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// Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include "TIFFFax.h"
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const TInt KMaxHuffmanCodeLength = 13;
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LOCAL_C inline TUint32 GetMostSignificantBits(TUint32 aBits,TInt aNumBits)
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{
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return(aBits>>(32-aNumBits));
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}
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// CTiffFax1dDecoder.
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CTiffFax1dDecoder::~CTiffFax1dDecoder()
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{
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delete []iRunData;
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delete iImageProcessor;
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}
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void CTiffFax1dDecoder::ConstructL(const TTiffImageData& aImageData)
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{
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iImageData = &aImageData;
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if((iImageData->iBitsPerSample>1) || (iImageData->iSamplesPerPixel>1))
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User::Leave(KErrNotSupported);
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if(iImageData->iFillOrder==2)
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iReverseBitsInByte = ETrue;
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// note officially should check for iImageData->iPhotometricInterpretation==EBlackIsZero
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// and reverse black, white interpretation, but some TIFF writers break this rule and other
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// readers ignore it
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iBlack = KRgbBlack;
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iWhite = KRgbWhite;
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iRowWidth = iImageData->iSizeInPixels.iWidth;
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iRowNumber = 0;
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iRunData = new (ELeave) TInt[iRowWidth+2];
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}
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void CTiffFax1dDecoder::DoNewFrameL(CFbsBitmap& aBitmap, TBool aDisableErrorDiffusion, TInt aReductionFactor)
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{
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delete iImageProcessor;
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iImageProcessor = NULL;
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iImageProcessor = ImageProcessorUtility::NewImageProcessorL(aBitmap, aReductionFactor, EGray2, aDisableErrorDiffusion);
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iImageProcessor->PrepareL(aBitmap,iImageData->iSizeInPixels);
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}
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void CTiffFax1dDecoder::NewStripL(TInt aNumBytes)
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{
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if(!aNumBytes)
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aNumBytes = KMaxTInt;
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iRowsRemaining = iImageData->iRowsPerStrip;
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TInt maxRows = iImageData->iSizeInPixels.iHeight-iRowNumber;
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if( (iRowsRemaining>maxRows) || (iRowsRemaining<=0) )
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iRowsRemaining = maxRows;
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iPixelsStoredInRow = 0;
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iBitCache = 0;
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iBitCacheLength = 0;
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iCodeType = ETiffFaxWhiteRun;
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CTiffFax1dDecoder::NewRow();
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}
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void CTiffFax1dDecoder::NewRow()
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{
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iColor = ETiffFaxWhiteRun;
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iRunDataIndex = 0;
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iRunData[0] = 0;
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}
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TBool CTiffFax1dDecoder::ProcessStripL(TBufPtr8* aSrc)
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{
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const TUint8* sourceBuffer = aSrc->Ptr();
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iSourcePtr = sourceBuffer;
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iSourcePtrLimit = iSourcePtr+aSrc->Length();
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UseBits(0);
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FOREVER
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{
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switch(ProcessNextCode())
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{
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case ETiffFaxUnderflow:
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aSrc->Shift(iSourcePtr-sourceBuffer);
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return(EFalse);
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case ETiffFaxInvalid:
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User::Leave(KErrCorrupt);
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case ETiffFaxEndOfLine:
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if(iPixelsStoredInRow==0)
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continue;
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if(iPixelsStoredInRow!=iRowWidth)
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User::Leave(KErrCorrupt);
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NewRow();
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iPixelsStoredInRow = 0;
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iRowNumber++;
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iRowsRemaining--;
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continue;
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case ETiffFaxPixelRun:
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if(!iCodeCount)
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continue;
