forked from KolibriOS/kolibrios
1079 lines
32 KiB
C
1079 lines
32 KiB
C
#include "LZMAEncoder.h"
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#include "MatchFinder.h"
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const byte kLiteralNextStates[kNumStates] = {0,0,0,0,1,2,3,4,5,6,4,5};
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const byte kMatchNextStates[kNumStates] = {7,7,7,7,7,7,7,10,10,10,10,10};
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const byte kRepNextStates[kNumStates] = {8,8,8,8,8,8,8,11,11,11,11,11};
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const byte kShortRepNextStates[kNumStates] = {9,9,9,9,9,9,9,11,11,11,11,11};
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static CState _state;
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static byte _previousByte;
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static unsigned _repDistances[kNumRepDistances];
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static COptimal _optimum[kNumOpts];
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static CMyBitEncoder _isMatch[kNumStates][kNumPosStatesEncodingMax];
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static CMyBitEncoder _isRep[kNumStates];
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static CMyBitEncoder _isRepG0[kNumStates];
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static CMyBitEncoder _isRepG1[kNumStates];
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static CMyBitEncoder _isRepG2[kNumStates];
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static CMyBitEncoder _isRep0Long[kNumStates][kNumPosStatesEncodingMax];
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static NRangeCoder_CBitTreeEncoder _posSlotEncoder[kNumLenToPosStates];
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static CMyBitEncoder _posEncoders[kNumFullDistances - kEndPosModelIndex];
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static NRangeCoder_CBitTreeEncoder _posAlignEncoder;
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static NLength_CPriceTableEncoder _lenEncoder;
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static NLength_CPriceTableEncoder _repMatchLenEncoder;
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static CLiteralEncoder _literalEncoder;
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static unsigned _matchDistances[kMatchMaxLen+1];
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static unsigned _numFastBytes;
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static unsigned _longestMatchLength;
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static unsigned _additionalOffset;
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static unsigned _optimumEndIndex;
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static unsigned _optimumCurrentIndex;
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static bool _longestMatchWasFound;
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static unsigned _posSlotPrices[kNumLenToPosStates][kDistTableSizeMax];
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static unsigned _distancesPrices[kNumLenToPosStates][kNumFullDistances];
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static unsigned _alignPrices[kAlignTableSize];
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static unsigned _alignPriceCount;
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static unsigned _distTableSize;
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static unsigned _posStateBits;
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static unsigned _posStateMask;
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static unsigned _numLiteralPosStateBits;
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static unsigned _numLiteralContextBits;
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static unsigned _dictionarySize;
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static uint64 lastPosSlotFillingPos;
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static uint64 nowPos64;
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static bool _finished;
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static bool _writeEndMark;
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static byte g_FastPos[1024];
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// must be called before work
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static void FastPosInit(void)
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{
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int c = 2;
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int slotFast;
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unsigned j,k;
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g_FastPos[0] = 0;
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g_FastPos[1] = 1;
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for (slotFast = 2; slotFast < 20; slotFast++)
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{
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k = (1 << ((slotFast >> 1) - 1));
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for (j=0;j<k;j++) g_FastPos[c++] = slotFast;
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}
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}
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static unsigned GetPosSlot(unsigned pos)
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{
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if (pos < (1<<10))
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return g_FastPos[pos];
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if (pos < (1<<19))
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return g_FastPos[pos>>9]+18;
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return g_FastPos[pos>>18]+36;
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}
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static unsigned GetPosSlot2(unsigned pos)
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{
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if (pos < (1<<16))
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return g_FastPos[pos>>6]+12;
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if (pos < (1<<25))
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return g_FastPos[pos>>15]+30;
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return g_FastPos[pos>>24]+48;
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}
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unsigned pack_length;
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unsigned pack_pos;
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const byte* curin;
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byte* curout;
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static void NLength_CEncoder_Init(NLength_CEncoder*e, unsigned numPosStates)
