2 Copyright (C) 2006-2013 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
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.
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.
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/>.
21 #include "aubio_priv.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"
30 /** structure to store object state */
31 struct _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 silence; /**< silence threhsold */
38 uint_t minioi; /**< minimum inter onset interval */
39 uint_t delay; /**< constant delay, in samples, removed from detected onset times */
40 uint_t samplerate; /**< sampling rate of the input signal */
41 uint_t hop_size; /**< number of samples between two runs */
43 uint_t total_frames; /**< total number of frames processed since the beginning */
44 uint_t last_onset; /**< last detected onset location, in frames */
47 /* execute onset detection function on iput buffer */
48 void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
51 aubio_pvoc_do (o->pv,input, o->fftgrain);
52 aubio_specdesc_do (o->od, o->fftgrain, o->desc);
53 aubio_peakpicker_do(o->pp, o->desc, onset);
54 isonset = onset->data[0];
56 if (aubio_silence_detection(input, o->silence)==1) {
57 //AUBIO_DBG ("silent onset, not marking as onset\n");
60 uint_t new_onset = o->total_frames + (uint_t)ROUND(isonset * o->hop_size);
61 if (o->last_onset + o->minioi < new_onset) {
62 //AUBIO_DBG ("accepted detection, marking as onset\n");
63 o->last_onset = new_onset;
65 //AUBIO_DBG ("doubled onset, not marking as onset\n");
70 // we are at the beginning of the file, and we don't find silence
71 if (o->total_frames == 0 && aubio_silence_detection(input, o->silence) == 0) {
72 //AUBIO_DBG ("beginning of file is not silent, marking as onset\n");
73 isonset = o->delay / o->hop_size;
74 o->last_onset = o->delay;
77 onset->data[0] = isonset;
78 o->total_frames += o->hop_size;
82 uint_t aubio_onset_get_last (aubio_onset_t *o)
84 return o->last_onset - o->delay;
87 smpl_t aubio_onset_get_last_s (aubio_onset_t *o)
89 return aubio_onset_get_last (o) / (smpl_t) (o->samplerate);
92 smpl_t aubio_onset_get_last_ms (aubio_onset_t *o)
94 return aubio_onset_get_last_s (o) * 1000.;
97 uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
102 uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
103 aubio_peakpicker_set_threshold(o->pp, threshold);
107 uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
112 uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
116 uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
117 return aubio_onset_set_minioi (o, minioi * o->samplerate);
120 smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
121 return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
124 uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
125 return aubio_onset_set_minioi_s (o, minioi / 1000.);
128 smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
129 return aubio_onset_get_minioi_s (o) * 1000.;
132 uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
137 uint_t aubio_onset_get_delay(aubio_onset_t * o) {
141 uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
142 return aubio_onset_set_delay (o, delay * o->samplerate);
145 smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
146 return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
149 uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
150 return aubio_onset_set_delay_s (o, delay / 1000.);
153 smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
154 return aubio_onset_get_delay_s (o) * 1000.;
157 smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
158 return o->desc->data[0];
161 smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
162 fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
163 return thresholded->data[0];
166 /* Allocate memory for an onset detection */
167 aubio_onset_t * new_aubio_onset (char_t * onset_mode,
168 uint_t buf_size, uint_t hop_size, uint_t samplerate)
170 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
171 /* store creation parameters */
172 o->samplerate = samplerate;
173 o->hop_size = hop_size;
175 /* allocate memory */
176 o->pv = new_aubio_pvoc(buf_size, o->hop_size);
177 o->pp = new_aubio_peakpicker();
178 o->od = new_aubio_specdesc(onset_mode,buf_size);
179 o->fftgrain = new_cvec(buf_size);
180 o->desc = new_fvec(1);
182 /* set some default parameter */
183 aubio_onset_set_threshold (o, 0.3);
184 aubio_onset_set_delay_ms(o, 50.);
185 aubio_onset_set_minioi_ms(o, 20.);
186 aubio_onset_set_silence(o, -70.);
188 /* initialize internal variables */
194 void del_aubio_onset (aubio_onset_t *o)
196 del_aubio_specdesc(o->od);
197 del_aubio_peakpicker(o->pp);
198 del_aubio_pvoc(o->pv);
200 del_cvec(o->fftgrain);