blob: 5c845d35a0a3967b22df8e9febc20a394ce0db4a (
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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
// Fractal Chaos Oscillator
//
// fractal_chaos_oscillator
//
// Fractal Chaos Oscillator
//
// Oscillator derived from fractal chaos bands
//
// Inputs: 4
// Outputs: 1
// Constants: 1
#include "ts.h"
typedef struct {
uint_t k;
} ts_fractal_chaos_oscillator_params_t;
ts_parameter_t const ts_fractal_chaos_oscillator_p = { .n_inputs = 4, .n_outputs = 1, .n_constants = 1, .params_size = sizeof(ts_fractal_chaos_oscillator_params_t) };
uint_t ts_fractal_chaos_oscillator_offset( ts_constant_t const *c )
{
( void )c;
return ( c ? ((ts_fractal_chaos_oscillator_params_t *)c)->k / 2 : 0 );
}
int ts_fractal_chaos_oscillator(
fp_t * const *y, uint_t y_n,
fp_t const * const *x, uint_t x_n,
uint_t n, ts_constant_t const *c
)
{
TS_PROLOGUE( ts_fractal_chaos_oscillator_p );
if ( !c ) return -1;
uint_t k = ((ts_fractal_chaos_oscillator_params_t *)c)->k;
if (k == 0 || n < k) return -1;
fp_t alpha = 2.0 / (k + 1.0);
fp_t ema_upper = 0;
fp_t ema_lower = 0;
uint_t half_k = k / 2;
uint_t init = 0;
for (uint_t i = half_k; i < n - half_k; ++i)
{
fp_t fh = x[1][i];
fp_t fl = x[2][i];
for (int_t j = -(int_t)half_k; j <= (int_t)half_k; ++j)
{
uint_t idx = (uint_t)((int_t)i + j);
if (x[1][idx] > fh) fh = x[1][idx];
if (x[2][idx] < fl) fl = x[2][idx];
}
if (!init)
{
ema_upper = fh;
ema_lower = fl;
init = 1;
}
else
{
ema_upper = ema_upper + alpha * (fh - ema_upper);
ema_lower = ema_lower + alpha * (fl - ema_lower);
}
fp_t denom = ema_upper + ema_lower;
y[0][i] = (denom != 0) ? (ema_upper - ema_lower) / denom * 100.0 : 0;
}
return 0;
}
|