/*

* 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:    

*

*/

// INCLUDE FILES

#include "amrtocentry.h"

#include "amrpayloadformatter.h"

#include "streamformatter.h"

// CONSTANTS

const TUint KFTFieldBits = 4;

const TUint KFrameFollowedBits = 1;

const TUint KQualityIndBits = 1;

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

// CAmrTocEntry::CAmrTocEntry

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

// might leave.

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

//

CAmrTocEntry::CAmrTocEntry() : iFrameFollowed( 1 ),

    iFrameType( EAmrFrame5_15 ), iFrameQualityInd( 1 ) 

    {

    DP_AMR_ENCODE( "CAmrTocEntry::CAmrTocEntry" );        

    }

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

// CAmrTocEntry::NewL

// Two-phased constructor.

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

//

CAmrTocEntry* CAmrTocEntry::NewL()

    {

    DP_AMR_ENCODE( "CAmrTocEntry::NewL" );   

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

    return self;

    }

// Destructor

CAmrTocEntry::~CAmrTocEntry()

    {

    DP_AMR_ENCODE( "CAmrTocEntry::~CAmrTocEntry" );

    }

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

// CAmrTocEntry::Encode

// Encode the `table of contents' ( TOC ) entry fields into a given buffer.

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

//

void CAmrTocEntry::Encode( TUint8* aBuffer,

        TInt& aByteIndex, TInt& aBitIndex )

    {

    DP_AMR_ENCODE( "CAmrTocEntry::Encode" );

    TStreamEncoder encoder;

    encoder.Initialize( aBuffer, aByteIndex, aBitIndex );

    // In bandwidth-efficient mode, a TOC entry takes the following format

    //   0 1 2 3 4 5

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

    //  |F|  FT   |Q|

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

    encoder.Encode( iFrameFollowed, KFrameFollowedBits );

    encoder.Encode( iFrameType, KFTFieldBits );

    encoder.Encode( iFrameQualityInd, KQualityIndBits );

    // Update Byte and Bit positions

    aByteIndex = encoder.ByteIndex( );

    aBitIndex = encoder.BitIndex( );

    }

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

// CAmrTocEntry::Decode

// Decode the `table of contents' ( TOC ) entry fields from a given buffer at

// the given position.

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

//

void CAmrTocEntry::Decode( const TUint8* aBuffer, 

        TInt& aByteIndex, TInt& aBitIndex )

    {

    DP_AMR_ENCODE( "CAmrTocEntry::Decode" );

    TStreamDecoder decoder;

    decoder.Initialize( aBuffer, aByteIndex, aBitIndex );

    // In bandwidth-efficient mode, a TOC entry takes the following format

    //   0 1 2 3 4 5

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

    //  |F|  FT   |Q|

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

    iFrameFollowed = TUint8( decoder.Decode( KFrameFollowedBits ) );

    iFrameType = TAmrFrameType( decoder.Decode( KFTFieldBits ) );

    iFrameQualityInd = TUint8( decoder.Decode( KQualityIndBits ) );

    // Update Byte and Bit positions

    aByteIndex = decoder.ByteIndex( );

    aBitIndex = decoder.BitIndex( );

    }