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Diffstat (limited to 'pdf/xpdf/JArithmeticDecoder.h')
-rw-r--r-- | pdf/xpdf/JArithmeticDecoder.h | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/pdf/xpdf/JArithmeticDecoder.h b/pdf/xpdf/JArithmeticDecoder.h deleted file mode 100644 index a348017..0000000 --- a/pdf/xpdf/JArithmeticDecoder.h +++ /dev/null @@ -1,91 +0,0 @@ -//======================================================================== -// -// JArithmeticDecoder.h -// -// Arithmetic decoder used by the JBIG2 and JPEG2000 decoders. -// -// Copyright 2002-2004 Glyph & Cog, LLC -// -//======================================================================== - -#ifndef JARITHMETICDECODER_H -#define JARITHMETICDECODER_H - -#include <aconf.h> - -#ifdef USE_GCC_PRAGMAS -#pragma interface -#endif - -#include "gtypes.h" - -class Stream; - -//------------------------------------------------------------------------ -// JArithmeticDecoderStats -//------------------------------------------------------------------------ - -class JArithmeticDecoderStats { -public: - - JArithmeticDecoderStats(int contextSizeA); - ~JArithmeticDecoderStats(); - JArithmeticDecoderStats *copy(); - void reset(); - int getContextSize() { return contextSize; } - void copyFrom(JArithmeticDecoderStats *stats); - void setEntry(Guint cx, int i, int mps); - -private: - - Guchar *cxTab; // cxTab[cx] = (i[cx] << 1) + mps[cx] - int contextSize; - - friend class JArithmeticDecoder; -}; - -//------------------------------------------------------------------------ -// JArithmeticDecoder -//------------------------------------------------------------------------ - -class JArithmeticDecoder { -public: - - JArithmeticDecoder(); - ~JArithmeticDecoder(); - void setStream(Stream *strA) - { str = strA; dataLen = -1; } - void setStream(Stream *strA, int dataLenA) - { str = strA; dataLen = dataLenA; } - void start(); - int decodeBit(Guint context, JArithmeticDecoderStats *stats); - int decodeByte(Guint context, JArithmeticDecoderStats *stats); - - // Returns false for OOB, otherwise sets *<x> and returns true. - GBool decodeInt(int *x, JArithmeticDecoderStats *stats); - - Guint decodeIAID(Guint codeLen, - JArithmeticDecoderStats *stats); - -private: - - Guint readByte(); - int decodeIntBit(JArithmeticDecoderStats *stats); - void byteIn(); - - static Guint qeTab[47]; - static int nmpsTab[47]; - static int nlpsTab[47]; - static int switchTab[47]; - - Guint buf0, buf1; - Guint c, a; - int ct; - - Guint prev; // for the integer decoder - - Stream *str; - int dataLen; -}; - -#endif |