1 | /* |
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2 | Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org> |
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3 | |
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4 | This file is part of aubio. |
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5 | |
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6 | aubio is free software: you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation, either version 3 of the License, or |
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9 | (at your option) any later version. |
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10 | |
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11 | aubio is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with aubio. If not, see <http://www.gnu.org/licenses/>. |
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18 | |
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19 | */ |
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20 | |
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21 | #include "aubio_priv.h" |
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22 | #include "types.h" |
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23 | #include "fvec.h" |
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24 | #include "lvec.h" |
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25 | #include "temporal/filter.h" |
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26 | #include "temporal/a_weighting.h" |
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27 | |
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28 | uint_t |
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29 | aubio_filter_set_a_weighting (aubio_filter_t * f, uint_t samplerate) |
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30 | { |
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31 | uint_t order; lsmp_t *a, *b; lvec_t *as, *bs; |
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32 | |
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33 | if ((sint_t)samplerate <= 0) { |
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34 | AUBIO_ERROR("aubio_filter: failed setting A-weighting with samplerate %d\n", samplerate); |
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35 | return AUBIO_FAIL; |
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36 | } |
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37 | if (f == NULL) { |
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38 | AUBIO_ERROR("aubio_filter: failed setting A-weighting with filter NULL\n"); |
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39 | return AUBIO_FAIL; |
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40 | } |
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41 | |
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42 | order = aubio_filter_get_order (f); |
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43 | if (order != 7) { |
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44 | AUBIO_ERROR ("aubio_filter: order of A-weighting filter must be 7, not %d\n", order); |
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45 | return 1; |
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46 | } |
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47 | |
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48 | aubio_filter_set_samplerate (f, samplerate); |
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49 | bs = aubio_filter_get_feedforward (f); |
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50 | as = aubio_filter_get_feedback (f); |
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51 | b = bs->data, a = as->data; |
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52 | |
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53 | /* select coefficients according to sampling frequency */ |
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54 | switch (samplerate) { |
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55 | |
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56 | case 8000: |
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57 | b[0] = 6.306209468238731519207362907764036208391189575195312500e-01; |
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58 | b[1] = -1.261241893647746525886077506584115326404571533203125000e+00; |
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59 | b[2] = -6.306209468238730408984338282607495784759521484375000000e-01; |
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60 | b[3] = 2.522483787295493051772155013168230652809143066406250000e+00; |
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61 | b[4] = -6.306209468238730408984338282607495784759521484375000000e-01; |
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62 | b[5] = -1.261241893647746525886077506584115326404571533203125000e+00; |
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63 | b[6] = 6.306209468238731519207362907764036208391189575195312500e-01; |
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64 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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65 | a[1] = -2.128467193009123015201566886389628052711486816406250000e+00; |
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66 | a[2] = 2.948668980101234460278192273108288645744323730468750000e-01; |
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67 | a[3] = 1.824183830735050637628091863007284700870513916015625000e+00; |
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68 | a[4] = -8.056628943119792385374466903158463537693023681640625000e-01; |
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69 | a[5] = -3.947497982842933517133587884018197655677795410156250000e-01; |
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70 | a[6] = 2.098548546080332977137317129745497368276119232177734375e-01; |
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71 | break; |
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72 | |
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73 | case 11025: |
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74 | b[0] = 6.014684165832374640459079273568931967020034790039062500e-01; |
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75 | b[1] = -1.202936833166475150136420779745094478130340576171875000e+00; |
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76 | b[2] = -6.014684165832373530236054648412391543388366699218750000e-01; |
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77 | b[3] = 2.405873666332950300272841559490188956260681152343750000e+00; |
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78 | b[4] = -6.014684165832373530236054648412391543388366699218750000e-01; |
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79 | b[5] = -1.202936833166475150136420779745094478130340576171875000e+00; |
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80 | b[6] = 6.014684165832374640459079273568931967020034790039062500e-01; |
