/*

* Copyright (c) 2005 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:  Declaration for CBTSACStreamerController class. This class constructs and

*				 communicates with 'BT Audio Streamer' component to do RTP streaming.

*

*/

#ifndef BTSAC_STREAMER_H

#define BTSAC_STREAMER_H

//  INCLUDES

#include <btaudiostreamer.h>  

#include <btaudiostreaminputbase.h> 

#include <bluetoothav.h>		// Protocol definitions, e.g., TSBCCodecCapabilities

#include "btsacActivePacketDropIoctl.h" 

#include <SbcEncoderIntfc.h>  // uuid of SBC Encoder

class MBTAudioAdaptationObserver

    {

    public:

    virtual void NotifyError(TInt aError) = 0; 

    };

// CONSTANTS

// DATA TYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  

*  

*  

*/

class TBitpoolData

	{

public:

	TInt iMaxBitpoolValue;

	TInt iMaxDeviation;

	TInt iIndex;

	TInt iDownBitpoolIndex;

	TInt iUpBitpoolIndex;

	TBool iMinimumMaxBitpool;

	};

NONSHARABLE_CLASS(CBTSACStreamerController) : public CActive, MBTAudioErrorObserver, MActivePacketDropIoctlObserver

    {

 public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * 

        * 

        * 

        */

        static CBTSACStreamerController* NewL(MBTAudioAdaptationObserver& aObserver);

        /**

        * Destructor.

        * 

        * 

        */

        virtual ~CBTSACStreamerController();

  public:

		// From MBTAudioErrorObserver

		virtual TInt Error(const TInt aError); 

		// From MActivePacketDropIoctlObserver

    	virtual void PacketsDropped(TInt aPacketCount);

  public: // New functions

        /**

        * 

        * 

        * @param aStatus            

        * @return                   None.

        */

        TInt StartStream(RSocket& aSocket, TInt aFrameLength);

        /**

        * 

        * 

        * @param aStatus            

        * @return                   None.

        */

        TInt StopStream();

        /**

        * 

        * 

        * @param aStatus            

        * @return                   None.

        */

        void ResetAudioInput();

        /**

        * 

        * 

        * @param aStatus            

        * @return                   None.

        */

        TInt FillCapabilities( TSBCCodecCapabilities& aSbc );

        /**

        * 

        * 

        * @param aStatus            

        * @return                   None.

        */

        TInt ConfigureSEP( TSBCCodecCapabilities& aDec );

        /**

        * 

        * 

        * @param aStatus            

        * @return                   None.

        */

        TInt FrameLength() const;

        /**

        * 

        * 

        * @param none

        * @return                   TSBCCodecCapabilities.

        */

        TSBCCodecCapabilities &GetCaps();

    protected:  // Functions from CActive

        /**

        * RunL is called by framework after request is being completed.

        * @param nones

        * @return none 

        */    

    	void RunL();

        /**

        * DoCancel() has to be implemented by all the classes deriving CActive.

        * Request cancellation routine.

        * @param none

        * @return none 

        */

    	void DoCancel();

    	/**

    	* RunError is called if RunL() leaves

    	*/

        TInt RunError(TInt aError);

	private: // Data definitions

        enum TBTSACStreamingState

        	{

        		EStateStreaming,

        		EStateIdle,

        		EStateError

        	};

 		typedef enum EOngoingAction

			{

			ENone,

			EErrorSending,

			EDowngradeBitrate,

			EUpgradeBitrate,

			EStartStabilizingTimer,

			EStabilize

			};

     private:

        /**

        * C++ default constructor.

        */

        CBTSACStreamerController(MBTAudioAdaptationObserver& aObserver);

        /**

        * Symbian 2nd phase constructor.

        * 

        * 

        * 

        * 

        */

        void ConstructL();

		void CheckAndAdjustBitpool(TSBCCodecCapabilities& aDec);

		TInt GetMatchingCaps(TSBCCodecCapabilities& aCaps);

		TInt ConfigureSEPBitpool(EOngoingAction aAction);

		void DoSelfComplete(EOngoingAction aAction, TInt aError);

		void SetBlockLen(TSBCCodecCapabilities& aCap, TUint8 aBlockLen);

		TInt GetBlockLen(TSBCCodecCapabilities& aCap) const;

		void SetSamplingFrequency(TSBCCodecCapabilities& aCap, TUint8 aFrequency);

		TInt GetSamplingFrequency(TSBCCodecCapabilities& aCap) const;

		TInt FrameLengthFormula(TSBCCodecCapabilities& aCap) const;

		TInt GetNumOfChannels(TSBCCodecCapabilities& aCap) const;

		void SetNumOfSubbands(TSBCCodecCapabilities& aCap, TUint8 aNumOfSubbands);

		TInt GetNumOfSubbands(TSBCCodecCapabilities& aCap) const;		

		void SetBitpoolValues(TSBCCodecCapabilities& aCap);

		void SetAllocationMethod(TSBCCodecCapabilities& aCap, TUint8 aAllocationMethod);

		void SetChannelMode(TSBCCodecCapabilities& aCap, TUint8 aChannelMode);

		TInt SetCurrentBitpoolData(TInt aBitpool);

		void InitializeBitpoolDataL();

		void ReorganizeBitpoolTable(TInt aNegotiatedMaxBitpool);

		TBitpoolData* GetBitpoolData(TInt aIndex);

		TInt GetIndex(TInt aBitpool);

		TBool IndexValid(TInt aIndex);

	private:    // Data

		CBTAudioStreamer* iBTStreamer;  // Bluetooth Audio Streamer component

		CBTAudioStreamInputBase* iAudioInput;

    	TBTSACStreamingState iState;

    	EOngoingAction iOngoingAction;

    	TSBCCodecCapabilities iLocalCap; // local copy of Audio Adapatation capabilities

    	TSBCCodecCapabilities iMatchCap; // local copy of capabilites used to configure accessory

    	RLibrary iLib;  // for loading BTAudioStreamer and BTAudioAdaptation dll

    	TInt iCurrentBitrate; 

    	TInt iCurrentFrameLength;

		RTimer iTimer;

		CActivePacketDropIoctl* iPacketDropIoctl; 

		RThread iThread;

		CSbcEncoderIntfc *iEncoderCI;

		MBTAudioAdaptationObserver& iObserver;

		TInt iTotalNbrOfDroppedPackets;

		TTime iFirstPacketDropTime; 

		TInt iPacketDropDeviation;

		RArray<TBitpoolData> iBitpoolData;

		TBitpoolData* iCurrentBitpoolData;

    };

#endif      // BTSAC_STREAMER_H

// End of File