mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-06 12:55:05 +00:00
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/*
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
|
|
#include "rdft/rdft.h"
|
|
|
|
/* like X(tensor_max_index), but takes into account the special n/2+1
|
|
final dimension for the complex output/input of an R2HC/HC2R transform. */
|
|
INT X(rdft2_tensor_max_index)(const tensor *sz, rdft_kind k)
|
|
{
|
|
int i;
|
|
INT n = 0;
|
|
|
|
A(FINITE_RNK(sz->rnk));
|
|
for (i = 0; i + 1 < sz->rnk; ++i) {
|
|
const iodim *p = sz->dims + i;
|
|
n += (p->n - 1) * X(imax)(X(iabs)(p->is), X(iabs)(p->os));
|
|
}
|
|
if (i < sz->rnk) {
|
|
const iodim *p = sz->dims + i;
|
|
INT is, os;
|
|
X(rdft2_strides)(k, p, &is, &os);
|
|
n += X(imax)((p->n - 1) * X(iabs)(is), (p->n/2) * X(iabs)(os));
|
|
}
|
|
return n;
|
|
}
|