ref: 44755a05e0b7e7d2940ea2ea9d5d74b1ba51350e
dir: /src/spectral/filterbank.h/
/* Copyright (C) 2007-2013 Paul Brossier <piem@aubio.org> and Amaury Hazan <ahazan@iua.upf.edu> 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 Filterbank object General-purpose spectral filterbank object. \example spectral/test-filterbank.c */ #ifndef _AUBIO_FILTERBANK_H #define _AUBIO_FILTERBANK_H #ifdef __cplusplus extern "C" { #endif /** filterbank object This object stores a matrix of spectral filter coefficients. */ typedef struct _aubio_filterbank_t aubio_filterbank_t; /** create filterbank object \param n_filters number of filters to create \param win_s size of analysis buffer (and length the FFT transform) */ aubio_filterbank_t *new_aubio_filterbank (uint_t n_filters, uint_t win_s); /** destroy filterbank object \param f filterbank object, as returned by new_aubio_filterbank() */ void del_aubio_filterbank (aubio_filterbank_t * f); /** compute filterbank \param f filterbank object, as returned by new_aubio_filterbank() \param in input spectrum containing an input spectrum of length `win_s` \param out output vector containing the energy found in each band, `nfilt` output values */ void aubio_filterbank_do (aubio_filterbank_t * f, cvec_t * in, fvec_t * out); /** return a pointer to the matrix object containing all filter coefficients \param f filterbank object, as returned by new_aubio_filterbank() */ fmat_t *aubio_filterbank_get_coeffs (aubio_filterbank_t * f); /** copy filter coefficients to the filterbank \param f filterbank object, as returned by new_aubio_filterbank() \param filters filter bank coefficients to copy from */ uint_t aubio_filterbank_set_coeffs (aubio_filterbank_t * f, fmat_t * filters); #ifdef __cplusplus } #endif #endif /* _AUBIO_FILTERBANK_H */