//
// Stream.h
//
-// Copyright 1996-2002 Glyph & Cog, LLC
+// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
#ifndef STREAM_H
#define STREAM_H
-#ifdef __GNUC__
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
strCCITTFax,
strDCT,
strFlate,
+ strJBIG2,
+ strJPX,
strWeird // internal-use stream types
};
virtual void setPos(Guint pos, int dir = 0) = 0;
// Get PostScript command for the filter(s).
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
// Does this stream type potentially contain non-printable chars?
virtual GBool isBinary(GBool last = gTrue) = 0;
- // Get the BaseStream or EmbedStream of this stream.
+ // Get the BaseStream of this stream.
virtual BaseStream *getBaseStream() = 0;
// Get the dictionary associated with this stream.
// Returns the new stream.
Stream *addFilters(Object *dict);
+ // Tell this stream to ignore any length limitation -- this only
+ // applies to BaseStream subclasses, and is used as a hack to work
+ // around broken PDF files with incorrect stream lengths.
+ virtual void ignoreLength() {}
+
private:
Stream *makeFilter(char *name, Stream *str, Object *params);
virtual Stream *makeSubStream(Guint start, GBool limited,
Guint length, Object *dict) = 0;
virtual void setPos(Guint pos, int dir = 0) = 0;
+ virtual GBool isBinary(GBool last = gTrue) { return last; }
virtual BaseStream *getBaseStream() { return this; }
virtual Dict *getDict() { return dict.getDict(); }
virtual void setPos(Guint pos, int dir = 0);
virtual BaseStream *getBaseStream() { return str->getBaseStream(); }
virtual Dict *getDict() { return str->getDict(); }
+ virtual void ignoreLength() { str->ignoreLength(); }
protected:
// at least nComps elements. Returns false at end of file.
GBool getPixel(Guchar *pix);
+ // Returns a pointer to the next line of pixels. Returns NULL at
+ // end of file.
+ Guchar *getLine();
+
// Skip an entire line from the image.
void skipLine();
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
virtual int getPos() { return bufPos + (bufPtr - buf); }
virtual void setPos(Guint pos, int dir = 0);
- virtual GBool isBinary(GBool last = gTrue) { return last; }
+ virtual void ignoreLength() { limited = gFalse; }
virtual Guint getStart() { return start; }
virtual void moveStart(int delta);
class MemStream: public BaseStream {
public:
- MemStream(char *bufA, Guint lengthA, Object *dictA);
+ MemStream(char *bufA, Guint startA, Guint lengthA, Object *dictA);
virtual ~MemStream();
virtual Stream *makeSubStream(Guint start, GBool limited,
Guint lengthA, Object *dictA);
{ return (bufPtr < bufEnd) ? (*bufPtr++ & 0xff) : EOF; }
virtual int lookChar()
{ return (bufPtr < bufEnd) ? (*bufPtr & 0xff) : EOF; }
- virtual int getPos() { return bufPtr - buf; }
+ virtual int getPos() { return (int)(bufPtr - buf); }
virtual void setPos(Guint pos, int dir = 0);
- virtual GBool isBinary(GBool last = gTrue) { return last; }
- virtual Guint getStart() { return 0; }
+ virtual Guint getStart() { return start; }
virtual void moveStart(int delta);
#ifndef NO_DECRYPTION
virtual void doDecryption(Guchar *fileKey, int keyLength,
private:
char *buf;
+ Guint start;
Guint length;
- GBool needFree;
char *bufEnd;
char *bufPtr;
+ GBool needFree;
};
//------------------------------------------------------------------------
class EmbedStream: public BaseStream {
public:
- EmbedStream(Stream *strA, Object *dictA);
+ EmbedStream(Stream *strA, Object *dictA, GBool limitedA, Guint lengthA);
virtual ~EmbedStream();
- virtual Stream *makeSubStream(Guint start, GBool limited,
- Guint length, Object *dictA);
+ virtual Stream *makeSubStream(Guint start, GBool limitedA,
+ Guint lengthA, Object *dictA);
virtual StreamKind getKind() { return str->getKind(); }
