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/* 3009:forum::für::umläute:2000 */
/* -------------------- drip ------------------------------ */
/*
unfold a parallel data-structure (*pack*age) into a sequence
like a medical drip
you can adjust the drop-speed in [ms]
*/
#include "zexy.h"
static t_class *drip_class;
typedef struct _drip
{
t_object x_obj;
t_atom *buffer, *current;
int bufsize;
t_clock *x_clock;
float deltime;
int flush;
} t_drip;
static void drip_makebuffer(t_drip *x, int n, t_atom *list)
{
if (x->buffer) {
freebytes(x->buffer, x->bufsize * sizeof(t_atom));
x->buffer = 0;
x->bufsize = 0;
}
x->buffer = copybytes(list, n * sizeof(t_atom));
x->bufsize = n;
x->current = x->buffer;
}
static void drip_bang(t_drip *x)
{ outlet_bang(x->x_obj.ob_outlet);}
static void drip_all(t_drip *x, int argc, t_atom *argv)
{
while (argc--) {
switch (argv->a_type) {
case A_FLOAT:
outlet_float(x->x_obj.ob_outlet, atom_getfloat(argv));
break;
case A_SYMBOL:
outlet_symbol(x->x_obj.ob_outlet, atom_getsymbol(argv));
break;
case A_POINTER:
outlet_pointer(x->x_obj.ob_outlet, argv->a_w.w_gpointer);
break;
default:
outlet_bang(x->x_obj.ob_outlet);
}
argv++;
}
}
static void drip_tick(t_drip *x)
{
switch (x->current->a_type) {
case A_FLOAT:
outlet_float(x->x_obj.ob_outlet, atom_getfloat(x->current));
break;
case A_SYMBOL:
outlet_symbol(x->x_obj.ob_outlet, atom_getsymbol(x->current));
break;
case A_POINTER:
outlet_pointer(x->x_obj.ob_outlet, x->current->a_w.w_gpointer);
break;
case A_NULL:
outlet_bang(x->x_obj.ob_outlet);
default:
break;
}
if (x->current + 1 >= x->buffer + x->bufsize) { /* ok, we're done */
clock_unset(x->x_clock);
x->current = 0;
} else { /* do it again */
x->current++;
clock_delay(x->x_clock, x->deltime);
}
}
static void drip_list(t_drip *x, t_symbol *s, int argc, t_atom *argv)
{
if (x->flush && x->current) { /* do we want to flush */
drip_all(x, x->bufsize - (x->current - x->buffer), x->current);
}
if (x->deltime >= 0.f) { /* do we want to SCHEDULE ? */
/* outlet the first element */
switch (argv->a_type) {
case (A_FLOAT):
outlet_float(x->x_obj.ob_outlet, atom_getfloat(argv));
break;
case (A_SYMBOL):
outlet_symbol(x->x_obj.ob_outlet, atom_getsymbol(argv));
break;
case (A_POINTER):
outlet_pointer(x->x_obj.ob_outlet, argv->a_w.w_gpointer);
break;
default:
outlet_bang(x->x_obj.ob_outlet);
}
/* create a buffer and copy the remaining list into it */
drip_makebuffer(x, argc-1, argv+1);
/* set the clock and start */
clock_delay(x->x_clock, x->deltime);
} else { /* UNSCHEDULED */
drip_all(x, argc, argv);
}
}
static void drip_anything(t_drip *x, t_symbol *s, int argc, t_atom *argv)
{
if (x->flush && x->current) { /* do we want to flush */
drip_all(x, x->bufsize - (x->current - x->buffer), x->current);
}
/* outlet the first element */
outlet_symbol(x->x_obj.ob_outlet, s);
if (x->deltime >= 0.f) { /* do we want to SCHEDULE ? */
/* create a buffer and copy the remaining list into it */
drip_makebuffer(x, argc, argv);
/* set the clock and start */
clock_delay(x->x_clock, x->deltime);
} else { /* UNSCHEDULED */
drip_all(x, argc, argv);
}
}
static void drip_free(t_drip *x)
{
clock_free(x->x_clock);
if (x->buffer) {
freebytes(x->buffer, x->bufsize * sizeof(t_atom));
x->buffer = 0;
x->bufsize = 0;
}
}
static void *drip_new(t_symbol *s, int argc, t_atom *argv)
{
t_drip *x = (t_drip *)pd_new(drip_class);
if (argc>1) x->flush = 1;
else x->flush = 0;
if (argc) x->deltime = atom_getfloat(argv);
else x->deltime = -1.f;
if (x->deltime < 0.f) x->deltime = -1.0;
x->x_clock = clock_new(x, (t_method)drip_tick);
floatinlet_new(&x->x_obj, &x->deltime);
outlet_new(&x->x_obj, 0);
return (x);
}
void z_drip_setup(void)
{
drip_class = class_new(gensym("drip"), (t_newmethod)drip_new,
(t_method)drip_free, sizeof(t_drip), 0 ,A_GIMME, 0);
class_addcreator((t_newmethod)drip_new, gensym("unfold"), A_GIMME, 0);
/* for historical reasons */
class_addbang (drip_class, drip_bang);
class_addlist (drip_class, drip_list);
class_addanything(drip_class, drip_anything);
class_sethelpsymbol(drip_class, gensym("zexy/drip"));
}
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