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{
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TInt n = iPixelsStoredInRow+iCodeCount;
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if(n>iRowWidth)
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User::Leave(KErrCorrupt);
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if(iCodeType==ETiffFaxBlackRun)
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{
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iImageProcessor->SetMonoPixelRun(0,iCodeCount);
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if(!(iRunDataIndex&1))
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iRunDataIndex++;
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}
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else
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{
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iImageProcessor->SetMonoPixelRun(255,iCodeCount);
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if(iRunDataIndex&1)
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iRunDataIndex++;
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}
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iPixelsStoredInRow = n;
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iRunData[iRunDataIndex] = n;
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if((n!=iRowWidth) || (iRowsRemaining!=1)) // Continue if not last pixel of image
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continue;
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}
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// else drop through....
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case ETiffFaxEndOfFax:
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iImageProcessor->FlushPixels();
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return(ETrue);
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}
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}
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}
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LOCAL_D const TUint8 KByteFlip[256] =
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{
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0x00,0x80,0x40,0xc0,0x20,0xa0,0x60,0xe0,0x10,0x90,0x50,0xd0,0x30,0xb0,0x70,0xf0,
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0x08,0x88,0x48,0xc8,0x28,0xa8,0x68,0xe8,0x18,0x98,0x58,0xd8,0x38,0xb8,0x78,0xf8,
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0x04,0x84,0x44,0xc4,0x24,0xa4,0x64,0xe4,0x14,0x94,0x54,0xd4,0x34,0xb4,0x74,0xf4,
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0x0c,0x8c,0x4c,0xcc,0x2c,0xac,0x6c,0xec,0x1c,0x9c,0x5c,0xdc,0x3c,0xbc,0x7c,0xfc,
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0x02,0x82,0x42,0xc2,0x22,0xa2,0x62,0xe2,0x12,0x92,0x52,0xd2,0x32,0xb2,0x72,0xf2,
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0x0a,0x8a,0x4a,0xca,0x2a,0xaa,0x6a,0xea,0x1a,0x9a,0x5a,0xda,0x3a,0xba,0x7a,0xfa,
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0x06,0x86,0x46,0xc6,0x26,0xa6,0x66,0xe6,0x16,0x96,0x56,0xd6,0x36,0xb6,0x76,0xf6,
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0x0e,0x8e,0x4e,0xce,0x2e,0xae,0x6e,0xee,0x1e,0x9e,0x5e,0xde,0x3e,0xbe,0x7e,0xfe,
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0x01,0x81,0x41,0xc1,0x21,0xa1,0x61,0xe1,0x11,0x91,0x51,0xd1,0x31,0xb1,0x71,0xf1,
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0x09,0x89,0x49,0xc9,0x29,0xa9,0x69,0xe9,0x19,0x99,0x59,0xd9,0x39,0xb9,0x79,0xf9,
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0x05,0x85,0x45,0xc5,0x25,0xa5,0x65,0xe5,0x15,0x95,0x55,0xd5,0x35,0xb5,0x75,0xf5,
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0x0d,0x8d,0x4d,0xcd,0x2d,0xad,0x6d,0xed,0x1d,0x9d,0x5d,0xdd,0x3d,0xbd,0x7d,0xfd,
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0x03,0x83,0x43,0xc3,0x23,0xa3,0x63,0xe3,0x13,0x93,0x53,0xd3,0x33,0xb3,0x73,0xf3,
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0x0b,0x8b,0x4b,0xcb,0x2b,0xab,0x6b,0xeb,0x1b,0x9b,0x5b,0xdb,0x3b,0xbb,0x7b,0xfb,
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0x07,0x87,0x47,0xc7,0x27,0xa7,0x67,0xe7,0x17,0x97,0x57,0xd7,0x37,0xb7,0x77,0xf7,
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0x0f,0x8f,0x4f,0xcf,0x2f,0xaf,0x6f,0xef,0x1f,0x9f,0x5f,0xdf,0x3f,0xbf,0x7f,0xff
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};
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void CTiffFax1dDecoder::UseBits(TInt aNumBits)
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{
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ASSERT(aNumBits<=iBitCacheLength);
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TInt validBits = iBitCacheLength-aNumBits;
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TUint32 bits = iBitCache<<aNumBits;
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if(validBits>=KMaxHuffmanCodeLength)
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{
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iBitCache = bits;
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iBitCacheLength = validBits;
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return;
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}
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TInt shift = 32-validBits;
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const TUint8* ptr = iSourcePtr;
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TInt numBytes = shift>>3;
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TInt maxBytes = iSourcePtrLimit-ptr;
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if(numBytes>maxBytes)
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numBytes = maxBytes;
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iBitCacheLength = validBits+numBytes*8;
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const TUint8* ptrLimit = ptr+numBytes;
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if(iReverseBitsInByte)
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{
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while(ptr<ptrLimit)
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{
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TInt byte = *(ptr++);
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byte = KByteFlip[byte]; // reverse bits within byte
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shift -= 8;
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bits |= byte<<shift;
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}
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}
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else
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{
