source: src/temporal/c_weighting.c @ be6e8e6

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5sampler
Last change on this file since be6e8e6 was c21acb9, checked in by Paul Brossier <piem@piem.org>, 11 years ago

src/: improve build with -Wdeclaration-after-statement
  • Property mode set to 100644
File size: 10.2 KB
Line 
1/*
2  Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#include "aubio_priv.h"
22#include "types.h"
23#include "fvec.h"
24#include "lvec.h"
25#include "temporal/filter.h"
26#include "temporal/c_weighting.h"
27
28uint_t
29aubio_filter_set_c_weighting (aubio_filter_t * f, uint_t samplerate)
30{
31  uint_t order; lsmp_t *a, *b; lvec_t *as, *bs;
32  aubio_filter_set_samplerate (f, samplerate);
33  bs = aubio_filter_get_feedforward (f);
34  as = aubio_filter_get_feedback (f);
35  b = bs->data, a = as->data;
36  order = aubio_filter_get_order (f);
37
38  if ( order != 5 ) {
39    AUBIO_ERROR ("order of C-weighting filter must be 5, not %d\n", order);
40    return 1;
41  }
42
43  /* select coefficients according to sampling frequency */
44  switch (samplerate) {
45
46    case 8000:
47      b[0] =  6.782173932405135552414776611840352416038513183593750000e-01;
48      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
49      b[2] = -1.356434786481027110482955322368070483207702636718750000e+00;
50      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
51      b[4] =  6.782173932405135552414776611840352416038513183593750000e-01;
52      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
53      a[1] = -6.589092811505605773447769024642184376716613769531250000e-01;
54      a[2] = -1.179445664897062595599663836765103042125701904296875000e+00;
55      a[3] =  4.243329729632123736848825501510873436927795410156250000e-01;
56      a[4] =  4.147270002091348328754349950031610205769538879394531250e-01;
57      break;
58
59    case 11025:
60      b[0] =  6.002357155402652244546857218665536493062973022460937500e-01;
61      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
62      b[2] = -1.200471431080530448909371443733107298612594604492187500e+00;
63      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
64      b[4] =  6.002357155402652244546857218665536493062973022460937500e-01;
65      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
66      a[1] = -8.705602141280316397242700077185872942209243774414062500e-01;
67      a[2] = -9.037199507150940336330791069485712796449661254882812500e-01;
68      a[3] =  4.758433040929530011275971901341108605265617370605468750e-01;
69      a[4] =  2.987653956523212417373258631414500996470451354980468750e-01;
70      break;
71
72    case 16000:
73      b[0] =  4.971057193673903418229542694461997598409652709960937500e-01;
74      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
75      b[2] = -9.942114387347806836459085388923995196819305419921875000e-01;
76      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
77      b[4] =  4.971057193673903418229542694461997598409652709960937500e-01;
78      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
79      a[1] = -1.162322939286873690889478893950581550598144531250000000e+00;
80      a[2] = -4.771961355734982701548574368644040077924728393554687500e-01;
81      a[3] =  4.736145114694704227886745684372726827859878540039062500e-01;
82      a[4] =  1.660337524309875301131711466950946487486362457275390625e-01;
83      break;
84
85    case 22050:
86      b[0] =  4.033381299002754549754001800465630367398262023925781250e-01;
87      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
88      b[2] = -8.066762598005509099508003600931260734796524047851562500e-01;
89      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
90      b[4] =  4.033381299002754549754001800465630367398262023925781250e-01;
91      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
92      a[1] = -1.449545371157945350404361306573264300823211669921875000e+00;
93      a[2] = -1.030104190885922088583015465701464563608169555664062500e-02;
94      a[3] =  3.881857047554073680828423675848171114921569824218750000e-01;
95      a[4] =  7.171589940116777917022972133054281584918498992919921875e-02;
96      break;
97
98    case 24000:
99      b[0] =  3.786678621924967069745093795063439756631851196289062500e-01;
100      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
101      b[2] = -7.573357243849934139490187590126879513263702392578125000e-01;
102      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
103      b[4] =  3.786678621924967069745093795063439756631851196289062500e-01;
104      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
105      a[1] = -1.529945307555420797029910318087786436080932617187500000e+00;
106      a[2] =  1.283553182116208835061854642844991758465766906738281250e-01;
107      a[3] =  3.494608072385725350272878131363540887832641601562500000e-01;
108      a[4] =  5.217291949300089520802359288609295617789030075073242188e-02;
109      break;
110
111    case 32000:
112      b[0] =  2.977986488230693340462096330156782642006874084472656250e-01;
