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/***************************************************************************
* File: pol2rec~.c
* Auth: Iain Mott [iain.mott@bigpond.com]
* Maintainer: Iain Mott [iain.mott@bigpond.com]
* Version: Part of motex_1.1.2
* Date: January 2001
*
* Description: Pd signal external. Converts polar coordinates into rectangular coordinates.
* Used in conjuction with rec2pol~ (also in motex) and rfft~
*
* Copyright (C) 2001 by Iain Mott [iain.mott@bigpond.com]
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License, which should be included with this
* program, for more details.
*
****************************************************************************/
#include "m_pd.h"
#include <math.h>
static t_class *pol2rec_class;
#define HALFPI 1.570796327
#define PI 3.141592654
#define PIHALF 4.71238898
typedef struct _pol2rec
{
t_object x_obj;
float x_f;
float pol2rec;
float left;
float right;
} t_pol2rec;
static void *pol2rec_new(t_symbol *s, int argc, t_atom *argv)
{
t_pol2rec *x = (t_pol2rec *)pd_new(pol2rec_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
outlet_new(&x->x_obj, gensym("signal"));
outlet_new(&x->x_obj, gensym("signal"));
x->x_f = 0;
return (x);
}
/* static void pol2rec_doit(t_float phase, t_float mag, double *x, double *y) */
/* { */
/* *x = mag*cos(phase); */
/* *y = mag*sin(phase); */
/* } */
static t_int *pol2rec_perform8(t_int *w)
{
t_float *in1 = (t_float *)(w[1]);
t_float *in2 = (t_float *)(w[2]);
t_float *out1 = (t_float *)(w[3]);
t_float *out2 = (t_float *)(w[4]);
int n = (int)(w[5]);
for (; n; n -= 8, in1 += 8, out1 += 8, in2 += 8, out2 += 8)
{
t_float p0 = in1[0], p1 = in1[1], p2 = in1[2], p3 = in1[3];
t_float p4 = in1[4], p5 = in1[5], p6 = in1[6], p7 = in1[7];
t_float m0 = in2[0], m1 = in2[1], m2 = in2[2], m3 = in2[3];
t_float m4 = in2[4], m5 = in2[5], m6 = in2[6], m7 = in2[7];
out1[0] = m0*cos(p0);
out1[1] = m1*cos(p1);
out1[2] = m2*cos(p2);
out1[3] = m3*cos(p3);
out1[4] = m4*cos(p4);
out1[5] = m5*cos(p5);
out1[6] = m6*cos(p6);
out1[7] = m7*cos(p7);
out2[0] = m0*sin(p0);
out2[1] = m1*sin(p1);
out2[2] = m2*sin(p2);
out2[3] = m3*sin(p3);
out2[4] = m4*sin(p4);
out2[5] = m5*sin(p5);
out2[6] = m6*sin(p6);
out2[7] = m7*sin(p7);
}
return (w+6);
}
static t_int *pol2rec_perform(t_int *w)
{
float *in1 = (t_float *)(w[1]);
float *in2 = (t_float *)(w[2]);
float *out1 = (t_float *)(w[3]);
float *out2 = (t_float *)(w[4]);
int n = (int)(w[5]);
double phase, mag, x, y;
while (n--)
{
phase = *in1++; mag = *in2++;
*out1++ = mag*cos(phase);
*out2++ = mag*sin(phase);;
}
return (w+6);
}
static void pol2rec_dsp(t_pol2rec *x, t_signal **sp)
{
int n = sp[0]->s_n;
float *in1 = sp[0]->s_vec;
float *in2 = sp[1]->s_vec;
float *out1 = sp[2]->s_vec;
float *out2 = sp[3]->s_vec;
if (n&7)
{
dsp_add(pol2rec_perform, 5, in1, in2, out1, out2, n);
post("it's a seven");
}
else
dsp_add(pol2rec_perform8, 5, in1, in2, out1, out2, n);
}
void pol2rec_tilde_setup(void)
{
pol2rec_class = class_new(gensym("pol2rec~"), (t_newmethod)pol2rec_new, 0,
sizeof(t_pol2rec), 0, A_GIMME, 0);
class_addmethod(pol2rec_class, nullfn, gensym("signal"), 0);
class_addmethod(pol2rec_class, (t_method)pol2rec_dsp, gensym("dsp"), 0);
CLASS_MAINSIGNALIN(pol2rec_class, t_pol2rec, x_f);
}
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