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81 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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82 | a[1] = -2.463578747722854345170162559952586889266967773437500000e+00; |
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83 | a[2] = 1.096799662705210121060872552334330976009368896484375000e+00; |
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84 | a[3] = 1.381222210556041218865175324026495218276977539062500000e+00; |
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85 | a[4] = -1.013875696476876031582037285261321812868118286132812500e+00; |
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86 | a[5] = -1.839132734476921215982514468123554252088069915771484375e-01; |
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87 | a[6] = 1.833526393172056623281918064094497822225093841552734375e-01; |
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88 | break; |
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89 | |
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90 | case 16000: |
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91 | b[0] = 5.314898298235570806014038680586963891983032226562500000e-01; |
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92 | b[1] = -1.062979659647114161202807736117392778396606445312500000e+00; |
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93 | b[2] = -5.314898298235570806014038680586963891983032226562500000e-01; |
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94 | b[3] = 2.125959319294228322405615472234785556793212890625000000e+00; |
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95 | b[4] = -5.314898298235570806014038680586963891983032226562500000e-01; |
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96 | b[5] = -1.062979659647114161202807736117392778396606445312500000e+00; |
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97 | b[6] = 5.314898298235570806014038680586963891983032226562500000e-01; |
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98 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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99 | a[1] = -2.867832572992162987191022693878039717674255371093750000e+00; |
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100 | a[2] = 2.221144410202312347024644623161293566226959228515625000e+00; |
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101 | a[3] = 4.552683347886614662058946123579517006874084472656250000e-01; |
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102 | a[4] = -9.833868636162828025248927588108927011489868164062500000e-01; |
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103 | a[5] = 5.592994142413361402521587706360151059925556182861328125e-02; |
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104 | a[6] = 1.188781038285612462468421313133148942142724990844726562e-01; |
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105 | break; |
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106 | |
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107 | case 22050: |
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108 | b[0] = 4.492998504299193784916610638902056962251663208007812500e-01; |
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109 | b[1] = -8.985997008598388680056245902960654348134994506835937500e-01; |
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110 | b[2] = -4.492998504299192674693586013745516538619995117187500000e-01; |
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111 | b[3] = 1.797199401719677958055854105623438954353332519531250000e+00; |
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112 | b[4] = -4.492998504299192674693586013745516538619995117187500000e-01; |
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113 | b[5] = -8.985997008598388680056245902960654348134994506835937500e-01; |
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114 | b[6] = 4.492998504299193784916610638902056962251663208007812500e-01; |
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115 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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116 | a[1] = -3.229078805225074955131958631682209670543670654296875000e+00; |
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117 | a[2] = 3.354494881236033787530459449044428765773773193359375000e+00; |
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118 | a[3] = -7.317843680657351024265722116979304701089859008789062500e-01; |
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119 | a[4] = -6.271627581807257545420952737913466989994049072265625000e-01; |
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120 | a[5] = 1.772142005020879151899748649157118052244186401367187500e-01; |
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121 | a[6] = 5.631716697383508385410522123493137769401073455810546875e-02; |
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122 | break; |
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123 | |
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124 | case 24000: |
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125 | b[0] = 4.256263892891054001488271296693710610270500183105468750e-01; |
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126 | b[1] = -8.512527785782106892753517968230880796909332275390625000e-01; |
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127 | b[2] = -4.256263892891054556599783609271980822086334228515625000e-01; |
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128 | b[3] = 1.702505557156421378550703593646176159381866455078125000e+00; |
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129 | b[4] = -4.256263892891054556599783609271980822086334228515625000e-01; |
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130 | b[5] = -8.512527785782106892753517968230880796909332275390625000e-01; |
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131 | b[6] = 4.256263892891054001488271296693710610270500183105468750e-01; |
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132 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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133 | a[1] = -3.325996004241962733516402295208536088466644287109375000e+00; |
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134 | a[2] = 3.677161079286316969216841243905946612358093261718750000e+00; |
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135 | a[3] = -1.106476076828482035807610373012721538543701171875000000e+00; |
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136 | a[4] = -4.726706734908718843257702246773988008499145507812500000e-01; |
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137 | a[5] = 1.861941760230954034938122276798821985721588134765625000e-01; |
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138 | a[6] = 4.178771337829546850262119050967157818377017974853515625e-02; |
