source: src/pitchdetection.c @ ec399cf

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since ec399cf was 475da2f, checked in by Paul Brossier <piem@altern.org>, 18 years ago

add documentation for _aubio_pitchdetection_t
add documentation for _aubio_pitchdetection_t
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1/*
2   Copyright (C) 2003 Paul Brossier
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17*/
18
19#include "aubio_priv.h"
20#include "sample.h"
21#include "phasevoc.h"
22#include "mathutils.h"
23#include "filter.h"
24#include "pitchmcomb.h"
25#include "pitchyin.h"
26#include "pitchfcomb.h"
27#include "pitchschmitt.h"
28#include "pitchyinfft.h"
29#include "pitchdetection.h"
30
31typedef smpl_t (*aubio_pitchdetection_func_t)(aubio_pitchdetection_t *p, 
32                fvec_t * ibuf);
33typedef smpl_t (*aubio_pitchdetection_conv_t)(smpl_t value,uint_t srate,uint_t bufsize);
34void aubio_pitchdetection_slideblock(aubio_pitchdetection_t *p, fvec_t *ibuf);
35
36smpl_t aubio_pitchdetection_mcomb(aubio_pitchdetection_t *p, fvec_t * ibuf);
37smpl_t aubio_pitchdetection_yin(aubio_pitchdetection_t *p, fvec_t *ibuf);
38smpl_t aubio_pitchdetection_schmitt(aubio_pitchdetection_t *p, fvec_t *ibuf);
39smpl_t aubio_pitchdetection_fcomb(aubio_pitchdetection_t *p, fvec_t *ibuf);
40smpl_t aubio_pitchdetection_yinfft(aubio_pitchdetection_t *p, fvec_t *ibuf);
41
42/** generic pitch detection structure */
43struct _aubio_pitchdetection_t {
44  aubio_pitchdetection_type type; /**< pitch detection mode */
45  aubio_pitchdetection_mode mode; /**< pitch detection output mode */
46  uint_t srate;                   /**< samplerate */
47  uint_t bufsize;                 /**< buffer size */
48  aubio_pitchmcomb_t * mcomb;     /**< mcomb object */
49  aubio_pitchfcomb_t * fcomb;     /**< fcomb object */
50  aubio_pitchschmitt_t * schmitt; /**< schmitt object */
51  aubio_pitchyinfft_t * yinfft;   /**< yinfft object */
52  aubio_filter_t * filter;        /**< filter */
53  aubio_pvoc_t * pv;              /**< phase vocoder for mcomb */ 
54  cvec_t * fftgrain;              /**< spectral frame for mcomb */
55  fvec_t * buf;                   /**< temporary buffer for yin */
56  fvec_t * yin;                   /**< yin function */
57  smpl_t yinthres;                /**< yin peak picking threshold parameter */
58  aubio_pitchdetection_func_t callback; /**< pointer to current pitch detection method */
59  aubio_pitchdetection_conv_t freqconv; /**< pointer to current pitch conversion method */ 
60};
61
62/* convenience wrapper function for frequency unit conversions
63 * should probably be rewritten with #defines */
64smpl_t freqconvbin(smpl_t f,uint_t srate,uint_t bufsize);
65smpl_t freqconvbin(smpl_t f,uint_t srate,uint_t bufsize){
66        return aubio_freqtobin(f,srate,bufsize);
67}
68
69smpl_t freqconvmidi(smpl_t f,uint_t srate,uint_t bufsize);
70smpl_t freqconvmidi(smpl_t f,uint_t srate,uint_t bufsize){
71        return aubio_freqtomidi(f);
72}
73
74smpl_t freqconvpass(smpl_t f,uint_t srate,uint_t bufsize);
75smpl_t freqconvpass(smpl_t f,uint_t srate,uint_t bufsize){
76        return f;
77}
78
79aubio_pitchdetection_t * new_aubio_pitchdetection(uint_t bufsize, 
80                uint_t hopsize, 
81                uint_t channels,
82                uint_t samplerate,
83                aubio_pitchdetection_type type,
84                aubio_pitchdetection_mode mode)
85{
86        aubio_pitchdetection_t *p = AUBIO_NEW(aubio_pitchdetection_t);
87        p->srate = samplerate;
88        p->type = type;
89        p->mode = mode;
90        p->bufsize = bufsize;
91        switch(p->type) {
92                case aubio_pitch_yin:
93                        p->buf      = new_fvec(bufsize,channels);
94                        p->yin      = new_fvec(bufsize/2,channels);
95                        p->callback = aubio_pitchdetection_yin;
96                        p->yinthres = 0.15;
97                        break;
98                case aubio_pitch_mcomb:
99                        p->pv       = new_aubio_pvoc(bufsize, hopsize, channels);
100                        p->fftgrain = new_cvec(bufsize, channels);
101                        p->mcomb    = new_aubio_pitchmcomb(bufsize,hopsize,channels,samplerate);
102                        p->filter   = new_aubio_cdsgn_filter(samplerate);
103                        p->callback = aubio_pitchdetection_mcomb;
104                        break;
105                case aubio_pitch_fcomb:
106                        p->buf      = new_fvec(bufsize,channels);
107                        p->fcomb    = new_aubio_pitchfcomb(bufsize,hopsize,samplerate);
108                        p->callback = aubio_pitchdetection_fcomb;
109                        break;
110                case aubio_pitch_schmitt:
111                        p->buf      = new_fvec(bufsize,channels);
112                        p->schmitt  = new_aubio_pitchschmitt(bufsize,samplerate);
113                        p->callback = aubio_pitchdetection_schmitt;
114                        break;
