view aubioFullOSXUni/include/aubio/pitchyinfft.h @ 0:572c856e38ac

Starting up openFrameworks project for audio time warping. The ofxFileReader goes in addons of your OF folder, the libraries and source (chromogram, fftw and source code src+ timewarp) are probably best kept in the repository, then dragged into the project afresh. That way, as we update the repository, the code that the openFrameworks project looks for will be updated.

/*
   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 (ba_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*/