1 /*

     2 * Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:    Decoder capable to handle redundancy format RTP payload.

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 #ifndef MCCREDDECODER_H

    22 #define MCCREDDECODER_H

    23 

    24 //  INCLUDES

    25 #include    "mccredencdecbase.h"

    26 

    27 /**

    28 *  Redundancy RTP payload format decoder.

    29 *

    30 *  @lib mmccredplformat.dll

    31 *  @since Series 60 3.0

    32 */

    33 class CMccRedDecoder : public CMccRedEncDecBase

    34     {

    35     public:  // Constructors and destructor

    36         

    37         /**

    38         * Two-phased constructor.

    39         */

    40         static CMccRedDecoder* NewL();

    41         

    42         /**

    43         * Destructor.

    44         */

    45         virtual ~CMccRedDecoder();

    46 

    47     public: // New functions

    48         

    49         /**

    50         * Decode encoding(s) from RTP payload given.

    51         * @since    Series 60 3.0

    52         * @param    aCurTimeStamp   Timestamp of the RTP packet under decoding

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

    54         */

    55         TInt DecodePayload( TUint aCurTimeStamp );

    56 

    57     private:    // Functions from base classes

    58         

    59         /**

    60         * From CMccRedEncDecBase. Initializes decoder.

    61         */

    62         void DoInitializeL( TInt aRedBlockCount, TInt aMaxPayloadSize,

    63             TInt aNumOfEncodings );

    64             

    65     private:

    66 

    67         class TRedHeaderInfo

    68             {

    69             public:

    70                 TUint8 iBlockPT;

    71                 TUint iTimeStamp;

    72                 TUint iBlockLength;

    73                 TUint8* iBlockIndex;

    74             };

    75             

    76         /**

    77         * C++ default constructor.

    78         */

    79         CMccRedDecoder();

    80 

    81         /**

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

    83         */

    84         TInt GetBlockInfos( RArray<TRedHeaderInfo>& aBlockInfos,

    85                             const TDesC8& aRTPPayload );

    86 

    87     private:    // Data

    88          

    89          // Time stamp from the RTP header

    90          TUint iCurTimeStamp;

    91          

    92          // Contains primary data blocks timestamp from previous RTP payload

    93          TInt iLatestTimeStamp;

    94          

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

    96          RArray<TRedHeaderInfo> iRedHeaderInfo;

    97 

    98     };

    99 

   100 #endif      // MCCREDDECODER_H   

   101             

   102 // End of File