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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 CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
#define CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
#include <list>
#include <utility>
#include "../../../../third_party/base/nonstd_unique_ptr.h"
#include "../../../include/fpdfapi/fpdf_objects.h"
#include "../../../include/fxcodec/fx_codec_def.h"
#include "JBig2_List.h"
#include "JBig2_Page.h"
#include "JBig2_Segment.h"
class CJBig2_ArithDecoder;
class CJBig2_GRDProc;
class IFX_Pause;
// Cache is keyed by the ObjNum of a stream and an index within the stream.
using CJBig2_CacheKey = std::pair<FX_DWORD, FX_DWORD>;
// NB: CJBig2_SymbolDict* is owned.
using CJBig2_CachePair = std::pair<CJBig2_CacheKey, CJBig2_SymbolDict*>;
#define JBIG2_SUCCESS 0
#define JBIG2_FAILED -1
#define JBIG2_ERROR_TOO_SHORT -2
#define JBIG2_ERROR_FATAL -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_MIN_SEGMENT_SIZE 11
class CJBig2_Context {
public:
static CJBig2_Context* CreateContext(
CPDF_StreamAcc* pGlobalStream,
CPDF_StreamAcc* pSrcStream,
std::list<CJBig2_CachePair>* pSymbolDictCache,
IFX_Pause* pPause = NULL);
static void DestroyContext(CJBig2_Context* pContext);
int32_t getFirstPage(uint8_t* pBuf,
int32_t width,
int32_t height,
int32_t stride,
IFX_Pause* pPause);
int32_t Continue(IFX_Pause* pPause);
FXCODEC_STATUS GetProcessingStatus() { return m_ProcessingStatus; }
private:
CJBig2_Context(CPDF_StreamAcc* pGlobalStream,
CPDF_StreamAcc* pSrcStream,
std::list<CJBig2_CachePair>* pSymbolDictCache,
IFX_Pause* pPause,
bool bIsGlobal);
~CJBig2_Context();
int32_t decode_SquentialOrgnazation(IFX_Pause* pPause);
int32_t decode_EmbedOrgnazation(IFX_Pause* pPause);
int32_t decode_RandomOrgnazation_FirstPage(IFX_Pause* pPause);
int32_t decode_RandomOrgnazation(IFX_Pause* pPause);
CJBig2_Segment* findSegmentByNumber(FX_DWORD dwNumber);
CJBig2_Segment* findReferredSegmentByTypeAndIndex(CJBig2_Segment* pSegment,
uint8_t cType,
int32_t nIndex);
int32_t parseSegmentHeader(CJBig2_Segment* pSegment);
int32_t parseSegmentData(CJBig2_Segment* pSegment, IFX_Pause* pPause);
int32_t ProcessingParseSegmentData(CJBig2_Segment* pSegment,
IFX_Pause* pPause);
int32_t parseSymbolDict(CJBig2_Segment* pSegment, IFX_Pause* pPause);
int32_t parseTextRegion(CJBig2_Segment* pSegment);
int32_t parsePatternDict(CJBig2_Segment* pSegment, IFX_Pause* pPause);
int32_t parseHalftoneRegion(CJBig2_Segment* pSegment, IFX_Pause* pPause);
int32_t parseGenericRegion(CJBig2_Segment* pSegment, IFX_Pause* pPause);
int32_t parseGenericRefinementRegion(CJBig2_Segment* pSegment);
int32_t parseTable(CJBig2_Segment* pSegment);
int32_t 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;
nonstd::unique_ptr<CJBig2_BitStream> m_pStream;
CJBig2_List<CJBig2_Segment> m_SegmentList;
CJBig2_List<JBig2PageInfo> m_PageInfoList;
nonstd::unique_ptr<CJBig2_Image> m_pPage;
size_t m_nSegmentDecoded;
bool m_bInPage;
bool m_bBufSpecified;
int32_t m_PauseStep;
IFX_Pause* m_pPause;
FXCODEC_STATUS m_ProcessingStatus;
nonstd::unique_ptr<CJBig2_ArithDecoder> m_pArithDecoder;
nonstd::unique_ptr<CJBig2_GRDProc> m_pGRD;
JBig2ArithCtx* m_gbContext;
nonstd::unique_ptr<CJBig2_Segment> m_pSegment;
FX_DWORD m_dwOffset;
JBig2RegionInfo m_ri;
std::list<CJBig2_CachePair>* const m_pSymbolDictCache;
bool m_bIsGlobal;
};
#endif // CORE_SRC_FXCODEC_JBIG2_JBIG2_CONTEXT_H_
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