virtual void reset() {}
- virtual int getChar() { return str->getChar(); }
- virtual int lookChar() { return str->lookChar(); }
+ virtual int getChar();
+ virtual int lookChar();
virtual int getPos() { return str->getPos(); }
virtual void setPos(Guint pos, int dir = 0);
- virtual GBool isBinary(GBool last = gTrue) { return last; }
virtual Guint getStart();
virtual void moveStart(int delta);
private:
Stream *str;
+ GBool limited;
+ Guint length;
};
//------------------------------------------------------------------------
virtual int getChar()
{ int c = lookChar(); buf = EOF; return c; }
virtual int lookChar();
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
private:
virtual int getChar()
{ int ch = lookChar(); ++index; return ch; }
virtual int lookChar();
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
private:
virtual int getChar();
virtual int lookChar();
virtual int getRawChar();
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
private:
StreamPredictor *pred; // predictor
int early; // early parameter
- FILE *zPipe; // uncompress pipe
- GString *zName; // .Z file name
+ GBool eof; // true if at eof
int inputBuf; // input buffer
int inputBits; // number of bits in input buffer
- int inCodeBits; // size of input code
- char buf[256]; // buffer
- char *bufPtr; // next char to read
- char *bufEnd; // end of buffer
-
- void dumpFile(FILE *f);
+ struct { // decoding table
+ int length;
+ int head;
+ Guchar tail;
+ } table[4097];
+ int nextCode; // next code to be used
+ int nextBits; // number of bits in next code word
+ int prevCode; // previous code used in stream
+ int newChar; // next char to be added to table
+ Guchar seqBuf[4097]; // buffer for current sequence
+ int seqLength; // length of current sequence
+ int seqIndex; // index into current sequence
+ GBool first; // first code after a table clear
+
+ GBool processNextCode();
+ void clearTable();
int getCode();
- GBool fillBuf();
};
//------------------------------------------------------------------------
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
private:
virtual int getChar()
{ int c = lookChar(); buf = EOF; return c; }
virtual int lookChar();
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
private:
// DCT component info
struct DCTCompInfo {
int id; // component ID
- GBool inScan; // is this component in the current scan?
int hSample, vSample; // horiz/vert sampling resolutions
int quantTable; // quantization table number
- int dcHuffTable, acHuffTable; // Huffman table numbers
int prevDC; // DC coefficient accumulator
};
+struct DCTScanInfo {
+ GBool comp[4]; // comp[i] is set if component i is
+ // included in this scan
+ int numComps; // number of components in the scan
+ int dcHuffTable[4]; // DC Huffman table numbers
+ int acHuffTable[4]; // AC Huffman table numbers
+ int firstCoeff, lastCoeff; // first and last DCT coefficient
+ int ah, al; // successive approximation parameters
+};
+
// DCT Huffman decoding table
struct DCTHuffTable {
Guchar firstSym[17]; // first symbol for this bit length
virtual void reset();
virtual int getChar();
virtual int lookChar();
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
Stream *getRawStream() { return str; }
private:
+ GBool progressive; // set if in progressive mode
+ GBool interleaved; // set if in interleaved mode
int width, height; // image size
int mcuWidth, mcuHeight; // size of min coding unit, in data units
+ int bufWidth, bufHeight; // frameBuf size
DCTCompInfo compInfo[4]; // info for each component
+ DCTScanInfo scanInfo; // info for the current scan
int numComps; // number of components in image
int colorXform; // need YCbCr-to-RGB transform?
