/*

* Copyright (c) 2002-2006 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:    PayloadFormat plugin capable to read RTP payload containing

*                AMR audio.

*

*/

// INCLUDE FILES

#include "amrpayloadformatter.h"

#include "amrcommonutil.h"

// CONSTANTS

// ============================= LOCAL FUNCTIONS ===============================

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

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

// CAmrPayloadFormatter::CAmrPayloadFormatter

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

// might leave.

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

//

CAmrPayloadFormatter::CAmrPayloadFormatter( TBool aIsNb )

  : iIsNb( aIsNb ), 

    iChannelCount( 1 ),

    iFrameBlockCount( 1 ),

    iFrameCount( iChannelCount * iFrameBlockCount ),

    iModeRequest( EAmrModeReqNone ),

    iPayloadPtr( 0, 0, 0 )

    {}

// Destructor

CAmrPayloadFormatter::~CAmrPayloadFormatter( )

    {

    iPayload = NULL;

    iFrameDatas.ResetAndDestroy();

    }

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

// CAmrPayloadFormatter::Initialize

// Initialize formatter. MUST be done always when starting decoding/encoding

// possibly after pause/stop. Redundant frames collected so far are destroyed as

// well as frames received for redundancy detection.

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

//

void CAmrPayloadFormatter::Initialize()

    {

    iFrameDatas.ResetAndDestroy();

    DoInitialize();

    }

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

// CAmrPayloadFormatter::SetPayloadBuffer

// Set payload buffer.

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

//

void CAmrPayloadFormatter::SetPayloadBuffer( TDes8& aBuffer )

    {

    iPayload = const_cast<TUint8*>( aBuffer.Ptr( ) );

    iPayloadSize = aBuffer.Length( );

    iPayloadPtr.Set( iPayload, aBuffer.Length( ), aBuffer.MaxLength( ) );

    }

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

// CAmrPayloadFormatter::SetChannelCount

// Set number of audio channels.

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

//

TInt CAmrPayloadFormatter::SetChannelCount( TInt aChannelCount )

    {

    if ( KMaxChannelCount < aChannelCount || aChannelCount < 1 )

        {

        return KErrArgument;

        }

    iChannelCount = aChannelCount;

    iFrameCount = iChannelCount * iFrameBlockCount;

    return KErrNone;

    }

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

// CAmrPayloadFormatter::SetFramesBlockCount

// Set number of AMR frame blocks included in one RTP packet.

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

//

TInt CAmrPayloadFormatter::SetFrameBlockCount( TInt aFrameblockCount )

    {

    if ( KMaxFrameBlocksPerPacket < aFrameblockCount || aFrameblockCount < 1 )

        {

        return KErrArgument;

        }

    iFrameBlockCount = aFrameblockCount;

    iFrameCount = iChannelCount * iFrameBlockCount;

    return KErrNone;

    }

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

// CAmrPayloadFormatter::SpeechBitCount

// Get number of speech bits in an AMR frame.

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

//

TInt CAmrPayloadFormatter::SpeechBitCount( enum TAmrFrameType aFrameType ) const

    {

    if ( iIsNb )

    	{

	    if ( aFrameType > EAmrFrameSid)

	        {

	        return 0;

	        }

		else        

	        {

		    return KAmrNbTotalSpeechBits[TInt( aFrameType )];

	        }

    	}

    else

    	{

	    if ( aFrameType > EAmrWbFrameSid)

	        {

	        return 0;

	        }

		else        

	        {

		    return KAmrWbTotalSpeechBits[TInt( aFrameType )];

	        }

    	}

    }

// ========================== OTHER EXPORTED FUNCTIONS =========================

//  End of File