/*

* 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: 

*

*/

#ifndef MUSHENGCLIPSESSION_H

#define MUSHENGCLIPSESSION_H

// USER

#include "musengmceoutsession.h"

#include "musunittesting.h"

class MMusEngClipSessionObserver;

class CMusEngLiveSession;

class CMceFileSource;

class CMceAudioStream;

class CMceVideoStream;

class CMceAudioCodec;

class CMusEngClipSession : public CMusEngMceOutSession

    {

    MUS_UNITTEST( UT_CMusEngClipSession )

    public:

        /**

        *

        */

        IMPORT_C static CMusEngClipSession* NewL( 

                                const TRect& aRect,

                                MMusEngSessionObserver& aSessionObserver,

                                MMusEngOutSessionObserver& aOutSessionObserver,

                                MMusEngClipSessionObserver& aClipSessionObserver,

                                TUint aSipProfileId = 0 );

        /**

        *

        */

        ~CMusEngClipSession();

    public: // new API

        /**

        * Sets file to be shared during session.

        * @pre File cannot be DRM protected

        * @post InviteL can be called

        * @leave One of the system wide error codes

        * @param aFileName Name of the file to be shared

        */

        IMPORT_C void SetClipL( const TDesC& aFileName );

        /**

        * Starts or stops fast forwarding the clip. Clip is left paused after

        * stopping the fast forwarding.

        * @pre Session is ongoing

        * @param aUseFFWD ETrue to start FFWD, EFalse to stop it.

        */

        IMPORT_C void FastForwardL( TBool aUseFFWD );

        /**

        * Starts or stops fast rewinding the clip. Clip is left paused after

        * stopping the fast rewinding.

        * @pre Session is ongoing

        * @param aUseFRWD ETrue to start FRWD, EFalse to stop it.

        */

        IMPORT_C void FastRewindL( TBool aUseFRWD );

        /**

        * Returns current position as time interval.

        */

        IMPORT_C TTimeIntervalSeconds PositionL();

        /**

        * Returns duration of current clip as time interval

        */

        IMPORT_C TTimeIntervalSeconds DurationL();

        /**

        *

        */

        IMPORT_C void SetPositionL (const TTimeIntervalSeconds &aPosition);

        /**

        * Starts transcoding of file. After the transcoding is complete,

        * file to be shared is changed into the transcoded file.

        * @pre MMusEngClipSessionObserver::TranscodingNeeded is called

        * @param aFileName Name of the transcoding output file.

        */

        IMPORT_C void TranscodeL( const TFileName& aFileName );

        /**

        * Cancels transcoding of file. 

        * @pre TranscodeL has been called succesfully and transcoding 

        *      is not completed

        */

        IMPORT_C void CancelTranscodeL();

    public: // implementation of virtual API from CMusEngMceOutSession

        /**

        * Resumes previously paused session. 

        * Continues showing file on display, resumes clip's audio, continues

        * playing file and enables streaming to network.

        * @leave KErrNotReady if called during FFWD or FRWD

        */

        IMPORT_C void PlayL();

        /**

        * Pauses session.

        * Holds display, mutes clip's audio, pauses file and 

        * disables all streaming to network.

        * @leave KErrNotReady if called during FFWD or FRWD

        */

        IMPORT_C void PauseL();

        /**

        * Tells whether session is paused or not

        */

        IMPORT_C TBool IsPlayingL();

    protected: // implementation of virtual helper from CMusEngMceOutSession

        /**

        * @param aLocalBundle All local streams are supposed to be added to

        *        this bundle

        */

        void CompleteSessionStructureL( CMceStreamBundle& aLocalBundle );        

    protected: // overrides function from CMusEngMceOutSession

        /**

        * Checks that there is no need for transcoding before calling

        * overridden base class variant of this function.

        */

        void EstablishSessionL();

    private: // from MMceStreamObserver, 

             // overrides the function in CMusEngMceSession

        /**

        * The state of the stream has changed.

        *

        * @param aStream, the stream that has changed.

        */

        void StreamStateChanged( CMceMediaStream& aStream );

        /**

        * The state of the source has changed.

        * @param aStream, the stream that uses the source.

        * @param aSource, the source that has changed.

        */

        void StreamStateChanged( CMceMediaStream& aStream,

                                 CMceMediaSource& aSource );

    private:

        /**

        *

        */

        CMusEngClipSession( MMusEngSessionObserver& aSessionObserver,

                            MMusEngOutSessionObserver& aOutSessionObserver,

                            MMusEngClipSessionObserver& aClipSessionObserver,

                            const TRect& aRect );

        /**

        * @leave KErrPermissionDenied if file is DRM protected

        */

        void ConstructL( TUint aSipProfileId );

    private: // HELPERS

        /**

        *

        */

        TBool IsProtectedFileL( const TDesC& aClipFile );

        void AddAmrCodecL( CMceAudioStream& aAudioStream );

        void AddVideoCodecL( CMceVideoStream& aVideoStream, TBool aIgnoreNegotiated = EFalse );

        TBool HasClipEnded();

        TBool IsRewindFromEnd();

        /**

        * Returns current position as microseconds.

        */

        TTimeIntervalMicroSeconds PositionMicroSecondsL();

        /**

        * Constructs audio stream structure during session completion and adds

        * it to session.

        * @param aLocalBundle All local streams are supposed to be added to

        *        this bundle

        * @pre iSession != NULL

        */

        void ConstructAudioStructureL( CMceStreamBundle& aLocalBundle );

        void DetermineBufferingPeriod( CMceMediaStream& aStream );

        TBool IsH264Supported() const;

        void HandleTranscodingFailureL( TInt aError );

        TInt DoCompleteTranscoding();

        void DeleteTranscodingDestinationFileL();

    private: // Data

        /**

        * Reference to live session observer interface.

        */

        MMusEngClipSessionObserver& iClipSessionObserver;

        TFileName iFileName;

        TBool iTranscodingOngoing;

        TTime iFFWDStartTime;

        TTime iFRWDStartTime;

        TTime iBufferingStartedTime;

        TTimeIntervalMicroSeconds iBufferingPeriod;

        TTimeIntervalMicroSeconds iDelayFileEndingPos; 

        TTimeIntervalMicroSeconds iPreviousPos;

        TBool iClipEnded;

        TFileName iTranscodingDestFileName;

        TBool iRewindedToBeginning;

        TBool iTranscodingRequiredDueMissingOptions;

    };

#endif