public override void readSegment()
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("==== Read Segment Symbol Dictionary ====");
}
/** read symbol dictionary flags */
readSymbolDictionaryFlags();
//List codeTables = new ArrayList();
int numberOfInputSymbols = 0;
int noOfReferredToSegments = segmentHeader.getReferredToSegmentCount();
int[] referredToSegments = segmentHeader.getReferredToSegments();
long i = 0;
for (i = 0; i < noOfReferredToSegments; i++)
{
Segment seg = decoder.findSegment(referredToSegments[i]);
int type = seg.getSegmentHeader().getSegmentType();
if (type == Segment.SYMBOL_DICTIONARY)
{
numberOfInputSymbols += ((SymbolDictionarySegment)seg).noOfExportedSymbols;
}
else if (type == Segment.TABLES)
{
//codeTables.add(seg);
}
}
int symbolCodeLength = 0;
i = 1;
while (i < numberOfInputSymbols + noOfNewSymbols)
{
symbolCodeLength++;
i <<= 1;
}
JBIG2Bitmap[] bitmaps = new JBIG2Bitmap[numberOfInputSymbols + noOfNewSymbols];
long j, k = 0;
SymbolDictionarySegment inputSymbolDictionary = null;
for (i = 0; i < noOfReferredToSegments; i++)
{
Segment seg = decoder.findSegment(referredToSegments[i]);
if (seg.getSegmentHeader().getSegmentType() == Segment.SYMBOL_DICTIONARY)
{
inputSymbolDictionary = (SymbolDictionarySegment)seg;
for (j = 0; j < inputSymbolDictionary.noOfExportedSymbols; j++)
{
bitmaps[k++] = inputSymbolDictionary.bitmaps[j];
}
}
}
long[,] huffmanDHTable = null;
long[,] huffmanDWTable = null;
long[,] huffmanBMSizeTable = null;
long[,] huffmanAggInstTable = null;
bool sdHuffman = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_HUFF) != 0;
int sdHuffmanDifferenceHeight = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_HUFF_DH);
int sdHuffmanDiferrenceWidth = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_HUFF_DW);
int sdHuffBitmapSize = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_HUFF_BM_SIZE);
int sdHuffAggregationInstances = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_HUFF_AGG_INST);
i = 0;
if (sdHuffman)
{
if (sdHuffmanDifferenceHeight == 0)
{
huffmanDHTable = HuffmanDecoder.huffmanTableD;
}
else if (sdHuffmanDifferenceHeight == 1)
{
huffmanDHTable = HuffmanDecoder.huffmanTableE;
}
else
{
//huffmanDHTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
if (sdHuffmanDiferrenceWidth == 0)
{
huffmanDWTable = HuffmanDecoder.huffmanTableB;
}
else if (sdHuffmanDiferrenceWidth == 1)
{
huffmanDWTable = HuffmanDecoder.huffmanTableC;
}
else
{
//huffmanDWTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
if (sdHuffBitmapSize == 0)
{
huffmanBMSizeTable = HuffmanDecoder.huffmanTableA;
}
else
{
//huffmanBMSizeTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
if (sdHuffAggregationInstances == 0)
{
huffmanAggInstTable = HuffmanDecoder.huffmanTableA;
}
else
{
//huffmanAggInstTable = ((JBIG2CodeTable) codeTables.get(i++)).getHuffTable();
}
}
int contextUsed = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.BITMAP_CC_USED);
int sdTemplate = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_TEMPLATE);
if (!sdHuffman)
{
if (contextUsed != 0 && inputSymbolDictionary != null)
{
arithmeticDecoder.resetGenericStats(sdTemplate, inputSymbolDictionary.genericRegionStats);
}
else
{
arithmeticDecoder.resetGenericStats(sdTemplate, null);
}
arithmeticDecoder.resetIntStats(symbolCodeLength);
arithmeticDecoder.start();
}
int sdRefinementAggregate = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_REF_AGG);
int sdRefinementTemplate = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.SD_R_TEMPLATE);
if (sdRefinementAggregate != 0)
{
if (contextUsed != 0 && inputSymbolDictionary != null)
{
arithmeticDecoder.resetRefinementStats(sdRefinementTemplate, inputSymbolDictionary.refinementRegionStats);
}
else
{
arithmeticDecoder.resetRefinementStats(sdRefinementTemplate, null);
}
}
long[] deltaWidths = new long[noOfNewSymbols];
long deltaHeight = 0;
i = 0;
while (i < noOfNewSymbols)
{
long instanceDeltaHeight = 0;
if (sdHuffman)
{
instanceDeltaHeight = huffmanDecoder.decodeInt(huffmanDHTable).intResult();
}
else
{
instanceDeltaHeight = arithmeticDecoder.decodeInt(arithmeticDecoder.iadhStats).intResult();
}
if (instanceDeltaHeight < 0 && -instanceDeltaHeight >= deltaHeight)
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Bad delta-height value in JBIG2 symbol dictionary");
