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Cosmos/Users/Orvid/Orvid.Compression/LZMA.cs

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using System;
using System.IO;
namespace Orvid.Compression
{
public static class LZMA
{
#region Properties
static int dictionary = 1 << 23;
static bool eos = false;
static CoderPropID[] propIDs = {
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker
};
static object[] properties = {
(Int32)(dictionary),
(Int32)(2),
(Int32)(3),
(Int32)(0),
(Int32)(2),
(Int32)(128),
"bt4",
eos
};
#endregion
public static byte[] Compress(byte[] inputBytes)
{
MemoryStream inStream = new MemoryStream(inputBytes);
MemoryStream outStream = new MemoryStream();
LZMAEncoder encoder = new LZMAEncoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
long fileSize = inStream.Length;
for (int i = 0; i < 8; i++)
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
encoder.Code(inStream, outStream, -1, -1, null);
return outStream.ToArray();
}
public static byte[] Decompress(byte[] inputBytes)
{
MemoryStream newInStream = new MemoryStream(inputBytes);
LZMADecoder decoder = new LZMADecoder();
newInStream.Seek(0, 0);
MemoryStream newOutStream = new MemoryStream();
byte[] properties2 = new byte[5];
if (newInStream.Read(properties2, 0, 5) != 5)
throw (new Exception("input .lzma is too short"));
long outSize = 0;
for (int i = 0; i < 8; i++)
{
int v = newInStream.ReadByte();
if (v < 0)
throw (new Exception("Can't Read 1"));
outSize |= ((long)(byte)v) << (8 * i);
}
decoder.SetDecoderProperties(properties2);
long compressedSize = newInStream.Length - newInStream.Position;
decoder.Code(newInStream, newOutStream, compressedSize, outSize, null);
byte[] b = newOutStream.ToArray();
return b;
}
#region LZMA
#region LZMABase
private abstract class LZMABase
{
public const uint kNumRepDistances = 4;
public const uint kNumStates = 12;
public struct State
{
public uint Index;
public void Init() { Index = 0; }
public void UpdateChar()
{
if (Index < 4) Index = 0;
else if (Index < 10) Index -= 3;
else Index -= 6;
}
public void UpdateMatch() { Index = (uint)(Index < 7 ? 7 : 10); }
public void UpdateRep() { Index = (uint)(Index < 7 ? 8 : 11); }
public void UpdateShortRep() { Index = (uint)(Index < 7 ? 9 : 11); }
public bool IsCharState() { return Index < 7; }
}
public const int kNumPosSlotBits = 6;
public const int kDicLogSizeMin = 0;
public const int kNumLenToPosStatesBits = 2;
public const uint kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
public const uint kMatchMinLen = 2;
public static uint GetLenToPosState(uint len)
{
len -= kMatchMinLen;
if (len < kNumLenToPosStates)
return len;
return (uint)(kNumLenToPosStates - 1);
}
public const int kNumAlignBits = 4;
public const uint kAlignTableSize = 1 << kNumAlignBits;
public const uint kAlignMask = (kAlignTableSize - 1);
public const uint kStartPosModelIndex = 4;
public const uint kEndPosModelIndex = 14;
public const uint kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
public const uint kNumFullDistances = 1 << ((int)kEndPosModelIndex / 2);
public const uint kNumLitPosStatesBitsEncodingMax = 4;
public const uint kNumLitContextBitsMax = 8;
public const int kNumPosStatesBitsMax = 4;
public const uint kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
public const int kNumPosStatesBitsEncodingMax = 4;
public const uint kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
public const int kNumLowLenBits = 3;
public const int kNumMidLenBits = 3;
public const int kNumHighLenBits = 8;
public const uint kNumLowLenSymbols = 1 << kNumLowLenBits;
public const uint kNumMidLenSymbols = 1 << kNumMidLenBits;
public const uint kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols + (1 << kNumHighLenBits);
public const uint kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
}
#endregion
#region LZMADecoder
private class LZMADecoder : ICoder
{
class LenDecoder
{
LZMARangeBitDecoder m_Choice = new LZMARangeBitDecoder();
LZMARangeBitDecoder m_Choice2 = new LZMARangeBitDecoder();
LZMARangeBitTreeDecoder[] m_LowCoder = new LZMARangeBitTreeDecoder[LZMABase.kNumPosStatesMax];
LZMARangeBitTreeDecoder[] m_MidCoder = new LZMARangeBitTreeDecoder[LZMABase.kNumPosStatesMax];
LZMARangeBitTreeDecoder m_HighCoder = new LZMARangeBitTreeDecoder(LZMABase.kNumHighLenBits);
uint m_NumPosStates = 0;
public void Create(uint numPosStates)
{
for (uint posState = m_NumPosStates; posState < numPosStates; posState++)
{
m_LowCoder[posState] = new LZMARangeBitTreeDecoder(LZMABase.kNumLowLenBits);
m_MidCoder[posState] = new LZMARangeBitTreeDecoder(LZMABase.kNumMidLenBits);
}
m_NumPosStates = numPosStates;
}
public void Init()
{
m_Choice.Init();
for (uint posState = 0; posState < m_NumPosStates; posState++)
{
m_LowCoder[posState].Init();
m_MidCoder[posState].Init();
}
m_Choice2.Init();
m_HighCoder.Init();
}
public uint Decode(LZMARangeDecoder rangeDecoder, uint posState)
{
if (m_Choice.Decode(rangeDecoder) == 0)
return m_LowCoder[posState].Decode(rangeDecoder);
else
{
uint symbol = LZMABase.kNumLowLenSymbols;
if (m_Choice2.Decode(rangeDecoder) == 0)
symbol += m_MidCoder[posState].Decode(rangeDecoder);
else
{
symbol += LZMABase.kNumMidLenSymbols;
symbol += m_HighCoder.Decode(rangeDecoder);
}
return symbol;
}
}
}
class LiteralDecoder
{
struct Decoder2
{
LZMARangeBitDecoder[] m_Decoders;
public void Create() { m_Decoders = new LZMARangeBitDecoder[0x300]; }
public void Init() { for (int i = 0; i < 0x300; i++) m_Decoders[i].Init(); }
public byte DecodeNormal(LZMARangeDecoder rangeDecoder)
{
uint symbol = 1;
do
symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
while (symbol < 0x100);
return (byte)symbol;
}
public byte DecodeWithMatchByte(LZMARangeDecoder rangeDecoder, byte matchByte)
{
uint symbol = 1;
do
{
uint matchBit = (uint)(matchByte >> 7) & 1;
matchByte <<= 1;
uint bit = m_Decoders[((1 + matchBit) << 8) + symbol].Decode(rangeDecoder);
symbol = (symbol << 1) | bit;
if (matchBit != bit)
{
while (symbol < 0x100)
symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
break;
}
}
while (symbol < 0x100);
return (byte)symbol;
}
}
Decoder2[] m_Coders;
int m_NumPrevBits;
int m_NumPosBits;
uint m_PosMask;
public void Create(int numPosBits, int numPrevBits)
{
if (m_Coders != null && m_NumPrevBits == numPrevBits &&
m_NumPosBits == numPosBits)
return;
m_NumPosBits = numPosBits;
m_PosMask = ((uint)1 << numPosBits) - 1;
m_NumPrevBits = numPrevBits;
uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
m_Coders = new Decoder2[numStates];
for (uint i = 0; i < numStates; i++)
m_Coders[i].Create();
}
public void Init()
{
uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
for (uint i = 0; i < numStates; i++)
{
m_Coders[i].Init();
}
}
uint GetState(uint pos, byte prevByte)
{ return ((pos & m_PosMask) << m_NumPrevBits) + (uint)(prevByte >> (8 - m_NumPrevBits)); }
public byte DecodeNormal(LZMARangeDecoder rangeDecoder, uint pos, byte prevByte)
{ return m_Coders[GetState(pos, prevByte)].DecodeNormal(rangeDecoder); }
public byte DecodeWithMatchByte(LZMARangeDecoder rangeDecoder, uint pos, byte prevByte, byte matchByte)
{ return m_Coders[GetState(pos, prevByte)].DecodeWithMatchByte(rangeDecoder, matchByte); }
};
LZOutWindow m_OutWindow = new LZOutWindow();
LZMARangeDecoder m_RangeDecoder = new LZMARangeDecoder();
LZMARangeBitDecoder[] m_IsMatchDecoders = new LZMARangeBitDecoder[LZMABase.kNumStates << LZMABase.kNumPosStatesBitsMax];
LZMARangeBitDecoder[] m_IsRepDecoders = new LZMARangeBitDecoder[LZMABase.kNumStates];
LZMARangeBitDecoder[] m_IsRepG0Decoders = new LZMARangeBitDecoder[LZMABase.kNumStates];
LZMARangeBitDecoder[] m_IsRepG1Decoders = new LZMARangeBitDecoder[LZMABase.kNumStates];
LZMARangeBitDecoder[] m_IsRepG2Decoders = new LZMARangeBitDecoder[LZMABase.kNumStates];
LZMARangeBitDecoder[] m_IsRep0LongDecoders = new LZMARangeBitDecoder[LZMABase.kNumStates << LZMABase.kNumPosStatesBitsMax];
LZMARangeBitTreeDecoder[] m_PosSlotDecoder = new LZMARangeBitTreeDecoder[LZMABase.kNumLenToPosStates];
LZMARangeBitDecoder[] m_PosDecoders = new LZMARangeBitDecoder[LZMABase.kNumFullDistances - LZMABase.kEndPosModelIndex];
LZMARangeBitTreeDecoder m_PosAlignDecoder = new LZMARangeBitTreeDecoder(LZMABase.kNumAlignBits);
LenDecoder m_LenDecoder = new LenDecoder();
LenDecoder m_RepLenDecoder = new LenDecoder();
LiteralDecoder m_LiteralDecoder = new LiteralDecoder();
uint m_DictionarySize;
uint m_DictionarySizeCheck;
uint m_PosStateMask;
public LZMADecoder()
{
m_DictionarySize = 0xFFFFFFFF;
for (int i = 0; i < LZMABase.kNumLenToPosStates; i++)
m_PosSlotDecoder[i] = new LZMARangeBitTreeDecoder(LZMABase.kNumPosSlotBits);
}
void SetDictionarySize(uint dictionarySize)
{
if (m_DictionarySize != dictionarySize)
{
m_DictionarySize = dictionarySize;
m_DictionarySizeCheck = Math.Max(m_DictionarySize, 1);
uint blockSize = Math.Max(m_DictionarySizeCheck, (1 << 12));
m_OutWindow.Create(blockSize);
}
}
void SetLiteralProperties(int lp, int lc)
{
if (lp > 8)
throw new Exception();
if (lc > 8)
throw new Exception();
m_LiteralDecoder.Create(lp, lc);
}
void SetPosBitsProperties(int pb)
{
if (pb > LZMABase.kNumPosStatesBitsMax)
throw new Exception();
uint numPosStates = (uint)1 << pb;
m_LenDecoder.Create(numPosStates);
m_RepLenDecoder.Create(numPosStates);
m_PosStateMask = numPosStates - 1;
}
void Init(System.IO.Stream inStream, System.IO.Stream outStream)
{
m_RangeDecoder.Init(inStream);
m_OutWindow.Init(outStream);
uint i;
for (i = 0; i < LZMABase.kNumStates; i++)
{
for (uint j = 0; j <= m_PosStateMask; j++)
{
uint index = (i << LZMABase.kNumPosStatesBitsMax) + j;
m_IsMatchDecoders[index].Init();
