Add 7zip SDK C# files
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de4dot
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a27bd9339e
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// LzOutWindow.cs
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namespace SevenZip.Compression.LZ
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{
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public class OutWindow
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{
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byte[] _buffer = null;
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uint _pos;
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uint _windowSize = 0;
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uint _streamPos;
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System.IO.Stream _stream;
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public uint TrainSize = 0;
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public void Create(uint windowSize)
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{
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if (_windowSize != windowSize)
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{
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// System.GC.Collect();
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_buffer = new byte[windowSize];
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}
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_windowSize = windowSize;
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_pos = 0;
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_streamPos = 0;
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}
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public void Init(System.IO.Stream stream, bool solid)
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{
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ReleaseStream();
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_stream = stream;
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if (!solid)
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{
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_streamPos = 0;
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_pos = 0;
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TrainSize = 0;
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}
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}
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public bool Train(System.IO.Stream stream)
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{
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long len = stream.Length;
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uint size = (len < _windowSize) ? (uint)len : _windowSize;
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TrainSize = size;
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stream.Position = len - size;
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_streamPos = _pos = 0;
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while (size > 0)
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{
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uint curSize = _windowSize - _pos;
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if (size < curSize)
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curSize = size;
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int numReadBytes = stream.Read(_buffer, (int)_pos, (int)curSize);
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if (numReadBytes == 0)
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return false;
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size -= (uint)numReadBytes;
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_pos += (uint)numReadBytes;
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_streamPos += (uint)numReadBytes;
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if (_pos == _windowSize)
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_streamPos = _pos = 0;
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}
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return true;
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}
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public void ReleaseStream()
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{
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Flush();
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_stream = null;
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}
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public void Flush()
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{
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uint size = _pos - _streamPos;
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if (size == 0)
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return;
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_stream.Write(_buffer, (int)_streamPos, (int)size);
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if (_pos >= _windowSize)
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_pos = 0;
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_streamPos = _pos;
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}
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public void CopyBlock(uint distance, uint len)
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{
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uint pos = _pos - distance - 1;
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if (pos >= _windowSize)
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pos += _windowSize;
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for (; len > 0; len--)
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{
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if (pos >= _windowSize)
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pos = 0;
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_buffer[_pos++] = _buffer[pos++];
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if (_pos >= _windowSize)
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Flush();
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}
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}