+ GBool gotJFIFMarker; // set if APP0 JFIF marker was present
GBool gotAdobeMarker; // set if APP14 Adobe marker was present
int restartInterval; // restart interval, in MCUs
Guchar quantTables[4][64]; // quantization tables
DCTHuffTable acHuffTables[4]; // AC Huffman tables
int numDCHuffTables; // number of DC Huffman tables
int numACHuffTables; // number of AC Huffman tables
- Guchar *rowBuf[4][32]; // buffer for one MCU
+ Guchar *rowBuf[4][32]; // buffer for one MCU (non-progressive mode)
+ int *frameBuf[4]; // buffer for frame (progressive mode)
int comp, x, y, dy; // current position within image/MCU
int restartCtr; // MCUs left until restart
int restartMarker; // next restart marker
+ int eobRun; // number of EOBs left in the current run
int inputBuf; // input buffer for variable length codes
int inputBits; // number of valid bits in input buffer
void restart();
GBool readMCURow();
- GBool readDataUnit(DCTHuffTable *dcHuffTable, DCTHuffTable *acHuffTable,
- Guchar quantTable[64], int *prevDC, Guchar data[64]);
+ void readScan();
+ GBool readDataUnit(DCTHuffTable *dcHuffTable,
+ DCTHuffTable *acHuffTable,
+ int *prevDC, int data[64]);
+ GBool readProgressiveDataUnit(DCTHuffTable *dcHuffTable,
+ DCTHuffTable *acHuffTable,
+ int *prevDC, int data[64]);
+ void decodeImage();
+ void transformDataUnit(Guchar *quantTable,
+ int dataIn[64], Guchar dataOut[64]);
int readHuffSym(DCTHuffTable *table);
int readAmp(int size);
int readBit();
GBool readHeader();
- GBool readFrameInfo();
+ GBool readBaselineSOF();
+ GBool readProgressiveSOF();
GBool readScanInfo();
GBool readQuantTables();
GBool readHuffmanTables();
GBool readRestartInterval();
+ GBool readJFIFMarker();
GBool readAdobeMarker();
GBool readTrailer();
int readMarker();
// Huffman code table entry
struct FlateCode {
- int len; // code length in bits
- int code; // code word
- int val; // value represented by this code
+ Gushort len; // code length, in bits
+ Gushort val; // value represented by this code
};
-// Huffman code table
struct FlateHuffmanTab {
- int start[flateMaxHuffman+2]; // indexes of first code of each length
- FlateCode *codes; // codes, sorted by length and code word
+ FlateCode *codes;
+ int maxLen;
};
// Decoding info for length and distance code words
virtual int getChar();
virtual int lookChar();
virtual int getRawChar();
- virtual GString *getPSFilter(char *indent);
+ virtual GString *getPSFilter(int psLevel, char *indent);
virtual GBool isBinary(GBool last = gTrue);
private:
int remain; // number valid bytes in output buffer
int codeBuf; // input buffer
int codeSize; // number of bits in input buffer
- FlateCode // literal and distance codes
- allCodes[flateMaxLitCodes + flateMaxDistCodes];
+ int // literal and distance code lengths
+ codeLengths[flateMaxLitCodes + flateMaxDistCodes];
FlateHuffmanTab litCodeTab; // literal code table
FlateHuffmanTab distCodeTab; // distance code table
GBool compressedBlock; // set if reading a compressed block
GBool startBlock();
void loadFixedCodes();
GBool readDynamicCodes();
- void compHuffmanCodes(FlateHuffmanTab *tab, int n);
+ void compHuffmanCodes(int *lengths, int n, FlateHuffmanTab *tab);
int getHuffmanCodeWord(FlateHuffmanTab *tab);
int getCodeWord(int bits);
};
virtual void reset() {}
virtual int getChar() { return EOF; }
virtual int lookChar() { return EOF; }
- virtual GString *getPSFilter(char *indent) { return NULL; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
};
~FixedLengthEncoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
- virtual void close();
virtual int getChar();
virtual int lookChar();
- virtual GString *getPSFilter(char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
+ virtual GBool isBinary(GBool last = gTrue);
virtual GBool isEncoder() { return gTrue; }
private:
virtual ~ASCIIHexEncoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
- virtual void close();
virtual int getChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
virtual GBool isEncoder() { return gTrue; }
virtual ~ASCII85Encoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
- virtual void close();
virtual int getChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
virtual GBool isEncoder() { return gTrue; }
virtual ~RunLengthEncoder();
virtual StreamKind getKind() { return strWeird; }
virtual void reset();
- virtual void close();
virtual int getChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr++ & 0xff); }
virtual int lookChar()
{ return (bufPtr >= bufEnd && !fillBuf()) ? EOF : (*bufPtr & 0xff); }
- virtual GString *getPSFilter(char *indent) { return NULL; }
- virtual GBool isBinary(GBool last = gTrue) { return gFalse; }
+ virtual GString *getPSFilter(int psLevel, char *indent) { return NULL; }
+ virtual GBool isBinary(GBool last = gTrue) { return gTrue; }
virtual GBool isEncoder() { return gTrue; }
private:
git.asbjorn.biz / swftools.git / blobdiff