source: src/temporal/c_weighting.c @ 1a6ef2c

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 1a6ef2c was 741bdda, checked in by Paul Brossier <piem@piem.org>, 15 years ago

src/temporal: switch to mono
  • 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  aubio_filter_set_samplerate (f, samplerate);
32  lvec_t *bs = aubio_filter_get_feedforward (f);
33  lvec_t *as = aubio_filter_get_feedback (f);
34  lsmp_t *b = bs->data, *a = as->data;
35  uint_t order = aubio_filter_get_order (f);
36
37  if ( order != 5 ) {
38    AUBIO_ERROR ("order of C-weighting filter must be 5, not %d\n", order);
39    return 1;
40  }
41
42  /* select coefficients according to sampling frequency */
43  switch (samplerate) {
44
45    case 8000:
46      b[0] =  6.782173932405135552414776611840352416038513183593750000e-01;
47      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
48      b[2] = -1.356434786481027110482955322368070483207702636718750000e+00;
49      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
50      b[4] =  6.782173932405135552414776611840352416038513183593750000e-01;
51      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
52      a[1] = -6.589092811505605773447769024642184376716613769531250000e-01;
53      a[2] = -1.179445664897062595599663836765103042125701904296875000e+00;
54      a[3] =  4.243329729632123736848825501510873436927795410156250000e-01;
55      a[4] =  4.147270002091348328754349950031610205769538879394531250e-01;
56      break;
57
58    case 11025:
59      b[0] =  6.002357155402652244546857218665536493062973022460937500e-01;
60      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
61      b[2] = -1.200471431080530448909371443733107298612594604492187500e+00;
62      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
63      b[4] =  6.002357155402652244546857218665536493062973022460937500e-01;
64      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
65      a[1] = -8.705602141280316397242700077185872942209243774414062500e-01;
66      a[2] = -9.037199507150940336330791069485712796449661254882812500e-01;
67      a[3] =  4.758433040929530011275971901341108605265617370605468750e-01;
68      a[4] =  2.987653956523212417373258631414500996470451354980468750e-01;
69      break;
70
71    case 16000:
72      b[0] =  4.971057193673903418229542694461997598409652709960937500e-01;
73      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
74      b[2] = -9.942114387347806836459085388923995196819305419921875000e-01;
75      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
76      b[4] =  4.971057193673903418229542694461997598409652709960937500e-01;
77      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
78      a[1] = -1.162322939286873690889478893950581550598144531250000000e+00;
79      a[2] = -4.771961355734982701548574368644040077924728393554687500e-01;
80      a[3] =  4.736145114694704227886745684372726827859878540039062500e-01;
81      a[4] =  1.660337524309875301131711466950946487486362457275390625e-01;
82      break;
83
84    case 22050:
85      b[0] =  4.033381299002754549754001800465630367398262023925781250e-01;
86      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
87      b[2] = -8.066762598005509099508003600931260734796524047851562500e-01;
88      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
89      b[4] =  4.033381299002754549754001800465630367398262023925781250e-01;
90      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
91      a[1] = -1.449545371157945350404361306573264300823211669921875000e+00;
92      a[2] = -1.030104190885922088583015465701464563608169555664062500e-02;
93      a[3] =  3.881857047554073680828423675848171114921569824218750000e-01;
94      a[4] =  7.171589940116777917022972133054281584918498992919921875e-02;
95      break;
96
97    case 24000:
98      b[0] =  3.786678621924967069745093795063439756631851196289062500e-01;
99      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
100      b[2] = -7.573357243849934139490187590126879513263702392578125000e-01;
101      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
102      b[4] =  3.786678621924967069745093795063439756631851196289062500e-01;
103      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
104      a[1] = -1.529945307555420797029910318087786436080932617187500000e+00;
105      a[2] =  1.283553182116208835061854642844991758465766906738281250e-01;
106      a[3] =  3.494608072385725350272878131363540887832641601562500000e-01;
107      a[4] =  5.217291949300089520802359288609295617789030075073242188e-02;
108      break;
109
110    case 32000:
111      b[0] =  2.977986488230693340462096330156782642006874084472656250e-01;
112      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
113      b[2] = -5.955972976461386680924192660313565284013748168945312500e-01;
114      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