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{
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unsigned posState;
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CMyBitEncoder_Init(e->_choice);
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CMyBitEncoder_Init(e->_choice2);
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for (posState=0;posState<numPosStates;posState++)
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{
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CBitTreeEncoder_Init(&e->_lowCoder[posState],kNumLowBits);
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CBitTreeEncoder_Init(&e->_midCoder[posState],kNumMidBits);
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}
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CBitTreeEncoder_Init(&e->_highCoder,kNumHighBits);
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}
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static void NLength_CEncoder_Encode(NLength_CEncoder*e, unsigned symbol, unsigned posState)
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{
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if (symbol < kNumLowSymbols)
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{
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CMyBitEncoder_Encode(&e->_choice,0);
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CBitTreeEncoder_Encode(&e->_lowCoder[posState],symbol);
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}
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else
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{
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CMyBitEncoder_Encode(&e->_choice,1);
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if (symbol < kNumLowSymbols + kNumMidSymbols)
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{
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CMyBitEncoder_Encode(&e->_choice2,0);
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CBitTreeEncoder_Encode(&e->_midCoder[posState],symbol-kNumLowSymbols);
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}
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else
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{
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CMyBitEncoder_Encode(&e->_choice2,1);
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CBitTreeEncoder_Encode(&e->_highCoder,symbol-kNumLowSymbols-kNumMidSymbols);
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}
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}
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}
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static unsigned NLength_CEncoder_GetPrice(NLength_CEncoder*e, unsigned symbol, unsigned posState)
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{
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unsigned price;
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if (symbol < kNumLowSymbols)
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return CMyBitEncoder_GetPrice0(&e->_choice) +
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CBitTreeEncoder_GetPrice(&e->_lowCoder[posState],symbol);
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price = CMyBitEncoder_GetPrice1(&e->_choice);
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if (symbol < kNumLowSymbols + kNumMidSymbols)
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{
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price += CMyBitEncoder_GetPrice0(&e->_choice2);
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price += CBitTreeEncoder_GetPrice(&e->_midCoder[posState],symbol-kNumLowSymbols);
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}
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else
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{
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price += CMyBitEncoder_GetPrice1(&e->_choice2);
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price += CBitTreeEncoder_GetPrice(&e->_highCoder,symbol-kNumLowSymbols-kNumMidSymbols);
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}
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return price;
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}
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static void CPriceTableEncoder_SetTableSize(NLength_CPriceTableEncoder*pte,unsigned tableSize)
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{pte->_tableSize = tableSize;}
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static unsigned CPriceTableEncoder_GetPrice(NLength_CPriceTableEncoder*pte,unsigned symbol,unsigned posState)
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{return pte->_prices[symbol][posState];}
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static void CPriceTableEncoder_UpdateTable(NLength_CPriceTableEncoder*pte,unsigned posState)
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{
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unsigned len;
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for (len=0;len<pte->_tableSize;len++)
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pte->_prices[len][posState] = NLength_CEncoder_GetPrice(&pte->base,len,posState);
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pte->_counters[posState] = pte->_tableSize;
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}
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static void CPriceTableEncoder_UpdateTables(NLength_CPriceTableEncoder*pte,unsigned numPosStates)
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{
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unsigned posState;
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for (posState=0;posState<numPosStates;posState++)
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CPriceTableEncoder_UpdateTable(pte,posState);
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}
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static void CPriceTableEncoder_Encode(NLength_CPriceTableEncoder*pte, unsigned symbol, unsigned posState)
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{
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NLength_CEncoder_Encode(&pte->base,symbol,posState);
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if (--pte->_counters[posState] == 0)
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CPriceTableEncoder_UpdateTable(pte,posState);
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}
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static void CBaseState_Init(void)
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{
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unsigned i;
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CState_Init(_state);
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_previousByte = 0;
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for (i=0;i<kNumRepDistances;i++)
