internal SEE2Context makeEscFreq(ModelPPM model, int numMasked, out int escFreq)
{
SEE2Context psee2c;
int numStats = NumStats;
int nonMasked = numStats - numMasked;
if (numStats != 256)
{
PPMContext suff = getTempPPMContext(model.Heap);
suff.Address = getSuffix();
int idx1 = model.getNS2Indx()[nonMasked - 1];
int idx2 = 0;
idx2 += ((nonMasked < suff.NumStats - numStats) ? 1 : 0);
idx2 += 2 * ((freqData.SummFreq < 11 * numStats) ? 1 : 0);
idx2 += 4 * ((numMasked > nonMasked) ? 1 : 0);
idx2 += model.HiBitsFlag;
psee2c = model.getSEE2Cont()[idx1][idx2];
escFreq = psee2c.Mean;
}
else
{
psee2c = model.DummySEE2Cont;
escFreq = 1;
}
return(psee2c);
}
public PpmdStream(PpmdProperties properties, Stream stream, bool compress)
{
this.properties = properties;
this.stream = stream;
this.compress = compress;
if (properties.Version == PpmdVersion.I1)
{
model = new I1.Model();
if (compress)
model.EncodeStart(properties);
else
model.DecodeStart(stream, properties);
}
if (properties.Version == PpmdVersion.H)
{
modelH = new H.ModelPPM();
if (compress)
throw new NotImplementedException();
else
modelH.decodeInit(stream, properties.ModelOrder, properties.AllocatorSize);
}
if (properties.Version == PpmdVersion.H7z)
{
modelH = new H.ModelPPM();
if (compress)
throw new NotImplementedException();
else
modelH.decodeInit(null, properties.ModelOrder, properties.AllocatorSize);
decoder = new LZMA.RangeCoder.Decoder();
decoder.Init(stream);
}
}
internal void decodeBinSymbol(ModelPPM model)
{
State rs = tempState1.Initialize(model.Heap);
rs.Address = oneState.Address; // State&
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
int off1 = rs.Freq - 1;
int off2 = getArrayIndex(model, rs);
int bs = model.BinSumm[off1][off2];
if (model.Coder.GetCurrentShiftCount(ModelPPM.TOT_BITS) < bs)
{
model.FoundState.Address = rs.Address;
rs.IncrementFreq((rs.Freq < 128) ? 1 : 0);
model.Coder.SubRange.LowCount = 0;
model.Coder.SubRange.HighCount = bs;
bs = ((bs + ModelPPM.INTERVAL - getMean(bs, ModelPPM.PERIOD_BITS, 2)) & 0xffff);
model.BinSumm[off1][off2] = bs;
model.PrevSuccess = 1;
model.incRunLength(1);
}
else
{
model.Coder.SubRange.LowCount = bs;
bs = (bs - getMean(bs, ModelPPM.PERIOD_BITS, 2)) & 0xFFFF;
model.BinSumm[off1][off2] = bs;
model.Coder.SubRange.HighCount = ModelPPM.BIN_SCALE;
model.InitEsc = ExpEscape[Utility.URShift(bs, 10)];
model.NumMasked = 1;
model.CharMask[rs.Symbol] = model.EscCount;
model.PrevSuccess = 0;
model.FoundState.Address = 0;
}
//int a = 0;//TODO just 4 debugging
}
internal bool decodeSymbol2(ModelPPM model)
{
long count;
int hiCnt, i = NumStats - model.NumMasked;
SEE2Context psee2c = makeEscFreq2(model, i);
RangeCoder coder = model.Coder;
// STATE* ps[256], ** pps=ps, * p=U.Stats-1;
State p = tempState1.Initialize(model.Heap);
State temp = tempState2.Initialize(model.Heap);
p.Address = freqData.GetStats() - State.Size;
int pps = 0;
hiCnt = 0;
do
{
do
{
p.IncrementAddress(); // p++;
} while (model.CharMask[p.Symbol] == model.EscCount);
hiCnt += p.Freq;
ps[pps++] = p.Address;
} while (--i != 0);
coder.SubRange.incScale(hiCnt);
count = coder.CurrentCount;
if (count >= coder.SubRange.Scale)
{
return(false);
}
pps = 0;
p.Address = ps[pps];
if (count < hiCnt)
{
hiCnt = 0;
while ((hiCnt += p.Freq) <= count)
{
p.Address = ps[++pps]; // p=*++pps;
}
coder.SubRange.HighCount = hiCnt;
coder.SubRange.LowCount = hiCnt - p.Freq;
psee2c.update();
update2(model, p.Address);
}
else
{
coder.SubRange.LowCount = hiCnt;
