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:  Abstract base class for FramePositioningControl

    15 *

    16 */

    17 

    18 

    19 #ifndef CMMAFRAMEPOSITIONINGCONTROL_H

    20 #define CMMAFRAMEPOSITIONINGCONTROL_H

    21 

    22 // EXTERNAL INCLUDES

    23 #include "mmf/common/mmfcontroller.h"

    24 #include "mmf/common/mmfstandardcustomcommands.h"

    25 

    26 //  INTERNAL INCLUDES

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

    28 

    29 // FORWARD DECLARATIONS

    30 class CMMAPlayer;

    31 

    32 // CONSTANTS

    33 

    34 

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

    36 // Java Class which uses CMMAFramePositioningControl.

    37 _LIT(KMMAFramePositioningControlName, "FramePositioningControl");

    38 

    39 //  CLASS DECLARATION

    40 /**

    41 *   Abstract base class for FramePositioningControls

    42 */

    43 NONSHARABLE_CLASS(CMMAFramePositioningControl): public CMMAControl

    44 {

    45 public:

    46     /**

    47      * Destructor.

    48      */

    49     ~CMMAFramePositioningControl();

    50 

    51 protected:

    52     /**

    53      * Constructor.

    54      */

    55     CMMAFramePositioningControl(CMMAPlayer* aPlayer);

    56 

    57 public: // From CMMAControl

    58     const TDesC& ClassName() const;

    59 

    60 public: // New methods

    61     virtual TInt SeekL(TInt aFrameNumber) = 0;

    62     virtual TInt SkipL(TInt aFramesToSkip) = 0;

    63     virtual void MapFrameToTimeL(TInt aValue, TInt64* aMediaTime) = 0;

    64     virtual TInt MapTimeToFrameL(TInt64* aMediaTime) = 0;

    65 

    66 protected: // New methods

    67 

    68     /**

    69      * Clamp media time between 0 and duration of media

    70      * @param aMediaTime media time value to clamp

    71      * @return KErrNotFound if duration of media is not known,

    72      *         otherwise KErrNone.

    73      */

    74     virtual TInt ClampMediaTime(TInt64& aMediaTime);

    75 

    76 private: // Data

    77 

    78     // To be used by this class and not by children.

    79     CMMAPlayer* iPlayer;

    80 

    81 };

    82 

    83 #endif // CMMAFRAMEPOSITIONINGCONTROL_H