diff -r 6369bfd1b60d -r 08b5eae9f9ff upnpavcontroller/upnprenderingstatemachine/inc/upnprenderingstatemachineobserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upnpavcontroller/upnprenderingstatemachine/inc/upnprenderingstatemachineobserver.h	Wed Nov 03 11:45:09 2010 +0200
@@ -0,0 +1,77 @@
+/*
+* Copyright (c) 2007,2009 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:  Observer for the generic upnp rendering state machine
+*
+*/
+
+#ifndef C_UPNPRENDERINGSTATEMACHINEOBSERVER_H
+#define C_UPNPRENDERINGSTATEMACHINEOBSERVER_H
+
+// INCLUDES
+#include <e32base.h>
+#include "upnprenderingstatemachineconstants.h" // for types
+
+// FORWARD DECLARATIONS
+
+// CONSTANTS
+
+
+/**
+ * Class for receiving callbacks from
+ * rendering state machine
+ *
+ * @lib upnprenderingstatemachine.lib
+ */
+class MUpnpRenderingStateMachineObserver
+    {
+public:
+
+    /**
+     * Indicates state machine has been synchronised with the renderer
+     * @param aError error that occurred during sync
+     */
+    virtual void RendererSyncReady( TInt aError,
+        Upnp::TState aState ) = 0;
+
+    /**
+     * Indicates renderer state has changed
+     * either by request or spontanelously.
+     * @param aError the error code
+     * @param aState the new state
+     * @param aUserOriented ETrue if this responds to a request
+     * @param aStateParam extra info depending on the state change
+     */
+    virtual void RenderingStateChanged(
+        TInt aError,
+        Upnp::TState aState,
+        TBool aUserOriented,
+        TInt aStateParam ) = 0;
+
+    /**
+     * Synchronises UI with media duration and current position
+     * this callback can be either automatic or explicitly requested
+     * @param aError error that occurred during position sync
+     * @param aMode mode in which the track is progressing
+     * @param aDuration media duration in milliseconds
+     * @param aPosition current position in milliseconds
+     */
+    virtual void PositionSync( TInt aError,
+        Upnp::TPositionMode aMode,
+        TInt aDuration, TInt aPosition ) = 0;
+
+    };
+
+
+#endif // C_UPNPRENDERINGSTATEMACHINEOBSERVER_H
+