1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #include "ImageClientMain.h"

    17 #include "ImageConversionPriv.h"

    18 #include "icl/ImagePlugin.h"

    19 #include "icl/ImageConstruct.h"

    20 #include "ImageConversion.h"

    21 

    22 

    23 

    24 const TInt KMaxDstBufferSize = 4096;

    25 

    26 /* IMAGE DECODER PRIVATE */

    27 CImageDecoderPriv::CImageDecoderPriv(CImageDecodeConstruct* aConstruct, MImageDecoderPrivSupport* aSupport)

    28 	: CActive(CActive::EPriorityIdle), iImageType(CImageDecoder::EImageTypeMain), iConstruct(aConstruct), iSupport(aSupport), iReadOnly(EFalse), iUseBufferReadOptimization(ETrue)

    29 	{

    30 	ASSERT(aConstruct != NULL);

    31 	ASSERT(aSupport != NULL);

    32 	CActiveScheduler::Add(this);

    33 	}

    34 

    35 void CImageDecoderPriv::SetFileL(RFs& aFs, const TDesC& aSourceFilename, const CImageDecoder::TOptions aOptions)

    36 	{

    37 	iFs = &aFs;

    38 	iOptions = aOptions;

    39 	iImageParameterData.SetFilenamePtr(&aSourceFilename);

    40 	delete iContent;

    41 	iContent = NULL;

    42 	delete iData;

    43 	iData = NULL;

    44 	iReadOnly=ETrue;

    45 	TRAPD(err, iContent = CContent::NewL(*iImageParameterData.SourceFilenamePtr(), EContentShareReadOnly));

    46 	if (err!= KErrNone && err != KErrNoMemory)

    47 		{

    48 		iReadOnly=EFalse;

    49 		iContent = CContent::NewL(*iImageParameterData.SourceFilenamePtr(), EContentShareReadWrite);

    50 		}

    51 	User::LeaveIfNull(iContent);

    52 	iData = iContent->OpenContentL(iIntent, (iUniqueId) ? static_cast<TDesC&>(*iUniqueId) : KDefaultContentObject());

    53 	

    54 	//Try to find if content is DRM

    55     TInt value = -1;

    56     TInt getAttrResult =iContent->GetAttribute(EIsProtected, value);

    57     if(getAttrResult != KErrNone || value!=0)

    58         {

    59         //either we had an error from getAttribute or  EIsProtected is not set to 0 (false)

    60         //Could be DRM content, don't apply iUseBufferReadOptimization

    61         iUseBufferReadOptimization = EFalse;

    62         }   

    63     

    64 	iCachedDataSize = -1;

    65     }

    66 	

    67 void CImageDecoderPriv::SetFileL(RFile& aFile, const CImageDecoder::TOptions aOptions)

    68 	{

    69 	iOptions = aOptions;

    70 	User::LeaveIfError(aFile.Name(iFileName));

    71 	iImageParameterData.SetFilenamePtr(&iFileName);

    72 	delete iContent;

    73 	iContent = NULL;

    74 	delete iData;

    75 	iData = NULL;

    76 	iContent = CContent::NewL(aFile);

    77 	iData = iContent->OpenContentL(iIntent, (iUniqueId) ? static_cast<TDesC&>(*iUniqueId) : KDefaultContentObject());

    78 	

    79 	//Try to find if content is DRM

    80     TInt value = -1;

    81     TInt getAttrResult =iContent->GetAttribute(EIsProtected, value);

    82     if(getAttrResult != KErrNone || value!=0)

    83         {

    84         //either we had an error from getAttribute or EIsProtected is not set to 0 (false)

    85         //Could be DRM content, don't apply iUseBufferReadOptimization

    86         iUseBufferReadOptimization = EFalse;

    87         }   

    88 	

    89 	iCachedDataSize = -1;        

    90 	}

    91 

    92 void CImageDecoderPriv::SetDataL(RFs& aFs, const TDesC8& aSourceData, const CImageDecoder::TOptions aOptions)

    93 	{

    94 	iFs = &aFs;

    95 	iOptions = aOptions;

    96 	iImageParameterData.SetDataPtr(&aSourceData);

    97 	}

    98 

    99 CImageDecoderPriv* CImageDecoderPriv::NewL(CImageDecodeConstruct* aConstruct, MImageDecoderPrivSupport* aSupport)

   100 	{

   101 	CImageDecoderPriv* self = new (ELeave) CImageDecoderPriv(aConstruct, aSupport);

   102 	return self;

   103 	}

   104 

   105 CImageDecoderPriv::~CImageDecoderPriv()

   106 	{

   107 	ASSERT(!IsActive());

   108 	if (iPlugin)

   109 		iPlugin->Cleanup();

   110 	iFrameInfo.ResetAndDestroy();

   111 	iFrameData.ResetAndDestroy();

   112 	delete iImageReadCodec; // Created in ScanDataL()

   113 	delete iData;

   114 	delete iContent;

   115 	delete iPlugin;

   116 	delete iUniqueId;

   117 	}

   118 

   119 void CImageDecoderPriv::Cleanup()

   120 	{

   121 	delete iReadBuffer; iReadBuffer = NULL;	

   122 	}

   123 

   124 void CImageDecoderPriv::CreatePluginL()

   125 	{

   126 	iPlugin = iConstruct->NewPluginL();

   127 	iPlugin->iProperties = this;

   128 	}

   129 

   130 /**

   131 @see CImageDecoder::SetImageTypeL

   132 */

   133 void CImageDecoderPriv::SetImageTypeL(TInt aImageType)

   134 	{

   135 	if (aImageType == iImageType)

   136 		{

   137 		return;

   138 		}

   139 

   140 	if ( (aImageType == CImageDecoder::EImageTypeThumbnail) &&

   141 		 (iThumbnailData == NULL) )

   142 		{

   143 		User::Leave(KErrNotFound);

   144 		}

   145 	

   146 	TInt prevImageType = iImageType;	

   147 	iImageType = aImageType;

   148 	

   149 	// Delete the old read codec - a new one will be instantiated by the 

   150 	// plugin on notification of Image Type change.