}
}
deltaHeight += instanceDeltaHeight;
long symbolWidth = 0;
long totalWidth = 0;
j = i;
while (true)
{
long deltaWidth = 0;
DecodeIntResult decodeIntResult;
if (sdHuffman)
{
decodeIntResult = huffmanDecoder.decodeInt(huffmanDWTable);
}
else
{
decodeIntResult = arithmeticDecoder.decodeInt(arithmeticDecoder.iadwStats);
}
if (!decodeIntResult.booleanResult())
{
break;
}
deltaWidth = decodeIntResult.intResult();
if (deltaWidth < 0 && -deltaWidth >= symbolWidth)
{
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("Bad delta-width value in JBIG2 symbol dictionary");
}
}
symbolWidth += deltaWidth;
if (sdHuffman && sdRefinementAggregate == 0)
{
deltaWidths[i] = symbolWidth;
totalWidth += symbolWidth;
}
else if (sdRefinementAggregate == 1)
{
long refAggNum = 0;
if (sdHuffman)
{
refAggNum = huffmanDecoder.decodeInt(huffmanAggInstTable).intResult();
}
else
{
refAggNum = arithmeticDecoder.decodeInt(arithmeticDecoder.iaaiStats).intResult();
}
if (refAggNum == 1)
{
long symbolID = 0, referenceDX = 0, referenceDY = 0;
if (sdHuffman)
{
symbolID = decoder.readBits(symbolCodeLength);
referenceDX = huffmanDecoder.decodeInt(HuffmanDecoder.huffmanTableO).intResult();
referenceDY = huffmanDecoder.decodeInt(HuffmanDecoder.huffmanTableO).intResult();
decoder.consumeRemainingBits();
arithmeticDecoder.start();
}
else
{
symbolID = (int)arithmeticDecoder.decodeIAID(symbolCodeLength, arithmeticDecoder.iaidStats);
referenceDX = arithmeticDecoder.decodeInt(arithmeticDecoder.iardxStats).intResult();
referenceDY = arithmeticDecoder.decodeInt(arithmeticDecoder.iardyStats).intResult();
}
JBIG2Bitmap referredToBitmap = bitmaps[symbolID];
JBIG2Bitmap bitmap = new JBIG2Bitmap(symbolWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.readGenericRefinementRegion(sdRefinementTemplate, false, referredToBitmap, referenceDX, referenceDY, symbolDictionaryRAdaptiveTemplateX,
symbolDictionaryRAdaptiveTemplateY);
bitmaps[numberOfInputSymbols + i] = bitmap;
}
else
{
JBIG2Bitmap bitmap = new JBIG2Bitmap(symbolWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.readTextRegion(sdHuffman, true, refAggNum, 0, numberOfInputSymbols + i, null, symbolCodeLength, bitmaps, 0, 0, false, 1, 0,
HuffmanDecoder.huffmanTableF, HuffmanDecoder.huffmanTableH, HuffmanDecoder.huffmanTableK, HuffmanDecoder.huffmanTableO, HuffmanDecoder.huffmanTableO,
HuffmanDecoder.huffmanTableO, HuffmanDecoder.huffmanTableO, HuffmanDecoder.huffmanTableA, sdRefinementTemplate, symbolDictionaryRAdaptiveTemplateX,
symbolDictionaryRAdaptiveTemplateY, decoder);
bitmaps[numberOfInputSymbols + i] = bitmap;
}
}
else
{
JBIG2Bitmap bitmap = new JBIG2Bitmap(symbolWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
bitmap.readBitmap(false, sdTemplate, false, false, null, symbolDictionaryAdaptiveTemplateX, symbolDictionaryAdaptiveTemplateY, 0);
bitmaps[numberOfInputSymbols + i] = bitmap;
}
i++;
}
if (sdHuffman && sdRefinementAggregate == 0)
{
long bmSize = huffmanDecoder.decodeInt(huffmanBMSizeTable).intResult();
decoder.consumeRemainingBits();
JBIG2Bitmap collectiveBitmap = new JBIG2Bitmap(totalWidth, deltaHeight, arithmeticDecoder, huffmanDecoder, mmrDecoder);
if (bmSize == 0)
{
long padding = totalWidth % 8;
long bytesPerRow = (int)Math.Ceiling(totalWidth / 8d);
//short[] bitmap = new short[totalWidth];
//decoder.readbyte(bitmap);
long size = deltaHeight * ((totalWidth + 7) >> 3);
short[] bitmap = new short[size];
decoder.readbyte(bitmap);
short[][] logicalMap = new short[deltaHeight][];
int count = 0;
for (int row = 0; row < deltaHeight; row++)
{
for (int col = 0; col < bytesPerRow; col++)
{
logicalMap[row][col] = bitmap[count];
count++;
}
}
int collectiveBitmapRow = 0, collectiveBitmapCol = 0;
for (int row = 0; row < deltaHeight; row++)
{
for (int col = 0; col < bytesPerRow; col++)
{
if (col == (bytesPerRow - 1)) // this is the last
// byte in the row
{
short currentbyte = logicalMap[row][col];
for (int bitPointer = 7; bitPointer >= padding; bitPointer--)
{
short mask = (short)(1 << bitPointer);
int bit = (currentbyte & mask) >> bitPointer;
collectiveBitmap.setPixel(collectiveBitmapCol, collectiveBitmapRow, bit);
collectiveBitmapCol++;
}
collectiveBitmapRow++;
collectiveBitmapCol = 0;
}
else
{
