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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 - 2005 */
#include "m_pd.h"
#include "iemlib.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
/* --------------------------- bpe -------------------------------- */
/* -- break-point-envelope, convert a list of value-time-doubles -- */
/* ------- into a time-scheduled stream of value-time-pairs ------- */
static t_class *bpe_class;
typedef struct _bpe
{
t_object x_obj;
t_clock *x_clock;
int x_maxnum;
int x_curnum;
int x_curindex;
t_atom *x_beg;
void *x_out_val;
void *x_out_time;
void *x_out_finished;
} t_bpe;
static void bpe_stop(t_bpe *x)
{
clock_unset(x->x_clock);
}
static void bpe_tick(t_bpe *x)
{
t_atom *vec = x->x_beg;
float val, time;
if(x->x_curindex >= x->x_curnum)
{
bpe_stop(x);
outlet_bang(x->x_out_finished);
}
else
{
vec += x->x_curindex;
val = atom_getfloat(vec++);
time = atom_getfloat(vec);
outlet_float(x->x_out_time, time);
outlet_float(x->x_out_val, val);
x->x_curindex += 2;
clock_delay(x->x_clock, time);
}
}
static void bpe_bang(t_bpe *x)
{
t_atom *vec = x->x_beg;
float val, time;
if(x->x_curnum)
{
x->x_curindex = 2;
val = atom_getfloat(vec++);
time = atom_getfloat(vec);
outlet_float(x->x_out_time, time);
outlet_float(x->x_out_val, val);
clock_delay(x->x_clock, time);
}
}
static void bpe_list(t_bpe *x, t_symbol *s, int ac, t_atom *av)
{
int n = ac & 0xfffffffe, i;
t_atom *vec = x->x_beg;
if(n > x->x_maxnum)
{
freebytes(x->x_beg, x->x_maxnum*sizeof(t_atom));
x->x_maxnum = 2 + n;
x->x_beg = (t_atom *)getbytes(x->x_maxnum*sizeof(t_atom));
vec = x->x_beg;
}
x->x_curnum = n;
for(i=0; i<n; i++)
{
*vec++ = *av++;
}
}
static void bpe_free(t_bpe *x)
{
freebytes(x->x_beg, x->x_maxnum*sizeof(t_atom));
clock_free(x->x_clock);
}
static void *bpe_new(void)
{
t_bpe *x = (t_bpe *)pd_new(bpe_class);
x->x_curindex = 0;
x->x_maxnum = 20;
x->x_curnum = 0;
x->x_beg = (t_atom *)getbytes(x->x_maxnum*sizeof(t_atom));
x->x_clock = clock_new(x, (t_method)bpe_tick);
x->x_out_val = outlet_new(&x->x_obj, &s_float);
x->x_out_time = outlet_new(&x->x_obj, &s_float);
x->x_out_finished = outlet_new(&x->x_obj, &s_bang);
return (x);
}
void bpe_setup(void)
{
bpe_class = class_new(gensym("bpe"), (t_newmethod)bpe_new,
(t_method)bpe_free, sizeof(t_bpe), 0, 0);
class_addmethod(bpe_class, (t_method)bpe_stop, gensym("stop"), 0);
class_addbang(bpe_class, bpe_bang);
class_addlist(bpe_class, (t_method)bpe_list);
class_sethelpsymbol(bpe_class, gensym("iemhelp/help-bpe"));
}
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