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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/* Copyright (c) 2002-2003 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 TRAPEZOID_DEFUP 0.1 /* a bug? */
#define TRAPEZOID_DEFDN 0.9 /* a bug? */
#define TRAPEZOID_DEFLO 0.0
#define TRAPEZOID_DEFHI 1.0
typedef struct _trapezoid
{
t_sic x_sic;
float x_low;
float x_range;
} t_trapezoid;
static t_class *trapezoid_class;
static void trapezoid_lo(t_trapezoid *x, t_floatarg f)
{
float high = x->x_low + x->x_range;
x->x_low = f;
x->x_range = high - x->x_low;
}
static void trapezoid_hi(t_trapezoid *x, t_floatarg f)
{
x->x_range = f - x->x_low;
}
/* LATER optimize */
static t_int *trapezoid_perform(t_int *w)
{
t_trapezoid *x = (t_trapezoid *)(w[1]);
int nblock = (int)(w[2]);
t_float *in1 = (t_float *)(w[3]);
t_float *in2 = (t_float *)(w[4]);
t_float *in3 = (t_float *)(w[5]);
t_float *out = (t_float *)(w[6]);
float low = x->x_low;
float range = x->x_range;
while (nblock--)
{
float ph = *in1++;
float upph = *in2++;
float dnph = *in3++;
/* CHECKED ph wrapped */
if (ph < 0.)
ph -= (int)ph - 1.;
else if (ph > 1.)
ph -= (int)ph;
/* CHECKED upph, dnph clipped */
if (upph < 0.)
upph = 0.;
else if (upph > 1.) /* CHECKME */
upph = 1.;
if (dnph < upph)
dnph = upph;
else if (dnph > 1.)
dnph = 1.;
if (ph < upph)
ph /= upph;
else if (ph < dnph)
ph = 1.;
else if (dnph < 1.)
ph = (1. - ph) / (1. - dnph);
else
ph = 0.;
*out++ = low + ph * range;
}
return (w + 7);
}
static void trapezoid_dsp(t_trapezoid *x, t_signal **sp)
{
dsp_add(trapezoid_perform, 6, x, sp[0]->s_n,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec);
}
static void *trapezoid_new(t_symbol *s, int ac, t_atom *av)
{
t_trapezoid *x = (t_trapezoid *)pd_new(trapezoid_class);
sic_inlet((t_sic *)x, 1, TRAPEZOID_DEFUP, 0, ac, av);
sic_inlet((t_sic *)x, 2, TRAPEZOID_DEFDN, 1, ac, av);
outlet_new((t_object *)x, &s_signal);
x->x_low = TRAPEZOID_DEFLO;
x->x_range = (TRAPEZOID_DEFHI - TRAPEZOID_DEFLO);
return (x);
}
void trapezoid_tilde_setup(void)
{
trapezoid_class = class_new(gensym("trapezoid~"),
(t_newmethod)trapezoid_new, 0,
sizeof(t_trapezoid), 0, A_GIMME, 0);
sic_setup(trapezoid_class, trapezoid_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(trapezoid_class, (t_method)trapezoid_lo,
gensym("lo"), A_DEFFLOAT, 0); /* CHECKME */
class_addmethod(trapezoid_class, (t_method)trapezoid_hi,
gensym("hi"), A_DEFFLOAT, 0); /* CHECKME */
}
|
