ref: 3ca6155cc22a95ab99f90f30bbfd7a425b4a0493
dir: /src/onset/onsetdetection.h/
/* 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. */ /** \file Onset detection functions All of the following onset detection function take as arguments the FFT of a windowed signal (as created with aubio_pvoc). They output one smpl_t per buffer and per channel (stored in a vector of size [channels]x[1]). These functions were first adapted from Juan Pablo Bello's code, and now include further improvements and modifications made within aubio. */ #ifndef ONSETDETECTION_H #define ONSETDETECTION_H #ifdef __cplusplus extern "C" { #endif /** onsetdetection structure */ typedef struct _aubio_onsetdetection_t aubio_onsetdetection_t; /** execute onset detection function on a spectral frame Generic function to compute onset detection. \param o onset detection object as returned by new_aubio_onsetdetection() \param fftgrain input signal spectrum as computed by aubio_pvoc_do \param onset output vector (one sample long, to send to the peak picking) */ void aubio_onsetdetection_do (aubio_onsetdetection_t *o, cvec_t * fftgrain, fvec_t * onset); /** creation of an onset detection object \param type onset detection mode \param size length of the input spectrum frame \param channels number of input channels */ aubio_onsetdetection_t * new_aubio_onsetdetection(char_t * onset_mode, uint_t buf_size, uint_t channels); /** deletion of an onset detection object \param o onset detection object as returned by new_aubio_onsetdetection() */ void del_aubio_onsetdetection(aubio_onsetdetection_t *o); #ifdef __cplusplus } #endif #endif /* ONSETDETECTION_H */