source: examples/aubiomfcc.c @ 5a66677

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 5a66677 was 5a66677, checked in by Paul Brossier <piem@piem.org>, 7 years ago

examples/: use aubio_source and aubio_sink

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1/*
2  Copyright (C) 2007-2009 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
23/* mfcc objects */
24fvec_t * mfcc_out;
25aubio_mfcc_t * mfcc;
26aubio_pvoc_t *pv;
27cvec_t *fftgrain;
28
29uint_t n_filters = 40;
30uint_t n_coefs = 13;
31
32unsigned int pos = 0; /*frames%dspblocksize*/
33
34static int aubio_process(smpl_t **input, smpl_t **output, int nframes) {
35  unsigned int j;       /*frames*/
36 
37  for (j=0;j<(unsigned)nframes;j++) {
38    if(usejack) {
39      /* write input to datanew */
40      fvec_write_sample(ibuf, input[0][j], pos);
41      /* put synthnew in output */
42      output[0][j] = fvec_read_sample(obuf, pos);
43    }
44    /*time for fft*/
45    if (pos == overlap_size-1) {         
46      /* block loop */
47     
48      //compute mag spectrum
49      aubio_pvoc_do (pv, ibuf, fftgrain);
50     
51      //compute mfccs
52      aubio_mfcc_do(mfcc, fftgrain, mfcc_out);
53     
54      /* end of block loop */
55      pos = -1; /* so it will be zero next j loop */
56    }
57    pos++;
58  }
59  return 1;
60}
61
62static void process_print (void) {
63      /* output times in seconds
64         write extracted mfccs
65      */
66     
67      uint_t coef_cnt;
68      if (sink_uri == NULL) {
69        outmsg("%f\t",frames*overlap_size/(float)samplerate);
70        for (coef_cnt = 0; coef_cnt < n_coefs; coef_cnt++) {
71            outmsg("%f ", fvec_read_sample (mfcc_out, coef_cnt) );
72        }
73        outmsg("\n");
74      }
75}
76
77int main(int argc, char **argv) {
78  // params
79  buffer_size  = 512;
80  overlap_size = 256;
81 
82  examples_common_init(argc,argv);
83
84  /* phase vocoder */
85  pv = new_aubio_pvoc (buffer_size, overlap_size);
86
87  fftgrain = new_cvec (buffer_size);
88
89  //populating the filter
90  mfcc = new_aubio_mfcc(buffer_size, n_filters, n_coefs, samplerate);
91 
92  mfcc_out = new_fvec(n_coefs);
93 
94  //process
95  examples_common_process(aubio_process,process_print);
96 
97  //destroying mfcc
98  del_aubio_pvoc (pv);
99  del_cvec (fftgrain);
100  del_aubio_mfcc(mfcc);
101  del_fvec(mfcc_out);
102
103  examples_common_del();
104  debug("End of program.\n");
105  fflush(stderr);
106 
107  return 0;
108}
109
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