apps/codecs/lib/mdct2.h

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
   4  *                                                                  *
   5  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   6  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   7  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   8  *                                                                  *
   9  * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2002    *
  10  * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
  11  *                                                                  *
  12  ********************************************************************
  13
  14  function: modified discrete cosine transform prototypes
  15
  16  ********************************************************************/
  17
  18 #ifndef _OGG_mdct_H_
  19 #define _OGG_mdct_H_
  20
  21
  22
  23 #ifdef _LOW_ACCURACY_
  24 #  define X(n) (((((n)>>22)+1)>>1) - ((((n)>>22)+1)>>9))
  25 #  //define LOOKUP_T const unsigned char
  26 #else
  27 #  define X(n) (n)
  28 #  //define LOOKUP_T const ogg_int32_t
  29 #endif
  30
  31 #ifdef ROCKBOX
  32 #include <codecs.h>
  33 #endif /* ROCKBOX */
  34
  35 #include "asm_arm.h"
  36 #include "asm_mcf5249.h"
  37 #include "codeclib_misc.h"
  38
  39 #ifndef ICONST_ATTR_TREMOR_WINDOW
  40 #define ICONST_ATTR_TREMOR_WINDOW ICONST_ATTR
  41 #endif
  42
  43 #ifndef ICODE_ATTR_TREMOR_MDCT
  44 #define ICODE_ATTR_TREMOR_MDCT ICODE_ATTR
  45 #endif
  46
  47 #ifndef ICODE_ATTR_TREMOR_NOT_MDCT
  48 #define ICODE_ATTR_TREMOR_NOT_MDCT ICODE_ATTR
  49 #endif
  50
  51
  52
  53 #ifdef _LOW_ACCURACY_
  54 #define cPI3_8 (0x0062)
  55 #define cPI2_8 (0x00b5)
  56 #define cPI1_8 (0x00ed)
  57 #else
  58 #define cPI3_8 (0x30fbc54d)
  59 #define cPI2_8 (0x5a82799a)
  60 #define cPI1_8 (0x7641af3d)
  61 #endif
  62
  63
  64 extern void mdct_backward(int n, int32_t *in, int32_t *out);
  65
  66 #endif
  67
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