view libs/aubioFullOSXUni/include/aubio/beattracking.h @ 1:ba2a17cf81bf

first working version of audio file loder. Loads bach clip from the apps->audio-file-loader->bin->data->sounds foler. Three classes: SoundFileLoader does the loading and parsing of thefile with libSndFile. audio samples are kept in AudioFile and analysis of features are kept in AudioAnalysis, at this stage just chromagramm and basic energy

/*
  Copyright (C) 2003 Matthew Davies and 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

  Beat tracking using a context dependant model

  This file implement the causal beat tracking algorithm designed by Matthew
  Davies and described in the following articles:

  Matthew E. P. Davies and Mark D. Plumbley. Causal tempo tracking of audio.
  In Proceedings of the International Symposium on Music Information Retrieval
  (ISMIR), pages 164­169, Barcelona, Spain, 2004.

  Matthew E. P. Davies, Paul Brossier, and Mark D. Plumbley. Beat tracking
  towards automatic musical accompaniment. In Proceedings of the Audio
  Engeeniring Society 118th Convention, Barcelona, Spain, May 2005.
  
*/
#ifndef BEATTRACKING_H
#define BEATTRACKING_H

#ifdef __cplusplus
extern "C" {
#endif

/** beat tracking object */
typedef struct _aubio_beattracking_t aubio_beattracking_t;

/** create beat tracking object

  \param winlen: frame size [512] 
  \param channels number (not functionnal) [1]

*/
aubio_beattracking_t * new_aubio_beattracking(ba_uint_t winlen, ba_uint_t channels);
/** track the beat 

  \param bt beat tracking object
  \param dfframes current input detection function frame, smoothed by
  adaptive median threshold. 
  \param out stored detected beat locations 

*/
void aubio_beattracking_do(aubio_beattracking_t * bt, fvec_t * dfframes, fvec_t * out);
/** delete beat tracking object

  \param p beat tracking object

*/
void del_aubio_beattracking(aubio_beattracking_t * p);

#ifdef __cplusplus
}
#endif

#endif /* BEATTRACKING_H */