   151 	delete iImageReadCodec;

   152 	iImageReadCodec = NULL;

   153 	iCurrentFrame = 0;

   154 	iPosition = 0;

   155 	TRAPD(err,iPlugin->NotifyImageTypeChangeL(aImageType));

   156 	if(err != KErrNone)

   157 		{

   158 		delete iImageReadCodec;

   159 		iImageReadCodec = NULL;

   160 		// Try to switch back to the main image

   161 		iImageType = prevImageType;

   162 		TRAPD(err2,iPlugin->NotifyImageTypeChangeL(prevImageType));

   163 		if (err2 != KErrNone)

   164 			{

   165 			// Switching back to the main image type shouldn't fail as corrupt as it has been done once before 

   166 			// when creating the decoder.

   167 			__ASSERT_DEBUG( (err2 != KErrCorrupt), Panic( EInvalidFunctionLeave ) );

   168 			User::Leave(err2);

   169 			}

   170 		// We report the thumbnail problem to the application

   171 		User::Leave(err);

   172 		}

   173 	}

   174 

   175 void CImageDecoderPriv::SetThumbnailData(HBufC8* aThumbnailData)

   176 	{

   177 	// The buffer containing the thumbnail data is owned by the plugin

   178 	iThumbnailData = aThumbnailData;

   179 	}

   180 

   181 /*

   182 Disable optimization of this function by the VC compiler.

   183 This function suffers from the known behaviour of setjmp()/longjmp()

   184 used by the TRAP() harness in that register variables can be 'stomped'

   185 by the longjmp/leave process. 

   186 */

   187 #ifdef __VC32__

   188 #pragma optimize("",off)

   189 #endif  // __VC32__

   190 void CImageDecoderPriv::Convert(RThread& aRequestThread, TRequestStatus* aRequestStatus, CFbsBitmap& aDestination, TInt aFrameNumber)

   191 	{

   192 	if (IsActive())

   193 		Panic(EConvertCalledWhileBusy);

   194 	

   195 

   196 	iRequestThread = &aRequestThread;

   197 	iConvStatus = aRequestStatus;

   198  	*iConvStatus = KRequestPending;

   199 

   200 	iCurrentFrame = aFrameNumber;

   201 	if (iCurrentFrame < 0 || iCurrentFrame >= iFrameInfo.Count())

   202 		{

   203 		RequestComplete(KErrArgument);

   204 		return;

   205 		}

   206 	

   207 	if (aDestination.Handle() == 0)

   208 		Panic(ENoDestinationBitmap);

   209 	

   210    if(aDestination.ExtendedBitmapType()!=KNullUid)

   211         {

   212         RequestComplete(KErrNotSupported);

   213         return;

   214         }

   215 	

   216 	iDestination = &aDestination;

   217 	iDestinationHandle = iDestination->Handle();

   218 	iDestinationSize = iDestination->SizeInPixels();

   219 	iDestinationMask = NULL;

   220 	TRAPD(error, iPlugin->InitConvertL());

   221 

   222 	if (error!=KErrNone)

   223 		RequestComplete(error);

   224 	else

   225 		SelfComplete(KErrNone);

   226 	}

   227 #ifdef __VC32__

   228 #pragma optimize("",on)

   229 #endif  // __VC32__

   230 

   231 void CImageDecoderPriv::Convert(RThread& aRequestThread, TRequestStatus* aRequestStatus, CFbsBitmap& aDestination, CFbsBitmap& aDestinationMask, TInt aFrameNumber)

   232 	{	

   233 	if (IsActive())

   234 		Panic(EConvertCalledWhileBusy);

   235 

   236 	iRequestThread = &aRequestThread;

   237 	iConvStatus = aRequestStatus;

   238 	*iConvStatus = KRequestPending;

   239 

   240 	iCurrentFrame = aFrameNumber;

   241 	if (iCurrentFrame < 0 || iCurrentFrame >= iFrameInfo.Count())

   242 		{

   243 		RequestComplete(KErrArgument);

   244 		return;

   245 		}

   246 	

   247 	if (aDestination.Handle() == 0)

   248 		Panic(ENoDestinationBitmap);

   249 	

   250    if(aDestination.ExtendedBitmapType()!=KNullUid || (aDestinationMask.Handle()!=0 && aDestinationMask.ExtendedBitmapType()!=KNullUid))

   251         {

   252         RequestComplete(KErrNotSupported);

   253         return;

   254         }

   255 

   256 	iDestination = &aDestination;

   257 	iDestinationHandle = iDestination->Handle();

   258 	iDestinationSize = iDestination->SizeInPixels();

   259 

   260 	if (aDestinationMask.Handle() == 0)

   261 		Panic(ENoBitmapMask);

   262 	else

   263 		{

   264 		// if we have an alpha channel mask, insist an EGray256 mask bitmap

   265 		// else allow either an EGray2 or an EGray256 one

   266 		// ie. for compatability allow an EGray256 mask bitmap, even if we only have binary data

   267 		TDisplayMode maskDisplayMode = aDestinationMask.DisplayMode();

   268 		const TFrameInfo& frameInfo = FrameInfo(iCurrentFrame);

   269 		if (!(maskDisplayMode==EGray256 || 

   270 			(maskDisplayMode==EGray2 && !(frameInfo.iFlags & TFrameInfo::EAlphaChannel))))

   271 			{

   272 			RequestComplete(KErrArgument);

   273 			return;

   274 			}

   275 		// furthermore, if we have a mask, enforce is same size as destination

   276 		if (iDestinationSize != aDestinationMask.SizeInPixels())

   277 			{

   278 			RequestComplete(KErrArgument);

   279 			return;