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_repDistances[i] = 0;
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}
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static void CLiteralEncoder2_Init(CLiteralEncoder2 le)
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{
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int i;
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for (i=0;i<0x300;i++)
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CMyBitEncoder_Init(le[i]);
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}
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static void CLiteralEncoder2_Encode(CLiteralEncoder2 le, byte symbol)
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{
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unsigned context = 1;
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int i;
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unsigned bit;
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for (i=8;i--;)
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{
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bit = (symbol >> i) & 1;
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CMyBitEncoder_Encode(&le[context],bit);
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context = (context << 1) | bit;
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}
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}
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static void CLiteralEncoder2_EncodeMatched(CLiteralEncoder2 le, byte matchByte, byte symbol)
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{
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unsigned context = 1;
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int i;
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unsigned bit,matchBit;
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for (i=8;i--;)
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{
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bit = (symbol >> i) & 1;
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matchBit = (matchByte >> i) & 1;
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CMyBitEncoder_Encode(&le[0x100 + (matchBit<<8) + context],bit);
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context = (context << 1) | bit;
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if (matchBit != bit)
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{
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while (i--)
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{
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bit = (symbol >> i) & 1;
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CMyBitEncoder_Encode(&le[context],bit);
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context = (context << 1) | bit;
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}
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break;
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}
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}
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}
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static unsigned CLiteralEncoder2_GetPrice(CLiteralEncoder2 le, bool matchMode, byte matchByte, byte symbol)
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{
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unsigned price = 0;
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unsigned context = 1;
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unsigned bit,matchBit;
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int i = 8;
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if (matchMode)
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{
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do
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{
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i--;
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matchBit = (matchByte >> i) & 1;
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bit = (symbol >> i) & 1;
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price += CMyBitEncoder_GetPrice(&le[0x100 + (matchBit<<8) + context],bit);
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context = (context << 1) | bit;
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if (matchBit != bit)
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break;
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} while (i);
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}
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while (i--)
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{
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bit = (symbol >> i) & 1;
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price += CMyBitEncoder_GetPrice(&le[context],bit);
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context = (context << 1) | bit;
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}
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return price;
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}
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static void WriteEndMarker(unsigned posState)
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{
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unsigned posSlot;
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if (!_writeEndMark)
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return;
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CMyBitEncoder_Encode(&_isMatch[_state][posState],1);
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CMyBitEncoder_Encode(&_isRep[_state],0);
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CState_UpdateMatch(_state);
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CPriceTableEncoder_Encode(&_lenEncoder,0,posState);
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posSlot = (1<<kNumPosSlotBits) - 1;
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CBitTreeEncoder_Encode(&_posSlotEncoder[GetLenToPosState(kMatchMinLen)],posSlot);
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RangeEncoder_EncodeDirectBits(((1<<30)-1)>>kNumAlignBits,30-kNumAlignBits);
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CBitTreeEncoder_ReverseEncode(&_posAlignEncoder,((1<<30)-1) & kAlignMask);
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}
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static void CEncoder_Flush(void)
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{
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WriteEndMarker((unsigned)nowPos64 & _posStateMask);
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RangeEncoder_FlushData();
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}
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static void CLiteralEncoder_Create(CLiteralEncoder*le, byte** memory, int numPosBits, int numPrevBits)
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{
