ref: 651cac88d6cebcebc86b18cbec1efeb397190ade
dir: /src/spectral/filterbank.h/
/* Copyright (C) 2007 Amaury Hazan <ahazan@iua.upf.edu> and Paul Brossier <piem@piem.org> This program 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 2 of the License, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /** \file Filterbank object General-purpose spectral filterbank object. Comes with mel-filter initialization function. */ #ifndef FILTERBANK_H #define FILTERBANK_H #ifdef __cplusplus extern "C" { #endif /** filterbank object */ typedef struct aubio_filterbank_t_ aubio_filterbank_t; /** create filterbank object \param win_s size of analysis buffer (and length the FFT transform) \param n_filters number of filters to create */ aubio_filterbank_t * new_aubio_filterbank(uint_t n_filters, uint_t win_s); /** filterbank initialization for mel filters \param n_filters number of filters \param win_s window size \param samplerate \param freq_min lowest filter frequency \param freq_max highest filter frequency */ aubio_filterbank_t * new_aubio_filterbank_mfcc(uint_t n_filters, uint_t win_s, uint_t samplerate, smpl_t freq_min, smpl_t freq_max); /** destroy filterbank object \param fb filterbank, as returned by new_aubio_filterbank method */ void del_aubio_filterbank(aubio_filterbank_t * fb); /** compute filterbank */ void aubio_filterbank_do(aubio_filterbank_t * fb, cvec_t * in, fvec_t *out); /** return the vector containing the filter coefficients of one channel */ fvec_t * aubio_filterbank_getchannel(aubio_filterbank_t * f, uint_t channel); #ifdef __cplusplus } #endif #endif // FILTERBANK_H