113      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
114      b[2] = -5.955972976461386680924192660313565284013748168945312500e-01;
115      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
116      b[4] =  2.977986488230693340462096330156782642006874084472656250e-01;
117      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
118      a[1] = -1.812455387128179218336754274787381291389465332031250000e+00;
119      a[2] =  6.425013281155662614452239722595550119876861572265625000e-01;
120      a[3] =  1.619857574578579817448087396769551560282707214355468750e-01;
121      a[4] =  7.987649713547682189807019881300220731645822525024414062e-03;
122      break;
123
124    case 44100:
125      b[0] =  2.170085619492190254220531642204150557518005371093750000e-01;
126      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
127      b[2] = -4.340171238984380508441063284408301115036010742187500000e-01;
128      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
129      b[4] =  2.170085619492190254220531642204150557518005371093750000e-01;
130      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
131      a[1] = -2.134674963687040794013682898366823792457580566406250000e+00;
132      a[2] =  1.279333533236062692139967111870646476745605468750000000e+00;
133      a[3] = -1.495598460893957093453821016737492755055427551269531250e-01;
134      a[4] =  4.908700174624683852664386307651511742733418941497802734e-03;
135      break;
136
137    case 48000:
138      b[0] =  1.978871200263932761398422144338837824761867523193359375e-01;
139      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
140      b[2] = -3.957742400527865522796844288677675649523735046386718750e-01;
141      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
142      b[4] =  1.978871200263932761398422144338837824761867523193359375e-01;
143      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
144      a[1] = -2.219172914052801814932536217384040355682373046875000000e+00;
145      a[2] =  1.455135878947171557129536267893854528665542602539062500e+00;
146      a[3] = -2.484960738877830532800317087094299495220184326171875000e-01;
147      a[4] =  1.253882314727246607977129144728678511455655097961425781e-02;
148      break;
149
150    case 88200:
151      b[0] =  9.221909851156021020734954163344809785485267639160156250e-02;
152      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
153      b[2] = -1.844381970231204204146990832668961957097053527832031250e-01;
154      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
155      b[4] =  9.221909851156021020734954163344809785485267639160156250e-02;
156      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
157      a[1] = -2.785795902923448696952846148633398115634918212890625000e+00;
158      a[2] =  2.727736758747444145711824603495188057422637939453125000e+00;
159      a[3] = -1.097007502819661528548067508381791412830352783203125000e+00;
160      a[4] =  1.550674356752141103132913713125162757933139801025390625e-01;
161      break;
162
163    case 96000:
164      b[0] =  8.182864044979756834585771230194950476288795471191406250e-02;
165      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
166      b[2] = -1.636572808995951366917154246038990095257759094238281250e-01;
167      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
168      b[4] =  8.182864044979756834585771230194950476288795471191406250e-02;
169      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
170      a[1] = -2.856378516857566829401093855267390608787536621093750000e+00;
171      a[2] =  2.897640237559524045707348705036565661430358886718750000e+00;
172      a[3] = -1.225265958339703198376469117647502571344375610351562500e+00;
173      a[4] =  1.840048283551226071530493300087982788681983947753906250e-01;
174      break;
175
176    case 192000:
177      b[0] =  2.784755468532278815940728122768632601946592330932617188e-02;
178      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
179      b[2] = -5.569510937064557631881456245537265203893184661865234375e-02;
180      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
181      b[4] =  2.784755468532278815940728122768632601946592330932617188e-02;
182      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
183      a[1] = -3.333298856144166322224009491037577390670776367187500000e+00;
184      a[2] =  4.111467536240339448738723149290308356285095214843750000e+00;
185      a[3] = -2.222889041651291641699117462849244475364685058593750000e+00;
186      a[4] =  4.447204118126878991112960193277103826403617858886718750e-01;
187      break;
188
189    default:
190      AUBIO_ERROR ( "sampling rate of C-weighting filter is %d, should be one of\
191 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 192000.\n", 
192 samplerate );
193      return 1;
194
195  }
196
197  return 0;
198}
199
200aubio_filter_t * new_aubio_filter_c_weighting (uint_t samplerate) {
201  aubio_filter_t * f = new_aubio_filter(5);
202  aubio_filter_set_c_weighting (f, samplerate);
203  return f;
204}
205
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