ref: fed94339e2b61f175b12cb8e350ec8f4565a3489
dir: /src/onset/onset.h/
/* Copyright (C) 2006 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 driver The following routines compute the onset detection function and detect peaks in these functions. When onsets are found above a given silence threshold, and after a minimum inter-onset interval, the output vector returned by aubio_onset is filled with 1. Otherwise, the output vector remains 0. The peak-picking threshold, the silence threshold, and the minimum inter-onset interval can be adjusted during the execution of the aubio_onset routine using the corresponding functions. */ #ifndef ONSET_H #define ONSET_H #ifdef __cplusplus extern "C" { #endif /** onset detection object */ typedef struct _aubio_onset_t aubio_onset_t; /** create onset detection object \param type_onset onset detection type as specified in onsetdetection.h \param buf_size buffer size for phase vocoder \param hop_size hop size for phase vocoder \param channels number of channels */ aubio_onset_t * new_aubio_onset (aubio_onsetdetection_type type_onset, uint_t buf_size, uint_t hop_size, uint_t channels); /** execute onset detection \param o onset detection object as returned by new_aubio_onset \param input new audio vector of length hop_size \param onset output vector, 1 if onset is found, 0 otherwise */ void aubio_onset(aubio_onset_t *o, fvec_t * input, fvec_t * onset); /** set onset detection silence threshold \param o onset detection object as returned by new_aubio_onset \param silence new silence detection threshold */ void aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence); /** set onset detection peak picking threshold \param o onset detection object as returned by new_aubio_onset \param threshold new peak-picking threshold */ void aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold); /** set minimum inter onset interval \param o onset detection object as returned by new_aubio_onset \param minioi minimum number of frames between onsets (in multiple of hop_size/samplerare) */ void aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi); /** delete onset detection object \param o onset detection object to delete */ void del_aubio_onset(aubio_onset_t * o); #ifdef __cplusplus } #endif #endif /* ONSET_H */