modules/codec/wmafixed/fft.h

   1 /*
   2  * WMA compatible decoder
   3  * Copyright (c) 2002 The FFmpeg Project.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #ifndef WMA_FFT_H
  21 #define WMA_FFT_H 1
  22
  23 #include <inttypes.h>
  24
  25 typedef int32_t FFTSample;
  26
  27 typedef struct FFTComplex
  28 {
  29     int32_t re, im;
  30 }
  31 FFTComplex;
  32
  33 typedef struct FFTContext
  34 {
  35     int nbits;
  36     int inverse;
  37     uint16_t *revtab;
  38     FFTComplex *exptab;
  39     FFTComplex *exptab1; /* only used by SSE code */
  40     int (*fft_calc)(struct FFTContext *s, FFTComplex *z);
  41 }
  42 FFTContext;
  43
  44 int fft_calc_unscaled(FFTContext *s, FFTComplex *z);
  45 int fft_init_global(void);
  46
  47 #endif