sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include <3gplibrary/mp4config.h>
sl@0: 
sl@0: /*
sl@0:  * Function:
sl@0:  *
sl@0:  *   mp4_u16 u16endian(mp4_u16 u)
sl@0:  *
sl@0:  * Description:
sl@0:  *
sl@0:  *   This function converts the input parameter u between network byte
sl@0:  *   order (big endian) and current computer byte order.
sl@0:  *
sl@0:  *   Note: Intel based Windows system is little endian.
sl@0:  *         ARM based Symbian OS is little endian.
sl@0:  *
sl@0:  * Parameters:
sl@0:  *
sl@0:  *   u     Input value
sl@0:  *
sl@0:  * Return value:
sl@0:  *
sl@0:  *   Converted value
sl@0:  *
sl@0:  */
sl@0: mp4_u16 u16endian(mp4_u16 u)
sl@0: {
sl@0:   mp4_u16 result;
sl@0: 
sl@0:   ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&u)[1];
sl@0:   ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&u)[0];
sl@0: 
sl@0:   return result;
sl@0: }
sl@0: 
sl@0: 
sl@0: /*
sl@0:  * Function:
sl@0:  *
sl@0:  *   mp4_u32 u32endian(mp4_u32 u)
sl@0:  *
sl@0:  * Description:
sl@0:  *
sl@0:  *   This function converts the input parameter u between network byte
sl@0:  *   order (big endian) and current computer byte order.
sl@0:  *
sl@0:  *   Note: Intel based Windows system is little endian.
sl@0:  *         ARM based Symbian OS is little endian.
sl@0:  *
sl@0:  * Parameters:
sl@0:  *
sl@0:  *   u     Input value
sl@0:  *
sl@0:  * Return value:
sl@0:  *
sl@0:  *   Converted value
sl@0:  *
sl@0:  */
sl@0: mp4_u32 u32endian(mp4_u32 u)
sl@0: {
sl@0:   mp4_u32 result;
sl@0: 
sl@0:   ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&u)[3];
sl@0:   ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&u)[2];
sl@0:   ((mp4_u8 *)&result)[2] = ((mp4_u8 *)&u)[1];
sl@0:   ((mp4_u8 *)&result)[3] = ((mp4_u8 *)&u)[0];
sl@0: 
sl@0:   return result;
sl@0: }
sl@0: 
sl@0: 
sl@0: /*
sl@0:  * Function:
sl@0:  *
sl@0:  *   mp4_i32 i32endian(mp4_i32 i)
sl@0:  *
sl@0:  * Description:
sl@0:  *
sl@0:  *   This function converts the input parameter i between network byte
sl@0:  *   order (big endian) and current computer byte order.
sl@0:  *
sl@0:  *   Note: Intel based Windows system is little endian.
sl@0:  *         ARM based Symbian OS is little endian.
sl@0:  *
sl@0:  * Parameters:
sl@0:  *
sl@0:  *   i     Input value
sl@0:  *
sl@0:  * Return value:
sl@0:  *
sl@0:  *   Converted value
sl@0:  *
sl@0:  */
sl@0: mp4_i32 i32endian(mp4_i32 i)
sl@0: {
sl@0:   mp4_i32 result;
sl@0: 
sl@0:   ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&i)[3];
sl@0:   ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&i)[2];
sl@0:   ((mp4_u8 *)&result)[2] = ((mp4_u8 *)&i)[1];
sl@0:   ((mp4_u8 *)&result)[3] = ((mp4_u8 *)&i)[0];
sl@0: 
sl@0:   return result;
sl@0: }
sl@0: 
sl@0: 
sl@0: /*
sl@0:  * Function:
sl@0:  *
sl@0:  *   mp4_u64 u64endian(mp4_u64 u)
sl@0:  *
sl@0:  * Description:
sl@0:  *
sl@0:  *   This function converts the input parameter u between network byte
sl@0:  *   order (big endian) and current computer byte order.
sl@0:  *
sl@0:  *   Note: Intel based Windows system is little endian.
sl@0:  *         ARM based Symbian OS is little endian.
sl@0:  *
sl@0:  * Parameters:
sl@0:  *
sl@0:  *   u     Input value
sl@0:  *
sl@0:  * Return value:
sl@0:  *
sl@0:  *   Converted value
sl@0:  *
sl@0:  */
sl@0: mp4_u64 u64endian(mp4_u64 u)
sl@0: {
sl@0:   mp4_u64 result;
sl@0: 
sl@0:   ((mp4_u8 *)&result)[0] = ((mp4_u8 *)&u)[7];
sl@0:   ((mp4_u8 *)&result)[1] = ((mp4_u8 *)&u)[6];
sl@0:   ((mp4_u8 *)&result)[2] = ((mp4_u8 *)&u)[5];
sl@0:   ((mp4_u8 *)&result)[3] = ((mp4_u8 *)&u)[4];
sl@0:   ((mp4_u8 *)&result)[4] = ((mp4_u8 *)&u)[3];
sl@0:   ((mp4_u8 *)&result)[5] = ((mp4_u8 *)&u)[2];
sl@0:   ((mp4_u8 *)&result)[6] = ((mp4_u8 *)&u)[1];
sl@0:   ((mp4_u8 *)&result)[7] = ((mp4_u8 *)&u)[0];
sl@0: 
sl@0:   return result;
sl@0: }
sl@0: 
sl@0: // End of File