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public void PutByte(byte b)
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{
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_buffer[_pos++] = b;
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if (_pos >= _windowSize)
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Flush();
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}
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public byte GetByte(uint distance)
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{
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uint pos = _pos - distance - 1;
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if (pos >= _windowSize)
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pos += _windowSize;
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return _buffer[pos];
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}
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}
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}
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@ -0,0 +1,76 @@
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// LzmaBase.cs
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namespace SevenZip.Compression.LZMA
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{
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internal abstract class Base
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{
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public const uint kNumRepDistances = 4;
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public const uint kNumStates = 12;
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// static byte []kLiteralNextStates = {0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5};
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// static byte []kMatchNextStates = {7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10};
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// static byte []kRepNextStates = {8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11};
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// static byte []kShortRepNextStates = {9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11};
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public struct State
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{
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public uint Index;
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public void Init() { Index = 0; }
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public void UpdateChar()
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{
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if (Index < 4) Index = 0;
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else if (Index < 10) Index -= 3;
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else Index -= 6;
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}
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public void UpdateMatch() { Index = (uint)(Index < 7 ? 7 : 10); }
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public void UpdateRep() { Index = (uint)(Index < 7 ? 8 : 11); }
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public void UpdateShortRep() { Index = (uint)(Index < 7 ? 9 : 11); }
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public bool IsCharState() { return Index < 7; }
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}
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public const int kNumPosSlotBits = 6;
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public const int kDicLogSizeMin = 0;
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// public const int kDicLogSizeMax = 30;
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// public const uint kDistTableSizeMax = kDicLogSizeMax * 2;
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public const int kNumLenToPosStatesBits = 2; // it's for speed optimization
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public const uint kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
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public const uint kMatchMinLen = 2;
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public static uint GetLenToPosState(uint len)
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{
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len -= kMatchMinLen;
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if (len < kNumLenToPosStates)
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return len;
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return (uint)(kNumLenToPosStates - 1);
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}
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public const int kNumAlignBits = 4;
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public const uint kAlignTableSize = 1 << kNumAlignBits;
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public const uint kAlignMask = (kAlignTableSize - 1);
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public const uint kStartPosModelIndex = 4;
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public const uint kEndPosModelIndex = 14;
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public const uint kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
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public const uint kNumFullDistances = 1 << ((int)kEndPosModelIndex / 2);
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public const uint kNumLitPosStatesBitsEncodingMax = 4;
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public const uint kNumLitContextBitsMax = 8;
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public const int kNumPosStatesBitsMax = 4;
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public const uint kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
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public const int kNumPosStatesBitsEncodingMax = 4;
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public const uint kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
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public const int kNumLowLenBits = 3;
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public const int kNumMidLenBits = 3;