   280 			}

   281 		}

   282 

   283 	iDestinationMask = &aDestinationMask;

   284 	iDestinationMaskHandle = iDestinationMask->Handle();

   285 	

   286 	TRAPD(error, iPlugin->InitConvertL());

   287 

   288 	if (error!=KErrNone)

   289 		RequestComplete(error);

   290 	else

   291 		SelfComplete(KErrNone);

   292 	}

   293 

   294 void CImageDecoderPriv::ContinueConvert(RThread& aRequestThread, TRequestStatus* aRequestStatus)

   295 	{

   296 	// NB Not busy and iCurrentProcessingData==true -> we previously stopped on an underflow

   297 	// if not true we must have stopped for some other reason and ContinueConvert is illegal

   298 

   299 	if (IsActive())

   300 		Panic(EConvertCalledWhileBusy);

   301 

   302 	if (!iCurrentlyProcessingData)

   303 		Panic(EIllegalContinueConvert);

   304 

   305 	ASSERT(iPlugin->ValidDestination()); // if legal we should have an iDestination. Whether iMask depends.

   306 

   307 	if (iDestination->Handle() != iDestinationHandle)

   308 		Panic(EDifferentDestinationBitmap);

   309 

   310 	if (iDestinationMask && (iDestinationMask->Handle() != iDestinationMaskHandle))

   311 		Panic(EDifferentDestinationMask);

   312 

   313 	if (iDestination->SizeInPixels() != iDestinationSize)

   314 		Panic(EModifiedDestination);

   315 

   316 	iRequestThread = &aRequestThread;

   317 	iConvStatus = aRequestStatus;

   318 	*iConvStatus = KRequestPending;

   319 

   320 	SelfComplete(KErrNone);

   321 	return;

   322 	}

   323 

   324 

   325 TInt CImageDecoderPriv::DataSizeL()

   326     {

   327     TInt dataSize = iCachedDataSize;

   328     if (dataSize == -1)

   329         {

   330         iData->DataSizeL(dataSize);

   331         if(iReadOnly)

   332              iCachedDataSize = dataSize;

   333         }

   334     

   335     return dataSize;

   336     }

   337 

   338 void CImageDecoderPriv::PrepareForProcessFrameL()

   339 	{

   340 	TInt localSrcLength;

   341 	TBool srcHasGrown = EFalse;

   342 

   343 	if (iImageParameterData.IsFilename())

   344 		{

   345 		ASSERT(iData);

   346 		

   347         if(iUseBufferReadOptimization)

   348             {

   349             localSrcLength = DataSizeL();

   350             }

   351         else

   352             {

   353             iData->DataSizeL(localSrcLength);

   354             }

   355 		}

   356 	else

   357 		{

   358 		localSrcLength = iImageParameterData.SourceDataPtr()->Length();

   359 		}

   360 

   361 	if (localSrcLength > iSrcLength)

   362 		srcHasGrown = ETrue;

   363 

   364 	iSrcLength = localSrcLength;

   365 	if ((iSrcDes.Length() == 0) || srcHasGrown)

   366 		{

   367 		// Fetch next buffer.

   368 		// Get next block size.

   369 		iCurrentBlockLength = iBlockLength;

   370 		if ((iCurrentBlockLength + iPosition) > iDataLength)

   371 			{

   372 			// If current position + read buffer length > Data length then

   373 			// iCurrentBlockLength = what ever's left in iDataLength

   374 			iCurrentBlockLength = Max(0, iDataLength - iPosition);

   375 			}

   376 

   377 		// Get the next block of data

   378 		TPtrC8 ptr;

   379 		ReadDataL((iPosition + iStartPosition), ptr, iCurrentBlockLength);

   380 

   381 		// Set iSrcDes to point at next block in the source data.

   382 		iSrcDes.Set(ptr);

   383 		iCurrentBlockLength = iSrcDes.Length();

   384 		}

   385 

   386 	iOldSrcDesLength = iSrcDes.Length();

   387 	}

   388 

   389 

   390  

   391 /**

   392 * Issues a read operation by sending the start position

   393 * along with the destination descriptor and size.

   394 *

   395 * When this function is used to read data from a file, it

   396 * can send the start position and length in one IPC operation,

   397 * and so avoid having to issue a seek first.

   398 *

   399 * Because ContentAccess::CData does not support a synchronous

   400 * version of this API, this function takes care of waiting for

   401 * the operation to complete, and leaves with any error code.

   402 * This simplifies the calling code.

   403 *

   404 * @param   aPosition       Position in source data to read from.

   405 * @param   aDest           The data is written into this descriptor.

   406 * @param   aSize           Amount of data to read in bytes.

   407 * @leave                   Any Symbian OS error code.

   408 */

   409 void CImageDecoderPriv::SeekReadL(TInt aPosition, TDes8& aDest, TInt aSize)

   410     {

   411     #ifdef __WINS__

   412         RDebug::Printf("sr,%d,%d", aPosition, aSize);

   413     #endif

   414         

   415     TRequestStatus rs;

   416     TInt result=iData->Read(aPosition, aDest, aSize, rs);

   417     User::LeaveIfError(result);

   418     User::WaitForRequest(rs);

   419     User::LeaveIfError(rs.Int());

   420     }

   421 

   422 

   423 void CImageDecoderPriv::DoConvert()

   424 	{

   425 	TRAPD(errCode, PrepareForProcessFrameL());

   426 

   427 	if (errCode!=KErrNone)

   428 		{

   429 		RequestComplete(errCode);

   430 		return;

   431 		}

   432 

   433 	TFrameState codecState = EFrameIncomplete; 

   434 	if (iCurrentBlockLength)

   435 		TRAP(errCode, codecState = iImageReadCodec->ProcessFrameL(iSrcDes));

   436 	

   437 	HandleProcessFrameResult(errCode, codecState);

   438 	}

   439 

   440 void CImageDecoderPriv::HandleProcessFrameResult(TInt aErrCode, TFrameState aCodecState)

