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 _JBIG2_CONTEXT_H_ 8 #define _JBIG2_CONTEXT_H_ 9 #include "JBig2_Module.h" 10 #include "JBig2_List.h" 11 #include "JBig2_Segment.h" 12 #include "JBig2_Page.h" 13 #include "JBig2_GeneralDecoder.h" 14 #include "../../../include/fxcodec/fx_codec_def.h" 15 #include "../../../include/fxcrt/fx_basic.h" 16 typedef enum { 17 JBIG2_OUT_OF_PAGE = 0, 18 JBIG2_IN_PAGE, 19 } JBig2State; 20 #define JBIG2_SUCCESS 0 21 #define JBIG2_FAILED -1 22 #define JBIG2_ERROR_TOO_SHORT -2 23 #define JBIG2_ERROR_FETAL -3 24 #define JBIG2_END_OF_PAGE 2 25 #define JBIG2_END_OF_FILE 3 26 #define JBIG2_ERROR_FILE_FORMAT -4 27 #define JBIG2_ERROR_STREAM_TYPE -5 28 #define JBIG2_ERROR_LIMIT -6 29 #define JBIG2_FILE_STREAM 0 30 #define JBIG2_SQUENTIAL_STREAM 1 31 #define JBIG2_RANDOM_STREAM 2 32 #define JBIG2_EMBED_STREAM 3 33 #define JBIG2_MIN_SEGMENT_SIZE 11 34 class CJBig2_Context : public CJBig2_Object 35 { 36 public: 37 38 static CJBig2_Context *CreateContext(CJBig2_Module *pModule, FX_BYTE *pGlobalData, FX_DWORD dwGlobalLength, 39 FX_BYTE *pData, FX_DWORD dwLength, FX_INT32 nStreamType, IFX_Pause* pPause = NULL); 40 41 static void DestroyContext(CJBig2_Context *pContext); 42 43 FX_INT32 getFirstPage(FX_BYTE *pBuf, FX_INT32 width, FX_INT32 height, FX_INT32 stride, IFX_Pause* pPause); 44 45 FX_INT32 getNextPage(FX_BYTE *pBuf, FX_INT32 width, FX_INT32 height, FX_INT32 stride, IFX_Pause* pPause); 46 47 FX_INT32 getFirstPage(CJBig2_Image **image, IFX_Pause* pPause); 48 49 FX_INT32 getNextPage(CJBig2_Image **image, IFX_Pause* pPause); 50 FX_INT32 Continue(IFX_Pause* pPause); 51 FXCODEC_STATUS GetProcessiveStatus() 52 { 53 return m_ProcessiveStatus; 54 }; 55 private: 56 57 CJBig2_Context(FX_BYTE *pGlobalData, FX_DWORD dwGlobalLength, 58 FX_BYTE *pData, FX_DWORD dwLength, FX_INT32 nStreamType, IFX_Pause* pPause); 59 60 ~CJBig2_Context(); 61 62 FX_INT32 decodeFile(IFX_Pause* pPause); 63 64 FX_INT32 decode_SquentialOrgnazation(IFX_Pause* pPause); 65 66 FX_INT32 decode_EmbedOrgnazation(IFX_Pause* pPause); 67 68 FX_INT32 decode_RandomOrgnazation_FirstPage(IFX_Pause* pPause); 69 70 FX_INT32 decode_RandomOrgnazation(IFX_Pause* pPause); 71 72 CJBig2_Segment *findSegmentByNumber(FX_DWORD dwNumber); 73 74 CJBig2_Segment *findReferredSegmentByTypeAndIndex(CJBig2_Segment *pSegment, FX_BYTE cType, FX_INT32 nIndex); 75 76 FX_INT32 parseSegmentHeader(CJBig2_Segment *pSegment); 77 78 FX_INT32 parseSegmentData(CJBig2_Segment *pSegment, IFX_Pause* pPause); 79 FX_INT32 ProcessiveParseSegmentData(CJBig2_Segment *pSegment, IFX_Pause* pPause); 80 81 FX_INT32 parseSymbolDict(CJBig2_Segment *pSegment, IFX_Pause* pPause); 82 83 FX_INT32 parseTextRegion(CJBig2_Segment *pSegment); 84 85 FX_INT32 parsePatternDict(CJBig2_Segment *pSegment, IFX_Pause* pPause); 86 87 FX_INT32 parseHalftoneRegion(CJBig2_Segment *pSegment, IFX_Pause* pPause); 88 89 FX_INT32 parseGenericRegion(CJBig2_Segment *pSegment, IFX_Pause* pPause); 90 91 FX_INT32 parseGenericRefinementRegion(CJBig2_Segment *pSegment); 92 93 FX_INT32 parseTable(CJBig2_Segment *pSegment); 94 95 FX_INT32 parseRegionInfo(JBig2RegionInfo *pRI); 96 97 98 99 JBig2HuffmanCode *decodeSymbolIDHuffmanTable(CJBig2_BitStream *pStream, FX_DWORD SBNUMSYMS); 100 101 void huffman_assign_code(int* CODES, int* PREFLEN, int NTEMP); 102 103 void huffman_assign_code(JBig2HuffmanCode *SBSYMCODES, int NTEMP); 104 105 private: 106 107 CJBig2_Context *m_pGlobalContext; 108 109 FX_INT32 m_nStreamType; 110 111 CJBig2_BitStream *m_pStream; 112 113 FX_INT32 m_nState; 114 115 CJBig2_List<CJBig2_Segment> *m_pSegmentList; 116 117 CJBig2_List<JBig2PageInfo> *m_pPageInfoList; 118 119 CJBig2_Image *m_pPage; 120 121 FX_BOOL m_bBufSpecified; 122 123 FX_INT32 m_nSegmentDecoded; 124 IFX_Pause* m_pPause; 125 FX_INT32 m_PauseStep; 126 FXCODEC_STATUS m_ProcessiveStatus; 127 FX_BOOL m_bFirstPage; 128 CJBig2_ArithDecoder *m_pArithDecoder; 129 CJBig2_GRDProc *m_pGRD; 130 JBig2ArithCtx *m_gbContext; 131 CJBig2_Segment *m_pSegment; 132 FX_DWORD m_dwOffset; 133 JBig2RegionInfo m_ri; 134 }; 135 #endif 136
