|
Chris@42
|
1 /*
|
|
Chris@42
|
2 * Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
Chris@42
|
3 * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
Chris@42
|
4 *
|
|
Chris@42
|
5 * This program is free software; you can redistribute it and/or modify
|
|
Chris@42
|
6 * it under the terms of the GNU General Public License as published by
|
|
Chris@42
|
7 * the Free Software Foundation; either version 2 of the License, or
|
|
Chris@42
|
8 * (at your option) any later version.
|
|
Chris@42
|
9 *
|
|
Chris@42
|
10 * This program is distributed in the hope that it will be useful,
|
|
Chris@42
|
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Chris@42
|
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
Chris@42
|
13 * GNU General Public License for more details.
|
|
Chris@42
|
14 *
|
|
Chris@42
|
15 * You should have received a copy of the GNU General Public License
|
|
Chris@42
|
16 * along with this program; if not, write to the Free Software
|
|
Chris@42
|
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
Chris@42
|
18 *
|
|
Chris@42
|
19 */
|
|
Chris@42
|
20
|
|
Chris@42
|
21
|
|
Chris@42
|
22 #include "rdft.h"
|
|
Chris@42
|
23
|
|
Chris@42
|
24 /* like X(tensor_max_index), but takes into account the special n/2+1
|
|
Chris@42
|
25 final dimension for the complex output/input of an R2HC/HC2R transform. */
|
|
Chris@42
|
26 INT X(rdft2_tensor_max_index)(const tensor *sz, rdft_kind k)
|
|
Chris@42
|
27 {
|
|
Chris@42
|
28 int i;
|
|
Chris@42
|
29 INT n = 0;
|
|
Chris@42
|
30
|
|
Chris@42
|
31 A(FINITE_RNK(sz->rnk));
|
|
Chris@42
|
32 for (i = 0; i + 1 < sz->rnk; ++i) {
|
|
Chris@42
|
33 const iodim *p = sz->dims + i;
|
|
Chris@42
|
34 n += (p->n - 1) * X(imax)(X(iabs)(p->is), X(iabs)(p->os));
|
|
Chris@42
|
35 }
|
|
Chris@42
|
36 if (i < sz->rnk) {
|
|
Chris@42
|
37 const iodim *p = sz->dims + i;
|
|
Chris@42
|
38 INT is, os;
|
|
Chris@42
|
39 X(rdft2_strides)(k, p, &is, &os);
|
|
Chris@42
|
40 n += X(imax)((p->n - 1) * X(iabs)(is), (p->n/2) * X(iabs)(os));
|
|
Chris@42
|
41 }
|
|
Chris@42
|
42 return n;
|
|
Chris@42
|
43 }
|