coder.SubRange.HighCount = coder.SubRange.Scale;
i = NumStats - model.NumMasked; // ->NumMasked;
pps--;
do
{
temp.Address = ps[++pps]; // (*++pps)
model.CharMask[temp.Symbol] = model.EscCount;
} while (--i != 0);
psee2c.incSumm((int)coder.SubRange.Scale);
model.NumMasked = NumStats;
}
return(true);
}
internal void decodeBinSymbol(ModelPPM model)
{
SharpCompress.Compressor.PPMd.H.State rs = this.tempState1.Initialize(model.Heap);
rs.Address = this.oneState.Address;
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
int index = rs.Freq - 1;
int num2 = this.getArrayIndex(model, rs);
int summ = model.BinSumm[index][num2];
if (model.Coder.GetCurrentShiftCount(ModelPPM.TOT_BITS) < summ)
{
model.FoundState.Address = rs.Address;
rs.IncrementFreq((rs.Freq < 0x80) ? 1 : 0);
model.Coder.SubRange.LowCount = 0L;
model.Coder.SubRange.HighCount = summ;
summ = ((summ + ModelPPM.INTERVAL) - this.getMean(summ, 7, 2)) & 0xffff;
model.BinSumm[index][num2] = summ;
model.PrevSuccess = 1;
model.incRunLength(1);
}
else
{
model.Coder.SubRange.LowCount = summ;
summ = (summ - this.getMean(summ, 7, 2)) & 0xffff;
model.BinSumm[index][num2] = summ;
model.Coder.SubRange.HighCount = ModelPPM.BIN_SCALE;
model.InitEsc = ExpEscape[Utility.URShift(summ, 10)];
model.NumMasked = 1;
model.CharMask[rs.Symbol] = model.EscCount;
model.PrevSuccess = 0;
model.FoundState.Address = 0;
}
}
private SEE2Context makeEscFreq2(ModelPPM model, int Diff)
{
SEE2Context psee2c;
int numStats = NumStats;
if (numStats != 256)
{
PPMContext suff = getTempPPMContext(model.Heap);
suff.Address = getSuffix();
int idx1 = model.getNS2Indx()[Diff - 1];
int idx2 = 0;
idx2 += ((Diff < suff.NumStats - numStats) ? 1 : 0);
idx2 += 2 * ((freqData.SummFreq < 11 * numStats) ? 1 : 0);
idx2 += 4 * ((model.NumMasked > Diff) ? 1 : 0);
idx2 += model.HiBitsFlag;
psee2c = model.getSEE2Cont()[idx1][idx2];
model.Coder.SubRange.Scale = psee2c.Mean;
}
else
{
psee2c = model.DummySEE2Cont;
model.Coder.SubRange.Scale = 1;
}
return(psee2c);
}
internal bool decodeSymbol2(ModelPPM model)
{
int diff = this.NumStats - model.NumMasked;
SEE2Context context = this.makeEscFreq2(model, diff);
RangeCoder coder = model.Coder;
SharpCompress.Compressor.PPMd.H.State state = this.tempState1.Initialize(model.Heap);
SharpCompress.Compressor.PPMd.H.State state2 = this.tempState2.Initialize(model.Heap);
state.Address = this.freqData.GetStats() - 6;
int index = 0;
int dScale = 0;
do
{
do
{
state.IncrementAddress();
}while (model.CharMask[state.Symbol] == model.EscCount);
dScale += state.Freq;
this.ps[index++] = state.Address;
}while (--diff != 0);
coder.SubRange.incScale(dScale);
long currentCount = coder.CurrentCount;
if (currentCount >= coder.SubRange.Scale)
{
return(false);
}
index = 0;
state.Address = this.ps[index];
if (currentCount < dScale)
{
dScale = 0;
while ((dScale += state.Freq) <= currentCount)
{
state.Address = this.ps[++index];
}
coder.SubRange.HighCount = dScale;
coder.SubRange.LowCount = dScale - state.Freq;
context.update();
this.update2(model, state.Address);
}
else
{
coder.SubRange.LowCount = dScale;
coder.SubRange.HighCount = coder.SubRange.Scale;
diff = this.NumStats - model.NumMasked;
index--;
do
{
state2.Address = this.ps[++index];
model.CharMask[state2.Symbol] = model.EscCount;
}while (--diff != 0);
context.incSumm((int)coder.SubRange.Scale);
model.NumMasked = this.NumStats;
}
return(true);
}
internal int getArrayIndex(ModelPPM Model, SharpCompress.Compressor.PPMd.H.State rs)