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public const int kNumHighLenBits = 8;
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public const uint kNumLowLenSymbols = 1 << kNumLowLenBits;
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public const uint kNumMidLenSymbols = 1 << kNumMidLenBits;
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public const uint kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols +
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(1 << kNumHighLenBits);
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public const uint kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
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}
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}
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@ -0,0 +1,398 @@
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// LzmaDecoder.cs
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using System;
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namespace SevenZip.Compression.LZMA
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{
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using RangeCoder;
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public class Decoder : ICoder, ISetDecoderProperties // ,System.IO.Stream
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{
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class LenDecoder
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{
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BitDecoder m_Choice = new BitDecoder();
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BitDecoder m_Choice2 = new BitDecoder();
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BitTreeDecoder[] m_LowCoder = new BitTreeDecoder[Base.kNumPosStatesMax];
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BitTreeDecoder[] m_MidCoder = new BitTreeDecoder[Base.kNumPosStatesMax];
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BitTreeDecoder m_HighCoder = new BitTreeDecoder(Base.kNumHighLenBits);
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uint m_NumPosStates = 0;
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public void Create(uint numPosStates)
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{
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for (uint posState = m_NumPosStates; posState < numPosStates; posState++)
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{
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m_LowCoder[posState] = new BitTreeDecoder(Base.kNumLowLenBits);
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m_MidCoder[posState] = new BitTreeDecoder(Base.kNumMidLenBits);
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}
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m_NumPosStates = numPosStates;
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}
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public void Init()
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{
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m_Choice.Init();
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for (uint posState = 0; posState < m_NumPosStates; posState++)
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{
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m_LowCoder[posState].Init();
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m_MidCoder[posState].Init();
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}
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m_Choice2.Init();
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m_HighCoder.Init();
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}
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public uint Decode(RangeCoder.Decoder rangeDecoder, uint posState)
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{
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if (m_Choice.Decode(rangeDecoder) == 0)
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return m_LowCoder[posState].Decode(rangeDecoder);
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else
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{
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uint symbol = Base.kNumLowLenSymbols;
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if (m_Choice2.Decode(rangeDecoder) == 0)
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symbol += m_MidCoder[posState].Decode(rangeDecoder);
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else
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{
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symbol += Base.kNumMidLenSymbols;
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symbol += m_HighCoder.Decode(rangeDecoder);
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}
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return symbol;
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}
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}
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}
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class LiteralDecoder
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{
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struct Decoder2
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{
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BitDecoder[] m_Decoders;
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public void Create() { m_Decoders = new BitDecoder[0x300]; }
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public void Init() { for (int i = 0; i < 0x300; i++) m_Decoders[i].Init(); }
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public byte DecodeNormal(RangeCoder.Decoder rangeDecoder)
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{
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uint symbol = 1;
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do
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symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
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while (symbol < 0x100);
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return (byte)symbol;
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}
