/*

* Copyright (c) 2006-2009 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:

*

*/

#ifndef CDEVAUDIO_H

#define CDEVAUDIO_H

#include <e32base.h>

#include "mmfdevsoundadaptationbody.h"

#include <a3f/maudiocontextobserver.h>

#include <a3f/maudiostreamobserver.h>

#include "mdevsoundadaptationinfoobserver.h"

#include <a3f/a3f_trace_utils.h>

#include <a3f/a3fdevsoundaudiopauseresume.h>

// CLASS FORWARD

class CDevAudioControl;

class CDevPlayControl;

class CDevRecordControl;

class CDevToneControl;

class CDevGenControl;

class CAudioContextFactory;

class CA3FDevSoundAdaptationInfo;

class MAudioContext;

class MAudioStream;

class MGlobalProperties;

enum TDevSoundAdaptorState

	{

	EDevSoundAdaptorCreated_Uninitialised,

	EDevSoundAdaptorRemovingProcessingUnits,

	EDevSoundAdaptorUnitialised_Uninitialised,

	EDevSoundAdaptorUninitialising,

	EDevSoundAdaptorInitialising,

	EDevSoundAdaptorInitialised_Initialised,

	EDevSoundAdaptorLoading,

	EDevSoundAdaptorUnloading,

	EDevSoundAdaptorInitialised_Idle,

	EDevSoundAdaptorGoingActive,

	EDevSoundAdaptorPreempted,

	EDevSoundAdaptorBeingPreempted,

	EDevSoundAdaptorStopping,

	EDevSoundAdaptorActivating,

	EDevSoundAdaptorActive_Active,

	EDevSoundAdaptorPausing,

	EDevSoundAdaptorPaused_Primed

	};

/**

 * CDevAudio.

 *

 * ?description

 *

 * @lib mmfdevsoundadaptation.lib

 * @since

 */

NONSHARABLE_CLASS(CDevAudio) :	public CBase,

								public MAudioContextObserver,

								public MA3FDevSoundAdaptationInfoObserver,

								public MA3FDevSoundAutoPauseResumeObserver

	{

	friend class CDevAudioControl;

	friend class CDevPlayControl;

	friend class CDevRecordControl;

	friend class CDevToneControl;

    friend class CDevGenControl;

    friend class CDevCommonControl;

public:

	~CDevAudio();

	static CDevAudio* NewL(MDevSoundAdaptationObserver& aDevSoundObserver,

									MGlobalProperties& aGlobalProperties);

	void ConstructL(MGlobalProperties& aGlobalProperties);

	// 2nd phase async construct - will callback to aDevSoundObserver

	TInt PostOpen();

	/**

	* Sets control operating mode (playing/recording...)

	* @since

	* @param aMode new control mode

	* @param aFormat codec format

	* @return error code

	*/

	TInt Initialize(TUid aFormat, TMMFState aMode);

	/**

	* Cancels Initialization

	* @since

	* @return error code

	*/

	TInt CancelInitialize();

	/**

	* Returns pointer to audio control instance for current operating mode

	* @since

	* @param aAudioControl on return, contains pointer to audio control

	* @return error code

	*/

	CDevAudioControl* GetAudioControl();

	/**

	* Defines the priority settings that should be used for this instance.

	* @since

	* @param const TMMFPrioritySettings &aPrioritySettings A class type

	*        representing the client's priority, priority preference and

	*        state

	* @return Err

	*/

	TInt SetPrioritySettings(const TMMFPrioritySettings& aPrioritySettings);

	/**

	* Sets client configuration

	* @since

	* @param TMMFClientConfig& aClientConfig A reference to client

	*        configuration object.

	*/

	TInt SetClientConfig(const TMMFClientConfig& aClientConfig);

	/**

	* Retrieve the current A3F state

	* @since

	* @return the current A3F state. See TAudioState

	*/

	TDevSoundAdaptorState ActiveState() const;

	/**

	* SetVolume for DevSound

	*/

	TInt SetDevSoundVolume(TInt aVolume, TBool& aAsyncCompletion);

	/**

	* SetGain for DevSound

	*/

	TInt SetDevSoundGain(TInt aGain, TBool& aAsyncCompletion);

	/**

	* SetPlayBalance for DevSound

	*/

	TInt SetDevSoundPlayBalance(TInt aLeftPercentage, TInt aRightPercentage, TBool& aAsyncCompletion);

	/**

	* SetPlayBalance for DevSound

	*/

	TInt SetDevSoundRecordBalance(TInt aLeftPercentage, TInt aRightPercentage, TBool& aAsyncCompletion);

	/**

	* SetVolumeRamp for DevSound

	*/

	TInt SetVolumeRamp(const TTimeIntervalMicroSeconds& aRampDuration);

	/**

	* MaxVolume for DevSound

	*/

	TInt DevSoundMaxVolume() const;

	/**

	* MaxGain for DevSound

	*/

	TInt DevSoundMaxGain() const;

	/**

	* Volume setting

	*/

	TInt DevSoundVolume() const;

	/**

	* Gain setting

	*/

	TInt DevSoundGain() const;

	/**

	* GetPlayBalance for DevSound

	*/

	void GetDevSoundPlayBalance(TInt& aLeftPercentage, TInt& aRightPercentage);

	/**

	* GetRecordBalance for DevSound

	*/

	void GetDevSoundRecordBalance(TInt& aLeftPercentage, TInt& aRightPercentage);

	/**

	* GetSupportedDataTypes for DevSound

	*/

	void DevSoundSupportedDataTypesL(RArray<TFourCC>& aSupportedDataTypes, TUint aDataType);

	/**

	* Call from control - generates appropriate SetGainAndBalance() call

	*/

	TInt RequestGainAndBalance(CDevAudioControl* aCallingControl);

	// From base class MAudioContextObserver

	/**

	* Callback to context observer to show progression through Commit() and pre-emption cycles

	*

	* @param aEvent  a Uid giving the specific event.

