audiostubs/devsoundextensions_stubs/audiovisualizationstub/src/VisualizationBody.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Audio Stubs -  This is the definition of the audio visualization body class.
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*
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*
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*/
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#ifndef CVISUALIZATIONBODY_H
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#define CVISUALIZATIONBODY_H
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// INCLUDES
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#include <Visualization.h>
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// FORWARD DECLARATION
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class MVisualizationObserver;
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// CLASS DECLARATION
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/**
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*  This is the base class for audio visualization.
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*
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*  @lib Visualization.lib
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*  @since 3.0
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*/
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class CVisualization::CBody: public CBase
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	{
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	public: // Constructors and destructor
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	    /**
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        * Factory function for creating the volume object.
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        * @since 3.0
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        * @param aObserver A visualization observer.
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        * @return pointer to CVisualization object
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        */
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		static CBody* NewL( MVisualizationObserver& aObserver);
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		/**
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        *	Destructor
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        */
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		virtual ~CBody();
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    public: // New functions
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		/**
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        * Get the data rate.
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        * @since 3.0
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        * @return data rate in Hz.
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        */
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		TUint32 DataRate() const;
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		/**
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        * Get the upper and lower limits of the supported data rate range
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        * @since 3.0
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        * @param aMin The lower limit of the data rate range
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        * @param aMax The upper limit of the data rate range
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        */
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		void DataRateRange( TUint32& aMin, TUint32& aMax );
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		/**
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        * Used by application enable or disable frequency data.
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        * @since 3.0
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        * @param aIndicator Set to ETrue to enable frequency, EFalse to disable frequency data.
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        */
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		 void EnableFrequencyData( TBool aIndicator );
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		/**
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        * Used by application to enable or disable waveform data.
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        * @since 3.0
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        * @param aIndicator Set to ETrue to enable waveform data, EFalse to disable waveform data.
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        */
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		 void EnableWaveformData( TBool aIndicator );
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		/**
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        * Get frequency band count.
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        * @since 3.0
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        * @return frequency band count.
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        */
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		 TUint32 FreqencyBandCount( ) const;
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		/**
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        * Get frequency band count range.
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        * @since 3.0
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        * @param aMin Lower limit of the frequency band count range
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        * @param aMax Upper limit of the frequency band count range
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        */
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		 void FrequencyBandCountRange( TUint32& aMin, TUint32& aMax );
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		/**
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        * Determine whether frequency data is enabled.
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        * @since 3.0
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        * @return ETrue, if frequency data is enabled. EFalse, if frequency data is disabled.
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        */
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		 TBool IsFrequencyDataEnabled( ) const;
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		/**
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        * Determine whether waveform data is enabled.
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        * @since 3.0
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        * @return ETrue, if waveform data is enabled. EFalse, if waveform data is disabled.
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        */
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		 TBool IsWaveformDataEnabled( ) const;
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		/**
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        * Get the sampling rate.
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        * @since 3.0
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        * @return The sampling rate.
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        */
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		 TUint32 SamplingRate() const;
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		/**
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        * Set the data rate.
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        * @since 3.0
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        * @param aDataRate The data rate.
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        */
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		 void SetDataRateL( TUint32 aDataRate );
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		/**
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        * Sets the frequency band count. Results in a call to
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        * MVisualizationObserver::FrequencyBandCountChanged().
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        * @since 3.0
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        * @param aFrequencyBandCount The frequency band count.
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        */
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		 void SetFrequencyBandCountL( TUint32 aFrequencyBandCount );
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		/**
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        * Sets the waveform band count. Results in a call to
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        * MVisualizationObserver::WaveformDataLengthChanged().
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        * @since 3.0
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        * @param aWaveformDataLength The waveform data length in samples.
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        */
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		 void SetWaveformDataLengthL( TUint32 aWaveformDataLength );
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		/**
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        * Starts visualization. Results in a call to MVisualizationObserver::VisualizationStarted()
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        * @since 3.0
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        */
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		 void StartL( );
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		/**
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        * Stops visualization. Results in a call to MVisualizationObserver::VisualizationStopped()
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        * @since 3.0
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        */
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		 void StopL( );
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		/**
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        * Get the waveform data length.
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        * @since 3.0
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        * @return The waveform data length in samples.
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        */
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		 TUint32 WaveformDataLength() const;
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		/**
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        * Get the waveform data length range in samples.
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        * @since 3.0
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        * @param aMin The lower limit of the waveform data length range
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        * @param aMax The upper limit of the waveform data length range
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        */
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		 void WaveformDataLengthRange( TUint32& aMin, TUint32& aMax );
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	private:
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		/**
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		* Private C++ constructor for this class.
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        * @since 3.0
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        */
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		CBody();
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        /**
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		* Second Phase Costructor
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		* @since 3.0
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		* @param aObserver Visualization Observer
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		*/
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        void ConstructL(MVisualizationObserver& aObserver );
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	private: // Data
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		// Indicate whether frequency data is enabled or not
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		TBool iFrequencyDataEnabled;
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		// Indicate whether waveform data is enabled or not
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		TBool iWaveFormDataEnabled;
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		// Data rate
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		TUint32 iDataRate;
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		TUint32 iDataRateMin;
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		TUint32 iDataRateMax;
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		// Frequency Data
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		TUint32 iFreqencyBandCount;
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		TUint32 iFreqencyBandCountMin;
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		TUint32 iFreqencyBandCountMax;
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		// Sampling rate
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		TUint32 iSamplingRate;
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		// Waveform Data
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		TUint32 iWaveformDataLength;
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		TUint32 iWaveformDataLengthMin;
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		TUint32 iWaveformDataLengthMax;
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		RArray<TInt16> iFrequencyData;
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		RArray<TInt16> iWaveFormData;
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		// Pointer to Observer
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		MVisualizationObserver* iObserver;
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	};
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#endif	// of CVISUALIZATIONCBODY_H
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// End of File