ref: c03e7777e63a0202d21f99fa08039ac65f8c581f
dir: /src/pitch/pitchfcomb.h/
/*
Copyright (C) 2003-2009 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/>.
*/
/** \file
Pitch detection using a fast harmonic comb filter
This pitch extraction method implements a fast harmonic comb filter to
determine the fundamental frequency of a harmonic sound.
This file was derived from the tuneit project, written by Mario Lang to
detect the fundamental frequency of a sound.
see http://delysid.org/tuneit.html
*/
#ifndef _PITCHFCOMB_H
#define _PITCHFCOMB_H
#ifdef __cplusplus
extern "C" {
#endif
/** pitch detection object */
typedef struct _aubio_pitchfcomb_t aubio_pitchfcomb_t;
/** execute pitch detection on an input buffer
\param p pitch detection object as returned by new_aubio_pitchfcomb
\param input input signal window (length as specified at creation time)
\param output pitch candidates in bins
*/
void aubio_pitchfcomb_do (aubio_pitchfcomb_t * p, fvec_t * input,
fvec_t * output);
/** creation of the pitch detection object
\param bufsize size of the input buffer to analyse
\param hopsize step size between two consecutive analysis instant
\param channels number of channels to detect pitch on
*/
aubio_pitchfcomb_t *new_aubio_pitchfcomb (uint_t bufsize, uint_t hopsize,
uint_t channels);
/** deletion of the pitch detection object
\param p pitch detection object as returned by new_aubio_pitchfcomb
*/
void del_aubio_pitchfcomb (aubio_pitchfcomb_t * p);
#ifdef __cplusplus
}
#endif
#endif /* _PITCHFCOMB_H */