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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 DELTACLIP_DEFLO 0.
#define DELTACLIP_DEFHI 0.
typedef struct _deltaclip
{
t_sic x_sic;
t_float x_last;
} t_deltaclip;
static t_class *deltaclip_class;
static t_int *deltaclip_perform(t_int *w)
{
t_deltaclip *x = (t_deltaclip *)(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++;
float delta = f - last;
float lo = *in2++;
float hi = *in3++;
if (delta < lo)
f = last + lo;
else if (delta > hi)
f = last + hi;
*out++ = last = f;
}
x->x_last = last;
return (w + 7);
}
static void deltaclip_dsp(t_deltaclip *x, t_signal **sp)
{
dsp_add(deltaclip_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 *deltaclip_new(t_symbol *s, int ac, t_atom *av)
{
t_deltaclip *x = (t_deltaclip *)pd_new(deltaclip_class);
sic_inlet((t_sic *)x, 1, DELTACLIP_DEFLO, 0, ac, av);
sic_inlet((t_sic *)x, 2, DELTACLIP_DEFHI, 1, ac, av);
outlet_new((t_object *)x, &s_signal);
x->x_last = 0;
return (x);
}
void deltaclip_tilde_setup(void)
{
deltaclip_class = class_new(gensym("deltaclip~"),
(t_newmethod)deltaclip_new, 0,
sizeof(t_deltaclip), 0, A_GIMME, 0);
sic_setup(deltaclip_class, deltaclip_dsp, SIC_FLOATTOSIGNAL);
}
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