diff options
author | scuri <scuri> | 2008-10-17 06:10:15 +0000 |
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committer | scuri <scuri> | 2008-10-17 06:10:15 +0000 |
commit | 5a422aba704c375a307a902bafe658342e209906 (patch) | |
tree | 5005011e086bb863d8fb587ad3319bbec59b2447 /src/fftw3/rdft/rdft2-tensor-max-index.c |
First commit - moving from LuaForge to SourceForge
Diffstat (limited to 'src/fftw3/rdft/rdft2-tensor-max-index.c')
-rw-r--r-- | src/fftw3/rdft/rdft2-tensor-max-index.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/fftw3/rdft/rdft2-tensor-max-index.c b/src/fftw3/rdft/rdft2-tensor-max-index.c new file mode 100644 index 0000000..0d29af3 --- /dev/null +++ b/src/fftw3/rdft/rdft2-tensor-max-index.c @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2003 Matteo Frigo + * Copyright (c) 2003 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* $Id: rdft2-tensor-max-index.c,v 1.1 2008/10/17 06:11:29 scuri Exp $ */ + +#include "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; +} |