115      b[4] =  2.977986488230693340462096330156782642006874084472656250e-01;
116      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
117      a[1] = -1.812455387128179218336754274787381291389465332031250000e+00;
118      a[2] =  6.425013281155662614452239722595550119876861572265625000e-01;
119      a[3] =  1.619857574578579817448087396769551560282707214355468750e-01;
120      a[4] =  7.987649713547682189807019881300220731645822525024414062e-03;
121      break;
122
123    case 44100:
124      b[0] =  2.170085619492190254220531642204150557518005371093750000e-01;
125      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
126      b[2] = -4.340171238984380508441063284408301115036010742187500000e-01;
127      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
128      b[4] =  2.170085619492190254220531642204150557518005371093750000e-01;
129      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
130      a[1] = -2.134674963687040794013682898366823792457580566406250000e+00;
131      a[2] =  1.279333533236062692139967111870646476745605468750000000e+00;
132      a[3] = -1.495598460893957093453821016737492755055427551269531250e-01;
133      a[4] =  4.908700174624683852664386307651511742733418941497802734e-03;
134      break;
135
136    case 48000:
137      b[0] =  1.978871200263932761398422144338837824761867523193359375e-01;
138      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
139      b[2] = -3.957742400527865522796844288677675649523735046386718750e-01;
140      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
141      b[4] =  1.978871200263932761398422144338837824761867523193359375e-01;
142      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
143      a[1] = -2.219172914052801814932536217384040355682373046875000000e+00;
144      a[2] =  1.455135878947171557129536267893854528665542602539062500e+00;
145      a[3] = -2.484960738877830532800317087094299495220184326171875000e-01;
146      a[4] =  1.253882314727246607977129144728678511455655097961425781e-02;
147      break;
148
149    case 88200:
150      b[0] =  9.221909851156021020734954163344809785485267639160156250e-02;
151      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
152      b[2] = -1.844381970231204204146990832668961957097053527832031250e-01;
153      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
154      b[4] =  9.221909851156021020734954163344809785485267639160156250e-02;
155      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
156      a[1] = -2.785795902923448696952846148633398115634918212890625000e+00;
157      a[2] =  2.727736758747444145711824603495188057422637939453125000e+00;
158      a[3] = -1.097007502819661528548067508381791412830352783203125000e+00;
159      a[4] =  1.550674356752141103132913713125162757933139801025390625e-01;
160      break;
161
162    case 96000:
163      b[0] =  8.182864044979756834585771230194950476288795471191406250e-02;
164      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
165      b[2] = -1.636572808995951366917154246038990095257759094238281250e-01;
166      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
167      b[4] =  8.182864044979756834585771230194950476288795471191406250e-02;
168      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
169      a[1] = -2.856378516857566829401093855267390608787536621093750000e+00;
170      a[2] =  2.897640237559524045707348705036565661430358886718750000e+00;
171      a[3] = -1.225265958339703198376469117647502571344375610351562500e+00;
172      a[4] =  1.840048283551226071530493300087982788681983947753906250e-01;
173      break;
174
175    case 192000:
176      b[0] =  2.784755468532278815940728122768632601946592330932617188e-02;
177      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
178      b[2] = -5.569510937064557631881456245537265203893184661865234375e-02;
179      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
180      b[4] =  2.784755468532278815940728122768632601946592330932617188e-02;
181      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
182      a[1] = -3.333298856144166322224009491037577390670776367187500000e+00;
183      a[2] =  4.111467536240339448738723149290308356285095214843750000e+00;
184      a[3] = -2.222889041651291641699117462849244475364685058593750000e+00;
185      a[4] =  4.447204118126878991112960193277103826403617858886718750e-01;
186      break;
187
188    default:
189      AUBIO_ERROR ( "sampling rate of C-weighting filter is %d, should be one of\
190 8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000, 88200, 96000, 192000.\n", 
191 samplerate );
192      return 1;
193
194  }
195
196  return 0;
197}
198
199aubio_filter_t * new_aubio_filter_c_weighting (uint_t samplerate) {
200  aubio_filter_t * f = new_aubio_filter(5);
201  aubio_filter_set_c_weighting (f, samplerate);
202  return f;
203}
204
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