	* @param aError  an error code. KErrNone if successful, otherwise one of the system wide error codes.

	*/

	virtual void ContextEvent(TUid aEvent, TInt aError);

	// from MA3FDevSoundAdaptationInfoObserver

	void RequestMaxGainComplete (TUid aCodecType, TInt aError, TInt aResult);

	void RequestSupportedFormatsComplete(TUid aCodecType, TInt aError);

	/**

	* Queries if the low layers does support resume operation.

	* @since

	* @return TBool ETrue if Resume is supported

	*               EFalse otherwise

	*/

	TBool IsResumeSupported();

	void ConvertToFourCcL(RArray<TFourCC>& aSupportedDataTypes, RArray<TUid>& iSupportedFormats);

	//from MA3FDevSoundAutoPauseResume

	TInt RegisterAsClient(TUid aEventType, const TDesC8& aNotificationRegistrationData);

	TInt CancelRegisterAsClient(TUid aEventType);

	TInt WillResumePlay();

	//from MA3FDevSoundAutoPauseResumeObserver

	virtual void NotifyResume();

	/**

	* GetPrioritySettings for DevSound

	*/

	void GetPrioritySettings(TAudioTypeSettings& astorage);

	TBool IsPrioritySet();

protected:

	CDevAudio(MDevSoundAdaptationObserver& aAdaptationObserver);

	// If active, apply devsound volume and balance changes

	TInt SetGainAndBalance(TBool aCallBack, TBool& aAsyncCompletion);

	// Helper methods

	TInt CreateAudioProcessingUnits(TUid aSource, TUid aSink, TUid aCodec);

	void DeleteAudioProcessingUnits();

/*

* most of member data is protected for DevAudioControl access

*/

protected: // data

	/**

	* adaptation observer - used to indicate async callbacks etc

	*/

	MDevSoundAdaptationObserver& iAdaptationObserver;

	/**

	* Pointer to audio context factory - context creation

	* Own.

	*/

	CAudioContextFactory *iAudioContextFactory;

	/**

	* Pointer to audio context.

	* Not own.

	*/

	MAudioContext *iAudioContext;

	/**

	* Pointer to audio stream.

	* Not own.

	*/

	MAudioStream *iAudioStream;

	/**

	* Pointer to audio source.

	* Not own.

	*/

	MAudioProcessingUnit* iAudioSource;

	/**

	* Pointer to audio codec.

	* Not own.

	*/

	MAudioProcessingUnit* iAudioCodec;

	/**

	* Pointer to audio gain control

	* Not own.

	*/

	MAudioProcessingUnit* iGainControl;

	/**

	* Pointer to audio sink

	* Not own.

	*/

	MAudioProcessingUnit* iAudioSink;

	/**

	* Mode to which this DevAudio is initialized in

	*/

	TMMFState iMode;

	TUid 	iFormat;

	/**

	* Active DevSound Adaptor state

	*/

	TDevSoundAdaptorState iActiveState;

	TAudioState		iActiveStreamState;

	TBool 	iReinitializing;

	TBool 	iClosing;

	TBool	iStop;

	TUid 	iTargetFormat;

	TMMFState iTargetMode;

	TInt iDevSoundMaxGain;

	TInt iDevSoundMaxVolume;

	TInt iDevSoundGain;

	TInt iDevSoundVolume;

	TInt iDevSoundPlayBalance[2];

	TInt iDevSoundRecordBalance[2];

	TTimeIntervalMicroSeconds	iRampDuration;

private:

	enum TPreOpenState

		{

		EPreOpenStateIdle,

		EPreOpenStateRequestingMaxVolume,

		EPreOpenStateRequestingMaxGain,

		EPreOpenStateRequestingInputFormats,

		EPreOpenStateRequestingOutputFormats,

		};

	TPreOpenState iPreOpenState;

	RArray<TUid> iSupportedInputFormats;

	RArray<TUid> iSupportedOutputFormats;

	CA3FDevSoundAdaptationInfo* iAdaptationInfo;

	CDevPlayControl*   iDevPlayControl;

	CDevRecordControl* iDevRecordControl;

	CDevToneControl*   iDevToneControl;

	CDevGenControl*    iDevGenControl;

	/**

	* Points to whichever control is active

	* Not own.

	*/

	CDevAudioControl* iCurrentAudioControl;

	// Pointer to global properties

	// Not owned.

	MGlobalProperties*	iGlobalProperties;

	TAudioTypeSettings iPrioritySettings;

	TBool iPriorityFlag;

	};

inline TInt CDevAudio::DevSoundMaxVolume() const

	{

	return iDevSoundMaxVolume;

	}

inline TInt CDevAudio::DevSoundMaxGain() const

	{

	return iDevSoundMaxGain;

	}

inline TInt CDevAudio::DevSoundVolume() const

	{

	return iDevSoundVolume;

	}

inline TInt CDevAudio::DevSoundGain() const

	{

	return iDevSoundGain;

	}

#endif // CDEVAUDIO_H