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while(ptr<ptrLimit)
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{
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TInt byte = *(ptr++);
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shift -= 8;
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bits |= byte<<shift;
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}
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}
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iBitCache = bits;
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iSourcePtr = ptr;
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return;
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}
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TTiffFaxState CTiffFax1dDecoder::Decode1d()
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{
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if(iBitCache&0xff000000)
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{
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if(iColor==ETiffFaxWhiteRun)
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return(DecodeWhite());
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else
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return(DecodeBlack());
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}
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else
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return(DecodeEndOfLine());
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}
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#define HUFFMAN_DECODE_ENTRY(aCount,aNumBits) (aCount<<4)+aNumBits
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LOCAL_D const TUint16 White0000[16] =
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{
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HUFFMAN_DECODE_ENTRY(0 ,0),
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HUFFMAN_DECODE_ENTRY(0 ,0),
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HUFFMAN_DECODE_ENTRY(29 ,8),
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HUFFMAN_DECODE_ENTRY(30 ,8),
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HUFFMAN_DECODE_ENTRY(45 ,8),
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HUFFMAN_DECODE_ENTRY(46 ,8),
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HUFFMAN_DECODE_ENTRY(22 ,7),
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HUFFMAN_DECODE_ENTRY(22 ,7),
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HUFFMAN_DECODE_ENTRY(23 ,7),
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HUFFMAN_DECODE_ENTRY(23 ,7),
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HUFFMAN_DECODE_ENTRY(47 ,8),
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HUFFMAN_DECODE_ENTRY(48 ,8),
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HUFFMAN_DECODE_ENTRY(13 ,6),
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HUFFMAN_DECODE_ENTRY(13 ,6),
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HUFFMAN_DECODE_ENTRY(13 ,6),
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HUFFMAN_DECODE_ENTRY(13 ,6)
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};
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LOCAL_D const TUint16 White0001[16] =
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{
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HUFFMAN_DECODE_ENTRY(20 ,7),
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HUFFMAN_DECODE_ENTRY(20 ,7),
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HUFFMAN_DECODE_ENTRY(33 ,8),
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HUFFMAN_DECODE_ENTRY(34 ,8),
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HUFFMAN_DECODE_ENTRY(35 ,8),
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HUFFMAN_DECODE_ENTRY(36 ,8),
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HUFFMAN_DECODE_ENTRY(37 ,8),
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HUFFMAN_DECODE_ENTRY(38 ,8),
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HUFFMAN_DECODE_ENTRY(19 ,7),
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HUFFMAN_DECODE_ENTRY(19 ,7),
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HUFFMAN_DECODE_ENTRY(31 ,8),
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HUFFMAN_DECODE_ENTRY(32 ,8),
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HUFFMAN_DECODE_ENTRY(1 ,6),
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HUFFMAN_DECODE_ENTRY(1 ,6),
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HUFFMAN_DECODE_ENTRY(1 ,6),
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HUFFMAN_DECODE_ENTRY(1 ,6)
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};
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LOCAL_D const TUint16 White0010[16] =
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{
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HUFFMAN_DECODE_ENTRY(12 ,6),
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HUFFMAN_DECODE_ENTRY(12 ,6),
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HUFFMAN_DECODE_ENTRY(12 ,6),
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HUFFMAN_DECODE_ENTRY(12 ,6),
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HUFFMAN_DECODE_ENTRY(53 ,8),
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HUFFMAN_DECODE_ENTRY(54 ,8),
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HUFFMAN_DECODE_ENTRY(26 ,7),
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HUFFMAN_DECODE_ENTRY(26 ,7),
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HUFFMAN_DECODE_ENTRY(39 ,8),
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HUFFMAN_DECODE_ENTRY(40 ,8),
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HUFFMAN_DECODE_ENTRY(41 ,8),
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HUFFMAN_DECODE_ENTRY(42 ,8),
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HUFFMAN_DECODE_ENTRY(43 ,8),
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HUFFMAN_DECODE_ENTRY(44 ,8),
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HUFFMAN_DECODE_ENTRY(21 ,7),
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HUFFMAN_DECODE_ENTRY(21 ,7)
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};
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LOCAL_D const TUint16 White0011[16] =
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{
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HUFFMAN_DECODE_ENTRY(28 ,7),
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HUFFMAN_DECODE_ENTRY(28 ,7),
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HUFFMAN_DECODE_ENTRY(61 ,8),
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HUFFMAN_DECODE_ENTRY(62 ,8),
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HUFFMAN_DECODE_ENTRY(63 ,8),
