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#include "../src/m_pd.h"
#include "../src/m_fixed.h"
typedef struct sigsamphold
{
t_object x_obj;
t_sample x_f;
t_sample x_lastin;
t_sample x_lastout;
} t_sigsamphold;
t_class *sigsamphold_class;
static void *sigsamphold_new(void)
{
t_sigsamphold *x = (t_sigsamphold *)pd_new(sigsamphold_class);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
outlet_new(&x->x_obj, gensym("signal"));
x->x_lastin = 0;
x->x_lastout = 0;
x->x_f = 0;
return (x);
}
static t_int *sigsamphold_perform(t_int *w)
{
t_sample *in1 = (t_sample *)(w[1]);
t_sample *in2 = (t_sample *)(w[2]);
t_sample *out = (t_sample *)(w[3]);
t_sigsamphold *x = (t_sigsamphold *)(w[4]);
int n = (t_int)(w[5]);
int i;
t_sample lastin = x->x_lastin;
t_sample lastout = x->x_lastout;
for (i = 0; i < n; i++, in1++)
{
t_sample next = *in2++;
if (next < lastin) lastout = *in1;
*out++ = lastout;
lastin = next;
}
x->x_lastin = lastin;
x->x_lastout = lastout;
return (w+6);
}
static void sigsamphold_dsp(t_sigsamphold *x, t_signal **sp)
{
dsp_add(sigsamphold_perform, 5,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec,
x, sp[0]->s_n);
}
static void sigsamphold_reset(t_sigsamphold *x)
{
x->x_lastin = 0x7fffffff;
}
static void sigsamphold_set(t_sigsamphold *x, t_float f)
{
x->x_lastout = f;
}
void samphold_tilde_setup(void)
{
sigsamphold_class = class_new(gensym("samphold~"),
(t_newmethod)sigsamphold_new, 0, sizeof(t_sigsamphold), 0, 0);
CLASS_MAINSIGNALIN(sigsamphold_class, t_sigsamphold, x_f);
class_addmethod(sigsamphold_class, (t_method)sigsamphold_set,
gensym("set"), A_FLOAT, 0);
class_addmethod(sigsamphold_class, (t_method)sigsamphold_reset,
gensym("reset"), 0);
class_addmethod(sigsamphold_class, (t_method)sigsamphold_dsp,
gensym("dsp"), 0);
}
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