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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iem_ambi written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006 */
#include "m_pd.h"
#include "iemlib.h"
#include <math.h>
/* -------------------------- ambi_encode ------------------------------ */
typedef struct _ambi_encode
{
t_object x_obj;
t_atom *x_at;
int x_size;
int x_size2d;
int x_size3d;
t_float x_sqrt3;
t_float x_sqrt10_4;
t_float x_sqrt15;
t_float x_sqrt6_4;
t_float x_sqrt35_2;
t_float x_sqrt70_4;
t_float x_sqrt5_2;
t_float x_sqrt126_16;
t_float x_sqrt315_2;
t_float x_sqrt105_2;
t_float x_pi_over_180;
t_float *x_ambi_order_weight;
int x_colrow;
int x_n_order;
} t_ambi_encode;
static t_class *ambi_encode_class;
static void ambi_encode_ambi_weight(t_ambi_encode *x, t_symbol *s, int argc, t_atom *argv)
{
if(argc > x->x_n_order)
{
int i, n=x->x_n_order;
for(i=0; i<=n; i++)
{
x->x_ambi_order_weight[i] = atom_getfloat(argv++);
}
}
else
post("ambi_encode-ERROR: ambi_weight needs %d float weights", x->x_n_order+1);
}
static void ambi_encode_do_2d(t_ambi_encode *x, t_floatarg phi)
{
t_float c, s, cc, ss, c2, s2, c3, s3, s4, c4, s5, c5, s6, c6;
t_float *awght = x->x_ambi_order_weight;
t_atom *at=x->x_at;
phi *= x->x_pi_over_180;
c = cos(phi);
s = sin(phi);
cc = c*c;
ss = s*s;
SETFLOAT(at, (t_float)x->x_colrow);
at++;
SETFLOAT(at, awght[0]);
at++;
SETFLOAT(at, c*awght[1]);
at++;
SETFLOAT(at, s*awght[1]);
at++;
if(x->x_n_order >= 2)
{
c2 = cc - ss;
s2 = 2.0f*s*c;
SETFLOAT(at, c2*awght[2]);
at++;
SETFLOAT(at, s2*awght[2]);
at++;
if(x->x_n_order >= 3)
{
c3 = c*(4.0f*cc - 3.0f);
s3 = s*(3.0f - 4.0f*ss);
SETFLOAT(at, c3*awght[3]);
at++;
SETFLOAT(at, s3*awght[3]);
at++;
if(x->x_n_order >= 4)
{
c4 = 1.0f + 8.0f*cc*(cc - 1.0f);
s4 = 2.0f*s2*c2;
SETFLOAT(at, c4*awght[4]);
at++;
SETFLOAT(at, s4*awght[4]);
at++;
if(x->x_n_order >= 5)
{
c5 = c*(1.0f + 4.0f*ss*(ss - 3.0f*cc));
s5 = s*(1.0f + 4.0f*cc*(cc - 3.0f*ss));
SETFLOAT(at, c5*awght[5]);
at++;
SETFLOAT(at, s5*awght[5]);
at++;
if(x->x_n_order >= 6)
{
c6 = c3*c3 - s3*s3;
s6 = 2.0f*s3*c3;
SETFLOAT(at, c6*awght[6]);
at++;
SETFLOAT(at, s6*awght[6]);
at++;
if(x->x_n_order >= 7)
{
SETFLOAT(at, cos(7.0f*phi)*awght[7]);
at++;
SETFLOAT(at, sin(7.0f*phi)*awght[7]);
at++;
if(x->x_n_order >= 8)
{
SETFLOAT(at, (c4*c4 - s4*s4)*awght[8]);
at++;
SETFLOAT(at, 2.0f*s4*c4*awght[8]);
at++;
if(x->x_n_order >= 9)
{
