1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
/* (C) Guenter Geiger <geiger@epy.co.at> */
/*
(C) Guenter Geiger
based on code by:
(c) Ville Pulkki 2.2.1999
Helsinki University of Technology
Laboratory of Acoustics and Audio Signal Processing
*/
#include <m_pd.h>
#ifdef NT
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
#include <math.h>
#include <stdio.h>
#include <malloc.h>
#include <string.h> /* strtok */
#define MAX_TRIPLET_AMOUNT 64
/* this is related to the number of ls ..
and shoud be 3**(MAX_LS_AMOUNT / 4)
*/
#define MAX_LS_AMOUNT 16
#define MAX_DIM_SQUARE 9
/* ------------------------ vbap ----------------------------- */
static t_class *vbap_class;
typedef struct _vbap
{
t_object x_ob;
t_outlet* x_out2;
t_outlet* x_out3;
t_float lsm[MAX_TRIPLET_AMOUNT][MAX_LS_AMOUNT+1]; /* loudspeaker triplet matrices */
int lstripl[MAX_TRIPLET_AMOUNT][3]; /* loudspeaker triplet ldspeaker numbers */
int lasttrip[3];
int triplet_amount;
int dimension;
int opened;
} t_vbap;
t_float *angle_to_cart(t_float azi, t_float ele);
void vbap(t_vbap* x,t_float g[3], int ls[3], t_float azi, t_float ele) ;
int read_ls_conf(t_vbap* x,FILE *fp );
void vbap_list(t_vbap *x,t_symbol* s,t_int argc,t_atom* argv)
{
t_float azi,ele;
t_float g[3];
int ls[3];
t_atom a[2];
if (argc != 2)
post("vbap: list message <azimuth> <elevation> required %d",argc);
else {
int i;
azi = atom_getfloat(argv++);
ele = atom_getfloat(argv++);
vbap(x,g,ls,azi,ele);
for (i=0;i<x->dimension;i++) {
if (x->lasttrip[i] != ls[i]) {
SETFLOAT(a,(t_float)x->lasttrip[i]);
SETFLOAT(a+1,0.0f);
outlet_list(x->x_ob.ob_outlet, &s_list,2 ,(t_atom*)&a);
x->lasttrip[i] = ls[i];
}
}
for (i=0;i<x->dimension;i++) {
SETFLOAT(a,(t_float)ls[i]);
SETFLOAT(a+1,g[i]);
outlet_list(x->x_ob.ob_outlet, &s_list,2 ,(t_atom*)&a);
}
}
}
void vbap_bang(t_vbap *x)
{
post("vbap: bang");
}
static void *vbap_new(t_symbol* s)
{
FILE *fp;
t_vbap *x = (t_vbap *)pd_new(vbap_class);
char fname[MAXPDSTRING];
if (s == &s_) {
post("vbap: Using default loudspeaker setup");
s = gensym("ls_setup");
}
/* opening the loudspeaker matrix file*/
canvas_makefilename(canvas_getcurrent(),s->s_name,
fname,MAXPDSTRING);
if((fp=fopen(fname,"r"))==NULL){
post("vbap: Could not open loudspeaker data file %s\n",fname);
x->opened = 0;
}
else {
if (!read_ls_conf(x,fp))
return NULL;
x->opened = 1;
fclose(fp);
}
x->lasttrip[0] = 0;
x->lasttrip[1] = 1;
x->lasttrip[2] = 2;
outlet_new(&x->x_ob, &s_list);
return (x);
}
void vbap_setup(void)
{
vbap_class = class_new(gensym("vbap"), (t_newmethod)vbap_new, 0,
sizeof(t_vbap), 0,A_DEFSYM,0);
/* class_addbang(vbap_class,vbap_bang);*/
class_addlist(vbap_class,vbap_list);
}
t_float *angle_to_cart(t_float azi, t_float ele)
{
t_float *res;
