--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upnpframework/upnpcommand/inc/upnpimagerenderingengineobserver.h	Thu Dec 17 08:52:00 2009 +0200
@@ -0,0 +1,82 @@
+/*
+* Copyright (c) 2007 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:  observer for CUpnpImageRenderingEngine
+*
+*/
+
+
+#ifndef UPNP_IMAGERENDERINGENGINEOBSERVER_H
+#define UPNP_IMAGERENDERINGENGINEOBSERVER_H
+
+// INCLUDES
+#include <e32base.h>
+#include "upnpavrenderingsessionobserver.h" // base class
+#include "upnpitemresolverobserver.h" // base class
+
+// FORWARD DECLARATIONS
+class CUpnpAVDevice;
+class MUPnPAVController;
+class MUPnPAVRenderingSession;
+class MUPnPAVSessionBase;
+class MUPnPItemResolver;
+class CUPnPCommonUI;
+
+/**
+* Observer interface for image rendering engine.
+*
+* @since S60 3.2
+*/
+class MUpnpImageRenderingEngineObserver
+    {
+    public:
+
+        /**
+         * Requests for media to be rendered.
+         * this method is called soon after calling PlayL().
+         * the client is expected to provide an item resolver prepared with
+         * the media to be played back (but not resolved yet)
+         * ownership is transferred in this transaction.
+         * if client returns NULL playback will fail to KErrCancelled
+         * 
+         * @return the resolver representing media to be played
+         */
+        virtual MUPnPItemResolver* GetMedia() = 0;
+
+        /**
+         * Acknowledge for render request
+         * @param aError any errors that occurred
+         * @param aItem the actual item that is playing, trying to play, or
+         *        NULL if such is not available for some error condition
+		 * @return response error code
+		 *         KErrNone if the engine should carry on working
+		 *         KErrDisconnected if engine should disconnect
+         */
+        virtual TInt RenderAck(
+            TInt aError,
+            const CUpnpItem* aItem ) = 0; 
+
+        /**
+         * Notifies that rendering engine will shut down due to
+         * communication failure.
+         * @param aError the error code (some kind of reason)
+         */
+        virtual void EngineShutdown(
+            TInt aError ) = 0;
+            
+    };
+
+
+#endif // UPNP_IMAGERENDERINGENGINEOBSERVER_H
+
+// End of File