SETFLOAT(at, cos(9.0f*phi)*awght[9]);
at++;
SETFLOAT(at, sin(9.0f*phi)*awght[9]);
at++;
if(x->x_n_order >= 10)
{
SETFLOAT(at, (c5*c5 - s5*s5)*awght[10]);
at++;
SETFLOAT(at, 2.0f*s5*c5*awght[10]);
at++;
if(x->x_n_order >= 11)
{
SETFLOAT(at, cos(11.0f*phi)*awght[11]);
at++;
SETFLOAT(at, sin(11.0f*phi)*awght[11]);
at++;
if(x->x_n_order >= 12)
{
SETFLOAT(at, (c6*c6 - s6*s6)*awght[12]);
at++;
SETFLOAT(at, 2.0f*s6*c6*awght[12]);
}
if(x->x_n_order >= 13)
post("ambi_encode-ERROR: do not support Ambisonic-Order greater than 12 in 2d !!!");
}
}
}
}
}
}
}
}
}
}
}
static void ambi_encode_do_3d(t_ambi_encode *x, t_symbol *s, int argc, t_atom *argv)
{
t_float delta, phi;
t_float cd, x1, y, z, x2, y2, z2, x2my2, x2m3y2, p3x2my2, xy, xz, yz, m1p5z2, m1p7z2, m3p7z2;
t_float *awght = x->x_ambi_order_weight;
t_atom *at=x->x_at;
delta = atom_getfloat(argv++)*x->x_pi_over_180;
phi = atom_getfloat(argv)*x->x_pi_over_180;
cd = cos(delta);
x1 = cd * cos(phi);
y = cd * sin(phi);
z = sin(delta);
xy = x1*y;
xz = x1*z;
yz = y*z;
x2 = x1*x1;
y2 = y*y;
z2 = z*z;
x2my2 = x2 - y2;
x2m3y2 = x2my2 - 2.0f*y2;
p3x2my2 = 2.0f*x2 + x2my2;
m1p5z2 = 5.0f*z2 - 1.0f;
m1p7z2 = 2.0f*z2 + m1p5z2;
m3p7z2 = m1p7z2 - 2.0f;
SETFLOAT(at, (t_float)x->x_colrow);
at++;
SETFLOAT(at, awght[0]);
at++;
SETFLOAT(at, x1*awght[1]);
at++;
SETFLOAT(at, y*awght[1]);
at++;
SETFLOAT(at, z*awght[1]);
at++;
if(x->x_n_order >= 2)
{
SETFLOAT(at, 0.5f*x->x_sqrt3*x2my2*awght[2]);
at++;
SETFLOAT(at, x->x_sqrt3*xy*awght[2]);
at++;
SETFLOAT(at, x->x_sqrt3*xz*awght[2]);
at++;
SETFLOAT(at, x->x_sqrt3*yz*awght[2]);
at++;
SETFLOAT(at, 0.5f*(3.0f*z2 - 1.0f)*awght[2]);
at++;
if(x->x_n_order >= 3)
{
SETFLOAT(at, x->x_sqrt10_4*x1*x2m3y2*awght[3]);
at++;
SETFLOAT(at, x->x_sqrt10_4*y*p3x2my2*awght[3]);
at++;
SETFLOAT(at, 0.5f*x->x_sqrt15*z*x2my2*awght[3]);
at++;
SETFLOAT(at, x->x_sqrt15*xy*z*awght[3]);
at++;
SETFLOAT(at, x->x_sqrt6_4*x1*m1p5z2*awght[3]);
at++;
SETFLOAT(at, x->x_sqrt6_4*y*m1p5z2*awght[3]);
at++;
SETFLOAT(at, 0.5f*z*(m1p5z2 - 2.0f)*awght[3]);
at++;
if(x->x_n_order >= 4)
{
SETFLOAT(at, 0.25f*x->x_sqrt35_2*(x2my2*x2my2 - 4.0f*x2*y2)*awght[4]);
at++;
SETFLOAT(at, x->x_sqrt35_2*xy*x2my2*awght[4]);
at++;
SETFLOAT(at, x->x_sqrt70_4*xz*x2m3y2*awght[4]);
at++;
SETFLOAT(at, x->x_sqrt70_4*yz*p3x2my2*awght[4]);
at++;
SETFLOAT(at, 0.5f*x->x_sqrt5_2*x2my2*m1p7z2*awght[4]);
at++;
SETFLOAT(at, x->x_sqrt5_2*xy*m1p7z2*awght[4]);
at++;
