1 /*

     2 * Copyright (c) 2002 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:  Base class for RateControl implementations.

    15 *

    16 */

    17 

    18 

    19 #ifndef CMMARATECONTROL_H

    20 #define CMMARATECONTROL_H

    21 

    22 // EXTERNAL INCLUDES

    23 

    24 //  INTERNAL INCLUDES

    25 #include "cmmacontrol.h" // base class

    26 

    27 // CONSTANTS

    28 

    29 static const TInt KMMADefaultRate = 100000;

    30 static const TInt KMMAMinRate = 0;

    31 

    32 // Constant for control name. Name is used in Java side to instantiate

    33 // Java Class which uses CMMARateControl.

    34 _LIT(KMMARateControlName, "RateControl");

    35 

    36 

    37 //  CLASS DECLARATION

    38 /**

    39 *   This class is the base class for RateControl implementations.

    40 *

    41 *

    42 */

    43 NONSHARABLE_CLASS(CMMARateControl): public CMMAControl

    44 {

    45 public:

    46     /**

    47      * Destructor.

    48      */

    49     ~CMMARateControl();

    50 

    51 protected:

    52     /**

    53      * Constructor.

    54      */

    55     CMMARateControl();

    56 

    57 public: // From CMMAControl

    58     virtual const TDesC& ClassName() const;

    59 

    60 public: // New methods

    61     /**

    62      * @param aRate Rate to set in "milli-percentage"..

    63      * @return Actual rate set.

    64      */

    65     virtual TInt SetRateL(TInt aRate) = 0;

    66 

    67     /**

    68      * @return The current playback rate in "milli-percentage".

    69      */

    70     virtual TInt RateL() = 0;

    71 

    72     /**

    73      * @return The maximum rate supported.

    74      */

    75     virtual TInt MaxRateL();

    76 

    77     /**

    78      * @return The minimum rate supported.

    79      */

    80     virtual TInt MinRateL();

    81 

    82 };

    83 

    84 

    85 #endif // CMMARATECONTROL_H