// Copyright (c) 2006-2009 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:

 //

 #ifndef MDFPLAYERENGINE_H

 #define MDFPLAYERENGINE_H

 #include <e32base.h>

 class MMdfVideoPlayerHwDeviceObserver

 	{

 public:

 	/** Get system time. May come from a local or external source.

 	@return The system time as a TUint.

 	*/

 	virtual TUint Time() const = 0;

 	/** 

 	Is a frame (a decoded picture) available.

 	@return ETrue if a frame is available.

 	*/

 	virtual TBool FrameAvailable() const = 0;

 	/** 

 	Displays a frame.

 	*/

 	virtual void DisplayFrame() = 0;

 	/** 

 	Discards a frame.

 	*/

 	virtual void DiscardFrame() = 0;

 	};

 /**

 Video player engine.

 This manages the playing of decoded frames for the DevVideo hardware device.

 @internalComponent

 */

 class CMdfVideoPlayerEngine : public CBase

 	{

 public:

 	static CMdfVideoPlayerEngine* NewL(MMdfVideoPlayerHwDeviceObserver& aDeviceObserver);

 	~CMdfVideoPlayerEngine();

 	void StartL(TUint aFrameRate);

 	void Stop();

 	TInt FrameRate();

 	TInt FrameCount();

 private:

 	CMdfVideoPlayerEngine(MMdfVideoPlayerHwDeviceObserver& aDeviceObserver);

 	void ConstructL();

 	static TInt DisplayFrame(TAny* aObject);

 	void DoDisplayFrame();

 public:

 	// indicate that player should run unsynchronized

 	static const TInt KUnsynchronized = -1;

 private:

 	// the maximum frame rate of the engine, in fps

 	// NB the actual maximum frame rate of the decoder may be higher.

 	static const TInt KMaxFrameRate = 100;

 	// tick timer to manage playback

 	CPeriodic* iTimer;

 	TUint iStartTime;

 	// actual frame rate

 	TInt iFrameRate;

 	// count of frames processed by the engine

 	TInt iFrameCount;

 	// the HwDevice observer

 	MMdfVideoPlayerHwDeviceObserver& iDeviceObserver;

 	};

 #endif // MDFPLAYERENGINE_H