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HUFFMAN_DECODE_ENTRY(0 ,8),
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HUFFMAN_DECODE_ENTRY(320 ,8),
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HUFFMAN_DECODE_ENTRY(384 ,8),
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HUFFMAN_DECODE_ENTRY(10 ,5),
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HUFFMAN_DECODE_ENTRY(10 ,5),
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HUFFMAN_DECODE_ENTRY(10 ,5),
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HUFFMAN_DECODE_ENTRY(10 ,5),
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328 |
HUFFMAN_DECODE_ENTRY(10 ,5),
|
|
|
329 |
HUFFMAN_DECODE_ENTRY(10 ,5),
|
|
|
330 |
HUFFMAN_DECODE_ENTRY(10 ,5),
|
|
|
331 |
HUFFMAN_DECODE_ENTRY(10 ,5)
|
|
|
332 |
};
|
|
|
333 |
|
|
|
334 |
LOCAL_D const TUint16 White0100[32] =
|
|
|
335 |
{
|
|
|
336 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
337 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
338 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
339 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
340 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
341 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
342 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
343 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
344 |
|
|
|
345 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
346 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
347 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
348 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
349 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
350 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
351 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
352 |
HUFFMAN_DECODE_ENTRY(11 ,5),
|
|
|
353 |
|
|
|
354 |
HUFFMAN_DECODE_ENTRY(27 ,7),
|
|
|
355 |
HUFFMAN_DECODE_ENTRY(27 ,7),
|
|
|
356 |
HUFFMAN_DECODE_ENTRY(27 ,7),
|
|
|
357 |
HUFFMAN_DECODE_ENTRY(27 ,7),
|
|
|
358 |
HUFFMAN_DECODE_ENTRY(59 ,8),
|
|
|
359 |
HUFFMAN_DECODE_ENTRY(59 ,8),
|
|
|
360 |
HUFFMAN_DECODE_ENTRY(60 ,8),
|
|
|
361 |
HUFFMAN_DECODE_ENTRY(60 ,8),
|
|
|
362 |
|
|
|
363 |
HUFFMAN_DECODE_ENTRY(1472 ,9),
|
|
|
364 |
HUFFMAN_DECODE_ENTRY(1536 ,9),
|
|
|
365 |
HUFFMAN_DECODE_ENTRY(1600 ,9),
|
|
|
366 |
HUFFMAN_DECODE_ENTRY(1728 ,9),
|
|
|
367 |
HUFFMAN_DECODE_ENTRY(18 ,7),
|
|
|
368 |
HUFFMAN_DECODE_ENTRY(18 ,7),
|
|
|
369 |
HUFFMAN_DECODE_ENTRY(18 ,7),
|
|
|
370 |
HUFFMAN_DECODE_ENTRY(18 ,7)
|
|
|
371 |
};
|
|
|
372 |
|
|
|
373 |
LOCAL_D const TUint16 White0101[16] =
|
|
|
374 |
{
|
|
|
375 |
HUFFMAN_DECODE_ENTRY(24 ,7),
|
|
|
376 |
HUFFMAN_DECODE_ENTRY(24 ,7),
|
|
|
377 |
HUFFMAN_DECODE_ENTRY(49 ,8),
|
|
|
378 |
HUFFMAN_DECODE_ENTRY(50 ,8),
|
|
|
379 |
HUFFMAN_DECODE_ENTRY(51 ,8),
|
|
|
380 |
HUFFMAN_DECODE_ENTRY(52 ,8),
|
|
|
381 |
HUFFMAN_DECODE_ENTRY(25 ,7),
|
|
|
382 |
HUFFMAN_DECODE_ENTRY(25 ,7),
|
|
|
383 |
|
|
|
384 |
HUFFMAN_DECODE_ENTRY(55 ,8),
|
|
|
385 |
HUFFMAN_DECODE_ENTRY(56 ,8),
|
|
|
386 |
HUFFMAN_DECODE_ENTRY(57 ,8),
|
|
|
387 |
HUFFMAN_DECODE_ENTRY(58 ,8),
|
|
|
388 |
HUFFMAN_DECODE_ENTRY(192 ,6),
|
|
|
389 |
HUFFMAN_DECODE_ENTRY(192 ,6),
|
|
|
390 |
HUFFMAN_DECODE_ENTRY(192 ,6),
|
|
|
391 |
HUFFMAN_DECODE_ENTRY(192 ,6)
|
|
|
392 |
};
|
|
|
393 |
|
|
|
394 |
LOCAL_D const TUint16 White0110[32] =
|
|
|
395 |
{
|
|
|
396 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
397 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
398 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
399 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
400 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
401 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
402 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
403 |
HUFFMAN_DECODE_ENTRY(1664 ,6),
|
|
|
404 |
|
|
|
405 |
HUFFMAN_DECODE_ENTRY(448 ,8),
|
|
|
406 |
HUFFMAN_DECODE_ENTRY(448 ,8),
|
|
|
407 |
HUFFMAN_DECODE_ENTRY(512 ,8),
|
|
|
408 |
HUFFMAN_DECODE_ENTRY(512 ,8),
|
|
|
409 |
HUFFMAN_DECODE_ENTRY(704 ,9),
|
|
|
410 |
HUFFMAN_DECODE_ENTRY(768 ,9),
|
|
|
411 |
HUFFMAN_DECODE_ENTRY(640 ,8),
|
|
|
412 |
HUFFMAN_DECODE_ENTRY(640 ,8),
|
|
|
413 |
|
|
|
414 |
HUFFMAN_DECODE_ENTRY(576 ,8),
|
|
|
415 |
HUFFMAN_DECODE_ENTRY(576 ,8),
|
|
|
416 |
HUFFMAN_DECODE_ENTRY(832 ,9),
|
|
|
417 |
HUFFMAN_DECODE_ENTRY(896 ,9),
|
|
|
418 |
HUFFMAN_DECODE_ENTRY(960 ,9),
|
|
|
419 |
HUFFMAN_DECODE_ENTRY(1024 ,9),
|
|
|
420 |
HUFFMAN_DECODE_ENTRY(1088 ,9),
|
|
|
421 |
HUFFMAN_DECODE_ENTRY(1152 ,9),
|
|
|
422 |
|
|
|
423 |
HUFFMAN_DECODE_ENTRY(1216 ,9),
|
|
|
424 |
HUFFMAN_DECODE_ENTRY(1280 ,9),
|
|
|
425 |
HUFFMAN_DECODE_ENTRY(1344 ,9),
|
|
|
426 |
HUFFMAN_DECODE_ENTRY(1408 ,9),
|
|
|
427 |
HUFFMAN_DECODE_ENTRY(256 ,7),
|
|
|
428 |
HUFFMAN_DECODE_ENTRY(256 ,7),
|
|
|
429 |
HUFFMAN_DECODE_ENTRY(256 ,7),
|
|
|
430 |
HUFFMAN_DECODE_ENTRY(256 ,7)
|
|
|
431 |
};
|
|
|
432 |
|
|
|
433 |
LOCAL_D const TUint16 White0111[1] =
|
|
|
434 |
{
|
|
|
435 |
HUFFMAN_DECODE_ENTRY(2 ,4)
|
|
|
436 |
};
|
|
|
437 |
|
|
|
438 |
LOCAL_D const TUint16 White1000[1] =
|
|
|
439 |
{
|
|
|
440 |
HUFFMAN_DECODE_ENTRY(3 ,4)
|
|
|
441 |
};
|
|
|
442 |
|
|
|
443 |
LOCAL_D const TUint16 White1001[2] =
|
|
|
444 |
{
|
|
|
445 |
HUFFMAN_DECODE_ENTRY(128 ,5),
|
|
|
446 |
HUFFMAN_DECODE_ENTRY(8 ,5)
|
|
|
447 |
};
|
|
|
448 |
|
|
|
449 |
LOCAL_D const TUint16 White1010[4] =
|
|
|
450 |
{
|
|
|
451 |
HUFFMAN_DECODE_ENTRY(9 ,5),
|
|
|
452 |
HUFFMAN_DECODE_ENTRY(9 ,5),
|
|
|
453 |
HUFFMAN_DECODE_ENTRY(16 ,6),
|
|
|
454 |
HUFFMAN_DECODE_ENTRY(17 ,6)
|
|
|
455 |
};
|
|
|
456 |
|
|
|
457 |
LOCAL_D const TUint16 White1011[1] =
|
|
|
458 |
{
|
|
|
459 |
HUFFMAN_DECODE_ENTRY(4 ,4)
|
|
|
460 |
};
|
|
|
461 |
|
|
|
462 |
LOCAL_D const TUint16 White1100[1] =
|
|
|
463 |
{
|
|
|
464 |
HUFFMAN_DECODE_ENTRY(5 ,4)
|
|
|
465 |
};
|
|
|
466 |
|
|
|
467 |
LOCAL_D const TUint16 White1101[4] =
|
|
|
468 |
{
|
|
|
469 |
HUFFMAN_DECODE_ENTRY(14 ,6),
|
|
|
470 |
HUFFMAN_DECODE_ENTRY(15 ,6),
|
|
|
471 |
HUFFMAN_DECODE_ENTRY(64 ,5),
|
|
|
472 |
HUFFMAN_DECODE_ENTRY(64 ,5)
|
|
|
473 |
};
|
|
|
474 |
|
|
|
475 |
LOCAL_D const TUint16 White1110[1] =
|
|
|
476 |
{
|
|
|
477 |
HUFFMAN_DECODE_ENTRY(6 ,4)
|
|
|
478 |
};
|
|
|
479 |
|
|
|
480 |
LOCAL_D const TUint16 White1111[1] =
|
|
|
481 |
{
|
|
|
482 |
HUFFMAN_DECODE_ENTRY(7 ,4)
|
|
|
483 |
};
|
|
|
484 |
|
|
|
485 |
LOCAL_D const TUint16 Black0001[4] =
|
|
|
486 |
{
|
|
|
487 |
HUFFMAN_DECODE_ENTRY(9 ,6),
|
|
|
488 |
HUFFMAN_DECODE_ENTRY(8 ,6),
|
|
|
489 |
HUFFMAN_DECODE_ENTRY(7 ,5),
|
|
|
490 |
HUFFMAN_DECODE_ENTRY(7 ,5)
|
|
|
491 |
};
|
|
|
492 |
|
|
|
493 |
LOCAL_D const TUint16 Black0010[1] =
|
|
|
494 |
{
|
|
|
495 |
HUFFMAN_DECODE_ENTRY(6 ,4)
|
|
|
496 |
};
|
|
|
497 |
|
|
|
498 |
LOCAL_D const TUint16 Black0011[1] =
|
|
|
499 |
{
|
|
