source: src/spectral/filterbank_mel.h @ cfd35db

/*
  Copyright (C) 2007-2009 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

  Mel frequency filter bankd coefficients 

  Set filter bank coefficients to Mel frequency bands.

  The filter coefficients are built according to Malcolm Slaney's Auditory
  Toolbox available at http://cobweb.ecn.purdue.edu/~malcolm/interval/1998-010/
  (see the file mfcc.m). 

*/

#ifndef FILTERBANK_MEL_H
#define FILTERBANK_MEL_H

#ifdef __cplusplus
extern "C"
{
#endif

#include "filterbank.h"

/** 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

*/
void aubio_filterbank_set_mel_coeffs (aubio_filterbank_t * fb,
    uint_t samplerate, smpl_t freq_min, smpl_t freq_max);

#ifdef __cplusplus
}
#endif

#endif                          // FILTERBANK_MEL_H