andrew@0: /*
andrew@0:   Copyright (C) 2003 Matthew Davies and 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: 
andrew@0: /** \file
andrew@0: 
andrew@0:   Beat tracking using a context dependant model
andrew@0: 
andrew@0:   This file implement the causal beat tracking algorithm designed by Matthew
andrew@0:   Davies and described in the following articles:
andrew@0: 
andrew@0:   Matthew E. P. Davies and Mark D. Plumbley. Causal tempo tracking of audio.
andrew@0:   In Proceedings of the International Symposium on Music Information Retrieval
andrew@0:   (ISMIR), pages 164­169, Barcelona, Spain, 2004.
andrew@0: 
andrew@0:   Matthew E. P. Davies, Paul Brossier, and Mark D. Plumbley. Beat tracking
andrew@0:   towards automatic musical accompaniment. In Proceedings of the Audio
andrew@0:   Engeeniring Society 118th Convention, Barcelona, Spain, May 2005.
andrew@0:   
andrew@0: */
andrew@0: #ifndef BEATTRACKING_H
andrew@0: #define BEATTRACKING_H
andrew@0: 
andrew@0: #ifdef __cplusplus
andrew@0: extern "C" {
andrew@0: #endif
andrew@0: 
andrew@0: /** beat tracking object */
andrew@0: typedef struct _aubio_beattracking_t aubio_beattracking_t;
andrew@0: 
andrew@0: /** create beat tracking object
andrew@0: 
andrew@0:   \param winlen: frame size [512] 
andrew@0:   \param channels number (not functionnal) [1]
andrew@0: 
andrew@0: */
andrew@0: aubio_beattracking_t * new_aubio_beattracking(ba_uint_t winlen, ba_uint_t channels);
andrew@0: /** track the beat 
andrew@0: 
andrew@0:   \param bt beat tracking object
andrew@0:   \param dfframes current input detection function frame, smoothed by
andrew@0:   adaptive median threshold. 
andrew@0:   \param out stored detected beat locations 
andrew@0: 
andrew@0: */
andrew@0: void aubio_beattracking_do(aubio_beattracking_t * bt, fvec_t * dfframes, fvec_t * out);
andrew@0: /** delete beat tracking object
andrew@0: 
andrew@0:   \param p beat tracking object
andrew@0: 
andrew@0: */
andrew@0: void del_aubio_beattracking(aubio_beattracking_t * p);
andrew@0: 
andrew@0: #ifdef __cplusplus
andrew@0: }
andrew@0: #endif
andrew@0: 
andrew@0: #endif /* BEATTRACKING_H */