1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#include "defines.h"
/*--------------- vlmin -----------------------*/
/* leaky minimum of each element in a list */
/* arguments: [halfdecay] */
static t_class *vlmin_class;
typedef struct _vlmin
{
t_object x_obj;
t_float m_c_leak;
t_float m_leak;
t_float *m_min;
int m_n;
} t_vlmin;
static void vlmin_perform(t_vlmin *x, t_symbol *s, int argc, t_atom *argv)
{
int i;
t_atom *ap,*app;
t_float *fp;
t_float m_leak;
t_float m_c_leak;
m_leak=x->m_leak;
m_c_leak=x->m_c_leak;
if (argc!=x->m_n)
{
if (x->m_min)
freebytes(x->m_min,x->m_n);
x->m_min=(t_float*)getbytes(argc*sizeof(t_float));
for(i=0;i<argc;i++)
x->m_min[i]=0.0;
x->m_n=argc;
}
fp=x->m_min;
ap = (t_atom *)getbytes(sizeof(t_atom)*argc);
app=ap;
for (i = 0; i < argc; i++)
{
t_float f=atom_getfloat(argv++);
*fp =(f < *fp ) ? f : *fp *m_c_leak + f*m_leak;
SETFLOAT(app, *fp);
app++;
fp++;
}
outlet_list(x->x_obj.ob_outlet,gensym("list"),argc,ap);
freebytes(ap,argc);
if (s) {} // prevent compiler complaint
}
static void vlmin_setHalfDecay(t_vlmin *x, t_floatarg halfDecayTime)
{
if (halfDecayTime <= 1.) halfDecayTime = 1;
x->m_c_leak=(t_float)powf(.5,(1.0/halfDecayTime));
x->m_leak=1.0-x->m_c_leak;
}
static void *vlmin_new(t_float halfDecayTime)
{
t_vlmin *x=(t_vlmin *)pd_new(vlmin_class);
outlet_new(&x->x_obj, gensym("list"));
vlmin_setHalfDecay(x, halfDecayTime);
x->m_n=0;
x->m_min=0;
return (void *)x;
}
static void vlmin_free(t_vlmin *x)
{
freebytes(x->m_min,x->m_n);
}
void vlmin_setup(void)
{
vlmin_class = class_new(gensym("vlmin"),
(t_newmethod)vlmin_new, (t_method)vlmin_free,
sizeof(t_vlmin),
CLASS_DEFAULT,
A_DEFFLOAT, 0);
class_addmethod(vlmin_class, (t_method)vlmin_setHalfDecay,
gensym("decay"), A_DEFFLOAT, NULL);
class_addlist(vlmin_class, (t_method)vlmin_perform);
}
|
