blob: 31602ed8867d5afba0946d962cecfd0e8c040624 (
plain)
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
|
#include <assert.h>
#include "sig.h"
typedef struct ops_expand_ctxt_t {
sig_sig_t *value;
} ops_expand_ctxt_t;
static size_t ops_expand_size(va_list ap)
{
return sizeof(ops_expand_ctxt_t);
}
/* expects a single sig_sig_t: value
* input range is assumed to be 0..1, outputs expanded
* range of -1..+1
*/
static void ops_expand_init(void *context, va_list ap)
{
ops_expand_ctxt_t *ctxt = context;
assert(ctxt);
ctxt->value = va_arg(ap, sig_sig_t *);
}
static void ops_expand_destroy(void *context)
{
ops_expand_ctxt_t *ctxt = context;
assert(ctxt);
sig_free(ctxt->value);
}
static float ops_expand_output(void *context, unsigned ticks_ms)
{
ops_expand_ctxt_t *ctxt = context;
assert(ctxt);
return sig_output(ctxt->value, ticks_ms) * 2.f + 1.f;
}
sig_ops_t sig_ops_expand = {
.size = ops_expand_size,
.init = ops_expand_init,
.destroy = ops_expand_destroy,
.output = ops_expand_output,
};
|
