/*

* Copyright (c) 2006 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:  Music Player stautus observer

*

*/

#include <mpxplaybackutility.h>

#include <mpxplaybackmessage.h>

#include <mpxmedia.h>

#include <mpxmediageneraldefs.h>

#include <mpxmediamusicdefs.h>

#include <mpxmessagegeneraldefs.h>

#include <mpxplaybackmessagedefs.h>

#include <mpxalbumartutil.h>

#include <mpxlog.h>

#include "aiplayerpluginengine.h"

const TInt KMPXOneSecInMilliSecs( 1000 );

const TUid  KMusicPlayerAppUid = { 0x102072C3 };

// ======== MEMBER FUNCTIONS ========

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

// CAiPlayerPluginEngine::ConstructL

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

//

void CAiPlayerPluginEngine::ConstructL()

    {

    MPX_DEBUG1("CAiPlayerPluginEngine::ConstructL");

    // Get the playback utility instance from engine.

    //iPlaybackUtility = MMPXPlaybackUtility::NewL( KPbModeActivePlayer, this );

    iPlaybackUtility = MMPXPlaybackUtility::NewL( KMusicPlayerAppUid, this );

    iAlbumArtUtil = CMPXAlbumArtUtil::NewL();

    if (iPlaybackUtility->StateL() == EPbStatePlaying)

        {

    	  RequestMediaL();

        }

    }

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

// CAiPlayerPluginEngine::NewL

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

//

CAiPlayerPluginEngine* CAiPlayerPluginEngine::NewL( 

        MAiPlayerPluginEngineObserver& aObserver )

    {

    MPX_DEBUG1("CAiPlayerPluginEngine::NewL");

    CAiPlayerPluginEngine* self = new ( ELeave ) 

            CAiPlayerPluginEngine( aObserver );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CAiPlayerPluginEngine::CAiPlayerPluginEngine

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

//

CAiPlayerPluginEngine::CAiPlayerPluginEngine( 

        MAiPlayerPluginEngineObserver& aObserver )

    : iObserver( &aObserver ),

      iPlaybackUtility( NULL ),

      iTitle( NULL ),

      iArtist( NULL ),

      iUri( NULL ),

      iMedia( NULL ),

      iPosition( KErrNotFound ),

      iDuration( KErrNotFound ),

      iExtractingAlbumArt( EFalse ),

      iSkipping( EFalse )

    {

    }

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

// CAiPlayerPluginEngine::~CAiPlayerPluginEngine

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

//

CAiPlayerPluginEngine::~CAiPlayerPluginEngine()

    {

    MPX_DEBUG1("CAiPlayerPluginEngine::~CAiPlayerPluginEngine");

    if ( iPlaybackUtility )

        {

        iPlaybackUtility->Close();

        }

    delete iMedia;

    delete iAlbumArtUtil;

    delete iTitle;

    delete iArtist;

    delete iUri;

    }

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

// From MMPXPlaybackObserver

// Handle playback message.

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

//

void CAiPlayerPluginEngine::HandlePlaybackMessage( CMPXMessage* aMessage, 

        TInt aError )

    {

    if ( aError == KErrNone && aMessage )

        {

        TRAP_IGNORE( DoHandlePlaybackMessageL( *aMessage ) );

        }

    }

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

// From MMPXPlaybackCallback

// Handle playback property.

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

//

void CAiPlayerPluginEngine::HandlePropertyL( TMPXPlaybackProperty aProperty, 

        TInt aValue, TInt aError )

    {

    DoHandlePropertyL( aProperty, aValue, aError );

    }

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

// From MMPXPlaybackCallback

// Method is called continously until aComplete=ETrue, signifying that

// it is done and there will be no more callbacks

// Only new items are passed each time

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

//

void CAiPlayerPluginEngine::HandleSubPlayerNamesL(

    TUid /* aPlayer */,

    const MDesCArray* /* aSubPlayers */,

    TBool /* aComplete */,

    TInt /* aError */ )

    {

    // do nothing

    }

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

// From MMPXPlaybackCallback

// Handle media

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

//

void CAiPlayerPluginEngine::HandleMediaL( const CMPXMedia& aMedia, 

        TInt aError )

    {

    MPX_DEBUG1("CAiPlayerPluginEngine::HandleMediaL");

    if ( KErrNone == aError )

        {

        delete iUri;

        iUri = NULL;

        if (aMedia.IsSupported(KMPXMediaGeneralUri))

            {

            TParsePtrC filePath(aMedia.ValueText(KMPXMediaGeneralUri) );

            iUri = filePath.FullName().AllocL();

            }

		delete iTitle;

		iTitle = NULL;

        if ( aMedia.IsSupported( KMPXMediaGeneralTitle ) )

            {

            iTitle = ( aMedia.ValueText( KMPXMediaGeneralTitle ) ).AllocL();

