source: src/utils/hist.c @ 042d77d

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5
Last change on this file since 042d77d was 042d77d, checked in by Paul Brossier <piem@piem.org>, 6 years ago

[utils] hist with size null fails

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File size: 3.5 KB
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1/*
2  Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#include "aubio_priv.h"
22#include "fvec.h"
23#include "utils/scale.h"
24#include "mathutils.h" //fvec_min fvec_max
25#include "utils/hist.h"
26
27/********
28 * Object Structure
29 */
30
31struct _aubio_hist_t {
32  fvec_t * hist;
33  uint_t nelems;
34  fvec_t * cent;
35  aubio_scale_t *scaler;
36};
37
38/**
39 * Object creation/deletion calls
40 */
41aubio_hist_t * new_aubio_hist (smpl_t flow, smpl_t fhig, uint_t nelems){
42  aubio_hist_t * s = AUBIO_NEW(aubio_hist_t);
43  smpl_t step = (fhig-flow)/(smpl_t)(nelems);
44  smpl_t accum = step;
45  uint_t i;
46  if ((sint_t)nelems <= 0) {
47    return NULL;
48  }
49  s->nelems = nelems;
50  s->hist = new_fvec(nelems);
51  s->cent = new_fvec(nelems);
52
53  /* use scale to map flow/fhig -> 0/nelems */
54  s->scaler = new_aubio_scale(flow,fhig,0,nelems);
55  /* calculate centers now once */
56  s->cent->data[0] = flow + 0.5 * step;
57  for (i=1; i < s->nelems; i++, accum+=step )
58    s->cent->data[i] = s->cent->data[0] + accum;
59
60  return s;
61}
62
63void del_aubio_hist(aubio_hist_t *s) {
64  del_fvec(s->hist);
65  del_fvec(s->cent);
66  del_aubio_scale(s->scaler);
67  AUBIO_FREE(s);
68}
69
70/***
71 * do it
72 */
73void aubio_hist_do (aubio_hist_t *s, fvec_t *input) {
74  uint_t j;
75  sint_t tmp = 0;
76  aubio_scale_do(s->scaler, input);
77  /* reset data */
78  fvec_zeros(s->hist);
79  /* run accum */
80  for (j=0;  j < input->length; j++)
81  {
82    tmp = (sint_t)FLOOR(input->data[j]);
83    if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) {
84      s->hist->data[tmp] += 1;
85    }
86  }
87}
88
89void aubio_hist_do_notnull (aubio_hist_t *s, fvec_t *input) {
90  uint_t j;
91  sint_t tmp = 0;
92  aubio_scale_do(s->scaler, input);
93  /* reset data */
94  fvec_zeros(s->hist);
95  /* run accum */
96  for (j=0;  j < input->length; j++) {
97    if (input->data[j] != 0) {
98      tmp = (sint_t)FLOOR(input->data[j]);
99      if ((tmp >= 0) && (tmp < (sint_t)s->nelems))
100        s->hist->data[tmp] += 1;
101    }
102  }
103}
104
105
106void aubio_hist_dyn_notnull (aubio_hist_t *s, fvec_t *input) {
107  uint_t i;
108  sint_t tmp = 0;
109  smpl_t ilow = fvec_min(input);
110  smpl_t ihig = fvec_max(input);
111  smpl_t step = (ihig-ilow)/(smpl_t)(s->nelems);
112
113  /* readapt */
114  aubio_scale_set_limits (s->scaler, ilow, ihig, 0, s->nelems);
115
116  /* recalculate centers */
117  s->cent->data[0] = ilow + 0.5f * step;
118  for (i=1; i < s->nelems; i++)
119    s->cent->data[i] = s->cent->data[0] + i * step;
120
121  /* scale */
122  aubio_scale_do(s->scaler, input);
123
124  /* reset data */
125  fvec_zeros(s->hist);
126  /* run accum */
127  for (i=0;  i < input->length; i++) {
128    if (input->data[i] != 0) {
129      tmp = (sint_t)FLOOR(input->data[i]);
130      if ((tmp >= 0) && (tmp < (sint_t)s->nelems))
131        s->hist->data[tmp] += 1;
132    }
133  }
134}
135
136void aubio_hist_weight (aubio_hist_t *s) {
137  uint_t j;
138  for (j=0; j < s->nelems; j++) {
139    s->hist->data[j] *= s->cent->data[j];
140  }
141}
142
143smpl_t aubio_hist_mean (const aubio_hist_t *s) {
144  uint_t j;
145  smpl_t tmp = 0.0;
146  for (j=0; j < s->nelems; j++)
147    tmp += s->hist->data[j];
148  return tmp/(smpl_t)(s->nelems);
149}
150
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