source: src/tempo/tempo.c @ 180eeca

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 180eeca was 56ef7e1, checked in by Paul Brossier <piem@piem.org>, 14 years ago

Change peakpicker to match API specs, make quadint per channel

  • src/mathutils.c
    • add per channel mean and median
    • update moving thres and adapt_thres accordingly
    • change quadint unused span argument to a channel argument
  • src/onset/onset.c:
    • make wasonset a vector for multi channel, use new peakpicker
  • src/onset/peakpick.c:
    • update peakpicker do for multi channeling
  • src/pitch/: update use to fvec_quadint
  • src/tempo/beattracking.c: update calls to fvec_quadint
  • src/tempo/tempo.c: update peakpicker usage
  • tests/src/test-peakpick.c: update peakpicker usage
  • Property mode set to 100644
File size: 5.3 KB
Line 
1/*
2   Copyright (C) 2006 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
20#include "aubio_priv.h"
21#include "fvec.h"
22#include "cvec.h"
23#include "onset/onsetdetection.h"
24#include "tempo/beattracking.h"
25#include "spectral/phasevoc.h"
26#include "onset/peakpick.h"
27#include "mathutils.h"
28#include "tempo/tempo.h"
29
30/* structure to store object state */
31struct _aubio_tempo_t {
32  aubio_onsetdetection_t * od;   /** onset detection */
33  aubio_pvoc_t * pv;             /** phase vocoder */
34  aubio_peakpicker_t * pp;       /** peak picker */
35  aubio_beattracking_t * bt;     /** beat tracking */
36  cvec_t * fftgrain;             /** spectral frame */
37  fvec_t * of;                   /** onset detection function value */
38  fvec_t * dfframe;              /** peak picked detection function buffer */
39  fvec_t * out;                  /** beat tactus candidates */
40  fvec_t * onset;                /** onset results */
41  fvec_t * peek;                 /** thresholded onset function */
42  smpl_t silence;                /** silence parameter */
43  smpl_t threshold;              /** peak picking threshold */
44  sint_t blockpos;               /** current position in dfframe */
45  uint_t winlen;                 /** dfframe bufsize */
46  uint_t step;                   /** dfframe hopsize */ 
47  uint_t samplerate;             /** sampling rate of the signal */ 
48};
49
50/* execute tempo detection function on iput buffer */
51void aubio_tempo_do(aubio_tempo_t *o, fvec_t * input, fvec_t * tempo)
52{
53  uint_t i;
54  uint_t winlen = o->winlen;
55  uint_t step   = o->step;
56  aubio_pvoc_do (o->pv, input, o->fftgrain);
57  aubio_onsetdetection_do (o->od, o->fftgrain, o->of);
58  /*if (usedoubled) {
59    aubio_onsetdetection_do(o2,fftgrain, onset2);
60    onset->data[0][0] *= onset2->data[0][0];
61  }*/
62  /* execute every overlap_size*step */
63  if (o->blockpos == (signed)step -1 ) {
64    /* check dfframe */
65    aubio_beattracking_do(o->bt,o->dfframe,o->out);
66    /* rotate dfframe */
67    for (i = 0 ; i < winlen - step; i++ ) 
68      o->dfframe->data[0][i] = o->dfframe->data[0][i+step];
69    for (i = winlen - step ; i < winlen; i++ ) 
70      o->dfframe->data[0][i] = 0.;
71    o->blockpos = -1;
72  }
73  o->blockpos++;
74  aubio_peakpicker_do (o->pp, o->of, o->onset);
75  tempo->data[0][1] = o->onset->data[0][0];
76  o->dfframe->data[0][winlen - step + o->blockpos] = 
77    aubio_peakpicker_get_thresholded_input(o->pp);
78  /* end of second level loop */
79  tempo->data[0][0] = 0; /* reset tactus */
80  i=0;
81  for (i = 1; i < o->out->data[0][0]; i++ ) {
82    /* if current frame is a predicted tactus */
83    if (o->blockpos == FLOOR(o->out->data[0][i])) {
84      tempo->data[0][0] = 1. + o->out->data[0][i] - FLOOR(o->out->data[0][i]); /* set tactus */
85      /* test for silence */
86      if (aubio_silence_detection(input, o->silence)==1) {
87        tempo->data[0][1] = 0; /* unset onset */
88      }
89    }
90  }
91}
92
93uint_t aubio_tempo_set_silence(aubio_tempo_t * o, smpl_t silence) {
94  o->silence = silence;
95  return AUBIO_OK;
96}
97
98uint_t aubio_tempo_set_threshold(aubio_tempo_t * o, smpl_t threshold) {
99  o->threshold = threshold;
100  aubio_peakpicker_set_threshold(o->pp, o->threshold);
101  return AUBIO_OK;
102}
103
104/* Allocate memory for an tempo detection */
105aubio_tempo_t * new_aubio_tempo (char_t * onset_mode, 
106    uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate)
107{
108  aubio_tempo_t * o = AUBIO_NEW(aubio_tempo_t);
109  o->samplerate = samplerate;
110  o->winlen = SQR(512)/hop_size;
111  o->step = o->winlen/4;
112  o->blockpos = 0;
113  o->threshold = 0.3;
114  o->silence = -90.;
115  o->blockpos = 0;
116  o->dfframe  = new_fvec(o->winlen,channels);
117  o->fftgrain = new_cvec(buf_size, channels);
118  o->out      = new_fvec(o->step,channels);
119  o->pv       = new_aubio_pvoc(buf_size, hop_size, channels);
120  o->pp       = new_aubio_peakpicker(channels);
121  aubio_peakpicker_set_threshold (o->pp, o->threshold);
122  o->od       = new_aubio_onsetdetection(onset_mode,buf_size,channels);
123  o->of       = new_fvec(1, channels);
124  o->bt       = new_aubio_beattracking(o->winlen,channels);
125  o->onset    = new_fvec(1, channels);
126  o->peek     = new_fvec(3, channels);
127  /*if (usedoubled)    {
128    o2 = new_aubio_onsetdetection(type_onset2,buffer_size,channels);
129    onset2 = new_fvec(1 , channels);
130  }*/
131  return o;
132}
133
134smpl_t aubio_tempo_get_bpm(aubio_tempo_t *o) {
135  return aubio_beattracking_get_bpm(o->bt);
136}
137
138smpl_t aubio_tempo_get_confidence(aubio_tempo_t *o) {
139  return aubio_beattracking_get_confidence(o->bt);
140}
141
142void del_aubio_tempo (aubio_tempo_t *o)
143{
144  del_aubio_onsetdetection(o->od);
145  del_aubio_beattracking(o->bt);
146  del_aubio_peakpicker(o->pp);
147  del_aubio_pvoc(o->pv);
148  del_fvec(o->out);
149  del_fvec(o->of);
150  del_cvec(o->fftgrain);
151  del_fvec(o->dfframe);
152  del_fvec(o->onset);
153  del_fvec(o->peek);
154  AUBIO_FREE(o);
155  return;
156}
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