author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:45:05 +0200 | |
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/* |
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* Copyright (c) 2006 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: Helper class for managing equalizer utility instances. |
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* |
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*/ |
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#ifndef C_MPXEQUALIZERHELPER_H |
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#define C_MPXEQUALIZERHELPER_H |
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// INCLUDES |
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#include <EqualizerPresetsDialog.h> |
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#include <mdaaudiosampleplayer.h> |
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#include <mpxplaybackobserver.h> |
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#include "mpxequalizerview.h" |
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// FORWARD DECLARATIONS |
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class MMPXPlaybackUtility; |
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class CAudioEqualizerUtility; |
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class CEqualizerPresetsDialog; |
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// CLASS DECLARATION |
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/** |
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* Helper class for managing equalizer utility instances. |
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* |
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* @lib mpxplaybackview.lib |
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* @since S60 v3.0 |
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*/ |
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NONSHARABLE_CLASS( CMPXEqualizerHelper ) : public CMPXEqualizerView, |
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public MMPXPlaybackObserver, |
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public MEqualizerPresetActivationObserver, |
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public MMdaAudioPlayerCallback |
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{ |
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public: |
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/** |
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* Two-phased constructor. |
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* |
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* @since 3.0 |
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* @return Pointer to newly created object. |
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*/ |
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static CMPXEqualizerHelper* NewL(); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CMPXEqualizerHelper(); |
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private: |
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/** |
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* C++ default constructor. |
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*/ |
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CMPXEqualizerHelper(); |
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/** |
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* By default Symbian 2nd phase constructor is private. |
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*/ |
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void ConstructL(); |
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/** |
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* Initialize audio equalizer utility for current active playing track. |
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*/ |
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void InitializeEqualizerUtilityL(); |
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/** |
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* Release audio equalizer utility. |
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*/ |
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void ReleaseEqualizerUtility(); |
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/** |
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* Get current preset ID. |
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* |
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* @param aPresetId On return, Current preset ID. |
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* @return Index to the preset array if found. |
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* KErrNotFound if not found. |
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*/ |
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TInt GetPresetId( TInt& aPresetId ); |
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/** |
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* Initialize secondary audio equalizer utility |
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* for situations when the engine cannot provide one. |
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*/ |
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void InitializeBackupEqualizerUtilityL(); |
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/** |
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* Create secondary audio equalizer utility |
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* based on latest preset settings. |
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*/ |
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void CreateBackupEqualizerUtility(); |
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/** |
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* Setup active equalizer utility for equalizer dialog. |
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*/ |
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void SetupActiveEqualizerUtility(); |
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/** |
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* Launch equalizer dialog. |
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*/ |
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void DoLaunchEqualizerDialogL(); |
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/** |
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* Handle playback message |
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* |
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* @param aMessage playback message |
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*/ |
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void DoHandlePlaybackMessageL( |
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const CMPXMessage& aMessage ); |
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/** |
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* Handle playback state changed. |
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* |
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* @param aState New Playback state |
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*/ |
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void DoHandleStateChangedL( |
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TMPXPlaybackState aState ); |
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134 |
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// from base class CMPXEqualizerView |
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/** |
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* From CMPXEqualizerView |
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* Launch equalizer dialog. |
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* |
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* @since 3.0 |
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*/ |
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void LaunchEqualizerL(); |
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144 |
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// from base class MMPXPlaybackObserver |
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|
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/** |
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* From MMPXPlaybackObserver |
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* Handle playback message |
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* |
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* @param aMessage playback message |
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* @param aErr system error code. |
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*/ |
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void HandlePlaybackMessage( CMPXMessage* aMessage, TInt aError ); |
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155 |
|
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// from base class MEqualizerPresetActivationObserver |
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157 |
|
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158 |
/** |
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* From MEqualizerPresetActivationObserver |
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* Handle preset id activation from Equalizer dialog. |
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* |
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* @param aActivatedPreset Current activated preset id. |
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*/ |
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void HandlePresetActivation( TInt aActivatedPreset ); |
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|
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// from base class MMdaAudioPlayerCallback |
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167 |
|
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/** |
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* From MMdaAudioPlayerCallback. |
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* Callback when an attempt to open and initialise an audio sample |
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* has completed. |
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* |
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* @param aError The status of the audio sample after initialisation. |
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* @param aDuration The duration of the audio sample. |
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*/ |
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void MapcInitComplete( |
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TInt aError, |
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const TTimeIntervalMicroSeconds& aDuration ); |
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|
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/** |
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* From MMdaAudioPlayerCallback. |
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* Callback when an attempt to playback an audio sample has completed. |
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* |
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* @param aError The status of playback. |
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*/ |
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void MapcPlayComplete( TInt aError ); |
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|
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private: // Data |
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189 |
|
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// Pointer to the equalizer utility we use. |
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// This is either the equalizer utility provided by Music |
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// Player Engine or iBackupEqualizerUtility. |
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CAudioEqualizerUtility* iEqualizerUtility; // not owned |
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194 |
|
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// Play utility used to open the 'null sound' file and |
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// create iBackupEqualizerUtility |
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CMdaAudioPlayerUtility* iPlayUtility; // owned |
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198 |
|
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// Equalizer utility for the active playback utility |
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CAudioEqualizerUtility* iAudioEqualizerUtility; // owned |
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201 |
|
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// Backup equalizer utility instance used when the equalizer custom |
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// interface cannot be created by using the active play utility |
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CAudioEqualizerUtility* iBackupEqualizerUtility; // owned |
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205 |
|
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// Current playback utility |
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MMPXPlaybackUtility* iPlaybackUtility; // not own, but need to close |
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208 |
|
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CEqualizerPresetsDialog* iEqDialog; // not own |
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210 |
|
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// Should be launch equalizer dialog on open complete callback |
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TBool iLaunchEqualizerOnOpenComplete; |
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213 |
|
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// iPlayUtility->OpenL() has been called but not yet completed |
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TBool iOpenInProgress; |
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// Used to syncronize backup equalizer creation and dialog launching |
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CActiveSchedulerWait* iWait; |
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}; |
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#endif // C_MPXEQUALIZERHELPER_H |
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// End of File |