source: src/temporal/c_weighting.c @ c159aeb

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since c159aeb was c159aeb, checked in by Paul Brossier <piem@piem.org>, 13 years ago

src/temporal: rename adesign/adsgn to a_weighting, idem for c_weighting

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File size: 6.3 KB
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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
28void aubio_filter_set_c_weighting (aubio_filter_t * f) {
29
30  uint_t samplerate = aubio_filter_get_samplerate (f);
31  lvec_t * bs = aubio_filter_get_feedforward (f);
32  lvec_t * as = aubio_filter_get_feedback (f);
33  lsmp_t *b = bs->data[0], *a = as->data[0];
34  uint_t order = aubio_filter_get_order (f);
35
36  if ( order != 5 ) {
37    AUBIO_ERROR ( "order of C-weighting filter must be 5, not %d\n", order );
38    return;
39  }
40
41  /* select coefficients according to sampling frequency */
42  switch ( samplerate ) {
43
44    case 8000:
45      b[0] =  6.782173932405135552414776611840352416038513183593750000e-01;
46      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
47      b[2] = -1.356434786481027110482955322368070483207702636718750000e+00;
48      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
49      b[4] =  6.782173932405135552414776611840352416038513183593750000e-01;
50      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
51      a[1] = -6.589092811505605773447769024642184376716613769531250000e-01;
52      a[2] = -1.179445664897062595599663836765103042125701904296875000e+00;
53      a[3] =  4.243329729632123736848825501510873436927795410156250000e-01;
54      a[4] =  4.147270002091348328754349950031610205769538879394531250e-01;
55      break;
56
57    case 16000:
58      b[0] =  4.971057193673903418229542694461997598409652709960937500e-01;
59      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
60      b[2] = -9.942114387347806836459085388923995196819305419921875000e-01;
61      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
62      b[4] =  4.971057193673903418229542694461997598409652709960937500e-01;
63      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
64      a[1] = -1.162322939286873690889478893950581550598144531250000000e+00;
65      a[2] = -4.771961355734982701548574368644040077924728393554687500e-01;
66      a[3] =  4.736145114694704227886745684372726827859878540039062500e-01;
67      a[4] =  1.660337524309875301131711466950946487486362457275390625e-01;
68      break;
69
70    case 22050:
71      b[0] =  4.033381299002754549754001800465630367398262023925781250e-01;
72      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
73      b[2] = -8.066762598005509099508003600931260734796524047851562500e-01;
74      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
75      b[4] =  4.033381299002754549754001800465630367398262023925781250e-01;
76      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
77      a[1] = -1.449545371157945350404361306573264300823211669921875000e+00;
78      a[2] = -1.030104190885922088583015465701464563608169555664062500e-02;
79      a[3] =  3.881857047554073680828423675848171114921569824218750000e-01;
80      a[4] =  7.171589940116777917022972133054281584918498992919921875e-02;
81      break;
82
83    case 44100:
84      b[0] =  2.170085619492190254220531642204150557518005371093750000e-01;
85      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
86      b[2] = -4.340171238984380508441063284408301115036010742187500000e-01;
87      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
88      b[4] =  2.170085619492190254220531642204150557518005371093750000e-01;
89      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
90      a[1] = -2.134674963687040794013682898366823792457580566406250000e+00;
91      a[2] =  1.279333533236062692139967111870646476745605468750000000e+00;
92      a[3] = -1.495598460893957093453821016737492755055427551269531250e-01;
93      a[4] =  4.908700174624683852664386307651511742733418941497802734e-03;
94      break;
95
96    case 96000:
97      b[0] =  8.182864044979756834585771230194950476288795471191406250e-02;
98      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
99      b[2] = -1.636572808995951366917154246038990095257759094238281250e-01;
100      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
101      b[4] =  8.182864044979756834585771230194950476288795471191406250e-02;
102      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
103      a[1] = -2.856378516857566829401093855267390608787536621093750000e+00;
104      a[2] =  2.897640237559524045707348705036565661430358886718750000e+00;
105      a[3] = -1.225265958339703198376469117647502571344375610351562500e+00;
106      a[4] =  1.840048283551226071530493300087982788681983947753906250e-01;
107      break;
108
109    case 192000:
110      b[0] =  2.784755468532278815940728122768632601946592330932617188e-02;
111      b[1] =  0.000000000000000000000000000000000000000000000000000000e+00;
112      b[2] = -5.569510937064557631881456245537265203893184661865234375e-02;
113      b[3] =  0.000000000000000000000000000000000000000000000000000000e+00;
114      b[4] =  2.784755468532278815940728122768632601946592330932617188e-02;
115      a[0] =  1.000000000000000000000000000000000000000000000000000000e+00;
116      a[1] = -3.333298856144166322224009491037577390670776367187500000e+00;
117      a[2] =  4.111467536240339448738723149290308356285095214843750000e+00;
118      a[3] = -2.222889041651291641699117462849244475364685058593750000e+00;
119      a[4] =  4.447204118126878991112960193277103826403617858886718750e-01;
120      break;
121
122    default:
123      AUBIO_ERROR ( "sampling rate of C-weighting filter is %d, should be one of\
124 8000, 16000, 22050, 44100, 96000, 192000.\n",  samplerate );
125      break;
126
127  }
128
129}
130
131aubio_filter_t * new_aubio_filter_c_weighting (uint_t samplerate, uint_t channels) {
132  aubio_filter_t * f = new_aubio_filter(samplerate, 5, channels);
133  aubio_filter_set_c_weighting (f);
134  return f;
135}
136
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