ref: f5e0a54442912496c3796085820a74451ab89bf1
dir: /src/onset/onset.c/
/*
Copyright (C) 2006-2009 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
aubio is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#include "aubio_priv.h"
#include "fvec.h"
#include "cvec.h"
#include "spectral/specdesc.h"
#include "spectral/phasevoc.h"
#include "onset/peakpicker.h"
#include "mathutils.h"
#include "onset/onset.h"
/** structure to store object state */
struct _aubio_onset_t {
aubio_pvoc_t * pv; /**< phase vocoder */
aubio_specdesc_t * od; /**< onset description function */
aubio_peakpicker_t * pp; /**< peak picker */
cvec_t * fftgrain; /**< phase vocoder output */
fvec_t * of; /**< onset detection function */
smpl_t threshold; /**< onset peak picking threshold */
smpl_t silence; /**< silence threhsold */
uint_t minioi; /**< minimum inter onset interval */
uint_t delay; /**< constant delay, in samples, removed from detected onset times */
fvec_t * wasonset; /**< number of blocks since last onset */
uint_t samplerate; /**< sampling rate of the input signal */
uint_t hop_size; /**< number of samples between two runs */
uint_t total_frames; /**< total number of frames processed since the beginning */
uint_t last_onset; /**< last detected onset location, in frames */
};
/* execute onset detection function on iput buffer */
void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
{
smpl_t isonset = 0;
smpl_t wasonset = 0;
aubio_pvoc_do (o->pv,input, o->fftgrain);
aubio_specdesc_do (o->od,o->fftgrain, o->of);
aubio_peakpicker_do(o->pp, o->of, onset);
isonset = onset->data[0];
wasonset = o->wasonset->data[0];
if (isonset > 0.) {
if (aubio_silence_detection(input, o->silence)==1) {
isonset = 0;
wasonset++;
} else {
if (wasonset > o->minioi) {
wasonset = 0;
o->last_onset = o->total_frames + isonset * o->hop_size;
} else {
isonset = 0;
wasonset++;
}
}
} else {
if (wasonset == -1 && aubio_silence_detection(input, o->silence) == 0) {
//AUBIO_MSG("beginning of file is not silent, marking as onset\n",
// wasonset, aubio_silence_detection(input, o->silence));
isonset = o->delay / o->hop_size;
o->last_onset = o->delay;
wasonset = 0;
}
wasonset++;
}
o->wasonset->data[0] = wasonset;
//onset->data[0] = isonset * o->hop_size - o->delay;
onset->data[0] = isonset;
// also keep a copy of the offset for use in get_last_onset
o->total_frames += o->hop_size;
return;
}
smpl_t aubio_onset_get_last_onset (aubio_onset_t *o)
{
return o->last_onset - o->delay;
}
smpl_t aubio_onset_get_last_onset_s (aubio_onset_t *o)
{
return aubio_onset_get_last_onset (o) / (smpl_t) (o->samplerate);
}
smpl_t aubio_onset_get_last_onset_ms (aubio_onset_t *o)
{
return aubio_onset_get_last_onset_s (o) / 1000.;
}
smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
return o->of->data[0];
}
smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
return thresholded->data[0];
}
uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
o->silence = silence;
return AUBIO_OK;
}
uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
o->threshold = threshold;
aubio_peakpicker_set_threshold(o->pp, o->threshold);
return AUBIO_OK;
}
uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
o->minioi = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
return AUBIO_OK;
}
uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
return o->minioi;
}
uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
o->delay = delay;
return AUBIO_OK;
}
uint_t aubio_onset_get_delay(aubio_onset_t * o) {
return o->delay;
}
uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
return aubio_onset_set_delay (o, delay * o->samplerate);
}
smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
}
uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
return aubio_onset_set_delay_s (o, delay / 1000.);
}
smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
return aubio_onset_get_delay_s (o) * 1000.;
}
/* Allocate memory for an onset detection */
aubio_onset_t * new_aubio_onset (char_t * onset_mode,
uint_t buf_size, uint_t hop_size, uint_t samplerate)
{
aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
/** set some default parameter */
o->last_onset = 0;
o->threshold = 0.3;
o->delay = 4.3 * hop_size;
o->minioi = 5;
o->silence = -70;
o->wasonset = new_fvec(1);
o->wasonset->data[0] = -1.;
o->total_frames = 0;
o->samplerate = samplerate;
o->hop_size = hop_size;
o->pv = new_aubio_pvoc(buf_size, hop_size);
o->pp = new_aubio_peakpicker();
aubio_peakpicker_set_threshold (o->pp, o->threshold);
o->od = new_aubio_specdesc(onset_mode,buf_size);
o->fftgrain = new_cvec(buf_size);
o->of = new_fvec(1);
/*if (usedoubled) {
o2 = new_aubio_specdesc(onset_type2,buffer_size);
onset2 = new_fvec(1);
}*/
return o;
}
void del_aubio_onset (aubio_onset_t *o)
{
del_aubio_specdesc(o->od);
del_aubio_peakpicker(o->pp);
del_aubio_pvoc(o->pv);
del_fvec(o->of);
del_fvec(o->wasonset);
del_cvec(o->fftgrain);
AUBIO_FREE(o);
}