/*

* Copyright (c) 2005-2006 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:    Decoder capable to handle redundancy format RTP payload.

*

*/

#ifndef MCCREDDECODER_H

#define MCCREDDECODER_H

//  INCLUDES

#include    "mccredencdecbase.h"

/**

*  Redundancy RTP payload format decoder.

*

*  @lib mmccredplformat.dll

*  @since Series 60 3.0

*/

class CMccRedDecoder : public CMccRedEncDecBase

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CMccRedDecoder* NewL();

        /**

        * Destructor.

        */

        virtual ~CMccRedDecoder();

    public: // New functions

        /**

        * Decode encoding(s) from RTP payload given.

        * @since    Series 60 3.0

        * @param    aCurTimeStamp   Timestamp of the RTP packet under decoding

        * @return   Number of data blocks decoded or system wide error code.

        */

        TInt DecodePayload( TUint aCurTimeStamp );

    private:    // Functions from base classes

        /**

        * From CMccRedEncDecBase. Initializes decoder.

        */

        void DoInitializeL( TInt aRedBlockCount, TInt aMaxPayloadSize,

            TInt aNumOfEncodings );

    private:

        class TRedHeaderInfo

            {

            public:

                TUint8 iBlockPT;

                TUint iTimeStamp;

                TUint iBlockLength;

                TUint8* iBlockIndex;

            };

        /**

        * C++ default constructor.

        */

        CMccRedDecoder();

        /**

        * Get info about audio data blocks in a RTP payload buffer

        */

        TInt GetBlockInfos( RArray<TRedHeaderInfo>& aBlockInfos,

                            const TDesC8& aRTPPayload );

    private:    // Data

         // Time stamp from the RTP header

         TUint iCurTimeStamp;

         // Contains primary data blocks timestamp from previous RTP payload

         TInt iLatestTimeStamp;

         // Used to carry block indexes, block lengths etc.

         RArray<TRedHeaderInfo> iRedHeaderInfo;

    };

#endif      // MCCREDDECODER_H   

// End of File