/*

* Copyright (c) 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: 

*

*/

// USER

#include "musengclipvideoplayer.h"

#include "musengcamerahandler.h"

#include "musengmceutils.h"

#include "musengdisplayhandler.h"

#include "muslogger.h"

// SYSTEM

#include <mcesession.h>

#include <mcevideostream.h>

#include <mcefilesource.h>

#include <drmcommon.h>

// CONSTANTS

const TInt64 KMicroSecondsInOneSecond = 1000000;

const TInt KFastWindingFactor = 4;

// -----------------------------------------------------------------------------

//

// -----------------------------------------------------------------------------

//

CMusEngClipVideoPlayer* CMusEngClipVideoPlayer::NewL( 

    MMusEngDisplayHandler& aDisplayHandler,

    MLcAudioControl& aLcAudioControl )

    {

    return new( ELeave )CMusEngClipVideoPlayer( 

        aDisplayHandler, aLcAudioControl );

    }

// -----------------------------------------------------------------------------

//

// -----------------------------------------------------------------------------

//

CMusEngClipVideoPlayer::CMusEngClipVideoPlayer( 

    MMusEngDisplayHandler& aDisplayHandler,

    MLcAudioControl& aLcAudioControl ) :

    CMusEngLocalVideoPlayer( aDisplayHandler, aLcAudioControl )

    {

    }

// -----------------------------------------------------------------------------

//

// -----------------------------------------------------------------------------

//

CMusEngClipVideoPlayer::~CMusEngClipVideoPlayer()

    {

    }

// -----------------------------------------------------------------------------

//

// -----------------------------------------------------------------------------

//

TBool CMusEngClipVideoPlayer::HasClipEnded()

    {

    MUS_LOG( "mus: [ENGINE] -> CMusEngClipVideoPlayer::HasClipEnded" )

    TBool hasClipEnded( EFalse );

    if ( iMceSession )

        {    

        CMceVideoStream* videoOut = NULL;

        TRAPD( err, 

               videoOut = MusEngMceUtils::GetVideoOutStreamL( *iMceSession ) );

        if ( err != KErrNone ) 

            {

            MUS_LOG1( "mus: [ENGINE]     Error in GetVideoOutStreamL %d", err )

            return EFalse;

            }

        CMceFileSource* filesource = NULL;

        TRAP( err, filesource = MusEngMceUtils::GetFileSourceL( *iMceSession ) )

        if ( err == KErrNone )

            {

            TTimeIntervalMicroSeconds position;

            TTimeIntervalMicroSeconds duration;

            TRAP( err, position = filesource->PositionL() );

            TRAPD( err2, duration = filesource->DurationL() );

            if ( err != KErrNone || err2 != KErrNone )

                {

                return EFalse;

                }

            MUS_LOG2( "mus: [ENGINE]    position = %Ld, duration = %Ld", 

                      position.Int64(), duration.Int64() )

            hasClipEnded = 

                ( position.Int64() == 0 && 

                  !filesource->IsEnabled() && 

                  videoOut->State() == CMceMediaStream::EDisabled );

            }

        }

    if ( hasClipEnded )

        {

        iDelayFileEndingPos = 0;

        }

    MUS_LOG( "mus: [ENGINE] <- CMusEngClipVideoPlayer::HasClipEnded" )

    return hasClipEnded;

    }

// -----------------------------------------------------------------------------

//

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::SetBufferingPeriod( 

    const TTimeIntervalMicroSeconds& aPeriod )

    {

    iBufferingPeriod = aPeriod;

    }

// -----------------------------------------------------------------------------

// From MLcVideoPlayer

// -----------------------------------------------------------------------------

//

TBool CMusEngClipVideoPlayer::LcIsPlayingL()

    {

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    return ( MusEngMceUtils::GetFileSourceL( *iMceSession )->IsEnabled() );

    }

// -----------------------------------------------------------------------------

// From MLcVideoPlayer

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::LcPlayL()

    {

    MUS_LOG( "mus: [ENGINE]  -> CMusEngClipVideoPlayer::LcPlayL" )

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );    

    if ( !file->IsEnabled() )

        {

        file->EnableL();   

        }

    MUS_LOG( "mus: [ENGINE]  <- CMusEngClipVideoPlayer::LcPlayL" )    

    }

// -----------------------------------------------------------------------------

// From MLcVideoPlayer

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::LcPauseL()

    {

    MUS_LOG( "mus: [ENGINE]  -> CMusEngClipVideoPlayer::LcPauseL" )

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );    

    if ( file->IsEnabled() )

        {

        file->DisableL();

        }

    MUS_LOG( "mus: [ENGINE]  <- CMusEngClipVideoPlayer::LcPauseL" )   

    }

// -----------------------------------------------------------------------------

// From MLcVideoPlayer

// -----------------------------------------------------------------------------

//

MLcSourceFileControl* CMusEngClipVideoPlayer::LcSourceFileControl()

    {

    return this;

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::SetLcFileNameL( const TFileName& aFileName )

