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// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#ifndef MDFPLAYERENGINE_H
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#define MDFPLAYERENGINE_H
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#include <e32base.h>
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class MMdfVideoPlayerHwDeviceObserver
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{
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public:
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/** Get system time. May come from a local or external source.
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@return The system time as a TUint.
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*/
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virtual TUint Time() const = 0;
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/**
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Is a frame (a decoded picture) available.
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@return ETrue if a frame is available.
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*/
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virtual TBool FrameAvailable() const = 0;
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/**
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Displays a frame.
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*/
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virtual void DisplayFrame() = 0;
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/**
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Discards a frame.
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*/
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virtual void DiscardFrame() = 0;
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};
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/**
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Video player engine.
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This manages the playing of decoded frames for the DevVideo hardware device.
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@internalComponent
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*/
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class CMdfVideoPlayerEngine : public CBase
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{
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public:
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static CMdfVideoPlayerEngine* NewL(MMdfVideoPlayerHwDeviceObserver& aDeviceObserver);
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~CMdfVideoPlayerEngine();
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void StartL(TUint aFrameRate);
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void Stop();
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TInt FrameRate();
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TInt FrameCount();
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private:
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CMdfVideoPlayerEngine(MMdfVideoPlayerHwDeviceObserver& aDeviceObserver);
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void ConstructL();
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static TInt DisplayFrame(TAny* aObject);
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void DoDisplayFrame();
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public:
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// indicate that player should run unsynchronized
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static const TInt KUnsynchronized = -1;
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private:
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// the maximum frame rate of the engine, in fps
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// NB the actual maximum frame rate of the decoder may be higher.
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static const TInt KMaxFrameRate = 100;
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// tick timer to manage playback
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CPeriodic* iTimer;
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TUint iStartTime;
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// actual frame rate
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TInt iFrameRate;
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// count of frames processed by the engine
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TInt iFrameCount;
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// the HwDevice observer
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MMdfVideoPlayerHwDeviceObserver& iDeviceObserver;
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};
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#endif // MDFPLAYERENGINE_H
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