ref: d85eab9f640c6872faef17cfd2fc74a4d728ad77
dir: /src/fft4g.h/
/* This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 of the License, or (at * your option) any later version. * * This library 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 Lesser * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ void cdft(int, int, double *, int *, double *); void rdft(int, int, double *, int *, double *); void ddct(int, int, double *, int *, double *); void ddst(int, int, double *, int *, double *); void dfct(int, double *, double *, int *, double *); void dfst(int, double *, double *, int *, double *); void cdft_f(int, int, float *, int *, float *); void rdft_f(int, int, float *, int *, float *); void ddct_f(int, int, float *, int *, float *); void ddst_f(int, int, float *, int *, float *); void dfct_f(int, float *, float *, int *, float *); void dfst_f(int, float *, float *, int *, float *); #define dft_br_len(l) (2 + (1 << (int)(log(l / 2 + .5) / log(2.)) / 2)) #define dft_sc_len(l) (l / 2)