   441 	{

   442 	if (aErrCode!=KErrNone)

   443 		{

   444 		ASSERT(aErrCode != KErrUnderflow);

   445 		iCurrentlyProcessingData = EFalse;

   446 		RequestComplete(aErrCode);

   447 		return;

   448 		}

   449 

   450 	TInt newSrcDesLength = iSrcDes.Length();

   451 	iPosition += iOldSrcDesLength - newSrcDesLength;

   452 

   453 	if (aCodecState == EFrameIncompleteRepositionRequest)

   454 		{

   455 		TInt length   = iBlockLength;

   456 		TInt position = iPosition + iStartPosition;

   457 		iImageReadCodec->GetNewDataPosition(position, length);

   458 		if (position<0)

   459 			{

   460 			iCurrentlyProcessingData = EFalse;

   461 			RequestComplete(KErrCorrupt);

   462 			return;

   463 			}

   464 

   465 		iPosition = position-iStartPosition;

   466 		}

   467 	

   468 	if (aCodecState == EBlockComplete)	// Block decoded successfully

   469 		{

   470 		iCurrentlyProcessingData = EFalse; // To avoid call of ContinueConvert()

   471 		RequestComplete(KErrNone);

   472 		return;

   473 		}

   474 	

   475 	if (aCodecState == EFrameComplete)	// Frame decoded successfully

   476 		{

   477 		iImageReadCodec->Complete();

   478 		iCurrentlyProcessingData = EFalse;

   479 

   480 		RequestComplete(KErrNone);

   481 		return;

   482 		}

   483 	else if (newSrcDesLength == iOldSrcDesLength && iCurrentlyProcessingData) // Needs more data than is currently present in the buffer to make progress

   484 		{

   485 		//call of ContinueConvert() only

   486 		 //The following method call is required so that codecs can get the data already decoded can be displayed

   487 		iImageReadCodec->Complete();

   488 		RequestComplete(KErrUnderflow);

   489 		return;

   490 		}

   491 

   492 	// Each Plug-in has to trigger the active object as it needs RunL called again.

   493 	iSrcDes.SetLength(0);

   494 	SelfComplete(KErrNone);

   495 	}

   496 

   497 TBufPtr8& CImageDecoderPriv::SourceData()

   498 	{

   499 	return iSrcDes;

   500 	}

   501 

   502 

   503 void CImageDecoderPriv::RunL()

   504 	{

   505 	ASSERT(iStatus==KErrNone); // we don't handle errors at this point. Should only get here on KErrNone

   506 	iPlugin->DoConvert();

   507 	}

   508 

   509 void CImageDecoderPriv::RequestComplete(TInt aReason)

   510 	{

   511 	ASSERT(iPlugin);

   512 	iPlugin->NotifyComplete();

   513 	ASSERT(iRequestThread);

   514 

   515 	if (iData && aReason == KErrNone && !iIntentHasBeenExecuted)

   516 		{

   517 		TInt err = iData->ExecuteIntent(iIntent);

   518 		if(err == KErrNone)

   519 			{

   520 			//Intent has been executed. Ensure it is not executed again for this image.

   521 			iIntentHasBeenExecuted = ETrue;

   522 			}

   523 		else

   524 			{

   525 			aReason = err;

   526 			}

   527 		}

   528 

   529 	if (iConvStatus && (*iConvStatus == KRequestPending) )

   530 		{

   531 		iRequestThread->RequestComplete(iConvStatus, aReason);

   532 		}

   533 	}

   534 

   535 void CImageDecoderPriv::DoCancel()

   536 	{

   537 	iPlugin->Cleanup();

   538 

   539 	// if SetSelfPending() has been called but not SelfComplete()

   540 	// (i.e. the AO is active but there's still an outstanding request)

   541 	// then we need to complete the request

   542 	if (IsActive() && iStatus == KRequestPending)

   543 		SelfComplete(KErrCancel);

   544 

   545 	RequestComplete(KErrCancel);

   546 	}

   547 

   548 void CImageDecoderPriv::SelfComplete(TInt aReason)

   549 	{

   550 	if (!IsActive())	// may already be active if SetSelfPending() called

   551 		SetActive();

   552 	TRequestStatus* status = &iStatus;

   553 	User::RequestComplete(status, aReason);

   554 	}

   555 

   556 void CImageDecoderPriv::SetSelfPending()

   557 	{

   558 	iStatus = KRequestPending;

   559 	SetActive();

   560 	}

   561 

   562 void CImageDecoderPriv::ContinueProcessingHeaderL()

   563 	{

   564 	iCurrentFrame = iFrameInfo.Count();

   565 	iProcessingFrameInfo = EFalse;

   566 

   567 	if (iCurrentFrame)

   568 		{

   569 		TInt previousFrame = iCurrentFrame-1;

   570 		iPosition = iFrameInfo[previousFrame]->iCurrentDataOffset;

   571 		if (iFrameInfo[previousFrame]->iCurrentFrameState == TFrameInfo::EFrameInfoProcessingFrame)

   572 			{

   573 			iCurrentFrame--;

   574 			iProcessingFrameInfo = ETrue;

   575 			}

   576 		}

   577 		else

   578 			iPosition = 0;

   579 

   580 	TInt error;

   581 	if (iImageReadCodec)

   582 		{

   583 		TRAP(error,iPlugin->ReadFrameHeadersL());

   584 		}

   585 	else

   586 		{

   587 		TRAP(error,iPlugin->ScanDataL());

   588 		}

   589 

   590 	if (error!=KErrNone && error!=KErrUnderflow) // ignore underflow at this point

   591 		User::Leave(error);

   592 	}

   593 

   594 void CImageDecoderPriv::CreateFrameInfoL()

   595 	{

   596 	// Create a new instance of TFrameInfo and initialise it.

   597 	// Insert it into the frame info array and store the frame offset.

