/*
  * (I)RDFT transforms
  * Copyright (c) 2009 Alex Converse <alex dot converse at gmail dot com>
  *

  * This file is part of FFmpeg.

  *

  * FFmpeg 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.
  *

  * FFmpeg 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 FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVCODEC_RDFT_H
 #define AVCODEC_RDFT_H
 
 #include "config.h"
 #include "fft.h"
 
 #if CONFIG_HARDCODED_TABLES
 #   define SINTABLE_CONST const
 #else
 #   define SINTABLE_CONST
 #endif
 
 #define SINTABLE(size) \
     SINTABLE_CONST DECLARE_ALIGNED(16, FFTSample, ff_sin_##size)[size/2]
 
 extern SINTABLE(16);
 extern SINTABLE(32);
 extern SINTABLE(64);
 extern SINTABLE(128);
 extern SINTABLE(256);
 extern SINTABLE(512);
 extern SINTABLE(1024);
 extern SINTABLE(2048);
 extern SINTABLE(4096);
 extern SINTABLE(8192);
 extern SINTABLE(16384);
 extern SINTABLE(32768);
 extern SINTABLE(65536);
 
 struct RDFTContext {
     int nbits;
     int inverse;
     int sign_convention;
 
     /* pre/post rotation tables */
     const FFTSample *tcos;
     SINTABLE_CONST FFTSample *tsin;
     FFTContext fft;
     void (*rdft_calc)(struct RDFTContext *s, FFTSample *z);
 };
 
 /**
  * Set up a real FFT.
  * @param nbits           log2 of the length of the input array
  * @param trans           the type of transform
  */
 int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans);
 void ff_rdft_end(RDFTContext *s);
 
 void ff_rdft_init_arm(RDFTContext *s);
 
 

 #endif /* AVCODEC_RDFT_H */