view Lib/fftw-3.2.1/rdft/.svn/text-base/rank-geq2-rdft2.c.svn-base @ 1:e86e9c111b29

Updates stuff that potentially fixes the memory leak and also makes it work on Windows and Linux (Need to test). Still have to fix fftw include for linux in Jucer.

/*
 * Copyright (c) 2003, 2007-8 Matteo Frigo
 * Copyright (c) 2003, 2007-8 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
 *
 */


/* plans for RDFT2 of rank >= 2 (multidimensional) */

#include "rdft.h"
#include "dft.h"

typedef struct {
     solver super;
     int spltrnk;
     const int *buddies;
     int nbuddies;
} S;

typedef struct {
     plan_dft super;
     plan *cldr, *cldc;
     const S *solver;
} P;

static void apply_r2hc(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
{
     const P *ego = (const P *) ego_;

     {
	  plan_rdft2 *cldr = (plan_rdft2 *) ego->cldr;
	  cldr->apply((plan *) cldr, r0, r1, cr, ci);
     }
     
     {
	  plan_dft *cldc = (plan_dft *) ego->cldc;
	  cldc->apply((plan *) cldc, cr, ci, cr, ci);
     }
}

static void apply_hc2r(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
{
     const P *ego = (const P *) ego_;

     {
	  plan_dft *cldc = (plan_dft *) ego->cldc;
	  cldc->apply((plan *) cldc, ci, cr, ci, cr);
     }

     {
	  plan_rdft2 *cldr = (plan_rdft2 *) ego->cldr;
	  cldr->apply((plan *) cldr, r0, r1, cr, ci);
     }
     
}

static void awake(plan *ego_, enum wakefulness wakefulness)
{
     P *ego = (P *) ego_;
     X(plan_awake)(ego->cldr, wakefulness);
     X(plan_awake)(ego->cldc, wakefulness);
}

static void destroy(plan *ego_)
{
     P *ego = (P *) ego_;
     X(plan_destroy_internal)(ego->cldr);
     X(plan_destroy_internal)(ego->cldc);
}

static void print(const plan *ego_, printer *p)
{
     const P *ego = (const P *) ego_;
     const S *s = ego->solver;
     p->print(p, "(rdft2-rank>=2/%d%(%p%)%(%p%))", 
	      s->spltrnk, ego->cldr, ego->cldc);
}
 
static int picksplit(const S *ego, const tensor *sz, int *rp)
{
     A(sz->rnk > 1); /* cannot split rnk <= 1 */
     if (!X(pickdim)(ego->spltrnk, ego->buddies, ego->nbuddies, sz, 1, rp))
          return 0;
     *rp += 1; /* convert from dim. index to rank */
     if (*rp >= sz->rnk) /* split must reduce rank */
          return 0;
     return 1;
}

static int applicable0(const solver *ego_, const problem *p_, int *rp,
		       const planner *plnr)
{
     const problem_rdft2 *p = (const problem_rdft2 *) p_;
     const S *ego = (const S *)ego_;
     return (1
	     && FINITE_RNK(p->sz->rnk) && FINITE_RNK(p->vecsz->rnk)

	     /* FIXME: multidimensional R2HCII ? */
	     && (p->kind == R2HC || p->kind == HC2R)

	     && p->sz->rnk >= 2
	     && picksplit(ego, p->sz, rp)
	     && (0

		 /* can work out-of-place, but HC2R destroys input */
		 || (p->r0 != p->cr && 
		     (p->kind == R2HC || !NO_DESTROY_INPUTP(plnr)))

		 /* FIXME: what are sufficient conditions for inplace? */
		 || (p->r0 == p->cr))
	  );
}

/* TODO: revise this. */
static int applicable(const solver *ego_, const problem *p_, 
		      const planner *plnr, int *rp)
{
     const S *ego = (const S *)ego_;

     if (!applicable0(ego_, p_, rp, plnr)) return 0;

     if (NO_RANK_SPLITSP(plnr) && (ego->spltrnk != ego->buddies[0]))
          return 0;

     if (NO_UGLYP(plnr)) {
	  const problem_rdft2 *p = (const problem_rdft2 *) p_;