m_IsRep0LongDecoders[index].Init();
}
m_IsRepDecoders[i].Init();
m_IsRepG0Decoders[i].Init();
m_IsRepG1Decoders[i].Init();
m_IsRepG2Decoders[i].Init();
}
m_LiteralDecoder.Init();
for (i = 0; i < LZMABase.kNumLenToPosStates; i++)
m_PosSlotDecoder[i].Init();
// m_PosSpecDecoder.Init();
for (i = 0; i < LZMABase.kNumFullDistances - LZMABase.kEndPosModelIndex; i++)
m_PosDecoders[i].Init();
m_LenDecoder.Init();
m_RepLenDecoder.Init();
m_PosAlignDecoder.Init();
}
public override void Code(System.IO.Stream inStream, System.IO.Stream outStream, Int64 inSize, Int64 outSize, ICodeProgress progress)
{
Init(inStream, outStream);
LZMABase.State state = new LZMABase.State();
state.Init();
uint rep0 = 0, rep1 = 0, rep2 = 0, rep3 = 0;
UInt64 nowPos64 = 0;
UInt64 outSize64 = (UInt64)outSize;
if (nowPos64 < outSize64)
{
if (m_IsMatchDecoders[state.Index << LZMABase.kNumPosStatesBitsMax].Decode(m_RangeDecoder) != 0)
throw new Exception();
state.UpdateChar();
byte b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, 0, 0);
m_OutWindow.PutByte(b);
nowPos64++;
}
while (nowPos64 < outSize64)
{
// UInt64 next = Math.Min(nowPos64 + (1 << 18), outSize64);
// while(nowPos64 < next)
{
uint posState = (uint)nowPos64 & m_PosStateMask;
if (m_IsMatchDecoders[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
{
byte b;
byte prevByte = m_OutWindow.GetByte(0);
if (!state.IsCharState())
b = m_LiteralDecoder.DecodeWithMatchByte(m_RangeDecoder,
(uint)nowPos64, prevByte, m_OutWindow.GetByte(rep0));
else
b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, (uint)nowPos64, prevByte);
m_OutWindow.PutByte(b);
state.UpdateChar();
nowPos64++;
}
else
{
uint len;
if (m_IsRepDecoders[state.Index].Decode(m_RangeDecoder) == 1)
{
if (m_IsRepG0Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
if (m_IsRep0LongDecoders[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
{
state.UpdateShortRep();
m_OutWindow.PutByte(m_OutWindow.GetByte(rep0));
nowPos64++;
continue;
}
}
else
{
UInt32 distance;
if (m_IsRepG1Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
distance = rep1;
}
else
{
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) + LZMABase.kMatchMinLen;
state.UpdateRep();
}
else
{
rep3 = rep2;
rep2 = rep1;
rep1 = rep0;
len = LZMABase.kMatchMinLen + m_LenDecoder.Decode(m_RangeDecoder, posState);
state.UpdateMatch();
uint posSlot = m_PosSlotDecoder[LZMABase.GetLenToPosState(len)].Decode(m_RangeDecoder);
if (posSlot >= LZMABase.kStartPosModelIndex)
{
int numDirectBits = (int)((posSlot >> 1) - 1);
rep0 = ((2 | (posSlot & 1)) << numDirectBits);
if (posSlot < LZMABase.kEndPosModelIndex)
rep0 += LZMARangeBitTreeDecoder.ReverseDecode(m_PosDecoders,
rep0 - posSlot - 1, m_RangeDecoder, numDirectBits);
else
{
rep0 += (m_RangeDecoder.DecodeDirectBits(
numDirectBits - LZMABase.kNumAlignBits) << LZMABase.kNumAlignBits);
rep0 += m_PosAlignDecoder.ReverseDecode(m_RangeDecoder);
}
}
else
rep0 = posSlot;
}
if (rep0 >= nowPos64 || rep0 >= m_DictionarySizeCheck)
{
if (rep0 == 0xFFFFFFFF)
break;
throw new Exception();
}
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 Exception();
int lc = properties[0] % 9;
int remainder = properties[0] / 9;
int lp = remainder % 5;
int pb = remainder / 5;
if (pb > LZMABase.kNumPosStatesBitsMax)
throw new Exception();
UInt32 dictionarySize = 0;
for (int i = 0; i < 4; i++)
dictionarySize += ((UInt32)(properties[1 + i])) << (i * 8);
SetDictionarySize(dictionarySize);
SetLiteralProperties(lp, lc);
SetPosBitsProperties(pb);
}
}
#endregion
#region LZMAEncoder
private class LZMAEncoder : ICoder
{
enum EMatchFinderType
{
BT2,
BT4,
};
const UInt32 kIfinityPrice = 0xFFFFFFF;
static Byte[] g_FastPos = new Byte[1 << 11];
static LZMAEncoder()
{
const Byte kFastSlots = 22;
int c = 2;
g_FastPos[0] = 0;
g_FastPos[1] = 1;
for (Byte slotFast = 2; slotFast < kFastSlots; slotFast++)
{
UInt32 k = ((UInt32)1 << ((slotFast >> 1) - 1));
for (UInt32 j = 0; j < k; j++, c++)
g_FastPos[c] = slotFast;
}
}
static UInt32 GetPosSlot(UInt32 pos)
{
if (pos < (1 << 11))
return g_FastPos[pos];
if (pos < (1 << 21))
return (UInt32)(g_FastPos[pos >> 10] + 20);
return (UInt32)(g_FastPos[pos >> 20] + 40);
}
static UInt32 GetPosSlot2(UInt32 pos)
{
if (pos < (1 << 17))
return (UInt32)(g_FastPos[pos >> 6] + 12);
if (pos < (1 << 27))
return (UInt32)(g_FastPos[pos >> 16] + 32);
return (UInt32)(g_FastPos[pos >> 26] + 52);
}
LZMABase.State _state = new LZMABase.State();
Byte _previousByte;
UInt32[] _repDistances = new UInt32[LZMABase.kNumRepDistances];
void BaseInit()
{
_state.Init();
_previousByte = 0;
for (UInt32 i = 0; i < LZMABase.kNumRepDistances; i++)
_repDistances[i] = 0;
}
const int kDefaultDictionaryLogSize = 22;
const UInt32 kNumFastBytesDefault = 0x20;
class LiteralEncoder
{
public struct Encoder2
{
LZMARangeBitEncoder[] m_Encoders;
public void Create() { m_Encoders = new LZMARangeBitEncoder[0x300]; }
public void Init() { for (int i = 0; i < 0x300; i++) m_Encoders[i].Init(); }
public void Encode(LZMARangeEncoder rangeEncoder, byte symbol)
{
uint context = 1;
for (int i = 7; i >= 0; i--)
{
uint bit = (uint)((symbol >> i) & 1);
m_Encoders[context].Encode(rangeEncoder, bit);
context = (context << 1) | bit;
}
}
public void EncodeMatched(LZMARangeEncoder rangeEncoder, byte matchByte, byte symbol)
{
uint context = 1;
bool same = true;
for (int i = 7; i >= 0; i--)
{
uint bit = (uint)((symbol >> i) & 1);
uint state = context;
if (same)
{
uint matchBit = (uint)((matchByte >> i) & 1);
state += ((1 + matchBit) << 8);
same = (matchBit == bit);
}
m_Encoders[state].Encode(rangeEncoder, bit);
context = (context << 1) | bit;
}
}
public uint GetPrice(bool matchMode, byte matchByte, byte symbol)
{
uint price = 0;
uint context = 1;
int i = 7;
if (matchMode)
{
for (; i >= 0; i--)
{
uint matchBit = (uint)(matchByte >> i) & 1;
uint bit = (uint)(symbol >> i) & 1;
price += m_Encoders[((1 + matchBit) << 8) + context].GetPrice(bit);
context = (context << 1) | bit;
if (matchBit != bit)
{
i--;
break;
}
}
}
for (; i >= 0; i--)
{
uint bit = (uint)(symbol >> i) & 1;
price += m_Encoders[context].GetPrice(bit);
context = (context << 1) | bit;
}
return price;
}
}
Encoder2[] m_Coders;
int m_NumPrevBits;
int m_NumPosBits;
uint m_PosMask;
public void Create(int numPosBits, int numPrevBits)
{
if (m_Coders != null && m_NumPrevBits == numPrevBits && m_NumPosBits == numPosBits)
return;
m_NumPosBits = numPosBits;
m_PosMask = ((uint)1 << numPosBits) - 1;
m_NumPrevBits = numPrevBits;
uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
m_Coders = new Encoder2[numStates];
for (uint i = 0; i < numStates; i++)
m_Coders[i].Create();
}
public void Init()
{
uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
for (uint i = 0; i < numStates; i++)
m_Coders[i].Init();
}
public Encoder2 GetSubCoder(UInt32 pos, Byte prevByte)
{ return m_Coders[((pos & m_PosMask) << m_NumPrevBits) + (uint)(prevByte >> (8 - m_NumPrevBits))]; }
}
class LenEncoder
{
LZMARangeBitEncoder _choice = new LZMARangeBitEncoder();
LZMARangeBitEncoder _choice2 = new LZMARangeBitEncoder();
LZMARangeBitTreeEncoder[] _lowCoder = new LZMARangeBitTreeEncoder[LZMABase.kNumPosStatesEncodingMax];
LZMARangeBitTreeEncoder[] _midCoder = new LZMARangeBitTreeEncoder[LZMABase.kNumPosStatesEncodingMax];
LZMARangeBitTreeEncoder _highCoder = new LZMARangeBitTreeEncoder(LZMABase.kNumHighLenBits);
public LenEncoder()
{
for (UInt32 posState = 0; posState < LZMABase.kNumPosStatesEncodingMax; posState++)
{
_lowCoder[posState] = new LZMARangeBitTreeEncoder(LZMABase.kNumLowLenBits);
_midCoder[posState] = new LZMARangeBitTreeEncoder(LZMABase.kNumMidLenBits);
}
}
public void Init(UInt32 numPosStates)
{
_choice.Init();
_choice2.Init();
for (UInt32 posState = 0; posState < numPosStates; posState++)
{
_lowCoder[posState].Init();
_midCoder[posState].Init();
}
_highCoder.Init();
}
public void Encode(LZMARangeEncoder rangeEncoder, UInt32 symbol, UInt32 posState)
{
if (symbol < LZMABase.kNumLowLenSymbols)
{
_choice.Encode(rangeEncoder, 0);
_lowCoder[posState].Encode(rangeEncoder, symbol);
}
else
{
symbol -= LZMABase.kNumLowLenSymbols;
_choice.Encode(rangeEncoder, 1);
if (symbol < LZMABase.kNumMidLenSymbols)
{
_choice2.Encode(rangeEncoder, 0);
_midCoder[posState].Encode(rangeEncoder, symbol);
}
else
{
_choice2.Encode(rangeEncoder, 1);
_highCoder.Encode(rangeEncoder, symbol - LZMABase.kNumMidLenSymbols);
}
}
}
public void SetPrices(UInt32 posState, UInt32 numSymbols, UInt32[] prices, UInt32 st)
{
UInt32 a0 = _choice.GetPrice0();
UInt32 a1 = _choice.GetPrice1();
UInt32 b0 = a1 + _choice2.GetPrice0();
UInt32 b1 = a1 + _choice2.GetPrice1();
UInt32 i = 0;
for (i = 0; i < LZMABase.kNumLowLenSymbols; i++)
{
if (i >= numSymbols)
return;
prices[st + i] = a0 + _lowCoder[posState].GetPrice(i);
}
for (; i < LZMABase.kNumLowLenSymbols + LZMABase.kNumMidLenSymbols; i++)
{
if (i >= numSymbols)
return;
prices[st + i] = b0 + _midCoder[posState].GetPrice(i - LZMABase.kNumLowLenSymbols);
}
for (; i < numSymbols; i++)
prices[st + i] = b1 + _highCoder.GetPrice(i - LZMABase.kNumLowLenSymbols - LZMABase.kNumMidLenSymbols);
}
};
const UInt32 kNumLenSpecSymbols = LZMABase.kNumLowLenSymbols + LZMABase.kNumMidLenSymbols;
class LenPriceTableEncoder : LenEncoder
{
UInt32[] _prices = new UInt32[LZMABase.kNumLenSymbols << LZMABase.kNumPosStatesBitsEncodingMax];
UInt32 _tableSize;
UInt32[] _counters = new UInt32[LZMABase.kNumPosStatesEncodingMax];
public void SetTableSize(UInt32 tableSize) { _tableSize = tableSize; }
public UInt32 GetPrice(UInt32 symbol, UInt32 posState)
{
return _prices[posState * LZMABase.kNumLenSymbols + symbol];
}
void UpdateTable(UInt32 posState)
{
