source: examples/aubiomfcc.c @ 740f06b

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 740f06b was d4c5de7, checked in by Paul Brossier <piem@piem.org>, 11 years ago

examples/: make use of aubio_onset in aubioonset and aubionotes, simplify, keep only general stuff in utils

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1/*
2   Copyright (C) 2007 Amaury Hazan <ahazan@iua.upf.edu>
3                  and Paul Brossier <piem@piem.org>
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software
17   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18*/
19
20#include "utils.h"
21
22/* mfcc objects */
23fvec_t * mfcc_out;
24aubio_mfcc_t * mfcc;
25aubio_pvoc_t *pv;
26cvec_t *fftgrain;
27
28uint_t n_filters = 40;
29uint_t n_coefs = 13;
30
31unsigned int pos = 0; /*frames%dspblocksize*/
32
33static int aubio_process(smpl_t **input, smpl_t **output, int nframes) {
34  unsigned int i;       /*channels*/
35  unsigned int j;       /*frames*/
36 
37  for (j=0;j<(unsigned)nframes;j++) {
38    if(usejack) {
39      for (i=0;i<channels;i++) {
40        /* write input to datanew */
41        fvec_write_sample(ibuf, input[i][j], i, pos);
42        /* put synthnew in output */
43        output[i][j] = fvec_read_sample(obuf, i, pos);
44      }
45    }
46    /*time for fft*/
47    if (pos == overlap_size-1) {         
48      /* block loop */
49     
50      //compute mag spectrum
51      aubio_pvoc_do (pv,ibuf, fftgrain);
52     
53      //compute mfccs
54      aubio_mfcc_do(mfcc, fftgrain, mfcc_out);
55     
56      /* end of block loop */
57      pos = -1; /* so it will be zero next j loop */
58    }
59    pos++;
60  }
61  return 1;
62}
63
64static void process_print (void) {
65      /* output times in seconds
66         write extracted mfccs
67      */
68     
69      uint_t coef_cnt;
70      if (output_filename == NULL) {
71        outmsg("%f\t",frames*overlap_size/(float)samplerate);
72        for (coef_cnt = 0; coef_cnt < n_coefs; coef_cnt++) {
73            outmsg("%f ",mfcc_out->data[0][coef_cnt]);
74        }
75        outmsg("\n");
76      }
77}
78
79int main(int argc, char **argv) {
80  // params
81  buffer_size  = 512;
82  overlap_size = 256;
83 
84  examples_common_init(argc,argv);
85
86  /* phase vocoder */
87  pv = new_aubio_pvoc (buffer_size, overlap_size, channels);
88
89  fftgrain = new_cvec (buffer_size, channels);
90
91  //populating the filter
92  mfcc = new_aubio_mfcc(buffer_size, n_filters, n_coefs, samplerate);
93 
94  mfcc_out = new_fvec(n_coefs,channels);
95 
96  //process
97  examples_common_process(aubio_process,process_print);
98 
99  //destroying mfcc
100  del_aubio_pvoc (pv);
101  del_cvec (fftgrain);
102  del_aubio_mfcc(mfcc);
103  del_fvec(mfcc_out);
104
105  examples_common_del();
106  debug("End of program.\n");
107  fflush(stderr);
108 
109  return 0;
110}
111
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