| 1 | /* |
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| 2 | Copyright (C) 2006-2009 Paul Brossier <piem@aubio.org> |
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| 3 | |
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| 4 | This file is part of aubio. |
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| 5 | |
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| 6 | aubio is free software: you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation, either version 3 of the License, or |
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| 9 | (at your option) any later version. |
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| 10 | |
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| 11 | aubio is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with aubio. If not, see <http://www.gnu.org/licenses/>. |
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| 18 | |
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| 19 | */ |
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| 20 | |
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| 21 | /** \file |
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| 22 | |
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| 23 | Tempo detection driver |
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| 24 | |
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| 25 | This object stores all the memory required for tempo detection algorithm |
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| 26 | and returns the estimated beat locations. |
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| 27 | |
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| 28 | */ |
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| 29 | |
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| 30 | #ifndef TEMPO_H |
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| 31 | #define TEMPO_H |
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| 32 | |
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| 33 | #ifdef __cplusplus |
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| 34 | extern "C" { |
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| 35 | #endif |
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| 36 | |
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| 37 | /** tempo detection structure */ |
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| 38 | typedef struct _aubio_tempo_t aubio_tempo_t; |
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| 39 | |
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| 40 | /** create tempo detection object */ |
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| 41 | aubio_tempo_t * new_aubio_tempo (char_t * method, |
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| 42 | uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate); |
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| 43 | |
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| 44 | /** execute tempo detection */ |
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| 45 | void aubio_tempo_do (aubio_tempo_t *o, fvec_t * input, fvec_t * tempo); |
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| 46 | |
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| 47 | /** set tempo detection silence threshold */ |
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| 48 | uint_t aubio_tempo_set_silence(aubio_tempo_t * o, smpl_t silence); |
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| 49 | |
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| 50 | /** set tempo detection peak picking threshold */ |
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| 51 | uint_t aubio_tempo_set_threshold(aubio_tempo_t * o, smpl_t threshold); |
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| 52 | |
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| 53 | /** get current tempo |
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| 54 | |
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| 55 | \param bt beat tracking object |
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| 56 | |
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| 57 | Returns the currently observed tempo, or 0 if no consistent value is found |
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| 58 | |
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| 59 | */ |
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| 60 | smpl_t aubio_tempo_get_bpm(aubio_tempo_t * bt); |
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| 61 | |
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| 62 | /** get current tempo confidence |
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| 63 | |
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| 64 | \param bt beat tracking object |
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| 65 | |
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| 66 | Returns the confidence with which the tempo has been observed, 0 if no |
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| 67 | consistent value is found. |
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| 68 | |
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| 69 | */ |
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| 70 | smpl_t aubio_tempo_get_confidence(aubio_tempo_t * bt); |
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| 71 | |
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| 72 | /** delete tempo detection object */ |
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| 73 | void del_aubio_tempo(aubio_tempo_t * o); |
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| 74 | |
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| 75 | #ifdef __cplusplus |
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| 76 | } |
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| 77 | #endif |
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| 78 | |
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| 79 | #endif /* TEMPO_H */ |
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