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unsigned numStates;
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le->_coders = (CLiteralEncoder2*)*memory;
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numStates = 1 << (numPosBits+numPrevBits);
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*memory = (byte*)(le->_coders + numStates);
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le->_numPosBits = numPosBits;
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le->_posMask = (1<<numPosBits) - 1;
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le->_numPrevBits = numPrevBits;
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}
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static void CLiteralEncoder_Init(CLiteralEncoder*le)
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{
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unsigned numStates,i;
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numStates = 1 << (le->_numPosBits + le->_numPrevBits);
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for (i=0;i<numStates;i++)
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CLiteralEncoder2_Init(le->_coders[i]);
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}
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static unsigned CLiteralEncoder_GetState(CLiteralEncoder*le,unsigned pos,byte prevByte)
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{return ((pos&le->_posMask)<<le->_numPrevBits)+(prevByte>>(8-le->_numPrevBits));}
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static CLiteralEncoder2* CLiteralEncoder_GetSubCoder(CLiteralEncoder*le,unsigned pos,byte prevByte)
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{return &le->_coders[CLiteralEncoder_GetState(le,pos,prevByte)];}
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static unsigned CLiteralEncoder_GetPrice(CLiteralEncoder*le,unsigned pos,byte prevByte,
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bool matchMode, byte matchByte, byte symbol)
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{
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return CLiteralEncoder2_GetPrice(le->_coders[CLiteralEncoder_GetState(le,pos,prevByte)],
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matchMode, matchByte, symbol);
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}
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static void CEncoder_Create(void*workmem)
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{
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byte* workpos = (byte*)workmem;
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/* align on dword boundary */
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unsigned a;
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a = (unsigned)workpos & 3;
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if (a) workpos += 4-a;
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/* sizeof(CLiteralEncoder2) * (1<<(numPosBits+numPrevBits)) for literal encoders */
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/* = 0xC00 * 8 = 0x6000 with current settings */
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CLiteralEncoder_Create(&_literalEncoder,&workpos,_numLiteralPosStateBits,_numLiteralContextBits);
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/* (dictsize+0x1223)*1.5+256 for LZ input window */
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/* (0x140400 + (dictsize+1)*2) * 4 for match finder hash */
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MatchFinder_Create(_dictionarySize,kNumOpts,_numFastBytes,
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kMatchMaxLen*2+1-_numFastBytes,&workpos);
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/* total 0x508C3C + dictsize*9.5 */
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/* plus max 6 bytes for alignment */
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}
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static void CEncoder_Init(void)
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{
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int i;
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unsigned j;
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CBaseState_Init();
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RangeEncoder_Init();
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for (i=0;i<kNumStates;i++)
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{
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for (j=0;j<=_posStateMask;j++)
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{
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CMyBitEncoder_Init(_isMatch[i][j]);
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CMyBitEncoder_Init(_isRep0Long[i][j]);
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}
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CMyBitEncoder_Init(_isRep[i]);
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CMyBitEncoder_Init(_isRepG0[i]);
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CMyBitEncoder_Init(_isRepG1[i]);
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CMyBitEncoder_Init(_isRepG2[i]);
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}
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CLiteralEncoder_Init(&_literalEncoder);
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for (i=0;i<kNumLenToPosStates;i++)
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CBitTreeEncoder_Init(_posSlotEncoder+i,kNumPosSlotBits);
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for (i=0;i<kNumFullDistances-kEndPosModelIndex;i++)
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CMyBitEncoder_Init(_posEncoders[i]);
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CPriceTableEncoder_Init(_lenEncoder, 1<<_posStateBits);
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CPriceTableEncoder_Init(_repMatchLenEncoder,1<<_posStateBits);
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CBitTreeEncoder_Init(&_posAlignEncoder,kNumAlignBits);
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_longestMatchWasFound = false;
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_optimumEndIndex = 0;
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_optimumCurrentIndex = 0;
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_additionalOffset = 0;
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}
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static void MovePos(unsigned num)
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{
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for (;num--;)
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{
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DummyLongestMatch();
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MatchFinder_MovePos();
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_additionalOffset++;
