ref: 89bc6f4938d3c1e41e351d7cd8314ed3fb3cd433
dir: /examples/aubiomfcc.c/
/* Copyright (C) 2007-2013 Paul Brossier <piem@aubio.org> 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/>. */ #include "utils.h" #include "parse_args.h" aubio_pvoc_t *pv; // a phase vocoder cvec_t *fftgrain; // outputs a spectrum aubio_mfcc_t * mfcc; // which the mfcc will process fvec_t * mfcc_out; // to get the output coefficients uint_t n_filters = 40; uint_t n_coefs = 13; void process_block (fvec_t *ibuf, fvec_t *obuf) { fvec_zeros(obuf); //compute mag spectrum aubio_pvoc_do (pv, ibuf, fftgrain); //compute mfccs aubio_mfcc_do(mfcc, fftgrain, mfcc_out); } void process_print (void) { /* output times in selected format */ print_time (blocks * hop_size); outmsg ("\t"); /* output extracted mfcc */ fvec_print (mfcc_out); } int main(int argc, char **argv) { int ret = 0; // change some default params buffer_size = 512; hop_size = 256; examples_common_init(argc,argv); verbmsg ("using source: %s at %dHz\n", source_uri, samplerate); verbmsg ("buffer_size: %d, ", buffer_size); verbmsg ("hop_size: %d\n", hop_size); pv = new_aubio_pvoc (buffer_size, hop_size); fftgrain = new_cvec (buffer_size); mfcc = new_aubio_mfcc(buffer_size, n_filters, n_coefs, samplerate); mfcc_out = new_fvec(n_coefs); if (pv == NULL || fftgrain == NULL || mfcc == NULL || mfcc_out == NULL) { ret = 1; goto beach; } examples_common_process((aubio_process_func_t)process_block, process_print); del_aubio_pvoc (pv); del_cvec (fftgrain); del_aubio_mfcc(mfcc); del_fvec(mfcc_out); beach: examples_common_del(); return ret; }