source: src/onset/onset.c @ 35f73b8c

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 35f73b8c was 35f73b8c, checked in by Paul Brossier <piem@piem.org>, 8 years ago

src/onset/: remove wasonset, add getters and setters, improve doc

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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/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 description function */
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  uint_t delay;                 /**< constant delay, in samples, removed from detected onset times */
41  uint_t samplerate;            /**< sampling rate of the input signal */
42  uint_t hop_size;              /**< number of samples between two runs */
43
44  uint_t total_frames;          /**< total number of frames processed since the beginning */
45  uint_t last_onset;            /**< last detected onset location, in frames */
46};
47
48/* execute onset detection function on iput buffer */
49void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
50{
51  smpl_t isonset = 0;
52  aubio_pvoc_do (o->pv,input, o->fftgrain);
53  aubio_specdesc_do (o->od,o->fftgrain, o->of);
54  aubio_peakpicker_do(o->pp, o->of, onset);
55  isonset = onset->data[0];
56  if (isonset > 0.) {
57    if (aubio_silence_detection(input, o->silence)==1) {
58      isonset  = 0;
59    } else {
60      uint_t new_onset = o->total_frames + isonset * o->hop_size;
61      if (o->last_onset + o->minioi < new_onset) {
62        o->last_onset = new_onset;
63      } else {
64        isonset  = 0;
65      }
66    }
67  } else {
68    // we are at the beginning of the file, and we don't find silence
69    if (o->total_frames == 0 && aubio_silence_detection(input, o->silence) == 0) {
70      //AUBIO_DBG ("beginning of file is not silent, marking as onset\n");
71      isonset = o->delay / o->hop_size;
72      o->last_onset = o->delay;
73    }
74  }
75  onset->data[0] = isonset;
76  o->total_frames += o->hop_size;
77  return;
78}
79
80smpl_t aubio_onset_get_last_onset (aubio_onset_t *o)
81{
82  return o->last_onset - o->delay;
83}
84
85smpl_t aubio_onset_get_last_onset_s (aubio_onset_t *o)
86{
87  return aubio_onset_get_last_onset (o) / (smpl_t) (o->samplerate);
88}
89
90smpl_t aubio_onset_get_last_onset_ms (aubio_onset_t *o)
91{
92  return aubio_onset_get_last_onset_s (o) / 1000.;
93}
94
95uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
96  o->silence = silence;
97  return AUBIO_OK;
98}
99
100uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
101  o->threshold = threshold;
102  aubio_peakpicker_set_threshold(o->pp, o->threshold);
103  return AUBIO_OK;
104}
105
106uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
107  o->minioi = minioi;
108  return AUBIO_OK;
109}
110
111uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
112  return o->minioi;
113}
114
115uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
116  return aubio_onset_set_minioi (o, minioi * o->samplerate);
117}
118
119smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
120  return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
121}
122
123uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
124  return aubio_onset_set_minioi_s (o, minioi / 1000.);
125}
126
127smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
128  return aubio_onset_get_minioi_s (o) * 1000.;
129}
130
131uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
132  o->delay = delay;
133  return AUBIO_OK;
134}
135
136uint_t aubio_onset_get_delay(aubio_onset_t * o) {
137  return o->delay;
138}
139
140uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
141  return aubio_onset_set_delay (o, delay * o->samplerate);
142}
143
144smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
145  return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
146}
147
148uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
149  return aubio_onset_set_delay_s (o, delay / 1000.);
150}
151
152smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
153  return aubio_onset_get_delay_s (o) * 1000.;
154}
155
156smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
157  return o->of->data[0];
158}
159
160smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
161  fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
162  return thresholded->data[0];
163}
164
165/* Allocate memory for an onset detection */
166aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
167    uint_t buf_size, uint_t hop_size, uint_t samplerate)
168{
169  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
170  /** set some default parameter */
171  o->samplerate = samplerate;
172  o->hop_size = hop_size;
173  o->last_onset = 0;
174  o->threshold = 0.3;
175  o->delay     = 4.3 * hop_size;
176  o->minioi    = 5 * hop_size;
177  o->silence   = -70;
178  o->total_frames = 0;
179  o->pv = new_aubio_pvoc(buf_size, o->hop_size);
180  o->pp = new_aubio_peakpicker();
181  aubio_peakpicker_set_threshold (o->pp, o->threshold);
182  o->od = new_aubio_specdesc(onset_mode,buf_size);
183  o->fftgrain = new_cvec(buf_size);
184  o->of = new_fvec(1);
185  return o;
186}
187
188void del_aubio_onset (aubio_onset_t *o)
189{
190  del_aubio_specdesc(o->od);
191  del_aubio_peakpicker(o->pp);
192  del_aubio_pvoc(o->pv);
193  del_fvec(o->of);
194  del_cvec(o->fftgrain);
195  AUBIO_FREE(o);
196}
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