{
PPMContext context = this.getTempPPMContext(Model.SubAlloc.Heap);
context.Address = this.getSuffix();
int num = 0;
num += Model.PrevSuccess;
num += Model.getNS2BSIndx()[context.NumStats - 1];
num += Model.HiBitsFlag + (2 * Model.getHB2Flag()[rs.Symbol]);
return(num + (Utility.URShift(Model.RunLength, 0x1a) & 0x20));
}
internal void update1_0(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.PrevSuccess = 2 * model.FoundState.Freq > freqData.SummFreq ? 1 : 0;
model.incRunLength(model.PrevSuccess);
freqData.IncrementSummFreq(4);
model.FoundState.IncrementFreq(4);
if (model.FoundState.Freq > ModelPPM.MAX_FREQ)
{
rescale(model);
}
}
internal void update1_0(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.PrevSuccess = ((2 * model.FoundState.Freq) > this.freqData.SummFreq) ? 1 : 0;
model.incRunLength(model.PrevSuccess);
this.freqData.IncrementSummFreq(4);
model.FoundState.IncrementFreq(4);
if (model.FoundState.Freq > 0x7c)
{
this.rescale(model);
}
}
internal int getArrayIndex(ModelPPM Model, State rs)
{
PPMContext tempSuffix = getTempPPMContext(Model.SubAlloc.Heap);
tempSuffix.Address = getSuffix();
int ret = 0;
ret += Model.PrevSuccess;
ret += Model.getNS2BSIndx()[tempSuffix.NumStats - 1];
ret += Model.HiBitsFlag + 2 * Model.getHB2Flag()[rs.Symbol];
ret += ((Utility.URShift(Model.RunLength, 26)) & 0x20);
return(ret);
}
internal void update2(ModelPPM model, int p)
{
SharpCompress.Compressor.PPMd.H.State state = this.tempState5.Initialize(model.Heap);
state.Address = p;
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
this.freqData.IncrementSummFreq(4);
if (state.Freq > 0x7c)
{
this.rescale(model);
}
model.incEscCount(1);
model.RunLength = model.InitRL;
}
internal int createChild(ModelPPM model, State pStats, StateRef firstState)
{
PPMContext pc = getTempPPMContext(model.SubAlloc.Heap);
pc.Address = model.SubAlloc.allocContext();
if (pc != null)
{
pc.NumStats = 1;
pc.setOneState(firstState);
pc.setSuffix(this);
pStats.SetSuccessor(pc);
}
return(pc.Address);
}
internal int createChild(ModelPPM model, SharpCompress.Compressor.PPMd.H.State pStats, StateRef firstState)
{
PPMContext successor = this.getTempPPMContext(model.SubAlloc.Heap);
successor.Address = model.SubAlloc.allocContext();
if (successor != null)
{
successor.NumStats = 1;
successor.setOneState(firstState);
successor.setSuffix(this);
pStats.SetSuccessor(successor);
}
return(successor.Address);
}
internal void update2(ModelPPM model, int p)
{
State temp = tempState5.Initialize(model.Heap);
temp.Address = p;
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
freqData.IncrementSummFreq(4);
if (temp.Freq > ModelPPM.MAX_FREQ)
{
rescale(model);
}
model.incEscCount(1);
model.RunLength = model.InitRL;
}
public PpmdStream(PpmdProperties properties, Stream stream, bool compress)
{
this.properties = properties;
this.stream = stream;
this.compress = compress;
if (properties.Version == PpmdVersion.I1)
{
model = new I1.Model();
if (compress)
{
model.EncodeStart(properties);
}
else
{
model.DecodeStart(stream, properties);
}
}
if (properties.Version == PpmdVersion.H)
{
modelH = new H.ModelPPM();
if (compress)
{
throw new NotImplementedException();
}
else
{
modelH.decodeInit(stream, properties.ModelOrder, properties.AllocatorSize);
}
}
if (properties.Version == PpmdVersion.H7z)
{
modelH = new H.ModelPPM();
if (compress)
{
throw new NotImplementedException();
}
else
{
