ref: 4b6937b60f42819270033ab16d7949ac507461a0
dir: /src/pitchyinfft.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
Pitch detection using a spectral implementation of the YIN algorithm
This algorithm was derived from the YIN algorithm (see pitchyin.c). In this
implementation, a Fourier transform is used to compute a tapered square
difference function, which allows spectral weighting. Because the difference
function is tapered, the selection of the period is simplified.
Paul Brossier, ``Automatic annotation of musical audio for interactive
systems'', Chapter 3, Pitch Analysis, PhD thesis, Centre for Digital music,
Queen Mary University of London, London, UK, 2006.
*/
#ifndef PITCHYINFFT_H
#define PITCHYINFFT_H
#ifdef __cplusplus
extern "C" {
#endif
/** pitch detection object */
typedef struct _aubio_pitchyinfft_t aubio_pitchyinfft_t;
/** execute pitch detection on an input buffer
\param p pitch detection object as returned by new_aubio_pitchyinfft
\param input input signal window (length as specified at creation time)
\param tol tolerance parameter for minima selection [default 0.85]
*/
smpl_t aubio_pitchyinfft_detect (aubio_pitchyinfft_t *p, fvec_t * input, smpl_t tol);
/** creation of the pitch detection object
\param bufsize size of the input buffer to analyse
*/
aubio_pitchyinfft_t * new_aubio_pitchyinfft (uint_t bufsize);
/** deletion of the pitch detection object
\param p pitch detection object as returned by new_aubio_pitchyinfft()
*/
void del_aubio_pitchyinfft (aubio_pitchyinfft_t *p);
#ifdef __cplusplus
}
#endif
#endif /*PITCHYINFFT_H*/