   598 	// Mark the frame as being processed.

   599 	TFrameInfo* newFrameInfo = new(ELeave) TFrameInfo(iImageInfo);

   600 

   601 	CleanupStack::PushL(newFrameInfo); // push in case insert fails

   602 	User::LeaveIfError(iFrameInfo.Insert(newFrameInfo, iCurrentFrame));

   603 	CleanupStack::Pop(); // newFrameInfo

   604 				

   605 	iFrameInfo[iCurrentFrame]->iFrameDataOffset = iNextFrameOffset;

   606 	iProcessingFrameInfo = EFalse;

   607 

   608 	CFrameImageData* newFrameData = CFrameImageData::NewL(iImageData);

   609 	CleanupStack::PushL(newFrameData);

   610 				

   611 	User::LeaveIfError(iFrameData.Insert(newFrameData, iCurrentFrame));

   612 	CleanupStack::Pop(); // newFrameData

   613 

   614 	iImageReadCodec->SetCurrentFrame(iCurrentFrame);

   615 	iImageReadCodec->InitFrameHeader(*iFrameInfo[iCurrentFrame], *iFrameData[iCurrentFrame]);

   616 	}

   617 

   618 void CImageDecoderPriv::DeleteFrameInfoL()

   619 	{

   620 	// If process data needs another block but we don't have one because

   621 	// this block is incomplete.

   622 	if (iFrameInfo.Count()>1)

   623 		{

   624 		// Delete the new frame as it is incomplete.

   625 		iSupport->Lock();

   626 		delete iFrameInfo[iCurrentFrame];

   627 		iFrameInfo.Remove(iCurrentFrame);

   628 

   629 		delete iFrameData[iCurrentFrame];

   630 		iFrameData.Remove(iCurrentFrame);

   631 

   632 		iHaveCompleteImageHeaders = EFalse;

   633 		iSupport->Unlock();

   634 		iSupport->SaveFrameCount(FrameCount());

   635 		return;

   636 		}

   637 	else //may need to do some more clean-up

   638 		{

   639 		// No headers at all, so just leave.

   640 		iSupport->Lock();

   641 		iFrameInfo.ResetAndDestroy();

   642 		iFrameData.ResetAndDestroy();

   643 		iSupport->Unlock();

   644 		iSupport->SaveFrameCount(FrameCount());

   645 		User::Leave(KErrUnderflow);

   646 		}

   647 	}

   648 

   649 void CImageDecoderPriv::ReadFrameHeadersL()

   650 	{

   651 	ASSERT(iImageReadCodec); // further down, assumes we can call ProcessHeaderL on the codec

   652 

   653 	TFrameState codecState;

   654 	TFrameInfo::TFrameInfoState frameState;

   655 

   656 	iNextFrameOffset = iPosition;

   657 	iCurrentlyProcessingData = EFalse;

   658 	iBlockLength = iPlugin->FrameHeaderBlockSize(iCurrentFrame);

   659 

   660 	do

   661 		{ 

   662 		iSrcLength = iBlockLength;

   663 		if ((iSrcLength + iPosition) > iDataLength)

   664 			{

   665 			// If current position + read buffer length > Data length then

   666 			// srcLength = what ever's left in iDataLength

   667 			iSrcLength = Max(0, iDataLength - iPosition);

   668 			}

   669 

   670 		TPtrC8 ptr;

   671 		ReadDataL((iPosition + iStartPosition), ptr, iSrcLength);

   672 		iSrcDes.Set(ptr);

   673 		iSrcLength = iSrcDes.Length();

   674 

   675 		TInt err;

   676 		if (!iProcessingFrameInfo)

   677 			{

   678 			iSupport->Lock();

   679 

   680 			//Do not leave between lock and unlock

   681 			TRAP(err, CreateFrameInfoL());

   682 

   683 			iSupport->Unlock();

   684 			if (err != KErrNone)

   685 				{	// In case of leave, we need to reset the pointer arrays

   686 				iSupport->Lock();

   687 				iFrameInfo.ResetAndDestroy();

   688 				iFrameData.ResetAndDestroy();

   689 				iSupport->Unlock();

   690 				iSupport->SaveFrameCount(FrameCount());

   691 				User::Leave(err);

   692 				}

   693 

   694 			iSupport->SaveFrameCount(FrameCount());

   695 			}

   696 

   697 		// Process Header for one frame.

   698 		codecState = EFrameIncomplete;

   699 		err = KErrUnderflow;

   700 		if (iSrcLength)

   701 			TRAP(err, codecState = iImageReadCodec->ProcessFrameHeaderL(iSrcDes));

   702 

   703 		if ((err != KErrNone) && (err != KErrUnderflow))

   704 			User::Leave(err);

   705 		

   706 		TInt newSrcLength = iSrcDes.Length();

   707 		frameState = iFrameInfo[iCurrentFrame]->iCurrentFrameState;

   708 		if ((err == KErrUnderflow) || ((codecState == EFrameIncomplete) && (iSrcLength == newSrcLength)))

   709 			{

   710 			if ((frameState == TFrameInfo::EFrameInfoUninitialised) || (frameState == TFrameInfo::EFrameInfoProcessingFrameHeader))

   711 				DeleteFrameInfoL();

   712 			return;

   713 			}

   714 

   715 		if (codecState == EFrameIncompleteRepositionRequest)

   716 			{

   717 			TInt length   = iBlockLength;

   718 			TInt position = iPosition+iStartPosition;

   719 			iImageReadCodec->GetNewDataPosition(position, length);

   720 			if (position<0)

   721 				User::Leave(KErrCorrupt);

   722 

   723 			iPosition = position-iStartPosition;

   724 			}

   725 		else

   726 			iPosition += iSrcLength - newSrcLength;

   727 

   728 		iNextFrameOffset = iPosition; // Store next frame header offset.

