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/* (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 _MSC_VER
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
#include <math.h>
#include <stdio.h>
#ifndef __APPLE__
#include <malloc.h>
#endif
#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;
}
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