/*

* Copyright (c) 2007 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:  Implemantation of CCamSnapshot class.

*                Temporary own implementation of MCameraSnapshot. 

*                To be replaced by ECam CCamera::CCameraSnapshot.

*

*/

#include "camcameracontrollerflags.hrh"

#include <e32base.h>

#include <fbs.h>

#include <ecam/camerasnapshot.h>

#include "camlogging.h"

#include "mcamcameraobserver.h"

#include "camcameraevents.h"

#include "cambuffer.h"

#include "cambuffershare.h"

#include "camimagedecoder.h"

#include "cambitmapscaler.h"

#include "camsnapshot.h"

// ===========================================================================

// Local constants

static const TPoint  KDefaultPosition          = TPoint(0,0);

static const TRgb    KDefaultBackgroudColor    = KRgbWhite;

static const TUint32 KSupportedSnapshotFormats = 

   ( CCamera::EFormatFbsBitmapColor4K

   | CCamera::EFormatFbsBitmapColor64K

   | CCamera::EFormatFbsBitmapColor16M

   | CCamera::EFormatFbsBitmapColor16MU

   );                                 

static const TInt    KCallbackPriority         = CActive::EPriorityIdle;

static const TUint   KEventInterest            = ( ECamCameraEventClassImage

                                                 | ECamCameraEventClassVideo

                                                 | ECamCameraEventClassVfData

                                                 );

// ===========================================================================

// Local methods

#ifndef CAMERAAPP_CAPI_V2

// Not needed when new CAPI support ready.

TECAMEvent::TECAMEvent( TUid aEventType, 

                        TInt aErrorCode )

  : iErrorCode( aErrorCode )

  {

  iEventType.iUid = aEventType.iUid;

  #pragma message("camsnapshot.cpp, temporarily define TECAMEvent constructor")

  }

#endif

#include "campointerutility.inl"

using namespace NCamCameraController;

// ===========================================================================

// public constructors and destructor

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

// static 2-phase constructor

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

//

CCamSnapshot* 

CCamSnapshot::NewL( CCamera&              aCamera, 

                    MCameraObserver2&     aObserver,

                    MCamCameraObservable& aObservable )

  {

  CCamSnapshot* self = 

      new (ELeave) CCamSnapshot( aCamera, aObserver, aObservable );

  CleanupStack::PushL( self );

  self->ConstructL();

  CleanupStack::Pop( self );

  return self;  

  }

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

// Destructor

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

//

CCamSnapshot::~CCamSnapshot()

  {

  PRINT( _L("Camera => ~CCamSnapshot") );

  iObservable.DetachObserver( this );

  delete iSnapshotBitmap;

  // No need to Cancel(), destructors do it already.

  delete iIdle;

  delete iDecoder;

  delete iScaler;

  SetImageData( NULL );

  PRINT( _L("Camera <= ~CCamSnapshot") );

  }

// ===========================================================================

// from MCameraSnapshot

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

// SupportedFormats

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

//

TUint32 

CCamSnapshot::SupportedFormats()

  {

  return KSupportedSnapshotFormats;

  }

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

// PrepareSnapshotL

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

//  

void 

CCamSnapshot::PrepareSnapshotL( CCamera::TFormat aFormat, 

                                const TPoint& aPosition, 

                                const TSize& aSize, 

                                const TRgb& aBgColor, 

                                TBool aMaintainAspectRatio )

  {

  PRINT( _L("Camera => CCamSnapshot::PrepareSnapshotL") );

  if( !(KSupportedSnapshotFormats & aFormat) )

    {

    PRINT( _L("Camera <> Not supported format, LEAVE") );

    User::Leave( KErrNotSupported );

    }

  else

    {

    PRINT( _L("Camera <> do prepare..") );

    iSnapshotOn = EFalse;

    iStatus     = KErrNotReady;

    iDecoder->Cancel();

    iScaler->Cancel();

    iSnapshotBitmap->Reset();

    PRINT( _L("Camera <> Init bitmap scaler..") );

    iScaler->InitScalingL( aSize, 

                           Format2DisplayMode( iFormat ), 

                           aMaintainAspectRatio );

    PRINT1( _L("Camera <> Attach as controller observer, interest: %032b"), KEventInterest );

    iObservable.AttachObserverL( this, KEventInterest );

