--- a/misc/libphysfs/lzma/CS/7zip/Compress/LZMA/LzmaEncoder.cs Thu Oct 11 23:43:31 2018 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1480 +0,0 @@
-// LzmaEncoder.cs
-
-using System;
-
-namespace SevenZip.Compression.LZMA
-{
- using RangeCoder;
-
- public class Encoder : ICoder, ISetCoderProperties, IWriteCoderProperties
- {
- enum EMatchFinderType
- {
- BT2,
- BT4,
- };
-
- const UInt32 kIfinityPrice = 0xFFFFFFF;
-
- static Byte[] g_FastPos = new Byte[1 << 11];
-
- static Encoder()
- {
- 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);
- }
-
- Base.State _state = new Base.State();
- Byte _previousByte;
- UInt32[] _repDistances = new UInt32[Base.kNumRepDistances];
-
- void BaseInit()
- {
- _state.Init();
- _previousByte = 0;
- for (UInt32 i = 0; i < Base.kNumRepDistances; i++)
- _repDistances[i] = 0;
- }
-
- const int kDefaultDictionaryLogSize = 22;
- const UInt32 kNumFastBytesDefault = 0x20;
-
- class LiteralEncoder
- {
- public struct Encoder2
- {
- BitEncoder[] m_Encoders;
-
- public void Create() { m_Encoders = new BitEncoder[0x300]; }
-
- public void Init() { for (int i = 0; i < 0x300; i++) m_Encoders[i].Init(); }
-
- public void Encode(RangeCoder.Encoder 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(RangeCoder.Encoder 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
- {
- RangeCoder.BitEncoder _choice = new RangeCoder.BitEncoder();
- RangeCoder.BitEncoder _choice2 = new RangeCoder.BitEncoder();
- RangeCoder.BitTreeEncoder[] _lowCoder = new RangeCoder.BitTreeEncoder[Base.kNumPosStatesEncodingMax];
- RangeCoder.BitTreeEncoder[] _midCoder = new RangeCoder.BitTreeEncoder[Base.kNumPosStatesEncodingMax];
- RangeCoder.BitTreeEncoder _highCoder = new RangeCoder.BitTreeEncoder(Base.kNumHighLenBits);
-
- public LenEncoder()
- {
- for (UInt32 posState = 0; posState < Base.kNumPosStatesEncodingMax; posState++)
- {
- _lowCoder[posState] = new RangeCoder.BitTreeEncoder(Base.kNumLowLenBits);
- _midCoder[posState] = new RangeCoder.BitTreeEncoder(Base.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(RangeCoder.Encoder rangeEncoder, UInt32 symbol, UInt32 posState)
- {
- if (symbol < Base.kNumLowLenSymbols)
- {
- _choice.Encode(rangeEncoder, 0);
- _lowCoder[posState].Encode(rangeEncoder, symbol);
- }
- else
- {
- symbol -= Base.kNumLowLenSymbols;
- _choice.Encode(rangeEncoder, 1);
- if (symbol < Base.kNumMidLenSymbols)
- {
- _choice2.Encode(rangeEncoder, 0);
- _midCoder[posState].Encode(rangeEncoder, symbol);
- }
- else
- {
- _choice2.Encode(rangeEncoder, 1);
- _highCoder.Encode(rangeEncoder, symbol - Base.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 < Base.kNumLowLenSymbols; i++)
- {
- if (i >= numSymbols)
- return;
- prices[st + i] = a0 + _lowCoder[posState].GetPrice(i);
- }
- for (; i < Base.kNumLowLenSymbols + Base.kNumMidLenSymbols; i++)
- {
- if (i >= numSymbols)
- return;
- prices[st + i] = b0 + _midCoder[posState].GetPrice(i - Base.kNumLowLenSymbols);
- }
- for (; i < numSymbols; i++)
- prices[st + i] = b1 + _highCoder.GetPrice(i - Base.kNumLowLenSymbols - Base.kNumMidLenSymbols);
- }
- };
-
- const UInt32 kNumLenSpecSymbols = Base.kNumLowLenSymbols + Base.kNumMidLenSymbols;
-
- class LenPriceTableEncoder : LenEncoder
- {
- UInt32[] _prices = new UInt32[Base.kNumLenSymbols << Base.kNumPosStatesBitsEncodingMax];
- UInt32 _tableSize;
