ref: 6a03729dc3c88d056ba0b883d25ecf49adfc4a50
dir: /examples/aubiomfcc.c/
/* Copyright (C) 2007-2009 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" /* mfcc objects */ fvec_t * mfcc_out; aubio_mfcc_t * mfcc; aubio_pvoc_t *pv; cvec_t *fftgrain; uint_t n_filters = 40; uint_t n_coefs = 13; unsigned int pos = 0; /*frames%dspblocksize*/ static int aubio_process(smpl_t **input, smpl_t **output, int nframes) { unsigned int j; /*frames*/ for (j=0;j<(unsigned)nframes;j++) { if(usejack) { /* write input to datanew */ fvec_write_sample(ibuf, input[0][j], pos); /* put synthnew in output */ output[0][j] = fvec_read_sample(obuf, pos); } /*time for fft*/ if (pos == overlap_size-1) { /* block loop */ //compute mag spectrum aubio_pvoc_do (pv, ibuf, fftgrain); //compute mfccs aubio_mfcc_do(mfcc, fftgrain, mfcc_out); /* end of block loop */ pos = -1; /* so it will be zero next j loop */ } pos++; } return 1; } static void process_print (void) { /* output times in seconds write extracted mfccs */ uint_t coef_cnt; if (sink_uri == NULL) { outmsg("%f\t",frames*overlap_size/(float)samplerate); for (coef_cnt = 0; coef_cnt < n_coefs; coef_cnt++) { outmsg("%f ", fvec_read_sample (mfcc_out, coef_cnt) ); } outmsg("\n"); } } int main(int argc, char **argv) { // params buffer_size = 512; overlap_size = 256; examples_common_init(argc,argv); /* phase vocoder */ pv = new_aubio_pvoc (buffer_size, overlap_size); fftgrain = new_cvec (buffer_size); //populating the filter mfcc = new_aubio_mfcc(buffer_size, n_filters, n_coefs, samplerate); mfcc_out = new_fvec(n_coefs); //process examples_common_process(aubio_process,process_print); //destroying mfcc del_aubio_pvoc (pv); del_cvec (fftgrain); del_aubio_mfcc(mfcc); del_fvec(mfcc_out); examples_common_del(); debug("End of program.\n"); fflush(stderr); return 0; }