	  /* Heuristic: if the vector stride is greater than the transform
	     size, don't use (prefer to do the vector loop first with a
	     vrank-geq1 plan). */
	  if (p->vecsz->rnk > 0 &&
	      X(tensor_min_stride)(p->vecsz) 
	      > X(rdft2_tensor_max_index)(p->sz, p->kind))
	       return 0;
     }

     return 1;
}

static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
{
     const S *ego = (const S *) ego_;
     const problem_rdft2 *p;
     P *pln;
     plan *cldr = 0, *cldc = 0;
     tensor *sz1, *sz2, *vecszi, *sz2i;
     int spltrnk;
     inplace_kind k;
     problem *cldp;

     static const plan_adt padt = {
	  X(rdft2_solve), awake, print, destroy
     };

     if (!applicable(ego_, p_, plnr, &spltrnk))
          return (plan *) 0;

     p = (const problem_rdft2 *) p_;
     X(tensor_split)(p->sz, &sz1, spltrnk, &sz2);

     k = p->kind == R2HC ? INPLACE_OS : INPLACE_IS;
     vecszi = X(tensor_copy_inplace)(p->vecsz, k);
     sz2i = X(tensor_copy_inplace)(sz2, k);

     /* complex data is ~half of real */
     sz2i->dims[sz2i->rnk - 1].n = sz2i->dims[sz2i->rnk - 1].n/2 + 1;

     cldr = X(mkplan_d)(plnr, 
		       X(mkproblem_rdft2_d)(X(tensor_copy)(sz2),
					    X(tensor_append)(p->vecsz, sz1),
					    p->r0, p->r1,
					    p->cr, p->ci, p->kind));
     if (!cldr) goto nada;

     if (p->kind == R2HC)
	  cldp = X(mkproblem_dft_d)(X(tensor_copy_inplace)(sz1, k),
				    X(tensor_append)(vecszi, sz2i),
				    p->cr, p->ci, p->cr, p->ci);
     else /* HC2R must swap re/im parts to get IDFT */
	  cldp = X(mkproblem_dft_d)(X(tensor_copy_inplace)(sz1, k),
				    X(tensor_append)(vecszi, sz2i),
				    p->ci, p->cr, p->ci, p->cr);
     cldc = X(mkplan_d)(plnr, cldp);
     if (!cldc) goto nada;

     pln = MKPLAN_RDFT2(P, &padt, p->kind == R2HC ? apply_r2hc : apply_hc2r);

     pln->cldr = cldr;
     pln->cldc = cldc;

     pln->solver = ego;
     X(ops_add)(&cldr->ops, &cldc->ops, &pln->super.super.ops);

     X(tensor_destroy4)(sz2i, vecszi, sz2, sz1);

     return &(pln->super.super);

 nada:
     X(plan_destroy_internal)(cldr);
     X(plan_destroy_internal)(cldc);
     X(tensor_destroy4)(sz2i, vecszi, sz2, sz1);
     return (plan *) 0;
}

static solver *mksolver(int spltrnk, const int *buddies, int nbuddies)
{
     static const solver_adt sadt = { PROBLEM_RDFT2, mkplan, 0 };
     S *slv = MKSOLVER(S, &sadt);
     slv->spltrnk = spltrnk;
     slv->buddies = buddies;
     slv->nbuddies = nbuddies;
     return &(slv->super);
}

void X(rdft2_rank_geq2_register)(planner *p)
{
     int i;
     static const int buddies[] = { 1, 0, -2 };

     const int nbuddies = (int)(sizeof(buddies) / sizeof(buddies[0]));

     for (i = 0; i < nbuddies; ++i)
          REGISTER_SOLVER(p, mksolver(buddies[i], buddies, nbuddies));

     /* FIXME: Should we try more buddies?  See also dft/rank-geq2. */
}