media/libtheora/lib/dec/dct.h

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2007                *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13   function:
  14   last mod: $Id: dct.h 13884 2007-09-22 08:38:10Z giles $
  15
  16  ********************************************************************/
  17
  18 /*Definitions shared by the forward and inverse DCT transforms.*/
  19 #if !defined(_dct_H)
  20 # define _dct_H (1)
  21
  22 /*cos(n*pi/16) (resp. sin(m*pi/16)) scaled by 65536.*/
  23 #define OC_C1S7 ((ogg_int32_t)64277)
  24 #define OC_C2S6 ((ogg_int32_t)60547)
  25 #define OC_C3S5 ((ogg_int32_t)54491)
  26 #define OC_C4S4 ((ogg_int32_t)46341)
  27 #define OC_C5S3 ((ogg_int32_t)36410)
  28 #define OC_C6S2 ((ogg_int32_t)25080)
  29 #define OC_C7S1 ((ogg_int32_t)12785)
  30
  31 #endif