source: examples/aubiomfcc.c @ dcc649c

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since dcc649c was dcc649c, checked in by Amaury Hazan <mahmoudax@gmail.org>, 13 years ago

minor changes

  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*
2   Copyright (C) 2007 Amaury Hazan
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17*/
18
19#include "utils.h"
20
21unsigned int pos = 0; /*frames%dspblocksize*/
22uint_t usepitch = 0;
23
24int aubio_process(float **input, float **output, int nframes);
25int aubio_process(float **input, float **output, int nframes) {
26  unsigned int i;       /*channels*/
27  unsigned int j;       /*frames*/
28 
29  // declare the mel filter bank
30  // TODO: should be done only once
31  aubio_mfcc_init(int N, NYQUIST, int style, float freq_min, float freq_max, int freq_bands, float **fft_tables);
32
33  for (j=0;j<(unsigned)nframes;j++) {
34    if(usejack) {
35      for (i=0;i<channels;i++) {
36        /* write input to datanew */
37        fvec_write_sample(ibuf, input[i][j], i, pos);
38        /* put synthnew in output */
39        output[i][j] = fvec_read_sample(obuf, i, pos);
40      }
41    }
42    /*time for fft*/
43    if (pos == overlap_size-1) {         
44      /* block loop */
45     
46      //compute mag spectrum
47      aubio_pvoc_do (pv,ibuf, fftgrain);
48     
49      //TODO: extract Magnitude buffer f_fvec from fftgrain cvec
50
51      //compute mfccs
52      aubio_mffc_do (magbuf, nframes, filterbank, outbuf);
53     
54     
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      if (output_filename == NULL) {
71        if(frames >= 4) {
72          outmsg("%f\n",(frames-4)*overlap_size/(float)samplerate);
73        } else if (frames < 4) {
74          outmsg("%f\n",0.);
75        }
76      }
77}
78
79int main(int argc, char **argv) {
80  examples_common_init(argc,argv);
81  examples_common_process(aubio_process,process_print);
82  examples_common_del();
83  debug("End of program.\n");
84  fflush(stderr);
85  return 0;
86}
87
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