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public byte DecodeWithMatchByte(RangeCoder.Decoder rangeDecoder, byte matchByte)
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{
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uint symbol = 1;
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do
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{
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uint matchBit = (uint)(matchByte >> 7) & 1;
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matchByte <<= 1;
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uint bit = m_Decoders[((1 + matchBit) << 8) + symbol].Decode(rangeDecoder);
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symbol = (symbol << 1) | bit;
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if (matchBit != bit)
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{
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while (symbol < 0x100)
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symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
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break;
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}
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}
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while (symbol < 0x100);
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return (byte)symbol;
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}
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}
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Decoder2[] m_Coders;
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int m_NumPrevBits;
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int m_NumPosBits;
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uint m_PosMask;
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public void Create(int numPosBits, int numPrevBits)
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{
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if (m_Coders != null && m_NumPrevBits == numPrevBits &&
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m_NumPosBits == numPosBits)
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return;
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m_NumPosBits = numPosBits;
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m_PosMask = ((uint)1 << numPosBits) - 1;
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m_NumPrevBits = numPrevBits;
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uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
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m_Coders = new Decoder2[numStates];
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for (uint i = 0; i < numStates; i++)
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m_Coders[i].Create();
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}
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public void Init()
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{
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uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
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for (uint i = 0; i < numStates; i++)
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m_Coders[i].Init();
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}
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uint GetState(uint pos, byte prevByte)
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{ return ((pos & m_PosMask) << m_NumPrevBits) + (uint)(prevByte >> (8 - m_NumPrevBits)); }
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public byte DecodeNormal(RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte)
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{ return m_Coders[GetState(pos, prevByte)].DecodeNormal(rangeDecoder); }
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public byte DecodeWithMatchByte(RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte, byte matchByte)
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{ return m_Coders[GetState(pos, prevByte)].DecodeWithMatchByte(rangeDecoder, matchByte); }
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};
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LZ.OutWindow m_OutWindow = new LZ.OutWindow();
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RangeCoder.Decoder m_RangeDecoder = new RangeCoder.Decoder();
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BitDecoder[] m_IsMatchDecoders = new BitDecoder[Base.kNumStates << Base.kNumPosStatesBitsMax];
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BitDecoder[] m_IsRepDecoders = new BitDecoder[Base.kNumStates];
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BitDecoder[] m_IsRepG0Decoders = new BitDecoder[Base.kNumStates];
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BitDecoder[] m_IsRepG1Decoders = new BitDecoder[Base.kNumStates];
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BitDecoder[] m_IsRepG2Decoders = new BitDecoder[Base.kNumStates];
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BitDecoder[] m_IsRep0LongDecoders = new BitDecoder[Base.kNumStates << Base.kNumPosStatesBitsMax];
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BitTreeDecoder[] m_PosSlotDecoder = new BitTreeDecoder[Base.kNumLenToPosStates];
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BitDecoder[] m_PosDecoders = new BitDecoder[Base.kNumFullDistances - Base.kEndPosModelIndex];
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BitTreeDecoder m_PosAlignDecoder = new BitTreeDecoder(Base.kNumAlignBits);
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LenDecoder m_LenDecoder = new LenDecoder();
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LenDecoder m_RepLenDecoder = new LenDecoder();
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LiteralDecoder m_LiteralDecoder = new LiteralDecoder();
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uint m_DictionarySize;
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uint m_DictionarySizeCheck;
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uint m_PosStateMask;
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public Decoder()
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{
