mmfenh/enhancedmediaclient/Client/src/Components/AudioEffects/EqualizerEffectImpl.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mmfenh/enhancedmediaclient/Client/src/Components/AudioEffects/EqualizerEffectImpl.cpp Tue Feb 02 01:08:46 2010 +0200
@@ -0,0 +1,485 @@
+/*
+* 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