1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/mm/mmplugins/lib3gp/impl/src/endian.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,159 @@
     1.4 +// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#include <3gplibrary/mp4config.h>
    1.20 +
    1.21 +/*
    1.22 + * Function:
    1.23 + *
    1.24 + *   mp4_u16 u16endian(mp4_u16 u)
    1.25 + *
    1.26 + * Description:
    1.27 + *
    1.28 + *   This function converts the input parameter u between network byte
    1.29 + *   order (big endian) and current computer byte order.
    1.30 + *
    1.31 + *   Note: Intel based Windows system is little endian.
    1.32 + *         ARM based Symbian OS is little endian.
    1.33 + *
    1.34 + * Parameters:
    1.35 + *
    1.36 + *   u     Input value
    1.37 + *
    1.38 + * Return value:
    1.39 + *
    1.40 + *   Converted value
    1.41 + *
    1.42 + */
    1.43 +mp4_u16 u16endian(mp4_u16 u)
    1.44 +{
    1.45 +  mp4_u16 result;
    1.46 +
    1.47 +  ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&u)[1];
    1.48 +  ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&u)[0];
    1.49 +
    1.50 +  return result;
    1.51 +}
    1.52 +
    1.53 +
    1.54 +/*
    1.55 + * Function:
    1.56 + *
    1.57 + *   mp4_u32 u32endian(mp4_u32 u)
    1.58 + *
    1.59 + * Description:
    1.60 + *
    1.61 + *   This function converts the input parameter u between network byte
    1.62 + *   order (big endian) and current computer byte order.
    1.63 + *
    1.64 + *   Note: Intel based Windows system is little endian.
    1.65 + *         ARM based Symbian OS is little endian.
    1.66 + *
    1.67 + * Parameters:
    1.68 + *
    1.69 + *   u     Input value
    1.70 + *
    1.71 + * Return value:
    1.72 + *
    1.73 + *   Converted value
    1.74 + *
    1.75 + */
    1.76 +mp4_u32 u32endian(mp4_u32 u)
    1.77 +{
    1.78 +  mp4_u32 result;
    1.79 +
    1.80 +  ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&u)[3];
    1.81 +  ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&u)[2];
    1.82 +  ((mp4_u8 *)&result)[2] = ((mp4_u8 *)&u)[1];
    1.83 +  ((mp4_u8 *)&result)[3] = ((mp4_u8 *)&u)[0];
    1.84 +
    1.85 +  return result;
    1.86 +}
    1.87 +
    1.88 +
    1.89 +/*
    1.90 + * Function:
    1.91 + *
    1.92 + *   mp4_i32 i32endian(mp4_i32 i)
    1.93 + *
    1.94 + * Description:
    1.95 + *
    1.96 + *   This function converts the input parameter i between network byte
    1.97 + *   order (big endian) and current computer byte order.
    1.98 + *
    1.99 + *   Note: Intel based Windows system is little endian.
   1.100 + *         ARM based Symbian OS is little endian.
   1.101 + *
   1.102 + * Parameters:
   1.103 + *
   1.104 + *   i     Input value
   1.105 + *
   1.106 + * Return value:
   1.107 + *
   1.108 + *   Converted value
   1.109 + *
   1.110 + */
   1.111 +mp4_i32 i32endian(mp4_i32 i)
   1.112 +{
   1.113 +  mp4_i32 result;
   1.114 +
   1.115 +  ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&i)[3];
   1.116 +  ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&i)[2];
   1.117 +  ((mp4_u8 *)&result)[2] = ((mp4_u8 *)&i)[1];
   1.118 +  ((mp4_u8 *)&result)[3] = ((mp4_u8 *)&i)[0];
   1.119 +
   1.120 +  return result;
   1.121 +}
   1.122 +
   1.123 +
   1.124 +/*
   1.125 + * Function:
   1.126 + *
   1.127 + *   mp4_u64 u64endian(mp4_u64 u)
   1.128 + *
   1.129 + * Description:
   1.130 + *
   1.131 + *   This function converts the input parameter u between network byte
   1.132 + *   order (big endian) and current computer byte order.
   1.133 + *
   1.134 + *   Note: Intel based Windows system is little endian.
   1.135 + *         ARM based Symbian OS is little endian.
   1.136 + *
   1.137 + * Parameters:
   1.138 + *
   1.139 + *   u     Input value
   1.140 + *
   1.141 + * Return value:
   1.142 + *
   1.143 + *   Converted value
   1.144 + *
   1.145 + */
   1.146 +mp4_u64 u64endian(mp4_u64 u)
   1.147 +{
   1.148 +  mp4_u64 result;
   1.149 +
   1.150 +  ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&u)[7];
   1.151 +  ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&u)[6];
   1.152 +  ((mp4_u8 *)&result)[2] = ((mp4_u8 *)&u)[5];
   1.153 +  ((mp4_u8 *)&result)[3] = ((mp4_u8 *)&u)[4];
   1.154 +  ((mp4_u8 *)&result)[4] = ((mp4_u8 *)&u)[3];
   1.155 +  ((mp4_u8 *)&result)[5] = ((mp4_u8 *)&u)[2];
   1.156 +  ((mp4_u8 *)&result)[6] = ((mp4_u8 *)&u)[1];
   1.157 +  ((mp4_u8 *)&result)[7] = ((mp4_u8 *)&u)[0];
   1.158 +
   1.159 +  return result;
   1.160 +}
   1.161 +
   1.162 +// End of File