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91 lines
2.1 KiB
C++
Executable File
91 lines
2.1 KiB
C++
Executable File
// Compress/BZip2/Decoder.h
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#ifndef __COMPRESS_BZIP2_DECODER_H
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#define __COMPRESS_BZIP2_DECODER_H
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#include "../../ICoder.h"
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#include "../../../Common/MyCom.h"
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#include "../../Common/MSBFDecoder.h"
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#include "../../Common/InBuffer.h"
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#include "../../Common/OutBuffer.h"
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#include "../Huffman/HuffmanDecoder.h"
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#include "BZip2Const.h"
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namespace NCompress {
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namespace NBZip2 {
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typedef NCompress::NHuffman::CDecoder<kMaxHuffmanLen, kMaxAlphaSize> CHuffmanDecoder;
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struct CState
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{
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UInt32 *tt;
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bool BlockRandomised;
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UInt32 OrigPtr;
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UInt32 BlockSize;
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UInt32 CharCounters[256];
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Byte m_Selectors[kNumSelectorsMax];
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UInt32 StoredCRC;
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CState(): tt(0) {}
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~CState();
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bool Alloc();
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HRESULT DecodeBlock(COutBuffer &m_OutStream);
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};
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class CDecoder :
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public ICompressCoder,
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public ICompressGetInStreamProcessedSize,
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public CMyUnknownImp
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{
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NStream::NMSBF::CDecoder<CInBuffer> m_InStream;
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COutBuffer m_OutStream;
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CHuffmanDecoder m_HuffmanDecoders[kNumTablesMax];
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CState m_State;
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UInt32 ReadBits(int numBits);
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Byte ReadByte();
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bool ReadBit();
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UInt32 ReadCRC();
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HRESULT ReadBlock(UInt32 blockSizeMax, CState &state);
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HRESULT PrepareBlock(CState &state);
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HRESULT DecodeFile(bool &isBZ, ICompressProgressInfo *progress);
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HRESULT CodeReal(ISequentialInStream *inStream,
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ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
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ICompressProgressInfo *progress);
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class CDecoderFlusher
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{
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CDecoder *_decoder;
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public:
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bool NeedFlush;
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CDecoderFlusher(CDecoder *decoder): _decoder(decoder), NeedFlush(true) {}
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~CDecoderFlusher()
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{
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if (NeedFlush)
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_decoder->Flush();
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_decoder->ReleaseStreams();
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}
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};
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public:
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HRESULT Flush() { return m_OutStream.Flush(); }
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void ReleaseStreams()
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{
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m_InStream.ReleaseStream();
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m_OutStream.ReleaseStream();
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}
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MY_UNKNOWN_IMP1(ICompressGetInStreamProcessedSize)
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STDMETHOD(Code)(ISequentialInStream *inStream,
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ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
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ICompressProgressInfo *progress);
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STDMETHOD(GetInStreamProcessedSize)(UInt64 *value);
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};
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}}
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#endif
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