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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 <string.h>
#include "m_pd.h"
#include "common/grow.h"
#define THRESH_INISIZE 32 /* LATER rethink */
#define THRESH_MAXSIZE 256
#define THRESH_DEFTHRESH 10
typedef struct _thresh
{
t_object x_ob;
t_float x_thresh;
int x_size; /* as allocated */
int x_natoms; /* as used */
t_atom *x_message;
t_atom x_messini[THRESH_INISIZE];
t_clock *x_clock;
} t_thresh;
static t_class *thresh_class;
static void thresh_tick(t_thresh *x)
{
int ac = x->x_natoms;
if (ac)
{
t_atom *av = x->x_message;
if (av->a_type == A_FLOAT) /* redundant, but we might need it LATER */
{
if (ac > 1)
outlet_list(((t_object *)x)->ob_outlet, &s_list, ac, av);
else
outlet_float(((t_object *)x)->ob_outlet, av->a_w.w_float);
}
x->x_natoms = 0;
}
}
static void thresh_anything(t_thresh *x, t_symbol *s, int ac, t_atom *av)
{
int ntotal = x->x_natoms + ac;
t_atom *buf;
clock_unset(x->x_clock);
if (s == &s_) s = 0;
if (s)
ntotal++;
if (ntotal > x->x_size)
{
/* LATER if (ntotal > THRESH_MAXSIZE)... (cf prepend) */
int nrequested = ntotal;
x->x_message = grow_withdata(&nrequested, &x->x_natoms,
&x->x_size, x->x_message,
THRESH_INISIZE, x->x_messini,
sizeof(*x->x_message));
if (nrequested != ntotal)
{
x->x_natoms = 0;
if (ac >= x->x_size)
ac = (s ? x->x_size - 1 : x->x_size);
}
}
buf = x->x_message + x->x_natoms;
if (s)
{
SETSYMBOL(buf, s);
buf++;
x->x_natoms++;
}
if (ac)
{
memcpy(buf, av, ac * sizeof(*buf));
x->x_natoms += ac;
}
clock_delay(x->x_clock, x->x_thresh);
}
static void thresh_float(t_thresh *x, t_float f)
{
t_atom at;
SETFLOAT(&at, f);
thresh_anything(x, 0, 1, &at);
}
static void thresh_list(t_thresh *x, t_symbol *s, int ac, t_atom *av)
{
thresh_anything(x, 0, ac, av);
}
static void thresh_ft1(t_thresh *x, t_floatarg f)
{
if (f < 0)
f = 0; /* CHECKED */
x->x_thresh = f;
/* CHECKED: no rearming */
}
static void thresh_free(t_thresh *x)
{
if (x->x_message != x->x_messini)
freebytes(x->x_message, x->x_size * sizeof(*x->x_message));
if (x->x_clock)
clock_free(x->x_clock);
}
static void *thresh_new(t_floatarg f)
{
t_thresh *x = (t_thresh *)pd_new(thresh_class);
x->x_thresh = (f > 0 ? f : THRESH_DEFTHRESH);
x->x_size = THRESH_INISIZE;
x->x_natoms = 0;
x->x_message = x->x_messini;
inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
outlet_new((t_object *)x, &s_list); /* LATER rethink: list or float */
x->x_clock = clock_new(x, (t_method)thresh_tick);
return (x);
}
void thresh_setup(void)
{
thresh_class = class_new(gensym("thresh"),
(t_newmethod)thresh_new,
(t_method)thresh_free,
sizeof(t_thresh), 0,
A_DEFFLOAT, 0);
class_addfloat(thresh_class, thresh_float);
class_addlist(thresh_class, thresh_list);
class_addmethod(thresh_class, (t_method)thresh_ft1,
gensym("ft1"), A_FLOAT, 0);
/* CHECKED: thresh: doesn't understand bang, symbol, anything */
}
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