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https://github.com/tildearrow/furnace.git
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60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
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/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "api/api.h"
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#include "rdft/rdft.h"
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X(plan) X(plan_many_dft_c2r)(int rank, const int *n,
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int howmany,
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C *in, const int *inembed,
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int istride, int idist,
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R *out, const int *onembed,
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int ostride, int odist, unsigned flags)
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{
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R *ri, *ii;
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int *nfi, *nfo;
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int inplace;
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X(plan) p;
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if (!X(many_kosherp)(rank, n, howmany)) return 0;
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EXTRACT_REIM(FFT_SIGN, in, &ri, &ii);
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inplace = out == ri;
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if (!inplace)
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flags |= FFTW_DESTROY_INPUT;
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p = X(mkapiplan)(
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0, flags,
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X(mkproblem_rdft2_d_3pointers)(
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X(mktensor_rowmajor)(
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rank, n,
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X(rdft2_pad)(rank, n, inembed, inplace, 1, &nfi),
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X(rdft2_pad)(rank, n, onembed, inplace, 0, &nfo),
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2 * istride, ostride),
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X(mktensor_1d)(howmany, 2 * idist, odist),
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TAINT_UNALIGNED(out, flags),
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TAINT_UNALIGNED(ri, flags), TAINT_UNALIGNED(ii, flags),
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HC2R));
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X(ifree0)(nfi);
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X(ifree0)(nfo);
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return p;
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}
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