1 | /* |
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2 | Copyright (C) 2007-2009 Paul Brossier <piem@aubio.org> |
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3 | |
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4 | This file is part of aubio. |
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5 | |
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6 | aubio is free software: you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation, either version 3 of the License, or |
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9 | (at your option) any later version. |
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10 | |
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11 | aubio is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with aubio. If not, see <http://www.gnu.org/licenses/>. |
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18 | |
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19 | */ |
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20 | |
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21 | #include "utils.h" |
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22 | |
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23 | /* mfcc objects */ |
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24 | fvec_t * mfcc_out; |
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25 | aubio_mfcc_t * mfcc; |
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26 | aubio_pvoc_t *pv; |
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27 | cvec_t *fftgrain; |
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28 | |
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29 | uint_t n_filters = 40; |
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30 | uint_t n_coefs = 13; |
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31 | |
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32 | unsigned int pos = 0; /*frames%dspblocksize*/ |
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33 | |
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34 | static int aubio_process(smpl_t **input, smpl_t **output, int nframes) { |
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35 | unsigned int j; /*frames*/ |
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36 | |
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37 | for (j=0;j<(unsigned)nframes;j++) { |
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38 | if(usejack) { |
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39 | /* write input to datanew */ |
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40 | fvec_write_sample(ibuf, input[0][j], pos); |
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41 | /* put synthnew in output */ |
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42 | output[0][j] = fvec_read_sample(obuf, pos); |
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43 | } |
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44 | /*time for fft*/ |
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45 | if (pos == overlap_size-1) { |
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46 | /* block loop */ |
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47 | |
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48 | //compute mag spectrum |
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49 | aubio_pvoc_do (pv, ibuf, fftgrain); |
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50 | |
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51 | //compute mfccs |
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52 | aubio_mfcc_do(mfcc, fftgrain, mfcc_out); |
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53 | |
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54 | /* end of block loop */ |
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55 | pos = -1; /* so it will be zero next j loop */ |
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56 | } |
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57 | pos++; |
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58 | } |
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59 | return 1; |
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60 | } |
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61 | |
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62 | static void process_print (void) { |
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63 | /* output times in seconds |
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64 | write extracted mfccs |
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65 | */ |
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66 | |
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67 | uint_t coef_cnt; |
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68 | if (output_filename == NULL) { |
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69 | outmsg("%f\t",frames*overlap_size/(float)samplerate); |
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70 | for (coef_cnt = 0; coef_cnt < n_coefs; coef_cnt++) { |
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71 | outmsg("%f ", fvec_read_sample (mfcc_out, coef_cnt) ); |
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72 | } |
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73 | outmsg("\n"); |
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74 | } |
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75 | } |
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76 | |
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77 | int main(int argc, char **argv) { |
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78 | // params |
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79 | buffer_size = 512; |
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80 | overlap_size = 256; |
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81 | |
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82 | examples_common_init(argc,argv); |
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83 | |
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84 | /* phase vocoder */ |
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85 | pv = new_aubio_pvoc (buffer_size, overlap_size); |
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86 | |
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87 | fftgrain = new_cvec (buffer_size); |
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88 | |
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89 | //populating the filter |
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90 | mfcc = new_aubio_mfcc(buffer_size, n_filters, n_coefs, samplerate); |
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91 | |
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92 | mfcc_out = new_fvec(n_coefs); |
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93 | |
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94 | //process |
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95 | examples_common_process(aubio_process,process_print); |
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96 | |
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97 | //destroying mfcc |
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98 | del_aubio_pvoc (pv); |
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99 | del_cvec (fftgrain); |
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100 | del_aubio_mfcc(mfcc); |
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101 | del_fvec(mfcc_out); |
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102 | |
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103 | examples_common_del(); |
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104 | debug("End of program.\n"); |
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105 | fflush(stderr); |
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106 | |
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107 | return 0; |
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108 | } |
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109 | |
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