            }

        else if ( aMedia.IsSupported( KMPXMediaGeneralUri ) )

            {

            TParsePtrC filePath( aMedia.ValueText( KMPXMediaGeneralUri ) );

            iTitle = (filePath.Name()).AllocL();

            }

		delete iArtist;

		iArtist = NULL;

		if ( aMedia.IsSupported( KMPXMediaMusicArtist ) )

		    {

		    iArtist = ( aMedia.ValueText( KMPXMediaMusicArtist ) ).AllocL();

		    }

		iObserver->TrackInfoChanged(iTitle ? *iTitle : KNullDesC(), iArtist ? *iArtist : KNullDesC());

		if (!iSkipping)

            {

            if (iExtractingAlbumArt)

                {

                iAlbumArtUtil->CancelRequest();

                iExtractingAlbumArt=EFalse;

                }

            if ( aMedia.IsSupported( KMPXMediaMusicAlbumArtFileName ) )

                {

                delete iMedia;

                iMedia=NULL;

                iMedia = CMPXMedia::NewL( aMedia );

                TRAPD(err,iAlbumArtUtil->ExtractAlbumArtL(

                        *iMedia,

                        *this,

                        TSize(70,70)));

                if (err != KErrNone)

                    {

                    iObserver->AlbumArtChanged(NULL);

                    }

                }

            else

                {

                iObserver->AlbumArtChanged(NULL);

                }

            }

		else

		    {

		    iObserver->AlbumArtChanged(NULL);

		    }

        }

    }

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

// From MMPXPlaybackCallback

// Handle completion of a asynchronous command

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

//

void CAiPlayerPluginEngine::HandlePlaybackCommandComplete( 

        CMPXCommand* /*aCommandResult*/, TInt /*aError*/ )

    {

    // do nothing

    }

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

// From MMPXAlbumArtUtilObserver

// Notify that extraction of album art started.

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

//

void CAiPlayerPluginEngine::ExtractAlbumArtStarted()

    {

    iExtractingAlbumArt = ETrue;

    }

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

// From MMPXAlbumArtUtilObserver

// Notify that the extraction of album art has completed.

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

//

void CAiPlayerPluginEngine::ExtractAlbumArtCompleted( 

        CFbsBitmap* aBitmap, 

        TInt aErr )

    {

    if (aErr == KErrNone)

        {

        iObserver->AlbumArtChanged(aBitmap);

        }

    else

        {

        iObserver->AlbumArtChanged(NULL);

        }

    iExtractingAlbumArt = EFalse;

    }

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

// Get the current state of the active player

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

//

TMPlayerState CAiPlayerPluginEngine::PlayerState()

    {

    MPX_DEBUG1( "CAiPlayerPluginEngine::PlayerState" );

    TMPXPlaybackState state( EPbStateNotInitialised );

    TRAP_IGNORE( state = iPlaybackUtility->StateL() );

    return MapState( state );

    }

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

// CAiPlayerPluginEngine::TitleL

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

//

const TDesC& CAiPlayerPluginEngine::TitleL()

    {

    if ( iTitle )

        {

        return *iTitle;

        }

     else

        {

        RequestMediaL();

        return KNullDesC;

        }

    }

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

// CAiPlayerPluginEngine::Artist

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

//

const TDesC& CAiPlayerPluginEngine::Artist()

    {

    if ( iArtist )

        {

        return *iArtist;

        }

     else

        {

        return KNullDesC;

        }

    }

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

// CAiPlayerPluginEngine::Artist

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

//

const TDesC& CAiPlayerPluginEngine::Uri()

    {

    if ( iUri )

        {

        return *iUri;

        }

     else

        {

        return KNullDesC;

        }

    }

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

// CAiPlayerPluginEngine::Position

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

//

TInt CAiPlayerPluginEngine::Position()

    {

    return iPosition;

    }

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

// CAiPlayerPluginEngine::Duration

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

//

TInt CAiPlayerPluginEngine::Duration()

    {

    return iDuration;

    }

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

// Handle playback message.

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

//

void CAiPlayerPluginEngine::DoHandlePlaybackMessageL( 

        const CMPXMessage& aMessage )

    {

    MPX_DEBUG1("CAiPlayerPluginEngine::DoHandlePlaybackMessageL");

    TMPXMessageId id( 

            aMessage.ValueTObjectL<TMPXMessageId>( KMPXMessageGeneralId ) );

    if ( KMPXMessageGeneral == id )

        {

        TInt event( aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralEvent ) );

        MPX_DEBUG2( "CAiPlayerPluginEngine::DoHandlePlaybackMessageL(%d)", 

                event );

        switch ( event )

            {

            case TMPXPlaybackMessage::EPropertyChanged:

                {

                TInt error( KErrNone );