- UInt32[] _counters = new UInt32[Base.kNumPosStatesEncodingMax];
-
- public void SetTableSize(UInt32 tableSize) { _tableSize = tableSize; }
-
- public UInt32 GetPrice(UInt32 symbol, UInt32 posState)
- {
- return _prices[posState * Base.kNumLenSymbols + symbol];
- }
-
- void UpdateTable(UInt32 posState)
- {
- SetPrices(posState, _tableSize, _prices, posState * Base.kNumLenSymbols);
- _counters[posState] = _tableSize;
- }
-
- public void UpdateTables(UInt32 numPosStates)
- {
- for (UInt32 posState = 0; posState < numPosStates; posState++)
- UpdateTable(posState);
- }
-
- public new void Encode(RangeCoder.Encoder rangeEncoder, UInt32 symbol, UInt32 posState)
- {
- base.Encode(rangeEncoder, symbol, posState);
- if (--_counters[posState] == 0)
- UpdateTable(posState);
- }
- }
-
- const UInt32 kNumOpts = 1 << 12;
- class Optimal
- {
- public Base.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];
- LZ.IMatchFinder _matchFinder = null;
- RangeCoder.Encoder _rangeEncoder = new RangeCoder.Encoder();
-
- RangeCoder.BitEncoder[] _isMatch = new RangeCoder.BitEncoder[Base.kNumStates << Base.kNumPosStatesBitsMax];
- RangeCoder.BitEncoder[] _isRep = new RangeCoder.BitEncoder[Base.kNumStates];
- RangeCoder.BitEncoder[] _isRepG0 = new RangeCoder.BitEncoder[Base.kNumStates];
- RangeCoder.BitEncoder[] _isRepG1 = new RangeCoder.BitEncoder[Base.kNumStates];
- RangeCoder.BitEncoder[] _isRepG2 = new RangeCoder.BitEncoder[Base.kNumStates];
- RangeCoder.BitEncoder[] _isRep0Long = new RangeCoder.BitEncoder[Base.kNumStates << Base.kNumPosStatesBitsMax];
-
- RangeCoder.BitTreeEncoder[] _posSlotEncoder = new RangeCoder.BitTreeEncoder[Base.kNumLenToPosStates];
-
- RangeCoder.BitEncoder[] _posEncoders = new RangeCoder.BitEncoder[Base.kNumFullDistances - Base.kEndPosModelIndex];
- RangeCoder.BitTreeEncoder _posAlignEncoder = new RangeCoder.BitTreeEncoder(Base.kNumAlignBits);
-
- LenPriceTableEncoder _lenEncoder = new LenPriceTableEncoder();
- LenPriceTableEncoder _repMatchLenEncoder = new LenPriceTableEncoder();
-
- LiteralEncoder _literalEncoder = new LiteralEncoder();
-
- UInt32[] _matchDistances = new UInt32[Base.kMatchMaxLen * 2 + 2];
-
- UInt32 _numFastBytes = kNumFastBytesDefault;
- UInt32 _longestMatchLength;
- UInt32 _numDistancePairs;
-
- UInt32 _additionalOffset;
-
- UInt32 _optimumEndIndex;
- UInt32 _optimumCurrentIndex;
-
- bool _longestMatchWasFound;
-
- UInt32[] _posSlotPrices = new UInt32[1 << (Base.kNumPosSlotBits + Base.kNumLenToPosStatesBits)];
- UInt32[] _distancesPrices = new UInt32[Base.kNumFullDistances << Base.kNumLenToPosStatesBits];
- UInt32[] _alignPrices = new UInt32[Base.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)
- {
- LZ.BinTree bt = new LZ.BinTree();
- 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, Base.kMatchMaxLen + 1);
- _dictionarySizePrev = _dictionarySize;
- _numFastBytesPrev = _numFastBytes;
- }
-
- public Encoder()
- {
- for (int i = 0; i < kNumOpts; i++)
- _optimum[i] = new Optimal();
- for (int i = 0; i < Base.kNumLenToPosStates; i++)
- _posSlotEncoder[i] = new RangeCoder.BitTreeEncoder(Base.kNumPosSlotBits);
- }
-
- void SetWriteEndMarkerMode(bool writeEndMarker)
- {
- _writeEndMark = writeEndMarker;
- }
-
- void Init()
- {
- BaseInit();
- _rangeEncoder.Init();
-
- uint i;
- for (i = 0; i < Base.kNumStates; i++)
- {
- for (uint j = 0; j <= _posStateMask; j++)
- {
