEMANN},
  203. // {44100, iir, 4, 230, ges44, SWR_DITHER_NS_GESEMANN},
  204. {48000, fir, 16, 301, shi48, SWR_DITHER_NS_SHIBATA},
  205. {44100, fir, 20, 333, shi44, SWR_DITHER_NS_SHIBATA},
  206. {37800, fir, 16, 240, shi38, SWR_DITHER_NS_SHIBATA},
  207. {32000, fir, 20, 240/*TBD*/, shi32, SWR_DITHER_NS_SHIBATA},
  208. {22050, fir, 20, 240/*TBD*/, shi22, SWR_DITHER_NS_SHIBATA},
  209. {16000, fir, 20, 240/*TBD*/, shi16, SWR_DITHER_NS_SHIBATA},
  210. {11025, fir, 20, 240/*TBD*/, shi11, SWR_DITHER_NS_SHIBATA},
  211. { 8000, fir, 20, 240/*TBD*/, shi08, SWR_DITHER_NS_SHIBATA},
  212. {48000, fir, 16, 250, shl48, SWR_DITHER_NS_LOW_SHIBATA},
  213. {44100, fir, 15, 250, shl44, SWR_DITHER_NS_LOW_SHIBATA},
  214. {44100, fir, 20, 383, shh44, SWR_DITHER_NS_HIGH_SHIBATA},
  215. { 0, fir, 0, 0, NULL, SWR_DITHER_NONE},
  216. };