/*

* 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:  Project file for EnhancedMediaClient Utility

*

*/

#include "EqualizerEffectImpl.h"

#include <AudioEqualizerBase.h>

#include <ControlObserver.h>

using namespace multimedia;

CEqualizerEffect::CEqualizerEffect()

    {

    // No Impl

    }

CEqualizerEffect::~CEqualizerEffect()

    {

	delete iPrevEqualizerProxy;

	delete  iEqualizerProxy;

	iObservers.Close();

    }

TInt CEqualizerEffect::PostConstructor()

    {

    TRAPD( status, CEffectControlBase::ConstructL(KUidAudioEqualizerEffect) );

    return status;

    }

// From MControl begins

TInt CEqualizerEffect::AddObserver( MControlObserver& aObserver )

    {

    return iObservers.Append(&aObserver);

    }

TInt CEqualizerEffect::RemoveObserver( MControlObserver& aObserver )

    {

	TInt index = iObservers.Find(&aObserver);

	if( index != KErrNotFound )

		{

		iObservers.Remove(index);

		}

	return index;

    }

TUid CEqualizerEffect::Type()

    {

    return KEqualizerEffectControl;

    }

TControlType CEqualizerEffect::ControlType()

    {

	return EEffectControl;

    }

// From MControl ends

// From MEffectControl begins

TInt CEqualizerEffect::Apply()

    {

    return DoApply();

    }

// From MEffectControl ends

TInt CEqualizerEffect::DoApply()

    {

    TInt error(KErrNone);    

	if(iEqualizerProxy)

		{

		TRAP(error,iEqualizerProxy->ApplyL());	

		}	

	else

		{

		error = KErrNotReady;	

		}			

    return error;    

    }

// From MEqualizerEffect begins

/**

* Get the band level in mB for the specified band

* @since 5.0

* @param aBand Frequency Band

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

*/

TInt CEqualizerEffect::BandLevel( TInt& aBand, TInt& aBandLevel )

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		// status here returns the Band Level	

		//TUint8 band(aBand);

		//TInt32 bandlevel;

		aBandLevel = iEqualizerProxy->BandLevel(aBand);	

		//aBandLevel = bandlevel;

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

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

* @since 5.0

* @param aBand Frequency Band

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

*/

TInt CEqualizerEffect::BandWidth( TInt& aBand, TInt& aBandWidth )

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		TRAP(aBandWidth,iEqualizerProxy->BandWidth(aBand));	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

* Get the center frequency in Hz for a given band

* @since 5.0

* @param aBand Frequency Band

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

*/

TInt CEqualizerEffect::CenterFrequency( TInt& aBand, TInt& aCenterFrequency ) 

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aCenterFrequency = iEqualizerProxy->CenterFrequency(aBand);	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

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

* @since 5.0

* @param aBand Frequency Band

* @return Crossover frequency.

*/

TInt CEqualizerEffect::CrossoverFrequency( TInt& aBand, TInt& aCrossoverFreq ) 

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aCrossoverFreq = iEqualizerProxy->CenterFrequency(aBand);	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

* Get the dB range in mB for the equalizer

* @since 5.0

* @param aMin Minimum level in dB

* @param aMin Maximum level in dB

*/

TInt CEqualizerEffect::DbLevelLimits( TInt& aMin, TInt& aMax )

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		TInt32 min,max;	

		TRAP(status,iEqualizerProxy->DbLevelLimits(min,max));	

		aMin = min;

		aMax = max;

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

* Get number of equalizer bands.

* @since 5.0

* @param -

* @return The number of equalizer bands.

*/

TInt CEqualizerEffect::NumberOfBands(TInt& aNumberofBands) 

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aNumberofBands= iEqualizerProxy->NumberOfBands();	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

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

* @since 5.0

* @param aBand Frequency Band

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

* @return -

*/

TInt CEqualizerEffect::SetBandLevel( TInt& aBand, TInt& aLevel )

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		TRAP(status,iEqualizerProxy->SetBandLevelL(aBand,aLevel));	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

// From MAudioEffectControl

/**

* Disable the effect

* @since 5.0

*/

TInt CEqualizerEffect::Disable()

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		TRAP(status,iEqualizerProxy->DisableL());	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;				

	}

/**

* Enable the effect

* @since 5.0

*/

TInt CEqualizerEffect::Enable()

	{

	TInt status(KErrNone);

	RDebug::Print(_L("CEqualizerEffect::Enable() [%x]"),iEqualizerProxy);

	if(iEqualizerProxy)

		{

		TRAP(status,iEqualizerProxy->EnableL());	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;					

	}

/**

* Enforce the effect.

* @since 5.0

* @param aEnforced Indicate the effect is to be enforced or not. ETrue = Enforced.

*/

TInt CEqualizerEffect::Enforce( TBool &aEnforced )

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		TRAP(status,iEqualizerProxy->EnforceL(aEnforced));	

		}	

	else

		{

		status = KErrNotReady;	

		}					

	return status;		

	}

/**

* Check if this effect object currently has update rights.

