source: src/tss.c @ fff2bee

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since fff2bee was 102b732, checked in by Paul Brossier <piem@altern.org>, 18 years ago

added aubio_tss_set_thres function
added aubio_tss_set_thres function

  • Property mode set to 100644
File size: 3.5 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  smpl_t thrsfact;
34  fvec_t *theta1;
35  fvec_t *theta2;
36  fvec_t *oft1;
37  fvec_t *oft2;
38  fvec_t *dev;
39};
40
41void aubio_tss_do(aubio_tss_t *o, cvec_t * input, 
42    cvec_t * trans, cvec_t * stead)
43{
44  uint_t i,j;
45  uint_t test; 
46  uint_t nbins     = input->length;
47  uint_t channels  = input->channels;
48  smpl_t alfa      = o->alfa;
49  smpl_t beta      = o->beta;
50  smpl_t parm      = o->parm;
51  smpl_t ** dev    = (smpl_t **)o->dev->data;
52  smpl_t ** oft1   = (smpl_t **)o->oft1->data;
53  smpl_t ** oft2   = (smpl_t **)o->oft2->data;
54  smpl_t ** theta1 = (smpl_t **)o->theta1->data;
55  smpl_t ** theta2 = (smpl_t **)o->theta2->data;
56  /* second phase derivative */
57  for (i=0;i<channels; i++){
58    for (j=0;j<nbins; j++){
59      dev[i][j] = aubio_unwrap2pi(input->phas[i][j]
60          -2.0*theta1[i][j]+theta2[i][j]);
61      theta2[i][j] = theta1[i][j];
62      theta1[i][j] = input->phas[i][j];
63    }
64
65    for (j=0;j<nbins; j++){
66      /* transient analysis */
67      test = (ABS(dev[i][j]) > parm*oft1[i][j]);
68      trans->norm[i][j] = input->norm[i][j] * test;
69      trans->phas[i][j] = input->phas[i][j] * test;
70    }
71
72    for (j=0;j<nbins; j++){
73      /* steady state analysis */
74      test = (ABS(dev[i][j]) < parm*oft2[i][j]);
75      stead->norm[i][j] = input->norm[i][j] * test;
76      stead->phas[i][j] = input->phas[i][j] * test;
77
78      /*increase sstate probability for sines */
79      test = (trans->norm[i][j]==0.);
80      oft1[i][j]  = test;
81      test = (stead->norm[i][j]==0.);
82      oft2[i][j]  = test;
83      test = (trans->norm[i][j]>0.);
84      oft1[i][j] += alfa*test;
85      test = (stead->norm[i][j]>0.);
86      oft2[i][j] += alfa*test;
87      test = (oft1[i][j]>1. && trans->norm[i][j]>0.);
88      oft1[i][j] += beta*test;
89      test = (oft2[i][j]>1. && stead->norm[i][j]>0.);
90      oft2[i][j] += beta*test;
91    }
92  }
93}
94
95void aubio_tss_set_thres(aubio_tss_t *o, smpl_t thrs){
96        o->thrs = thrs;
97        o->parm = thrs*o->thrsfact;
98}
99
100aubio_tss_t * new_aubio_tss(smpl_t thrs, smpl_t alfa, smpl_t beta, 
101    uint_t size, uint_t overlap,uint_t channels)
102{
103  aubio_tss_t * o = AUBIO_NEW(aubio_tss_t);
104  uint_t rsize = size/2+1;
105  o->thrs = thrs;
106  o->thrsfact = TWO_PI*overlap/rsize;
107  o->alfa = alfa;       
108  o->beta = beta;       
109  o->parm = thrs*o->thrsfact;
110  o->theta1 = new_fvec(rsize,channels);
111  o->theta2 = new_fvec(rsize,channels);
112  o->oft1 = new_fvec(rsize,channels);
113  o->oft2 = new_fvec(rsize,channels);
114  o->dev = new_fvec(rsize,channels);
115  return o;
116}
117
118void del_aubio_tss(aubio_tss_t *s)
119{
120  free(s->theta1);
121  free(s->theta2);
122  free(s->oft1);
123  free(s->oft2);
124  free(s->dev);
125  free(s);
126}
127
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