ref: 8a1f9a4f0ab95572bf1eb8f8b7b6de0ba23d077a
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*/