andrew@0: /*
andrew@0:    Copyright (C) 2003 Paul Brossier
andrew@0: 
andrew@0:    This program is free software; you can redistribute it and/or modify
andrew@0:    it under the terms of the GNU General Public License as published by
andrew@0:    the Free Software Foundation; either version 2 of the License, or
andrew@0:    (at your option) any later version.
andrew@0: 
andrew@0:    This program is distributed in the hope that it will be useful,
andrew@0:    but WITHOUT ANY WARRANTY; without even the implied warranty of
andrew@0:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrew@0:    GNU General Public License for more details.
andrew@0: 
andrew@0:    You should have received a copy of the GNU General Public License
andrew@0:    along with this program; if not, write to the Free Software
andrew@0:    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
andrew@0: */
andrew@0: 
andrew@0: /** \file
andrew@0:  
andrew@0:   Pitch detection using a spectral implementation of the YIN algorithm
andrew@0:   
andrew@0:   This algorithm was derived from the YIN algorithm (see pitchyin.c). In this
andrew@0:   implementation, a Fourier transform is used to compute a tapered square
andrew@0:   difference function, which allows spectral weighting. Because the difference
andrew@0:   function is tapered, the selection of the period is simplified.
andrew@0:  
andrew@0:   Paul Brossier, ``Automatic annotation of musical audio for interactive
andrew@0:   systems'', Chapter 3, Pitch Analysis, PhD thesis, Centre for Digital music,
andrew@0:   Queen Mary University of London, London, UK, 2006.
andrew@0: 
andrew@0: */
andrew@0: 
andrew@0: #ifndef PITCHYINFFT_H
andrew@0: #define PITCHYINFFT_H
andrew@0: 
andrew@0: #ifdef __cplusplus
andrew@0: extern "C" {
andrew@0: #endif
andrew@0: 
andrew@0: /** pitch detection object */
andrew@0: typedef struct _aubio_pitchyinfft_t aubio_pitchyinfft_t;
andrew@0: 
andrew@0: /** execute pitch detection on an input buffer 
andrew@0:  
andrew@0:   \param p pitch detection object as returned by new_aubio_pitchyinfft
andrew@0:   \param input input signal window (length as specified at creation time) 
andrew@0:   \param tol tolerance parameter for minima selection [default 0.85] 
andrew@0:  
andrew@0: */
andrew@0: smpl_t aubio_pitchyinfft_detect (aubio_pitchyinfft_t *p, fvec_t * input, smpl_t tol);
andrew@0: /** creation of the pitch detection object
andrew@0:  
andrew@0:   \param bufsize size of the input buffer to analyse 
andrew@0:  
andrew@0: */
andrew@0: aubio_pitchyinfft_t * new_aubio_pitchyinfft (ba_uint_t bufsize);
andrew@0: /** deletion of the pitch detection object
andrew@0:  
andrew@0:   \param p pitch detection object as returned by new_aubio_pitchyinfft()
andrew@0:  
andrew@0: */
andrew@0: void del_aubio_pitchyinfft (aubio_pitchyinfft_t *p);
andrew@0: 
andrew@0: #ifdef __cplusplus
andrew@0: }
andrew@0: #endif
andrew@0: 
andrew@0: #endif /*PITCHYINFFT_H*/