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/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
iemlib2 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2008 */
#include "m_pd.h"
#include "iemlib.h"
/* ------------------------ aspeedlim --------------------------- */
/* -- reduces the flow of anything-messages to one message per -- */
/* -------------------- time interval in ms --------------------- */
struct _aspeedlim_proxy;
static t_class *aspeedlim_class;
static t_class *aspeedlim_proxy_class;
typedef struct _aspeedlim
{
t_object x_obj;
struct _aspeedlim_proxy *x_proxy_inlet;
t_clock *x_clock;
float x_delay;
int x_output_is_locked;
int x_there_was_n_event;
int x_size;
int x_ac;
t_atom *x_at;
t_symbol *x_selector_sym;
} t_aspeedlim;
typedef struct _aspeedlim_proxy
{
t_object p_obj;
t_aspeedlim *p_owner;
} t_aspeedlim_proxy;
static void aspeedlim_atcopy(t_atom *src, t_atom *dst, int n)
{
while(n--)
*dst++ = *src++;
}
static void aspeedlim_proxy_stop(t_aspeedlim_proxy *p)
{
t_aspeedlim *x = p->p_owner;
x->x_output_is_locked = 0;
x->x_there_was_n_event = 0;
clock_unset(x->x_clock);
}
static void aspeedlim_proxy_delay(t_aspeedlim_proxy *p, t_floatarg delay)
{
t_aspeedlim *x = p->p_owner;
if(delay < 0.0)
delay = 0.0;
x->x_delay = delay;
}
static void aspeedlim_tick(t_aspeedlim *x)
{
if(x->x_there_was_n_event)
{
x->x_output_is_locked = 1;
x->x_there_was_n_event = 0;
outlet_anything(x->x_obj.ob_outlet, x->x_selector_sym, x->x_ac, x->x_at);
clock_delay(x->x_clock, x->x_delay);
}
else
{
x->x_output_is_locked = 0;
x->x_there_was_n_event = 0;
}
}
static void aspeedlim_anything(t_aspeedlim *x, t_symbol *s, int ac, t_atom *av)
{
if(ac > x->x_size)
{
x->x_at = (t_atom *)resizebytes(x->x_at, x->x_size*sizeof(t_atom), (10 + ac)*sizeof(t_atom));
x->x_size = 10 + ac;
}
x->x_ac = ac;
x->x_selector_sym = s;
aspeedlim_atcopy(av, x->x_at, ac);
if(!x->x_output_is_locked)
{
x->x_output_is_locked = 1;
x->x_there_was_n_event = 0;
outlet_anything(x->x_obj.ob_outlet, x->x_selector_sym, x->x_ac, x->x_at);
clock_delay(x->x_clock, x->x_delay);
}
else
x->x_there_was_n_event = 1;
}
static void aspeedlim_free(t_aspeedlim *x)
{
clock_free(x->x_clock);
if(x->x_at)
freebytes(x->x_at, x->x_size * sizeof(t_atom));
if(x->x_proxy_inlet)
pd_free((t_pd *)x->x_proxy_inlet);
}
static void *aspeedlim_new(t_floatarg delay)
{
t_aspeedlim *x = (t_aspeedlim *)pd_new(aspeedlim_class);
t_aspeedlim_proxy *p = (t_aspeedlim_proxy *)pd_new(aspeedlim_proxy_class);
x->x_proxy_inlet = p;
p->p_owner = x;
x->x_size = 10;
x->x_at = (t_atom *)getbytes(x->x_size * sizeof(t_atom));
x->x_ac = 0;
x->x_selector_sym = &s_bang;
if(delay < 0.0)
delay = 0.0;
x->x_delay = delay;
x->x_output_is_locked = 0;
x->x_there_was_n_event = 0;
x->x_clock = clock_new(x, (t_method)aspeedlim_tick);
inlet_new((t_object *)x, (t_pd *)p, 0, 0);
outlet_new(&x->x_obj, &s_list);
return (x);
}
void aspeedlim_setup(void)
{
aspeedlim_class = class_new(gensym("aspeedlim"), (t_newmethod)aspeedlim_new,
(t_method)aspeedlim_free, sizeof(t_aspeedlim), 0, A_DEFFLOAT, 0);
class_addanything(aspeedlim_class, aspeedlim_anything);
aspeedlim_proxy_class = class_new(gensym("_aspeedlim_proxy"), 0, 0, sizeof(t_aspeedlim_proxy), CLASS_PD | CLASS_NOINLET, 0);
class_addmethod(aspeedlim_proxy_class, (t_method)aspeedlim_proxy_stop, gensym("stop"), 0);
class_addfloat(aspeedlim_proxy_class, (t_method)aspeedlim_proxy_delay);
}
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