ref: e8dd49f4c73e9a11c9163c8b77fdd9ff7a7cb900
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 detection */ 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 */ fvec_t * wasonset; /**< number of frames since last onset */ uint_t samplerate; /**< sampling rate of the input signal */ uint_t hop_size; /**< number of samples between two runs */ }; /* 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; } else { isonset = 0; wasonset++; } } } else { wasonset++; } o->wasonset->data[0] = wasonset; onset->data[0] = isonset; return; } 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; } /* 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->threshold = 0.3; o->minioi = 4; o->silence = -70; o->wasonset = new_fvec(1); 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); }