* A client can lose update rights in some hardware platforms where there are a limited

* number of instances of an effect that can exist at the same time. When an effect instance

* has lost update rights the user can still change settings, but any calls to Apply the

* settings will be deferred until update rights are regained.

* @since 5.0

* @return ETrue if this object currently has rights to update the settings of this effect,

*         EFalse otherwise.

*/

TInt CEqualizerEffect::HaveUpdateRights(TBool &aHaveUpdateRights)

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aHaveUpdateRights = iEqualizerProxy->HaveUpdateRights();	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;	

	}

/**

* Check if the effect is enabled

* @since 5.0

* @return ETrue if the effect is enabled, EFalse if the effect is disabled.

*/

TInt CEqualizerEffect::IsEnabled(TBool &aEnabled)

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aEnabled = iEqualizerProxy->IsEnabled();	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;			

	}

/**

* Check if the effect is enforced.

* @since 5.0

* @return ETrue if the effect is enforced, EFalse if the effect isn ot enforced.

*/

TInt CEqualizerEffect::IsEnforced(TBool &aEnforced)

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aEnforced = iEqualizerProxy->IsEnforced();	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;			

	}

/*

* Get the unique identifier of the audio effect

* @since 5.0

* @return Unique identifier of the audio effect object.

*/

TInt CEqualizerEffect::Uid(TUid &aUid)

	{

	TInt status(KErrNone);

	if(iEqualizerProxy)

		{

		aUid = iEqualizerProxy->Uid();	

		}	

	else

		{

		status = KErrNotReady;	

		}			

	return status;			

	}

// From MAudioEffectControl Ends

// From CEffectControlBase begins

void CEqualizerEffect::Event( TEffectControlEvent aEvent )

    {

	TInt status(KErrNone);    	

    // Controller Loaded with ECIBuilderCreated

    if ( aEvent == ECIBuilderCreated )

        {

    	RDebug::Print(_L("Deleting Proxy"));	

		status = DeleteEffectProxy();

		RDebug::Print(_L("Deleting Proxy [%d]"),status);	

		status = CreateEffectProxy();	

		RDebug::Print(_L("Creating Proxy [%d]"),status);	

		if(status == KErrNone)

			{

			SavePreviousSettings();	

			}

		else

			{

			for ( TInt i = 0; i < iObservers.Count(); i++ )

				{

				iObservers[i]->Event(this,MAudioEffectControl::KDisabled,NULL);

				} 		

			}	

        }

    else if ( aEvent == EMessageHandlerDeleted )

        {

        if(status == KErrNone)

        	{

        	DeleteEffectProxy();	

        	}

        }

    }

// From CEffectControlBase ends

TInt CEqualizerEffect::CreateEffectProxy()

	{

	TInt status(KErrNone);

	status = GetMessageHandle(iMsgHndlrHandlePckg);

	if(status != KErrNone)

		{

		return status;	

		}

	iCustomCommand = GetCustomCommand();		

	if(!iCustomCommand)

		{

		return KErrNotReady;	

		}

	TRAP(status,iEqualizerProxy = CAudioEqualizerProxy::NewL(iMsgHndlrHandlePckg, *iCustomCommand, NULL));	

	if(status == KErrNone)

		{

		TRAP(status,iEqualizerProxy->RegisterObserverL(*this));	

		}		

	return status;

	}

TInt CEqualizerEffect::DeleteEffectProxy()

	{

	TInt status(KErrNone);	

	if(iEqualizerProxy)

		{

		iPrevEqualizerProxy = iEqualizerProxy;	

		}

	iEqualizerProxy = NULL;	

	return status;

	}

TInt CEqualizerEffect::SavePreviousSettings()

	{

	TInt status(KErrNone);	

	if(iPrevEqualizerProxy)

		{

		TInt bands = iPrevEqualizerProxy->NumberOfBands();

		for(TInt i = 1; i <= bands; i++)

			{	

			TRAP(status , iEqualizerProxy->SetBandLevelL(i,iPrevEqualizerProxy->BandLevel(i)));	

			}

		TBool enforce = iPrevEqualizerProxy->IsEnforced();

		iEqualizerProxy->EnforceL(enforce);	

		TBool enable = iPrevEqualizerProxy->IsEnabled();

		if(enable)

			{

			iEqualizerProxy->EnableL();	

			}

		delete iPrevEqualizerProxy;

		iPrevEqualizerProxy = NULL;

		}				

	return status;	

	}

 void CEqualizerEffect::EffectChanged( const CAudioEffect* /*aObservedEffect*/, TUint8 aEvent )

 	{

	for ( TInt i = 0; i < iObservers.Count(); i++ )

		{

		iObservers[i]->Event(this,aEvent,NULL);

		} 		

 	}

// End of file