2 Copyright (C) 2006 Paul Brossier
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "aubio_priv.h"
22 #include "onsetdetection.h"
25 #include "mathutils.h"
28 /** structure to store object state */
29 struct _aubio_onset_t {
30 aubio_pvoc_t * pv; /**< phase vocoder */
31 aubio_onsetdetection_t * od; /**< onset detection */
32 aubio_pickpeak_t * pp; /**< peak picker */
33 cvec_t * fftgrain; /**< phase vocoder output */
34 fvec_t * of; /**< onset detection function */
35 smpl_t threshold; /**< onset peak picking threshold */
36 smpl_t silence; /**< silence threhsold */
37 uint_t minioi; /**< minimum inter onset interval */
38 uint_t wasonset; /**< number of frames since last onset */
41 /* execute onset detection function on iput buffer */
42 void aubio_onset(aubio_onset_t *o, fvec_t * input, fvec_t * onset)
45 uint_t wasonset = o->wasonset;
46 aubio_pvoc_do (o->pv,input, o->fftgrain);
47 aubio_onsetdetection(o->od,o->fftgrain, o->of);
49 aubio_onsetdetection(o2,fftgrain, onset2);
50 onset->data[0][0] *= onset2->data[0][0];
52 isonset = aubio_peakpick_pimrt(o->of,o->pp);
54 if (aubio_silence_detection(input, o->silence)==1) {
58 if (wasonset > o->minioi) {
68 o->wasonset = wasonset;
69 onset->data[0][0] = isonset;
73 void aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
78 void aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
79 o->threshold = threshold;
80 aubio_peakpicker_set_threshold(o->pp, o->threshold);
84 void aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
89 /* Allocate memory for an onset detection */
90 aubio_onset_t * new_aubio_onset (aubio_onsetdetection_type type_onset,
91 uint_t buf_size, uint_t hop_size, uint_t channels)
93 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
94 /** set some default parameter */
99 o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
100 o->pp = new_aubio_peakpicker(o->threshold);
101 o->od = new_aubio_onsetdetection(type_onset,buf_size,channels);
102 o->fftgrain = new_cvec(buf_size,channels);
103 o->of = new_fvec(1, channels);
105 o2 = new_aubio_onsetdetection(type_onset2,buffer_size,channels);
106 onset2 = new_fvec(1 , channels);
111 void del_aubio_onset (aubio_onset_t *o)
113 del_aubio_onsetdetection(o->od);
114 del_aubio_peakpicker(o->pp);
115 del_aubio_pvoc(o->pv);
117 del_cvec(o->fftgrain);