source: src/pitch/pitchmcomb.h @ 1111de1

/*
  Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org>

  This file is part of aubio.

  aubio 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 3 of the License, or
  (at your option) any later version.

  aubio 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 aubio.  If not, see <http://www.gnu.org/licenses/>.

*/

/** \file

  Pitch detection using multiple-comb filter

  This fundamental frequency estimation algorithm implements spectral
  flattening, multi-comb filtering and peak histogramming. 

  This method was designed by Juan P. Bello and described in:

  Juan-Pablo Bello. ``Towards the Automated Analysis of Simple Polyphonic
  Music''.  PhD thesis, Centre for Digital Music, Queen Mary University of
  London, London, UK, 2003.

*/

#ifndef PITCHMCOMB_H
#define PITCHMCOMB_H

#ifdef __cplusplus
extern "C" {
#endif

/** pitch detection object */
typedef struct _aubio_pitchmcomb_t aubio_pitchmcomb_t;

/** execute pitch detection on an input spectral frame
 
  \param p pitch detection object as returned by new_aubio_pitchmcomb
  \param fftgrain input signal spectrum as computed by aubio_pvoc_do 
 
*/
void aubio_pitchmcomb_do (aubio_pitchmcomb_t * p, cvec_t * fftgrain,
    fvec_t * output);

/** creation of the pitch detection object
 
  \param bufsize size of the input buffer to analyse 
  \param hopsize step size between two consecutive analysis instant 
  \param channels number of channels to analyse
  \param samplerate sampling rate of the signal 
 
*/
aubio_pitchmcomb_t *new_aubio_pitchmcomb (uint_t bufsize, uint_t hopsize,
    uint_t channels);

/** deletion of the pitch detection object
 
  \param p pitch detection object as returned by new_aubio_pitchfcomb
 
*/
void del_aubio_pitchmcomb (aubio_pitchmcomb_t * p);

#ifdef __cplusplus
}
#endif

#endif/*PITCHMCOMB_H*/