--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmdevicefw/mdf/src/video/hwdevicevideoutils/mdfplayerengine.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,183 @@
+// 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:
+//
+
+#include <e32debug.h>
+
+#include "mdfplayerengine.h"
+
+#if defined (SYMBIAN_MDFPLAYERENGINE_DEBUG)
+#define DEBUG_PRINT RDebug::Print
+#else
+#define DEBUG_PRINT
+#endif // defined(SYMBIAN_MDFPLAYERENGINE_DEBUG)
+
+const TInt KOneSecond = 1000000;
+
+/* 
+ Constructs a new instance of CMdfVideoPlayerEngine.
+ @return    "CMdfVideoPlayerEngine*"
+            A pointer to the newly constructed CMdfVideoPlayerEngine
+ */
+CMdfVideoPlayerEngine* CMdfVideoPlayerEngine::NewL(MMdfVideoPlayerHwDeviceObserver& aDeviceObserver)
+	{
+	CMdfVideoPlayerEngine* self = new (ELeave) CMdfVideoPlayerEngine(aDeviceObserver);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop(self);
+	return self;	
+	}
+
+
+/** 
+ Constructs and initialises a new instance of CMdfVideoPlayerEngine.
+ 
+ @param     "MMdfVideoPlayerHwDeviceObserver& aDeviceObserver"
+            A reference to the HwDevice on which it will operate
+ */
+CMdfVideoPlayerEngine::CMdfVideoPlayerEngine(MMdfVideoPlayerHwDeviceObserver& aDeviceObserver)
+	: iDeviceObserver(aDeviceObserver)
+	{	
+	}
+
+
+void CMdfVideoPlayerEngine::ConstructL()
+	{
+	iTimer = CPeriodic::NewL(EPriorityHigh);		
+	}
+
+/** 
+ Default destructor
+ */
+CMdfVideoPlayerEngine::~CMdfVideoPlayerEngine()
+	{
+	// stop if we need to
+	Stop();
+	}
+
+/** 
+ Starts the player engine.
+ 
+ @param     "TUint aFrameRate"
+            The actual frame rate for display, or KUnsynchronized
+ @leave		May leave with KErrNotReady if the frame rate is not initialized.            
+ */
+void CMdfVideoPlayerEngine::StartL(TUint aFrameRate)
+	{
+	if(aFrameRate == 0) 
+		{
+		User::Leave(KErrNotReady);
+		}
+	
+	iFrameRate = aFrameRate;
+	
+	// get current tick count, save this
+	iStartTime = iDeviceObserver.Time();
+	iFrameCount = 0;
+	
+	DEBUG_PRINT(_L("+++ PlayerEngine: Starting"));
+    iTimer->Cancel();
+    iTimer->Start(KMaxFrameRate, KMaxFrameRate, TCallBack(DisplayFrame, this));
+	}
+      
+/** 
+ Stops the player engine.
+ */
+void CMdfVideoPlayerEngine::Stop()
+	{
+	if(iTimer) 
+		{
+		DEBUG_PRINT(_L("+++ PlayerEngine: Stopping"));
+	    iTimer->Cancel();
+	    delete iTimer;
+	    iTimer = NULL;
+		}
+	}
+	
+/**
+ Returns the frame rate.
+ 
+ @return The frame rate.
+*/	
+TInt CMdfVideoPlayerEngine::FrameRate()
+	{
+	return iFrameRate;
+	}
+	
+/**
+ Returns the frame count.
+ 
+ @return The frame count.
+*/	
+TInt CMdfVideoPlayerEngine::FrameCount()
+	{
+	return iFrameCount;
+	}
+
+/** 
+ Static callback method for the CPeriodic timer
+ */
+TInt CMdfVideoPlayerEngine::DisplayFrame(TAny* aObject)
+	{
+    // cast, and call non-static function
+    (reinterpret_cast<CMdfVideoPlayerEngine*>(aObject))->DoDisplayFrame();
+    return KErrNone;
+	}
+
+/** 
+ Processes one frame if available.
+ */
+void CMdfVideoPlayerEngine::DoDisplayFrame()
+	{
+	if(iDeviceObserver.FrameAvailable()) 
+		{
+		// if we're playing unsynchronized, then return the frame
+		// regardless of time
+		if(iFrameRate == KUnsynchronized) 
+			{
+			iFrameCount++;	
+			DEBUG_PRINT(_L("+++ PlayerEngine: Sending frame buffer to DevVideo"));
+			iDeviceObserver.DisplayFrame();
+			}
+		else 
+			{
+			TUint curPlayTime = iDeviceObserver.Time();
+		
+			// if we've missed a tick, then discard the frame.
+			// (unless it's the first frame; always display this)
+			if(iFrameCount) 
+				{
+				TUint nextNextFrameTime = iStartTime + ((iFrameCount + 1) * (KOneSecond / iFrameRate));
+				if(nextNextFrameTime <= curPlayTime) 
+					{
+					iFrameCount++;	
+					DEBUG_PRINT(_L("+++ PlayerEngine: Discarding frame buffer"));
+					iDeviceObserver.DiscardFrame();
+					return;
+					}
+				}
+			// else if we're past the expected display time
+			// then display the frame.
+			TUint nextFrameTime = iStartTime + (iFrameCount * (KOneSecond / iFrameRate));
+			if(!iFrameCount || nextFrameTime <= curPlayTime) 
+				{
+				iFrameCount++;	
+				DEBUG_PRINT(_L("+++ PlayerEngine: Sending frame buffer to DevVideo"));
+				iDeviceObserver.DisplayFrame();
+				}
+			}
+		}
+	}
+
+// end