| // 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" |
| 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, 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, 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; |
| }; |
| #endif |