source: src/onset/onset.c @ 8b884ef

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 8b884ef was 8b884ef, checked in by Paul Brossier <piem@piem.org>, 11 years ago

src/onset/: rename get_last_onset to get_last

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File size: 6.0 KB
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1/*
2  Copyright (C) 2006-2013 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;        /**< spectral descriptor */
34  aubio_peakpicker_t * pp;      /**< peak picker */
35  cvec_t * fftgrain;            /**< phase vocoder output */
36  fvec_t * desc;                /**< spectral description */
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->desc);
54  aubio_peakpicker_do(o->pp, o->desc, onset);
55  isonset = onset->data[0];
56  if (isonset > 0.) {
57    if (aubio_silence_detection(input, o->silence)==1) {
58      //AUBIO_DBG ("silent onset, not marking as onset\n");
59      isonset  = 0;
60    } else {
61      uint_t new_onset = o->total_frames + (uint_t)ROUND(isonset * o->hop_size);
62      if (o->last_onset + o->minioi < new_onset) {
63        //AUBIO_DBG ("accepted detection, marking as onset\n");
64        o->last_onset = new_onset;
65      } else {
66        //AUBIO_DBG ("doubled onset, not marking as onset\n");
67        isonset  = 0;
68      }
69    }
70  } else {
71    // we are at the beginning of the file, and we don't find silence
72    if (o->total_frames == 0 && aubio_silence_detection(input, o->silence) == 0) {
73      //AUBIO_DBG ("beginning of file is not silent, marking as onset\n");
74      isonset = o->delay / o->hop_size;
75      o->last_onset = o->delay;
76    }
77  }
78  onset->data[0] = isonset;
79  o->total_frames += o->hop_size;
80  return;
81}
82
83uint_t aubio_onset_get_last (aubio_onset_t *o)
84{
85  return o->last_onset - o->delay;
86}
87
88smpl_t aubio_onset_get_last_s (aubio_onset_t *o)
89{
90  return aubio_onset_get_last (o) / (smpl_t) (o->samplerate);
91}
92
93smpl_t aubio_onset_get_last_ms (aubio_onset_t *o)
94{
95  return aubio_onset_get_last_s (o) / 1000.;
96}
97
98uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
99  o->silence = silence;
100  return AUBIO_OK;
101}
102
103uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
104  o->threshold = threshold;
105  aubio_peakpicker_set_threshold(o->pp, o->threshold);
106  return AUBIO_OK;
107}
108
109uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
110  o->minioi = minioi;
111  return AUBIO_OK;
112}
113
114uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
115  return o->minioi;
116}
117
118uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
119  return aubio_onset_set_minioi (o, minioi * o->samplerate);
120}
121
122smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
123  return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
124}
125
126uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
127  return aubio_onset_set_minioi_s (o, minioi / 1000.);
128}
129
130smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
131  return aubio_onset_get_minioi_s (o) * 1000.;
132}
133
134uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
135  o->delay = delay;
136  return AUBIO_OK;
137}
138
139uint_t aubio_onset_get_delay(aubio_onset_t * o) {
140  return o->delay;
141}
142
143uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
144  return aubio_onset_set_delay (o, delay * o->samplerate);
145}
146
147smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
148  return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
149}
150
151uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
152  return aubio_onset_set_delay_s (o, delay / 1000.);
153}
154
155smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
156  return aubio_onset_get_delay_s (o) * 1000.;
157}
158
159smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
160  return o->desc->data[0];
161}
162
163smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
164  fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
165  return thresholded->data[0];
166}
167
168/* Allocate memory for an onset detection */
169aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
170    uint_t buf_size, uint_t hop_size, uint_t samplerate)
171{
172  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
173  /** set some default parameter */
174  o->samplerate = samplerate;
175  o->hop_size = hop_size;
176  o->last_onset = 0;
177  o->threshold = 0.3;
178  o->delay     = 4.3 * hop_size;
179  o->minioi    = 5 * hop_size;
180  o->silence   = -70;
181  o->total_frames = 0;
182  o->pv = new_aubio_pvoc(buf_size, o->hop_size);
183  o->pp = new_aubio_peakpicker();
184  aubio_peakpicker_set_threshold (o->pp, o->threshold);
185  o->od = new_aubio_specdesc(onset_mode,buf_size);
186  o->fftgrain = new_cvec(buf_size);
187  o->desc = new_fvec(1);
188  return o;
189}
190
191void del_aubio_onset (aubio_onset_t *o)
192{
193  del_aubio_specdesc(o->od);
194  del_aubio_peakpicker(o->pp);
195  del_aubio_pvoc(o->pv);
196  del_fvec(o->desc);
197  del_cvec(o->fftgrain);
198  AUBIO_FREE(o);
199}
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