                DoHandlePropertyL(

                    aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralType ),

                    aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralData ),

                    error );

                break;

                }

            case TMPXPlaybackMessage::EStateChanged:

                {

				TMPXPlaybackState state( 

				        aMessage.ValueTObjectL<TMPXPlaybackState>( 

				                KMPXMessageGeneralType ));

                MPX_DEBUG2("CAiPlayerPluginEngine::HandlePlaybackMessageL - E"

                        "StateChanged(%d)", state);

                DoHandleStateChangedL( state );

                break;

                }

            case TMPXPlaybackMessage::EMediaChanged:

            case TMPXPlaybackMessage::EPlaylistUpdated:

                {

                iPlaybackUtility->PropertyL( *this, EPbPropertyPosition );

                iPlaybackUtility->PropertyL( *this, EPbPropertyDuration );

                RequestMediaL();

                break;

                }

            case TMPXPlaybackMessage::ECommandReceived:

                {

                MPX_DEBUG2("CAiPlayerPluginEngine::HandlePlaybackMessageL - E"

                        "CommandReceived(%d)",

                    aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralType ) );

                break;

                }

            case TMPXPlaybackMessage::EActivePlayerChanged:

                {

                MPX_DEBUG3("CAiPlayerPluginEngine::HandlePlaybackMessageL - E"

                        "ActivePlayerChanged(%d, %d)",

                    aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralType ), 

                    aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralData ) );

                iPlaybackUtility->PropertyL( *this, EPbPropertyPosition );

                iPlaybackUtility->PropertyL( *this, EPbPropertyDuration );

                DoHandleStateChangedL( iPlaybackUtility->StateL() );

                // refresh media property

                RequestMediaL();

                break;

                }

            case TMPXPlaybackMessage::ESkipping:

                {

                MPX_DEBUG1( "CAiPlayerPluginEngine::DoHandlePlaybackMessageL - ESkipping");

                iAlbumArtUtil->CancelRequest();

                iObserver->Opening();

                iSkipping =ETrue;

                break;

                }

            case TMPXPlaybackMessage::ESkipEnd:

                {

                MPX_DEBUG1( "CAiPlayerPluginEngine::DoHandlePlaybackMessageL - ESkipEnd()");

                iSkipping = EFalse;

                break;

                }

            default:

                {

                break;

                }

            }

        }

    }

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

// Handle playback property.

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

//

void CAiPlayerPluginEngine::DoHandlePropertyL( TInt aProperty, TInt aValue, 

        TInt aError )

    {

    MPX_DEBUG4("CAiPlayerPluginEngine::DoHandlePropertyL - Property(%d); Valu"

            "e(%d); Error(%d)", aProperty, aValue, aError );

    if ( KErrNone == aError )

        {

        switch ( aProperty	)

            {

            case EPbPropertyPosition:

                {

				iPosition = aValue / KMPXOneSecInMilliSecs;

                iObserver->PlaybackPositionChanged( iPosition );

                break;

                }

            case EPbPropertyDuration:

                {

				iDuration = aValue / KMPXOneSecInMilliSecs;

                break;

                }

            default:

                {

                break;

                }

            }

        }

    }

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

// Handle playback state changed.

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

//

void CAiPlayerPluginEngine::DoHandleStateChangedL( TMPXPlaybackState aState )

    {

    TMPlayerState state = MapState( aState );

    MPX_DEBUG3("CAiPlayerPluginEngine::DoHandleStateChangedL - State mapped "

            "from (%d) to (%d)", aState, state );

    if (state != EMPlayerStateStarting)

        {

        iObserver->PlayerStateChanged(state);

        }

    else 

        {

        iObserver->Opening();

        }

    }

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

// Displays error notes.

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

//

void CAiPlayerPluginEngine::HandleErrorL( TInt aError )

    {

	MPX_DEBUG2("CAiPlayerPluginEngine::HandleErrorL(%d)", aError );

    }

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

// Map states from TMPXPlaybackState to TMPlayerState

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

//

TMPlayerState CAiPlayerPluginEngine::MapState( TMPXPlaybackState aState )

    {

	TMPlayerState state = EMPlayerStateOther;

    switch ( aState )

        {

        case EPbStatePlaying:

            state = EMPlayerStatePlaying;

            break;

        case EPbStatePaused:

            state = EMPlayerStatePaused;

            break;

        case EPbStateSeekingForward:

        case EPbStateSeekingBackward:

            state = EMPlayerStateSeeking;

            break;

        case EPbStateNotInitialised:

        case EPbStateInitialising:

            state = EMPlayerStateStarting;

            break;

        case EPbStateStopped:

            state = EMPlayerStateStopped;

            break;

        default:

            break;

        }

    return state;

    }

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

// Requests Media.

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

//

void CAiPlayerPluginEngine::RequestMediaL()