2 Copyright (C) 2006-2009 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; /**< 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 fvec_t * wasonset; /**< number of blocks since last onset */
42 uint_t samplerate; /**< sampling rate of the input signal */
43 uint_t hop_size; /**< number of samples between two runs */
45 uint_t total_frames; /**< total number of frames processed since the beginning */
46 uint_t last_onset; /**< last detected onset location, in frames */
49 /* execute onset detection function on iput buffer */
50 void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
54 aubio_pvoc_do (o->pv,input, o->fftgrain);
55 aubio_specdesc_do (o->od,o->fftgrain, o->of);
56 aubio_peakpicker_do(o->pp, o->of, onset);
57 isonset = onset->data[0];
58 wasonset = o->wasonset->data[0];
60 if (aubio_silence_detection(input, o->silence)==1) {
64 if (wasonset > o->minioi) {
66 o->last_onset = o->total_frames + isonset * o->hop_size;
73 if (wasonset == -1 && aubio_silence_detection(input, o->silence) == 0) {
74 //AUBIO_MSG("beginning of file is not silent, marking as onset\n",
75 // wasonset, aubio_silence_detection(input, o->silence));
76 isonset = o->delay / o->hop_size;
77 o->last_onset = o->delay;
82 o->wasonset->data[0] = wasonset;
83 //onset->data[0] = isonset * o->hop_size - o->delay;
84 onset->data[0] = isonset;
85 // also keep a copy of the offset for use in get_last_onset
86 o->total_frames += o->hop_size;
90 smpl_t aubio_onset_get_last_onset (aubio_onset_t *o)
92 return o->last_onset - o->delay;
95 smpl_t aubio_onset_get_last_onset_s (aubio_onset_t *o)
97 return aubio_onset_get_last_onset (o) / (smpl_t) (o->samplerate);
100 smpl_t aubio_onset_get_last_onset_ms (aubio_onset_t *o)
102 return aubio_onset_get_last_onset_s (o) / 1000.;
105 smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
106 return o->of->data[0];
109 smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
110 fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
111 return thresholded->data[0];
114 uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
115 o->silence = silence;
119 uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
120 o->threshold = threshold;
121 aubio_peakpicker_set_threshold(o->pp, o->threshold);
125 uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
126 o->minioi = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
130 uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
134 uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
139 uint_t aubio_onset_get_delay(aubio_onset_t * o) {
143 uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
144 return aubio_onset_set_delay (o, delay * o->samplerate);
147 smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
148 return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
151 uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
152 return aubio_onset_set_delay_s (o, delay / 1000.);
155 smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
156 return aubio_onset_get_delay_s (o) * 1000.;
159 /* Allocate memory for an onset detection */
160 aubio_onset_t * new_aubio_onset (char_t * onset_mode,
161 uint_t buf_size, uint_t hop_size, uint_t samplerate)
163 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
164 /** set some default parameter */
167 o->delay = 4.3 * hop_size;
170 o->wasonset = new_fvec(1);
171 o->wasonset->data[0] = -1.;
173 o->samplerate = samplerate;
174 o->hop_size = hop_size;
175 o->pv = new_aubio_pvoc(buf_size, hop_size);
176 o->pp = new_aubio_peakpicker();
177 aubio_peakpicker_set_threshold (o->pp, o->threshold);
178 o->od = new_aubio_specdesc(onset_mode,buf_size);
179 o->fftgrain = new_cvec(buf_size);
182 o2 = new_aubio_specdesc(onset_type2,buffer_size);
183 onset2 = new_fvec(1);
188 void del_aubio_onset (aubio_onset_t *o)
190 del_aubio_specdesc(o->od);
191 del_aubio_peakpicker(o->pp);
192 del_aubio_pvoc(o->pv);
194 del_fvec(o->wasonset);
195 del_cvec(o->fftgrain);