SetPrices(posState, _tableSize, _prices, posState * LZMABase.kNumLenSymbols);
_counters[posState] = _tableSize;
}
public void UpdateTables(UInt32 numPosStates)
{
for (UInt32 posState = 0; posState < numPosStates; posState++)
UpdateTable(posState);
}
public new void Encode(LZMARangeEncoder rangeEncoder, UInt32 symbol, UInt32 posState)
{
base.Encode(rangeEncoder, symbol, posState);
if (--_counters[posState] == 0)
UpdateTable(posState);
}
}
const UInt32 kNumOpts = 1 << 12;
class Optimal
{
public LZMABase.State State;
public bool Prev1IsChar;
public bool Prev2;
public UInt32 PosPrev2;
public UInt32 BackPrev2;
public UInt32 Price;
public UInt32 PosPrev;
public UInt32 BackPrev;
public UInt32 Backs0;
public UInt32 Backs1;
public UInt32 Backs2;
public UInt32 Backs3;
public void MakeAsChar() { BackPrev = 0xFFFFFFFF; Prev1IsChar = false; }
public void MakeAsShortRep() { BackPrev = 0; ; Prev1IsChar = false; }
public bool IsShortRep() { return (BackPrev == 0); }
};
Optimal[] _optimum = new Optimal[kNumOpts];
LZBinTree _matchFinder = null;
LZMARangeEncoder _rangeEncoder = new LZMARangeEncoder();
LZMARangeBitEncoder[] _isMatch = new LZMARangeBitEncoder[LZMABase.kNumStates << LZMABase.kNumPosStatesBitsMax];
LZMARangeBitEncoder[] _isRep = new LZMARangeBitEncoder[LZMABase.kNumStates];
LZMARangeBitEncoder[] _isRepG0 = new LZMARangeBitEncoder[LZMABase.kNumStates];
LZMARangeBitEncoder[] _isRepG1 = new LZMARangeBitEncoder[LZMABase.kNumStates];
LZMARangeBitEncoder[] _isRepG2 = new LZMARangeBitEncoder[LZMABase.kNumStates];
LZMARangeBitEncoder[] _isRep0Long = new LZMARangeBitEncoder[LZMABase.kNumStates << LZMABase.kNumPosStatesBitsMax];
LZMARangeBitTreeEncoder[] _posSlotEncoder = new LZMARangeBitTreeEncoder[LZMABase.kNumLenToPosStates];
LZMARangeBitEncoder[] _posEncoders = new LZMARangeBitEncoder[LZMABase.kNumFullDistances - LZMABase.kEndPosModelIndex];
LZMARangeBitTreeEncoder _posAlignEncoder = new LZMARangeBitTreeEncoder(LZMABase.kNumAlignBits);
LenPriceTableEncoder _lenEncoder = new LenPriceTableEncoder();
LenPriceTableEncoder _repMatchLenEncoder = new LenPriceTableEncoder();
LiteralEncoder _literalEncoder = new LiteralEncoder();
UInt32[] _matchDistances = new UInt32[LZMABase.kMatchMaxLen * 2 + 2];
UInt32 _numFastBytes = kNumFastBytesDefault;
UInt32 _longestMatchLength;
UInt32 _numDistancePairs;
UInt32 _additionalOffset;
UInt32 _optimumEndIndex;
UInt32 _optimumCurrentIndex;
bool _longestMatchWasFound;
UInt32[] _posSlotPrices = new UInt32[1 << (LZMABase.kNumPosSlotBits + LZMABase.kNumLenToPosStatesBits)];
UInt32[] _distancesPrices = new UInt32[LZMABase.kNumFullDistances << LZMABase.kNumLenToPosStatesBits];
UInt32[] _alignPrices = new UInt32[LZMABase.kAlignTableSize];
UInt32 _alignPriceCount;
UInt32 _distTableSize = (kDefaultDictionaryLogSize * 2);
int _posStateBits = 2;
UInt32 _posStateMask = (4 - 1);
int _numLiteralPosStateBits = 0;
int _numLiteralContextBits = 3;
UInt32 _dictionarySize = (1 << kDefaultDictionaryLogSize);
UInt32 _dictionarySizePrev = 0xFFFFFFFF;
UInt32 _numFastBytesPrev = 0xFFFFFFFF;
Int64 nowPos64;
bool _finished;
System.IO.Stream _inStream;
EMatchFinderType _matchFinderType = EMatchFinderType.BT4;
bool _writeEndMark = false;
bool _needReleaseMFStream;
void Create()
{
if (_matchFinder == null)
{
LZBinTree bt = new LZBinTree();
int numHashBytes = 4;
if (_matchFinderType == EMatchFinderType.BT2)
numHashBytes = 2;
bt.SetType(numHashBytes);
_matchFinder = bt;
}
_literalEncoder.Create(_numLiteralPosStateBits, _numLiteralContextBits);
if (_dictionarySize == _dictionarySizePrev && _numFastBytesPrev == _numFastBytes)
return;
_matchFinder.Create(_dictionarySize, kNumOpts, _numFastBytes, LZMABase.kMatchMaxLen + 1);
_dictionarySizePrev = _dictionarySize;
_numFastBytesPrev = _numFastBytes;
}
public LZMAEncoder()
{
for (int i = 0; i < kNumOpts; i++)
_optimum[i] = new Optimal();
for (int i = 0; i < LZMABase.kNumLenToPosStates; i++)
_posSlotEncoder[i] = new LZMARangeBitTreeEncoder(LZMABase.kNumPosSlotBits);
}
void SetWriteEndMarkerMode(bool writeEndMarker)
{
_writeEndMark = writeEndMarker;
}
void Init()
{
BaseInit();
_rangeEncoder.Init();
uint i;
for (i = 0; i < LZMABase.kNumStates; i++)
{
for (uint j = 0; j <= _posStateMask; j++)
{
uint complexState = (i << LZMABase.kNumPosStatesBitsMax) + j;
_isMatch[complexState].Init();
_isRep0Long[complexState].Init();
}
_isRep[i].Init();
_isRepG0[i].Init();
_isRepG1[i].Init();
_isRepG2[i].Init();
}
_literalEncoder.Init();
for (i = 0; i < LZMABase.kNumLenToPosStates; i++)
_posSlotEncoder[i].Init();
for (i = 0; i < LZMABase.kNumFullDistances - LZMABase.kEndPosModelIndex; i++)
_posEncoders[i].Init();
_lenEncoder.Init((UInt32)1 << _posStateBits);
_repMatchLenEncoder.Init((UInt32)1 << _posStateBits);
_posAlignEncoder.Init();
_longestMatchWasFound = false;
_optimumEndIndex = 0;
_optimumCurrentIndex = 0;
_additionalOffset = 0;
}
void ReadMatchDistances(out UInt32 lenRes, out UInt32 numDistancePairs)
{
lenRes = 0;
numDistancePairs = _matchFinder.GetMatches(_matchDistances);
if (numDistancePairs > 0)
{
lenRes = _matchDistances[numDistancePairs - 2];
if (lenRes == _numFastBytes)
lenRes += _matchFinder.GetMatchLen((int)lenRes - 1, _matchDistances[numDistancePairs - 1],
LZMABase.kMatchMaxLen - lenRes);
}
_additionalOffset++;
}
void MovePos(UInt32 num)
{
if (num > 0)
{
_matchFinder.Skip(num);
_additionalOffset += num;
}
}
UInt32 GetRepLen1Price(LZMABase.State state, UInt32 posState)
{
return _isRepG0[state.Index].GetPrice0() +
_isRep0Long[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice0();
}
UInt32 GetPureRepPrice(UInt32 repIndex, LZMABase.State state, UInt32 posState)
{
UInt32 price;
if (repIndex == 0)
{
price = _isRepG0[state.Index].GetPrice0();
price += _isRep0Long[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice1();
}
else
{
price = _isRepG0[state.Index].GetPrice1();
if (repIndex == 1)
price += _isRepG1[state.Index].GetPrice0();
else
{
price += _isRepG1[state.Index].GetPrice1();
price += _isRepG2[state.Index].GetPrice(repIndex - 2);
}
}
return price;
}
UInt32 GetRepPrice(UInt32 repIndex, UInt32 len, LZMABase.State state, UInt32 posState)
{
UInt32 price = _repMatchLenEncoder.GetPrice(len - LZMABase.kMatchMinLen, posState);
return price + GetPureRepPrice(repIndex, state, posState);
}
UInt32 GetPosLenPrice(UInt32 pos, UInt32 len, UInt32 posState)
{
UInt32 price;
UInt32 lenToPosState = LZMABase.GetLenToPosState(len);
if (pos < LZMABase.kNumFullDistances)
price = _distancesPrices[(lenToPosState * LZMABase.kNumFullDistances) + pos];
else
price = _posSlotPrices[(lenToPosState << LZMABase.kNumPosSlotBits) + GetPosSlot2(pos)] +
_alignPrices[pos & LZMABase.kAlignMask];
return price + _lenEncoder.GetPrice(len - LZMABase.kMatchMinLen, posState);
}
UInt32 Backward(out UInt32 backRes, UInt32 cur)
{
_optimumEndIndex = cur;
UInt32 posMem = _optimum[cur].PosPrev;
UInt32 backMem = _optimum[cur].BackPrev;
do
{
if (_optimum[cur].Prev1IsChar)
{
_optimum[posMem].MakeAsChar();
_optimum[posMem].PosPrev = posMem - 1;
if (_optimum[cur].Prev2)
{
_optimum[posMem - 1].Prev1IsChar = false;
_optimum[posMem - 1].PosPrev = _optimum[cur].PosPrev2;
_optimum[posMem - 1].BackPrev = _optimum[cur].BackPrev2;
}
}
UInt32 posPrev = posMem;
UInt32 backCur = backMem;
backMem = _optimum[posPrev].BackPrev;
posMem = _optimum[posPrev].PosPrev;
_optimum[posPrev].BackPrev = backCur;
_optimum[posPrev].PosPrev = cur;
cur = posPrev;
}
while (cur > 0);
backRes = _optimum[0].BackPrev;
_optimumCurrentIndex = _optimum[0].PosPrev;
return _optimumCurrentIndex;
}
UInt32[] reps = new UInt32[LZMABase.kNumRepDistances];
UInt32[] repLens = new UInt32[LZMABase.kNumRepDistances];
UInt32 GetOptimum(UInt32 position, out UInt32 backRes)
{
if (_optimumEndIndex != _optimumCurrentIndex)
{
UInt32 lenRes = _optimum[_optimumCurrentIndex].PosPrev - _optimumCurrentIndex;
backRes = _optimum[_optimumCurrentIndex].BackPrev;
_optimumCurrentIndex = _optimum[_optimumCurrentIndex].PosPrev;
return lenRes;
}
_optimumCurrentIndex = _optimumEndIndex = 0;
UInt32 lenMain, numDistancePairs;
if (!_longestMatchWasFound)
{
ReadMatchDistances(out lenMain, out numDistancePairs);
}
else
{
lenMain = _longestMatchLength;
numDistancePairs = _numDistancePairs;
_longestMatchWasFound = false;
}
UInt32 numAvailableBytes = _matchFinder.GetNumAvailableBytes() + 1;
if (numAvailableBytes < 2)
{
backRes = 0xFFFFFFFF;
return 1;
}
if (numAvailableBytes > LZMABase.kMatchMaxLen)
numAvailableBytes = LZMABase.kMatchMaxLen;
UInt32 repMaxIndex = 0;
UInt32 i;
for (i = 0; i < LZMABase.kNumRepDistances; i++)
{
reps[i] = _repDistances[i];
repLens[i] = _matchFinder.GetMatchLen(0 - 1, reps[i], LZMABase.kMatchMaxLen);
if (repLens[i] > repLens[repMaxIndex])
repMaxIndex = i;
}
if (repLens[repMaxIndex] >= _numFastBytes)
{
backRes = repMaxIndex;
UInt32 lenRes = repLens[repMaxIndex];
MovePos(lenRes - 1);
return lenRes;
}
if (lenMain >= _numFastBytes)
{
backRes = _matchDistances[numDistancePairs - 1] + LZMABase.kNumRepDistances;
MovePos(lenMain - 1);
return lenMain;
}
Byte currentByte = _matchFinder.GetIndexByte(0 - 1);
Byte matchByte = _matchFinder.GetIndexByte((Int32)(0 - _repDistances[0] - 1 - 1));
if (lenMain < 2 && currentByte != matchByte && repLens[repMaxIndex] < 2)
{
backRes = (UInt32)0xFFFFFFFF;
return 1;
}
_optimum[0].State = _state;
UInt32 posState = (position & _posStateMask);
_optimum[1].Price = _isMatch[(_state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice0() +
_literalEncoder.GetSubCoder(position, _previousByte).GetPrice(!_state.IsCharState(), matchByte, currentByte);
_optimum[1].MakeAsChar();
UInt32 matchPrice = _isMatch[(_state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice1();
