ref: 2a109e4ee1f09fe440cd0b776134440ad9dcd6bc
dir: /src/tempo/beattracking.h/
/* Copyright (C) 2003-2009 Matthew Davies and 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 Beat tracking using a context dependant model This file implements 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 hop_size number of onset detection samples [512] */ aubio_beattracking_t * new_aubio_beattracking(uint_t hop_size); /** 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); /** get current tempo in bpm \param bt beat tracking object Returns the currently observed tempo, in beats per minutes, or 0 if no consistent value is found. */ smpl_t aubio_beattracking_get_bpm(aubio_beattracking_t * bt); /** get current tempo confidence \param bt beat tracking object Returns the confidence with which the tempo has been observed, 0 if no consistent value is found. */ smpl_t aubio_beattracking_get_confidence(aubio_beattracking_t * bt); /** delete beat tracking object \param p beat tracking object */ void del_aubio_beattracking(aubio_beattracking_t * p); #ifdef __cplusplus } #endif #endif /* BEATTRACKING_H */