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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef _JBIG2_CONTEXT_H_
#define _JBIG2_CONTEXT_H_
#include "JBig2_Module.h"
#include "JBig2_List.h"
#include "JBig2_Segment.h"
#include "JBig2_Page.h"
#include "JBig2_GeneralDecoder.h"
#include "../../../include/fxcodec/fx_codec_def.h"
#include "../../../include/fxcrt/fx_basic.h"
#include <utility>
typedef std::pair<FX_BYTE*, CJBig2_SymbolDict*> CJBig2_CachePair;
typedef enum {
JBIG2_OUT_OF_PAGE = 0,
JBIG2_IN_PAGE,
} JBig2State;
#define JBIG2_SUCCESS 0
#define JBIG2_FAILED -1
#define JBIG2_ERROR_TOO_SHORT -2
#define JBIG2_ERROR_FETAL -3
#define JBIG2_END_OF_PAGE 2
#define JBIG2_END_OF_FILE 3
#define JBIG2_ERROR_FILE_FORMAT -4
#define JBIG2_ERROR_STREAM_TYPE -5
#define JBIG2_ERROR_LIMIT -6
#define JBIG2_FILE_STREAM 0
#define JBIG2_SQUENTIAL_STREAM 1
#define JBIG2_RANDOM_STREAM 2
#define JBIG2_EMBED_STREAM 3
#define JBIG2_MIN_SEGMENT_SIZE 11
class CJBig2_Context : public CJBig2_Object
{
public:
static CJBig2_Context *CreateContext(CJBig2_Module *pModule, FX_BYTE *pGlobalData, FX_DWORD dwGlobalLength,
FX_BYTE *pData, FX_DWORD dwLength, FX_INT32 nStreamType, std::list<CJBig2_CachePair>* pSymbolDictCache, IFX_Pause* pPause = NULL);
static void DestroyContext(CJBig2_Context *pContext);
FX_INT32 getFirstPage(FX_BYTE *pBuf, FX_INT32 width, FX_INT32 height, FX_INT32 stride, IFX_Pause* pPause);
FX_INT32 getNextPage(FX_BYTE *pBuf, FX_INT32 width, FX_INT32 height, FX_INT32 stride, IFX_Pause* pPause);
FX_INT32 getFirstPage(CJBig2_Image **image, IFX_Pause* pPause);
FX_INT32 getNextPage(CJBig2_Image **image, IFX_Pause* pPause);
FX_INT32 Continue(IFX_Pause* pPause);
FXCODEC_STATUS GetProcessiveStatus()
{
return m_ProcessiveStatus;
};
private:
CJBig2_Context(FX_BYTE *pGlobalData, FX_DWORD dwGlobalLength,
FX_BYTE *pData, FX_DWORD dwLength, FX_INT32 nStreamType, std::list<CJBig2_CachePair>* pSymbolDictCache, IFX_Pause* pPause);
~CJBig2_Context();
FX_INT32 decodeFile(IFX_Pause* pPause);
FX_INT32 decode_SquentialOrgnazation(IFX_Pause* pPause);
FX_INT32 decode_EmbedOrgnazation(IFX_Pause* pPause);
FX_INT32 decode_RandomOrgnazation_FirstPage(IFX_Pause* pPause);
FX_INT32 decode_RandomOrgnazation(IFX_Pause* pPause);
CJBig2_Segment *findSegmentByNumber(FX_DWORD dwNumber);
CJBig2_Segment *findReferredSegmentByTypeAndIndex(CJBig2_Segment *pSegment, FX_BYTE cType, FX_INT32 nIndex);
FX_INT32 parseSegmentHeader(CJBig2_Segment *pSegment);
FX_INT32 parseSegmentData(CJBig2_Segment *pSegment, IFX_Pause* pPause);
FX_INT32 ProcessiveParseSegmentData(CJBig2_Segment *pSegment, IFX_Pause* pPause);
FX_INT32 parseSymbolDict(CJBig2_Segment *pSegment, IFX_Pause* pPause);
FX_INT32 parseTextRegion(CJBig2_Segment *pSegment);
FX_INT32 parsePatternDict(CJBig2_Segment *pSegment, IFX_Pause* pPause);
FX_INT32 parseHalftoneRegion(CJBig2_Segment *pSegment, IFX_Pause* pPause);
FX_INT32 parseGenericRegion(CJBig2_Segment *pSegment, IFX_Pause* pPause);
FX_INT32 parseGenericRefinementRegion(CJBig2_Segment *pSegment);
FX_INT32 parseTable(CJBig2_Segment *pSegment);
FX_INT32 parseRegionInfo(JBig2RegionInfo *pRI);
JBig2HuffmanCode *decodeSymbolIDHuffmanTable(CJBig2_BitStream *pStream, FX_DWORD SBNUMSYMS);
void huffman_assign_code(int* CODES, int* PREFLEN, int NTEMP);
void huffman_assign_code(JBig2HuffmanCode *SBSYMCODES, int NTEMP);
private:
CJBig2_Context *m_pGlobalContext;
FX_INT32 m_nStreamType;
CJBig2_BitStream *m_pStream;
FX_INT32 m_nState;
CJBig2_List<CJBig2_Segment> *m_pSegmentList;
CJBig2_List<JBig2PageInfo> *m_pPageInfoList;
CJBig2_Image *m_pPage;
FX_BOOL m_bBufSpecified;
FX_INT32 m_nSegmentDecoded;
IFX_Pause* m_pPause;
FX_INT32 m_PauseStep;
FXCODEC_STATUS m_ProcessiveStatus;
FX_BOOL m_bFirstPage;
CJBig2_ArithDecoder *m_pArithDecoder;
CJBig2_GRDProc *m_pGRD;
JBig2ArithCtx *m_gbContext;
CJBig2_Segment *m_pSegment;
FX_DWORD m_dwOffset;
JBig2RegionInfo m_ri;
std::list<CJBig2_CachePair>* m_pSymbolDictCache;
};
#endif
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