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}
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}
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static unsigned Backward(unsigned* backRes, unsigned cur)
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{
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unsigned posMem,backMem;
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unsigned posPrev,backCur;
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_optimumEndIndex = cur;
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posMem = _optimum[cur].PosPrev;
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backMem = _optimum[cur].BackPrev;
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do
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{
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if (_optimum[cur].Prev1IsChar)
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{
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COptimal_MakeAsChar(&_optimum[posMem]);
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_optimum[posMem].PosPrev = posMem-1;
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if (_optimum[cur].Prev2)
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{
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_optimum[posMem-1].Prev1IsChar = false;
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_optimum[posMem-1].PosPrev = _optimum[cur].PosPrev2;
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_optimum[posMem-1].BackPrev = _optimum[cur].BackPrev2;
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}
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}
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posPrev = posMem;
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backCur = backMem;
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backMem = _optimum[posPrev].BackPrev;
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posMem = _optimum[posPrev].PosPrev;
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_optimum[posPrev].BackPrev = backCur;
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_optimum[posPrev].PosPrev = cur;
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cur = posPrev;
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} while (cur);
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*backRes = _optimum[0].BackPrev;
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_optimumCurrentIndex = _optimum[0].PosPrev;
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return _optimumCurrentIndex;
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}
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static unsigned ReadMatchDistances(void)
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{
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unsigned res;
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res = GetLongestMatch(_matchDistances);
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if (res == _numFastBytes)
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res += GetMatchLen(res,_matchDistances[res],kMatchMaxLen-res);
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_additionalOffset++;
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MatchFinder_MovePos();
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return res;
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}
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static void FillPosSlotPrices(void)
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{
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unsigned lenToPosState,posSlot;
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for (lenToPosState=0;lenToPosState<kNumLenToPosStates;lenToPosState++)
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{
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for (posSlot=0;posSlot<kEndPosModelIndex && posSlot<_distTableSize;posSlot++)
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_posSlotPrices[lenToPosState][posSlot] = CBitTreeEncoder_GetPrice(&_posSlotEncoder[lenToPosState],posSlot);
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for (;posSlot<_distTableSize;posSlot++)
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_posSlotPrices[lenToPosState][posSlot] = CBitTreeEncoder_GetPrice(&_posSlotEncoder[lenToPosState],posSlot) +
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(((posSlot>>1)-1-kNumAlignBits)<<kNumBitPriceShiftBits);
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}
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}
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static void FillDistancesPrices(void)
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{
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unsigned lenToPosState,i;
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unsigned posSlot,footerBits,base;
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for (lenToPosState=0;lenToPosState<kNumLenToPosStates;lenToPosState++)
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{
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for (i=0;i<kStartPosModelIndex;i++)
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_distancesPrices[lenToPosState][i] = _posSlotPrices[lenToPosState][i];
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for (;i<kNumFullDistances;i++)
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{
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posSlot = GetPosSlot(i);
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footerBits = ((posSlot>>1)-1);
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base = (2|(posSlot&1))<<footerBits;
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_distancesPrices[lenToPosState][i] = _posSlotPrices[lenToPosState][posSlot] +
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ReverseBitTreeGetPrice(_posEncoders+base-posSlot-1,footerBits,i-base);
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}
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}
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}
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static void FillAlignPrices(void)
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{
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unsigned i;
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for (i=0;i<kAlignTableSize;i++)
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_alignPrices[i] = CBitTreeEncoder_ReverseGetPrice(&_posAlignEncoder,i);
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_alignPriceCount = kAlignTableSize;
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}
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static unsigned GetRepLen1Price(CState state, unsigned posState)
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{
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return CMyBitEncoder_GetPrice0(&_isRepG0[state]) +
