ref: 874ed554c0c2e670e329ac34691614d7a8710454
dir: /src/pitch/pitchyin.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 the YIN algorithm This algorithm was developped by A. de Cheveigne and H. Kawahara and published in: De Cheveigné, A., Kawahara, H. (2002) "YIN, a fundamental frequency estimator for speech and music", J. Acoust. Soc. Am. 111, 1917-1930. see http://recherche.ircam.fr/equipes/pcm/pub/people/cheveign.html */ #ifndef PITCHYIN_H #define PITCHYIN_H #ifdef __cplusplus extern "C" { #endif /** compute difference function \param input input signal \param yinbuf output buffer to store difference function (half shorter than input) */ void aubio_pitchyin_diff(fvec_t * input, fvec_t * yinbuf); /** in place computation of the YIN cumulative normalised function \param yinbuf input signal (a square difference function), also used to store function */ void aubio_pitchyin_getcum(fvec_t * yinbuf); /** detect pitch in a YIN function \param yinbuf input buffer as computed by aubio_pitchyin_getcum */ uint_t aubio_pitchyin_getpitch(fvec_t *yinbuf); /** fast implementation of the YIN algorithm \param input input signal \param yinbuf input buffer used to compute the YIN function \param tol tolerance parameter for minima selection [default 0.15] */ smpl_t aubio_pitchyin_getpitchfast(fvec_t * input, fvec_t *yinbuf, smpl_t tol); #ifdef __cplusplus } #endif #endif /*PITCHYIN_H*/