/*

* 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:    Base functionality common for redundancy RTP payload encoder 

*                and decoder.

*

*/

#ifndef MCCREDENCDECBASE_H

#define MCCREDENCDECBASE_H

//  INCLUDES

#include <e32base.h>

// CONSTANTS

const TInt  KMaxNumOfEncodings  =   3;

const TInt  KPayloadNotDefined  =   128;

// DATA TYPES

enum TMccRedEncoding

    {

    EMccPrimaryEncoding     =   0,

    EMccSecondaryEncoding,

    EMccTertiaryEncoding,

    EMccRTPPayload

    };

// FORWARD DECLARATIONS

class CMMFDataBuffer;

// CLASS DECLARATION

/**

*  Base class for redundancy RTP payload format encoder/decoder.

*

*  @lib mmccredplformat.dll

*  @since Series 60 3.0

*/

class CMccRedEncDecBase : public CBase

    {

    public:  // Constructors and destructor

        /**

        * Destructor.

        */

        virtual ~CMccRedEncDecBase();

    public: // New functions

        /**

        * Set encoding, which is wanted to encode/decode.

        * @since    Series 60 3.0

        * @param    aEncoding       Identifies, which kind of encoding is set

        * @param    aEncodingBuf    Buffer holding encoding

        * @return   void

        */

        virtual void SetEncodingBlockL( TMccRedEncoding aEncoding,

                                        TDesC8& aEncodingBuf );

        /**

        * Get encoding specified with parameter.

        * @since    Series 60 3.0

        * @param    aEncoding       Identifies, which kind of encoding is get

        * @param    aToBuffer       Buffer where to place data

        * @return   void

        */                                     

        virtual void GetEncodingBlockL( TMccRedEncoding aEncoding, 

                                        TDes8& aToBuffer );

        /**

        * Initialize after enc/dec parameters are changed or stream is

        * started again after pause.

        *

        * @since    Series 60 3.0

        * @param    aRedCount           Number of redundant blocks to handle

        * @param    aMaxPayloadSize     Maximum size of the pure RTP payload

        * @param    aNumOfEncodings     Number of encodings to handle

        * @return   void

        */

        virtual void InitializeL( TInt aRedCount, TInt aMaxPayloadSize,

            TInt aNumOfEncodings );

        /**

        * Set payload types to wait for.

        * @since    Series 60 3.0

        * @param    aPayloadTypes       Payload types

        * @return   System wide error code

        */

        virtual TInt SetPayloadTypes( RArray<TUint>& aPayloadTypes );

    protected:  // New functions

        /**

        * C++ default constructor.

        */

        CMccRedEncDecBase();

    private:

        virtual void DoInitializeL( TInt aRedCount, TInt aMaxPayloadSize,

            TInt aNumOfEncodings ) = 0;

    protected:  // Data

        // Number of redundant data blocks included in one RTP payload

        TInt iRedBlockCount;

        // Maximum size of the RTP payload in bytes to handle

        TInt iMaxPayloadSize;

        // Buffer where to handle whole RTP payload including redundancy

        CMMFDataBuffer* iRTPPayload;

        // Payload types for all encodings

        TFixedArray< TUint8, KMaxNumOfEncodings > iPayloadTypes;

        // Encodings, which are included in RTP payload

        TFixedArray< CMMFDataBuffer*, KMaxNumOfEncodings > iEncodings;

    };

#endif      // MCCREDENCDECBASE_H   

// End of File