SETFLOAT(at, x->x_sqrt10_4*xz*m3p7z2*awght[4]);
at++;
SETFLOAT(at, x->x_sqrt10_4*yz*m3p7z2*awght[4]);
at++;
SETFLOAT(at, 0.125f*(5.0f*(z2 - 1.0f)*(m1p7z2 + 2.0f) + 8.0f)*awght[4]);
at++;
if(x->x_n_order >= 5)
{
SETFLOAT(at, x->x_sqrt126_16*x1*(x2*(x2 - 10.0f*y2) + 5.0f*y2*y2)*awght[5]);
at++;
SETFLOAT(at, x->x_sqrt126_16*y*(y2*(y2 - 10.0f*x2) + 5.0f*x2*x2)*awght[5]);
at++;
SETFLOAT(at, 0.25f*x->x_sqrt315_2*z*(y2*(y2 - 6.0f*x2) + x2*x2)*awght[5]);
at++;
SETFLOAT(at, x->x_sqrt315_2*xy*z*x2my2*awght[5]);
at++;
SETFLOAT(at, 0.25f*x->x_sqrt70_4*x1*(9.0f*z2 - 1.0f)*x2m3y2*awght[5]);
at++;
SETFLOAT(at, 0.25f*x->x_sqrt70_4*y*(9.0f*z2 - 1.0f)*p3x2my2*awght[5]);
at++;
SETFLOAT(at, 0.5f*x->x_sqrt105_2*x2my2*z*(3.0f*z2 - 1.0f)*awght[5]);
at++;
SETFLOAT(at, x->x_sqrt105_2*xy*z*(3.0f*z2 - 1.0f)*awght[5]);
at++;
SETFLOAT(at, 0.125f*x->x_sqrt15*x1*(z2*(21.0f*z2 - 14.0f) + 1.0f)*awght[5]);
at++;
SETFLOAT(at, 0.125f*x->x_sqrt15*y*(z2*(21.0f*z2 - 14.0f) + 1.0f)*awght[5]);
at++;
SETFLOAT(at, 0.125f*z*(z2*(63.0f*z2 - 70.0f) + 15.0f)*awght[5]);
}
if(x->x_n_order > 5)
post("ambi_encode-ERROR: do not support Ambisonic-Order greater than 5 in 3d !!!");
}
}
}
}
static void ambi_encode_float(t_ambi_encode *x, t_floatarg phi)
{
x->x_colrow = -1;
ambi_encode_do_2d(x, phi);
outlet_list(x->x_obj.ob_outlet, &s_list, x->x_size2d, x->x_at+1);
}
static void ambi_encode_list(t_ambi_encode *x, t_symbol *s, int argc, t_atom *argv)
{
if(argc <= 0)
{
post("ambi_encode ERROR: list-input needs 2 angles: delta [rad] and phi [rad]");
return;
}
else if(argc == 1)
{
ambi_encode_float(x, atom_getfloat(argv));
}
else
{
x->x_colrow = -1;
ambi_encode_do_3d(x, &s_list, 2, argv);
outlet_list(x->x_obj.ob_outlet, &s_list, x->x_size3d, x->x_at+1);
}
}
static void ambi_encode_row(t_ambi_encode *x, t_symbol *s, int argc, t_atom *argv)
{
if(argc == 2)
{
x->x_colrow = (int)atom_getint(argv++);
ambi_encode_do_2d(x, atom_getfloat(argv));
outlet_anything(x->x_obj.ob_outlet, s, x->x_size2d+1, x->x_at);
}
else if(argc >= 3)
{
x->x_colrow = (int)atom_getint(argv++);
ambi_encode_do_3d(x, &s_list, 2, argv);
outlet_anything(x->x_obj.ob_outlet, s, x->x_size3d+1, x->x_at);
}
else
{
post("ambi_encode-ERROR: row needs <float> row-index + <float> angle ( + <float> angle)");
}
}
static void ambi_encode_col(t_ambi_encode *x, t_symbol *s, int argc, t_atom *argv)
{
if(argc == 2)
{
x->x_colrow = (int)atom_getint(argv++);