UInt32 repMatchPrice = matchPrice + _isRep[_state.Index].GetPrice1();
if (matchByte == currentByte)
{
UInt32 shortRepPrice = repMatchPrice + GetRepLen1Price(_state, posState);
if (shortRepPrice < _optimum[1].Price)
{
_optimum[1].Price = shortRepPrice;
_optimum[1].MakeAsShortRep();
}
}
UInt32 lenEnd = ((lenMain >= repLens[repMaxIndex]) ? lenMain : repLens[repMaxIndex]);
if (lenEnd < 2)
{
backRes = _optimum[1].BackPrev;
return 1;
}
_optimum[1].PosPrev = 0;
_optimum[0].Backs0 = reps[0];
_optimum[0].Backs1 = reps[1];
_optimum[0].Backs2 = reps[2];
_optimum[0].Backs3 = reps[3];
UInt32 len = lenEnd;
do
_optimum[len--].Price = kIfinityPrice;
while (len >= 2);
for (i = 0; i < LZMABase.kNumRepDistances; i++)
{
UInt32 repLen = repLens[i];
if (repLen < 2)
continue;
UInt32 price = repMatchPrice + GetPureRepPrice(i, _state, posState);
do
{
UInt32 curAndLenPrice = price + _repMatchLenEncoder.GetPrice(repLen - 2, posState);
Optimal optimum = _optimum[repLen];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = 0;
optimum.BackPrev = i;
optimum.Prev1IsChar = false;
}
}
while (--repLen >= 2);
}
UInt32 normalMatchPrice = matchPrice + _isRep[_state.Index].GetPrice0();
len = ((repLens[0] >= 2) ? repLens[0] + 1 : 2);
if (len <= lenMain)
{
UInt32 offs = 0;
while (len > _matchDistances[offs])
offs += 2;
for (; ; len++)
{
UInt32 distance = _matchDistances[offs + 1];
UInt32 curAndLenPrice = normalMatchPrice + GetPosLenPrice(distance, len, posState);
Optimal optimum = _optimum[len];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = 0;
optimum.BackPrev = distance + LZMABase.kNumRepDistances;
optimum.Prev1IsChar = false;
}
if (len == _matchDistances[offs])
{
offs += 2;
if (offs == numDistancePairs)
break;
}
}
}
UInt32 cur = 0;
while (true)
{
cur++;
if (cur == lenEnd)
return Backward(out backRes, cur);
UInt32 newLen;
ReadMatchDistances(out newLen, out numDistancePairs);
if (newLen >= _numFastBytes)
{
_numDistancePairs = numDistancePairs;
_longestMatchLength = newLen;
_longestMatchWasFound = true;
return Backward(out backRes, cur);
}
position++;
UInt32 posPrev = _optimum[cur].PosPrev;
LZMABase.State state;
if (_optimum[cur].Prev1IsChar)
{
posPrev--;
if (_optimum[cur].Prev2)
{
state = _optimum[_optimum[cur].PosPrev2].State;
if (_optimum[cur].BackPrev2 < LZMABase.kNumRepDistances)
state.UpdateRep();
else
state.UpdateMatch();
}
else
state = _optimum[posPrev].State;
state.UpdateChar();
}
else
state = _optimum[posPrev].State;
if (posPrev == cur - 1)
{
if (_optimum[cur].IsShortRep())
state.UpdateShortRep();
else
state.UpdateChar();
}
else
{
UInt32 pos;
if (_optimum[cur].Prev1IsChar && _optimum[cur].Prev2)
{
posPrev = _optimum[cur].PosPrev2;
pos = _optimum[cur].BackPrev2;
state.UpdateRep();
}
else
{
pos = _optimum[cur].BackPrev;
if (pos < LZMABase.kNumRepDistances)
state.UpdateRep();
else
state.UpdateMatch();
}
Optimal opt = _optimum[posPrev];
if (pos < LZMABase.kNumRepDistances)
{
if (pos == 0)
{
reps[0] = opt.Backs0;
reps[1] = opt.Backs1;
reps[2] = opt.Backs2;
reps[3] = opt.Backs3;
}
else if (pos == 1)
{
reps[0] = opt.Backs1;
reps[1] = opt.Backs0;
reps[2] = opt.Backs2;
reps[3] = opt.Backs3;
}
else if (pos == 2)
{
reps[0] = opt.Backs2;
reps[1] = opt.Backs0;
reps[2] = opt.Backs1;
reps[3] = opt.Backs3;
}
else
{
reps[0] = opt.Backs3;
reps[1] = opt.Backs0;
reps[2] = opt.Backs1;
reps[3] = opt.Backs2;
}
}
else
{
reps[0] = (pos - LZMABase.kNumRepDistances);
reps[1] = opt.Backs0;
reps[2] = opt.Backs1;
reps[3] = opt.Backs2;
}
}
_optimum[cur].State = state;
_optimum[cur].Backs0 = reps[0];
_optimum[cur].Backs1 = reps[1];
_optimum[cur].Backs2 = reps[2];
_optimum[cur].Backs3 = reps[3];
UInt32 curPrice = _optimum[cur].Price;
currentByte = _matchFinder.GetIndexByte(0 - 1);
matchByte = _matchFinder.GetIndexByte((Int32)(0 - reps[0] - 1 - 1));
posState = (position & _posStateMask);
UInt32 curAnd1Price = curPrice +
_isMatch[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice0() +
_literalEncoder.GetSubCoder(position, _matchFinder.GetIndexByte(0 - 2)).
GetPrice(!state.IsCharState(), matchByte, currentByte);
Optimal nextOptimum = _optimum[cur + 1];
bool nextIsChar = false;
if (curAnd1Price < nextOptimum.Price)
{
nextOptimum.Price = curAnd1Price;
nextOptimum.PosPrev = cur;
nextOptimum.MakeAsChar();
nextIsChar = true;
}
matchPrice = curPrice + _isMatch[(state.Index << LZMABase.kNumPosStatesBitsMax) + posState].GetPrice1();
repMatchPrice = matchPrice + _isRep[state.Index].GetPrice1();
if (matchByte == currentByte &&
!(nextOptimum.PosPrev < cur && nextOptimum.BackPrev == 0))
{
UInt32 shortRepPrice = repMatchPrice + GetRepLen1Price(state, posState);
if (shortRepPrice <= nextOptimum.Price)
{
nextOptimum.Price = shortRepPrice;
nextOptimum.PosPrev = cur;
nextOptimum.MakeAsShortRep();
nextIsChar = true;
}
}
UInt32 numAvailableBytesFull = _matchFinder.GetNumAvailableBytes() + 1;
numAvailableBytesFull = Math.Min(kNumOpts - 1 - cur, numAvailableBytesFull);
numAvailableBytes = numAvailableBytesFull;
if (numAvailableBytes < 2)
continue;
if (numAvailableBytes > _numFastBytes)
numAvailableBytes = _numFastBytes;
if (!nextIsChar && matchByte != currentByte)
{
// try Literal + rep0
UInt32 t = Math.Min(numAvailableBytesFull - 1, _numFastBytes);
UInt32 lenTest2 = _matchFinder.GetMatchLen(0, reps[0], t);
if (lenTest2 >= 2)
{
LZMABase.State state2 = state;
state2.UpdateChar();
UInt32 posStateNext = (position + 1) & _posStateMask;
UInt32 nextRepMatchPrice = curAnd1Price +
_isMatch[(state2.Index << LZMABase.kNumPosStatesBitsMax) + posStateNext].GetPrice1() +
_isRep[state2.Index].GetPrice1();
{
UInt32 offset = cur + 1 + lenTest2;
while (lenEnd < offset)
_optimum[++lenEnd].Price = kIfinityPrice;
UInt32 curAndLenPrice = nextRepMatchPrice + GetRepPrice(
0, lenTest2, state2, posStateNext);
Optimal optimum = _optimum[offset];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = cur + 1;
optimum.BackPrev = 0;
optimum.Prev1IsChar = true;
optimum.Prev2 = false;
}
}
}
}
UInt32 startLen = 2; // speed optimization
for (UInt32 repIndex = 0; repIndex < LZMABase.kNumRepDistances; repIndex++)
{
UInt32 lenTest = _matchFinder.GetMatchLen(0 - 1, reps[repIndex], numAvailableBytes);
if (lenTest < 2)
continue;
UInt32 lenTestTemp = lenTest;
do
{
while (lenEnd < cur + lenTest)
_optimum[++lenEnd].Price = kIfinityPrice;
UInt32 curAndLenPrice = repMatchPrice + GetRepPrice(repIndex, lenTest, state, posState);
Optimal optimum = _optimum[cur + lenTest];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = cur;
optimum.BackPrev = repIndex;
optimum.Prev1IsChar = false;
}
}
while (--lenTest >= 2);
lenTest = lenTestTemp;
if (repIndex == 0)
startLen = lenTest + 1;
// if (_maxMode)
if (lenTest < numAvailableBytesFull)
{
UInt32 t = Math.Min(numAvailableBytesFull - 1 - lenTest, _numFastBytes);
UInt32 lenTest2 = _matchFinder.GetMatchLen((Int32)lenTest, reps[repIndex], t);
if (lenTest2 >= 2)
{
LZMABase.State state2 = state;
state2.UpdateRep();
UInt32 posStateNext = (position + lenTest) & _posStateMask;
UInt32 curAndLenCharPrice =
repMatchPrice + GetRepPrice(repIndex, lenTest, state, posState) +
_isMatch[(state2.Index << LZMABase.kNumPosStatesBitsMax) + posStateNext].GetPrice0() +
_literalEncoder.GetSubCoder(position + lenTest,
_matchFinder.GetIndexByte((Int32)lenTest - 1 - 1)).GetPrice(true,
_matchFinder.GetIndexByte((Int32)((Int32)lenTest - 1 - (Int32)(reps[repIndex] + 1))),
_matchFinder.GetIndexByte((Int32)lenTest - 1));
state2.UpdateChar();
posStateNext = (position + lenTest + 1) & _posStateMask;
UInt32 nextMatchPrice = curAndLenCharPrice + _isMatch[(state2.Index << LZMABase.kNumPosStatesBitsMax) + posStateNext].GetPrice1();
UInt32 nextRepMatchPrice = nextMatchPrice + _isRep[state2.Index].GetPrice1();
// for(; lenTest2 >= 2; lenTest2--)
{
UInt32 offset = lenTest + 1 + lenTest2;
while (lenEnd < cur + offset)
_optimum[++lenEnd].Price = kIfinityPrice;
UInt32 curAndLenPrice = nextRepMatchPrice + GetRepPrice(0, lenTest2, state2, posStateNext);
Optimal optimum = _optimum[cur + offset];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = cur + lenTest + 1;
optimum.BackPrev = 0;
optimum.Prev1IsChar = true;
optimum.Prev2 = true;
optimum.PosPrev2 = cur;
optimum.BackPrev2 = repIndex;
}
}
}
}
}
if (newLen > numAvailableBytes)
{
newLen = numAvailableBytes;
for (numDistancePairs = 0; newLen > _matchDistances[numDistancePairs]; numDistancePairs += 2) ;
_matchDistances[numDistancePairs] = newLen;
numDistancePairs += 2;
}
if (newLen >= startLen)
{
normalMatchPrice = matchPrice + _isRep[state.Index].GetPrice0();
while (lenEnd < cur + newLen)
_optimum[++lenEnd].Price = kIfinityPrice;
UInt32 offs = 0;
while (startLen > _matchDistances[offs])
offs += 2;
for (UInt32 lenTest = startLen; ; lenTest++)
{
UInt32 curBack = _matchDistances[offs + 1];
UInt32 curAndLenPrice = normalMatchPrice + GetPosLenPrice(curBack, lenTest, posState);
Optimal optimum = _optimum[cur + lenTest];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = cur;
optimum.BackPrev = curBack + LZMABase.kNumRepDistances;
optimum.Prev1IsChar = false;
}
if (lenTest == _matchDistances[offs])
{
if (lenTest < numAvailableBytesFull)
{
UInt32 t = Math.Min(numAvailableBytesFull - 1 - lenTest, _numFastBytes);
UInt32 lenTest2 = _matchFinder.GetMatchLen((Int32)lenTest, curBack, t);
if (lenTest2 >= 2)
{
LZMABase.State state2 = state;
state2.UpdateMatch();
UInt32 posStateNext = (position + lenTest) & _posStateMask;
UInt32 curAndLenCharPrice = curAndLenPrice +
_isMatch[(state2.Index << LZMABase.kNumPosStatesBitsMax) + posStateNext].GetPrice0() +
_literalEncoder.GetSubCoder(position + lenTest,
_matchFinder.GetIndexByte((Int32)lenTest - 1 - 1)).
