/*

* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:    

*                Amr audio.

*

*/

// INCLUDE FILES

#include "amrpayloadheaderoa.h"

#include "streamformatter.h"

#include "amrcommonutil.h"

// CONSTANTS

// ============================ MEMBER FUNCTIONS =============================

// ---------------------------------------------------------------------------

// CAmrPayloadHeader::CAmrPayloadHeader

// C++ default constructor can NOT contain any code, that

// might leave.

// ---------------------------------------------------------------------------

//

CAmrPayloadHeaderOA::CAmrPayloadHeaderOA() : CAmrPayloadHeader()

    {

    DP_AMR_ENCODE( "CAmrPayloadHeaderOA::CAmrPayloadHeaderOA" );        

    }

// ---------------------------------------------------------------------------

// CAmrPayloadHeaderOA::NewL

// Two-phased constructor.

// ---------------------------------------------------------------------------

//

CAmrPayloadHeaderOA* CAmrPayloadHeaderOA::NewL()

    {

    DP_AMR_ENCODE( "CAmrPayloadHeaderOA::NewL" );

    CAmrPayloadHeaderOA* self = new( ELeave ) CAmrPayloadHeaderOA( );

    return self;

    }

// Destructor

CAmrPayloadHeaderOA::~CAmrPayloadHeaderOA()

    {

    DP_AMR_ENCODE( "CAmrPayloadHeaderOA::~CAmrPayloadHeaderOA" );

    }

// ---------------------------------------------------------------------------

// CAmrPayloadHeaderOA::Encode

// Encode the payload header fields into a given buffer at the given position.

// ---------------------------------------------------------------------------

//

void CAmrPayloadHeaderOA::Encode( TUint8* aBuffer, 

        TInt& aByteIndex, TInt& aBitIndex )

    {

    DP_AMR_ENCODE( "CAmrPayloadHeaderOA::Encode" );

    //In octet-aligned mode, the payload header consists of a 4 bit CMR, 4

    //reserved bits, and optionally, an 8 bit interleaving header, as shown

    //below:

    //    0                   1

    //    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5

    //   +-+-+-+-+-+-+-+-+- - - - - - - -

    //   |  CMR  |R|R|R|R|  ILL  |  ILP  |

    //   +-+-+-+-+-+-+-+-+- - - - - - - -

    // ILL and ILP are optional, PoC is not supporting these two fields.

    // Call base-class Encoder function

    CAmrPayloadHeader::Encode( aBuffer, aByteIndex, aBitIndex ); 

    TStreamEncoder encoder;

    encoder.Initialize( aBuffer, aByteIndex, aBitIndex );

    encoder.Encode( 0, KNumValue4 ); // 4 Reserved bits

    // Update Byte and Bit positions

    aByteIndex = encoder.ByteIndex( );

    aBitIndex = encoder.BitIndex( );

    }

// ---------------------------------------------------------------------------

// CAmrPayloadHeaderOA::Decode

// Decode the payload header from a given buffer at the given position.

// ---------------------------------------------------------------------------

//

void CAmrPayloadHeaderOA::Decode( const TUint8* aBuffer, 

    TInt& aByteIndex, TInt& aBitIndex )

    {

    DP_AMR_ENCODE( "CAmrPayloadHeaderOA::Decode" );

    // Call base-class Decoder function

    CAmrPayloadHeader::Decode( aBuffer, aByteIndex, aBitIndex );

    TStreamDecoder decoder;

    decoder.Initialize( aBuffer, aByteIndex, aBitIndex );

    decoder.Decode( KNumValue4 );    // skip 4 Reserved bits

    // Update Byte and Bit positions

    aByteIndex = decoder.ByteIndex( );

    aBitIndex = decoder.BitIndex( );

    }