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/* --------------------- vthreshold ----------------------------- */
#include "defines.h"
#include "memory.h"
static t_class *vthreshold_class;
typedef struct _vthreshold
{
t_object x_obj;
t_outlet *x_outlet1; /* bang out for high thresh */
t_outlet *x_outlet2; /* bang out for low thresh */
int *x_state; /* 1 = high, 0 = low */
int x_n;
t_float x_hithresh; /* value of high vthreshold */
t_float x_lothresh; /* value of low vthreshold */
t_float x_hideadtime; /* hi dead */
t_float x_lodeadtime; /* lo dead */
} t_vthreshold;
/* "set" message to specify vthresholds and dead times */
static void vthreshold_set(t_vthreshold *x,
t_floatarg hithresh, t_floatarg hideadtime,
t_floatarg lothresh, t_floatarg lodeadtime,
t_floatarg nf)
{
if (lothresh > hithresh)
lothresh = hithresh;
x->x_hithresh = hithresh;
x->x_hideadtime = hideadtime;
x->x_lothresh = lothresh;
x->x_lodeadtime = lodeadtime;
freebytes(x->x_state,x->x_n);
x->x_n=(int)nf;
x->x_state = (int *)getbytes(sizeof(int)*x->x_n);
memset(x->x_state , 0, x->x_n);
}
static t_vthreshold *vthreshold_new(t_floatarg hithresh,
t_floatarg hideadtime, t_floatarg lothresh, t_floatarg lodeadtime, t_floatarg n)
{
t_vthreshold *x = (t_vthreshold *)
pd_new(vthreshold_class);
x->x_state = 0; /* low state */
x->x_outlet1 = outlet_new(&x->x_obj, gensym("float"));
x->x_outlet2 = outlet_new(&x->x_obj, gensym("float"));
vthreshold_set(x, hithresh, hideadtime, lothresh, lodeadtime, n);
return (x);
}
static void vthreshold_free(t_vthreshold *x)
{
freebytes(x->x_state,x->x_n);
}
static void vthreshold_perform(t_vthreshold *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
int *state;
state=x->x_state;
if (argc>x->x_n) argc=x->x_n;
for (i=0;i<argc;i++)
{
t_float f;
f=atom_getfloat(argv++);
if (*state<0)
{
if (f>x->x_hithresh)
{
outlet_float(x->x_outlet1, (t_float)i); // on
*state=1;
}
}
else
{
if (f<x->x_lothresh)
{
outlet_float(x->x_outlet2, (t_float)i); // off
*state=-1;
}
}
state++;
}
}
static void vthreshold_ff(t_vthreshold *x)
{
freebytes(x->x_state,x->x_n);
}
void vthreshold_setup( void)
{
vthreshold_class = class_new(gensym("vthreshold"),
(t_newmethod)vthreshold_new, (t_method)vthreshold_free,
sizeof(t_vthreshold), 0,
A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addlist(vthreshold_class, (t_method)vthreshold_perform);
class_addmethod(vthreshold_class, (t_method)vthreshold_set,
gensym("set"), A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, 0);
// class_addmethod(vthreshold_class, (t_method)vthreshold_ft1,
// gensym("ft1"), A_FLOAT, 0);
}
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