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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 "sickle/sic.h"
typedef struct _spike
{
t_sic x_sic;
t_float x_last;
int x_count;
int x_precount;
int x_nwait;
float x_waittime;
float x_ksr;
float x_rcpksr;
t_clock *x_clock;
} t_spike;
static t_class *spike_class;
static void spike_tick(t_spike *x)
{
outlet_float(((t_object *)x)->ob_outlet, x->x_count * x->x_rcpksr);
x->x_count = x->x_precount;
}
static void spike_ft1(t_spike *x, t_floatarg f)
{
if ((x->x_waittime = f) < 0.)
x->x_waittime = 0.;
x->x_nwait = (int)(x->x_waittime * x->x_ksr);
}
static t_int *spike_perform(t_int *w)
{
t_spike *x = (t_spike *)(w[1]);
int nblock = (int)(w[2]);
t_float *in = (t_float *)(w[3]);
t_float last = x->x_last;
int count = x->x_count;
int nwait = x->x_nwait;
if (count + nblock > nwait)
{
/* LATER efficiency tricks */
while (nblock--)
{
float f = *in++;
if (last == 0. && f != 0. /* CHECKED zero-to-nonzero */
&& count /* CHECKED no firing at startup */
&& count >= nwait)
{
clock_delay(x->x_clock, 0);
x->x_last = in[nblock - 1];
x->x_count = count;
x->x_precount = nblock;
return (w + 4);
}
count++;
last = f;
}
x->x_last = last;
x->x_count = count;
}
else
{
x->x_last = in[nblock - 1];
x->x_count += nblock;
}
return (w + 4);
}
static void spike_dsp(t_spike *x, t_signal **sp)
{
x->x_ksr = sp[0]->s_sr * 0.001;
x->x_rcpksr = 1000.0 / sp[0]->s_sr;
x->x_nwait = (int)(x->x_waittime * x->x_ksr);
dsp_add(spike_perform, 3, x, sp[0]->s_n, sp[0]->s_vec);
}
static void spike_free(t_spike *x)
{
if (x->x_clock) clock_free(x->x_clock);
}
static void *spike_new(t_floatarg f)
{
t_spike *x = (t_spike *)pd_new(spike_class);
x->x_last = 0.;
x->x_ksr = sys_getsr() * 0.001;
spike_ft1(x, f);
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
outlet_new((t_object *)x, &s_float);
x->x_clock = clock_new(x, (t_method)spike_tick);
return (x);
}
void spike_tilde_setup(void)
{
spike_class = class_new(gensym("spike~"),
(t_newmethod)spike_new,
(t_method)spike_free,
sizeof(t_spike), 0,
A_DEFFLOAT, 0);
sic_setup(spike_class, spike_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(spike_class, (t_method)spike_ft1,
gensym("ft1"), A_FLOAT, 0);
}
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