GetPrice(true,
_matchFinder.GetIndexByte((Int32)lenTest - (Int32)(curBack + 1) - 1),
_matchFinder.GetIndexByte((Int32)lenTest - 1));
state2.UpdateChar();
posStateNext = (position + lenTest + 1) & _posStateMask;
UInt32 nextMatchPrice = curAndLenCharPrice + _isMatch[(state2.Index << LZMABase.kNumPosStatesBitsMax) + posStateNext].GetPrice1();
UInt32 nextRepMatchPrice = nextMatchPrice + _isRep[state2.Index].GetPrice1();
UInt32 offset = lenTest + 1 + lenTest2;
while (lenEnd < cur + offset)
_optimum[++lenEnd].Price = kIfinityPrice;
curAndLenPrice = nextRepMatchPrice + GetRepPrice(0, lenTest2, state2, posStateNext);
optimum = _optimum[cur + offset];
if (curAndLenPrice < optimum.Price)
{
optimum.Price = curAndLenPrice;
optimum.PosPrev = cur + lenTest + 1;
optimum.BackPrev = 0;
optimum.Prev1IsChar = true;
optimum.Prev2 = true;
optimum.PosPrev2 = cur;
optimum.BackPrev2 = curBack + LZMABase.kNumRepDistances;
}
}
}
offs += 2;
if (offs == numDistancePairs)
break;
}
}
}
}
}
bool ChangePair(UInt32 smallDist, UInt32 bigDist)
{
const int kDif = 7;
return (smallDist < ((UInt32)(1) << (32 - kDif)) && bigDist >= (smallDist << kDif));
}
void WriteEndMarker(UInt32 posState)
{
if (!_writeEndMark)
return;
_isMatch[(_state.Index << LZMABase.kNumPosStatesBitsMax) + posState].Encode(_rangeEncoder, 1);
_isRep[_state.Index].Encode(_rangeEncoder, 0);
_state.UpdateMatch();
UInt32 len = LZMABase.kMatchMinLen;
_lenEncoder.Encode(_rangeEncoder, len - LZMABase.kMatchMinLen, posState);
UInt32 posSlot = (1 << LZMABase.kNumPosSlotBits) - 1;
UInt32 lenToPosState = LZMABase.GetLenToPosState(len);
_posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
int footerBits = 30;
UInt32 posReduced = (((UInt32)1) << footerBits) - 1;
_rangeEncoder.EncodeDirectBits(posReduced >> LZMABase.kNumAlignBits, footerBits - LZMABase.kNumAlignBits);
_posAlignEncoder.ReverseEncode(_rangeEncoder, posReduced & LZMABase.kAlignMask);
}
void Flush(UInt32 nowPos)
{
ReleaseMFStream();
WriteEndMarker(nowPos & _posStateMask);
_rangeEncoder.FlushData();
_rangeEncoder.FlushStream();
}
public void CodeOneBlock(out Int64 inSize, out Int64 outSize, out bool finished)
{
inSize = 0;
outSize = 0;
finished = true;
if (_inStream != null)
{
_matchFinder.SetStream(_inStream);
_matchFinder.Init();
_needReleaseMFStream = true;
_inStream = null;
}
if (_finished)
return;
_finished = true;
Int64 progressPosValuePrev = nowPos64;
if (nowPos64 == 0)
{
if (_matchFinder.GetNumAvailableBytes() == 0)
{
Flush((UInt32)nowPos64);
return;
}
UInt32 len, numDistancePairs; // it's not used
ReadMatchDistances(out len, out numDistancePairs);
UInt32 posState = (UInt32)(nowPos64) & _posStateMask;
_isMatch[(_state.Index << LZMABase.kNumPosStatesBitsMax) + posState].Encode(_rangeEncoder, 0);
_state.UpdateChar();
Byte curByte = _matchFinder.GetIndexByte((Int32)(0 - _additionalOffset));
_literalEncoder.GetSubCoder((UInt32)(nowPos64), _previousByte).Encode(_rangeEncoder, curByte);
_previousByte = curByte;
_additionalOffset--;
nowPos64++;
}
if (_matchFinder.GetNumAvailableBytes() == 0)
{
Flush((UInt32)nowPos64);
return;
}
while (true)
{
UInt32 pos;
UInt32 len = GetOptimum((UInt32)nowPos64, out pos);
UInt32 posState = ((UInt32)nowPos64) & _posStateMask;
UInt32 complexState = (_state.Index << LZMABase.kNumPosStatesBitsMax) + posState;
if (len == 1 && pos == 0xFFFFFFFF)
{
_isMatch[complexState].Encode(_rangeEncoder, 0);
Byte curByte = _matchFinder.GetIndexByte((Int32)(0 - _additionalOffset));
LiteralEncoder.Encoder2 subCoder = _literalEncoder.GetSubCoder((UInt32)nowPos64, _previousByte);
if (!_state.IsCharState())
{
Byte matchByte = _matchFinder.GetIndexByte((Int32)(0 - _repDistances[0] - 1 - _additionalOffset));
subCoder.EncodeMatched(_rangeEncoder, matchByte, curByte);
}
else
subCoder.Encode(_rangeEncoder, curByte);
_previousByte = curByte;
_state.UpdateChar();
}
else
{
_isMatch[complexState].Encode(_rangeEncoder, 1);
if (pos < LZMABase.kNumRepDistances)
{
_isRep[_state.Index].Encode(_rangeEncoder, 1);
if (pos == 0)
{
_isRepG0[_state.Index].Encode(_rangeEncoder, 0);
if (len == 1)
_isRep0Long[complexState].Encode(_rangeEncoder, 0);
else
_isRep0Long[complexState].Encode(_rangeEncoder, 1);
}
else
{
_isRepG0[_state.Index].Encode(_rangeEncoder, 1);
if (pos == 1)
_isRepG1[_state.Index].Encode(_rangeEncoder, 0);
else
{
_isRepG1[_state.Index].Encode(_rangeEncoder, 1);
_isRepG2[_state.Index].Encode(_rangeEncoder, pos - 2);
}
}
if (len == 1)
_state.UpdateShortRep();
else
{
_repMatchLenEncoder.Encode(_rangeEncoder, len - LZMABase.kMatchMinLen, posState);
_state.UpdateRep();
}
UInt32 distance = _repDistances[pos];
if (pos != 0)
{
for (UInt32 i = pos; i >= 1; i--)
_repDistances[i] = _repDistances[i - 1];
_repDistances[0] = distance;
}
}
else
{
_isRep[_state.Index].Encode(_rangeEncoder, 0);
_state.UpdateMatch();
_lenEncoder.Encode(_rangeEncoder, len - LZMABase.kMatchMinLen, posState);
pos -= LZMABase.kNumRepDistances;
UInt32 posSlot = GetPosSlot(pos);
UInt32 lenToPosState = LZMABase.GetLenToPosState(len);
_posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
if (posSlot >= LZMABase.kStartPosModelIndex)
{
int footerBits = (int)((posSlot >> 1) - 1);
UInt32 baseVal = ((2 | (posSlot & 1)) << footerBits);
UInt32 posReduced = pos - baseVal;
if (posSlot < LZMABase.kEndPosModelIndex)
LZMARangeBitTreeEncoder.ReverseEncode(_posEncoders, baseVal - posSlot - 1, _rangeEncoder, footerBits, posReduced);
else
{
_rangeEncoder.EncodeDirectBits(posReduced >> LZMABase.kNumAlignBits, footerBits - LZMABase.kNumAlignBits);
_posAlignEncoder.ReverseEncode(_rangeEncoder, posReduced & LZMABase.kAlignMask);
_alignPriceCount++;
}
}
UInt32 distance = pos;
for (UInt32 i = LZMABase.kNumRepDistances - 1; i >= 1; i--)
_repDistances[i] = _repDistances[i - 1];
_repDistances[0] = distance;
_matchPriceCount++;
}
_previousByte = _matchFinder.GetIndexByte((Int32)(len - 1 - _additionalOffset));
}
_additionalOffset -= len;
nowPos64 += len;
if (_additionalOffset == 0)
{
// if (!_fastMode)
if (_matchPriceCount >= (1 << 7))
FillDistancesPrices();
if (_alignPriceCount >= LZMABase.kAlignTableSize)
FillAlignPrices();
inSize = nowPos64;
outSize = _rangeEncoder.GetProcessedSizeAdd();
if (_matchFinder.GetNumAvailableBytes() == 0)
{
Flush((UInt32)nowPos64);
return;
}
if (nowPos64 - progressPosValuePrev >= (1 << 12))
{
_finished = false;
finished = false;
return;
}
}
}
}
void ReleaseMFStream()
{
if (_matchFinder != null && _needReleaseMFStream)
{
_matchFinder.ReleaseStream();
_needReleaseMFStream = false;
}
}
void SetOutStream(System.IO.Stream outStream) { _rangeEncoder.SetStream(outStream); }
void ReleaseOutStream() { _rangeEncoder.ReleaseStream(); }
void ReleaseStreams()
{
ReleaseMFStream();
ReleaseOutStream();
}
void SetStreams(System.IO.Stream inStream, System.IO.Stream outStream,
Int64 inSize, Int64 outSize)
{
_inStream = inStream;
_finished = false;
Create();
SetOutStream(outStream);
Init();
// if (!_fastMode)
{
FillDistancesPrices();
FillAlignPrices();
}
_lenEncoder.SetTableSize(_numFastBytes + 1 - LZMABase.kMatchMinLen);
_lenEncoder.UpdateTables((UInt32)1 << _posStateBits);
_repMatchLenEncoder.SetTableSize(_numFastBytes + 1 - LZMABase.kMatchMinLen);
_repMatchLenEncoder.UpdateTables((UInt32)1 << _posStateBits);
nowPos64 = 0;
}
public override void Code(System.IO.Stream inStream, System.IO.Stream outStream, Int64 inSize, Int64 outSize, ICodeProgress progress)
{
_needReleaseMFStream = false;
try
{
SetStreams(inStream, outStream, inSize, outSize);
while (true)
{
Int64 processedInSize;
Int64 processedOutSize;
bool finished;
CodeOneBlock(out processedInSize, out processedOutSize, out finished);
if (finished)
return;
if (progress != null)
{
progress.SetProgress(processedInSize, processedOutSize);
}
}
}
finally
{
ReleaseStreams();
}
}
const int kPropSize = 5;
Byte[] properties = new Byte[kPropSize];
public void WriteCoderProperties(System.IO.Stream outStream)
{
properties[0] = (Byte)((_posStateBits * 5 + _numLiteralPosStateBits) * 9 + _numLiteralContextBits);
for (int i = 0; i < 4; i++)
properties[1 + i] = (Byte)(_dictionarySize >> (8 * i));
outStream.Write(properties, 0, kPropSize);
}
UInt32[] tempPrices = new UInt32[LZMABase.kNumFullDistances];
UInt32 _matchPriceCount;
void FillDistancesPrices()
{
for (UInt32 i = LZMABase.kStartPosModelIndex; i < LZMABase.kNumFullDistances; i++)
{
UInt32 posSlot = GetPosSlot(i);
int footerBits = (int)((posSlot >> 1) - 1);
UInt32 baseVal = ((2 | (posSlot & 1)) << footerBits);
tempPrices[i] = LZMARangeBitTreeEncoder.ReverseGetPrice(_posEncoders, baseVal - posSlot - 1, footerBits, i - baseVal);
}
for (UInt32 lenToPosState = 0; lenToPosState < LZMABase.kNumLenToPosStates; lenToPosState++)
{
UInt32 posSlot;
LZMARangeBitTreeEncoder encoder = _posSlotEncoder[lenToPosState];
UInt32 st = (lenToPosState << LZMABase.kNumPosSlotBits);
