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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. */
/* CHECKED negative float in 2nd inlet: "illegal slope value %f",
but no complaints for signal input -- this is impossible in Pd.
The only thing we could do (and a bit stupid one) would be to
clock this exception out from the perf routine. */
#include "m_pd.h"
#include "sickle/sic.h"
#define KINK_DEFSLOPE 1.0
typedef t_sic t_kink;
static t_class *kink_class;
static t_int *kink_perform(t_int *w)
{
int nblock = (int)(w[1]);
t_float *in1 = (t_float *)(w[2]);
t_float *in2 = (t_float *)(w[3]);
t_float *out = (t_float *)(w[4]);
while (nblock--)
{
float iph = *in1++;
float slope = *in2++;
float oph = iph * slope;
if (oph > .5)
{
slope = 1. / (slope + slope); /* x(y=.5) */
if (slope == 1.)
*out++ = 0; /* CHECKED */
else
*out++ = (iph - slope) / (2. - (slope + slope)) + .5;
}
else *out++ = oph;
}
return (w + 5);
}
static void kink_dsp(t_kink *x, t_signal **sp)
{
dsp_add(kink_perform, 4, sp[0]->s_n,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
}
static void *kink_new(t_symbol *s, int ac, t_atom *av)
{
t_kink *x = (t_kink *)pd_new(kink_class);
sic_inlet((t_sic *)x, 1, KINK_DEFSLOPE, 0, ac, av);
outlet_new((t_object *)x, &s_signal);
return (x);
}
void kink_tilde_setup(void)
{
kink_class = class_new(gensym("kink~"),
(t_newmethod)kink_new, 0,
sizeof(t_kink), 0, A_GIMME, 0);
sic_setup(kink_class, kink_dsp, SIC_FLOATTOSIGNAL);
}
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