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// Compress/BZip2Decoder.h
#ifndef __COMPRESS_BZIP2_DECODER_H
#define __COMPRESS_BZIP2_DECODER_H
#include "../../Common/MyCom.h"
#ifndef _7ZIP_ST
#include "../../Windows/Synchronization.h"
#include "../../Windows/Thread.h"
#endif
#include "../ICoder.h"
#include "../Common/InBuffer.h"
#include "../Common/OutBuffer.h"
#include "BitmDecoder.h"
#include "BZip2Const.h"
#include "BZip2Crc.h"
#include "HuffmanDecoder.h"
namespace NCompress {
namespace NBZip2 {
bool IsEndSig(const Byte *p) throw();
bool IsBlockSig(const Byte *p) throw();
typedef NCompress::NHuffman::CDecoder<kMaxHuffmanLen, kMaxAlphaSize> CHuffmanDecoder;
class CDecoder;
struct CState
{
UInt32 *Counters;
#ifndef _7ZIP_ST
CDecoder *Decoder;
NWindows::CThread Thread;
bool m_OptimizeNumTables;
NWindows::NSynchronization::CAutoResetEvent StreamWasFinishedEvent;
NWindows::NSynchronization::CAutoResetEvent WaitingWasStartedEvent;
// it's not member of this thread. We just need one event per thread
NWindows::NSynchronization::CAutoResetEvent CanWriteEvent;
Byte MtPad[1 << 8]; // It's pad for Multi-Threading. Must be >= Cache_Line_Size.
HRESULT Create();
void FinishStream();
void ThreadFunc();
#endif
CState(): Counters(0) {}
~CState() { Free(); }
bool Alloc();
void Free();
};
struct CBlockProps
{
UInt32 blockSize;
UInt32 origPtr;
bool randMode;
CBlockProps(): blockSize(0), origPtr(0), randMode(false) {}
};
struct CBase
{
CMyComPtr<ISequentialInStream> InStreamRef;
NBitm::CDecoder<CInBuffer> BitDecoder;
private:
Byte m_Selectors[kNumSelectorsMax];
CHuffmanDecoder m_HuffmanDecoders[kNumTablesMax];
public:
UInt64 NumBlocks;
CBase(): NumBlocks(0) {}
UInt32 ReadBits(unsigned numBits);
unsigned ReadBit();
void InitNumBlocks() { NumBlocks = 0; }
/*
ReadBlock() props->randMode:
in: need read randMode bit,
out: randMode status
*/
HRESULT ReadBlock(UInt32 *charCounters, UInt32 blockSizeMax, CBlockProps *props);
};
class CDecoder :
public ICompressCoder,
#ifndef _7ZIP_ST
public ICompressSetCoderMt,
#endif
public CMyUnknownImp
{
public:
COutBuffer m_OutStream;
Byte MtPad[1 << 8]; // It's pad for Multi-Threading. Must be >= Cache_Line_Size.
CBase Base;
UInt64 _inStart;
private:
bool _needInStreamInit;
Byte ReadByte();
HRESULT DecodeFile(ICompressProgressInfo *progress);
HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream, ICompressProgressInfo *progress);
class CDecoderFlusher
{
CDecoder *_decoder;
public:
bool NeedFlush;
CDecoderFlusher(CDecoder *decoder): _decoder(decoder), NeedFlush(true) {}
~CDecoderFlusher()
{
if (NeedFlush)
_decoder->Flush();
}
};
public:
CBZip2CombinedCrc CombinedCrc;
ICompressProgressInfo *Progress;
#ifndef _7ZIP_ST
CState *m_States;
UInt32 m_NumThreadsPrev;
NWindows::NSynchronization::CManualResetEvent CanProcessEvent;
NWindows::NSynchronization::CCriticalSection CS;
UInt32 NumThreads;
bool MtMode;
UInt32 NextBlockIndex;
bool CloseThreads;
bool StreamWasFinished1;
bool StreamWasFinished2;
NWindows::NSynchronization::CManualResetEvent CanStartWaitingEvent;
HRESULT Result1;
HRESULT Result2;
UInt32 BlockSizeMax;
~CDecoder();
HRESULT Create();
void Free();
#else
CState m_States[1];
#endif
bool IsBz;
bool BzWasFinished; // bzip stream was finished with end signature
bool CrcError; // it can CRC error of block or CRC error of whole stream.
CDecoder();
HRESULT SetRatioProgress(UInt64 packSize);
HRESULT ReadSignature(UInt32 &crc);
HRESULT Flush() { return m_OutStream.Flush(); }
MY_QUERYINTERFACE_BEGIN2(ICompressCoder)
#ifndef _7ZIP_ST
MY_QUERYINTERFACE_ENTRY(ICompressSetCoderMt)
#endif
MY_QUERYINTERFACE_END
MY_ADDREF_RELEASE
STDMETHOD(Code)(ISequentialInStream *inStream, ISequentialOutStream *outStream,
const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
STDMETHOD(SetInStream)(ISequentialInStream *inStream);
STDMETHOD(ReleaseInStream)();
HRESULT CodeResume(ISequentialOutStream *outStream, ICompressProgressInfo *progress);
UInt64 GetStreamSize() const { return Base.BitDecoder.GetStreamSize(); }
UInt64 GetInputProcessedSize() const { return Base.BitDecoder.GetProcessedSize(); }
void InitNumBlocks() { Base.InitNumBlocks(); }
UInt64 GetNumBlocks() const { return Base.NumBlocks; }
#ifndef _7ZIP_ST
STDMETHOD(SetNumberOfThreads)(UInt32 numThreads);
#endif
};
class CNsisDecoder :
public ISequentialInStream,
public ICompressSetInStream,
public ICompressSetOutStreamSize,
public CMyUnknownImp
{
CBase Base;
CState m_State;
int _nsisState;
UInt32 _tPos;
unsigned _prevByte;
unsigned _repRem;
unsigned _numReps;
UInt32 _blockSize;
public:
MY_QUERYINTERFACE_BEGIN2(ISequentialInStream)
MY_QUERYINTERFACE_ENTRY(ICompressSetInStream)
MY_QUERYINTERFACE_ENTRY(ICompressSetOutStreamSize)
MY_QUERYINTERFACE_END
MY_ADDREF_RELEASE
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
STDMETHOD(SetInStream)(ISequentialInStream *inStream);
STDMETHOD(ReleaseInStream)();
STDMETHOD(SetOutStreamSize)(const UInt64 *outSize);
};
}}
#endif
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