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/*
* Copyright (c) 2003, 2006 Matteo Frigo
* Copyright (c) 2003, 2006 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
*
*/
#ifndef __RDFT_H__
#define __RDFT_H__
#include "ifftw.h"
#include "codelet-rdft.h"
/* problem.c: */
typedef struct {
problem super;
tensor *sz, *vecsz;
R *I, *O;
#if defined(STRUCT_HACK_KR)
rdft_kind kind[1];
#elif defined(STRUCT_HACK_C99)
rdft_kind kind[];
#else
rdft_kind *kind;
#endif
} problem_rdft;
void X(rdft_zerotens)(tensor *sz, R *I);
problem *X(mkproblem_rdft)(const tensor *sz, const tensor *vecsz,
R *I, R *O, const rdft_kind *kind);
problem *X(mkproblem_rdft_d)(tensor *sz, tensor *vecsz,
R *I, R *O, const rdft_kind *kind);
problem *X(mkproblem_rdft_0_d)(tensor *vecsz, R *I, R *O);
problem *X(mkproblem_rdft_1)(const tensor *sz, const tensor *vecsz,
R *I, R *O, rdft_kind kind);
problem *X(mkproblem_rdft_1_d)(tensor *sz, tensor *vecsz,
R *I, R *O, rdft_kind kind);
const char *X(rdft_kind_str)(rdft_kind kind);
/* solve.c: */
void X(rdft_solve)(const plan *ego_, const problem *p_);
/* plan.c: */
typedef void (*rdftapply) (const plan *ego, R *I, R *O);
typedef struct {
plan super;
rdftapply apply;
} plan_rdft;
plan *X(mkplan_rdft)(size_t size, const plan_adt *adt, rdftapply apply);
#define MKPLAN_RDFT(type, adt, apply) \
(type *)X(mkplan_rdft)(sizeof(type), adt, apply)
/* various solvers */
solver *X(mksolver_rdft_r2hc_direct)(kr2hc k, const kr2hc_desc *desc);
solver *X(mksolver_rdft_hc2r_direct)(khc2r k, const khc2r_desc *desc);
solver *X(mksolver_rdft_r2r_direct)(kr2r k, const kr2r_desc *desc);
void X(rdft_rank0_register)(planner *p);
void X(rdft_vrank3_transpose_register)(planner *p);
void X(rdft_rank_geq2_register)(planner *p);
void X(rdft_indirect_register)(planner *p);
void X(rdft_vrank_geq1_register)(planner *p);
void X(rdft_buffered_register)(planner *p);
void X(rdft_generic_register)(planner *p);
void X(rdft_rader_hc2hc_register)(planner *p);
void X(rdft_dht_register)(planner *p);
void X(dht_r2hc_register)(planner *p);
void X(dht_rader_register)(planner *p);
void X(dft_r2hc_register)(planner *p);
void X(rdft_nop_register)(planner *p);
void X(hc2hc_generic_register)(planner *p);
/****************************************************************************/
/* problem2.c: */
/* an RDFT2 problem transforms a 1d real array r[n] with stride is/os
to/from an "unpacked" complex array {rio,iio}[n/2 + 1] with stride
os/is. Multidimensional transforms use complex DFTs for the
noncontiguous dimensions. vecsz has the usual interpretation. */
typedef struct {
problem super;
tensor *sz;
tensor *vecsz;
R *r, *rio, *iio;
rdft_kind kind; /* R2HC or HC2R */
} problem_rdft2;
problem *X(mkproblem_rdft2)(const tensor *sz, const tensor *vecsz,
R *r, R *rio, R *iio, rdft_kind kind);
problem *X(mkproblem_rdft2_d)(tensor *sz, tensor *vecsz,
R *r, R *rio, R *iio, rdft_kind kind);
int X(rdft2_inplace_strides)(const problem_rdft2 *p, int vdim);
INT X(rdft2_tensor_max_index)(const tensor *sz, rdft_kind k);
void X(rdft2_strides)(rdft_kind kind, const iodim *d, INT *is, INT *os);
/* verify.c: */
void X(rdft2_verify)(plan *pln, const problem_rdft2 *p, int rounds);
/* solve.c: */
void X(rdft2_solve)(const plan *ego_, const problem *p_);
/* plan.c: */
typedef void (*rdft2apply) (const plan *ego, R *r, R *rio, R *iio);
typedef struct {
plan super;
rdft2apply apply;
} plan_rdft2;
plan *X(mkplan_rdft2)(size_t size, const plan_adt *adt, rdft2apply apply);
#define MKPLAN_RDFT2(type, adt, apply) \
(type *)X(mkplan_rdft2)(sizeof(type), adt, apply)
/* various solvers */
solver *X(mksolver_rdft2_r2hc_direct)(kr2hc k, const kr2hc_desc *desc);
solver *X(mksolver_rdft2_hc2r_direct)(khc2r k, const khc2r_desc *desc);
void X(rdft2_vrank_geq1_register)(planner *p);
void X(rdft2_buffered_register)(planner *p);
void X(rdft2_nop_register)(planner *p);
void X(rdft2_rank0_register)(planner *p);
void X(rdft2_rank_geq2_register)(planner *p);
void X(rdft2_radix2_register)(planner *p);
/****************************************************************************/
/* configurations */
void X(rdft_conf_standard)(planner *p);
#endif /* __RDFT_H__ */
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