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CMyBitEncoder_GetPrice0(&_isRep0Long[state][posState]);
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}
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static unsigned GetRepPrice(unsigned repIndex, unsigned len, CState state, unsigned posState)
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{
|
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unsigned price;
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price = CPriceTableEncoder_GetPrice(&_repMatchLenEncoder,len-kMatchMinLen,posState);
|
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if (!repIndex)
|
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{
|
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price += CMyBitEncoder_GetPrice0(&_isRepG0[state]);
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price += CMyBitEncoder_GetPrice1(&_isRep0Long[state][posState]);
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}
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else
|
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{
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price += CMyBitEncoder_GetPrice1(&_isRepG0[state]);
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if (repIndex == 1)
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price += CMyBitEncoder_GetPrice0(&_isRepG1[state]);
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else
|
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{
|
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price += CMyBitEncoder_GetPrice1(&_isRepG1[state]);
|
||
price += CMyBitEncoder_GetPrice(&_isRepG2[state],repIndex-2);
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}
|
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}
|
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return price;
|
||
}
|
||
static unsigned GetPosLenPrice(unsigned pos, unsigned len, unsigned posState)
|
||
{
|
||
unsigned price,lenToPosState;
|
||
if (len==2 && pos>=0x80)
|
||
return kIfinityPrice;
|
||
lenToPosState = GetLenToPosState(len);
|
||
if (pos < kNumFullDistances)
|
||
price = _distancesPrices[lenToPosState][pos];
|
||
else
|
||
price = _posSlotPrices[lenToPosState][GetPosSlot2(pos)] +
|
||
_alignPrices[pos & kAlignMask];
|
||
return price + CPriceTableEncoder_GetPrice(&_lenEncoder,len-kMatchMinLen,posState);
|
||
}
|
||
|
||
static void GetOptimum(unsigned position,unsigned*backRes,unsigned*lenRes)
|
||
{
|
||
int lenMain,lenEnd;
|
||
COptimal* opt,*prevOpt;
|
||
int reps[kNumRepDistances];
|
||
int repLens[kNumRepDistances];
|
||
int repIndex,repMaxIndex;
|
||
int i,len,repLen,lenTest,newLen,lenTestTemp,lenTest2;
|
||
int posState,posStateNext;
|
||
byte currentByte,matchByte;
|
||
unsigned matchPrice,repMatchPrice,shortRepPrice,normalMatchPrice,curAndLenPrice,curPrice,curAnd1Price,curAndLenCharPrice;
|
||
unsigned nextMatchPrice,nextRepMatchPrice;
|
||
int cur,posPrev,pos;
|
||
CState state,state2;
|
||
const byte* data;
|
||
bool nextIsChar;
|
||
int numAvailableBytesFull,numAvailableBytes;
|
||
int backOffset,offset;
|
||
int limit;
|
||
if (_optimumEndIndex != _optimumCurrentIndex)
|
||
{
|
||
opt = &_optimum[_optimumCurrentIndex];
|
||
*lenRes = opt->PosPrev - _optimumCurrentIndex;
|
||
*backRes = opt->BackPrev;
|
||
_optimumCurrentIndex = opt->PosPrev;
|
||
return;
|
||
}
|
||
_optimumCurrentIndex = _optimumEndIndex = 0;
|
||
if (!_longestMatchWasFound)
|
||
lenMain = ReadMatchDistances();
|
||
else
|
||
{
|
||
lenMain = _longestMatchLength;
|
||
_longestMatchWasFound = false;
|
||
}
|
||
for (i=0;i<kNumRepDistances;i++)
|
||
{
|
||
reps[i] = _repDistances[i];
|
||
repLens[i] = GetMatchLen(0-1,reps[i],kMatchMaxLen);
|
||
if (i==0 || repLens[i] > repLens[repMaxIndex])
|
||
repMaxIndex = i;
|
||
}
|
||
if (repLens[repMaxIndex] >= _numFastBytes)
|
||
{
|
||
*backRes = repMaxIndex;
|
||
*lenRes = repLens[repMaxIndex];
|
||
MovePos(*lenRes-1);
|
||
return;
|
||
}
|
||
if (lenMain >= _numFastBytes)
|
||
{
|
||
*backRes = _matchDistances[_numFastBytes]+kNumRepDistances;
|
||
*lenRes = lenMain;
|
||
MovePos(lenMain-1);
|
||
return;
|
||
}
|
||
currentByte = GetIndexByte(0-1);
|
||
_optimum[0].State = _state;
|
||
matchByte = GetIndexByte(0-_repDistances[0]-2);
|
||
posState = position & _posStateMask;
|
||
_optimum[1].Price = CMyBitEncoder_GetPrice0(&_isMatch[_state][posState]) +
|
||
CLiteralEncoder_GetPrice(&_literalEncoder,position,_previousByte,
|
||
(bool)!CState_IsCharState(_state),matchByte,currentByte);
|
||
COptimal_MakeAsChar(&_optimum[1]);
|
||
_optimum[1].PosPrev = 0;
|
||
for (i=0;i<kNumRepDistances;i++)
|
||
_optimum[0].Backs[i] = reps[i];
|
||
matchPrice = CMyBitEncoder_GetPrice1(&_isMatch[_state][posState]);
|
||
repMatchPrice = matchPrice + CMyBitEncoder_GetPrice1(&_isRep[_state]);
|
||
if (matchByte == currentByte)
|
||
{
|
||
shortRepPrice = repMatchPrice + GetRepLen1Price(_state,posState);
|
||
if (shortRepPrice < _optimum[1].Price)
|
||
{
|
||
_optimum[1].Price = shortRepPrice;
|
||
COptimal_MakeAsShortRep(&_optimum[1]);
|
||
}
|
||
}
|
||
if (lenMain < 2)
|
||
{
|
||
*backRes = _optimum[1].BackPrev;
|
||
*lenRes = 1;
|
||
return;
|
||
}
|
||
normalMatchPrice = matchPrice + CMyBitEncoder_GetPrice0(&_isRep[_state]);
|
||
if (lenMain <= repLens[repMaxIndex])
|
||
lenMain = 0;
|
||
for (len=2;len<=lenMain;len++)
|
||
{
|
||
_optimum[len].PosPrev = 0;
|
||
_optimum[len].BackPrev = _matchDistances[len] + kNumRepDistances;
|
||
_optimum[len].Price = normalMatchPrice + GetPosLenPrice(_matchDistances[len],len,posState);
|
||
_optimum[len].Prev1IsChar = false;
|
||
}
|
||
if (lenMain < repLens[repMaxIndex])
|
||
lenMain = repLens[repMaxIndex];
|
||
for (;len<=lenMain;len++)
|
||
_optimum[len].Price = kIfinityPrice;
|
||
for (i=0;i<kNumRepDistances;i++)
|
||
{
|
||
repLen = repLens[i];
|
||
for (lenTest=2;lenTest<=repLen;lenTest++)
|
||
{
|
||
curAndLenPrice = repMatchPrice + GetRepPrice(i,lenTest,_state,posState);
|
||
opt = &_optimum[lenTest];
|
||
if (curAndLenPrice < opt->Price)
|
||
{
|
||
opt->Price = curAndLenPrice;
|
||
opt->PosPrev = 0;
|
||
opt->BackPrev = i;
|
||
opt->Prev1IsChar = false;
|
||
}
|
||
}
|
||
}
|
||
cur=0;
|
||
lenEnd = lenMain;
|
||
while (1)
|
||
{
|
||
cur++;
|
||
if (cur==lenEnd)
|
||
{
|
||
*lenRes = Backward(backRes,cur);
|
||
return;
|
||
}
|
||
position++;
|
||
opt = &_optimum[cur];
|
||
posPrev = opt->PosPrev;
|
||
if (opt->Prev1IsChar)
|
||
{
|
||
posPrev--;
|
||
if (opt->Prev2)
|
||
{
|
||
state = _optimum[opt->PosPrev2].State;
|
||
if (opt->BackPrev2 < kNumRepDistances)
|
||
CState_UpdateRep(state);
|
||
else
|
||
CState_UpdateMatch(state);
|
||
}
|
||
else
|
||
state = _optimum[posPrev].State;
|
||
CState_UpdateChar(state);
|
||
}
|
||
else
|
||
state = _optimum[posPrev].State;
|
||
if (posPrev == cur-1)
|
||
{
|
||
if (COptimal_IsShortRep(opt))
|
||
CState_UpdateShortRep(state);
|
||
else
|
||
CState_UpdateChar(state);
|