- uint complexState = (i << Base.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 < Base.kNumLenToPosStates; i++)
- _posSlotEncoder[i].Init();
- for (i = 0; i < Base.kNumFullDistances - Base.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],
- Base.kMatchMaxLen - lenRes);
- }
- _additionalOffset++;
- }
-
-
- void MovePos(UInt32 num)
- {
- if (num > 0)
- {
- _matchFinder.Skip(num);
- _additionalOffset += num;
- }
- }
-
- UInt32 GetRepLen1Price(Base.State state, UInt32 posState)
- {
- return _isRepG0[state.Index].GetPrice0() +
- _isRep0Long[(state.Index << Base.kNumPosStatesBitsMax) + posState].GetPrice0();
- }
-
- UInt32 GetPureRepPrice(UInt32 repIndex, Base.State state, UInt32 posState)
- {
- UInt32 price;
- if (repIndex == 0)
- {
- price = _isRepG0[state.Index].GetPrice0();
- price += _isRep0Long[(state.Index << Base.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, Base.State state, UInt32 posState)
- {
- UInt32 price = _repMatchLenEncoder.GetPrice(len - Base.kMatchMinLen, posState);
- return price + GetPureRepPrice(repIndex, state, posState);
- }
-
- UInt32 GetPosLenPrice(UInt32 pos, UInt32 len, UInt32 posState)
- {
- UInt32 price;
- UInt32 lenToPosState = Base.GetLenToPosState(len);
- if (pos < Base.kNumFullDistances)
- price = _distancesPrices[(lenToPosState * Base.kNumFullDistances) + pos];
- else
- price = _posSlotPrices[(lenToPosState << Base.kNumPosSlotBits) + GetPosSlot2(pos)] +
- _alignPrices[pos & Base.kAlignMask];
- return price + _lenEncoder.GetPrice(len - Base.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[Base.kNumRepDistances];
- UInt32[] repLens = new UInt32[Base.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 > Base.kMatchMaxLen)
- numAvailableBytes = Base.kMatchMaxLen;
-
- UInt32 repMaxIndex = 0;
- UInt32 i;
- for (i = 0; i < Base.kNumRepDistances; i++)
- {
- reps[i] = _repDistances[i];
- repLens[i] = _matchFinder.GetMatchLen(0 - 1, reps[i], Base.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] + Base.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 << Base.kNumPosStatesBitsMax) + posState].GetPrice0() +
- _literalEncoder.GetSubCoder(position, _previousByte).GetPrice(!_state.IsCharState(), matchByte, currentByte);
- _optimum[1].MakeAsChar();
-
- UInt32 matchPrice = _isMatch[(_state.Index << Base.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 < Base.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 + Base.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;
- Base.State state;
- if (_optimum[cur].Prev1IsChar)
- {
- posPrev--;
- if (_optimum[cur].Prev2)
- {
- state = _optimum[_optimum[cur].PosPrev2].State;
- if (_optimum[cur].BackPrev2 < Base.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 < Base.kNumRepDistances)
- state.UpdateRep();
- else
- state.UpdateMatch();
- }
- Optimal opt = _optimum[posPrev];
- if (pos < Base.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 - Base.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 << Base.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 << Base.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)
- {
- Base.State state2 = state;
- state2.UpdateChar();
- UInt32 posStateNext = (position + 1) & _posStateMask;
- UInt32 nextRepMatchPrice = curAnd1Price +
- _isMatch[(state2.Index << Base.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 < Base.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)