modelH.decodeInit(null, properties.ModelOrder, properties.AllocatorSize);
}
decoder = new LZMA.RangeCoder.Decoder();
decoder.Init(stream);
}
}
internal void update1(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
this.freqData.IncrementSummFreq(4);
SharpCompress.Compressor.PPMd.H.State state = this.tempState3.Initialize(model.Heap);
SharpCompress.Compressor.PPMd.H.State state2 = this.tempState4.Initialize(model.Heap);
state.Address = p;
state2.Address = p - 6;
if (state.Freq > state2.Freq)
{
SharpCompress.Compressor.PPMd.H.State.PPMDSwap(state, state2);
model.FoundState.Address = state2.Address;
if (state2.Freq > 0x7c)
{
this.rescale(model);
}
}
}
// public static void ppmdSwap(ModelPPM model, StatePtr state1, StatePtr state2)
// {
// byte[] bytes = model.getSubAlloc().getHeap();
// int p1 = state1.Address;
// int p2 = state2.Address;
//
// for (int i = 0; i < StatePtr.size; i++) {
// byte temp = bytes[p1+i];
// bytes[p1+i] = bytes[p2+i];
// bytes[p2+i] = temp;
// }
// state1.Address=p1);
// state2.Address=p2);
// }
internal void update1(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
freqData.IncrementSummFreq(4);
State p0 = tempState3.Initialize(model.Heap);
State p1 = tempState4.Initialize(model.Heap);
p0.Address = p;
p1.Address = p - State.Size;
if (p0.Freq > p1.Freq)
{
State.PPMDSwap(p0, p1);
model.FoundState.Address = p1.Address;
if (p1.Freq > ModelPPM.MAX_FREQ)
{
rescale(model);
}
}
}
private SEE2Context makeEscFreq2(ModelPPM model, int Diff)
{
SEE2Context context;
int numStats = this.NumStats;
if (numStats != 0x100)
{
PPMContext context2 = this.getTempPPMContext(model.Heap);
context2.Address = this.getSuffix();
int index = model.getNS2Indx()[Diff - 1];
int num3 = 0;
num3 += (Diff < (context2.NumStats - numStats)) ? 1 : 0;
num3 += 2 * ((this.freqData.SummFreq < (11 * numStats)) ? 1 : 0);
num3 += 4 * ((model.NumMasked > Diff) ? 1 : 0);
num3 += model.HiBitsFlag;
context = model.getSEE2Cont()[index][num3];
model.Coder.SubRange.Scale = context.Mean;
return(context);
}
context = model.DummySEE2Cont;
model.Coder.SubRange.Scale = 1L;
return(context);
}
internal SEE2Context makeEscFreq(ModelPPM model, int numMasked, out int escFreq)
{
SEE2Context context;
int numStats = this.NumStats;
int num2 = numStats - numMasked;
if (numStats != 0x100)
{
PPMContext context2 = this.getTempPPMContext(model.Heap);
context2.Address = this.getSuffix();
int index = model.getNS2Indx()[num2 - 1];
int num4 = 0;
num4 += (num2 < (context2.NumStats - numStats)) ? 1 : 0;
num4 += 2 * ((this.freqData.SummFreq < (11 * numStats)) ? 1 : 0);
num4 += 4 * ((numMasked > num2) ? 1 : 0);
num4 += model.HiBitsFlag;
context = model.getSEE2Cont()[index][num4];
escFreq = context.Mean;
return(context);
}
context = model.DummySEE2Cont;
escFreq = 1;
return(context);
}
internal void decodeBinSymbol(ModelPPM model)
{
SharpCompress.Compressor.PPMd.H.State rs = this.tempState1.Initialize(model.Heap);
rs.Address = this.oneState.Address;
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
int index = rs.Freq - 1;
int num2 = this.getArrayIndex(model, rs);
int summ = model.BinSumm[index][num2];
if (model.Coder.GetCurrentShiftCount(ModelPPM.TOT_BITS) < summ)
{
model.FoundState.Address = rs.Address;
rs.IncrementFreq((rs.Freq < 0x80) ? 1 : 0);
model.Coder.SubRange.LowCount = 0L;
model.Coder.SubRange.HighCount = summ;
summ = ((summ + ModelPPM.INTERVAL) - this.getMean(summ, 7, 2)) & 0xffff;
model.BinSumm[index][num2] = summ;
model.PrevSuccess = 1;