ambi_encode_do_2d(x, atom_getfloat(argv));
outlet_anything(x->x_obj.ob_outlet, s, x->x_size2d+1, x->x_at);
}
else if(argc >= 3)
{
x->x_colrow = (int)atom_getint(argv++);
ambi_encode_do_3d(x, &s_list, 2, argv);
outlet_anything(x->x_obj.ob_outlet, s, x->x_size3d+1, x->x_at);
}
else
{
post("ambi_encode-ERROR: col needs <float> col-index + <float> angle ( + <float> angle)");
}
}
static void ambi_encode_free(t_ambi_encode *x)
{
freebytes(x->x_ambi_order_weight, (x->x_n_order+1) * sizeof(t_float));
freebytes(x->x_at, x->x_size * sizeof(t_atom));
}
static void *ambi_encode_new(t_floatarg forder)
{
t_ambi_encode *x = (t_ambi_encode *)pd_new(ambi_encode_class);
t_atom *at;
int i=(int)forder;
if(i < 1)
i = 1;
if(i > 12)
i = 12;
x->x_n_order = i;
x->x_size = 6*6 + 1;
x->x_size2d = 2*i + 1;
x->x_size3d = (i + 1)*(i + 1);
x->x_sqrt3 = (t_float)(sqrt(3.0));
x->x_sqrt5_2 = (t_float)(sqrt(5.0) / 2.0);
x->x_sqrt6_4 = (t_float)(sqrt(6.0) / 4.0);
x->x_sqrt10_4 = (t_float)(sqrt(10.0) / 4.0);
x->x_sqrt15 = (t_float)(sqrt(15.0));
x->x_sqrt35_2 = (t_float)(sqrt(35.0) / 2.0);
x->x_sqrt70_4 = (t_float)(sqrt(70.0) / 4.0);
x->x_sqrt126_16 = (t_float)(sqrt(126.0) / 16.0);
x->x_sqrt315_2 = (t_float)(sqrt(315.0) / 2.0);
x->x_sqrt105_2 = (t_float)(sqrt(105.0) / 2.0);
x->x_pi_over_180 = (t_float)(4.0 * atan(1.0)/180.0);
x->x_colrow = 0;
x->x_ambi_order_weight = (t_float *)getbytes((x->x_n_order+1) * sizeof(t_float));
x->x_at = (t_atom *)getbytes(x->x_size * sizeof(t_atom));
at=x->x_at;
SETFLOAT(at, -1.0f);/*row index*/
at++;
SETFLOAT(at, 1.0f);/*W channel*/
for(i=0; i<=x->x_n_order; i++)
x->x_ambi_order_weight[i] = 1.0f;
outlet_new(&x->x_obj, &s_list);
return (x);
}
void ambi_encode_setup(void)
{
ambi_encode_class = class_new(gensym("ambi_encode"), (t_newmethod)ambi_encode_new, (t_method)ambi_encode_free,
sizeof(t_ambi_encode), 0, A_DEFFLOAT, 0);
class_addlist(ambi_encode_class, (t_method)ambi_encode_list);
class_addfloat(ambi_encode_class, (t_method)ambi_encode_float);
class_addmethod(ambi_encode_class, (t_method)ambi_encode_row, gensym("row"), A_GIMME, 0);
class_addmethod(ambi_encode_class, (t_method)ambi_encode_col, gensym("col"), A_GIMME, 0);
class_addmethod(ambi_encode_class, (t_method)ambi_encode_ambi_weight, gensym("ambi_weight"), A_GIMME, 0);
// class_sethelpsymbol(ambi_encode_class, gensym("iemhelp2/ambi_encode-help"));
}
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