--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmappfw_plat/mpx_playback_common_definition_api/inc/mpxplaybackengineobserver.h	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,113 @@
+/*
+* Copyright (c) 2006 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:  playback engine observer.
+*
+*/
+
+
+
+#ifndef MMPXPLAYBACKENGINEOBSERVER_H
+#define MMPXPLAYBACKENGINEOBSERVER_H
+
+// INCLUDES
+#include <e32base.h>
+#include <mpxplaybackframeworkdefs.h>
+#include <mpxmessage2.h>
+#include <mpxcommand.h>
+
+// FORWARD DECLARATIONS
+class CMPXMedia;
+
+/**
+*  Interface for handling active engine.
+*
+*  @lib mpxcommon.lib
+*/
+NONSHARABLE_CLASS(MMPXPlaybackEngineObserver)
+    {
+public:
+    /**
+    *  Handle playback property.
+    *
+    *  @since S60 3.2.3
+    *  @param aProperty the property
+    *  @param aValue the value of the property
+    *  @param aError error code
+    */
+    virtual void HandleProperty(TMPXPlaybackProperty aProperty,
+                                TInt aValue, 
+                                TInt aError) = 0;
+    
+    /**
+    *  Method is called continously until aComplete=ETrue, signifying that 
+    *  it is done and there will be no more callbacks.
+    *  Only new items are passed each time.
+    *
+    *  @since S60 3.2.3
+    *  @param aPlayer UID of the subplayer
+    *  @param aSubPlayers a list of sub players
+    *  @param aComplete ETrue no more sub players. EFalse more subplayer
+    *                   expected
+    *  @param aError error code
+    */
+    virtual void HandleSubPlayerNames(TUid aPlayer, 
+                                      const MDesCArray* aSubPlayers,
+                                      TBool aComplete,
+                                      TInt aError) = 0;
+    
+    /** 
+    * 
+    *  Call back of media request.
+    * 
+    *  @since S60 3.2.3
+    *  @param aMedia media 
+    *  @param aError error code  
+    *  
+    *  @deprecated Use method MMPXPlaybackEngineObserver::HandleMedia(
+    *         CMPXMedia* aMedia, TInt aError) instead.
+    *
+    */
+    virtual void HandleMedia(const CMPXMedia& aMedia,
+                             TInt aError)
+        {
+        HandleMedia(const_cast<CMPXMedia*>(&aMedia), aError);
+        }
+
+    /**  
+    *  Call back of media request.
+    *
+    *  @since S60 3.2.3
+    *  @param aMedia media object. Ownership not transferred.
+    *  @param aError error code
+    */
+     virtual void HandleMedia(CMPXMedia* /*aMedia*/,
+                              TInt /*aError*/)
+         {
+         // Note: change it into pure virtual after plugins update
+         }
+    
+    /**
+    *  Handle completion of a asynchronous command.
+    *
+    *  @since S60 3.2.3
+    *  @param aCommandResult result of the command, NULL if error
+    *  @param aError error code    
+    */
+    virtual void HandlePlaybackCommandComplete(CMPXCommand* /*aCommandResult*/, 
+                                               TInt /*aError*/) {} 
+    };
+          
+#endif // MMPXPLAYBACKENGINEOBSERVER_H
+            
+// End of File