1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FXCODEC_JBIG2_JBIG2_CONTEXT_H_ 8 #define CORE_FXCODEC_JBIG2_JBIG2_CONTEXT_H_ 9 10 #include <list> 11 #include <memory> 12 #include <utility> 13 #include <vector> 14 15 #include "core/fpdfapi/parser/cpdf_object.h" 16 #include "core/fxcodec/fx_codec_def.h" 17 #include "core/fxcodec/jbig2/JBig2_Page.h" 18 #include "core/fxcodec/jbig2/JBig2_Segment.h" 19 20 class CJBig2_ArithDecoder; 21 class CJBig2_GRDProc; 22 class CPDF_StreamAcc; 23 class IFX_Pause; 24 25 // Cache is keyed by the ObjNum of a stream and an index within the stream. 26 using CJBig2_CacheKey = std::pair<uint32_t, uint32_t>; 27 using CJBig2_CachePair = 28 std::pair<CJBig2_CacheKey, std::unique_ptr<CJBig2_SymbolDict>>; 29 30 #define JBIG2_SUCCESS 0 31 #define JBIG2_FAILED -1 32 #define JBIG2_ERROR_TOO_SHORT -2 33 #define JBIG2_ERROR_FATAL -3 34 #define JBIG2_END_OF_PAGE 2 35 #define JBIG2_END_OF_FILE 3 36 #define JBIG2_ERROR_FILE_FORMAT -4 37 #define JBIG2_ERROR_STREAM_TYPE -5 38 #define JBIG2_ERROR_LIMIT -6 39 #define JBIG2_MIN_SEGMENT_SIZE 11 40 41 class CJBig2_Context { 42 public: 43 CJBig2_Context(CPDF_StreamAcc* pGlobalStream, 44 CPDF_StreamAcc* pSrcStream, 45 std::list<CJBig2_CachePair>* pSymbolDictCache, 46 IFX_Pause* pPause, 47 bool bIsGlobal); 48 ~CJBig2_Context(); 49 50 int32_t getFirstPage(uint8_t* pBuf, 51 int32_t width, 52 int32_t height, 53 int32_t stride, 54 IFX_Pause* pPause); 55 56 int32_t Continue(IFX_Pause* pPause); 57 FXCODEC_STATUS GetProcessingStatus() { return m_ProcessingStatus; } 58 59 private: 60 int32_t decode_SquentialOrgnazation(IFX_Pause* pPause); 61 int32_t decode_EmbedOrgnazation(IFX_Pause* pPause); 62 int32_t decode_RandomOrgnazation_FirstPage(IFX_Pause* pPause); 63 int32_t decode_RandomOrgnazation(IFX_Pause* pPause); 64 65 CJBig2_Segment* findSegmentByNumber(uint32_t dwNumber); 66 CJBig2_Segment* findReferredSegmentByTypeAndIndex(CJBig2_Segment* pSegment, 67 uint8_t cType, 68 int32_t nIndex); 69 70 int32_t parseSegmentHeader(CJBig2_Segment* pSegment); 71 int32_t parseSegmentData(CJBig2_Segment* pSegment, IFX_Pause* pPause); 72 int32_t ProcessingParseSegmentData(CJBig2_Segment* pSegment, 73 IFX_Pause* pPause); 74 int32_t parseSymbolDict(CJBig2_Segment* pSegment, IFX_Pause* pPause); 75 int32_t parseTextRegion(CJBig2_Segment* pSegment); 76 int32_t parsePatternDict(CJBig2_Segment* pSegment, IFX_Pause* pPause); 77 int32_t parseHalftoneRegion(CJBig2_Segment* pSegment, IFX_Pause* pPause); 78 int32_t parseGenericRegion(CJBig2_Segment* pSegment, IFX_Pause* pPause); 79 int32_t parseGenericRefinementRegion(CJBig2_Segment* pSegment); 80 int32_t parseTable(CJBig2_Segment* pSegment); 81 int32_t parseRegionInfo(JBig2RegionInfo* pRI); 82 83 JBig2HuffmanCode* decodeSymbolIDHuffmanTable(CJBig2_BitStream* pStream, 84 uint32_t SBNUMSYMS); 85 86 void huffman_assign_code(int* CODES, int* PREFLEN, int NTEMP); 87 void huffman_assign_code(JBig2HuffmanCode* SBSYMCODES, int NTEMP); 88 89 std::unique_ptr<CJBig2_Context> m_pGlobalContext; 90 std::unique_ptr<CJBig2_BitStream> m_pStream; 91 std::vector<std::unique_ptr<CJBig2_Segment>> m_SegmentList; 92 std::vector<std::unique_ptr<JBig2PageInfo>> m_PageInfoList; 93 std::unique_ptr<CJBig2_Image> m_pPage; 94 size_t m_nSegmentDecoded; 95 bool m_bInPage; 96 bool m_bBufSpecified; 97 int32_t m_PauseStep; 98 IFX_Pause* const m_pPause; 99 FXCODEC_STATUS m_ProcessingStatus; 100 std::vector<JBig2ArithCtx> m_gbContext; 101 std::unique_ptr<CJBig2_ArithDecoder> m_pArithDecoder; 102 std::unique_ptr<CJBig2_GRDProc> m_pGRD; 103 std::unique_ptr<CJBig2_Segment> m_pSegment; 104 uint32_t m_dwOffset; 105 JBig2RegionInfo m_ri; 106 std::list<CJBig2_CachePair>* const m_pSymbolDictCache; 107 bool m_bIsGlobal; 108 }; 109 110 #endif // CORE_FXCODEC_JBIG2_JBIG2_CONTEXT_H_ 111