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m_DictionarySize = 0xFFFFFFFF;
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for (int i = 0; i < Base.kNumLenToPosStates; i++)
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m_PosSlotDecoder[i] = new BitTreeDecoder(Base.kNumPosSlotBits);
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}
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void SetDictionarySize(uint dictionarySize)
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{
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if (m_DictionarySize != dictionarySize)
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{
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m_DictionarySize = dictionarySize;
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m_DictionarySizeCheck = Math.Max(m_DictionarySize, 1);
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uint blockSize = Math.Max(m_DictionarySizeCheck, (1 << 12));
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m_OutWindow.Create(blockSize);
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}
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}
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void SetLiteralProperties(int lp, int lc)
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{
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if (lp > 8)
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throw new InvalidParamException();
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if (lc > 8)
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throw new InvalidParamException();
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m_LiteralDecoder.Create(lp, lc);
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}
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void SetPosBitsProperties(int pb)
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{
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if (pb > Base.kNumPosStatesBitsMax)
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throw new InvalidParamException();
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uint numPosStates = (uint)1 << pb;
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m_LenDecoder.Create(numPosStates);
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m_RepLenDecoder.Create(numPosStates);
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m_PosStateMask = numPosStates - 1;
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}
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bool _solid = false;
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void Init(System.IO.Stream inStream, System.IO.Stream outStream)
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{
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m_RangeDecoder.Init(inStream);
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m_OutWindow.Init(outStream, _solid);
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uint i;
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for (i = 0; i < Base.kNumStates; i++)
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{
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for (uint j = 0; j <= m_PosStateMask; j++)
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{
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uint index = (i << Base.kNumPosStatesBitsMax) + j;
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m_IsMatchDecoders[index].Init();
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m_IsRep0LongDecoders[index].Init();
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}
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m_IsRepDecoders[i].Init();
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m_IsRepG0Decoders[i].Init();
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m_IsRepG1Decoders[i].Init();
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m_IsRepG2Decoders[i].Init();
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}
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m_LiteralDecoder.Init();
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for (i = 0; i < Base.kNumLenToPosStates; i++)
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m_PosSlotDecoder[i].Init();
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// m_PosSpecDecoder.Init();
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for (i = 0; i < Base.kNumFullDistances - Base.kEndPosModelIndex; i++)
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m_PosDecoders[i].Init();
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m_LenDecoder.Init();
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m_RepLenDecoder.Init();
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m_PosAlignDecoder.Init();
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}
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public void Code(System.IO.Stream inStream, System.IO.Stream outStream,
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Int64 inSize, Int64 outSize, ICodeProgress progress)
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{
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Init(inStream, outStream);
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Base.State state = new Base.State();
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state.Init();
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uint rep0 = 0, rep1 = 0, rep2 = 0, rep3 = 0;
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UInt64 nowPos64 = 0;
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UInt64 outSize64 = (UInt64)outSize;
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if (nowPos64 < outSize64)
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{
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if (m_IsMatchDecoders[state.Index << Base.kNumPosStatesBitsMax].Decode(m_RangeDecoder) != 0)
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throw new DataErrorException();
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state.UpdateChar();
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byte b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, 0, 0);
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m_OutWindow.PutByte(b);