    PRINT( _L("Camera <> Store parameters..") );

    iFormat              = aFormat;

    iPosition            = aPosition;

    iSize                = aSize;

    iBackgroundColor     = aBgColor;

    iMaintainAspectRatio = aMaintainAspectRatio;

    }

  PRINT( _L("Camera <= CCamSnapshot::PrepareSnapshotL") );

  }

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

// PrepareSnapshotL

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

//

void 

CCamSnapshot::PrepareSnapshotL( CCamera::TFormat aFormat,

                                const TSize& aSize, 

                                TBool aMaintainAspectRatio )

  {

  PrepareSnapshotL( aFormat, 

                    KDefaultPosition, 

                    aSize, 

                    KDefaultBackgroudColor, 

                    aMaintainAspectRatio );

  }

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

// SetBgColorL

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

//

void 

CCamSnapshot::SetBgColorL( const TRgb& aBgColor )

  {

  iBackgroundColor = aBgColor;

  }

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

// SetPositionL

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

//

void

CCamSnapshot::SetPositionL( const TPoint& aPosition )

  {

  iPosition = aPosition;

  }

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

// IsSnapshotActive

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

//

TBool 

CCamSnapshot::IsSnapshotActive() const

  {

  return iSnapshotOn;

  }

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

// StartSnapshot

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

//

void 

CCamSnapshot::StartSnapshot()

  {

  iSnapshotOn = ETrue;

  }

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

// StopSnapshot

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

//

void 

CCamSnapshot::StopSnapshot()

  {

  iSnapshotOn = EFalse;

  iUseNextVfFrame = EFalse;

  }

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

// SnapshotDataL

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

//

MCameraBuffer& 

CCamSnapshot::SnapshotDataL( RArray<TInt>& aFrameIndexOrder )

  {

  PRINT( _L("Camera => CCamSnapshot::SnapshotDataL") );

  // Leave if not ready or other error.

  User::LeaveIfError( iStatus );

  if( !iSnapshotOn || !iSnapshotBitmap )

    {

    User::Leave( KErrNotReady );

    }

  // Set the frame order

  aFrameIndexOrder.Reset();

  User::LeaveIfError( aFrameIndexOrder.Append( 0 ) );

  // Client *must* call Release() for the buffer

  CCamBuffer* buffer = CCamBuffer::NewL( *iSnapshotBitmap, NULL );

  PRINT( _L("Camera <= CCamSnapshot::SnapshotDataL") );

  return *buffer;

  }

// ===========================================================================

// From MCamCameraObserver

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

//

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

//

void 

CCamSnapshot::HandleCameraEventL( TInt              aStatus, 

                                  TCamCameraEventId aEventId, 

                                  TAny*             aEventData /*= NULL*/ )

  {

  if( iSnapshotOn )

    {

    switch( aEventId )

      {

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

      // Viewfinder frame ready event

      //

      case ECamCameraEventVfFrameReady:

        {

        if( iUseNextVfFrame )

          {

          iUseNextVfFrame = EFalse;

          // Take the viewfinder frame just as it would be 

          // a still image, just in bitmap format.

          PRINT( _L("Camera <> CCamSnapshot: Storing VF frame as snapshot") );

          // TEMP ==>

          CCamBufferShare* share = NULL;

          TRAPD( error,

            {

            if( KErrNone == aStatus )

              {

              CFbsBitmap* bitmap = new (ELeave) CFbsBitmap;

              CleanupStack::PushL( bitmap );

              User::LeaveIfError( bitmap->Duplicate( static_cast<CFbsBitmap*>( aEventData )->Handle() ) );

              CCamBuffer* buffer = CCamBuffer::NewL( bitmap, NULL );

              CleanupStack::Pop( bitmap );

              CleanupStack::PushL( buffer );             

              share = new (ELeave) CCamBufferShare( buffer );

              CleanupStack::Pop( buffer );

              }

            });

          if( KErrNone != error )

            {

            aStatus = error;

            }

          if( share ) share->Reserve();

          // <== TEMP 

          StartSnapshotProcessing( share, aStatus );

          // TEMP ==>

          if( share ) share->Release();

          // <== TEMP 

          }

        break;

        }

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

      // Image captured event 

      //

      // Need to decode the snapshot from the image data.

      case ECamCameraEventImageData:

        {

        if( !iVideoMode )

          {

          PRINT( _L("Camera <> CCamSnapshot: Starting to decode snapshot") );

          CCamBufferShare* share = static_cast<CCamBufferShare*>( aEventData );