t_float atorad = (2 * 3.1415927 / 360) ;
res = (t_float *) malloc(3*sizeof(t_float));
res[0] = (float) (cos((t_float) (azi * atorad)) * cos((t_float) (ele * atorad)));
res[1] = (float) (sin((t_float) (azi * atorad)) * cos((t_float) (ele * atorad)));
res[2] = (float) (sin((t_float) (ele * atorad)));
return res;
}
void vbap(t_vbap* x,t_float g[3], int ls[3], float azi, float ele)
{
/* calculates gain factors using loudspeaker setup and given direction */
t_float *cartdir;
t_float power;
int i,j,k;
t_float small_g;
t_float big_sm_g, gtmp[3];
int winner_triplet;
cartdir=angle_to_cart(azi,ele);
big_sm_g = -100000.0;
for(i=0;i<x->triplet_amount;i++){
small_g = 10000000.0;
for(j=0;j<x->dimension;j++){
gtmp[j]=0.0;
for(k=0;k<x->dimension;k++)
gtmp[j]+=cartdir[k]*x->lsm[i][k+j*x->dimension];
if(gtmp[j] < small_g)
small_g = gtmp[j];
}
if(small_g > big_sm_g){
big_sm_g = small_g;
winner_triplet=i;
g[0]=gtmp[0]; g[1]=gtmp[1];
ls[0]=x->lstripl[i][0]; ls[1]=x->lstripl[i][1];
if(x->dimension==3){
g[2]=gtmp[2];
ls[2]=x->lstripl[i][2];
} else {
g[2]=0.0;
ls[2]=0;
}
}
}
/* this should probably be optimized somehow */
power=sqrt(g[0]*g[0] + g[1]*g[1] + g[2]*g[2]);
/* power=g[0]+g[1];*/
g[0] /= power;
g[1] /= power;
g[2] /= power;
free(cartdir);
}
int read_ls_conf(t_vbap* x,FILE *fp ){
/* reads from specified file the loudspeaker triplet setup */
int amount,i,j,a,b,d=0;
char *toke;
char c[1000];
t_float mx[MAX_DIM_SQUARE];
fgets(c,1000,fp);
toke = (char *) strtok(c, " ");
toke = (char *) strtok(NULL, " ");
toke = (char *) strtok(NULL, " ");
if((toke = (char *) strtok(NULL, " "))==NULL){
fprintf(stderr,"Wrong ls matrix file?\n");
return 0;
}
sscanf(toke, "%d",&amount);
toke = (char *) strtok(NULL, " ");
toke = (char *) strtok(NULL, " ");
if((toke = (char *) strtok(NULL, " "))==NULL){
fprintf(stderr,"Wrong ls matrix file?\n");
return 0;
}
sscanf(toke, "%d",&x->dimension);
x->triplet_amount = amount;
for(i=0;i<amount;i++){
fgets(c,1000,fp);
toke = (char *) strtok(c, " ");
if(strncmp(toke,"Trip",4)!=0 && x->dimension==3){
fprintf(stderr,"Something wrong in ls matrix file\n");
return 0;
}
if(strncmp(toke,"Pair",4)!=0 && x->dimension==2){
fprintf(stderr,"Something wrong in ls matrix file\n");
return 0;
}
toke = (char *) strtok(NULL, " ");
toke = (char *) strtok(NULL, " "); toke = (char *) strtok(NULL, " ");
sscanf(toke, "%d",&a);
x->lstripl[i][0]=a;
toke = (char *) strtok(NULL, " ");
sscanf(toke, "%d",&b);
x->lstripl[i][1]=b;
if (x->dimension==3){
toke = (char *) strtok(NULL, " ");
sscanf(toke, "%d",&d);
x->lstripl[i][2]=d;
}
toke = (char *) strtok(NULL, " ");
for(j=0;j<(x->dimension*x->dimension);j++){
toke = (char *) strtok(NULL, " ");
sscanf(toke, "%f",&(mx[j]));
x->lsm[i][j]=mx[j];
}
}
return 1;
}
|
