source: src/onset/onset.c @ 31907fd

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 31907fd was 31907fd, checked in by Paul Brossier <piem@piem.org>, 14 years ago

src/spectral/specdesc.{c,h}: rename aubio_onsetdetection to aubio_specdesc

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File size: 3.9 KB
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1/*
2  Copyright (C) 2006-2009 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 "fvec.h"
23#include "cvec.h"
24#include "spectral/specdesc.h"
25#include "spectral/phasevoc.h"
26#include "onset/peakpick.h"
27#include "mathutils.h"
28#include "onset/onset.h"
29
30/** structure to store object state */
31struct _aubio_onset_t {
32  aubio_pvoc_t * pv;            /**< phase vocoder */
33  aubio_specdesc_t * od;  /**< onset detection */ 
34  aubio_peakpicker_t * pp;      /**< peak picker */
35  cvec_t * fftgrain;            /**< phase vocoder output */
36  fvec_t * of;                  /**< onset detection function */
37  smpl_t threshold;             /**< onset peak picking threshold */
38  smpl_t silence;               /**< silence threhsold */
39  uint_t minioi;                /**< minimum inter onset interval */
40  fvec_t * wasonset;            /**< number of frames since last onset */
41  uint_t samplerate;            /**< sampling rate of the input signal */
42};
43
44/* execute onset detection function on iput buffer */
45void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
46{
47  smpl_t isonset = 0;
48  smpl_t wasonset = 0;
49  uint_t i;
50  aubio_pvoc_do (o->pv,input, o->fftgrain);
51  aubio_specdesc_do (o->od,o->fftgrain, o->of);
52  /*if (usedoubled) {
53    aubio_specdesc_do (o2,fftgrain, onset2);
54    onset->data[0][0] *= onset2->data[0][0];
55  }*/
56  aubio_peakpicker_do(o->pp, o->of, onset);
57  for (i = 0; i < input->channels; i++) {
58  isonset = onset->data[i][0];
59  wasonset = o->wasonset->data[i][0];
60  if (isonset > 0.) {
61    if (aubio_silence_detection(input, o->silence)==1) {
62      isonset  = 0;
63      wasonset++;
64    } else {
65      if (wasonset > o->minioi) {
66        wasonset = 0;
67      } else {
68        isonset  = 0;
69        wasonset++;
70      }
71    }
72  } else {
73    wasonset++;
74  }
75  o->wasonset->data[i][0] = wasonset;
76  onset->data[i][0] = isonset;
77  }
78  return;
79}
80
81uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
82  o->silence = silence;
83  return AUBIO_OK;
84}
85
86uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
87  o->threshold = threshold;
88  aubio_peakpicker_set_threshold(o->pp, o->threshold);
89  return AUBIO_OK;
90}
91
92uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
93  o->minioi = minioi;
94  return AUBIO_OK;
95}
96
97/* Allocate memory for an onset detection */
98aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
99    uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate)
100{
101  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
102  /** set some default parameter */
103  o->threshold = 0.3;
104  o->minioi    = 4;
105  o->silence   = -70;
106  o->wasonset  = new_fvec(1, channels);
107  o->samplerate = samplerate;
108  o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
109  o->pp = new_aubio_peakpicker(channels);
110  aubio_peakpicker_set_threshold (o->pp, o->threshold);
111  o->od = new_aubio_specdesc(onset_mode,buf_size,channels);
112  o->fftgrain = new_cvec(buf_size,channels);
113  o->of = new_fvec(1, channels);
114  /*if (usedoubled)    {
115    o2 = new_aubio_specdesc(onset_type2,buffer_size,channels);
116    onset2 = new_fvec(1 , channels);
117  }*/
118  return o;
119}
120
121void del_aubio_onset (aubio_onset_t *o)
122{
123  del_aubio_specdesc(o->od);
124  del_aubio_peakpicker(o->pp);
125  del_aubio_pvoc(o->pv);
126  del_fvec(o->of);
127  del_fvec(o->wasonset);
128  del_cvec(o->fftgrain);
129  AUBIO_FREE(o);
130}
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