   729 		iProcessingFrameInfo = (frameState == TFrameInfo::EFrameInfoProcessingFrameHeader) || (frameState == TFrameInfo::EFrameInfoProcessingFrame);

   730 		if ((frameState == TFrameInfo::EFrameInfoProcessingFrame) || (frameState == TFrameInfo::EFrameInfoProcessingComplete))

   731 			{

   732 			iFrameInfo[iCurrentFrame]->iCurrentDataOffset = iPosition;

   733 

   734 			if (frameState == TFrameInfo::EFrameInfoProcessingComplete)

   735 				iCurrentFrame++;

   736 			}

   737 		}

   738 	while ((codecState == EFrameIncomplete) || (codecState == EFrameIncompleteRepositionRequest));

   739 

   740 	// Frame header read complete

   741 	if(frameState == TFrameInfo::EFrameInfoProcessingFrameHeader)

   742 		DeleteFrameInfoL();

   743 

   744 	iHaveCompleteImageHeaders = ETrue;

   745 	}

   746 

   747 void CImageDecoderPriv::InitConvertL()

   748 	{

   749 	ASSERT((iCurrentFrame >= 0) && (iCurrentFrame < iFrameInfo.Count()));

   750 

   751 	// Set position to start of frame.

   752 	iPosition = iFrameInfo[iCurrentFrame]->iFrameDataOffset;

   753 

   754 	// Re-set conversion variables.

   755 	iSrcLength = 0;

   756 

   757 	// Set flag to say that we are now converting an image.

   758 	iCurrentlyProcessingData = ETrue;

   759 

   760 	// Re-initialise block length and codec

   761 	iBlockLength = iPlugin->FrameBlockSize(iCurrentFrame);

   762 

   763 	TBool disableErrorDiffusion = (iOptions & CImageDecoder::EOptionNoDither);

   764 	iImageReadCodec->SetCurrentFrame(iCurrentFrame);

   765 	iImageReadCodec->InitFrameL(*iFrameInfo[iCurrentFrame], *iFrameData[iCurrentFrame], disableErrorDiffusion,  *iDestination, iDestinationMask);

   766 

   767 	}

   768 

   769 void CImageDecoderPriv::RequestInitL(TInt aFrameNumber)

   770 	{

   771 	__ASSERT_ALWAYS(!IsActive(), Panic(EConvertCalledWhileBusy));

   772 	__ASSERT_ALWAYS((aFrameNumber >= 0) && (aFrameNumber < iFrameInfo.Count()), User::Leave(KErrArgument));

   773 

   774 	// Set current frame.

   775 	iCurrentFrame = aFrameNumber;

   776 	iImageReadCodec->SetCurrentFrame(iCurrentFrame);

   777 

   778 	// Set position to start of frame.

   779 	iPosition = iFrameInfo[iCurrentFrame]->iFrameDataOffset;

   780 

   781 	// Re-set conversion variables.

   782 	iSrcLength = 0;

   783 

   784 	// Set flag to say that we are now converting an image.

   785 	iCurrentlyProcessingData = ETrue;

   786 

   787 	// Re-initialise block length and codec

   788 	iBlockLength = iPlugin->FrameBlockSize(iCurrentFrame);

   789 	}

   790 	

   791 const TFrameInfo& CImageDecoderPriv::FrameInfo(TInt aFrameNumber) const

   792 	{

   793 	// Return the frame info for a particular frame

   794 	__ASSERT_ALWAYS((aFrameNumber >= 0) && (aFrameNumber < iFrameInfo.Count()), Panic(EFrameNumberOutOfRange));

   795 	return *iFrameInfo[aFrameNumber];

   796 	}

   797 

   798 CFrameInfoStrings* CImageDecoderPriv::FrameInfoStringsLC(TInt aFrameNumber)

   799 	{

   800 	CFrameInfoStrings* frameInfoStrings;

   801 	if (iFs == NULL)

   802 		{

   803 		RFs localRFs;

   804 		CleanupClosePushL(localRFs);

   805 

   806 		User::LeaveIfError(localRFs.Connect());

   807 		frameInfoStrings = iPlugin->FrameInfoStringsL(localRFs, aFrameNumber);

   808 		CleanupStack::PopAndDestroy(); // localRFs

   809 		}

   810 	else

   811 		frameInfoStrings = iPlugin->FrameInfoStringsL(*iFs, aFrameNumber);

   812 

   813 	CleanupStack::PushL(frameInfoStrings);

   814 	return frameInfoStrings;

   815 	}

   816 

   817 void CImageDecoderPriv::ReadDataL(TInt aPosition, TPtrC8& aReadBuffer, TInt aLength)

   818 	{

   819 	ASSERT(aPosition >= 0); 

   820  	ASSERT(aLength >= 0);	

   821 

   822 	TBool srcIsFile = ETrue;

   823 	TInt  srcSize = 0;

   824 	TInt  size = aLength;

   825 

   826 	if (iImageType == CImageDecoder::EImageTypeThumbnail) 

   827 		{

   828 		ASSERT(iThumbnailData!=NULL);

   829 		

   830 		srcSize = iThumbnailData->Length();

   831 		

   832 		// if trying to start reading past end of file do nothing

   833 		if(aPosition >= srcSize)

   834 			{

   835 			aReadBuffer.Set(KNullDesC8);

   836 			return;

   837 			}

   838 

   839 		if((aPosition + size) > srcSize)

   840 			{

   841 			// there is not enough data left read what is left.

