1 /*

     2 * Copyright (c) 2009 Aricent and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "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 * Aricent - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 * Declares interface class MBaseCodec whose pure virtual functions should be

    16 * implemented by all video encoder/decoder wrappers

    17 *

    18 */

    19 

    20 

    21 #ifndef ARIBASECODEC_H

    22 #define ARIBASECODEC_H

    23 

    24 #include <E32def.h>

    25 

    26 class MBaseCodec

    27 	{

    28 	public:

    29 		/**

    30 		 * This enumeration should be used to indicate the result

    31 		 * of a call to DoProcessL

    32 		 */

    33 		enum TCodecState {

    34 			EInputConsumed,

    35 			EOutputConsumed,

    36 			EConsumed,

    37 			ENotConsumed

    38 			};

    39 	public:

    40 

    41 		/**

    42 		 * Processes an input buffer , returns one of the TCodecState

    43 		 * @param aInpBuf

    44 		 *    Coded input data

    45 		 * @param aOutBuf

    46 		 *    Decoded output data

    47 		 * @leave The method will leave if an error occurs

    48 		 * @return one of the TCodecState members

    49 		 */

    50 		virtual TInt DoProcessL( TAny *aInpBuf, TAny* aOutBuf = NULL ) = 0;

    51 

    52 		/**

    53 		 * Used to set codec parameteres

    54 		 * @param aCommand

    55 		 *    Indicates the encoder parameter to set

    56 		 * @param aCmdData

    57 		 *    The value to which the encoder parameter should be set

    58 		 * @return symbian wide error code

    59 		 */

    60 		virtual TInt SetParam( TInt aCommand, TAny* aCmdData ) = 0;

    61 

    62 		/**

    63 		 * Used to get codec parameteres

    64 		 * @param aCommand

    65 		 *    Indicates the encoder parameter to get

    66 		 * @param aCmdData

    67 		 *    The value of the encoder parameter (OUT)

    68 		 * @return symbian wide error code

    69 		 */

    70 		virtual TInt GetParam( TInt aCommand, TAny* aCmdData ) = 0;

    71 

    72 		/**

    73 		 * Cancels all processing of the commands

    74 		 */

    75 		virtual void Reset() = 0;

    76 

    77 	};

    78 

    79 #endif //ARIBASECODEC_H

    80 

    81