for (posSlot = 0; posSlot < _distTableSize; posSlot++)
_posSlotPrices[st + posSlot] = encoder.GetPrice(posSlot);
for (posSlot = LZMABase.kEndPosModelIndex; posSlot < _distTableSize; posSlot++)
_posSlotPrices[st + posSlot] += ((((posSlot >> 1) - 1) - LZMABase.kNumAlignBits) << LZMARangeBitEncoder.kNumBitPriceShiftBits);
UInt32 st2 = lenToPosState * LZMABase.kNumFullDistances;
UInt32 i;
for (i = 0; i < LZMABase.kStartPosModelIndex; i++)
_distancesPrices[st2 + i] = _posSlotPrices[st + i];
for (; i < LZMABase.kNumFullDistances; i++)
_distancesPrices[st2 + i] = _posSlotPrices[st + GetPosSlot(i)] + tempPrices[i];
}
_matchPriceCount = 0;
}
void FillAlignPrices()
{
for (UInt32 i = 0; i < LZMABase.kAlignTableSize; i++)
_alignPrices[i] = _posAlignEncoder.ReverseGetPrice(i);
_alignPriceCount = 0;
}
static string[] kMatchFinderIDs =
{
"BT2",
"BT4",
};
static int FindMatchFinder(string s)
{
for (int m = 0; m < kMatchFinderIDs.Length; m++)
if (s == kMatchFinderIDs[m])
return m;
return -1;
}
public void SetCoderProperties(CoderPropID[] propIDs, object[] properties)
{
for (UInt32 i = 0; i < properties.Length; i++)
{
object prop = properties[i];
switch (propIDs[i])
{
case CoderPropID.NumFastBytes:
{
if (!(prop is Int32))
throw new Exception();
Int32 numFastBytes = (Int32)prop;
if (numFastBytes < 5 || numFastBytes > LZMABase.kMatchMaxLen)
throw new Exception();
_numFastBytes = (UInt32)numFastBytes;
break;
}
case CoderPropID.Algorithm:
{
break;
}
case CoderPropID.MatchFinder:
{
if (!(prop is String))
throw new Exception();
EMatchFinderType matchFinderIndexPrev = _matchFinderType;
int m = FindMatchFinder(((string)prop).ToUpper());
if (m < 0)
throw new Exception();
_matchFinderType = (EMatchFinderType)m;
if (_matchFinder != null && matchFinderIndexPrev != _matchFinderType)
{
_dictionarySizePrev = 0xFFFFFFFF;
_matchFinder = null;
}
break;
}
case CoderPropID.DictionarySize:
{
const int kDicLogSizeMaxCompress = 30;
if (!(prop is Int32))
throw new Exception(); ;
Int32 dictionarySize = (Int32)prop;
if (dictionarySize < (UInt32)(1 << LZMABase.kDicLogSizeMin) ||
dictionarySize > (UInt32)(1 << kDicLogSizeMaxCompress))
throw new Exception();
_dictionarySize = (UInt32)dictionarySize;
int dicLogSize;
for (dicLogSize = 0; dicLogSize < (UInt32)kDicLogSizeMaxCompress; dicLogSize++)
if (dictionarySize <= ((UInt32)(1) << dicLogSize))
break;
_distTableSize = (UInt32)dicLogSize * 2;
break;
}
case CoderPropID.PosStateBits:
{
if (!(prop is Int32))
throw new Exception();
Int32 v = (Int32)prop;
if (v < 0 || v > (UInt32)LZMABase.kNumPosStatesBitsEncodingMax)
throw new Exception();
_posStateBits = (int)v;
_posStateMask = (((UInt32)1) << (int)_posStateBits) - 1;
break;
}
case CoderPropID.LitPosBits:
{
if (!(prop is Int32))
throw new Exception();
Int32 v = (Int32)prop;
if (v < 0 || v > (UInt32)LZMABase.kNumLitPosStatesBitsEncodingMax)
throw new Exception();
_numLiteralPosStateBits = (int)v;
break;
}
case CoderPropID.LitContextBits:
{
if (!(prop is Int32))
throw new Exception();
Int32 v = (Int32)prop;
if (v < 0 || v > (UInt32)LZMABase.kNumLitContextBitsMax)
throw new Exception(); ;
_numLiteralContextBits = (int)v;
break;
}
case CoderPropID.EndMarker:
{
if (!(prop is Boolean))
throw new Exception();
SetWriteEndMarkerMode((Boolean)prop);
break;
}
default:
throw new Exception();
}
}
}
}
#endregion
#endregion
#region LZ
#region IInWindowStream
private abstract class IInWindowStream
{
public abstract void SetStream(System.IO.Stream inStream);
public abstract void Init();
public abstract void ReleaseStream();
public abstract Byte GetIndexByte(Int32 index);
public abstract UInt32 GetMatchLen(Int32 index, UInt32 distance, UInt32 limit);
public abstract UInt32 GetNumAvailableBytes();
}
#endregion
#region IMatchFinder
private abstract class IMatchFinder : IInWindowStream
{
public abstract void Create(UInt32 historySize, UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter);
public abstract UInt32 GetMatches(UInt32[] distances);
public abstract void Skip(UInt32 num);
}
#endregion
#region LZBinTree
private class LZBinTree : LZInWindow
{
UInt32 _cyclicBufferPos;
UInt32 _cyclicBufferSize = 0;
UInt32 _matchMaxLen;
UInt32[] _son;
UInt32[] _hash;
UInt32 _cutValue = 0xFF;
UInt32 _hashMask;
UInt32 _hashSizeSum = 0;
bool HASH_ARRAY = true;
const UInt32 kHash2Size = 1 << 10;
const UInt32 kHash3Size = 1 << 16;
const UInt32 kBT2HashSize = 1 << 16;
const UInt32 kStartMaxLen = 1;
const UInt32 kHash3Offset = kHash2Size;
const UInt32 kEmptyHashValue = 0;
const UInt32 kMaxValForNormalize = ((UInt32)1 << 31) - 1;
UInt32 kNumHashDirectBytes = 0;
UInt32 kMinMatchCheck = 4;
UInt32 kFixHashSize = kHash2Size + kHash3Size;
public void SetType(int numHashBytes)
{
HASH_ARRAY = (numHashBytes > 2);
if (HASH_ARRAY)
{
kNumHashDirectBytes = 0;
kMinMatchCheck = 4;
kFixHashSize = kHash2Size + kHash3Size;
}
else
{
kNumHashDirectBytes = 2;
kMinMatchCheck = 2 + 1;
kFixHashSize = 0;
}
}
public new void SetStream(System.IO.Stream stream) { base.SetStream(stream); }
public new void ReleaseStream() { base.ReleaseStream(); }
public new void Init()
{
base.Init();
for (UInt32 i = 0; i < _hashSizeSum; i++)
_hash[i] = kEmptyHashValue;
_cyclicBufferPos = 0;
ReduceOffsets(-1);
}
public new void MovePos()
{
if (++_cyclicBufferPos >= _cyclicBufferSize)
_cyclicBufferPos = 0;
base.MovePos();
if (_pos == kMaxValForNormalize)
Normalize();
}
public new Byte GetIndexByte(Int32 index) { return base.GetIndexByte(index); }
public new UInt32 GetMatchLen(Int32 index, UInt32 distance, UInt32 limit)
{ return base.GetMatchLen(index, distance, limit); }
public new UInt32 GetNumAvailableBytes() { return base.GetNumAvailableBytes(); }
public void Create(UInt32 historySize, UInt32 keepAddBufferBefore,
UInt32 matchMaxLen, UInt32 keepAddBufferAfter)
{
if (historySize > kMaxValForNormalize - 256)
throw new Exception();
_cutValue = 16 + (matchMaxLen >> 1);
UInt32 windowReservSize = (historySize + keepAddBufferBefore +
matchMaxLen + keepAddBufferAfter) / 2 + 256;
base.Create(historySize + keepAddBufferBefore, matchMaxLen + keepAddBufferAfter, windowReservSize);
_matchMaxLen = matchMaxLen;
UInt32 cyclicBufferSize = historySize + 1;
if (_cyclicBufferSize != cyclicBufferSize)
_son = new UInt32[(_cyclicBufferSize = cyclicBufferSize) * 2];
UInt32 hs = kBT2HashSize;
if (HASH_ARRAY)
{
hs = historySize - 1;
hs |= (hs >> 1);
hs |= (hs >> 2);
hs |= (hs >> 4);
hs |= (hs >> 8);
hs >>= 1;
hs |= 0xFFFF;
if (hs > (1 << 24))
hs >>= 1;
_hashMask = hs;
hs++;
hs += kFixHashSize;
}
if (hs != _hashSizeSum)
_hash = new UInt32[_hashSizeSum = hs];
}
public UInt32 GetMatches(UInt32[] distances)
{
UInt32 lenLimit;
if (_pos + _matchMaxLen <= _streamPos)
lenLimit = _matchMaxLen;
else
{
lenLimit = _streamPos - _pos;
if (lenLimit < kMinMatchCheck)
{
MovePos();
return 0;
}
}
UInt32 offset = 0;
UInt32 matchMinPos = (_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0;
UInt32 cur = _bufferOffset + _pos;
UInt32 maxLen = kStartMaxLen; // to avoid items for len < hashSize;
UInt32 hashValue, hash2Value = 0, hash3Value = 0;
if (HASH_ARRAY)
{
UInt32 temp = CRC.Table[_bufferBase[cur]] ^ _bufferBase[cur + 1];
hash2Value = temp & (kHash2Size - 1);
temp ^= ((UInt32)(_bufferBase[cur + 2]) << 8);
hash3Value = temp & (kHash3Size - 1);
hashValue = (temp ^ (CRC.Table[_bufferBase[cur + 3]] << 5)) & _hashMask;
}
else
hashValue = _bufferBase[cur] ^ ((UInt32)(_bufferBase[cur + 1]) << 8);
UInt32 curMatch = _hash[kFixHashSize + hashValue];
if (HASH_ARRAY)
{
UInt32 curMatch2 = _hash[hash2Value];
UInt32 curMatch3 = _hash[kHash3Offset + hash3Value];
_hash[hash2Value] = _pos;
_hash[kHash3Offset + hash3Value] = _pos;
if (curMatch2 > matchMinPos)
if (_bufferBase[_bufferOffset + curMatch2] == _bufferBase[cur])
{
distances[offset++] = maxLen = 2;
distances[offset++] = _pos - curMatch2 - 1;
}
if (curMatch3 > matchMinPos)
if (_bufferBase[_bufferOffset + curMatch3] == _bufferBase[cur])
{
if (curMatch3 == curMatch2)
offset -= 2;
distances[offset++] = maxLen = 3;
distances[offset++] = _pos - curMatch3 - 1;
curMatch2 = curMatch3;
}
if (offset != 0 && curMatch2 == curMatch)
{
offset -= 2;
maxLen = kStartMaxLen;
}
}
_hash[kFixHashSize + hashValue] = _pos;
UInt32 ptr0 = (_cyclicBufferPos << 1) + 1;
UInt32 ptr1 = (_cyclicBufferPos << 1);
UInt32 len0, len1;
len0 = len1 = kNumHashDirectBytes;
if (kNumHashDirectBytes != 0)
{
if (curMatch > matchMinPos)
{
if (_bufferBase[_bufferOffset + curMatch + kNumHashDirectBytes] !=
_bufferBase[cur + kNumHashDirectBytes])
{
distances[offset++] = maxLen = kNumHashDirectBytes;
distances[offset++] = _pos - curMatch - 1;
}
}
}
UInt32 count = _cutValue;
while (true)
{
if (curMatch <= matchMinPos || count-- == 0)
{
_son[ptr0] = _son[ptr1] = kEmptyHashValue;
break;
}
UInt32 delta = _pos - curMatch;
UInt32 cyclicPos = ((delta <= _cyclicBufferPos) ?
