--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mm_plat/audio_visualization_api/inc/MVisualizationObserver.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,113 @@
+/*
+* 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:  Definition of the Audio Visualization Observer class.
+*
+*/
+
+
+
+#ifndef MVISUALIZATIONOBSERVER_H
+#define MVISUALIZATIONOBSERVER_H
+
+class CVisualization;
+// CLASS DECLARATION
+
+
+class TVisualizationData
+    {
+    public:
+
+        /**
+        * Constructor.
+        */
+        TVisualizationData() { iFrequencyData = NULL, iWaveFormData = NULL; }
+
+		TUint64 iTimeStamp;
+		const TArray<TUint32>* iFrequencyData;
+		const TArray<TInt16>* iWaveFormData;
+
+    };
+
+
+/**
+*  Interface class to be implemented by objects that are interested in receiving notifications
+*  from Audio Visualization object.
+*
+*  @since 3.0
+*/
+class MVisualizationObserver
+    {
+    public:
+
+        /**
+        * Invoked when the state of the visualization object has changed.
+        * @since 3.0
+        * @param aVisualization The visualization object that changed
+        * @param aData The visualization data.
+        */
+        virtual void DataChanged( const CVisualization* aVisualization, TVisualizationData aData ) = 0;
+
+     	/**
+        * Invoked when the visualization data rate changed.
+        * @since 3.0
+        * @param aVisualization The visualization object that changed
+        * @param aData The visualization data.
+        */
+        virtual void DataRateChanged( const CVisualization* aVisualization ) = 0;
+
+     	/**
+        * Invoked when the visualization frequency band count changed.
+        * @since 3.0
+        * @param aVisualization The visualization object that changed
+        * @param aData The visualization data.
+        */
+        virtual void FrequencyBandCountChanged( const CVisualization* aVisualization ) = 0;
+
+     	/**
+        * Invoked when the visualization is preempted.
+        * @since 3.0
+        */
+        virtual void VisualizationPreempted( ) = 0;
+
+     	/**
+        * Invoked when the visualization is resumed.
+        * @since 3.0
+        */
+        virtual void VisualizationResumed( ) = 0;
+
+     	/**
+        * Invoked when the visualization is started.
+        * @since 3.0
+        */
+        virtual void VisualizationStarted( ) = 0;
+
+     	/**
+        * Invoked when the visualization is stopped.
+        * @since 3.0
+        */
+        virtual void VisualizationStopped( ) = 0;
+
+     	/**
+        * Invoked when the visualization the waveform data length changed.
+        * @since 3.0
+        * @param aVisualization The visualization object that changed
+        * @param aData The visualization data.
+        */
+        virtual void WaveformDataLengthChanged( const CVisualization* aVisualization ) = 0;
+
+    };
+
+#endif      // MVISUALIZATIONOBSERVER_H
+
+// End of File