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 | #include "aubio_priv.h" |
---|
20 | #include "sample.h" |
---|
21 | #include "scale.h" |
---|
22 | #include "mathutils.h" //vec_min vec_max |
---|
23 | #include "hist.h" |
---|
24 | |
---|
25 | /******** |
---|
26 | * Object Structure |
---|
27 | */ |
---|
28 | |
---|
29 | struct _aubio_hist_t { |
---|
30 | /*bug: move to a fvec */ |
---|
31 | smpl_t ** hist; |
---|
32 | uint_t nelems; |
---|
33 | uint_t channels; |
---|
34 | smpl_t * cent; |
---|
35 | aubio_scale_t *scaler; |
---|
36 | }; |
---|
37 | |
---|
38 | /** |
---|
39 | * Object creation/deletion calls |
---|
40 | */ |
---|
41 | aubio_hist_t * new_aubio_hist (smpl_t ilow, smpl_t ihig, uint_t nelems, uint_t channels){ |
---|
42 | aubio_hist_t * s = AUBIO_NEW(aubio_hist_t); |
---|
43 | smpl_t step = (ihig-ilow)/(smpl_t)(nelems); |
---|
44 | smpl_t accum = step; |
---|
45 | uint_t i; |
---|
46 | s->channels = channels; |
---|
47 | s->nelems = nelems; |
---|
48 | s->hist = AUBIO_ARRAY(smpl_t*, channels); |
---|
49 | for (i=0; i< s->channels; i++) { |
---|
50 | s->hist[i] = AUBIO_ARRAY(smpl_t, nelems); |
---|
51 | } |
---|
52 | s->cent = AUBIO_ARRAY(smpl_t, nelems); |
---|
53 | |
---|
54 | /* use scale to map ilow/ihig -> 0/nelems */ |
---|
55 | s->scaler = new_aubio_scale(ilow,ihig,0,nelems); |
---|
56 | /* calculate centers now once */ |
---|
57 | s->cent[0] = ilow + 0.5 * step; |
---|
58 | for (i=1; i < s->nelems; i++, accum+=step ) |
---|
59 | s->cent[i] = s->cent[0] + accum; |
---|
60 | |
---|
61 | return s; |
---|
62 | } |
---|
63 | |
---|
64 | void del_aubio_hist(aubio_hist_t *s) { |
---|
65 | uint_t i; |
---|
66 | for (i=0; i< s->channels; i++) { |
---|
67 | AUBIO_FREE(s->hist[i]); |
---|
68 | } |
---|
69 | AUBIO_FREE(s->hist); |
---|
70 | AUBIO_FREE(s->cent); |
---|
71 | del_aubio_scale(s->scaler); |
---|
72 | AUBIO_FREE(s); |
---|
73 | } |
---|
74 | |
---|
75 | /*** |
---|
76 | * do it |
---|
77 | */ |
---|
78 | void aubio_hist_do (aubio_hist_t *s, fvec_t *input) |
---|
79 | { |
---|
80 | uint_t i,j; |
---|
81 | sint_t tmp = 0; |
---|
82 | aubio_scale_do(s->scaler, input); |
---|
83 | /* reset data */ |
---|
84 | for (i=0; i < s->channels; i++) |
---|
85 | for (j=0; j < s->nelems; j++) |
---|
86 | s->hist[i][j] = 0; |
---|
87 | /* run accum */ |
---|
88 | for (i=0; i < input->channels; i++) |
---|
89 | for (j=0; j < input->length; j++) |
---|
90 | { |
---|
91 | tmp = (sint_t)FLOOR(input->data[i][j]); |
---|
92 | if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) |
---|
93 | s->hist[i][tmp] += 1; |
---|
94 | } |
---|
95 | } |
---|
96 | |
---|
97 | void aubio_hist_do_notnull (aubio_hist_t *s, fvec_t *input) |
---|
98 | { |
---|
99 | uint_t i,j; |
---|
100 | sint_t tmp = 0; |
---|
101 | aubio_scale_do(s->scaler, input); |
---|
102 | /* reset data */ |
---|
103 | for (i=0; i < s->channels; i++) |
---|
104 | for (j=0; j < s->nelems; j++) |
---|
105 | s->hist[i][j] = 0; |
---|
106 | /* run accum */ |
---|
107 | for (i=0; i < input->channels; i++) |
---|
108 | for (j=0; j < input->length; j++) |
---|
109 | { |
---|
110 | if (input->data[i][j] != 0) { |
---|
111 | tmp = (sint_t)FLOOR(input->data[i][j]); |
---|
112 | if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) |
---|
113 | s->hist[i][tmp] += 1; |
---|
114 | } |
---|
115 | } |
---|
116 | } |
---|
117 | |
---|
118 | |
---|
119 | void aubio_hist_dyn_notnull (aubio_hist_t *s, fvec_t *input) |
---|
120 | { |
---|
121 | uint_t i,j; |
---|
122 | sint_t tmp = 0; |
---|
123 | smpl_t ilow = vec_min(input); |
---|
124 | smpl_t ihig = vec_max(input); |
---|
125 | smpl_t step = (ihig-ilow)/(smpl_t)(s->nelems); |
---|
126 | |
---|
127 | /* readapt */ |
---|
128 | aubio_scale_set(s->scaler, ilow, ihig, 0, s->nelems); |
---|
129 | |
---|
130 | /* recalculate centers */ |
---|
131 | s->cent[0] = ilow + 0.5f * step; |
---|
132 | for (i=1; i < s->nelems; i++) |
---|
133 | s->cent[i] = s->cent[0] + i * step; |
---|
134 | |
---|
135 | /* scale */ |
---|
136 | aubio_scale_do(s->scaler, input); |
---|
137 | |
---|
138 | /* reset data */ |
---|
139 | for (i=0; i < s->channels; i++) |
---|
140 | for (j=0; j < s->nelems; j++) |
---|
141 | s->hist[i][j] = 0; |
---|
142 | /* run accum */ |
---|
143 | for (i=0; i < input->channels; i++) |
---|
144 | for (j=0; j < input->length; j++) |
---|
145 | { |
---|
146 | if (input->data[i][j] != 0) { |
---|
147 | tmp = (sint_t)FLOOR(input->data[i][j]); |
---|
148 | if ((tmp >= 0) && (tmp < (sint_t)s->nelems)) |
---|
149 | s->hist[i][tmp] += 1; |
---|
150 | } |
---|
151 | } |
---|
152 | } |
---|
153 | |
---|
154 | void aubio_hist_weigth (aubio_hist_t *s) |
---|
155 | { |
---|
156 | uint_t i,j; |
---|
157 | for (i=0; i < s->channels; i++) |
---|
158 | for (j=0; j < s->nelems; j++) { |
---|
159 | s->hist[i][j] *= s->cent[j]; |
---|
160 | } |
---|
161 | } |
---|
162 | |
---|
163 | smpl_t aubio_hist_mean (aubio_hist_t *s) |
---|
164 | { |
---|
165 | uint_t i,j; |
---|
166 | smpl_t tmp = 0.0f; |
---|
167 | for (i=0; i < s->channels; i++) |
---|
168 | for (j=0; j < s->nelems; j++) |
---|
169 | tmp += s->hist[i][j]; |
---|
170 | return tmp/(smpl_t)(s->nelems); |
---|
171 | } |
---|
172 | |
---|