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
|
/* Copyright (c) 2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include "sickle/sic.h"
#define ZEROX_DEFVOLUME 1.
typedef struct _zerox
{
t_sic x_sic;
t_float x_volume;
int x_lastsign;
} t_zerox;
static t_class *zerox_class;
static void zerox_set(t_zerox *x, t_floatarg f)
{
x->x_volume = f; /* CHECKED anything goes (including 0.) */
}
static t_int *zerox_perform(t_int *w)
{
t_zerox *x = (t_zerox *)(w[1]);
int nblock = (int)(w[2]);
t_float *in = (t_float *)(w[3]);
t_float *out1 = (t_float *)(w[4]);
t_float *out2 = (t_float *)(w[5]);
t_float volume = x->x_volume;
int lastsign = x->x_lastsign;
int i = nblock;
int count = 0;
t_float fcount;
while (i--)
{
/* CHECKED -1 -> 0 and 0 -> -1 are hits, 1 -> 0, 0 -> 1 are not */
int sign = (*in++ < 0 ? 1. : 0.); /* LATER read the sign bit */
if (sign != lastsign)
{
count++;
*out2++ = volume;
lastsign = sign;
}
else *out2++ = 0.;
}
fcount = (t_float)count;
while (nblock--) *out1++ = fcount;
x->x_lastsign = lastsign;
return (w + 6);
}
static void zerox_dsp(t_zerox *x, t_signal **sp)
{
dsp_add(zerox_perform, 5, x, sp[0]->s_n,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
}
static void *zerox_new(t_floatarg f)
{
t_zerox *x = (t_zerox *)pd_new(zerox_class);
x->x_volume = (f == 0. ? ZEROX_DEFVOLUME : f);
x->x_lastsign = 0; /* CHECKED the very first sample hits if negative */
outlet_new((t_object *)x, &s_signal);
outlet_new((t_object *)x, &s_signal);
return (x);
}
void zerox_tilde_setup(void)
{
zerox_class = class_new(gensym("zerox~"),
(t_newmethod)zerox_new, 0,
sizeof(t_zerox), 0, A_DEFFLOAT, 0);
sic_setup(zerox_class, zerox_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(zerox_class, (t_method)zerox_set,
gensym("set"), A_FLOAT, 0); /* CHECKED arg obligatory */
}
|
