Simone
d074cc7c07
Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
// Rar2Decoder.h
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// According to unRAR license, this code may not be used to develop
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// a program that creates RAR archives
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#ifndef ZIP7_INC_COMPRESS_RAR2_DECODER_H
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#define ZIP7_INC_COMPRESS_RAR2_DECODER_H
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#include "../../Common/MyCom.h"
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#include "../ICoder.h"
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#include "../Common/InBuffer.h"
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#include "BitmDecoder.h"
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#include "HuffmanDecoder.h"
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#include "LzOutWindow.h"
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namespace NCompress {
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namespace NRar2 {
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const unsigned kNumReps = 4;
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const unsigned kDistTableSize = 48;
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const unsigned kNumLen2Symbols = 8;
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const unsigned kLenTableSize = 28;
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const unsigned kMainTableSize = 256 + 2 + kNumReps + kNumLen2Symbols + kLenTableSize;
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const unsigned kHeapTablesSizesSum = kMainTableSize + kDistTableSize + kLenTableSize;
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const unsigned k_MM_TableSize = 256 + 1;
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const unsigned k_MM_NumChanelsMax = 4;
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const unsigned k_MM_TablesSizesSum = k_MM_TableSize * k_MM_NumChanelsMax;
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const unsigned kMaxTableSize = k_MM_TablesSizesSum;
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namespace NMultimedia {
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struct CFilter
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{
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int K1,K2,K3,K4,K5;
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int D1,D2,D3,D4;
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int LastDelta;
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UInt32 Dif[11];
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UInt32 ByteCount;
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int LastChar;
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void Init() { memset(this, 0, sizeof(*this)); }
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Byte Decode(int &channelDelta, Byte delta);
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};
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struct CFilter2
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{
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CFilter m_Filters[k_MM_NumChanelsMax];
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int m_ChannelDelta;
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unsigned CurrentChannel;
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void Init() { memset(this, 0, sizeof(*this)); }
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Byte Decode(Byte delta)
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{
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return m_Filters[CurrentChannel].Decode(m_ChannelDelta, delta);
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}
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};
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}
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typedef NBitm::CDecoder<CInBuffer> CBitDecoder;
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const unsigned kNumHufBits = 15;
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Z7_CLASS_IMP_NOQIB_2(
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CDecoder
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, ICompressCoder
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, ICompressSetDecoderProperties2
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)
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bool _isSolid;
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bool _solidAllowed;
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bool m_TablesOK;
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bool m_AudioMode;
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CLzOutWindow m_OutWindowStream;
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CBitDecoder m_InBitStream;
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UInt32 m_RepDistPtr;
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UInt32 m_RepDists[kNumReps];
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UInt32 m_LastLength;
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unsigned m_NumChannels;
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NHuffman::CDecoder<kNumHufBits, kMainTableSize, 9> m_MainDecoder;
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NHuffman::CDecoder256<kNumHufBits, kDistTableSize, 7> m_DistDecoder;
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NHuffman::CDecoder256<kNumHufBits, kLenTableSize, 7> m_LenDecoder;
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NHuffman::CDecoder<kNumHufBits, k_MM_TableSize, 9> m_MMDecoders[k_MM_NumChanelsMax];
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UInt64 m_PackSize;
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NMultimedia::CFilter2 m_MmFilter;
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Byte m_LastLevels[kMaxTableSize];
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void InitStructures();
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UInt32 ReadBits(unsigned numBits);
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bool ReadTables();
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bool ReadLastTables();
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bool DecodeMm(UInt32 pos);
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bool DecodeLz(Int32 pos);
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HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
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const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
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public:
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CDecoder();
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};
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}}
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#endif
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