model.incRunLength(1);
}
else
{
model.Coder.SubRange.LowCount = summ;
summ = (summ - this.getMean(summ, 7, 2)) & 0xffff;
model.BinSumm[index][num2] = summ;
model.Coder.SubRange.HighCount = ModelPPM.BIN_SCALE;
model.InitEsc = ExpEscape[Utility.URShift(summ, 10)];
model.NumMasked = 1;
model.CharMask[rs.Symbol] = model.EscCount;
model.PrevSuccess = 0;
model.FoundState.Address = 0;
}
}
internal bool decodeSymbol1(ModelPPM model)
{
RangeCoder coder = model.Coder;
coder.SubRange.Scale = freqData.SummFreq;
State p = new State(model.Heap);
p.Address = freqData.GetStats();
int i, HiCnt;
long count = coder.CurrentCount;
if (count >= coder.SubRange.Scale)
{
return false;
}
if (count < (HiCnt = p.Freq))
{
coder.SubRange.HighCount = HiCnt;
model.PrevSuccess = (2 * HiCnt > coder.SubRange.Scale) ? 1 : 0;
model.incRunLength(model.PrevSuccess);
HiCnt += 4;
model.FoundState.Address = p.Address;
model.FoundState.Freq = HiCnt;
freqData.IncrementSummFreq(4);
if (HiCnt > ModelPPM.MAX_FREQ)
{
rescale(model);
}
coder.SubRange.LowCount = 0;
return true;
}
else
{
if (model.FoundState.Address == 0)
{
return (false);
}
}
model.PrevSuccess = 0;
int numStats = NumStats;
i = numStats - 1;
while ((HiCnt += p.IncrementAddress().Freq) <= count)
{
if (--i == 0)
{
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
coder.SubRange.LowCount = HiCnt;
model.CharMask[p.Symbol] = model.EscCount;
model.NumMasked = numStats;
i = numStats - 1;
model.FoundState.Address = 0;
do
{
model.CharMask[p.DecrementAddress().Symbol] = model.EscCount;
}
while (--i != 0);
coder.SubRange.HighCount = coder.SubRange.Scale;
return (true);
}
}
coder.SubRange.LowCount = HiCnt - p.Freq;
coder.SubRange.HighCount = HiCnt;
update1(model, p.Address);
return (true);
}
internal void rescale(ModelPPM model)
{
StateRef ref2;
int numStats = this.NumStats;
int num2 = this.NumStats - 1;
SharpCompress.Compressor.PPMd.H.State state = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
SharpCompress.Compressor.PPMd.H.State state2 = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
SharpCompress.Compressor.PPMd.H.State state3 = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
state2.Address = model.FoundState.Address;
while (state2.Address != this.freqData.GetStats())
{
state3.Address = state2.Address - 6;
SharpCompress.Compressor.PPMd.H.State.PPMDSwap(state2, state3);
state2.DecrementAddress();
}
state3.Address = this.freqData.GetStats();
state3.IncrementFreq(4);
this.freqData.IncrementSummFreq(4);
int number = this.freqData.SummFreq - state2.Freq;
int num3 = (model.OrderFall != 0) ? 1 : 0;
state2.Freq = Utility.URShift((int)(state2.Freq + num3), 1);
this.freqData.SummFreq = state2.Freq;
do
{
state2.IncrementAddress();
number -= state2.Freq;
state2.Freq = Utility.URShift((int)(state2.Freq + num3), 1);
this.freqData.IncrementSummFreq(state2.Freq);
state3.Address = state2.Address - 6;
if (state2.Freq > state3.Freq)
{
state.Address = state2.Address;
ref2 = new StateRef();
ref2.Values = state;
SharpCompress.Compressor.PPMd.H.State ptr = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
SharpCompress.Compressor.PPMd.H.State state5 = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
do
{
ptr.Address = state.Address - 6;
state.SetValues(ptr);
state.DecrementAddress();
state5.Address = state.Address - 6;
}while ((state.Address != this.freqData.GetStats()) && (ref2.Freq > state5.Freq));
state.SetValues(ref2);
}
}while (--num2 != 0);
if (state2.Freq == 0)