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139 | break; |
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140 | |
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141 | case 32000: |
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142 | b[0] = 3.434583386824304196416335344110848382115364074707031250e-01; |
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143 | b[1] = -6.869166773648609503055695313378237187862396240234375000e-01; |
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144 | b[2] = -3.434583386824303641304823031532578170299530029296875000e-01; |
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145 | b[3] = 1.373833354729721900611139062675647437572479248046875000e+00; |
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146 | b[4] = -3.434583386824303641304823031532578170299530029296875000e-01; |
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147 | b[5] = -6.869166773648609503055695313378237187862396240234375000e-01; |
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148 | b[6] = 3.434583386824304196416335344110848382115364074707031250e-01; |
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149 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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150 | a[1] = -3.656446043233668063976438133977353572845458984375000000e+00; |
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151 | a[2] = 4.831468450652579349480220116674900054931640625000000000e+00; |
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152 | a[3] = -2.557597496581567764195597192156128585338592529296875000e+00; |
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153 | a[4] = 2.533680394205302666144064005493419244885444641113281250e-01; |
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154 | a[5] = 1.224430322452567110325105659285327419638633728027343750e-01; |
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155 | a[6] = 6.764072168342137418572956875095769646577537059783935547e-03; |
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156 | break; |
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157 | |
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158 | case 44100: |
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159 | b[0] = 2.557411252042575133813784304948057979345321655273437500e-01; |
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160 | b[1] = -5.114822504085150267627568609896115958690643310546875000e-01; |
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161 | b[2] = -2.557411252042575133813784304948057979345321655273437500e-01; |
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162 | b[3] = 1.022964500817030053525513721979223191738128662109375000e+00; |
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163 | b[4] = -2.557411252042575133813784304948057979345321655273437500e-01; |
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164 | b[5] = -5.114822504085150267627568609896115958690643310546875000e-01; |
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165 | b[6] = 2.557411252042575133813784304948057979345321655273437500e-01; |
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166 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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167 | a[1] = -4.019576181115832369528106937650591135025024414062500000e+00; |
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168 | a[2] = 6.189406442920693862674852425698190927505493164062500000e+00; |
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169 | a[3] = -4.453198903544116404873420833609998226165771484375000000e+00; |
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170 | a[4] = 1.420842949621876627475103305187076330184936523437500000e+00; |
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171 | a[5] = -1.418254738303044160119270600262098014354705810546875000e-01; |
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172 | a[6] = 4.351177233495117681327801761881346465088427066802978516e-03; |
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173 | break; |
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174 | |
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175 | case 48000: |
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176 | b[0] = 2.343017922995132285013397677175817079842090606689453125e-01; |
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177 | b[1] = -4.686035845990265125138307666929904371500015258789062500e-01; |
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178 | b[2] = -2.343017922995132007457641520886681973934173583984375000e-01; |
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179 | b[3] = 9.372071691980530250276615333859808743000030517578125000e-01; |
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180 | b[4] = -2.343017922995132007457641520886681973934173583984375000e-01; |
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181 | b[5] = -4.686035845990265125138307666929904371500015258789062500e-01; |
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182 | b[6] = 2.343017922995132285013397677175817079842090606689453125e-01; |
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183 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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184 | a[1] = -4.113043408775872045168853219365701079368591308593750000e+00; |
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185 | a[2] = 6.553121752655050258340452273841947317123413085937500000e+00; |
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186 | a[3] = -4.990849294163385074796224216697737574577331542968750000e+00; |
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187 | a[4] = 1.785737302937575599059982778271660208702087402343750000e+00; |
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188 | a[5] = -2.461905953194876706113802811159985139966011047363281250e-01; |
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189 | a[6] = 1.122425003323123879339640041052916785702109336853027344e-02; |
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190 | break; |
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191 | |
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192 | case 88200: |
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193 | b[0] = 1.118876366882113199130444058937428053468465805053710938e-01; |
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194 | b[1] = -2.237752733764226120705131961585721001029014587402343750e-01; |
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195 | b[2] = -1.118876366882113337908322137081995606422424316406250000e-01; |
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196 | b[3] = 4.475505467528452241410263923171442002058029174804687500e-01; |
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197 | b[4] = -1.118876366882113337908322137081995606422424316406250000e-01; |
