/*

* Copyright (c) 2006 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:  This is the definition of the Audio Equalizer effect class.

*

*/

#ifndef CAUDIOEQUALIZER_H

#define CAUDIOEQUALIZER_H

// INCLUDES

#include <e32base.h>

#include <AudioEffectBase.h>

#include <AudioEqualizerData.h>

const TUid KUidAudioEqualizerEffect = {0x1020382A};

// FORWARD DELCARATION

class CMdaAudioConvertUtility;

class CMdaAudioPlayerUtility;

class CMdaAudioRecorderUtility;

class CMdaAudioInputStream;

class CMdaAudioOutputStream;

class CMdaAudioToneUtility;

class CCustomCommandUtility;

class CCustomInterfaceUtility;

class CMMFDevSound;

class CMidiClientUtility;

class CDrmPlayerUtility;

class CVideoPlayerUtility;

// CLASS DECLARATION

/**

*  This is the Equalizer effect class for managing audio equalizer settings.

*

*  @lib AudioEqualizerEffect.lib

*  @since 3.0

*/

class CAudioEqualizer : public CAudioEffect

	{

	public:		//New Functions

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL();

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to a convert utility

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMdaAudioConvertUtility& aUtility );

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to an audio input stream utility

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMdaAudioInputStream& aUtility );

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to an audio output stream utility

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMdaAudioOutputStream& aUtility );

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to an audio player utility

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMdaAudioPlayerUtility& aUtility );

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to an audio record utility

        * @param aRecordStream ETrue if the effect is to be applied to the recording,

        *                      EFalse if the effect is to be applied only to the playback

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMdaAudioRecorderUtility& aUtility, TBool aRecordStream );

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to an audio tone utility

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMdaAudioToneUtility& aUtility );

	    /**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aDevSound A reference to a DevSound instance

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CMMFDevSound& aDevSound );

		/**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aUtility A reference to a custom command utility

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( CCustomCommandUtility* aUtility );

		/**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param aCustomInterface A reference to a custom interface

        * @return pointer to CAudioEqualizer object

        */

		IMPORT_C static CAudioEqualizer* NewL( MCustomInterface& aCustomInterface );

		/**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param CMidiClientUtility A reference to a CMidiClientUtility object

        * @return pointer to CAudioEqualizer object

        */		

		IMPORT_C static CAudioEqualizer* NewL( CMidiClientUtility& aUtility );

		/**

        * Factory function for creating the audio equalizer object.

        * @since 3.0

        * @param CDrmPlayerUtility A reference to a CDrmPlayerUtility object

        * @return pointer to CAudioEqualizer object

        */		

		IMPORT_C static CAudioEqualizer* NewL( CDrmPlayerUtility& aUtility );

		/**

        * Factory function for creating the audio equalizer object.

        * @since 3.2

        * @param CVideoPlayerUtility A reference to a CVideoPlayerUtility object

        * @return pointer to CAudioEqualizer object

        */		

		IMPORT_C static CAudioEqualizer* NewL( CVideoPlayerUtility& aUtility );

		/**

        *

        * Destructor

        */

		IMPORT_C virtual ~CAudioEqualizer();

		/**

        * Get the band level in mB for the specified band

        * @since 3.0

        * @param aBand Frequency Band

        * @return Returns the band level in mB for the specified band

        */

		IMPORT_C TInt32 BandLevel( TUint8 aBand ) const;

		/**

        * Get the band width in Hz for the specified band.

        * @since 3.0

        * @param aBand Frequency Band

        * @return The band width in Hz for the specified band

        */

		IMPORT_C TInt32 BandWidth( TUint8 aBand ) const;

		/**

        * Get the center frequency in Hz for a given band

        * @since 3.0

        * @param aBand Frequency Band

        * @return The center frequency in Hz for a given band.

        */

		IMPORT_C TInt32 CenterFrequency( TUint8 aBand ) const;

		/**

        * Get the cross-over frequency between the given frequency band (aBand) and the next band

        * @since 3.0

        * @param aBand Frequency Band

        * @return Crossover frequency.

        */

		IMPORT_C TInt32 CrossoverFrequency( TUint8 aBand ) const;

		/**

        * Get the dB range in mB for the equalizer

        * @since 3.0

        * @param aMin Minimum level in dB

        * @param aMin Maximum level in dB

        */

		IMPORT_C void DbLevelLimits( TInt32& aMin, TInt32& aMax );

		/**

        * Get number of equalizer bands.

        * @since 3.0

        * @param -

        * @return The number of equalizer bands.

        */

		IMPORT_C TUint8 NumberOfBands() const;

		/**

        * Sets the equalizer band level value in mB, ranging from Min to Max

        * @since 3.0

        * @param aBand Frequency Band

        * @param aLevel band level in dB, ranges from DbLevelLimits()

        * @return -

        */

		IMPORT_C void SetBandLevelL( TInt8 aBand, TInt32 aLevel );

	public: // functions from base class

		/*

		* From CAudioEffect

        * Get the unique identifier of the audio effect

        * @since 3.0

        * @return Unique identifier

        */

		IMPORT_C TUid Uid() const;

    protected:  // Functions from base classes

		/**

		* From CAudioEffect

		* Create a package of the effect data

        * @since 3.0

        * @return A descriptor containing the effect data.

        */

		IMPORT_C const TDesC8& DoEffectData();

		/**

		* From CAudioEffect

		* Internal function to unpack effect data

        * @since 3.0

        * @param aEffectDataBuffer Descriptor containing packed effect data

        * @return -

        */

        IMPORT_C void SetEffectData( const TDesC8& aEffectDataBuffer );

	protected:

		/**

		* Private C++ constructor for this class.

        * @since 3.0

        * @return	-

        */

		IMPORT_C CAudioEqualizer();

		/**

		* Create a descriptor containing data for the specified band(s).

        * @since 3.0

        * @param aBand The frequency band data to package. Valid if aAllBands = EFalse.

        * @param aAllBands Indicate if data for all bands is requested.

        * @return A descriptor containing data for specified band.

        */

		IMPORT_C const TDesC8& DoBandDataL( TUint8 aBand, TBool aAllBands );

		/**

		* Unpack band data from the specified descriptor.

        * @since 3.0

        * @param aNumberOfBands Number of bands contained in the descriptor.

        * @param aBandDataBuffer Descriptor containing band data

        */

        IMPORT_C void SetBandDataL( TInt aNumberOfBands, const TDesC8& aBandDataBuffer );

	protected:

		// Equalizer data structure

		TEfAudioEqualizer iAudioEqualizerData;

		// Equalizer Band data structure

		RArray<TEfAudioEqualizerBand> iBandsData;

		// Data package sent to server

		TEfAudioEqualizerDataPckg iDataPckgTo;

		// Band Data package sent to server

		TEfAudioEqualizerBandDataPckg iBandDataPckgTo;

		// Bitmask used to indicate change in band data

		TUint32 iBandChange;

		HBufC8* iBandDataBuf;

    protected:    // Friend classes

		friend class CAudioEqualizerMessageHandler;

		friend class CAudioEqualizerUtility;

	};

#endif	// of CAUDIOEQUALIZER_H

// End of File