ref: ead2920de5e2d9665ab79239b2103062785fdf8f
dir: /src/pitchdetection.c/
/* Copyright (C) 2003 Paul Brossier This program 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 2 of the License, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "aubio_priv.h" #include "sample.h" #include "phasevoc.h" #include "mathutils.h" #include "filter.h" #include "pitchyin.h" #include "pitchmcomb.h" #include "pitchdetection.h" struct _aubio_pitchdetection_t { aubio_pitchdetection_type type; aubio_pitchdetection_mode mode; uint_t srate; uint_t bufsize; /* for mcomb */ aubio_pvoc_t * pv; cvec_t * fftgrain; aubio_pitchmcomb_t * mcomb; aubio_filter_t * filter; /* for yin */ fvec_t * buf; fvec_t * yin; }; aubio_pitchdetection_t * new_aubio_pitchdetection(uint_t bufsize, uint_t hopsize, uint_t channels, uint_t samplerate, aubio_pitchdetection_type type, aubio_pitchdetection_mode mode) { aubio_pitchdetection_t *p = AUBIO_NEW(aubio_pitchdetection_t); p->srate = samplerate; p->type = type; p->bufsize = bufsize; switch(p->type) { case aubio_yin: p->buf = new_fvec(bufsize,channels); p->yin = new_fvec(bufsize/2,channels); break; case aubio_mcomb: p->pv = new_aubio_pvoc(bufsize, hopsize, channels); p->fftgrain = new_cvec(bufsize, channels); p->filter = new_aubio_adsgn_filter((smpl_t)samplerate); p->mcomb = new_aubio_pitchmcomb(bufsize,channels); break; default: break; } return p; } void del_aubio_pitchdetection(aubio_pitchdetection_t * p) { switch(p->type) { case aubio_yin: del_fvec(p->yin); del_fvec(p->buf); break; case aubio_mcomb: del_aubio_pvoc(p->pv); del_cvec(p->fftgrain); //del_aubio_adsgn_filter(p->filter); //del_aubio_pitchmcomb(p->mcomb); break; default: break; } AUBIO_FREE(p); } /** \bug ugly, should replace with function pointers or so */ smpl_t aubio_pitchdetection(aubio_pitchdetection_t *p, fvec_t * ibuf) { smpl_t pitch = 0.; uint_t i,j = 0, overlap_size = 0; switch(p->type) { case aubio_yin: overlap_size = p->buf->length-ibuf->length; /* do sliding window blocking */ for (i=0;i<p->buf->channels;i++){ for (j=0;j<overlap_size;j++){ p->buf->data[i][j] = p->buf->data[i][j+ibuf->length]; } } for (i=0;i<ibuf->channels;i++){ for (j=0;j<ibuf->length;j++){ p->buf->data[i][j+overlap_size] = ibuf->data[i][j]; } } pitch = aubio_pitchyin_getpitchfast(p->buf,p->yin, 0.5); if (pitch>0) { pitch = p->srate/(pitch+0.); } else { pitch = 0.; } break; case aubio_mcomb: aubio_filter_do(p->filter,ibuf); aubio_filter_do(p->filter,ibuf); aubio_pvoc_do(p->pv,ibuf,p->fftgrain); pitch = aubio_pitchmcomb_detect(p->mcomb,p->fftgrain); if (pitch>0.) { pitch = bintofreq(pitch,p->srate,p->bufsize); } else { pitch = 0.; } break; default: break; } return pitch; }