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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 "m_pd.h"
#include "shared.h"
#include "sickle/sic.h"
#define SLIDE_DEFUP 1.
#define SLIDE_DEFDN 1.
typedef struct _slide
{
t_sic x_sic;
t_float x_last;
} t_slide;
static t_class *slide_class;
static t_int *slide_perform(t_int *w)
{
t_slide *x = (t_slide *)(w[1]);
int nblock = (int)(w[2]);
t_float *in1 = (t_float *)(w[3]);
t_float *in2 = (t_float *)(w[4]);
t_float *in3 = (t_float *)(w[5]);
t_float *out = (t_float *)(w[6]);
t_float last = x->x_last;
while (nblock--)
{
float f = *in1++;
if (f >= last)
{
float up = *in2++;
if (up > 1.) /* CHECKED */
last += (f - last) / up;
else
last = f;
in3++;
}
else if (f < last)
{
float dn = *in3++;
if (dn > 1.) /* CHECKED */
last += (f - last) / dn;
else
last = f;
in2++;
}
*out++ = last;
}
x->x_last = (PD_BIGORSMALL(last) ? 0. : last);
return (w + 7);
}
static void slide_dsp(t_slide *x, t_signal **sp)
{
dsp_add(slide_perform, 6, x, sp[0]->s_n,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec);
}
static void *slide_new(t_symbol *s, int ac, t_atom *av)
{
t_slide *x = (t_slide *)pd_new(slide_class);
sic_inlet((t_sic *)x, 1, SLIDE_DEFUP, 0, ac, av);
sic_inlet((t_sic *)x, 2, SLIDE_DEFDN, 1, ac, av);
outlet_new((t_object *)x, &s_signal);
x->x_last = 0;
return (x);
}
void slide_tilde_setup(void)
{
slide_class = class_new(gensym("slide~"),
(t_newmethod)slide_new, 0,
sizeof(t_slide), 0, A_GIMME, 0);
sic_setup(slide_class, slide_dsp, SIC_FLOATTOSIGNAL);
}
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