source: src/tss.c @ 28d8c4a

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 28d8c4a was 28d8c4a, checked in by Paul Brossier <piem@altern.org>, 19 years ago

prefix mathutils function with aubio_

  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2   Copyright (C) 2003 Paul Brossier
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
20/* default values : alfa=4, beta=3, threshold=0.25 */
21
22#include "aubio_priv.h"
23#include "sample.h"
24#include "mathutils.h"
25#include "tss.h"
26
27struct _aubio_tss_t
28{
29  smpl_t thrs;
30  smpl_t alfa;
31  smpl_t beta;
32  smpl_t parm;
33  fvec_t *theta1;
34  fvec_t *theta2;
35  fvec_t *oft1;
36  fvec_t *oft2;
37  fvec_t *dev;
38};
39
40void aubio_tss_do(aubio_tss_t *o, cvec_t * input, 
41    cvec_t * trans, cvec_t * stead)
42{
43  uint_t i,j;
44  uint_t test; 
45  uint_t nbins     = input->length;
46  uint_t channels  = input->channels;
47  smpl_t alfa      = o->alfa;
48  smpl_t beta      = o->beta;
49  smpl_t parm      = o->parm;
50  smpl_t ** dev    = (smpl_t **)o->dev->data;
51  smpl_t ** oft1   = (smpl_t **)o->oft1->data;
52  smpl_t ** oft2   = (smpl_t **)o->oft2->data;
53  smpl_t ** theta1 = (smpl_t **)o->theta1->data;
54  smpl_t ** theta2 = (smpl_t **)o->theta2->data;
55  /* second phase derivative */
56  for (i=0;i<channels; i++){
57    for (j=0;j<nbins; j++){
58      dev[i][j] = aubio_unwrap2pi(input->phas[i][j]
59          -2.0*theta1[i][j]+theta2[i][j]);
60      theta2[i][j] = theta1[i][j];
61      theta1[i][j] = input->phas[i][j];
62    }
63
64    for (j=0;j<nbins; j++){
65      /* transient analysis */
66      test = (ABS(dev[i][j]) > parm*oft1[i][j]);
67      trans->norm[i][j] = input->norm[i][j] * test;
68      trans->phas[i][j] = input->phas[i][j] * test;
69    }
70
71    for (j=0;j<nbins; j++){
72      /* steady state analysis */
73      test = (ABS(dev[i][j]) < parm*oft2[i][j]);
74      stead->norm[i][j] = input->norm[i][j] * test;
75      stead->phas[i][j] = input->phas[i][j] * test;
76
77      /*increase sstate probability for sines */
78      test = (trans->norm[i][j]==0.);
79      oft1[i][j]  = test;
80      test = (stead->norm[i][j]==0.);
81      oft2[i][j]  = test;
82      test = (trans->norm[i][j]>0.);
83      oft1[i][j] += alfa*test;
84      test = (stead->norm[i][j]>0.);
85      oft2[i][j] += alfa*test;
86      test = (oft1[i][j]>1. && trans->norm[i][j]>0.);
87      oft1[i][j] += beta*test;
88      test = (oft2[i][j]>1. && stead->norm[i][j]>0.);
89      oft2[i][j] += beta*test;
90    }
91  }
92}
93
94aubio_tss_t * new_aubio_tss(smpl_t thrs, smpl_t alfa, smpl_t beta, 
95    uint_t size, uint_t overlap,uint_t channels)
96{
97  aubio_tss_t * o = AUBIO_NEW(aubio_tss_t);
98  uint_t rsize = size/2+1;
99  o->thrs = thrs;
100  o->alfa = alfa;       
101  o->beta = beta;       
102  o->parm = thrs*TWO_PI*overlap/rsize;
103  o->theta1 = new_fvec(rsize,channels);
104  o->theta2 = new_fvec(rsize,channels);
105  o->oft1 = new_fvec(rsize,channels);
106  o->oft2 = new_fvec(rsize,channels);
107  o->dev = new_fvec(rsize,channels);
108  return o;
109}
110
111void del_aubio_tss(aubio_tss_t *s)
112{
113  free(s->theta1);
114  free(s->theta2);
115  free(s->oft1);
116  free(s->oft2);
117  free(s->dev);
118  free(s);
119}
120
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