115                case aubio_pitch_yinfft:
116                        p->buf      = new_fvec(bufsize,channels);
117                        p->yinfft   = new_aubio_pitchyinfft(bufsize);
118                        p->callback = aubio_pitchdetection_yinfft;
119                        p->yinthres = 0.85;
120                        break;
121                default:
122                        break;
123        }
124        switch(p->mode) {
125                case aubio_pitchm_freq:
126                        p->freqconv = freqconvpass;
127                        break;
128                case aubio_pitchm_midi:
129                        p->freqconv = freqconvmidi;
130                        break;
131                case aubio_pitchm_cent:
132                        /* bug: not implemented */
133                        p->freqconv = freqconvmidi;
134                        break;
135                case aubio_pitchm_bin:
136                        p->freqconv = freqconvbin;
137                        break;
138                default:
139                        break;
140        }
141        return p;
142}
143
144void del_aubio_pitchdetection(aubio_pitchdetection_t * p) {
145        switch(p->type) {
146                case aubio_pitch_yin:
147                        del_fvec(p->yin);
148                        del_fvec(p->buf);
149                        break;
150                case aubio_pitch_mcomb:
151                        del_aubio_pvoc(p->pv);
152                        del_cvec(p->fftgrain);
153                        del_aubio_pitchmcomb(p->mcomb);
154                        break;
155                case aubio_pitch_schmitt:
156                        del_fvec(p->buf);
157                        del_aubio_pitchschmitt(p->schmitt);
158                        break;
159                case aubio_pitch_fcomb:
160                        del_fvec(p->buf);
161                        del_aubio_pitchfcomb(p->fcomb);
162                        break;
163                case aubio_pitch_yinfft:
164                        del_fvec(p->buf);
165                        del_aubio_pitchyinfft(p->yinfft);
166                        break;
167                default:
168                        break;
169        }
170        AUBIO_FREE(p);
171}
172
173void aubio_pitchdetection_slideblock(aubio_pitchdetection_t *p, fvec_t *ibuf){
174        uint_t i,j = 0, overlap_size = 0;
175        overlap_size = p->buf->length-ibuf->length;
176        for (i=0;i<p->buf->channels;i++){
177                for (j=0;j<overlap_size;j++){
178                        p->buf->data[i][j] = 
179                                p->buf->data[i][j+ibuf->length];
180                }
181        }
182        for (i=0;i<ibuf->channels;i++){
183                for (j=0;j<ibuf->length;j++){
184                        p->buf->data[i][j+overlap_size] = 
185                                ibuf->data[i][j];
186                }
187        }
188}
189
190void aubio_pitchdetection_set_yinthresh(aubio_pitchdetection_t *p, smpl_t thres) {
191        p->yinthres = thres;
192}
193
194smpl_t aubio_pitchdetection(aubio_pitchdetection_t *p, fvec_t * ibuf) {
195        return p->freqconv(p->callback(p,ibuf),p->srate,p->bufsize);
196}
197
198smpl_t aubio_pitchdetection_mcomb(aubio_pitchdetection_t *p, fvec_t *ibuf) {
199        smpl_t pitch = 0.;
200        aubio_filter_do(p->filter,ibuf);
201        aubio_pvoc_do(p->pv,ibuf,p->fftgrain);
202        pitch = aubio_pitchmcomb_detect(p->mcomb,p->fftgrain);
203        /** \bug should move the >0 check within aubio_bintofreq */
204        if (pitch>0.) {
205                pitch = aubio_bintofreq(pitch,p->srate,p->bufsize);
206        } else {
207                pitch = 0.;
208        }
209        return pitch;
210}
211
212smpl_t aubio_pitchdetection_yin(aubio_pitchdetection_t *p, fvec_t *ibuf) {
213        smpl_t pitch = 0.;
214        aubio_pitchdetection_slideblock(p,ibuf);
215        pitch = aubio_pitchyin_getpitchfast(p->buf,p->yin, p->yinthres);
216        if (pitch>0) {
217                pitch = p->srate/(pitch+0.);
218        } else {
219                pitch = 0.;
220        }
221        return pitch;
222}
223
224
225smpl_t aubio_pitchdetection_yinfft(aubio_pitchdetection_t *p, fvec_t *ibuf){
226        smpl_t pitch = 0.;
227        aubio_pitchdetection_slideblock(p,ibuf);
228        pitch = aubio_pitchyinfft_detect(p->yinfft,p->buf,p->yinthres);
229        if (pitch>0) {
230                pitch = p->srate/(pitch+0.);
231        } else {
232                pitch = 0.;
233        }
234        return pitch; 
235}
236
237smpl_t aubio_pitchdetection_fcomb(aubio_pitchdetection_t *p, fvec_t *ibuf){
238        aubio_pitchdetection_slideblock(p,ibuf);
239        return aubio_pitchfcomb_detect(p->fcomb,p->buf);
240}
241
242smpl_t aubio_pitchdetection_schmitt(aubio_pitchdetection_t *p, fvec_t *ibuf){
243        aubio_pitchdetection_slideblock(p,ibuf);
244        return aubio_pitchschmitt_detect(p->schmitt,p->buf);
245}
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