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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include <math.h>
#include "m_pd.h"
#include "shared.h"
#include "sickle/sic.h"
typedef struct _phasewrap
{
t_sic x_sic;
int x_algo;
} t_phasewrap;
static t_class *phasewrap_class;
static t_int *phasewrap_perform(t_int *w)
{
int nblock = (int)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
t_shared_wrappy wrappy;
while (nblock--)
{
/* FIXME here we have pi -> pi, 3pi -> -pi, -pi -> -pi, -3pi -> pi,
while in msp it is pi -> -pi, 3pi -> -pi, -pi -> pi, -3pi -> pi */
double dnorm = *in++ * (1. / SHARED_2PI);
wrappy.w_d = dnorm + SHARED_UNITBIT0;
/* Speeding up the int-to-double conversion below would be nice,
but all attempts failed. Even this is slower (which works only
for nonnegative input):
wrappy.w_i[SHARED_HIOFFSET] = SHARED_UNITBIT0_HIPART;
*out++ = (dnorm - (wrappy.w_d - SHARED_UNITBIT0)) * SHARED_2PI;
*/
dnorm -= wrappy.w_i[SHARED_LOWOFFSET];
*out++ = dnorm * SHARED_2PI;
}
return (w + 4);
}
/* This is the slowest algo. It is slower than fmod in all cases,
except for input being zero. */
static t_int *phasewrap_perform1(t_int *w)
{
int nblock = (int)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
while (nblock--)
{
float f = *in++;
double dnorm;
if (f < -SHARED_PI)
{
dnorm = (double)f * (1. / SHARED_2PI) + .5;
*out++ = (dnorm - (int)dnorm) * SHARED_2PI + SHARED_PI;
}
else if (f > SHARED_PI)
{
dnorm = (double)f * (1. / SHARED_2PI) + .5;
*out++ = (dnorm - (int)dnorm) * SHARED_2PI - SHARED_PI;
}
else *out++ = f;
}
return (w + 4);
}
static t_int *phasewrap_perform2(t_int *w)
{
int nblock = (int)(w[1]);
t_float *in = (t_float *)(w[2]);
t_float *out = (t_float *)(w[3]);
while (nblock--)
{
double dnorm = *in++ + SHARED_PI;
if (dnorm < 0)
*out++ = SHARED_PI - fmod(-dnorm, SHARED_2PI);
else
*out++ = fmod(dnorm, SHARED_2PI) - SHARED_PI;
}
return (w + 4);
}
static void phasewrap_dsp(t_phasewrap *x, t_signal **sp)
{
switch (x->x_algo)
{
case 1:
dsp_add(phasewrap_perform1, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
break;
case 2:
dsp_add(phasewrap_perform2, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
break;
default:
dsp_add(phasewrap_perform, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
}
}
static void phasewrap__algo(t_phasewrap *x, t_floatarg f)
{
x->x_algo = f;
}
static void *phasewrap_new(t_symbol *s, int ac, t_atom *av)
{
t_phasewrap *x = (t_phasewrap *)pd_new(phasewrap_class);
if (s == gensym("_phasewrap1~"))
x->x_algo = 1;
else if (s == gensym("_phasewrap2~"))
x->x_algo = 2;
else
x->x_algo = 0;
outlet_new((t_object *)x, &s_signal);
return (x);
}
void phasewrap_tilde_setup(void)
{
phasewrap_class = class_new(gensym("phasewrap~"),
(t_newmethod)phasewrap_new, 0,
sizeof(t_phasewrap), 0, A_GIMME, 0);
class_addcreator((t_newmethod)phasewrap_new,
gensym("_phasewrap1~"), A_GIMME, 0);
class_addcreator((t_newmethod)phasewrap_new,
gensym("_phasewrap2~"), A_GIMME, 0);
sic_setup(phasewrap_class, phasewrap_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(phasewrap_class, (t_method)phasewrap__algo,
gensym("_algo"), A_FLOAT, 0);
}
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