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
|
#include "ltfat.h"
#include "ltfat_types.h"
LTFAT_EXTERN LTFAT_NAME(dgt_long_plan)
LTFAT_NAME(dgt_long_init)(const LTFAT_COMPLEX *f, const LTFAT_COMPLEX *g,
const ltfatInt L, const ltfatInt W,
const ltfatInt a, const ltfatInt M, LTFAT_COMPLEX *cout,
const dgt_phasetype ptype, unsigned flags)
{
LTFAT_NAME(dgt_long_plan) plan;
ltfatInt h_m;
plan.a = a;
plan.M = M;
plan.L = L;
plan.W = W;
plan.ptype = ptype;
const ltfatInt N = L / a;
const ltfatInt b = L / M;
plan.c = gcd(a, M, &plan.h_a, &h_m);
const ltfatInt p = a / plan.c;
const ltfatInt q = M / plan.c;
const ltfatInt d = b / p;
plan.h_a = -plan.h_a;
plan.sbuf = ltfat_malloc(2 * d * sizeof(LTFAT_REAL));
plan.cout = cout;
plan.f = f;
plan.gf = ltfat_malloc(L * sizeof(LTFAT_COMPLEX));
plan.ff = ltfat_malloc(2 * d * p * q * W * sizeof(LTFAT_REAL));
plan.cf = ltfat_malloc(2 * d * q * q * W * sizeof(LTFAT_REAL));
/* Get factorization of window */
LTFAT_NAME_COMPLEX(wfac)(g, L, 1, a, M, plan.gf);
// Downcasting to ints
int Mint = (int) M;
/* Create plans. In-place. */
plan.p_veryend =
LTFAT_FFTW(plan_many_dft)(1, &Mint, N * W,
plan.cout, NULL,
1, Mint,
plan.cout, NULL,
1, Mint,
FFTW_FORWARD, flags);
plan.p_before =
LTFAT_FFTW(plan_dft_1d)(d, (LTFAT_COMPLEX*)plan.sbuf,
(LTFAT_COMPLEX*)plan.sbuf,
FFTW_FORWARD, flags);
plan.p_after =
LTFAT_FFTW(plan_dft_1d)(d, (LTFAT_COMPLEX*)plan.sbuf,
(LTFAT_COMPLEX*)plan.sbuf,
FFTW_BACKWARD, flags);
return plan;
}
LTFAT_EXTERN void
LTFAT_NAME(dgt_long_execute)(const LTFAT_NAME(dgt_long_plan) plan)
{
LTFAT_NAME(dgt_walnut_plan)(plan);
if (plan.ptype)
{
LTFAT_NAME_COMPLEX(dgtphaselockhelper)(plan.cout, plan.L, plan.W, plan.a,
plan.M, plan.cout);
/*ltfatInt N = plan.L / plan.a;
ltfatInt W = plan.W;
for (ltfatInt w = 0; w < W; w++)
{
for (ltfatInt n = 0; n < N; n++)
{
LTFAT_COMPLEX* couttmp = plan.cout + w * N * plan.M + n * plan.M;
LTFAT_NAME_COMPLEX(circshift)(couttmp, couttmp, plan.M, -plan.a * n);
}
}
*/
}
/* FFT to modulate the coefficients. */
LTFAT_FFTW(execute)(plan.p_veryend);
}
LTFAT_EXTERN void
LTFAT_NAME(dgt_long_done)(LTFAT_NAME(dgt_long_plan) plan)
{
LTFAT_FFTW(destroy_plan)(plan.p_veryend);
LTFAT_FFTW(destroy_plan)(plan.p_before);
LTFAT_FFTW(destroy_plan)(plan.p_after);
LTFAT_SAFEFREEALL(plan.sbuf, plan.gf, plan.ff, plan.cf);
}
/* -------------- Real valued signal ------------------------ */
LTFAT_EXTERN
void LTFAT_NAME(dgt_fac_r)(const LTFAT_REAL *f, const LTFAT_COMPLEX *gf,
const ltfatInt L, const ltfatInt W,
const ltfatInt a, const ltfatInt M,
const dgt_phasetype ptype, LTFAT_COMPLEX *cout)
{
const ltfatInt N = L / a;
// Downcasting to int
int Mint = (int) M;
/* Create plan. In-place. */
LTFAT_FFTW(plan) p_veryend =
LTFAT_FFTW(plan_many_dft)(1, &Mint, N * W,
cout, NULL,
1, Mint,
cout, NULL,
1, Mint,
FFTW_FORWARD, FFTW_ESTIMATE);
LTFAT_NAME(dgt_walnut_r)(f, gf, L, W, a, M, cout);
if (ptype)
{
LTFAT_NAME_COMPLEX(dgtphaselockhelper)(cout, L, W, a, M, cout);
}
/* FFT to modulate the coefficients. */
LTFAT_FFTW(execute)(p_veryend);
LTFAT_FFTW(destroy_plan)(p_veryend);
}
|
