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/***************************************************************************
* File: rec2pol~.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 rectangular coordinates to polar.
* Used to convert sine & cosine output of 'rfft~' object to phase and magnitude values.
* Used in conjunction with pol2rec~ external in motex
* See supporting Pd patch: rec2pol~.pd & polcoc~.pd
*
* 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 *rec2pol_class;
typedef struct _rec2pol
{
t_object x_obj;
float x_f;
} t_rec2pol;
static void *rec2pol_new(t_symbol *s, int argc, t_atom *argv)
{
t_rec2pol *x = (t_rec2pol *)pd_new(rec2pol_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);
}
/* t_int *sigsqrt_perform(t_int *w); */
static t_int *rec2pol_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 X0 = in1[0], X1 = in1[1], X2 = in1[2], X3 = in1[3];
t_float X4 = in1[4], X5 = in1[5], X6 = in1[6], X7 = in1[7];
t_float Y0 = in2[0], Y1 = in2[1], Y2 = in2[2], Y3 = in2[3];
t_float Y4 = in2[4], Y5 = in2[5], Y6 = in2[6], Y7 = in2[7];
out1[0] = atan2(Y0, X0);
out1[1] = atan2(Y1, X1);
out1[2] = atan2(Y2, X2);
out1[3] = atan2(Y3, X3);
out1[4] = atan2(Y4, X4);
out1[5] = atan2(Y5, X5);
out1[6] = atan2(Y6, X6);
out1[7] = atan2(Y7, X7);
out2[0] = X0*X0 + Y0*Y0;
out2[1] = X1*X1 + Y1*Y1;
out2[2] = X2*X2 + Y2*Y2;
out2[3] = X3*X3 + Y3*Y3;
out2[4] = X4*X4 + Y4*Y4;
out2[5] = X5*X5 + Y5*Y5;
out2[6] = X6*X6 + Y6*Y6;
out2[7] = X7*X7 + Y7*Y7;
}
return (w+6);
}
static t_int *rec2pol_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]);
float x, y;
// double angle;
while (n--)
{
x = *in1++;
y = *in2++;
*out1++ = atan2(y, x);
*out2++ = x*x + y*y;
}
return (w+6);
}
static void rec2pol_dsp(t_rec2pol *x, t_signal **sp)
{
int n = sp[0]->s_n;
/* int n2 = (n>>1); */
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(rec2pol_perform, 5, in1, in2, out1, out2, n);
else
dsp_add(rec2pol_perform8, 5, in1, in2, out1, out2, n);
/* dsp_add(sigsqrt_perform, 3, out2, out2, n); */
}
void rec2pol_tilde_setup(void)
{
rec2pol_class = class_new(gensym("rec2pol~"), (t_newmethod)rec2pol_new, 0,
sizeof(t_rec2pol), 0, A_GIMME, 0);
class_addmethod(rec2pol_class, nullfn, gensym("signal"), 0);
class_addmethod(rec2pol_class, (t_method)rec2pol_dsp, gensym("dsp"), 0);
CLASS_MAINSIGNALIN(rec2pol_class, t_rec2pol, x_f);
}
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