|
500 |
HUFFMAN_DECODE_ENTRY(5 ,4)
|
|
|
501 |
};
|
|
|
502 |
|
|
|
503 |
LOCAL_D const TUint16 Black010x[1] =
|
|
|
504 |
{
|
|
|
505 |
HUFFMAN_DECODE_ENTRY(1 ,3)
|
|
|
506 |
};
|
|
|
507 |
|
|
|
508 |
LOCAL_D const TUint16 Black011x[1] =
|
|
|
509 |
{
|
|
|
510 |
HUFFMAN_DECODE_ENTRY(4 ,3)
|
|
|
511 |
};
|
|
|
512 |
|
|
|
513 |
LOCAL_D const TUint16 Black10xx[1] =
|
|
|
514 |
{
|
|
|
515 |
HUFFMAN_DECODE_ENTRY(3 ,2)
|
|
|
516 |
};
|
|
|
517 |
|
|
|
518 |
LOCAL_D const TUint16 Black11xx[1] =
|
|
|
519 |
{
|
|
|
520 |
HUFFMAN_DECODE_ENTRY(2 ,2)
|
|
|
521 |
};
|
|
|
522 |
|
|
|
523 |
LOCAL_D const TUint16 Black0000_0010[32] =
|
|
|
524 |
{
|
|
|
525 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
526 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
527 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
528 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
529 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
530 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
531 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
532 |
HUFFMAN_DECODE_ENTRY(18 ,10),
|
|
|
533 |
|
|
|
534 |
HUFFMAN_DECODE_ENTRY(52 ,12),
|
|
|
535 |
HUFFMAN_DECODE_ENTRY(52 ,12),
|
|
|
536 |
HUFFMAN_DECODE_ENTRY(640 ,13),
|
|
|
537 |
HUFFMAN_DECODE_ENTRY(704 ,13),
|
|
|
538 |
HUFFMAN_DECODE_ENTRY(768 ,13),
|
|
|
539 |
HUFFMAN_DECODE_ENTRY(832 ,13),
|
|
|
540 |
HUFFMAN_DECODE_ENTRY(55 ,12),
|
|
|
541 |
HUFFMAN_DECODE_ENTRY(55 ,12),
|
|
|
542 |
|
|
|
543 |
HUFFMAN_DECODE_ENTRY(56 ,12),
|
|
|
544 |
HUFFMAN_DECODE_ENTRY(56 ,12),
|
|
|
545 |
HUFFMAN_DECODE_ENTRY(1280 ,13),
|
|
|
546 |
HUFFMAN_DECODE_ENTRY(1344 ,13),
|
|
|
547 |
HUFFMAN_DECODE_ENTRY(1408 ,13),
|
|
|
548 |
HUFFMAN_DECODE_ENTRY(1472 ,13),
|
|
|
549 |
HUFFMAN_DECODE_ENTRY(59 ,12),
|
|
|
550 |
HUFFMAN_DECODE_ENTRY(59 ,12),
|
|
|
551 |
|
|
|
552 |
HUFFMAN_DECODE_ENTRY(60 ,12),
|
|
|
553 |
HUFFMAN_DECODE_ENTRY(60 ,12),
|
|
|
554 |
HUFFMAN_DECODE_ENTRY(1536 ,13),
|
|
|
555 |
HUFFMAN_DECODE_ENTRY(1600 ,13),
|
|
|
556 |
HUFFMAN_DECODE_ENTRY(24 ,11),
|
|
|
557 |
HUFFMAN_DECODE_ENTRY(24 ,11),
|
|
|
558 |
HUFFMAN_DECODE_ENTRY(24 ,11),
|
|
|
559 |
HUFFMAN_DECODE_ENTRY(24 ,11)
|
|
|
560 |
};
|
|
|
561 |
|
|
|
562 |
LOCAL_D const TUint16 Black0000_0011[32] =
|
|
|
563 |
{
|
|
|
564 |
HUFFMAN_DECODE_ENTRY(25 ,11),
|
|
|
565 |
HUFFMAN_DECODE_ENTRY(25 ,11),
|
|
|
566 |
HUFFMAN_DECODE_ENTRY(25 ,11),
|
|
|
567 |
HUFFMAN_DECODE_ENTRY(25 ,11),
|
|
|
568 |
HUFFMAN_DECODE_ENTRY(1664 ,13),
|
|
|
569 |
HUFFMAN_DECODE_ENTRY(1728 ,13),
|
|
|
570 |
HUFFMAN_DECODE_ENTRY(320 ,12),
|
|
|
571 |
HUFFMAN_DECODE_ENTRY(320 ,12),
|
|
|
572 |
|
|
|
573 |
HUFFMAN_DECODE_ENTRY(384 ,12),
|
|
|
574 |
HUFFMAN_DECODE_ENTRY(384 ,12),
|
|
|
575 |
HUFFMAN_DECODE_ENTRY(448 ,12),
|
|
|
576 |
HUFFMAN_DECODE_ENTRY(448 ,12),
|
|
|
577 |
HUFFMAN_DECODE_ENTRY(512 ,13),
|
|
|
578 |
HUFFMAN_DECODE_ENTRY(576 ,13),
|
|
|
579 |
HUFFMAN_DECODE_ENTRY(53 ,12),
|
|
|
580 |
HUFFMAN_DECODE_ENTRY(53 ,12),
|
|
|
581 |
|
|
|
582 |
HUFFMAN_DECODE_ENTRY(54 ,12),
|
|
|
583 |
HUFFMAN_DECODE_ENTRY(54 ,12),
|
|
|
584 |
HUFFMAN_DECODE_ENTRY(896 ,13),
|
|
|
585 |
HUFFMAN_DECODE_ENTRY(960 ,13),
|
|
|
586 |
HUFFMAN_DECODE_ENTRY(1024 ,13),
|
|
|
587 |
HUFFMAN_DECODE_ENTRY(1088 ,13),
|
|
|
588 |
HUFFMAN_DECODE_ENTRY(1152 ,13),
|
|
|
589 |
HUFFMAN_DECODE_ENTRY(1216 ,13),
|
|
|
590 |
|
|
|
591 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
592 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
593 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
594 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
595 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
596 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
597 |
HUFFMAN_DECODE_ENTRY(64 ,10),
|
|
|
598 |
HUFFMAN_DECODE_ENTRY(64 ,10)
|
|
|
599 |
};
|
|
|
600 |
|
|
|
601 |
LOCAL_D const TUint16 Black0000_0100[1] =
|
|
|
602 |
{
|
|
|
603 |
HUFFMAN_DECODE_ENTRY(13 ,8)
|
|
|
604 |
};
|
|
|
605 |
|
|
|
606 |
LOCAL_D const TUint16 Black0000_0101[16] =
|
|
|
607 |
{
|
|
|
608 |
HUFFMAN_DECODE_ENTRY(23 ,11),
|
|
|
609 |
HUFFMAN_DECODE_ENTRY(23 ,11),
|
|
|
610 |
HUFFMAN_DECODE_ENTRY(50 ,12),
|
|
|
611 |
HUFFMAN_DECODE_ENTRY(51 ,12),
|
|
|
612 |
HUFFMAN_DECODE_ENTRY(44 ,12),
|
|
|
613 |
HUFFMAN_DECODE_ENTRY(45 ,12),
|
|
|
614 |
HUFFMAN_DECODE_ENTRY(46 ,12),
|
|
|
615 |
HUFFMAN_DECODE_ENTRY(47 ,12),
|
|
|
616 |
|
|
|
617 |
HUFFMAN_DECODE_ENTRY(57 ,12),
|
|
|
618 |
HUFFMAN_DECODE_ENTRY(58 ,12),
|
|
|
619 |
HUFFMAN_DECODE_ENTRY(61 ,12),
|
|
|
620 |
HUFFMAN_DECODE_ENTRY(256 ,12),
|
|
|
621 |
HUFFMAN_DECODE_ENTRY(16 ,10),
|
|
|
622 |
HUFFMAN_DECODE_ENTRY(16 ,10),
|
|
|
623 |
HUFFMAN_DECODE_ENTRY(16 ,10),
|
|
|
624 |
HUFFMAN_DECODE_ENTRY(16 ,10)
|
|
|
625 |
};
|
|
|
626 |
|
|
|
627 |
LOCAL_D const TUint16 Black0000_0110[16] =
|
|
|
628 |
{
|
|
|
629 |
HUFFMAN_DECODE_ENTRY(17 ,10),
|
|
|
630 |
HUFFMAN_DECODE_ENTRY(17 ,10),
|
|
|
631 |
HUFFMAN_DECODE_ENTRY(17 ,10),
|
|
|
632 |
HUFFMAN_DECODE_ENTRY(17 ,10),
|
|
|
633 |
HUFFMAN_DECODE_ENTRY(48 ,12),
|
|
|
634 |
HUFFMAN_DECODE_ENTRY(49 ,12),
|
|
|
635 |
HUFFMAN_DECODE_ENTRY(62 ,12),
|
|
|
636 |
HUFFMAN_DECODE_ENTRY(63 ,12),
|
|
|
637 |
|
|
|
638 |
HUFFMAN_DECODE_ENTRY(30 ,12),
|
|
|
639 |
HUFFMAN_DECODE_ENTRY(31 ,12),
|
|
|
640 |
HUFFMAN_DECODE_ENTRY(32 ,12),
|
|
|
641 |
HUFFMAN_DECODE_ENTRY(33 ,12),
|
|
|
642 |
HUFFMAN_DECODE_ENTRY(40 ,12),
|
|
|
643 |
HUFFMAN_DECODE_ENTRY(41 ,12),
|
|
|
644 |
HUFFMAN_DECODE_ENTRY(22 ,11),
|
|
|
645 |
HUFFMAN_DECODE_ENTRY(22 ,11)
|
|
|
646 |
};
|
|
|
647 |
|
|
|
648 |
LOCAL_D const TUint16 Black0000_0111[1] =
|
|
|
649 |
{
|
|
|
650 |
HUFFMAN_DECODE_ENTRY(14 ,8)
|
|
|
651 |
};
|
|
|
652 |
|
|
|
653 |
LOCAL_D const TUint16 Black0000_100x[1] =
|
|
|
654 |
{
|
|
|
655 |
HUFFMAN_DECODE_ENTRY(10 ,7)
|
|
|
656 |
};
|
|
|
657 |
|
|
|
658 |
LOCAL_D const TUint16 Black0000_101x[1] =
|
|
|
659 |
{
|
|
|
660 |
HUFFMAN_DECODE_ENTRY(11 ,7)
|
|
|
661 |
};
|
|
|
662 |
|
|
|
663 |
LOCAL_D const TUint16 Black0000_1100[16] =
|
|
|
664 |
{
|
|
|
665 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
666 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
667 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
668 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
669 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
670 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
671 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
672 |
HUFFMAN_DECODE_ENTRY(15 ,9),
|
|
|
673 |
|
|
|
674 |
HUFFMAN_DECODE_ENTRY(128 ,12),
|
|
|
675 |
HUFFMAN_DECODE_ENTRY(192 ,12),
|
|
|
676 |
HUFFMAN_DECODE_ENTRY(26 ,12),
|
|
|
677 |
HUFFMAN_DECODE_ENTRY(27 ,12),
|
|
|
678 |
HUFFMAN_DECODE_ENTRY(28 ,12),
|
|
|
679 |
HUFFMAN_DECODE_ENTRY(29 ,12),
|
|
|
680 |
HUFFMAN_DECODE_ENTRY(19 ,11),
|
|
|
681 |
HUFFMAN_DECODE_ENTRY(19 ,11)
|