short currentbyte = logicalMap[row][col];
for (int bitPointer = 7; bitPointer >= 0; bitPointer--)
{
short mask = (short)(1 << bitPointer);
int bit = (currentbyte & mask) >> bitPointer;
collectiveBitmap.setPixel(collectiveBitmapCol, collectiveBitmapRow, bit);
collectiveBitmapCol++;
}
}
}
}
}
else
{
collectiveBitmap.readBitmap(true, 0, false, false, null, null, null, bmSize);
}
long x = 0;
while (j < i)
{
bitmaps[numberOfInputSymbols + j] = collectiveBitmap.getSlice(x, 0, deltaWidths[j], deltaHeight);
x += deltaWidths[j];
j++;
}
}
}
this.bitmaps = new JBIG2Bitmap[noOfExportedSymbols];
j = i = 0;
bool export = false;
while (i < numberOfInputSymbols + noOfNewSymbols)
{
long run = 0;
if (sdHuffman)
{
run = huffmanDecoder.decodeInt(HuffmanDecoder.huffmanTableA).intResult();
}
else
{
run = arithmeticDecoder.decodeInt(arithmeticDecoder.iaexStats).intResult();
}
if (export)
{
for (int cnt = 0; cnt < run; cnt++)
{
this.bitmaps[j++] = bitmaps[i++];
}
}
else
{
i += run;
}
export = !export;
}
int contextRetained = symbolDictionaryFlags.getFlagValue(SymbolDictionaryFlags.BITMAP_CC_RETAINED);
if (!sdHuffman && contextRetained == 1)
{
genericRegionStats = genericRegionStats.copy();
if (sdRefinementAggregate == 1)
{
refinementRegionStats = refinementRegionStats.copy();
}
}
/** consume any remaining bits */
decoder.consumeRemainingBits();
}
private void readSegments()
{
bool finished = false;
while (!reader.isFinished() && !finished)
{
SegmentHeader segmentHeader = new SegmentHeader();
readSegmentHeader(segmentHeader);
// read the Segment data
Segment segment = null;
int segmentType = segmentHeader.getSegmentType();
int[] referredToSegments = segmentHeader.getReferredToSegments();
int noOfReferredToSegments = segmentHeader.getReferredToSegmentCount();
switch (segmentType)
{
case Segment.SYMBOL_DICTIONARY:
segment = new SymbolDictionarySegment(this);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_TEXT_REGION:
segment = new TextRegionSegment(this, false);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_TEXT_REGION:
segment = new TextRegionSegment(this, true);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_TEXT_REGION:
segment = new TextRegionSegment(this, true);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.PATTERN_DICTIONARY:
segment = new PatternDictionarySegment(this);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_HALFTONE_REGION:
segment = new HalftoneRegionSegment(this, false);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_HALFTONE_REGION:
segment = new HalftoneRegionSegment(this, true);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_HALFTONE_REGION:
segment = new HalftoneRegionSegment(this, true);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_GENERIC_REGION:
segment = new GenericRegionSegment(this, false);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_GENERIC_REGION:
segment = new GenericRegionSegment(this, true);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_GENERIC_REGION:
segment = new GenericRegionSegment(this, true);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_GENERIC_REFINEMENT_REGION:
segment = new RefinementRegionSegment(this, false, referredToSegments, noOfReferredToSegments);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_GENERIC_REFINEMENT_REGION:
segment = new RefinementRegionSegment(this, true, referredToSegments, noOfReferredToSegments);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION:
segment = new RefinementRegionSegment(this, true, referredToSegments, noOfReferredToSegments);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.PAGE_INFORMATION:
segment = new PageInformationSegment(this);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.END_OF_PAGE:
continue;
case Segment.END_OF_STRIPE:
segment = new EndOfStripeSegment(this);
segment.setSegmentHeader(segmentHeader);
break;
case Segment.END_OF_FILE:
finished = true;
continue;
case Segment.PROFILES:
break;
case Segment.TABLES:
break;
case Segment.EXTENSION:
segment = new ExtensionSegment(this);
segment.setSegmentHeader(segmentHeader);
break;
default:
break;
}
if (!randomAccessOrganisation)
{
segment.readSegment();
}
segments.Add(segment);
}
if (randomAccessOrganisation)
{
foreach (Segment segment in segments)
{
segment.readSegment();
}
}
}