diff -r 000000000000 -r bde4ae8d615e os/mm/devsoundextensions/effects/DistAtten/DistanceAttenuationProxy/Src/DistanceAttenuationEventObserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/mm/devsoundextensions/effects/DistAtten/DistanceAttenuationProxy/Src/DistanceAttenuationEventObserver.cpp	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,151 @@
+/*
+* Copyright (c) 2004 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:   Implementation of the active event observer.
+*
+*/
+
+
+
+
+// INCLUDE FILES
+#ifdef _DEBUG
+#include 	<e32svr.h>
+#endif
+
+#include 	"DistanceAttenuationEventObserver.h"
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::CDistanceAttenuationEventObserver
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CDistanceAttenuationEventObserver::CDistanceAttenuationEventObserver()
+    :   CActive(CActive::EPriorityStandard),
+    	iStopped(EFalse)
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CDistanceAttenuationEventObserver::ConstructL(
+	TMMFMessageDestinationPckg aMessageHandler,
+	MCustomCommand& aCustomCommand,
+	MDistanceAttenuationCallback& aCallback )
+    {
+    CActiveScheduler::Add(this);
+	iMessageHandler = aMessageHandler;
+	iCustomCommand = &aCustomCommand;
+	iCallback = &aCallback;
+	}
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CDistanceAttenuationEventObserver* CDistanceAttenuationEventObserver::NewL(
+	TMMFMessageDestinationPckg aMessageHandler,
+	MCustomCommand& aCustomCommand,
+	MDistanceAttenuationCallback& aCallback )
+    {
+    CDistanceAttenuationEventObserver* self = new(ELeave) CDistanceAttenuationEventObserver();
+    CleanupStack::PushL(self);
+    self->ConstructL(aMessageHandler, aCustomCommand, aCallback);
+    CleanupStack::Pop(self);
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::~CDistanceAttenuationEventObserver
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CDistanceAttenuationEventObserver::~CDistanceAttenuationEventObserver()
+    {
+    // We should not have to cancel the outstanding request because the message
+    // handler will complete our request with KErrCancel in its destructor.
+    Cancel();
+    }
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::Start
+// Kickoff the event observer by issuing the first observation message.
+// -----------------------------------------------------------------------------
+//
+void CDistanceAttenuationEventObserver::Start()
+    {
+	if( !iStopped && !IsActive() )
+		{
+    	iCustomCommand->CustomCommandAsync(iMessageHandler, (TInt)EDaefObserve, KNullDesC8, KNullDesC8, iDataPckgFrom, iStatus);
+    	iStopped = EFalse;
+    	SetActive();
+		}
+    }
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::Stop
+// -----------------------------------------------------------------------------
+//
+void CDistanceAttenuationEventObserver::Stop()
+    {
+	iStopped = ETrue;
+    }
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::RunL
+// Invoke by the active scheduler when a request completes, In this case, our
+// observation message has completed.
+// The proxy is notified. Afterwards, reissue the request to continue observation.
+// -----------------------------------------------------------------------------
+//
+void CDistanceAttenuationEventObserver::RunL()
+    {
+#ifdef _DEBUG
+    RDebug::Print(_L("CDistanceAttenuationEventObserver::RunL()\n"));
+#endif
+
+	if( iStatus == KErrNone )
+		{
+		iCallback->DistanceAttenuationEvent(iDataPckgFrom);
+		Start();
+		}
+	else
+		{
+		iStopped = ETrue;
+		}
+    }
+
+// -----------------------------------------------------------------------------
+// CDistanceAttenuationEventObserver::DoCancel
+// Cancels the current and any on going requests/tasks.
+// -----------------------------------------------------------------------------
+//
+void CDistanceAttenuationEventObserver::DoCancel()
+    {
+#ifdef _DEBUG
+    RDebug::Print(_L("CDistanceAttenuationEventObserver::DoCancel()\n"));
+#endif
+    iStopped = ETrue;
+    }
+
+// End of file
+