    {

    MUS_LOG( "mus: [ENGINE]  -> CMusEngClipVideoPlayer::SetLcFileNameL" )

    __ASSERT_ALWAYS( !IsProtectedFileL( aFileName ),

                     User::Leave( KErrPermissionDenied ) );    

    if ( iMceSession )

        {

        CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );

        file->UpdateL( aFileName );

        }

    iFileName = aFileName;

    MUS_LOG( "mus: [ENGINE]  <- CMusEngClipVideoPlayer::SetLcFileNameL" )    

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// -----------------------------------------------------------------------------

//

TFileName& CMusEngClipVideoPlayer::LcFileName()

    {

    return iFileName;

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// Since MCE does not at the moment support SetFastForwardL function, this

// functionality is implemented by taking a timestamp when forwarding is

// started and calculating a new position when it is ended.

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::LcFastForwardL( TBool aUseFFWD )

    {

    MUS_LOG1( "mus: [ENGINE] -> CMusEngClipVideoPlayer::FastForward( %d )", 

              aUseFFWD )

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );

    if ( aUseFFWD )

        {

        // Ignore if we are already fastforwarding

        if ( iFFWDStartTime.Int64() > 0 )

            {

            return;

            }

        // Stop rewinding if ongoing, else just pause file source

        if ( iFRWDStartTime.Int64() > 0 )

            {

            LcFastRewindL( EFalse );

            }

        else

            {

            file->DisableL();

            }

        // Get timestamp for starttime

        iFFWDStartTime.HomeTime();

        }

    else

        {

        // Leave if we are not fastforwarding

        if ( iFFWDStartTime.Int64() == 0 )

            {

            User::Leave( KErrAlreadyExists );

            }

        // Set new position

        file->SetPositionL( PositionMicroSecondsL( ETrue ) );

        // Reset timer

        iFFWDStartTime = TTime( 0 );

        }

    MUS_LOG( "mus: [ENGINE] <- CMusEngClipVideoPlayer::FastForward" )

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// Since MCE does not at the moment support SetFastRewindL function, this

// functionality is implemented by taking a timestamp when rewinding is

// started and calculating a new position when it is ended.

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::LcFastRewindL( TBool aUseFRWD )

    {

    MUS_LOG1( "mus: [ENGINE] -> CMusEngClipVideoPlayer::FastRewind( %d )", 

              aUseFRWD )

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );

    if ( aUseFRWD )

        {

        // Ignore if we are already fastrewinding

        if ( iFRWDStartTime.Int64() > 0 )

            {

            return;

            }

        // Stop fastforwarding if ongoing, else just pause file source

        if ( iFFWDStartTime.Int64() > 0 )

            {

            LcFastForwardL( EFalse );

            }

        else

            {

            file->DisableL();

            }

        // Get timestamp for starttime

        iFRWDStartTime.HomeTime();

        }

    else

        {

        // Leave if we are not fastrewinding

        if ( iFRWDStartTime.Int64() == 0 )

            {

            User::Leave( KErrAlreadyExists );

            }

        // Set new position

        file->SetPositionL( PositionMicroSecondsL( ETrue ) );

        // Reset timer

        iFRWDStartTime = TTime( 0 );

        }

    MUS_LOG( "mus: [ENGINE] <- CMusEngClipVideoPlayer::FastRewind" )

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// -----------------------------------------------------------------------------

//

TTimeIntervalSeconds CMusEngClipVideoPlayer::LcFileDurationL()

    {

    MUS_LOG( "mus: [ENGINE] -> CMusEngClipVideoPlayer::DurationL" )

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );

    TTimeIntervalMicroSeconds duration = file->DurationL();

    MUS_LOG( "mus: [ENGINE] <- CMusEngClipVideoPlayer::DurationL" )

    return TTimeIntervalSeconds( static_cast< TInt >( 

        duration.Int64() / KMicroSecondsInOneSecond ) );

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// -----------------------------------------------------------------------------

//

TTimeIntervalSeconds CMusEngClipVideoPlayer::LcFilePositionL()

    {

    MUS_LOG( "mus: [ENGINE] -> CMusEngClipVideoPlayer::LcFilePositionL" )

    TTimeIntervalMicroSeconds currentPosition = PositionMicroSecondsL();

    MUS_LOG1( "mus: [ENGINE] <- CMusEngClipVideoPlayer::LcFilePositionL, %d", 

              currentPosition.Int64() )

    return TTimeIntervalSeconds( static_cast< TInt >( 

        currentPosition.Int64() / KMicroSecondsInOneSecond ) );

    }

// -----------------------------------------------------------------------------

// From MLcSourceFileControl

// -----------------------------------------------------------------------------

//

void CMusEngClipVideoPlayer::SetLcFilePositionL( 

    const TTimeIntervalSeconds& aPosition )

    {

    MUS_LOG1( "mus: [ENGINE] -> CMusEngClipVideoPlayer::SetPositionL ( %d )",

              aPosition.Int() )

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );

    TTimeIntervalMicroSeconds position( 

        KMicroSecondsInOneSecond * static_cast< TInt64 >( aPosition.Int() ) );

    if ( position == 0 )

        {

        iRewindedToBeginning = ETrue;

        }

    file->SetPositionL( position );

    MUS_LOG( "mus: [ENGINE] <- CMusEngClipVideoPlayer::SetPositionL ()" )

    }

// -----------------------------------------------------------------------------

// Check is file DRM protected.