|
|
682 |
};
|
|
|
683 |
|
|
|
684 |
LOCAL_D const TUint16 Black0000_1101[16] =
|
|
|
685 |
{
|
|
|
686 |
HUFFMAN_DECODE_ENTRY(20 ,11),
|
|
|
687 |
HUFFMAN_DECODE_ENTRY(20 ,11),
|
|
|
688 |
HUFFMAN_DECODE_ENTRY(34 ,12),
|
|
|
689 |
HUFFMAN_DECODE_ENTRY(35 ,12),
|
|
|
690 |
HUFFMAN_DECODE_ENTRY(36 ,12),
|
|
|
691 |
HUFFMAN_DECODE_ENTRY(37 ,12),
|
|
|
692 |
HUFFMAN_DECODE_ENTRY(38 ,12),
|
|
|
693 |
HUFFMAN_DECODE_ENTRY(39 ,12),
|
|
|
694 |
|
|
|
695 |
HUFFMAN_DECODE_ENTRY(21 ,11),
|
|
|
696 |
HUFFMAN_DECODE_ENTRY(21 ,11),
|
|
|
697 |
HUFFMAN_DECODE_ENTRY(42 ,12),
|
|
|
698 |
HUFFMAN_DECODE_ENTRY(43 ,12),
|
|
|
699 |
HUFFMAN_DECODE_ENTRY(0 ,10),
|
|
|
700 |
HUFFMAN_DECODE_ENTRY(0 ,10),
|
|
|
701 |
HUFFMAN_DECODE_ENTRY(0 ,10),
|
|
|
702 |
HUFFMAN_DECODE_ENTRY(0 ,10)
|
|
|
703 |
};
|
|
|
704 |
|
|
|
705 |
LOCAL_D const TUint16 Black0000_111x[1] =
|
|
|
706 |
{
|
|
|
707 |
HUFFMAN_DECODE_ENTRY(12 ,7)
|
|
|
708 |
};
|
|
|
709 |
|
|
|
710 |
LOCAL_D const TUint16 Common0000_0001[16] =
|
|
|
711 |
{
|
|
|
712 |
HUFFMAN_DECODE_ENTRY(1792 ,11),
|
|
|
713 |
HUFFMAN_DECODE_ENTRY(1792 ,11),
|
|
|
714 |
HUFFMAN_DECODE_ENTRY(1984 ,12),
|
|
|
715 |
HUFFMAN_DECODE_ENTRY(2048 ,12),
|
|
|
716 |
HUFFMAN_DECODE_ENTRY(2112 ,12),
|
|
|
717 |
HUFFMAN_DECODE_ENTRY(2176 ,12),
|
|
|
718 |
HUFFMAN_DECODE_ENTRY(2240 ,12),
|
|
|
719 |
HUFFMAN_DECODE_ENTRY(2304 ,12),
|
|
|
720 |
HUFFMAN_DECODE_ENTRY(1856 ,11),
|
|
|
721 |
HUFFMAN_DECODE_ENTRY(1856 ,11),
|
|
|
722 |
HUFFMAN_DECODE_ENTRY(1920 ,11),
|
|
|
723 |
HUFFMAN_DECODE_ENTRY(1920 ,11),
|
|
|
724 |
HUFFMAN_DECODE_ENTRY(2368 ,12),
|
|
|
725 |
HUFFMAN_DECODE_ENTRY(2432 ,12),
|
|
|
726 |
HUFFMAN_DECODE_ENTRY(2496 ,12),
|
|
|
727 |
HUFFMAN_DECODE_ENTRY(2560 ,12)
|
|
|
728 |
};
|
|
|
729 |
|
|
|
730 |
class THuffmanTable
|
|
|
731 |
{
|
|
|
732 |
public:
|
|
|
733 |
const TUint16* iCodes;
|
|
|
734 |
TInt iIndexBits; // Number of bits to use for indexing into iCodes
|
|
|
735 |
};
|
|
|
736 |
|
|
|
737 |
LOCAL_D const THuffmanTable WhiteTables[32] =
|
|
|
738 |
{
|
|
|
739 |
{White0000,4},
|
|
|
740 |
{White0001,4},
|
|
|
741 |
{White0010,4},
|
|
|
742 |
{White0011,4},
|
|
|
743 |
{White0100,5},
|
|
|
744 |
{White0101,4},
|
|
|
745 |
{White0110,5},
|
|
|
746 |
{White0111,0},
|
|
|
747 |
{White1000,0},
|
|
|
748 |
{White1001,1},
|
|
|
749 |
{White1010,2},
|
|
|
750 |
{White1011,0},
|
|
|
751 |
{White1100,0},
|
|
|
752 |
{White1101,2},
|
|
|
753 |
{White1110,0},
|
|
|
754 |
{White1111,0},
|
|
|
755 |
};
|
|
|
756 |
|
|
|
757 |
LOCAL_D const THuffmanTable BlackTables[16] =
|
|
|
758 |
{
|
|
|
759 |
{NULL,0},
|
|
|
760 |
{Black0001,2},
|
|
|
761 |
{Black0010,0},
|
|
|
762 |
{Black0011,0},
|
|
|
763 |
{Black010x,0},
|
|
|
764 |
{Black010x,0},
|
|
|
765 |
{Black011x,0},
|
|
|
766 |
{Black011x,0},
|
|
|
767 |
{Black10xx,0},
|
|
|
768 |
{Black10xx,0},
|
|
|
769 |
{Black10xx,0},
|
|
|
770 |
{Black10xx,0},
|
|
|
771 |
{Black11xx,0},
|
|
|
772 |
{Black11xx,0},
|
|
|
773 |
{Black11xx,0},
|
|
|
774 |
{Black11xx,0},
|
|
|
775 |
};
|
|
|
776 |
|
|
|
777 |
LOCAL_D const THuffmanTable BlackTables0000[16] =
|
|
|
778 |
{
|
|
|
779 |
{NULL,0},
|
|
|
780 |
{Common0000_0001,4},
|
|
|
781 |
{Black0000_0010,5},
|
|
|
782 |
{Black0000_0011,5},
|
|
|
783 |
{Black0000_0100,0},
|
|
|
784 |
{Black0000_0101,4},
|
|
|
785 |
{Black0000_0110,4},
|
|
|
786 |
{Black0000_0111,0},
|
|
|
787 |
{Black0000_100x,0},
|
|
|
788 |
{Black0000_100x,0},
|
|
|
789 |
{Black0000_101x,0},
|
|
|
790 |
{Black0000_101x,0},
|
|
|
791 |
{Black0000_1100,4},
|
|
|
792 |
{Black0000_1101,4},
|
|
|
793 |
{Black0000_111x,0},
|
|
|
794 |
{Black0000_111x,0},
|
|
|
795 |
};
|
|
|
796 |
|
|
|
797 |
TTiffFaxState CTiffFax1dDecoder::DecodeWhite()
|
|
|
798 |
{
|
|
|
799 |
TUint32 bits = iBitCache;
|
|
|
800 |
TUint16 code;
|
|
|
801 |
|
|
|
802 |
if(bits>=0x02000000)
|
|
|
803 |
{
|
|
|
804 |
const THuffmanTable* table = &WhiteTables[GetMostSignificantBits(bits,4)];
|
|
|
805 |
bits &= ~0xf0000000; // zero the 4 most significant bits
|
|
|
806 |
code = table->iCodes[GetMostSignificantBits(bits,4+table->iIndexBits)];
|
|
|
807 |
}
|
|
|
808 |
else if(bits>=0x01000000)
|
|
|
809 |
{
|
|
|
810 |
bits &= ~0xff000000; // zero the 8 most significant bits
|
|
|
811 |
code = Common0000_0001[GetMostSignificantBits(bits,8+4)];
|
|
|
812 |
}
|
|
|
813 |
else
|
|
|
814 |
return(ETiffFaxInvalid);
|
|
|
815 |
|
|
|
816 |
TInt numBits = code&15;
|
|
|
817 |
|
|
|
818 |
if(numBits>iBitCacheLength)
|
|
|
819 |
return(ETiffFaxUnderflow);
|
|
|
820 |
|
|
|
821 |
UseBits(numBits);
|
|
|
822 |
|
|
|
823 |
iCodeType = ETiffFaxWhiteRun;
|
|
|
824 |
iCodeCount = code>>4;
|
|
|
825 |
|
|
|
826 |
if(iCodeCount<64)
|
|
|
827 |
iColor = ETiffFaxBlackRun;
|
|
|
828 |
|
|
|
829 |
return(ETiffFaxPixelRun);
|
|
|
830 |
}
|
|
|
831 |
|
|
|
832 |
TTiffFaxState CTiffFax1dDecoder::DecodeBlack()
|
|
|
833 |
{
|
|
|
834 |
TUint32 bits = iBitCache;
|
|
|
835 |
TUint16 code;
|
|
|
836 |
|
|
|
837 |
if(bits&0xf0000000)
|
|
|
838 |
{
|
|
|
839 |
const THuffmanTable* table = &BlackTables[GetMostSignificantBits(bits,4)];
|
|
|
840 |
bits &= ~0xf0000000; // zero the 4 most significant bits
|
|
|
841 |
code = table->iCodes[GetMostSignificantBits(bits,4+table->iIndexBits)];
|
|
|
842 |
}
|
|
|
843 |
else if(bits&0xff000000)
|
|
|
844 |
{
|
|
|
845 |
const THuffmanTable* table = &BlackTables0000[GetMostSignificantBits(bits,8)];
|
|
|
846 |
bits &= ~0xff000000; // zero the 8 most significant bits
|
|
|
847 |
code = table->iCodes[GetMostSignificantBits(bits,8+table->iIndexBits)];
|
|
|
848 |
}
|
|
|
849 |
else
|
|
|
850 |
return(ETiffFaxInvalid);
|
|
|
851 |
|
|
|
852 |
TInt numBits = code&15;
|
|
|
853 |
|
|
|
854 |
if(numBits>iBitCacheLength)
|
|
|
855 |
return(ETiffFaxUnderflow);
|
|
|
856 |
|
|
|
857 |
UseBits(numBits);
|
|
|
858 |
|
|
|
859 |
iCodeType = ETiffFaxBlackRun;
|
|
|
860 |
iCodeCount = code>>4;
|
|
|
861 |
|
|
|
862 |
if(iCodeCount<64)
|
|
|
863 |
iColor = ETiffFaxWhiteRun;
|
|
|
864 |
|
|
|
865 |
return(ETiffFaxPixelRun);
|
|
|
866 |
}
|
|
|
867 |
|
|
|
868 |
TTiffFaxState CTiffFax1dDecoder::DecodeEndOfLine()
|
|
|
869 |
{
|
|
|
870 |
if(iBitCache>=0x00200000)
|
|
|
871 |
return(ETiffFaxInvalid);
|
|
|
872 |
|
|
|
873 |
FOREVER
|
|
|
874 |
{
|
|
|
875 |
if(iBitCacheLength<12)
|
|
|
876 |
return(ETiffFaxUnderflow);
|
|
|
877 |
if(iBitCache&0x00100000)
|
|
|
878 |
break;
|
|
|
879 |
UseBits(1);
|
|
|
880 |
}
|
|
|
881 |
|
|
|
882 |
UseBits(12);
|
|
|
883 |
|
|
|
884 |
iColor = ETiffFaxWhiteRun;
|
|
|
885 |
|
|
|
886 |
iCodeCount = 1;
|
|
|
887 |
|
|
|
888 |
if(iCodeType==ETiffFaxEndOfLineCode)
|
|
|
889 |
return(ETiffFaxEndOfFax);
|
|
|
890 |
|
|
|
891 |
iCodeType = ETiffFaxEndOfLineCode;
|
|
|
892 |
return(ETiffFaxEndOfLine);
|
|
|
893 |
}
|
|
|
894 |
|
|
|
895 |
|
|
|
896 |
// CTiffFax2dDecoder.
