ref: e99242a33df6cf2194cf4411475a194597f8a439
dir: /src/spectral/mfcc.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 Mel-Frequency Cepstrum Coefficients object This object computes MFCC coefficients on an input cvec_t. The implementation follows the specifications established by Malcolm Slaney in its Auditory Toolbox, available online (see file mfcc.m). http://engineering.ecn.purdue.edu/~malcolm/interval/1998-010/ \example spectral/test-mfcc.c */ #ifndef AUBIO_MFCC_H #define AUBIO_MFCC_H #ifdef __cplusplus extern "C" { #endif /** mfcc object */ typedef struct _aubio_mfcc_t aubio_mfcc_t; /** create mfcc object \param buf_size size of analysis buffer (and length the FFT transform) \param samplerate audio sampling rate \param n_coeffs number of desired coefficients \param n_filters number of desired filters */ aubio_mfcc_t *new_aubio_mfcc (uint_t buf_size, uint_t n_filters, uint_t n_coeffs, uint_t samplerate); /** delete mfcc object \param mf mfcc object as returned by new_aubio_mfcc */ void del_aubio_mfcc (aubio_mfcc_t * mf); /** mfcc object processing \param mf mfcc object as returned by new_aubio_mfcc \param in input spectrum (buf_size long) \param out output mel coefficients buffer (n_coeffs long) */ void aubio_mfcc_do (aubio_mfcc_t * mf, const cvec_t * in, fvec_t * out); #ifdef __cplusplus } #endif #endif /* AUBIO_MFCC_H */