||
}
|
||
else
|
||
{
|
||
if (opt->Prev1IsChar && opt->Prev2)
|
||
{
|
||
posPrev = opt->PosPrev2;
|
||
pos = opt->BackPrev2;
|
||
CState_UpdateRep(state);
|
||
}
|
||
else
|
||
{
|
||
pos = opt->BackPrev;
|
||
if (pos < kNumRepDistances)
|
||
CState_UpdateRep(state);
|
||
else
|
||
CState_UpdateMatch(state);
|
||
}
|
||
prevOpt = &_optimum[posPrev];
|
||
if (pos < kNumRepDistances)
|
||
{
|
||
reps[0] = prevOpt->Backs[pos];
|
||
for (i=1;i<=pos;i++)
|
||
reps[i] = prevOpt->Backs[i-1];
|
||
for (;i<kNumRepDistances;i++)
|
||
reps[i] = prevOpt->Backs[i];
|
||
}
|
||
else
|
||
{
|
||
reps[0] = pos-kNumRepDistances;
|
||
for (i=1;i<kNumRepDistances;i++)
|
||
reps[i] = prevOpt->Backs[i-1];
|
||
}
|
||
}
|
||
opt->State = state;
|
||
for (i=0;i<kNumRepDistances;i++)
|
||
opt->Backs[i] = reps[i];
|
||
newLen = ReadMatchDistances();
|
||
if (newLen >= _numFastBytes)
|
||
{
|
||
_longestMatchLength = newLen;
|
||
_longestMatchWasFound = true;
|
||
*lenRes = Backward(backRes,cur);
|
||
return;
|
||
}
|
||
curPrice = opt->Price;
|
||
data = GetPointerToCurrentPos()-1;
|
||
currentByte = *data;
|
||
matchByte = data[-1-reps[0]];
|
||
posState = position & _posStateMask;
|
||
curAnd1Price = curPrice + CMyBitEncoder_GetPrice0(&_isMatch[state][posState]) +
|
||
CLiteralEncoder_GetPrice(&_literalEncoder,position,data[-1],(bool)!CState_IsCharState(state),matchByte,currentByte);
|
||
opt = &_optimum[cur+1];
|
||
nextIsChar = false;
|
||
if (curAnd1Price < opt->Price)
|
||
{
|
||
opt->Price = curAnd1Price;
|
||
opt->PosPrev = cur;
|
||
COptimal_MakeAsChar(opt);
|
||
nextIsChar = true;
|
||
}
|
||
matchPrice = curPrice + CMyBitEncoder_GetPrice1(&_isMatch[state][posState]);
|
||
repMatchPrice = matchPrice + CMyBitEncoder_GetPrice1(&_isRep[state]);
|
||
if (matchByte == currentByte && !(opt->PosPrev<cur && !opt->BackPrev))
|
||
{
|
||
shortRepPrice = repMatchPrice + GetRepLen1Price(state,posState);
|
||
if (shortRepPrice <= opt->Price)
|
||
{
|
||
opt->Price = shortRepPrice;
|
||
opt->PosPrev = cur;
|
||
COptimal_MakeAsShortRep(opt);
|
||
}
|
||
}
|
||
numAvailableBytesFull = GetNumAvailableBytes()+1;
|
||
if (numAvailableBytesFull > kNumOpts-1-cur)
|
||
numAvailableBytesFull = kNumOpts-1-cur;
|
||
numAvailableBytes = numAvailableBytesFull;
|
||
if (numAvailableBytes < 2)
|
||
continue;
|
||
if (numAvailableBytes > _numFastBytes)
|
||
numAvailableBytes = _numFastBytes;
|
||
if (numAvailableBytes >= 3 && !nextIsChar)
|
||
{
|
||
// try Literal + rep0
|
||
int temp;
|
||
backOffset = reps[0]+1;
|
||
for (temp=1;temp<numAvailableBytes;temp++)
|
||
if (data[temp]!=data[temp-backOffset])
|
||
break;
|
||
lenTest = temp-1;
|
||
if (lenTest>=2)
|
||
{
|
||
int posStateNext;
|
||
unsigned nextRepMatchPrice;
|
||
state2 = state;
|
||
CState_UpdateChar(state2);
|
||
posStateNext = (position+1) & _posStateMask;
|
||
nextRepMatchPrice = curAnd1Price +
|
||
CMyBitEncoder_GetPrice1(&_isMatch[state2][posStateNext]) +
|
||
CMyBitEncoder_GetPrice1(&_isRep[state2]);
|
||
while (lenEnd < cur+1+lenTest)
|
||
_optimum[++lenEnd].Price = kIfinityPrice;
|
||
curAndLenPrice = nextRepMatchPrice + GetRepPrice(0,lenTest,state2,posStateNext);
|
||
opt = &_optimum[cur+1+lenTest];
|
||
if (curAndLenPrice < opt->Price)
|
||
{
|
||
opt->Price = curAndLenPrice;
|
||
opt->PosPrev = cur+1;
|
||
opt->BackPrev = 0;
|
||
opt->Prev1IsChar = true;
|
||
opt->Prev2 = false;
|
||
}
|
||
}
|
||
}
|
||
for (repIndex=0;repIndex<kNumRepDistances;repIndex++)
|
||
{
|
||
backOffset = reps[repIndex]+1;
|
||
if (data[0] != data[0-backOffset] ||
|
||
data[1] != data[1-backOffset])
|
||
continue;
|
||
for (lenTest=2;lenTest<numAvailableBytes;lenTest++)
|
||
if (data[lenTest]!=data[lenTest-backOffset])
|
||
break;
|
||
lenTestTemp = lenTest;
|
||
do
|
||
{
|
||
while (lenEnd < cur+lenTest)
|
||
_optimum[++lenEnd].Price = kIfinityPrice;
|
||
curAndLenPrice = repMatchPrice + GetRepPrice(repIndex,lenTest,state,posState);
|
||
opt = &_optimum[cur+lenTest];
|
||
if (curAndLenPrice < opt->Price)
|
||
{
|
||
opt->Price = curAndLenPrice;
|
||
opt->PosPrev = cur;
|
||
opt->BackPrev = repIndex;
|
||
opt->Prev1IsChar = false;
|
||
}
|
||
} while (--lenTest>=2);
|
||
lenTest = lenTestTemp;
|
||
lenTest2 = lenTest+1;
|
||
limit = lenTest2 + _numFastBytes;
|
||
if (limit > numAvailableBytesFull)
|
||
limit = numAvailableBytesFull;
|
||
for (;lenTest2<limit;lenTest2++)
|
||
if (data[lenTest2] != data[lenTest2-backOffset])
|
||
break;
|
||
lenTest2 -= lenTest+1;
|
||
if (lenTest2 >= 2)
|
||
{
|
||
unsigned nextMatchPrice,nextRepMatchPrice;
|
||
int offset;
|
||
state2 = state;
|
||
CState_UpdateRep(state2);
|
||
posStateNext = (position+lenTest)&_posStateMask;
|
||
curAndLenCharPrice = repMatchPrice + GetRepPrice(repIndex,lenTest,state,posState) +
|
||
CMyBitEncoder_GetPrice0(&_isMatch[state2][posStateNext]) +
|
||
CLiteralEncoder_GetPrice(&_literalEncoder,position+lenTest,data[lenTest-1],true,data[lenTest-backOffset],data[lenTest]);
|
||
CState_UpdateChar(state2);
|
||
posStateNext = (position+lenTest+1)&_posStateMask;
|
||
nextMatchPrice = curAndLenCharPrice + CMyBitEncoder_GetPrice1(&_isMatch[state2][posStateNext]);
|
||
nextRepMatchPrice = nextMatchPrice + CMyBitEncoder_GetPrice1(&_isRep[state2]);
|
||
offset = lenTest+1+lenTest2;
|
||
while (lenEnd<cur+offset)
|
||
_optimum[++lenEnd].Price = kIfinityPrice;
|
||
curAndLenPrice = nextRepMatchPrice + GetRepPrice(0,lenTest2,state2,posStateNext);
|
||
opt = &_optimum[cur+offset];
|
||
if (curAndLenPrice < opt->Price)
|
||
{
|
||
opt->Price = curAndLenPrice;
|
||
opt->PosPrev = cur+lenTest+1;
|
||
opt->BackPrev = 0;
|
||
opt->Prev1IsChar = true;
|
||
opt->Prev2 = true;
|
||
opt->PosPrev2 = cur;
|
||
opt->BackPrev2 = repIndex;
|
||
}
|
||
}
|
||
}
|
||
if (newLen > numAvailableBytes)
|
||
newLen = numAvailableBytes;
|
||
if (newLen >= 2)
|
||
{
|
||
if (newLen==2 && _matchDistances[2] >= 0x80)
|
||
continue;
|
||
normalMatchPrice = matchPrice + CMyBitEncoder_GetPrice0(&_isRep[state]);
|
||
while (lenEnd < cur+newLen)
|
||
_optimum[++lenEnd].Price = kIfinityPrice;
|
||
for (lenTest=newLen;lenTest>=2;lenTest--)
|
||
{
|
||
backOffset = _matchDistances[lenTest];
|
||
curAndLenPrice = normalMatchPrice + GetPosLenPrice(backOffset,lenTest,posState);
|
||
opt = &_optimum[cur+lenTest];
|
||
if (curAndLenPrice < opt->Price)
|
||
{
|
||
opt->Price = curAndLenPrice;
|
||
opt->PosPrev = cur;
|
||
opt->BackPrev = backOffset+kNumRepDistances;
|
||
opt->Prev1IsChar = false;
|
||
}
|
||
if (lenTest==newLen || backOffset!=_matchDistances[lenTest+1])
|
||
{
|
||
// Try Match + Literal + Rep0
|
||
backOffset++;
|
||
lenTest2 = lenTest+1;
|
||
limit = lenTest2+_numFastBytes;
|
||
if (limit > numAvailableBytesFull)
|
||
limit = numAvailableBytesFull;
|
||
for (;lenTest2<limit;lenTest2++)
|
||
if (data[lenTest2]!=data[lenTest2-backOffset])
|
||
break;
|
||
lenTest2 -= lenTest+1;
|
||
if (lenTest2 >= 2)
|
||
{
|
||
state2 = state;
|
||
CState_UpdateMatch(state2);
|
||
