/*

* 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:    Formatter classes for decoding of RTP payload format

*                for AMR ( wide band ) audio codecs.

*

*/

#ifndef AMRPAYLOADDECODEROA_H

#define AMRPAYLOADDECODEROA_H

// INCLUDES

#include <e32std.h>

#include "amrpayloaddecoder.h"

#include "amrpayloadheaderoa.h"

#include "amrtocentryoa.h"

#include "amrframe.h"

/**

* The Amr payload decoder for octet aligned ( OA ) mode.

*

* @lib Mccamrplformat.dll

* @since Series 60 3.1

*/

class CAmrPayloadDecoderOA : public CAmrPayloadDecoder

    {

public:  // Constructors and destructor

    /**

    * Two-phased constructor.

    */

    static CAmrPayloadDecoderOA* NewL( TBool aIsNb );

    /**

    * Destructor.

    */

    ~CAmrPayloadDecoderOA();

public: // Functions

    /**

    * Decode payload data received in the payload buffer. If AMR FEC is 

    * used and redundant frames are discarded, time stamp is increased to

    * correspond start of remaining frames.

    * @since    Series 60 3.1

    * @param    aTimeStamp Time stamp from RTP header

    * @param    aTimeStampInc Unit for time stamp incrementing

    * @return   TInt - Number of AMR frames decoded

    */

    virtual TInt DecodePayload( TUint32& aTimeStamp, TUint32 aTimeStampInc );

private:

    /**

    * Constructor.

    */

    CAmrPayloadDecoderOA( TBool aIsNb );

    /**

    * By default Symbian 2nd phase constructor is private.

    */

    void ConstructL();

protected:

    /**

    * Calculate frames' starting Byte and Bit positions in a given payload

    * buffer and update `iFrames' array with the frames' positions.

    * @since    Series 60 3.1

    * @param    aBuffer - [input] Payload buffer.

    * @param    aFrameCount - [input] Number of frames included in the

    *           payload buffer.

    */

    virtual void CalculateFramePosition( const TUint8* aBuffer,

        TInt aFrameCount );

    };

#endif  // AMRPAYLOADDECODEROA_H