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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
#include <m_pd.h>
#include <math.h>
#include <stdio.h> // fprintf
/* ------------------------- tabwrite4~ -------------------------- */
static t_class *tabwrite4_tilde_class;
typedef struct _tabwrite4_tilde
{
t_object x_obj;
int x_phase;
int x_npoints;
float *x_vec;
t_symbol *x_arrayname;
float x_f;
t_sample x_1;
t_sample x_2;
t_sample x_3;
t_sample x_4;
float x_index;
} t_tabwrite4_tilde;
static void tabwrite4_tilde_tick(t_tabwrite4_tilde *x);
static void *tabwrite4_tilde_new(t_symbol *s)
{
t_tabwrite4_tilde *x = (t_tabwrite4_tilde *)pd_new(tabwrite4_tilde_class);
x->x_phase = 0x7fffffff;
x->x_arrayname = s;
x->x_f = 0;
x->x_1 = 0.;
x->x_2 = 0.;
x->x_3 = 0.;
inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_signal, &s_signal);
outlet_new(&x->x_obj, &s_signal);
return (x);
}
static void tabwrite4_tilde_redraw(t_tabwrite4_tilde *x)
{
t_garray *a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class);
if (!a)
bug("tabwrite4_tilde_redraw");
else garray_redraw(a);
}
static t_int *tabwrite4_tilde_perform(t_int *w)
{
t_tabwrite4_tilde *x = (t_tabwrite4_tilde *)(w[1]);
t_float *in1 = (t_float *)(w[2]);
t_float *in2 = (t_float *)(w[3]);
int n = (int)(w[4]);
t_float* end = in1 + n;
t_float* end2 = in2 + n;
float *buf = x->x_vec, *fp, a,b,c,d;
float findex = *in2;
float frac;
int iindex = (int)findex;
int wraparound = 0;
int maxindex = x->x_npoints-1;
if (!buf) return (w+5);
b = x->x_1;
c = x->x_2;
d = x->x_3;
while (n--)
{
float cminusb;
findex = *in2++;
#if 0
while ((int)findex > iindex) {
iindex++;
*(buf+iindex) = *(buf+iindex-1);
}
#endif
iindex = (int)findex;
// post("iindex %d, findex %f",iindex,findex);
if (in2 < end2 && findex > *in2) {
wraparound = 1;
post("wraparound");
}
a=b;
b=c;
c=d;
d = *in1++;
frac = findex - iindex;
iindex +=64; // one blocksize and 4 points
if (iindex < 0) {
iindex += maxindex+1;
}
else if (iindex > maxindex) {
iindex -= maxindex;
}
fp = buf + iindex;
cminusb = c-b;
*fp = b + frac * (
cminusb - 0.1666667f * (1.-frac) * (
(d - a - 3.0f * cminusb) * frac + (d + 2.0f*a - 3.0f*b)
)
);
}
post("written to %d",iindex);
x->x_1 = b;
x->x_2 = c;
x->x_3 = d;
#if 0
buf[maxindex-2] = buf[maxindex-3]*0.5;
buf[maxindex-1] = buf[maxindex-2]*0.5;
buf[maxindex] = buf[maxindex-1]*0.5;
buf[2] = buf[3]*0.5;
buf[1] = buf[2]*0.5;
buf[0] = buf[1]*0.5;
#endif
if (wraparound) tabwrite4_tilde_redraw(x);
return (w+5);
}
void tabwrite4_tilde_set(t_tabwrite4_tilde *x, t_symbol *s)
{
t_garray *a;
x->x_arrayname = s;
if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
{
if (*s->s_name) pd_error(x, "tabwrite4~: %s: no such array",
x->x_arrayname->s_name);
x->x_vec = 0;
}
else if (!garray_getfloatarray(a, &x->x_npoints, &x->x_vec))
{
pd_error(x, "%s: bad template for tabwrite4~", x->x_arrayname->s_name);
x->x_vec = 0;
}
else garray_usedindsp(a);
}
static void tabwrite4_tilde_dsp(t_tabwrite4_tilde *x, t_signal **sp)
{
tabwrite4_tilde_set(x, x->x_arrayname);
dsp_add(tabwrite4_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
}
static void tabwrite4_tilde_bang(t_tabwrite4_tilde *x)
{
x->x_phase = 0;
}
static void tabwrite4_tilde_start(t_tabwrite4_tilde *x, t_floatarg f)
{
x->x_phase = (f > 0 ? f : 0);
}
static void tabwrite4_tilde_stop(t_tabwrite4_tilde *x)
{
if (x->x_phase != 0x7fffffff)
{
tabwrite4_tilde_redraw(x);
x->x_phase = 0x7fffffff;
}
}
void tabwrite4_tilde_setup(void)
{
tabwrite4_tilde_class = class_new(gensym("tabwrite4~"),
(t_newmethod)tabwrite4_tilde_new, 0,
sizeof(t_tabwrite4_tilde), 0, A_DEFSYM, 0);
CLASS_MAINSIGNALIN(tabwrite4_tilde_class, t_tabwrite4_tilde, x_f);
class_addmethod(tabwrite4_tilde_class, (t_method)tabwrite4_tilde_dsp,
gensym("dsp"), 0);
class_addmethod(tabwrite4_tilde_class, (t_method)tabwrite4_tilde_set,
gensym("set"), A_SYMBOL, 0);
class_addmethod(tabwrite4_tilde_class, (t_method)tabwrite4_tilde_stop,
gensym("stop"), 0);
class_addmethod(tabwrite4_tilde_class, (t_method)tabwrite4_tilde_start,
gensym("start"), A_DEFFLOAT, 0);
class_addbang(tabwrite4_tilde_class, tabwrite4_tilde_bang);
}
|