   842 			size = srcSize - aPosition;

   843 			}

   844 

   845 		const TDesC8* srcDes = iThumbnailData;

   846 		ASSERT(srcDes != NULL);			

   847 		aReadBuffer.Set(srcDes->Mid(aPosition, size));

   848 		iSrcDes.Set(aReadBuffer);		

   849 		}

   850 	else

   851 		{

   852 		

   853 		if(iImageParameterData.IsFilename())

   854 			{ // The source if a file

   855 			ASSERT(iData); // The file has to be open

   856 			if (iUseBufferReadOptimization)

   857                 {

   858 				srcSize = DataSizeL();

   859                 }

   860 			else

   861                 {

   862 				iData->DataSizeL(srcSize);

   863                 }

   864 			

   865 

   866 			srcIsFile = ETrue;

   867 			}

   868 		else

   869 			{ // The source is a descriptor

   870 			srcSize = iImageParameterData.SourceDataPtr()->Length();

   871 			srcIsFile = EFalse;

   872 			}

   873 

   874 		// if trying to start reading past end of file do nothing

   875 		if(aPosition >= srcSize)

   876 			{

   877 			aReadBuffer.Set(KNullDesC8);

   878 			return;

   879 			}

   880 

   881 		if((aPosition + size) > srcSize)

   882 			{

   883 			// there is not enough data left read what is left.

   884 			size = srcSize - aPosition;

   885 			}

   886 

   887 		TBool bufferedRead = srcIsFile || MustUseBufferWithDescriptor();

   888 

   889 		if(bufferedRead)

   890 			{

   891 			TBool allocNewBuf = EFalse;

   892          

   893 			// read source into local buffer

   894 			if(iReadBuffer == NULL)

   895 				{

   896 				iReadBuffer = HBufC8::NewMaxL(size);

   897 				allocNewBuf = ETrue;

   898 				}

   899 

   900 			TPtr8 ptr(iReadBuffer->Des());

   901 			//Grow iReadBuffer if necessary

   902 			if(ptr.MaxLength() < size)

   903 				{

   904 				delete iReadBuffer; iReadBuffer = NULL;

   905 				iReadBuffer = HBufC8::NewMaxL(size);

   906 				ptr.Set(iReadBuffer->Des());

   907 				allocNewBuf = ETrue;				     

   908 				}

   909 

   910 			if (srcIsFile)

   911 				{

   912                 if (iUseBufferReadOptimization)

   913                     {

   914                     // See if the end of the last read overlaps the start of the next read.

   915                     TInt extent = aPosition + size;

   916                     TBool overlaps =

   917                     // not newly-created buffer

   918                         ! allocNewBuf

   919                     // start position at or before start of last read

   920                         &&  iLastPos <= aPosition

   921                     // extent (end position) currently in buffer

   922                         &&  iLastExtent > aPosition && iLastExtent <= extent;

   923 	               

   924                     if (overlaps)

   925                         {

   926                         // copy the overlap portion to the start of the read buffer

   927                         TInt overlapOffset = aPosition - iLastPos;

   928                         TInt overlapAmount = iLastExtent - aPosition;

   929                         ptr.Copy(ptr.Mid(overlapOffset, overlapAmount));

   930                                    

   931                         // read the excess from the file

   932                         // expand ptr, else MidTPtr will only use the current data

   933                         // after the overlap amount for its maximum length

   934                         ptr.SetMax();

   935                         TPtr8 excess(ptr.MidTPtr(overlapAmount));

   936                         SeekReadL(aPosition + overlapAmount, excess, size - overlapAmount);

   937                                    

   938                         ptr.SetLength(overlapAmount + excess.Length());

   939                         }

   940 

   941                     else

   942                         {

   943                         SeekReadL(aPosition, ptr, size);

   944                         }

   945    

   946                     iLastPos = aPosition;

   947                     iLastExtent = extent;

   948                     }

   949                 else

   950                     {

   951                     User::LeaveIfError(iData->Seek(ESeekStart, aPosition));

   952                     User::LeaveIfError(iData->Read(ptr, size));

   953                     }

   954                 

   955 				}

   956 			else

   957 				{

   958 				ASSERT(!srcIsFile && MustUseBufferWithDescriptor());

   959 				const TDesC8* srcDes = iImageParameterData.SourceDataPtr();

   960 				ASSERT(srcDes != NULL);			

   961 				CopyBufferToDescriptor(ptr, *srcDes, aPosition, size); 

   962 				}

   963 			aReadBuffer.Set(iReadBuffer->Des());

   964 			}

   965 		else

   966 			{//Read block from descriptor

   967 			const TDesC8* srcDes = iImageParameterData.SourceDataPtr();

   968 			ASSERT(srcDes != NULL);			

   969 			aReadBuffer.Set(srcDes->Mid(aPosition, size));

   970 			}

   971 		iSrcDes.Set(aReadBuffer);

   972 		}

   973 	}

   974  

   975 void CImageDecoderPriv::HandleNewlyOpenedImageL()

   976 	{

   977 	// Tell the plugin that the user wants mask generation.

   978 	if (iOptions & CImageDecoder::EAllowGeneratedMask)

   979 		iPlugin->EnableMaskGeneration();

   980 

   981 	// call ScanDataL to read in the first header, at least.

   982 	TRAPD(error,iPlugin->ScanDataL());

   983 

   984 	// ignore underflow at this point only if the user has set the EOptionAllowZeroFrameOpen flag

   985 	if (error == KErrUnderflow)

   986 		if (iOptions & CImageDecoder::EOptionAllowZeroFrameOpen)

   987 			return;

   988 		else

   989 			User::Leave(error);

   990 		

   991 

   992 	if (error!=KErrNone) 

   993 		User::Leave(error);

   994 	}

   995 

   996 TUid CImageDecoderPriv::ImplementationUid() const

   997 	{

   998 	return iConstruct->ImplementationUid();

   999 	}

  1000 

  1001 /**

  1002  * Passes on CustomSyncL to plugin

  1003  *

  1004  */

  1005 

  1006 void CImageDecoderPriv::CustomSyncL(TInt aParam)

  1007 	{

  1008 	iPlugin->HandleCustomSyncL(aParam);

  1009 	}

  1010 

  1011 /**

  1012  * Plugin is interrogated with InitCustomAsyncL. If this works, then set internal Convert() cycle going