(_cyclicBufferPos - delta) :
(_cyclicBufferPos - delta + _cyclicBufferSize)) << 1;
UInt32 pby1 = _bufferOffset + curMatch;
UInt32 len = Math.Min(len0, len1);
if (_bufferBase[pby1 + len] == _bufferBase[cur + len])
{
while (++len != lenLimit)
if (_bufferBase[pby1 + len] != _bufferBase[cur + len])
break;
if (maxLen < len)
{
distances[offset++] = maxLen = len;
distances[offset++] = delta - 1;
if (len == lenLimit)
{
_son[ptr1] = _son[cyclicPos];
_son[ptr0] = _son[cyclicPos + 1];
break;
}
}
}
if (_bufferBase[pby1 + len] < _bufferBase[cur + len])
{
_son[ptr1] = curMatch;
ptr1 = cyclicPos + 1;
curMatch = _son[ptr1];
len1 = len;
}
else
{
_son[ptr0] = curMatch;
ptr0 = cyclicPos;
curMatch = _son[ptr0];
len0 = len;
}
}
MovePos();
return offset;
}
public void Skip(UInt32 num)
{
do
{
UInt32 lenLimit;
if (_pos + _matchMaxLen <= _streamPos)
lenLimit = _matchMaxLen;
else
{
lenLimit = _streamPos - _pos;
if (lenLimit < kMinMatchCheck)
{
MovePos();
continue;
}
}
UInt32 matchMinPos = (_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0;
UInt32 cur = _bufferOffset + _pos;
UInt32 hashValue;
if (HASH_ARRAY)
{
UInt32 temp = CRC.Table[_bufferBase[cur]] ^ _bufferBase[cur + 1];
UInt32 hash2Value = temp & (kHash2Size - 1);
_hash[hash2Value] = _pos;
temp ^= ((UInt32)(_bufferBase[cur + 2]) << 8);
UInt32 hash3Value = temp & (kHash3Size - 1);
_hash[kHash3Offset + hash3Value] = _pos;
hashValue = (temp ^ (CRC.Table[_bufferBase[cur + 3]] << 5)) & _hashMask;
}
else
hashValue = _bufferBase[cur] ^ ((UInt32)(_bufferBase[cur + 1]) << 8);
UInt32 curMatch = _hash[kFixHashSize + hashValue];
_hash[kFixHashSize + hashValue] = _pos;
UInt32 ptr0 = (_cyclicBufferPos << 1) + 1;
UInt32 ptr1 = (_cyclicBufferPos << 1);
UInt32 len0, len1;
len0 = len1 = kNumHashDirectBytes;
UInt32 count = _cutValue;
while (true)
{
if (curMatch <= matchMinPos || count-- == 0)
{
_son[ptr0] = _son[ptr1] = kEmptyHashValue;
break;
}
UInt32 delta = _pos - curMatch;
UInt32 cyclicPos = ((delta <= _cyclicBufferPos) ?
(_cyclicBufferPos - delta) :
(_cyclicBufferPos - delta + _cyclicBufferSize)) << 1;
UInt32 pby1 = _bufferOffset + curMatch;
UInt32 len = Math.Min(len0, len1);
if (_bufferBase[pby1 + len] == _bufferBase[cur + len])
{
while (++len != lenLimit)
if (_bufferBase[pby1 + len] != _bufferBase[cur + len])
break;
if (len == lenLimit)
{
_son[ptr1] = _son[cyclicPos];
_son[ptr0] = _son[cyclicPos + 1];
break;
}
}
if (_bufferBase[pby1 + len] < _bufferBase[cur + len])
{
_son[ptr1] = curMatch;
ptr1 = cyclicPos + 1;
curMatch = _son[ptr1];
len1 = len;
}
else
{
_son[ptr0] = curMatch;
ptr0 = cyclicPos;
curMatch = _son[ptr0];
len0 = len;
}
}
MovePos();
}
while (--num != 0);
}
void NormalizeLinks(UInt32[] items, UInt32 numItems, UInt32 subValue)
{
for (UInt32 i = 0; i < numItems; i++)
{
UInt32 value = items[i];
if (value <= subValue)
value = kEmptyHashValue;
else
value -= subValue;
items[i] = value;
}
}
void Normalize()
{
UInt32 subValue = _pos - _cyclicBufferSize;
NormalizeLinks(_son, _cyclicBufferSize * 2, subValue);
NormalizeLinks(_hash, _hashSizeSum, subValue);
ReduceOffsets((Int32)subValue);
}
public void SetCutValue(UInt32 cutValue) { _cutValue = cutValue; }
}
#endregion
#region LZInWindow
private class LZInWindow
{
public Byte[] _bufferBase = null;
System.IO.Stream _stream;
UInt32 _posLimit;
bool _streamEndWasReached;
UInt32 _pointerToLastSafePosition;
public UInt32 _bufferOffset;
public UInt32 _blockSize;
public UInt32 _pos;
UInt32 _keepSizeBefore;
UInt32 _keepSizeAfter;
public UInt32 _streamPos;
public void MoveBlock()
{
UInt32 offset = (UInt32)(_bufferOffset) + _pos - _keepSizeBefore;
if (offset > 0)
offset--;
UInt32 numBytes = (UInt32)(_bufferOffset) + _streamPos - offset;
for (UInt32 i = 0; i < numBytes; i++)
_bufferBase[i] = _bufferBase[offset + i];
_bufferOffset -= offset;
}
public virtual void ReadBlock()
{
if (_streamEndWasReached)
return;
while (true)
{
int size = (int)((0 - _bufferOffset) + _blockSize - _streamPos);
if (size == 0)
return;
int numReadBytes = _stream.Read(_bufferBase, (int)(_bufferOffset + _streamPos), size);
if (numReadBytes == 0)
{
_posLimit = _streamPos;
UInt32 pointerToPostion = _bufferOffset + _posLimit;
if (pointerToPostion > _pointerToLastSafePosition)
_posLimit = (UInt32)(_pointerToLastSafePosition - _bufferOffset);
_streamEndWasReached = true;
return;
}
_streamPos += (UInt32)numReadBytes;
if (_streamPos >= _pos + _keepSizeAfter)
_posLimit = _streamPos - _keepSizeAfter;
}
}
void Free() { _bufferBase = null; }
public void Create(UInt32 keepSizeBefore, UInt32 keepSizeAfter, UInt32 keepSizeReserv)
{
_keepSizeBefore = keepSizeBefore;
_keepSizeAfter = keepSizeAfter;
UInt32 blockSize = keepSizeBefore + keepSizeAfter + keepSizeReserv;
if (_bufferBase == null || _blockSize != blockSize)
{
Free();
_blockSize = blockSize;
_bufferBase = new Byte[_blockSize];
}
_pointerToLastSafePosition = _blockSize - keepSizeAfter;
}
public void SetStream(System.IO.Stream stream) { _stream = stream; }
public void ReleaseStream() { _stream = null; }
public void Init()
{
_bufferOffset = 0;
_pos = 0;
_streamPos = 0;
_streamEndWasReached = false;
ReadBlock();
}
public void MovePos()
{
_pos++;
if (_pos > _posLimit)
{
UInt32 pointerToPostion = _bufferOffset + _pos;
if (pointerToPostion > _pointerToLastSafePosition)
MoveBlock();
ReadBlock();
}
}
public Byte GetIndexByte(Int32 index) { return _bufferBase[_bufferOffset + _pos + index]; }
public UInt32 GetMatchLen(Int32 index, UInt32 distance, UInt32 limit)
{
if (_streamEndWasReached)
if ((_pos + index) + limit > _streamPos)
limit = _streamPos - (UInt32)(_pos + index);
distance++;
UInt32 pby = _bufferOffset + _pos + (UInt32)index;
UInt32 i;
for (i = 0; i < limit && _bufferBase[pby + i] == _bufferBase[pby + i - distance]; i++) ;
return i;
}
public UInt32 GetNumAvailableBytes() { return _streamPos - _pos; }
public void ReduceOffsets(Int32 subValue)
{
_bufferOffset += (UInt32)subValue;
_posLimit -= (UInt32)subValue;
_pos -= (UInt32)subValue;
_streamPos -= (UInt32)subValue;
}
}
#endregion
#region LZOutWindow
private class LZOutWindow
{
byte[] _buffer = null;
uint _pos;
uint _windowSize = 0;
uint _streamPos;
System.IO.Stream _stream;
public void Create(uint windowSize)
{
if (_windowSize != windowSize)
{
// System.GC.Collect();
_buffer = new byte[windowSize];
}
_windowSize = windowSize;
_pos = 0;
_streamPos = 0;
}
public void Init(System.IO.Stream stream, bool solid)
{
ReleaseStream();
_stream = stream;
if (!solid)
{
_streamPos = 0;
_pos = 0;
}
}
public void Init(System.IO.Stream stream) { Init(stream, false); }
public void ReleaseStream()
{
Flush();
_stream = null;
}
public void Flush()
{
uint size = _pos - _streamPos;
if (size == 0)
return;
_stream.Write(_buffer, (int)_streamPos, (int)size);
if (_pos >= _windowSize)
_pos = 0;
_streamPos = _pos;
}
public void CopyBlock(uint distance, uint len)
{
uint pos = _pos - distance - 1;
if (pos >= _windowSize)
pos += _windowSize;
for (; len > 0; len--)
{
if (pos >= _windowSize)
pos = 0;
_buffer[_pos++] = _buffer[pos++];
if (_pos >= _windowSize)
Flush();
}
}
public void PutByte(byte b)
{
_buffer[_pos++] = b;
if (_pos >= _windowSize)
Flush();
}
public byte GetByte(uint distance)
{
uint pos = _pos - distance - 1;
if (pos >= _windowSize)
pos += _windowSize;
return _buffer[pos];
}
}
#endregion
#endregion
#region CRC
private class CRC
{
public static readonly uint[] Table;
static CRC()
{
Table = new uint[256];
const uint kPoly = 0xEDB88320;
for (uint i = 0; i < 256; i++)
{
uint r = i;
for (int j = 0; j < 8; j++)
if ((r & 1) != 0)
r = (r >> 1) ^ kPoly;
else
r >>= 1;
Table[i] = r;
}
}
uint _value = 0xFFFFFFFF;
public void Init() { _value = 0xFFFFFFFF; }
public void UpdateByte(byte b)
{
_value = Table[(((byte)(_value)) ^ b)] ^ (_value >> 8);
}
public void Update(byte[] data, uint offset, uint size)
{
for (uint i = 0; i < size; i++)
_value = Table[(((byte)(_value)) ^ data[offset + i])] ^ (_value >> 8);
}
public uint GetDigest() { return _value ^ 0xFFFFFFFF; }
static uint CalculateDigest(byte[] data, uint offset, uint size)
{
CRC crc = new CRC();
crc.Update(data, offset, size);
return crc.GetDigest();
}
static bool VerifyDigest(uint digest, byte[] data, uint offset, uint size)
{
return (CalculateDigest(data, offset, size) == digest);
}
}
#endregion
#region RangeCoder
#region LZMARangeEncoder
private class LZMARangeEncoder
{
public const uint kTopValue = (1 << 24);
System.IO.Stream Stream;
public UInt64 Low;
public uint Range;
uint _cacheSize;
byte _cache;
long StartPosition;
public void SetStream(System.IO.Stream stream)
{
Stream = stream;
}
public void ReleaseStream()
{
Stream = null;
}
public void Init()
{
StartPosition = Stream.Position;
Low = 0;
Range = 0xFFFFFFFF;
_cacheSize = 1;
_cache = 0;
}
public void FlushData()
{
for (int i = 0; i < 5; i++)
ShiftLow();
}
public void FlushStream()
{
Stream.Flush();
}
public void CloseStream()
{
Stream.Close();
}
public void Encode(uint start, uint size, uint total)