          StartSnapshotProcessing( share, aStatus );

          }

        break;

        }

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

      // Video init might come before snapshot is 

      // initialized, so we do not rely on this event

      // case ECamCameraEventVideoInit:

      //  {        

      //  PRINT( _L("Camera <> CCamSnapshot: Video mode entered") );

      //  break;

      //  }

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

      case ECamCameraEventVideoRelease:

        {

        PRINT( _L("Camera <> CCamSnapshot: Video mode left") );

        iVideoMode = EFalse;

        break;

        }

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

      // Video started event

      //

      // Use next vf frame as snapshot.

      case ECamCameraEventVideoStart:

        {

        PRINT( _L("Camera <> CCamSnapshot: Video started, will use next VF frame as snapshot") );

        SetImageData( NULL );

        if( KErrNone == aStatus )

          {

          iVideoMode      = ETrue;

          iUseNextVfFrame = ETrue;

          }

        break;

        }

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

      // Video stopped. 

      //

      // Provide the vf frame as snapshot.

      case ECamCameraEventVideoStop:

        {

        if( iVideoMode )

          {

          PRINT( _L("Camera <> CCamSnapshot: Video stopped, provide the VF frame snapshot..") );

          // Cancel any activity, if not ready for some reason.

          if( iIdle    ) iIdle->Cancel();

          if( iScaler  ) iScaler->Cancel();

          if( iDecoder ) iDecoder->Cancel(); 

          // Snapshot is in iSnapshotBitmap

          SetImageData( NULL );

          // Need to clear this flag as no events are notified

          // when this flag is on.

          iVideoMode = EFalse;

          PRINT( _L("Camera <> CCamSnapshot: Start snapshot callback") );

          iIdle->Start( TCallBack( SnapshotReadyCallback, this ) );        

          }

        break;

        }

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

      default:

        {

        // Other events ignored

        break;

        }

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

      }

    }

  }

// ===========================================================================

// from MCamImageDecoderObserver

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

// ImageDecoded <<virtual>>

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

//

void 

  {

  PRINT1( _L("Camera => CCamSnapshot::ImageDecoded, status in: %d"), aStatus );

  if( iSnapshotOn )

    {

    iStatus = aStatus;

    iSnapshotBitmap->Reset();

    if( iStatus == KErrNone )

      {

      iStatus = iSnapshotBitmap->Duplicate( aBitmap->Handle() );

      }

    PRINT1( _L("Camera <> status after bitmap duplicate: %d"), iStatus );

    // Release image data, as not used anymore.

    // All that is needed is iSnapshotBitmap.

    SetImageData( NULL );

    if( iStatus == KErrNone )

      {

      iScaler->StartScaling( *iSnapshotBitmap );

      }

    else

      {

      iIdle->Start( TCallBack( SnapshotReadyCallback, this ) );

      }

    }

  PRINT( _L("Camera <= CCamSnapshot::ImageDecoded") );

  }

// ===========================================================================

// from MCamBitmapScalerObserver

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

// BitmapScaled <<virtual>>

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

//

void 

CCamSnapshot::BitmapScaled( TInt aStatus, const CFbsBitmap* aBitmap )

  {

  // Release any data we hold, as it's not needed anymore.

  SetImageData( NULL );

  if( iSnapshotOn )

    {

    iStatus = aStatus;

    iSnapshotBitmap->Reset();

    if( KErrNone == iStatus )

      {

      iStatus = iSnapshotBitmap->Duplicate( aBitmap->Handle() );

      }

    TECAMEvent event( KUidECamEventCameraSnapshot, iStatus );

    iObserver.HandleEvent( event );

    }

  }  

// ===========================================================================

// public new methods

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

// StartSnapshotProcessing

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

//

void 

CCamSnapshot::StartSnapshotProcessing( CCamBufferShare* aBuffer,

                                       TInt             aError )

  {

  PRINT1( _L("Camera => CCamSnapshot::StartSnapshotProcessing, status in:%d"), aError );

  if( iSnapshotOn )

    {

    TRAP( iStatus, DoStartSnapshotProcessingL( aBuffer, aError ) );

    if( iStatus != KErrNone )

      {

      iIdle->Start( TCallBack( SnapshotReadyCallback, this ) );

      }

    }

  PRINT1( _L("Camera <= CCamSnapshot::StartSnapshotProcessing, status out:%d"), aError );

  }