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/*
Copyright (C) 2003-2013 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
\example pitch/test-pitchfcomb.c
*/
#ifndef AUBIO_PITCHFCOMB_H
#define AUBIO_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, const fvec_t * input,
fvec_t * output);
/** creation of the pitch detection object
\param buf_size size of the input buffer to analyse
\param hop_size step size between two consecutive analysis instant
*/
aubio_pitchfcomb_t *new_aubio_pitchfcomb (uint_t buf_size, uint_t hop_size);
/** 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 /* AUBIO_PITCHFCOMB_H */
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