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nowPos64++;
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}
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while (nowPos64 < outSize64)
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{
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// UInt64 next = Math.Min(nowPos64 + (1 << 18), outSize64);
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// while(nowPos64 < next)
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{
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uint posState = (uint)nowPos64 & m_PosStateMask;
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if (m_IsMatchDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
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{
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byte b;
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byte prevByte = m_OutWindow.GetByte(0);
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if (!state.IsCharState())
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b = m_LiteralDecoder.DecodeWithMatchByte(m_RangeDecoder,
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(uint)nowPos64, prevByte, m_OutWindow.GetByte(rep0));
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else
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b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, (uint)nowPos64, prevByte);
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m_OutWindow.PutByte(b);
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state.UpdateChar();
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nowPos64++;
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}
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else
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{
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uint len;
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if (m_IsRepDecoders[state.Index].Decode(m_RangeDecoder) == 1)
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{
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if (m_IsRepG0Decoders[state.Index].Decode(m_RangeDecoder) == 0)
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{
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if (m_IsRep0LongDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
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{
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state.UpdateShortRep();
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m_OutWindow.PutByte(m_OutWindow.GetByte(rep0));
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nowPos64++;
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continue;
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}
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}
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else
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{
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UInt32 distance;
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if (m_IsRepG1Decoders[state.Index].Decode(m_RangeDecoder) == 0)
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{
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distance = rep1;
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}
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else
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{
|
||||
if (m_IsRepG2Decoders[state.Index].Decode(m_RangeDecoder) == 0)
|
||||
distance = rep2;
|
||||
else
|
||||
{
|
||||
distance = rep3;
|
||||
rep3 = rep2;
|
||||
}
|
||||
rep2 = rep1;
|
||||
}
|
||||
rep1 = rep0;
|
||||
rep0 = distance;
|
||||
}
|
||||
len = m_RepLenDecoder.Decode(m_RangeDecoder, posState) + Base.kMatchMinLen;
|
||||
state.UpdateRep();
|
||||
}
|
||||
else
|
||||
{
|
||||
rep3 = rep2;
|
||||
rep2 = rep1;
|
||||
rep1 = rep0;
|
||||
len = Base.kMatchMinLen + m_LenDecoder.Decode(m_RangeDecoder, posState);
|
||||
state.UpdateMatch();
|
||||
uint posSlot = m_PosSlotDecoder[Base.GetLenToPosState(len)].Decode(m_RangeDecoder);
|
||||
if (posSlot >= Base.kStartPosModelIndex)
|
||||
{
|
||||
int numDirectBits = (int)((posSlot >> 1) - 1);
|
||||
rep0 = ((2 | (posSlot & 1)) << numDirectBits);
|
||||
if (posSlot < Base.kEndPosModelIndex)
|
||||
rep0 += BitTreeDecoder.ReverseDecode(m_PosDecoders,
|
||||
rep0 - posSlot - 1, m_RangeDecoder, numDirectBits);
|
||||
else
|
||||
{
|
||||
rep0 += (m_RangeDecoder.DecodeDirectBits(
|
||||
numDirectBits - Base.kNumAlignBits) << Base.kNumAlignBits);
|
||||
rep0 += m_PosAlignDecoder.ReverseDecode(m_RangeDecoder);
|
||||
}
|
||||
}
|
||||
else
|
||||
rep0 = posSlot;
|
||||
}
|
||||
if (rep0 >= m_OutWindow.TrainSize + nowPos64 || rep0 >= m_DictionarySizeCheck)
|
||||
{
|
||||
if (rep0 == 0xFFFFFFFF)
|
||||
break;
|
||||
throw new DataErrorException();
|
||||
}
|
||||
m_OutWindow.CopyBlock(rep0, len);
|
||||
nowPos64 += len;
|
||||
}
|
||||
}
|
||||
}
|
||||
m_OutWindow.Flush();
|
||||
m_OutWindow.ReleaseStream();
|
||||
m_RangeDecoder.ReleaseStream();
|
||||
}
|
||||
|
||||
public void SetDecoderProperties(byte[] properties)
|
||||
{
|
||||
if (properties.Length < 5)
|
||||
throw new InvalidParamException();
|
||||
int lc = properties[0] % 9;
|
||||
int remainder = properties[0] / 9;
|
||||
int lp = remainder % 5;
|
||||
int pb = remainder / 5;
|
||||
if (pb > Base.kNumPosStatesBitsMax)
|
||||
throw new InvalidParamException();
|
||||
UInt32 dictionarySize = 0;
|
||||
for (int i = 0; i < 4; i++)
|
||||
dictionarySize += ((UInt32)(properties[1 + i])) << (i * 8);
|
||||
SetDictionarySize(dictionarySize);
|
||||
SetLiteralProperties(lp, lc);
|
||||
SetPosBitsProperties(pb);
|
||||
}
|
||||
|
||||
public bool Train(System.IO.Stream stream)
|
||||
{
|
||||
_solid = true;
|
||||
return m_OutWindow.Train(stream);
|
||||
}
|
||||
|
||||
/*
|
||||
public override bool CanRead { get { return true; }}
|
||||
public override bool CanWrite { get { return true; }}
|
||||
public override bool CanSeek { get { return true; }}
|
||||
public override long Length { get { return 0; }}
|
||||
public override long Position
|
||||
{
|
||||
get { return 0; }
|
||||
set { }
|
||||
}
|
||||
public override void Flush() { }
|
||||