  1013  *

  1014  */

  1015 

  1016 void CImageDecoderPriv::CustomAsync(RThread& aRequestThread, TRequestStatus* aRequestStatus, TInt aParam)

  1017 	{

  1018 	__ASSERT_ALWAYS(!IsActive(), Panic(EConvertCalledWhileBusy));

  1019 

  1020 	TRAPD(error, iPlugin->InitCustomAsyncL(aParam));

  1021 

  1022 	iRequestThread = &aRequestThread;

  1023 	iConvStatus = aRequestStatus;

  1024 	*iConvStatus = KRequestPending;

  1025 

  1026 	if (error==KErrNone)

  1027 		SelfComplete(KErrNone);

  1028 	else

  1029 		RequestComplete(error);

  1030 	}

  1031 

  1032 /**

  1033  *  Indicate if running in a separate thread

  1034  * 

  1035  */

  1036 

  1037 TBool CImageDecoderPriv::AmInThread() const

  1038 	{

  1039 	return iSupport->AmInThread();

  1040 	}

  1041 

  1042 /**

  1043  *  Indicate if a decode should abort early (ie. following a Cancel). Always false unless in a thread.

  1044  * 

  1045  */

  1046 

  1047 TBool CImageDecoderPriv::ShouldAbort() const

  1048 	{

  1049 	return iSupport->ShouldAbort();

  1050 	}

  1051 

  1052 void CImageDecoderPriv::SetIntent(ContentAccess::TIntent aIntent)

  1053 	{

  1054 	iIntent = aIntent;

  1055 	}

  1056 

  1057 void CImageDecoderPriv::SetUniqueIdL(const TDesC& aUniqueId)

  1058 	{

  1059 	delete iUniqueId;

  1060 	iUniqueId = NULL;

  1061 	iUniqueId = aUniqueId.AllocL();

  1062 	}

  1063 

  1064 TInt CImageDecoderPriv::SetAgentProperty(ContentAccess::TAgentProperty aProperty, TInt aValue)

  1065 	{

  1066 	return iContent->SetProperty(aProperty, aValue);

  1067 	}

  1068 	

  1069 TInt CImageDecoderPriv::ReductionFactor(const TSize& aOriginalSize, const TSize& aReducedSize) const

  1070 	{

  1071 	return iImageReadCodec->ReductionFactor(aOriginalSize, aReducedSize);

  1072 	}

  1073 

  1074 TInt CImageDecoderPriv::ReducedSize(const TSize& aOriginalSize, TInt aReductionFactor, TSize& aReducedSize) const	

  1075 	{

  1076 	return iImageReadCodec->ReducedSize(aOriginalSize, aReductionFactor, aReducedSize);

  1077 	}

  1078 	

  1079 void CImageDecoderPriv::GetExtensionL(TUid aExtUid, MImageConvExtension*& aExtPtr)

  1080 	{

  1081 	iPlugin->GetExtensionL(aExtUid, aExtPtr);

  1082 	}

  1083 	

  1084 void CImageDecoderPriv::SetClippingRectL(const TRect* aClipRect)

  1085 	{

  1086 	iPlugin->SetClippingRectL(aClipRect);

  1087 	}

  1088 	

  1089 TInt CImageDecoderPriv::GetDestinationSize(TSize& aSize, TInt aFrameNumber)

  1090 	{

  1091 	return iPlugin->GetDestinationSize(aSize, aFrameNumber);

  1092 	}

  1093 

  1094 void CImageDecoderPriv::RegisterClientRequestStatus(RThread& aRequestThread, TRequestStatus* aRequestStatus)

  1095 	{

  1096 	__ASSERT_ALWAYS(!IsActive(), Panic(EFwExtensionBusy));

  1097 

  1098 	iRequestThread = &aRequestThread;

  1099 	iConvStatus = aRequestStatus;

  1100 	*iConvStatus = KRequestPending;

  1101 	}

  1102 	

  1103 void CImageDecoderPriv::StartActivity()

  1104 	{

  1105 	SetSelfPending();

  1106 	SelfComplete(KErrNone);

  1107 	}

  1108 

  1109 /* IMAGE ENCODER PRIVATE*/

  1110 CImageEncoderPriv* CImageEncoderPriv::NewL(CImageEncodeConstruct* aConstruct, MImageEncoderPrivSupport* aSupport)

  1111 	{

  1112 	CImageEncoderPriv* self = new (ELeave) CImageEncoderPriv(aConstruct, aSupport);

  1113 	return self;

  1114 	}

  1115 

  1116 void CImageEncoderPriv::SetFileL(RFs& aFs, const TDesC& aDestinationFilename, const CImageEncoder::TOptions aOptions)

  1117 	{

  1118 	iFs = &aFs;

  1119 	User::LeaveIfError(iFile.Replace(*iFs, aDestinationFilename, EFileWrite | EFileShareAny));

  1120 	iImageParameterData.SetFilenamePtr(&aDestinationFilename);

  1121 	iOptions = aOptions;

  1122 	

  1123 #if defined(SYMBIAN_ENABLE_ENCODER_ASYNC_WRITES)	

  1124 	ASSERT( iAsyncFileWriter == NULL );

  1125 	iAsyncFileWriter = CAsyncFileWriter::NewL(*this,iFile, KMaxDstBufferSize );

  1126 	iAsyncFileWriter->CheckBufferOut( iDstDes );

  1127 #endif // defined(SYMBIAN_ENABLE_ENCODER_ASYNC_WRITES)	

  1128 	}

  1129 

  1130 void CImageEncoderPriv::SetFileL(RFile& aFile, const CImageEncoder::TOptions aOptions)

  1131 	{

  1132 	User::LeaveIfError(iFile.Duplicate(aFile));

  1133 	TInt pos = 0;

  1134 	User::LeaveIfError(iFile.Seek(ESeekStart, pos));

  1135 	User::LeaveIfError(iFile.Name(iFileName));