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annotate src/fftw-3.3.5/rdft/rdft2-strides.c @ 42:2cd0e3b3e1fd

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Current fftw source
author Chris Cannam
date Tue, 18 Oct 2016 13:40:26 +0100
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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 #include "rdft.h"
Chris@42 22
Chris@42 23 /* Deal with annoyance because the tensor (is,os) applies to
Chris@42 24 (r,rio/iio) for R2HC and vice-versa for HC2R. We originally had
Chris@42 25 (is,os) always apply to (r,rio/iio), but this causes other
Chris@42 26 headaches with the tensor functions. */
Chris@42 27 void X(rdft2_strides)(rdft_kind kind, const iodim *d, INT *rs, INT *cs)
Chris@42 28 {
Chris@42 29 if (kind == R2HC) {
Chris@42 30 *rs = d->is;
Chris@42 31 *cs = d->os;
Chris@42 32 }
Chris@42 33 else {
Chris@42 34 A(kind == HC2R);
Chris@42 35 *rs = d->os;
Chris@42 36 *cs = d->is;
Chris@42 37 }
Chris@42 38 }