ref: 202ffa5544e0d271747c004cb46f33c1c2a78bed
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_do 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_do 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_do (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 */