source: src/onset/onset.c @ 376946a

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 376946a was 376946a, checked in by Paul Brossier <piem@piem.org>, 11 years ago

src/onset/onset.c: quick fix to get very first frame of file

  • Property mode set to 100644
File size: 4.3 KB
Line 
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/peakpicker.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  uint_t hop_size;              /**< number of samples between two runs */ 
43};
44
45/* execute onset detection function on iput buffer */
46void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
47{
48  smpl_t isonset = 0;
49  smpl_t wasonset = 0;
50  aubio_pvoc_do (o->pv,input, o->fftgrain);
51  aubio_specdesc_do (o->od,o->fftgrain, o->of);
52  aubio_peakpicker_do(o->pp, o->of, onset);
53  isonset = onset->data[0];
54  wasonset = o->wasonset->data[0];
55  if (isonset > 0.) {
56    if (aubio_silence_detection(input, o->silence)==1) {
57      isonset  = 0;
58      wasonset++;
59    } else {
60      if (wasonset > o->minioi) {
61        wasonset = 0;
62      } else {
63        isonset  = 0;
64        wasonset++;
65      }
66    }
67  } else {
68    if (wasonset == -1 && aubio_silence_detection(input, o->silence) == 0) {
69      //AUBIO_MSG("beginning of file is not silent, marking as onset\n",
70      //  wasonset, aubio_silence_detection(input, o->silence));
71      isonset = 4;
72      wasonset = 0;
73    }
74    wasonset++;
75  }
76  o->wasonset->data[0] = wasonset;
77  onset->data[0] = isonset;
78  return;
79}
80
81smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
82    return o->of->data[0];
83}
84
85smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
86    fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
87    return thresholded->data[0];
88}
89
90uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
91  o->silence = silence;
92  return AUBIO_OK;
93}
94
95uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
96  o->threshold = threshold;
97  aubio_peakpicker_set_threshold(o->pp, o->threshold);
98  return AUBIO_OK;
99}
100
101uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
102  o->minioi = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
103  return AUBIO_OK;
104}
105
106/* Allocate memory for an onset detection */
107aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
108    uint_t buf_size, uint_t hop_size, uint_t samplerate)
109{
110  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
111  /** set some default parameter */
112  o->threshold = 0.3;
113  o->minioi    = 4;
114  o->silence   = -70;
115  o->wasonset  = new_fvec(1);
116  o->wasonset->data[0] = -1.;
117  o->samplerate = samplerate;
118  o->hop_size = hop_size;
119  o->pv = new_aubio_pvoc(buf_size, hop_size);
120  o->pp = new_aubio_peakpicker();
121  aubio_peakpicker_set_threshold (o->pp, o->threshold);
122  o->od = new_aubio_specdesc(onset_mode,buf_size);
123  o->fftgrain = new_cvec(buf_size);
124  o->of = new_fvec(1);
125  /*if (usedoubled)    {
126    o2 = new_aubio_specdesc(onset_type2,buffer_size);
127    onset2 = new_fvec(1);
128  }*/
129  return o;
130}
131
132void del_aubio_onset (aubio_onset_t *o)
133{
134  del_aubio_specdesc(o->od);
135  del_aubio_peakpicker(o->pp);
136  del_aubio_pvoc(o->pv);
137  del_fvec(o->of);
138  del_fvec(o->wasonset);
139  del_cvec(o->fftgrain);
140  AUBIO_FREE(o);
141}
Note: See TracBrowser for help on using the repository browser.