- {
- Base.State state2 = state;
- state2.UpdateRep();
- UInt32 posStateNext = (position + lenTest) & _posStateMask;
- UInt32 curAndLenCharPrice =
- repMatchPrice + GetRepPrice(repIndex, lenTest, state, posState) +
- _isMatch[(state2.Index << Base.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 << Base.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 + Base.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)
- {
- Base.State state2 = state;
- state2.UpdateMatch();
- UInt32 posStateNext = (position + lenTest) & _posStateMask;
- UInt32 curAndLenCharPrice = curAndLenPrice +
- _isMatch[(state2.Index << Base.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 << Base.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 + Base.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 << Base.kNumPosStatesBitsMax) + posState].Encode(_rangeEncoder, 1);
- _isRep[_state.Index].Encode(_rangeEncoder, 0);
- _state.UpdateMatch();
- UInt32 len = Base.kMatchMinLen;
- _lenEncoder.Encode(_rangeEncoder, len - Base.kMatchMinLen, posState);
- UInt32 posSlot = (1 << Base.kNumPosSlotBits) - 1;
- UInt32 lenToPosState = Base.GetLenToPosState(len);
- _posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
- int footerBits = 30;
- UInt32 posReduced = (((UInt32)1) << footerBits) - 1;
- _rangeEncoder.EncodeDirectBits(posReduced >> Base.kNumAlignBits, footerBits - Base.kNumAlignBits);
- _posAlignEncoder.ReverseEncode(_rangeEncoder, posReduced & Base.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 (_trainSize > 0)
- _matchFinder.Skip(_trainSize);
- }
-
- 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 << Base.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 << Base.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 < Base.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 - Base.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 - Base.kMatchMinLen, posState);
- pos -= Base.kNumRepDistances;
- UInt32 posSlot = GetPosSlot(pos);
- UInt32 lenToPosState = Base.GetLenToPosState(len);
- _posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
-
- if (posSlot >= Base.kStartPosModelIndex)
- {
- int footerBits = (int)((posSlot >> 1) - 1);
- UInt32 baseVal = ((2 | (posSlot & 1)) << footerBits);
- UInt32 posReduced = pos - baseVal;
-
- if (posSlot < Base.kEndPosModelIndex)
- RangeCoder.BitTreeEncoder.ReverseEncode(_posEncoders,
- baseVal - posSlot - 1, _rangeEncoder, footerBits, posReduced);
- else
- {
- _rangeEncoder.EncodeDirectBits(posReduced >> Base.kNumAlignBits, footerBits - Base.kNumAlignBits);
- _posAlignEncoder.ReverseEncode(_rangeEncoder, posReduced & Base.kAlignMask);
- _alignPriceCount++;
- }
- }
- UInt32 distance = pos;
- for (UInt32 i = Base.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 >= Base.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 - Base.kMatchMinLen);
- _lenEncoder.UpdateTables((UInt32)1 << _posStateBits);
- _repMatchLenEncoder.SetTableSize(_numFastBytes + 1 - Base.kMatchMinLen);
- _repMatchLenEncoder.UpdateTables((UInt32)1 << _posStateBits);
-
- nowPos64 = 0;
- }
-
-
- public 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[Base.kNumFullDistances];
- UInt32 _matchPriceCount;
-
- void FillDistancesPrices()
- {
- for (UInt32 i = Base.kStartPosModelIndex; i < Base.kNumFullDistances; i++)
- {
- UInt32 posSlot = GetPosSlot(i);
