/*

* Copyright (c) 2003 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:  Performance monitor timer

*

*/

#ifndef CCMRPERFMONITOR_H

#define CCMRPERFMONITOR_H

// INCLUDES

#include <e32base.h>

#include <mmf/devvideo/devvideobase.h>

// FORWARD DECLARATIONS

class CCMRActiveOutput;

class CCMRVideoRecorderClient;

class MMMFClockSource;

class CCMRMediaRecorder;

// CLASS DECLARATION

/**

*  Performance monitor class. Continuously checks the performance of the system (e.g. timestamps) 

*  and adjusts video settings based on the current state

*

*  @lib CAMCMEDIARECORDER.LIB

*  @since 2.1

*/

class CCMRPerfMonitor : public CTimer, public MMMFClockSource

    {

    public: // Constants

        enum TErrorCode

            {

            EInternalAssertionFailure = -10060

            };

    public:

        /**

        * Two-phased constructor.

        */

        static CCMRPerfMonitor* NewL(

            CCMRActiveOutput* aAudioOutput, 

            CCMRActiveOutput* aVideoOutput, 

            CCMRVideoRecorderClient* aVideoRecorder,

            CCMRMediaRecorder* aMediaRecorder);

        /**

        * Destructor.

        */

        ~CCMRPerfMonitor();

    public: // New functions

        /**

        * Starts monitoring

        * @since 2.1

        */

        void StartL();

        /**

        * Stops monitoring

        * @since 2.1

        */

        void StopL();

        void PauseL();

    public: // From MMMFClockSource

	    /**

	    Retrieves a custom interface for the clock source.

	    @param  "aInterface"	"Interface UID, defined by the entity specifying the interface."

	    @return "Pointer to the interface implementation, or NULL if the interface is not available. 

    			The pointer must be cast to the appropriate interface class."

    	*/

    	TAny* CustomInterface(TUid aInterface);

	    /**

	    Retrieves the current stream time.

	    @return "The number of microseconds passed in the clock compared to the reference time."

	    */

	    TTimeIntervalMicroSeconds Time();

    protected: // From CTimer/CActive

        /**

        * From CTimer Checks status & possibly adjusts settings

        */

        void RunL();

        /**

        * From CTimer Cancels timer

        */

        void DoCancel();

        /**

        * From CTimer Handles leaves from RunL

        */

        TInt RunError(TInt aError);

    private: // Constructors

        /**

        * C++ default constructor.

        */

        inline CCMRPerfMonitor() : CTimer(EPriorityHigh) {};

        /**

        * By default Symbian OS constructor is private.

        */

        void ConstructL(            

            CCMRActiveOutput* aAudioOutput, 

            CCMRActiveOutput* aVideoOutput, 

            CCMRVideoRecorderClient* aVideoRecorder,

            CCMRMediaRecorder* aMediaRecorder);

    private: // Data

        // active object handling audio output

        CCMRActiveOutput* iAudioOutput;

        // active object handling video output

        CCMRActiveOutput* iVideoOutput;

        // video recorder client handling video settings

        CCMRVideoRecorderClient* iVideoRecorder;

        // Mediarecorder - audio/video settings, audioenabled

        CCMRMediaRecorder* iMediaRecorder;

        // counter for total adjusted time in milliseconds

        TInt iAdjustedTimeMs;

        // latest audio timestamp

        TTimeIntervalMicroSeconds iAudioTime;

        // Pause offset when iClockSource in use.

        TTimeIntervalMicroSeconds iClockSourcePauseOffset;

        // whether performance monitor's timed monitoring function is running or not

        TBool iTimedMonitoringRunning;

        // System clocksource started

        TBool iClockSourceStarted;

        // Performance monitor paused

        TBool iPerfMonPaused;

        TTime iStartTime;

        TTimeIntervalMicroSeconds iTimeStampWhenPaused;

    };

#endif // CCMRPERFMONITOR_H

// End of file