source: examples/aubiomfcc.c @ 9e84cc5

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 9e84cc5 was 9e84cc5, checked in by Paul Brossier <piem@piem.org>, 13 years ago

examples/utils.c,aubiomfcc.c: do not set mfcc parameters here, do that in aubiomfcc.c instead

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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;
25
26uint_t n_filters = 40;
27uint_t n_coefs = 11;
28
29unsigned int pos = 0; /*frames%dspblocksize*/
30uint_t usepitch = 0;
31
32int aubio_process(float **input, float **output, int nframes);
33int aubio_process(float **input, float **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
64void process_print (void);
65void process_print (void) {
66      /* output times in seconds
67         write extracted mfccs
68      */
69     
70      uint_t coef_cnt;
71      if (output_filename == NULL) {
72         if(frames >= 4) {
73           outmsg("%f\t",(frames-4)*overlap_size/(float)samplerate);
74         } 
75         else if (frames < 4) {
76           outmsg("%f\t",0.);
77         }
78        for (coef_cnt = 0; coef_cnt < n_coefs; coef_cnt++) {
79            outmsg("%f ",mfcc_out->data[0][coef_cnt]);
80        }
81        outmsg("\n");
82      }
83}
84
85int main(int argc, char **argv) {
86  // params
87  buffer_size  = 1024;
88  overlap_size = 512;
89 
90  examples_common_init(argc,argv);
91  smpl_t lowfreq = 133.333f;
92  smpl_t highfreq = 44100.f;
93  mfcc_out = new_fvec(n_coefs,channels);
94 
95 
96  //populating the filter
97  mfcc = new_aubio_mfcc(buffer_size, samplerate, n_filters, n_coefs , lowfreq, highfreq, channels);
98 
99  //process
100  examples_common_process(aubio_process,process_print);
101 
102  //destroying mfcc
103  del_aubio_mfcc(mfcc);
104  del_fvec(mfcc_out);
105
106  examples_common_del();
107  debug("End of program.\n");
108  fflush(stderr);
109 
110  return 0;
111}
112
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