src/fft4g.h

   1 /* This library is free software; you can redistribute it and/or modify it
   2  * under the terms of the GNU Lesser General Public License as published by
   3  * the Free Software Foundation; either version 2.1 of the License, or (at
   4  * your option) any later version.
   5  *
   6  * This library is distributed in the hope that it will be useful, but
   7  * WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
   9  * General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU Lesser General Public License
  12  * along with this library; if not, write to the Free Software Foundation,
  13  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  14  */
  15
  16 #define FFT4G_MAX_SIZE 262144
  17
  18 void lsx_cdft(int, int, double *, int *, double *);
  19 void lsx_rdft(int, int, double *, int *, double *);
  20 void lsx_ddct(int, int, double *, int *, double *);
  21 void lsx_ddst(int, int, double *, int *, double *);
  22 void lsx_dfct(int, double *, double *, int *, double *);
  23 void lsx_dfst(int, double *, double *, int *, double *);
  24
  25 void lsx_cdft_f(int, int, float *, int *, float *);
  26 void lsx_rdft_f(int, int, float *, int *, float *);
  27 void lsx_ddct_f(int, int, float *, int *, float *);
  28 void lsx_ddst_f(int, int, float *, int *, float *);
  29 void lsx_dfct_f(int, float *, float *, int *, float *);
  30 void lsx_dfst_f(int, float *, float *, int *, float *);
  31
  32 #define dft_br_len(l) (2 + (1 << (int)(log(l / 2 + .5) / log(2.)) / 2))
  33 #define dft_sc_len(l) (l / 2)
  34
  35 /* Over-allocate h by 2 to use these macros */
  36 #define LSX_PACK(h, n)   h[1] = h[n]
  37 #define LSX_UNPACK(h, n) h[n] = h[1], h[n + 1] = h[1] = 0;