4.63

CPP/7zip/Compress/BZip2Decoder.h

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+// Compress/BZip2Decoder.h
+
+#ifndef __COMPRESS_BZIP2_DECODER_H
+#define __COMPRESS_BZIP2_DECODER_H
+
+#include "../../Common/MyCom.h"
+
+#ifdef COMPRESS_BZIP2_MT
+#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 {
+
+typedef NCompress::NHuffman::CDecoder<kMaxHuffmanLen, kMaxAlphaSize> CHuffmanDecoder;
+
+class CDecoder;
+
+struct CState
+{
+  UInt32 *Counters;
+
+  #ifdef COMPRESS_BZIP2_MT
+
+  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();
+};
+
+class CDecoder :
+  public ICompressCoder,
+  #ifdef COMPRESS_BZIP2_MT
+  public ICompressSetCoderMt,
+  #endif
+  public ICompressGetInStreamProcessedSize,
+  public CMyUnknownImp
+{
+public:
+  COutBuffer m_OutStream;
+  Byte MtPad[1 << 8]; // It's pad for Multi-Threading. Must be >= Cache_Line_Size.
+  NBitm::CDecoder<CInBuffer> m_InStream;
+  Byte m_Selectors[kNumSelectorsMax];
+  CHuffmanDecoder m_HuffmanDecoders[kNumTablesMax];
+private:
+
+  UInt32 m_NumThreadsPrev;
+
+  UInt32 ReadBits(int numBits);
+  Byte ReadByte();
+  bool ReadBit();
+  UInt32 ReadCrc();
+  HRESULT PrepareBlock(CState &state);
+  HRESULT DecodeFile(bool &isBZ, ICompressProgressInfo *progress);
+  HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
+      const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
+  class CDecoderFlusher
+  {
+    CDecoder *_decoder;
+  public:
+    bool NeedFlush;
+    CDecoderFlusher(CDecoder *decoder): _decoder(decoder), NeedFlush(true) {}
+    ~CDecoderFlusher()
+    {
+      if (NeedFlush)
+        _decoder->Flush();
+      _decoder->ReleaseStreams();
+    }
+  };
+
+public:
+  CBZip2CombinedCrc CombinedCrc;
+
+  #ifdef COMPRESS_BZIP2_MT
+  ICompressProgressInfo *Progress;
+  CState *m_States;
+
+  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();
+  ~CDecoder();
+  HRESULT Create();
+  void Free();
+
+  #else
+  CState m_States[1];
+  #endif
+
+  HRESULT ReadSignatures(bool &wasFinished, UInt32 &crc);
+
+
+  HRESULT Flush() { return m_OutStream.Flush(); }
+  void ReleaseStreams()
+  {
+    m_InStream.ReleaseStream();
+    m_OutStream.ReleaseStream();
+  }
+
+  #ifdef COMPRESS_BZIP2_MT
+  MY_UNKNOWN_IMP2(ICompressSetCoderMt, ICompressGetInStreamProcessedSize)
+  #else
+  MY_UNKNOWN_IMP1(ICompressGetInStreamProcessedSize)
+  #endif
+
+  
+  STDMETHOD(Code)(ISequentialInStream *inStream, ISequentialOutStream *outStream,
+      const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
+
+  STDMETHOD(GetInStreamProcessedSize)(UInt64 *value);
+
+  #ifdef COMPRESS_BZIP2_MT
+  STDMETHOD(SetNumberOfThreads)(UInt32 numThreads);
+  #endif
+};
+
+}}
+
+#endif