| 1 | /* |
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| 2 | Copyright (C) 2003-2009 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 | Transient / Steady-state Separation (TSS) |
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| 24 | |
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| 25 | This file implement a Transient / Steady-state Separation (TSS) as described |
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| 26 | in: |
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| 27 | |
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| 28 | Christopher Duxbury, Mike E. Davies, and Mark B. Sandler. Separation of |
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| 29 | transient information in musical audio using multiresolution analysis |
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| 30 | techniques. In Proceedings of the Digital Audio Effects Conference, DAFx-01, |
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| 31 | pages 1--5, Limerick, Ireland, 2001. |
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| 32 | |
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| 33 | Available at http://www.csis.ul.ie/dafx01/proceedings/papers/duxbury.pdf |
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| 34 | |
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| 35 | */ |
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| 36 | |
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| 37 | #ifndef TSS_H |
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| 38 | #define TSS_H |
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| 39 | |
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| 40 | #ifdef __cplusplus |
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| 41 | extern "C" { |
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| 42 | #endif |
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| 43 | |
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| 44 | /** Transient / Steady-state Separation object */ |
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| 45 | typedef struct _aubio_tss_t aubio_tss_t; |
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| 46 | |
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| 47 | /** create tss object |
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| 48 | |
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| 49 | \param win_s buffer size |
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| 50 | \param hop_s step size |
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| 51 | \param channels number of input channels |
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| 52 | |
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| 53 | */ |
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| 54 | aubio_tss_t *new_aubio_tss (uint_t win_s, uint_t hop_s, uint_t channels); |
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| 55 | |
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| 56 | /** delete tss object |
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| 57 | |
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| 58 | \param o tss object as returned by new_aubio_tss() |
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| 59 | |
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| 60 | */ |
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| 61 | void del_aubio_tss (aubio_tss_t * o); |
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| 62 | |
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| 63 | /** split input into transient and steady states components |
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| 64 | |
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| 65 | \param o tss object as returned by new_aubio_tss() |
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| 66 | \param input input spectral frame |
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| 67 | \param trans output transient components |
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| 68 | \param stead output steady state components |
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| 69 | |
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| 70 | */ |
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| 71 | void aubio_tss_do (aubio_tss_t * o, cvec_t * input, cvec_t * trans, |
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| 72 | cvec_t * stead); |
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| 73 | |
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| 74 | /** set transient / steady state separation threshold |
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| 75 | |
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| 76 | \param o tss object as returned by new_aubio_tss() |
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| 77 | \param thrs new threshold value |
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| 78 | |
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| 79 | */ |
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| 80 | uint_t aubio_tss_set_threshold (aubio_tss_t * o, smpl_t thrs); |
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| 81 | |
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| 82 | /** set parameter a, defaults to 3 |
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| 83 | |
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| 84 | \param o tss object as returned by new_aubio_tss() |
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| 85 | \param alpha new value for alpha parameter |
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| 86 | |
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| 87 | */ |
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| 88 | uint_t aubio_tss_set_alpha (aubio_tss_t * o, smpl_t alpha); |
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| 89 | |
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| 90 | /** set parameter b, defaults to 3 |
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| 91 | |
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| 92 | \param o tss object as returned by new_aubio_tss() |
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| 93 | \param beta new value for beta parameter |
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| 94 | |
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| 95 | */ |
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| 96 | uint_t aubio_tss_set_beta (aubio_tss_t * o, smpl_t beta); |
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| 97 | |
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| 98 | #ifdef __cplusplus |
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| 99 | } |
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| 100 | #endif |
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| 101 | |
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| 102 | #endif /*TSS_H*/ |
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