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/* pipelist.c 20070711 Martin Peach based on pipe from x_time.c */
#include "m_pd.h"
/* -------------------------- pipe -------------------------- */
static t_class *pipelist_class;
typedef struct _hang
{
t_clock *h_clock;
struct _hang *h_next;
struct _pipelist *h_owner;
int h_n; /* number of atoms in h_list */
t_atom *h_atoms; /* pointer to a list of h_n t_atoms */
} t_hang;
typedef struct _pipelist
{
t_object x_obj;
float x_deltime;
t_outlet *x_pipelistout;
t_hang *x_hang;
} t_pipelist;
static void *pipelist_new(t_symbol *s, int argc, t_atom *argv);
static void pipelist_hang_free(t_hang *h);
static void pipelist_hang_tick(t_hang *h);
static void pipelist_list(t_pipelist *x, t_symbol *s, int ac, t_atom *av);
static void pipelist_flush(t_pipelist *x);
static void pipelist_clear(t_pipelist *x);
void pipelist_setup(void);
static void *pipelist_new(t_symbol *s, int argc, t_atom *argv)
{
t_pipelist *x = (t_pipelist *)pd_new(pipelist_class);
float deltime;
if (argc)
{ /* We accept one argument to set the delay time, ignore any further args */
if (argv[0].a_type != A_FLOAT)
{
char stupid[80];
atom_string(&argv[argc-1], stupid, 79);
post("pipelist: %s: bad time delay value", stupid);
deltime = 0;
}
else deltime = argv[argc-1].a_w.w_float;
}
else deltime = 0;
x->x_pipelistout = outlet_new(&x->x_obj, &s_list);
floatinlet_new(&x->x_obj, &x->x_deltime);
x->x_hang = NULL;
x->x_deltime = deltime;
return (x);
}
static void pipelist_hang_free(t_hang *h)
{
freebytes(h->h_atoms, h->h_n*sizeof(t_atom));
clock_free(h->h_clock);
freebytes(h, sizeof(t_hang));
}
static void pipelist_hang_tick(t_hang *h)
{
t_pipelist *x = h->h_owner;
t_hang *h2, *h3;
/* excise h from the linked list of hangs */
if (x->x_hang == h) x->x_hang = h->h_next;
else for (h2 = x->x_hang; ((h3 = h2->h_next)!=NULL); h2 = h3)
{
if (h3 == h)
{
h2->h_next = h3->h_next;
break;
}
}
/* output h's list */
outlet_list(x->x_pipelistout, &s_list, h->h_n, h->h_atoms);
/* free h */
pipelist_hang_free(h);
}
static void pipelist_list(t_pipelist *x, t_symbol *s, int ac, t_atom *av)
{
if (x->x_deltime > 0)
{ /* if delay is real, save the list for output in delay milliseconds */
t_hang *h;
int i;
h = (t_hang *)getbytes(sizeof(t_hang));
h->h_n = ac;
h->h_atoms = (t_atom *)getbytes(h->h_n*sizeof(t_atom));
for (i = 0; i < h->h_n; ++i)
h->h_atoms[i] = av[i];
h->h_next = x->x_hang;
x->x_hang = h;
h->h_owner = x;
h->h_clock = clock_new(h, (t_method)pipelist_hang_tick);
clock_delay(h->h_clock, (x->x_deltime >= 0 ? x->x_deltime : 0));
}
/* otherwise just pass the list straight through */
else outlet_list(x->x_pipelistout, &s_list, ac, av);
}
static void pipelist_flush(t_pipelist *x)
{
while (x->x_hang) pipelist_hang_tick(x->x_hang);
}
static void pipelist_clear(t_pipelist *x)
{
t_hang *hang;
while ((hang = x->x_hang) != NULL)
{
x->x_hang = hang->h_next;
pipelist_hang_free(hang);
}
}
void pipelist_setup(void)
{
pipelist_class = class_new(gensym("pipelist"),
(t_newmethod)pipelist_new, (t_method)pipelist_clear,
sizeof(t_pipelist), 0, A_GIMME, 0);
class_addlist(pipelist_class, pipelist_list);
class_addmethod(pipelist_class, (t_method)pipelist_flush, gensym("flush"), 0);
class_addmethod(pipelist_class, (t_method)pipelist_clear, gensym("clear"), 0);
}
/* end of pipelist.c*/
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