// -----------------------------------------------------------------------------

//

TBool CMusEngClipVideoPlayer::IsProtectedFileL( const TDesC& aClipFile )

    {

    MUS_LOG( "mus: [ENGINE] -> CMusEngClipVideoPlayer::IsProtectedFileL(...)" )

    TBool isDRMProtected = EFalse;

    DRMCommon* drmapi = DRMCommon::NewL();

    CleanupStack::PushL( drmapi );

    User::LeaveIfError( drmapi->Connect() );

    //Check DRM file protection

    User::LeaveIfError( drmapi->IsProtectedFile( aClipFile, isDRMProtected ) );

    drmapi->Disconnect();

    CleanupStack::PopAndDestroy( drmapi );

    MUS_LOG( "mus: [ENGINE] <- CMusEngClipVideoPlayer::IsProtectedFileL(...)" )

    return isDRMProtected;

    }

// -----------------------------------------------------------------------------

//

// -----------------------------------------------------------------------------

//

TTimeIntervalMicroSeconds CMusEngClipVideoPlayer::PositionMicroSecondsL( 

    TBool aActualPosition )

    {

    __ASSERT_ALWAYS( iMceSession, User::Leave( KErrNotReady ) );

    CMceFileSource* file = MusEngMceUtils::GetFileSourceL( *iMceSession );

    TTimeIntervalMicroSeconds position = file->PositionL();

    TTimeIntervalMicroSeconds duration = file->DurationL();

    TTimeIntervalMicroSeconds calculatedPosition;

    // Adjust position if we are fastforwarding or -rewinding

    if ( iFFWDStartTime.Int64() != 0 )

        {

        TTime now;

        now.HomeTime();

        calculatedPosition = KFastWindingFactor *

                             now.MicroSecondsFrom( iFFWDStartTime ).Int64() +

                             position.Int64();

        if ( calculatedPosition > duration )

            {

            calculatedPosition = duration;

            }

        }

    else if ( iFRWDStartTime.Int64() != 0 )

        {

        TTime now;

        now.HomeTime();

        calculatedPosition = position.Int64() -

                             KFastWindingFactor *

                             now.MicroSecondsFrom( iFRWDStartTime ).Int64();

        if ( calculatedPosition < 0 )

            {

            calculatedPosition = 0;

            }

        if ( calculatedPosition == 0 )

            {

            iRewindedToBeginning = ETrue;

            }

        }

    else

        {

        calculatedPosition = position;

        }

    if ( !aActualPosition )

        {

        calculatedPosition = 

            GetVideoSinkRelativeFilePos( calculatedPosition, duration );

        }

    return calculatedPosition;

    }

// -----------------------------------------------------------------------------

// Modifies file position if position has reached end before clip has ended.

// File position is not going in sync with local video playback as playback

// buffers media before starting playing.

// -----------------------------------------------------------------------------

//

TTimeIntervalMicroSeconds CMusEngClipVideoPlayer::GetVideoSinkRelativeFilePos( 

    const TTimeIntervalMicroSeconds& aActualPosition, 

    const TTimeIntervalMicroSeconds& aDuration )

    { 

    MUS_LOG1( "mus: [ENGINE] PositionMicroSecondsL, pos before mod:%d", 

              aActualPosition.Int64() )

    TTimeIntervalMicroSeconds tempCalculatedPosition( aActualPosition );

    if ( iDelayFileEndingPos != 0 )

        {

        iDelayFileEndingPos = aDuration;

        tempCalculatedPosition = iDelayFileEndingPos;

        }

    else

        {

        // FRWD can go to zero even if clip has not ended, do not modify 

        // time in such situation.

        if ( aActualPosition == 0 && 

             !HasClipEnded() && 

             iFRWDStartTime.Int64() == 0 && 

             !iRewindedToBeginning )

            {

            const TInt KMusDelayEndingModifier = 2;

            iDelayFileEndingPos = aDuration.Int64() - 

                iBufferingPeriod.Int64() / KMusDelayEndingModifier;

            tempCalculatedPosition = iDelayFileEndingPos;

            if ( iPreviousPos > tempCalculatedPosition )

                {

                tempCalculatedPosition = iPreviousPos;

                }

            }

        else

            {

            iDelayFileEndingPos = 0;

            }

        if ( iRewindedToBeginning && aActualPosition > 0 )

            {

            iRewindedToBeginning = EFalse;

            }

        if ( tempCalculatedPosition < 0 )

            {

            tempCalculatedPosition = 0;

            }

        }