vp8/common/bigend.h

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 #ifndef _bigend_h
  13 #define _bigend_h
  14
  15 #if defined(__cplusplus)
  16 extern "C" {
  17 #endif
  18
  19 #define invert2(x) ( (((x)>>8)&0x00ff) | (((x)<<8)&0xff00) )
  20 #define invert4(x) ( ((invert2(x)&0x0000ffff)<<16) | (invert2((x>>16))&0x0000ffff) )
  21
  22 #define high_byte(x) (unsigned char)x
  23 #define mid2Byte(x) (unsigned char)(x >> 8)
  24 #define mid1Byte(x) (unsigned char)(x >> 16)
  25 #define low_byte(x) (unsigned char)(x >> 24)
  26
  27 #define SWAPENDS 1
  28
  29 #if defined(__cplusplus)
  30 }
  31 #endif
  32 #endif