public override int Read(byte[] buffer, int offset, int count)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
public override void Write(byte[] buffer, int offset, int count)
|
||||
{
|
||||
}
|
||||
public override long Seek(long offset, System.IO.SeekOrigin origin)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
public override void SetLength(long value) {}
|
||||
*/
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,117 @@
|
|||
using System;
|
||||
|
||||
namespace SevenZip.Compression.RangeCoder
|
||||
{
|
||||
class Decoder
|
||||
{
|
||||
public const uint kTopValue = (1 << 24);
|
||||
public uint Range;
|
||||
public uint Code;
|
||||
// public Buffer.InBuffer Stream = new Buffer.InBuffer(1 << 16);
|
||||
public System.IO.Stream Stream;
|
||||
|
||||
public void Init(System.IO.Stream stream)
|
||||
{
|
||||
// Stream.Init(stream);
|
||||
Stream = stream;
|
||||
|
||||
Code = 0;
|
||||
Range = 0xFFFFFFFF;
|
||||
for (int i = 0; i < 5; i++)
|
||||
Code = (Code << 8) | (byte)Stream.ReadByte();
|
||||
}
|
||||
|
||||
public void ReleaseStream()
|
||||
{
|
||||
// Stream.ReleaseStream();
|
||||
Stream = null;
|
||||
}
|
||||
|
||||
public void CloseStream()
|
||||
{
|
||||
Stream.Close();
|
||||
}
|
||||
|
||||
public void Normalize()
|
||||
{
|
||||
while (Range < kTopValue)
|
||||
{
|
||||
Code = (Code << 8) | (byte)Stream.ReadByte();
|
||||
Range <<= 8;
|
||||
}
|
||||
}
|
||||
|
||||
public void Normalize2()
|
||||
{
|
||||
if (Range < kTopValue)
|
||||
{
|
||||
Code = (Code << 8) | (byte)Stream.ReadByte();
|
||||
Range <<= 8;
|
||||
}
|
||||
}
|
||||
|
||||
public uint GetThreshold(uint total)
|
||||
{
|
||||
return Code / (Range /= total);
|
||||
}
|
||||
|
||||
public void Decode(uint start, uint size, uint total)
|
||||
{
|
||||
Code -= start * Range;
|
||||
Range *= size;
|
||||
Normalize();
|
||||
}
|
||||
|
||||
public uint DecodeDirectBits(int numTotalBits)
|
||||
{
|
||||
uint range = Range;
|
||||
uint code = Code;
|
||||
uint result = 0;
|
||||
for (int i = numTotalBits; i > 0; i--)
|
||||
{
|
||||
range >>= 1;
|
||||
/*
|
||||
result <<= 1;
|
||||
if (code >= range)
|
||||
{
|
||||
code -= range;
|
||||
result |= 1;
|
||||
}
|
||||
*/
|
||||
uint t = (code - range) >> 31;
|
||||
code -= range & (t - 1);
|
||||
result = (result << 1) | (1 - t);
|
||||
|
||||
if (range < kTopValue)
|
||||
{
|
||||
code = (code << 8) | (byte)Stream.ReadByte();
|
||||
range <<= 8;
|
||||
}
|
||||
}
|
||||
Range = range;
|
||||
Code = code;
|
||||
return result;
|
||||
}
|
||||
|
||||
public uint DecodeBit(uint size0, int numTotalBits)
|
||||
{
|
||||
uint newBound = (Range >> numTotalBits) * size0;
|
||||
uint symbol;
|
||||
if (Code < newBound)
|
||||
{
|
||||
symbol = 0;
|
||||
Range = newBound;
|
||||
}
|
||||
else
|
||||
{
|
||||
symbol = 1;
|
||||
Code -= newBound;
|
||||
Range -= newBound;
|
||||
}
|
||||
Normalize();
|
||||
return symbol;
|
||||
}
|
||||
|
||||
// ulong GetProcessedSize() {return Stream.GetProcessedSize(); }
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
using System;
|
||||
|
||||
namespace SevenZip.Compression.RangeCoder
|
||||
{
|
||||
struct BitDecoder
|
||||
{
|
||||
public const int kNumBitModelTotalBits = 11;
|
||||
public const uint kBitModelTotal = (1 << kNumBitModelTotalBits);
|
||||
const int kNumMoveBits = 5;
|
||||
|
||||
uint Prob;
|
||||
|
||||
public void UpdateModel(int numMoveBits, uint symbol)
|
||||
{
|
||||
if (symbol == 0)
|
||||
Prob += (kBitModelTotal - Prob) >> numMoveBits;
|
||||
else
|
||||
Prob -= (Prob) >> numMoveBits;
|
||||
}
|
||||
|
||||
public void Init() { Prob = kBitModelTotal >> 1; }
|
||||
|
||||
public uint Decode(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint newBound = (uint)(rangeDecoder.Range >> kNumBitModelTotalBits) * (uint)Prob;
|
||||
if (rangeDecoder.Code < newBound)
|
||||
{
|
||||
rangeDecoder.Range = newBound;
|
||||
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
|
||||
if (rangeDecoder.Range < Decoder.kTopValue)
|
||||
{
|
||||
rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
|
||||
rangeDecoder.Range <<= 8;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
rangeDecoder.Range -= newBound;
|
||||
rangeDecoder.Code -= newBound;
|
||||
Prob -= (Prob) >> kNumMoveBits;
|
||||
if (rangeDecoder.Range < Decoder.kTopValue)
|
||||
{
|
||||
rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
|
||||
rangeDecoder.Range <<= 8;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,59 @@
|
|||
using System;
|
||||
|
||||
namespace SevenZip.Compression.RangeCoder
|
||||
{
|
||||
struct BitTreeDecoder
|
||||
{
|
||||
BitDecoder[] Models;
|
||||
int NumBitLevels;
|
||||
|
||||
public BitTreeDecoder(int numBitLevels)
|
||||
{
|
||||
NumBitLevels = numBitLevels;
|
||||
Models = new BitDecoder[1 << numBitLevels];
|
||||
}
|
||||
|
||||
public void Init()
|
||||
{
|
||||
for (uint i = 1; i < (1 << NumBitLevels); i++)
|
||||
Models[i].Init();
|
||||
}
|
||||
|
||||
public uint Decode(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint m = 1;
|
||||
for (int bitIndex = NumBitLevels; bitIndex > 0; bitIndex--)
|
||||
m = (m << 1) + Models[m].Decode(rangeDecoder);
|
||||
return m - ((uint)1 << NumBitLevels);
|
||||
}
|
||||
|
||||
public uint ReverseDecode(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint m = 1;
|
||||
uint symbol = 0;
|
||||
for (int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
|
||||
{
|
||||
uint bit = Models[m].Decode(rangeDecoder);
|
||||
m <<= 1;
|
||||
m += bit;
|
||||
symbol |= (bit << bitIndex);
|
||||
}
|
||||
return symbol;
|
||||
}
|
||||
|
||||
public static uint ReverseDecode(BitDecoder[] Models, UInt32 startIndex,
|
||||
RangeCoder.Decoder rangeDecoder, int NumBitLevels)
|
||||
{
|
||||
uint m = 1;
|
||||
uint symbol = 0;
|
||||
for (int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
|
||||
{
|
||||
uint bit = Models[startIndex + m].Decode(rangeDecoder);
|
||||
m <<= 1;
|
||||
m += bit;
|
||||
symbol |= (bit << bitIndex);
|
||||
}
|
||||
return symbol;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,68 @@
|
|||
// ICoder.h
|
||||
|
||||
using System;
|
||||
|
||||
namespace SevenZip
|
||||
{
|
||||
/// <summary>
|
||||
/// The exception that is thrown when an error in input stream occurs during decoding.