posStateNext = (position+lenTest)&_posStateMask;
|
||
curAndLenCharPrice = curAndLenPrice + CMyBitEncoder_GetPrice0(&_isMatch[state2][posStateNext]) +
|
||
CLiteralEncoder_GetPrice(&_literalEncoder,position+lenTest,data[lenTest-1],true,data[lenTest-backOffset],data[lenTest]);
|
||
CState_UpdateChar(state2);
|
||
posStateNext = (position+lenTest+1)&_posStateMask;
|
||
nextMatchPrice = curAndLenCharPrice + CMyBitEncoder_GetPrice1(&_isMatch[state2][posStateNext]);
|
||
nextRepMatchPrice = nextMatchPrice + CMyBitEncoder_GetPrice1(&_isRep[state2]);
|
||
offset = lenTest+1+lenTest2;
|
||
while (lenEnd<cur+offset)
|
||
_optimum[++lenEnd].Price = kIfinityPrice;
|
||
curAndLenPrice = nextRepMatchPrice + GetRepPrice(0,lenTest2,state2,posStateNext);
|
||
opt = &_optimum[cur+offset];
|
||
if (curAndLenPrice < opt->Price)
|
||
{
|
||
opt->Price = curAndLenPrice;
|
||
opt->PosPrev = cur+lenTest+1;
|
||
opt->BackPrev = 0;
|
||
opt->Prev1IsChar = true;
|
||
opt->Prev2 = true;
|
||
opt->PosPrev2 = cur;
|
||
opt->BackPrev2 = backOffset - 1 + kNumRepDistances;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
static bool CodeOneBlock(void)
|
||
{
|
||
unsigned posState;
|
||
byte curByte,matchByte;
|
||
unsigned pos,len,distance,i;
|
||
unsigned posSlot,lenToPosState;
|
||
CLiteralEncoder2* subCoder;
|
||
uint64 progressPosValuePrev;
|
||
|
||
if (_finished)
|
||
return false;
|
||
_finished = true;
|
||
progressPosValuePrev = nowPos64;
|
||
if (nowPos64 == 0)
|
||
{
|
||
if (GetNumAvailableBytes() == 0)
|
||
{
|
||
CEncoder_Flush();
|
||
return false;
|
||
}
|
||
ReadMatchDistances();
|
||
posState = (unsigned)nowPos64 & _posStateMask;
|
||
CMyBitEncoder_Encode(&_isMatch[_state][posState],0);
|
||
CState_UpdateChar(_state);
|
||
curByte = GetIndexByte(0 - _additionalOffset);
|
||
CLiteralEncoder2_Encode(
|
||
*CLiteralEncoder_GetSubCoder(&_literalEncoder,(unsigned)nowPos64,_previousByte),
|
||
curByte);
|
||
_previousByte = curByte;
|
||
_additionalOffset--;
|
||
nowPos64++;
|
||
}
|
||
if (GetNumAvailableBytes() == 0)
|
||
{
|
||
CEncoder_Flush();
|
||
return false;
|
||
}
|
||
for (;;)
|
||
{
|
||
posState = (unsigned)nowPos64 & _posStateMask;
|
||
GetOptimum((unsigned)nowPos64,&pos,&len);
|
||
if (len==1 && pos==0xFFFFFFFF)
|
||
{
|
||
CMyBitEncoder_Encode(&_isMatch[_state][posState],0);
|
||
curByte = GetIndexByte(0-_additionalOffset);
|
||
subCoder = CLiteralEncoder_GetSubCoder(&_literalEncoder,(unsigned)nowPos64,
|
||
_previousByte);
|
||
if (!CState_IsCharState(_state))
|
||
{
|
||
matchByte = GetIndexByte(0-_repDistances[0]-1-_additionalOffset);
|
||
CLiteralEncoder2_EncodeMatched(*subCoder,matchByte,curByte);
|
||
}
|
||
else
|
||
CLiteralEncoder2_Encode(*subCoder,curByte);
|
||
CState_UpdateChar(_state);
|
||
_previousByte = curByte;
|
||
}
|
||
else
|
||
{
|
||
CMyBitEncoder_Encode(&_isMatch[_state][posState],1);
|
||
if (pos < kNumRepDistances)
|
||
{
|
||
CMyBitEncoder_Encode(&_isRep[_state],1);
|
||
if (pos==0)
|
||
{
|
||
CMyBitEncoder_Encode(&_isRepG0[_state],0);
|
||
CMyBitEncoder_Encode(&_isRep0Long[_state][posState],
|
||
(len==1) ? 0 : 1);
|
||
}
|
||
else
|
||
{
|
||
CMyBitEncoder_Encode(&_isRepG0[_state],1);
|
||
if (pos==1)
|
||
CMyBitEncoder_Encode(&_isRepG1[_state],0);
|
||
else
|
||
{
|
||
CMyBitEncoder_Encode(&_isRepG1[_state],1);
|
||
CMyBitEncoder_Encode(&_isRepG2[_state],pos-2);
|
||
}
|
||
}
|
||
if (len==1)
|
||
CState_UpdateShortRep(_state);
|
||
else
|
||
{
|
||
CPriceTableEncoder_Encode(&_repMatchLenEncoder,len-kMatchMinLen,posState);
|
||
CState_UpdateRep(_state);
|
||
}
|
||
distance = _repDistances[pos];
|
||
if (pos)
|
||
{
|
||
for (i=pos;i;i--)
|
||
_repDistances[i] = _repDistances[i-1];
|
||
_repDistances[0] = distance;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
CMyBitEncoder_Encode(&_isRep[_state],0);
|
||
CState_UpdateMatch(_state);
|
||
CPriceTableEncoder_Encode(&_lenEncoder,len-kMatchMinLen,posState);
|
||
pos -= kNumRepDistances;
|
||
posSlot = GetPosSlot(pos);
|
||
lenToPosState = GetLenToPosState(len);
|
||
CBitTreeEncoder_Encode(&_posSlotEncoder[lenToPosState],posSlot);
|
||
if (posSlot >= kStartPosModelIndex)
|
||
{
|
||
unsigned footerBits;
|
||
unsigned base,posReduced;
|
||
footerBits = (posSlot>>1)-1;
|
||
base = (2 | (posSlot&1)) << footerBits;
|
||
posReduced = pos-base;
|
||
if (posSlot < kEndPosModelIndex)
|
||
ReverseBitTreeEncode(_posEncoders+base-posSlot-1,
|
||
footerBits,posReduced);
|
||
else
|
||
{
|
||
RangeEncoder_EncodeDirectBits(posReduced>>kNumAlignBits,footerBits-kNumAlignBits);
|
||
CBitTreeEncoder_ReverseEncode(&_posAlignEncoder,posReduced&kAlignMask);
|
||
if (--_alignPriceCount == 0)
|
||
FillAlignPrices();
|
||
}
|
||
}
|
||
distance = pos;
|
||
for (i=kNumRepDistances-1;i;i--)
|
||
_repDistances[i] = _repDistances[i-1];
|
||
_repDistances[0] = distance;
|
||
}
|
||
_previousByte = GetIndexByte(len-1-_additionalOffset);
|
||
}
|
||
_additionalOffset -= len;
|
||
nowPos64 += len;
|
||
if (nowPos64 - lastPosSlotFillingPos >= (1<<9))
|
||
{
|
||
FillPosSlotPrices();
|
||
FillDistancesPrices();
|
||
lastPosSlotFillingPos = nowPos64;
|
||
}
|
||
if (!_additionalOffset)
|
||
{
|
||
if (GetNumAvailableBytes() == 0)
|
||
{
|
||
CEncoder_Flush();
|
||
return false;
|
||
}
|
||
if (nowPos64 - progressPosValuePrev >= (1<<12))
|
||
{
|
||
_finished = false;
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
extern void __stdcall lzma_set_dict_size(
|
||
unsigned logdictsize)
|
||
{
|
||
_dictionarySize = 1 << logdictsize;
|
||
_distTableSize = logdictsize*2;
|
||
}
|
||
|
||
extern unsigned __stdcall lzma_compress(
|
||
const void* source,
|
||
void* destination,
|
||
unsigned length,
|
||
void* workmem)
|
||
{
|
||
FastPosInit();
|
||
//memset(&encoder,0,sizeof(encoder));
|
||
//memset(&rangeEncoder,0,sizeof(rangeEncoder));
|
||
// CEncoder::CEncoder, CEncoder::SetCoderProperties
|
||
_numFastBytes = 128;
|
||
#ifdef FOR_KERPACK
|
||
_posStateBits = 0;
|
||
_posStateMask = 0;
|
||
#else
|
||
_posStateBits = 2;
|
||
_posStateMask = 3;
|
||
#endif
|
||
_numLiteralContextBits = 3;
|
||
_numLiteralPosStateBits = 0;
|
||
_writeEndMark = false;
|
||
// CEncoder::Code - <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>!
|
||
_finished = false;
|
||
CEncoder_Create(workmem);
|
||
CEncoder_Init();
|
||
FillPosSlotPrices();
|
||
FillDistancesPrices();
|
||
FillAlignPrices();
|
||
CPriceTableEncoder_SetTableSize(&_lenEncoder,_numFastBytes+1-kMatchMinLen);
|
||
CPriceTableEncoder_UpdateTables(&_lenEncoder,1<<_posStateBits);
|
||
CPriceTableEncoder_SetTableSize(&_repMatchLenEncoder,_numFastBytes+1-kMatchMinLen);
|
||
CPriceTableEncoder_UpdateTables(&_repMatchLenEncoder,1<<_posStateBits);
|
||
lastPosSlotFillingPos = 0;
|
||
nowPos64 = 0;
|
||
pack_length = length;
|
||
pack_pos = 0;
|
||
curin = (const byte*)source;
|
||
curout = (byte*)destination;
|
||
MatchFinder_Init();
|
||
while (CodeOneBlock()) ;
|
||
return curout - (byte*)destination;
|
||
}
|