- int footerBits = (int)((posSlot >> 1) - 1);
- UInt32 baseVal = ((2 | (posSlot & 1)) << footerBits);
- tempPrices[i] = BitTreeEncoder.ReverseGetPrice(_posEncoders,
- baseVal - posSlot - 1, footerBits, i - baseVal);
- }
-
- for (UInt32 lenToPosState = 0; lenToPosState < Base.kNumLenToPosStates; lenToPosState++)
- {
- UInt32 posSlot;
- RangeCoder.BitTreeEncoder encoder = _posSlotEncoder[lenToPosState];
-
- UInt32 st = (lenToPosState << Base.kNumPosSlotBits);
- for (posSlot = 0; posSlot < _distTableSize; posSlot++)
- _posSlotPrices[st + posSlot] = encoder.GetPrice(posSlot);
- for (posSlot = Base.kEndPosModelIndex; posSlot < _distTableSize; posSlot++)
- _posSlotPrices[st + posSlot] += ((((posSlot >> 1) - 1) - Base.kNumAlignBits) << RangeCoder.BitEncoder.kNumBitPriceShiftBits);
-
- UInt32 st2 = lenToPosState * Base.kNumFullDistances;
- UInt32 i;
- for (i = 0; i < Base.kStartPosModelIndex; i++)
- _distancesPrices[st2 + i] = _posSlotPrices[st + i];
- for (; i < Base.kNumFullDistances; i++)
- _distancesPrices[st2 + i] = _posSlotPrices[st + GetPosSlot(i)] + tempPrices[i];
- }
- _matchPriceCount = 0;
- }
-
- void FillAlignPrices()
- {
- for (UInt32 i = 0; i < Base.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 InvalidParamException();
- Int32 numFastBytes = (Int32)prop;
- if (numFastBytes < 5 || numFastBytes > Base.kMatchMaxLen)
- throw new InvalidParamException();
- _numFastBytes = (UInt32)numFastBytes;
- break;
- }
- case CoderPropID.Algorithm:
- {
- /*
- if (!(prop is Int32))
- throw new InvalidParamException();
- Int32 maximize = (Int32)prop;
- _fastMode = (maximize == 0);
- _maxMode = (maximize >= 2);
- */
- break;
- }
- case CoderPropID.MatchFinder:
- {
- if (!(prop is String))
- throw new InvalidParamException();
- EMatchFinderType matchFinderIndexPrev = _matchFinderType;
- int m = FindMatchFinder(((string)prop).ToUpper());
- if (m < 0)
- throw new InvalidParamException();
- _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 InvalidParamException(); ;
- Int32 dictionarySize = (Int32)prop;
- if (dictionarySize < (UInt32)(1 << Base.kDicLogSizeMin) ||
- dictionarySize > (UInt32)(1 << kDicLogSizeMaxCompress))
- throw new InvalidParamException();
- _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 InvalidParamException();
- Int32 v = (Int32)prop;
- if (v < 0 || v > (UInt32)Base.kNumPosStatesBitsEncodingMax)
- throw new InvalidParamException();
- _posStateBits = (int)v;
- _posStateMask = (((UInt32)1) << (int)_posStateBits) - 1;
- break;
- }
- case CoderPropID.LitPosBits:
- {
- if (!(prop is Int32))
- throw new InvalidParamException();
- Int32 v = (Int32)prop;
- if (v < 0 || v > (UInt32)Base.kNumLitPosStatesBitsEncodingMax)
- throw new InvalidParamException();
- _numLiteralPosStateBits = (int)v;
- break;
- }
- case CoderPropID.LitContextBits:
- {
- if (!(prop is Int32))
- throw new InvalidParamException();
- Int32 v = (Int32)prop;
- if (v < 0 || v > (UInt32)Base.kNumLitContextBitsMax)
- throw new InvalidParamException(); ;
- _numLiteralContextBits = (int)v;
- break;
- }
- case CoderPropID.EndMarker:
- {
- if (!(prop is Boolean))
- throw new InvalidParamException();
- SetWriteEndMarkerMode((Boolean)prop);
- break;
- }
- default:
- throw new InvalidParamException();
- }
- }
- }
-
- uint _trainSize = 0;
- public void SetTrainSize(uint trainSize)
- {
- _trainSize = trainSize;
- }
-
- }
-}