|
|
|
897 |
CTiffFax2dDecoder::~CTiffFax2dDecoder()
|
|
|
898 |
{
|
|
|
899 |
delete []iReferenceRunData;
|
|
|
900 |
}
|
|
|
901 |
|
|
|
902 |
void CTiffFax2dDecoder::ConstructL(const TTiffImageData& aImageData)
|
|
|
903 |
{
|
|
|
904 |
CTiffFax1dDecoder::ConstructL(aImageData);
|
|
|
905 |
iReferenceRunData = new (ELeave) TInt[iRowWidth+2];
|
|
|
906 |
}
|
|
|
907 |
|
|
|
908 |
void CTiffFax2dDecoder::NewStripL(TInt aNumBytes)
|
|
|
909 |
{
|
|
|
910 |
CTiffFax1dDecoder::NewStripL(aNumBytes);
|
|
|
911 |
CTiffFax2dDecoder::NewRow();
|
|
|
912 |
}
|
|
|
913 |
|
|
|
914 |
void CTiffFax2dDecoder::NewRow()
|
|
|
915 |
{
|
|
|
916 |
if(iRunDataIndex&1)
|
|
|
917 |
iRunDataIndex++;
|
|
|
918 |
iRunData[iRunDataIndex] = iRowWidth;
|
|
|
919 |
iRunData[iRunDataIndex+1] = iRowWidth;
|
|
|
920 |
|
|
|
921 |
TInt* temp = iReferenceRunData;
|
|
|
922 |
iReferenceRunData = iRunData;
|
|
|
923 |
iRunData = temp;
|
|
|
924 |
|
|
|
925 |
iReferenceRunDataIndex = 0;
|
|
|
926 |
iHorizontalCodeCount = 0;
|
|
|
927 |
iA0 = 0;
|
|
|
928 |
|
|
|
929 |
CTiffFax1dDecoder::NewRow();
|
|
|
930 |
}
|
|
|
931 |
|
|
|
932 |
TTiffFaxState CTiffFax2dDecoder::Decode2d()
|
|
|
933 |
{
|
|
|
934 |
if(iHorizontalCodeCount)
|
|
|
935 |
return(DecodeHorizontal());
|
|
|
936 |
|
|
|
937 |
TUint32 bits = iBitCache;
|
|
|
938 |
TInt validBits;
|
|
|
939 |
TInt verticalOffset;
|
|
|
940 |
|
|
|
941 |
switch(GetMostSignificantBits(bits,3))
|
|
|
942 |
{
|
|
|
943 |
case 0:
|
|
|
944 |
|
|
|
945 |
switch(GetMostSignificantBits(bits,7))
|
|
|
946 |
{
|
|
|
947 |
case 0:
|
|
|
948 |
case 1:
|
|
|
949 |
return(DecodeEndOfLine());
|
|
|
950 |
case 2:
|
|
|
951 |
verticalOffset = -3;
|
|
|
952 |
validBits = 7;
|
|
|
953 |
break;
|
|
|
954 |
case 3:
|
|
|
955 |
verticalOffset = 3;
|
|
|
956 |
validBits = 7;
|
|
|
957 |
break;
|
|
|
958 |
case 4:
|
|
|
959 |
case 5:
|
|
|
960 |
verticalOffset = -2;
|
|
|
961 |
validBits = 6;
|
|
|
962 |
break;
|
|
|
963 |
case 6:
|
|
|
964 |
case 7:
|
|
|
965 |
verticalOffset = 2;
|
|
|
966 |
validBits = 6;
|
|
|
967 |
break;
|
|
|
968 |
default:
|
|
|
969 |
if(iBitCacheLength<4)
|
|
|
970 |
return(ETiffFaxUnderflow);
|
|
|
971 |
UseBits(4);
|
|
|
972 |
return(DecodePass());
|
|
|
973 |
}
|
|
|
974 |
|
|
|
975 |
break;
|
|
|
976 |
|
|
|
977 |
case 1:
|
|
|
978 |
if(iBitCacheLength<3)
|
|
|
979 |
return(ETiffFaxUnderflow);
|
|
|
980 |
UseBits(3);
|
|
|
981 |
iHorizontalCodeCount = 2;
|
|
|
982 |
return(DecodeHorizontal());
|
|
|
983 |
|
|
|
984 |
case 2:
|
|
|
985 |
|
|
|
986 |
verticalOffset = -1;
|
|
|
987 |
validBits = 3;
|
|
|
988 |
break;
|
|
|
989 |
|
|
|
990 |
case 3:
|
|
|
991 |
|
|
|
992 |
verticalOffset = 1;
|
|
|
993 |
validBits = 3;
|
|
|
994 |
break;
|
|
|
995 |
|
|
|
996 |
default:
|
|
|
997 |
|
|
|
998 |
verticalOffset = 0;
|
|
|
999 |
validBits = 1;
|
|
|
1000 |
break;
|
|
|
1001 |
}
|
|
|
1002 |
|
|
|
1003 |
if(validBits>iBitCacheLength)
|
|
|
1004 |
return(ETiffFaxUnderflow);
|
|
|
1005 |
|
|
|
1006 |
UseBits(validBits);
|
|
|
1007 |
|
|
|
1008 |
return(DecodeVertical(verticalOffset));
|
|
|
1009 |
}
|
|
|
1010 |
|
|
|
1011 |
TTiffFaxState CTiffFax2dDecoder::DecodeHorizontal()
|
|
|
1012 |
{
|
|
|
1013 |
TTiffFaxState returnValue;
|
|
|
1014 |
|
|
|
1015 |
returnValue = Decode1d();
|
|
|
1016 |
if(returnValue!=ETiffFaxPixelRun)
|
|
|
1017 |
return(returnValue);
|
|
|
1018 |
|
|
|
1019 |
iA0 += iCodeCount;
|
|
|
1020 |
|
|
|
1021 |
if(iCodeCount<64)
|
|
|
1022 |
iHorizontalCodeCount--;
|
|
|
1023 |
|
|
|
1024 |
if(iHorizontalCodeCount)
|
|
|
1025 |
return(ETiffFaxPixelRun);
|
|
|
1026 |
|
|
|
1027 |
TInt n = iA0;
|
|
|
1028 |
if(n>=iRowWidth)
|
|
|
1029 |
n = iRowWidth-1;
|
|
|
1030 |
|
|
|
1031 |
TInt i = iReferenceRunDataIndex;
|
|
|
1032 |
|
|
|
1033 |
while(iReferenceRunData[i]<=n)
|
|
|
1034 |
i++;
|
|
|
1035 |
|
|
|
1036 |
if(iColor==ETiffFaxBlackRun)
|
|
|
1037 |
{
|
|
|
1038 |
if(!(i&1))
|
|
|
1039 |
i++;
|
|
|
1040 |
}
|
|
|
1041 |
else
|
|
|
1042 |
{
|
|
|
1043 |
if(i&1)
|
|
|
1044 |
i++;
|
|
|
1045 |
}
|
|
|
1046 |
|
|
|
1047 |
iReferenceRunDataIndex = i;
|
|
|
1048 |
|
|
|
1049 |
return(ETiffFaxPixelRun);
|
|
|
1050 |
}
|
|
|
1051 |
|
|
|
1052 |
TTiffFaxState CTiffFax2dDecoder::DecodeVertical(TInt aDifference)
|
|
|
1053 |
{
|
|
|
1054 |
iA0 = iReferenceRunData[iReferenceRunDataIndex]+aDifference;
|
|
|
1055 |
|
|
|
1056 |
iCodeCount = iA0-iPixelsStoredInRow;
|
|
|
1057 |
iCodeType = iColor;
|
|
|
1058 |
|
|
|
1059 |
if(iColor==ETiffFaxWhiteRun)
|
|
|
1060 |
iColor = ETiffFaxBlackRun;
|
|
|
1061 |
else
|
|
|
1062 |
iColor = ETiffFaxWhiteRun;
|
|
|
1063 |
|
|
|
1064 |
TInt n = iA0;
|
|
|
1065 |
if(n>=iRowWidth)
|
|
|
1066 |
n = iRowWidth-1;
|
|
|
1067 |
|
|
|
1068 |
TInt i = iReferenceRunDataIndex;
|
|
|
1069 |
|
|
|
1070 |
if(i)
|
|
|
1071 |
i--;
|
|
|
1072 |
else
|
|
|
1073 |
i++;
|
|
|
1074 |
|
|
|
1075 |
while(iReferenceRunData[i]<=n)
|
|
|
1076 |
i += 2;
|
|
|
1077 |
|
|
|
1078 |
iReferenceRunDataIndex = i;
|
|
|
1079 |
|
|
|
1080 |
return(ETiffFaxPixelRun);
|
|
|
1081 |
}
|
|
|
1082 |
|
|
|
1083 |
TTiffFaxState CTiffFax2dDecoder::DecodePass()
|
|
|
1084 |
{
|
|
|
1085 |
iA0 = iReferenceRunData[iReferenceRunDataIndex+1];
|
|
|
1086 |
iReferenceRunDataIndex += 2;
|
|
|
1087 |
|
|
|
1088 |
iCodeCount = iA0-iPixelsStoredInRow;
|
|
|
1089 |
iCodeType = iColor;
|
|
|
1090 |
|
|
|
1091 |
return(ETiffFaxPixelRun);
|
|
|
1092 |
}
|
|
|
1093 |
|
|
|
1094 |
|
|
|
1095 |
// CTiffGroup3Fax1dDecoder.