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198 | b[5] = -2.237752733764226120705131961585721001029014587402343750e-01; |
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199 | b[6] = 1.118876366882113199130444058937428053468465805053710938e-01; |
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200 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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201 | a[1] = -4.726938565651158441482948546763509511947631835937500000e+00; |
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202 | a[2] = 9.076897983832765248735086061060428619384765625000000000e+00; |
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203 | a[3] = -9.014855113464800950850985827855765819549560546875000000e+00; |
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204 | a[4] = 4.852772261031594425162438710685819387435913085937500000e+00; |
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205 | a[5] = -1.333877820398965186043938047077972441911697387695312500e+00; |
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206 | a[6] = 1.460012549591642450064199465487035922706127166748046875e-01; |
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207 | break; |
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208 | |
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209 | case 96000: |
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210 | b[0] = 9.951898975972744976203898659150581806898117065429687500e-02; |
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211 | b[1] = -1.990379795194548995240779731830116361379623413085937500e-01; |
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212 | b[2] = -9.951898975972744976203898659150581806898117065429687500e-02; |
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213 | b[3] = 3.980759590389097990481559463660232722759246826171875000e-01; |
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214 | b[4] = -9.951898975972744976203898659150581806898117065429687500e-02; |
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215 | b[5] = -1.990379795194548995240779731830116361379623413085937500e-01; |
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216 | b[6] = 9.951898975972744976203898659150581806898117065429687500e-02; |
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217 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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218 | a[1] = -4.802203044225376693532325589330866932868957519531250000e+00; |
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219 | a[2] = 9.401807218627226347962277941405773162841796875000000000e+00; |
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220 | a[3] = -9.566143943569164420637207513209432363510131835937500000e+00; |
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221 | a[4] = 5.309775930392619081032989925006404519081115722656250000e+00; |
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222 | a[5] = -1.517333360452622237346531619550660252571105957031250000e+00; |
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223 | a[6] = 1.740971994228911745583587844521389342844486236572265625e-01; |
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224 | break; |
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225 | |
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226 | case 192000: |
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227 | b[0] = 3.433213424548713782469278044118254911154508590698242188e-02; |
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228 | b[1] = -6.866426849097426177159775306790834292769432067871093750e-02; |
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229 | b[2] = -3.433213424548714476358668434841092675924301147460937500e-02; |
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230 | b[3] = 1.373285369819485235431955061358166858553886413574218750e-01; |
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231 | b[4] = -3.433213424548714476358668434841092675924301147460937500e-02; |
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232 | b[5] = -6.866426849097426177159775306790834292769432067871093750e-02; |
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233 | b[6] = 3.433213424548713782469278044118254911154508590698242188e-02; |
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234 | a[0] = 1.000000000000000000000000000000000000000000000000000000e+00; |
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235 | a[1] = -5.305923689674640009172890131594613194465637207031250000e+00; |
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236 | a[2] = 1.165952437466175695135461864992976188659667968750000000e+01; |
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237 | a[3] = -1.357560092700591525272102444432675838470458984375000000e+01; |
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238 | a[4] = 8.828906932824192921316353022120893001556396484375000000e+00; |
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239 | a[5] = -3.039490120988216581565666274400427937507629394531250000e+00; |
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240 | a[6] = 4.325834301870381537469256727490574121475219726562500000e-01; |
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241 | break; |
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242 | |
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243 | default: |
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244 | AUBIO_ERROR ("sampling rate of A-weighting filter is %d, should be one of\ |
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245 | 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 192000.\n", samplerate); |
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246 | return 1; |
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247 | |
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248 | } |
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249 | |
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250 | return 0; |
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251 | } |
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252 | |
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253 | aubio_filter_t * |
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254 | new_aubio_filter_a_weighting (uint_t samplerate) |
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255 | { |
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256 | aubio_filter_t *f = new_aubio_filter (7); |
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257 | if (aubio_filter_set_a_weighting(f,samplerate) != AUBIO_OK) { |
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258 | del_aubio_filter(f); |
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259 | return NULL; |
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260 | } |
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261 | return f; |
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262 | } |
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