{
Low += start * (Range /= total);
Range *= size;
while (Range < kTopValue)
{
Range <<= 8;
ShiftLow();
}
}
public void ShiftLow()
{
if ((uint)Low < (uint)0xFF000000 || (uint)(Low >> 32) == 1)
{
byte temp = _cache;
do
{
Stream.WriteByte((byte)(temp + (Low >> 32)));
temp = 0xFF;
} while (--_cacheSize != 0);
_cache = (byte)(((uint)Low) >> 24);
}
_cacheSize++;
Low = ((uint)Low) << 8;
}
public void EncodeDirectBits(uint v, int numTotalBits)
{
for (int i = numTotalBits - 1; i >= 0; i--)
{
Range >>= 1;
if (((v >> i) & 1) == 1)
Low += Range;
if (Range < kTopValue)
{
Range <<= 8;
ShiftLow();
}
}
}
public void EncodeBit(uint size0, int numTotalBits, uint symbol)
{
uint newBound = (Range >> numTotalBits) * size0;
if (symbol == 0)
Range = newBound;
else
{
Low += newBound;
Range -= newBound;
}
while (Range < kTopValue)
{
Range <<= 8;
ShiftLow();
}
}
public long GetProcessedSizeAdd()
{
return _cacheSize + Stream.Position - StartPosition + 4;
}
}
#endregion
#region LZMARangeDecoder
private class LZMARangeDecoder
{
public const uint kTopValue = (1 << 24);
public uint Range;
public uint Code;
public System.IO.Stream Stream;
public void Init(System.IO.Stream stream)
{
Stream = stream;
Code = 0;
Range = 0xFFFFFFFF;
for (int i = 0; i < 5; i++)
Code = (Code << 8) | (byte)Stream.ReadByte();
}
public void 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;
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;
}
}
#endregion
#region LZMARangeBitEncoder
private struct LZMARangeBitEncoder
{
public const int kNumBitModelTotalBits = 11;
public const uint kBitModelTotal = (1 << kNumBitModelTotalBits);
const int kNumMoveBits = 5;
const int kNumMoveReducingBits = 2;
public const int kNumBitPriceShiftBits = 6;
uint Prob;
public void Init() { Prob = kBitModelTotal >> 1; }
public void UpdateModel(uint symbol)
{
if (symbol == 0)
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
else
Prob -= (Prob) >> kNumMoveBits;
}
public void Encode(LZMARangeEncoder encoder, uint symbol)
{
// encoder.EncodeBit(Prob, kNumBitModelTotalBits, symbol);
// UpdateModel(symbol);
uint newBound = (encoder.Range >> kNumBitModelTotalBits) * Prob;
if (symbol == 0)
{
encoder.Range = newBound;
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
}
else
{
encoder.Low += newBound;
encoder.Range -= newBound;
Prob -= (Prob) >> kNumMoveBits;
}
if (encoder.Range < LZMARangeEncoder.kTopValue)
{
encoder.Range <<= 8;
encoder.ShiftLow();
}
}
private static UInt32[] ProbPrices = new UInt32[kBitModelTotal >> kNumMoveReducingBits];
static LZMARangeBitEncoder()
{
const int kNumBits = (kNumBitModelTotalBits - kNumMoveReducingBits);
for (int i = kNumBits - 1; i >= 0; i--)
{
UInt32 start = (UInt32)1 << (kNumBits - i - 1);
UInt32 end = (UInt32)1 << (kNumBits - i);
for (UInt32 j = start; j < end; j++)
ProbPrices[j] = ((UInt32)i << kNumBitPriceShiftBits) +
(((end - j) << kNumBitPriceShiftBits) >> (kNumBits - i - 1));
}
}
public uint GetPrice(uint symbol)
{
return ProbPrices[(((Prob - symbol) ^ ((-(int)symbol))) & (kBitModelTotal - 1)) >> kNumMoveReducingBits];
}
public uint GetPrice0() { return ProbPrices[Prob >> kNumMoveReducingBits]; }
public uint GetPrice1() { return ProbPrices[(kBitModelTotal - Prob) >> kNumMoveReducingBits]; }
}
#endregion
#region LZMARangeBitDecoder
private struct LZMARangeBitDecoder
{
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(LZMARangeDecoder rangeDecoder)
{
uint newBound = (uint)(rangeDecoder.Range >> kNumBitModelTotalBits) * (uint)Prob;
if (rangeDecoder.Code < newBound)
{
rangeDecoder.Range = newBound;
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
if (rangeDecoder.Range < LZMARangeDecoder.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 < LZMARangeDecoder.kTopValue)
{
rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
rangeDecoder.Range <<= 8;
}
return 1;
}
}
}
#endregion
#region LZMARangeBitTreeEncoder
private struct LZMARangeBitTreeEncoder
{
LZMARangeBitEncoder[] Models;
int NumBitLevels;
public LZMARangeBitTreeEncoder(int numBitLevels)
{
NumBitLevels = numBitLevels;
Models = new LZMARangeBitEncoder[1 << numBitLevels];
}
public void Init()
{
for (uint i = 1; i < (1 << NumBitLevels); i++)
Models[i].Init();
}
public void Encode(LZMARangeEncoder rangeEncoder, UInt32 symbol)
{
UInt32 m = 1;
for (int bitIndex = NumBitLevels; bitIndex > 0; )
{
bitIndex--;
UInt32 bit = (symbol >> bitIndex) & 1;
Models[m].Encode(rangeEncoder, bit);
m = (m << 1) | bit;
}
}
public void ReverseEncode(LZMARangeEncoder rangeEncoder, UInt32 symbol)
{
UInt32 m = 1;
for (UInt32 i = 0; i < NumBitLevels; i++)
{
UInt32 bit = symbol & 1;
Models[m].Encode(rangeEncoder, bit);
m = (m << 1) | bit;
symbol >>= 1;
}
}
public UInt32 GetPrice(UInt32 symbol)
{
UInt32 price = 0;
UInt32 m = 1;
for (int bitIndex = NumBitLevels; bitIndex > 0; )
{
bitIndex--;
UInt32 bit = (symbol >> bitIndex) & 1;
price += Models[m].GetPrice(bit);
m = (m << 1) + bit;
}
return price;
}
public UInt32 ReverseGetPrice(UInt32 symbol)
{
UInt32 price = 0;
UInt32 m = 1;
for (int i = NumBitLevels; i > 0; i--)
{
UInt32 bit = symbol & 1;
symbol >>= 1;
price += Models[m].GetPrice(bit);
m = (m << 1) | bit;
}
return price;
}
public static UInt32 ReverseGetPrice(LZMARangeBitEncoder[] Models, UInt32 startIndex,
int NumBitLevels, UInt32 symbol)
{
UInt32 price = 0;
UInt32 m = 1;
for (int i = NumBitLevels; i > 0; i--)
{
UInt32 bit = symbol & 1;
symbol >>= 1;
price += Models[startIndex + m].GetPrice(bit);
m = (m << 1) | bit;
}
return price;
}
public static void ReverseEncode(LZMARangeBitEncoder[] Models, UInt32 startIndex,
LZMARangeEncoder rangeEncoder, int NumBitLevels, UInt32 symbol)
{
UInt32 m = 1;
for (int i = 0; i < NumBitLevels; i++)
{
UInt32 bit = symbol & 1;
Models[startIndex + m].Encode(rangeEncoder, bit);
m = (m << 1) | bit;
symbol >>= 1;
}
}
}
#endregion
#region LZMARangeBitTreeDecoder
private struct LZMARangeBitTreeDecoder
{
LZMARangeBitDecoder[] Models;
int NumBitLevels;
public LZMARangeBitTreeDecoder(int numBitLevels)
{
NumBitLevels = numBitLevels;
Models = new LZMARangeBitDecoder[1 << numBitLevels];
}
public void Init()
{
for (uint i = 1; i < (1 << NumBitLevels); i++)
Models[i].Init();
}
public uint Decode(LZMARangeDecoder 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(LZMARangeDecoder 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(LZMARangeBitDecoder[] Models, UInt32 startIndex,
LZMARangeDecoder 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;
}
}
#endregion
#endregion
#region ICoder
#region ICodeProgress
private abstract class ICodeProgress
{
/// <summary>
/// Callback progress.
/// </summary>
/// <param name="inSize">
/// input size. -1 if unknown.
/// </param>
/// <param name="outSize">
/// output size. -1 if unknown.
/// </param>
public abstract void SetProgress(Int64 inSize, Int64 outSize);
}
#endregion
#region ICoder
private abstract class 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>
public abstract void Code(Stream inStream, Stream outStream, Int64 inSize, Int64 outSize, ICodeProgress progress);
}
#endregion
#region CoderPropID
/// <summary>
/// Provides the fields that represent properties idenitifiers for compressing.
/// </summary>
private enum CoderPropID
{
/// <summary>
/// Specifies size of dictionary.
/// </summary>
DictionarySize = 0x400,
/// <summary>
/// Specifies size of memory for PPM*.
/// </summary>
UsedMemorySize,
/// <summary>
/// Specifies order for PPM methods.
/// </summary>
Order,
/// <summary>
/// Specifies number of postion state bits for LZMA (0 <= x <= 4).
/// </summary>
PosStateBits = 0x440,
/// <summary>
/// Specifies number of literal context bits for LZMA (0 <= x <= 8).
/// </summary>
LitContextBits,
/// <summary>
/// Specifies number of literal position bits for LZMA (0 <= x <= 4).
/// </summary>
LitPosBits,
/// <summary>
/// Specifies number of fast bytes for LZ*.
/// </summary>
NumFastBytes = 0x450,
/// <summary>
/// Specifies match finder. LZMA: "BT2", "BT4" or "BT4B".
/// </summary>
MatchFinder,
/// <summary>
/// Specifies number of passes.
/// </summary>
NumPasses = 0x460,
/// <summary>
/// Specifies number of algorithm.
/// </summary>
Algorithm = 0x470,
/// <summary>
/// Specifies multithread mode.
/// </summary>
MultiThread = 0x480,
/// <summary>
/// Specifies mode with end marker.
/// </summary>
EndMarker = 0x490
}
#endregion
#region ISetCoderProperties
private abstract class ISetCoderProperties
{
public abstract void SetCoderProperties(CoderPropID[] propIDs, object[] properties);
}
#endregion
#region IWriteCoderProperties
private abstract class IWriteCoderProperties
{
public abstract void WriteCoderProperties(System.IO.Stream outStream);
}
#endregion
#region ISetDecoderProperties
private abstract class ISetDecoderProperties
{
public abstract void SetDecoderProperties(byte[] properties);
}
#endregion
#endregion
}
}
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