cannam@167: /*
cannam@167:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@167:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@167:  *
cannam@167:  * This program is free software; you can redistribute it and/or modify
cannam@167:  * it under the terms of the GNU General Public License as published by
cannam@167:  * the Free Software Foundation; either version 2 of the License, or
cannam@167:  * (at your option) any later version.
cannam@167:  *
cannam@167:  * This program is distributed in the hope that it will be useful,
cannam@167:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@167:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@167:  * GNU General Public License for more details.
cannam@167:  *
cannam@167:  * You should have received a copy of the GNU General Public License
cannam@167:  * along with this program; if not, write to the Free Software
cannam@167:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@167:  *
cannam@167:  */
cannam@167: 
cannam@167: 
cannam@167: #include "rdft/rdft.h"
cannam@167: 
cannam@167: /* like X(tensor_max_index), but takes into account the special n/2+1
cannam@167:    final dimension for the complex output/input of an R2HC/HC2R transform. */
cannam@167: INT X(rdft2_tensor_max_index)(const tensor *sz, rdft_kind k)
cannam@167: {
cannam@167:      int i;
cannam@167:      INT n = 0;
cannam@167: 
cannam@167:      A(FINITE_RNK(sz->rnk));
cannam@167:      for (i = 0; i + 1 < sz->rnk; ++i) {
cannam@167:           const iodim *p = sz->dims + i;
cannam@167:           n += (p->n - 1) * X(imax)(X(iabs)(p->is), X(iabs)(p->os));
cannam@167:      }
cannam@167:      if (i < sz->rnk) {
cannam@167: 	  const iodim *p = sz->dims + i;
cannam@167: 	  INT is, os;
cannam@167: 	  X(rdft2_strides)(k, p, &is, &os);
cannam@167: 	  n += X(imax)((p->n - 1) * X(iabs)(is), (p->n/2) * X(iabs)(os));
cannam@167:      }
cannam@167:      return n;
cannam@167: }