view Lib/fftw-3.2.1/rdft/direct2.c @ 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
 *
 */


/* direct RDFT2 R2HC/HC2R solver, if we have a codelet */

#include "rdft.h"

typedef struct {
     solver super;
     const kr2c_desc *desc;
     kr2c k;
} S;

typedef struct {
     plan_rdft2 super;

     stride rs, cs;
     INT vl;
     INT ivs, ovs;
     kr2c k;
     const S *slv;
     INT ilast;
} P;

static void apply(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
{
     const P *ego = (const P *) ego_;
     ASSERT_ALIGNED_DOUBLE;
     ego->k(r0, r1, cr, ci,
	    ego->rs, ego->cs, ego->cs,
	    ego->vl, ego->ivs, ego->ovs);
}

static void apply_r2hc(const plan *ego_, R *r0, R *r1, R *cr, R *ci)
{
     const P *ego = (const P *) ego_;
     INT i, vl = ego->vl, ovs = ego->ovs;
     ASSERT_ALIGNED_DOUBLE;
     ego->k(r0, r1, cr, ci,
	    ego->rs, ego->cs, ego->cs,
	    vl, ego->ivs, ovs);
     for (i = 0; i < vl; ++i, ci += ovs)
	  ci[0] = ci[ego->ilast] = 0;
}

static void destroy(plan *ego_)
{
     P *ego = (P *) ego_;
     X(stride_destroy)(ego->rs);
     X(stride_destroy)(ego->cs);
}

static void print(const plan *ego_, printer *p)
{
     const P *ego = (const P *) ego_;
     const S *s = ego->slv;

     p->print(p, "(rdft2-%s-direct-%D%v \"%s\")", 
	      X(rdft_kind_str)(s->desc->genus->kind), s->desc->n, 
	      ego->vl, s->desc->nam);
}

static int applicable(const solver *ego_, const problem *p_)
{
     const S *ego = (const S *) ego_;
     const kr2c_desc *desc = ego->desc;
     const problem_rdft2 *p = (const problem_rdft2 *) p_;
     INT vl;
     INT ivs, ovs;

     return (
	  1
	  && p->sz->rnk == 1
	  && p->vecsz->rnk <= 1
	  && p->sz->dims[0].n == desc->n
	  && p->kind == desc->genus->kind

	  /* check strides etc */
	  && X(tensor_tornk1)(p->vecsz, &vl, &ivs, &ovs)

	  && (0
	      /* can operate out-of-place */
	      || p->r0 != p->cr

	      /*
	       * can compute one transform in-place, no matter
	       * what the strides are.
	       */
	      || p->vecsz->rnk == 0

	      /* can operate in-place as long as strides are the same */
	      || X(rdft2_inplace_strides)(p, RNK_MINFTY)
	       )
	  );
}

static plan *mkplan(const solver *ego_, const problem *p_, planner *plnr)
{
     const S *ego = (const S *) ego_;
     P *pln;
     const problem_rdft2 *p;
     iodim *d;
     int r2hc_kindp;

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

     UNUSED(plnr);

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

     p = (const problem_rdft2 *) p_;

     r2hc_kindp = R2HC_KINDP(p->kind);
     A(r2hc_kindp || HC2R_KINDP(p->kind));

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

     d = p->sz->dims;

     pln->k = ego->k;

     pln->rs = X(mkstride)(d->n, r2hc_kindp ? d->is : d->os);
     pln->cs = X(mkstride)(d->n, r2hc_kindp ? d->os : d->is);

     X(tensor_tornk1)(p->vecsz, &pln->vl, &pln->ivs, &pln->ovs);

     /* Nyquist freq., if any */
     pln->ilast = (d->n % 2) ? 0 : (d->n/2) * d->os;

     pln->slv = ego;
     X(ops_zero)(&pln->super.super.ops);
     X(ops_madd2)(pln->vl / ego->desc->genus->vl,
		  &ego->desc->ops,
		  &pln->super.super.ops);
     if (p->kind == R2HC)
	  pln->super.super.ops.other += 2 * pln->vl; /* + 2 stores */

     pln->super.super.could_prune_now_p = 1;
     return &(pln->super.super);
}

/* constructor */
solver *X(mksolver_rdft2_direct)(kr2c k, const kr2c_desc *desc)
{
     static const solver_adt sadt = { PROBLEM_RDFT2, mkplan, 0 };
     S *slv = MKSOLVER(S, &sadt);
     slv->k = k;
     slv->desc = desc;
     return &(slv->super);
}