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/peakpick.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 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 */
45 /* execute onset detection function on iput buffer */
46 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->of);
54 aubio_specdesc_do (o2,fftgrain, onset2);
55 onset->data[0][0] *= onset2->data[0][0];
57 aubio_peakpicker_do(o->pp, o->of, onset);
58 for (i = 0; i < input->channels; i++) {
59 isonset = onset->data[i][0];
60 wasonset = o->wasonset->data[i][0];
62 if (aubio_silence_detection(input, o->silence)==1) {
66 if (wasonset > o->minioi) {
76 o->wasonset->data[i][0] = wasonset;
77 onset->data[i][0] = isonset;
82 uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
87 uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
88 o->threshold = threshold;
89 aubio_peakpicker_set_threshold(o->pp, o->threshold);
93 uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
94 o->minioi = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
98 /* Allocate memory for an onset detection */
99 aubio_onset_t * new_aubio_onset (char_t * onset_mode,
100 uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate)
102 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
103 /** set some default parameter */
107 o->wasonset = new_fvec(1, channels);
108 o->samplerate = samplerate;
109 o->hop_size = hop_size;
110 o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
111 o->pp = new_aubio_peakpicker(channels);
112 aubio_peakpicker_set_threshold (o->pp, o->threshold);
113 o->od = new_aubio_specdesc(onset_mode,buf_size,channels);
114 o->fftgrain = new_cvec(buf_size,channels);
115 o->of = new_fvec(1, channels);
117 o2 = new_aubio_specdesc(onset_type2,buffer_size,channels);
118 onset2 = new_fvec(1 , channels);
123 void del_aubio_onset (aubio_onset_t *o)
125 del_aubio_specdesc(o->od);
126 del_aubio_peakpicker(o->pp);
127 del_aubio_pvoc(o->pv);
129 del_fvec(o->wasonset);
130 del_cvec(o->fftgrain);