--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmserv/voipaudioservices/inc/JitterBufferObserver.h	Tue Feb 02 01:08:46 2010 +0200
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2008 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 Jitter buffer.
+ *
+ */
+
+#ifndef JITTERBUFFER_OBS_H
+#define JITTERBUFFER_OBS_H
+
+class MJitterBufferObserver
+    {
+public:
+    enum TJBEvent
+        {
+        EGeneralError,
+        EBufferUnderflow,
+        EBufferOverflow,
+        EBufferConsumed,
+        EBufferReadyToPlay,
+        EConcealErrorForNextBuffer
+        };
+
+    /**
+     * Callback function to receive jitter buffer error events.
+     */
+    virtual void EventJB(TInt aEventType, TInt aError = KErrNone) = 0;
+
+    /**
+     * Callback function for codec reconfiguration for dynamic
+     * buffer size adjustment.
+     * @since S60 v5.0
+     * @param aBufferSize Buffer size request in samples.
+     *
+     virtual void DynamicBufferChangeRequest(TInt aBufferSize) = 0;
+     */
+
+    };
+
+#endif  // JITTERBUFFER_OBS_H
+// End of file