comparison src/fftw-3.3.3/api/plan-many-dft-c2r.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * Copyright (c) 2003, 2007-11 Matteo Frigo
+ * Copyright (c) 2003, 2007-11 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 "api.h"
+#include "rdft.h"
+
+X(plan) X(plan_many_dft_c2r)(int rank, const int *n,
+			     int howmany,
+			     C *in, const int *inembed,
+			     int istride, int idist,
+			     R *out, const int *onembed,
+			     int ostride, int odist, unsigned flags)
+{
+     R *ri, *ii;
+     int *nfi, *nfo;
+     int inplace;
+     X(plan) p;
+
+     if (!X(many_kosherp)(rank, n, howmany)) return 0;
+
+     EXTRACT_REIM(FFT_SIGN, in, &ri, &ii);
+     inplace = out == ri;
+
+     if (!inplace)
+	  flags |= FFTW_DESTROY_INPUT;
+     p = X(mkapiplan)(
+	  0, flags,
+	  X(mkproblem_rdft2_d_3pointers)(
+	       X(mktensor_rowmajor)(
+		    rank, n, 
+		    X(rdft2_pad)(rank, n, inembed, inplace, 1, &nfi),
+		    X(rdft2_pad)(rank, n, onembed, inplace, 0, &nfo),
+		    2 * istride, ostride),
+	       X(mktensor_1d)(howmany, 2 * idist, odist),
+	       TAINT_UNALIGNED(out, flags),
+	       TAINT_UNALIGNED(ri, flags), TAINT_UNALIGNED(ii, flags),
+	       HC2R));
+
+     X(ifree0)(nfi);
+     X(ifree0)(nfo);
+     return p;
+}