|
||||
/// </summary>
|
||||
class DataErrorException : ApplicationException
|
||||
{
|
||||
public DataErrorException(): base("Data Error") { }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// The exception that is thrown when the value of an argument is outside the allowable range.
|
||||
/// </summary>
|
||||
class InvalidParamException : ApplicationException
|
||||
{
|
||||
public InvalidParamException(): base("Invalid Parameter") { }
|
||||
}
|
||||
|
||||
public interface ICodeProgress
|
||||
{
|
||||
/// <summary>
|
||||
/// Callback progress.
|
||||
/// </summary>
|
||||
/// <param name="inSize">
|
||||
/// input size. -1 if unknown.
|
||||
/// </param>
|
||||
/// <param name="outSize">
|
||||
/// output size. -1 if unknown.
|
||||
/// </param>
|
||||
void SetProgress(Int64 inSize, Int64 outSize);
|
||||
};
|
||||
|
||||
public interface ICoder
|
||||
{
|
||||
/// <summary>
|
||||
/// Codes streams.
|
||||
/// </summary>
|
||||
/// <param name="inStream">
|
||||
/// input Stream.
|
||||
/// </param>
|
||||
/// <param name="outStream">
|
||||
/// output Stream.
|
||||
/// </param>
|
||||
/// <param name="inSize">
|
||||
/// input Size. -1 if unknown.
|
||||
/// </param>
|
||||
/// <param name="outSize">
|
||||
/// output Size. -1 if unknown.
|
||||
/// </param>
|
||||
/// <param name="progress">
|
||||
/// callback progress reference.
|
||||
/// </param>
|
||||
/// <exception cref="SevenZip.DataErrorException">
|
||||
/// if input stream is not valid
|
||||
/// </exception>
|
||||
void Code(System.IO.Stream inStream, System.IO.Stream outStream,
|
||||
Int64 inSize, Int64 outSize, ICodeProgress progress);
|
||||
};
|
||||
|
||||
public interface ISetDecoderProperties
|
||||
{
|
||||
void SetDecoderProperties(byte[] properties);
|
||||
}
|
||||
}
|
||||
|
|
@ -45,6 +45,13 @@
|
|||
<Reference Include="System.XML" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<Compile Include="7zip\Compress\LZMA\LzmaBase.cs" />
|
||||
<Compile Include="7zip\Compress\LZMA\LzmaDecoder.cs" />
|
||||
<Compile Include="7zip\Compress\LZ\LzOutWindow.cs" />
|
||||
<Compile Include="7zip\Compress\RangeCoder\RangeCoder.cs" />
|
||||
<Compile Include="7zip\Compress\RangeCoder\RangeCoderBit.cs" />
|
||||
<Compile Include="7zip\Compress\RangeCoder\RangeCoderBitTree.cs" />
|
||||
<Compile Include="7zip\ICoder.cs" />
|
||||
<Compile Include="AssemblyClient\AssemblyClient.cs" />
|
||||
<Compile Include="AssemblyClient\AssemblyClientFactory.cs" />
|
||||
<Compile Include="AssemblyClient\IAssemblyClient.cs" />
|
||||
|
|
|
|||
Loading…
Reference in New Issue