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
|
#include "../src/m_pd.h"
#include "../src/m_fixed.h"
/* -------------------------- phasor~ ------------------------------ */
static t_class *phasor_class;
typedef struct _phasor
{
t_object x_obj;
unsigned int x_phase;
t_sample x_conv;
t_sample x_f; /* scalar frequency */
} t_phasor;
static void *phasor_new(t_floatarg f)
{
t_phasor *x = (t_phasor *)pd_new(phasor_class);
x->x_f = ftofix(f);
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
x->x_phase = 0;
x->x_conv = 0;
outlet_new(&x->x_obj, gensym("signal"));
return (x);
}
static t_int *phasor_perform(t_int *w)
{
t_phasor *x = (t_phasor *)(w[1]);
t_sample *in = (t_sample *)(w[2]);
t_sample *out = (t_sample *)(w[3]);
int n = (int)(w[4]);
unsigned int phase = x->x_phase;
int conv = x->x_conv;
while (n--) {
phase+= mult(conv , (*in++));
phase &= (itofix(1) - 1);
*out++ = phase;
}
x->x_phase = phase;
return (w+5);
}
static void phasor_dsp(t_phasor *x, t_signal **sp)
{
x->x_conv = ftofix(1000.)/sp[0]->s_sr;
x->x_conv = mult(x->x_conv + 500,ftofix(0.001));
dsp_add(phasor_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
static void phasor_ft1(t_phasor *x, t_float f)
{
x->x_phase = ftofix(f);
}
void phasor_tilde_setup(void)
{
phasor_class = class_new(gensym("phasor~"), (t_newmethod)phasor_new, 0,
sizeof(t_phasor), 0, A_DEFFLOAT, 0);
CLASS_MAINSIGNALIN(phasor_class, t_phasor, x_f);
class_addmethod(phasor_class, (t_method)phasor_dsp, gensym("dsp"), 0);
class_addmethod(phasor_class, (t_method)phasor_ft1,
gensym("ft1"), A_FLOAT, 0);
class_sethelpsymbol(phasor_class, gensym("osc~-help.pd"));
}
|
