source: examples/aubiomfcc.c @ 466dff3

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 466dff3 was 466dff3, checked in by Paul Brossier <piem@piem.org>, 6 years ago

examples/: large refactoring, improve option management, remove old stuff, move blocking logic to jackio

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1/*
2  Copyright (C) 2007-2013 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#include "utils.h"
22#include "parse_args.h"
23
24aubio_pvoc_t *pv;    // a phase vocoder
25cvec_t *fftgrain;    // outputs a spectrum
26aubio_mfcc_t * mfcc; // which the mfcc will process
27fvec_t * mfcc_out;   // to get the output coefficients
28
29uint_t n_filters = 40;
30uint_t n_coefs = 13;
31
32static void
33process_block(fvec_t *ibuf, fvec_t *obuf) {
34  fvec_zeros(obuf);
35  //compute mag spectrum
36  aubio_pvoc_do (pv, ibuf, fftgrain);
37  //compute mfccs
38  aubio_mfcc_do(mfcc, fftgrain, mfcc_out);
39}
40
41static void process_print (void) {
42  /* output times in seconds and extracted mfccs */
43  outmsg("%f\t",blocks*hop_size/(float)samplerate);
44  fvec_print(mfcc_out);
45}
46
47int main(int argc, char **argv) {
48  // change some default params
49  buffer_size  = 512;
50  hop_size = 256;
51
52  examples_common_init(argc,argv);
53
54  verbmsg ("using source: %s at %dHz\n", source_uri, samplerate);
55  verbmsg ("buffer_size: %d, ", buffer_size);
56  verbmsg ("hop_size: %d\n", hop_size);
57
58  pv = new_aubio_pvoc (buffer_size, hop_size);
59  fftgrain = new_cvec (buffer_size);
60  mfcc = new_aubio_mfcc(buffer_size, n_filters, n_coefs, samplerate);
61  mfcc_out = new_fvec(n_coefs);
62
63  examples_common_process((aubio_process_func_t)process_block, process_print);
64
65  del_aubio_pvoc (pv);
66  del_cvec (fftgrain);
67  del_aubio_mfcc(mfcc);
68  del_fvec(mfcc_out);
69
70  examples_common_del();
71  return 0;
72}
73
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