|
|
|
1096 |
CTiffGroup3Fax1dDecoder* CTiffGroup3Fax1dDecoder::NewL(const TTiffImageData& aImageData)
|
|
|
1097 |
{
|
|
|
1098 |
if(aImageData.iT4Options & ~TTiffIfdEntry::ET4ContainsPaddedEols)
|
|
|
1099 |
User::Leave(KErrNotSupported);
|
|
|
1100 |
|
|
|
1101 |
CTiffGroup3Fax1dDecoder* decoder = new (ELeave) CTiffGroup3Fax1dDecoder;
|
|
|
1102 |
|
|
|
1103 |
CleanupStack::PushL(decoder);
|
|
|
1104 |
decoder->ConstructL(aImageData);
|
|
|
1105 |
CleanupStack::Pop();
|
|
|
1106 |
|
|
|
1107 |
return(decoder);
|
|
|
1108 |
}
|
|
|
1109 |
|
|
|
1110 |
TTiffFaxState CTiffGroup3Fax1dDecoder::ProcessNextCode()
|
|
|
1111 |
{
|
|
|
1112 |
return(Decode1d());
|
|
|
1113 |
}
|
|
|
1114 |
|
|
|
1115 |
|
|
|
1116 |
// CTiffGroup3Fax2dDecoder.
|
|
|
1117 |
CTiffGroup3Fax2dDecoder* CTiffGroup3Fax2dDecoder::NewL(const TTiffImageData& aImageData)
|
|
|
1118 |
{
|
|
|
1119 |
if( (aImageData.iT4Options&~TTiffIfdEntry::ET4ContainsPaddedEols) != TTiffIfdEntry::ET4TwoDimentionalCoding )
|
|
|
1120 |
User::Leave(KErrNotSupported);
|
|
|
1121 |
|
|
|
1122 |
CTiffGroup3Fax2dDecoder* decoder = new (ELeave) CTiffGroup3Fax2dDecoder;
|
|
|
1123 |
|
|
|
1124 |
CleanupStack::PushL(decoder);
|
|
|
1125 |
decoder->ConstructL(aImageData);
|
|
|
1126 |
CleanupStack::Pop();
|
|
|
1127 |
|
|
|
1128 |
return(decoder);
|
|
|
1129 |
}
|
|
|
1130 |
|
|
|
1131 |
void CTiffGroup3Fax2dDecoder::NewStripL(TInt aNumBytes)
|
|
|
1132 |
{
|
|
|
1133 |
CTiffFax2dDecoder::NewStripL(aNumBytes);
|
|
|
1134 |
iState = E1d;
|
|
|
1135 |
}
|
|
|
1136 |
|
|
|
1137 |
TTiffFaxState CTiffGroup3Fax2dDecoder::ProcessNextCode()
|
|
|
1138 |
{
|
|
|
1139 |
if(iState!=ESelect1d2d)
|
|
|
1140 |
{
|
|
|
1141 |
TTiffFaxState returnValue;
|
|
|
1142 |
|
|
|
1143 |
if(iState==E1d)
|
|
|
1144 |
returnValue = Decode1d();
|
|
|
1145 |
else
|
|
|
1146 |
returnValue = Decode2d();
|
|
|
1147 |
|
|
|
1148 |
if(returnValue!=ETiffFaxEndOfLine)
|
|
|
1149 |
return(returnValue);
|
|
|
1150 |
|
|
|
1151 |
iState = ESelect1d2d;
|
|
|
1152 |
}
|
|
|
1153 |
|
|
|
1154 |
if(!iBitCacheLength)
|
|
|
1155 |
return(ETiffFaxUnderflow);
|
|
|
1156 |
|
|
|
1157 |
if(iBitCache&((TUint32)1<<31))
|
|
|
1158 |
iState = E1d;
|
|
|
1159 |
else
|
|
|
1160 |
iState = E2d;
|
|
|
1161 |
|
|
|
1162 |
UseBits(1);
|
|
|
1163 |
|
|
|
1164 |
return(ETiffFaxEndOfLine);
|
|
|
1165 |
}
|
|
|
1166 |
|
|
|
1167 |
void CTiffGroup3Fax2dDecoder::NewRow()
|
|
|
1168 |
{
|
|
|
1169 |
if(iState==E1d)
|
|
|
1170 |
CTiffFax1dDecoder::NewRow();
|
|
|
1171 |
else
|
|
|
1172 |
CTiffFax2dDecoder::NewRow();
|
|
|
1173 |
}
|
|
|
1174 |
|
|
|
1175 |
|
|
|
1176 |
// CTiffGroup4FaxDecoder.
|
|
|
1177 |
CTiffGroup4FaxDecoder* CTiffGroup4FaxDecoder::NewL(const TTiffImageData& aImageData)
|
|
|
1178 |
{
|
|
|
1179 |
if(aImageData.iT6Options!=0)
|
|
|
1180 |
User::Leave(KErrNotSupported);
|
|
|
1181 |
|
|
|
1182 |
CTiffGroup4FaxDecoder* decoder = new (ELeave) CTiffGroup4FaxDecoder;
|
|
|
1183 |
|
|
|
1184 |
CleanupStack::PushL(decoder);
|
|
|
1185 |
decoder->ConstructL(aImageData);
|
|
|
1186 |
CleanupStack::Pop();
|
|
|
1187 |
|
|
|
1188 |
return(decoder);
|
|
|
1189 |
}
|
|
|
1190 |
|
|
|
1191 |
TTiffFaxState CTiffGroup4FaxDecoder::ProcessNextCode()
|
|
|
1192 |
{
|
|
|
1193 |
if((iA0==iRowWidth) && (iHorizontalCodeCount==0))
|
|
|
1194 |
return(ETiffFaxEndOfLine);
|
|
|
1195 |
|
|
|
1196 |
return(Decode2d());
|
|
|
1197 |
}
|
|
|
1198 |
|