{
do
{
num2++;
state2.DecrementAddress();
}while (state2.Freq == 0);
number += num2;
this.NumStats -= num2;
if (this.NumStats == 1)
{
ref2 = new StateRef();
state3.Address = this.freqData.GetStats();
ref2.Values = state3;
do
{
ref2.DecrementFreq(Utility.URShift(ref2.Freq, 1));
number = Utility.URShift(number, 1);
}while (number > 1);
model.SubAlloc.freeUnits(this.freqData.GetStats(), Utility.URShift((int)(numStats + 1), 1));
this.oneState.SetValues(ref2);
model.FoundState.Address = this.oneState.Address;
return;
}
}
number -= Utility.URShift(number, 1);
this.freqData.IncrementSummFreq(number);
int oldNU = Utility.URShift((int)(numStats + 1), 1);
int newNU = Utility.URShift((int)(this.NumStats + 1), 1);
if (oldNU != newNU)
{
this.freqData.SetStats(model.SubAlloc.shrinkUnits(this.freqData.GetStats(), oldNU, newNU));
}
model.FoundState.Address = this.freqData.GetStats();
}
private SEE2Context makeEscFreq2(ModelPPM model, int Diff)
{
SEE2Context psee2c;
int numStats = NumStats;
if (numStats != 256)
{
PPMContext suff = getTempPPMContext(model.Heap);
suff.Address = getSuffix();
int idx1 = model.getNS2Indx()[Diff - 1];
int idx2 = 0;
idx2 += ((Diff < suff.NumStats - numStats) ? 1 : 0);
idx2 += 2 * ((freqData.SummFreq < 11 * numStats) ? 1 : 0);
idx2 += 4 * ((model.NumMasked > Diff) ? 1 : 0);
idx2 += model.HiBitsFlag;
psee2c = model.getSEE2Cont()[idx1][idx2];
model.Coder.SubRange.Scale = psee2c.Mean;
}
else
{
psee2c = model.DummySEE2Cont;
model.Coder.SubRange.Scale = 1;
}
return psee2c;
}
internal SEE2Context makeEscFreq(ModelPPM model, int numMasked, out int escFreq)
{
SEE2Context psee2c;
int numStats = NumStats;
int nonMasked = numStats - numMasked;
if (numStats != 256)
{
PPMContext suff = getTempPPMContext(model.Heap);
suff.Address = getSuffix();
int idx1 = model.getNS2Indx()[nonMasked - 1];
int idx2 = 0;
idx2 += ((nonMasked < suff.NumStats - numStats) ? 1 : 0);
idx2 += 2 * ((freqData.SummFreq < 11 * numStats) ? 1 : 0);
idx2 += 4 * ((numMasked > nonMasked) ? 1 : 0);
idx2 += model.HiBitsFlag;
psee2c = model.getSEE2Cont()[idx1][idx2];
escFreq = psee2c.Mean;
}
else
{
psee2c = model.DummySEE2Cont;
escFreq = 1;
}
return psee2c;
}
internal void update1(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
this.freqData.IncrementSummFreq(4);
SharpCompress.Compressor.PPMd.H.State state = this.tempState3.Initialize(model.Heap);
SharpCompress.Compressor.PPMd.H.State state2 = this.tempState4.Initialize(model.Heap);
state.Address = p;
state2.Address = p - 6;
if (state.Freq > state2.Freq)
{
SharpCompress.Compressor.PPMd.H.State.PPMDSwap(state, state2);
model.FoundState.Address = state2.Address;
if (state2.Freq > 0x7c)
{
this.rescale(model);
}
}
}
private SEE2Context makeEscFreq2(ModelPPM model, int Diff)
{
SEE2Context context;
int numStats = this.NumStats;
if (numStats != 0x100)
{
PPMContext context2 = this.getTempPPMContext(model.Heap);
context2.Address = this.getSuffix();
int index = model.getNS2Indx()[Diff - 1];
int num3 = 0;
num3 += (Diff < (context2.NumStats - numStats)) ? 1 : 0;
num3 += 2 * ((this.freqData.SummFreq < (11 * numStats)) ? 1 : 0);
num3 += 4 * ((model.NumMasked > Diff) ? 1 : 0);
num3 += model.HiBitsFlag;
context = model.getSEE2Cont()[index][num3];
model.Coder.SubRange.Scale = context.Mean;
return context;
}
context = model.DummySEE2Cont;
model.Coder.SubRange.Scale = 1L;
return context;
}
// public static void ppmdSwap(ModelPPM model, StatePtr state1, StatePtr state2)
// {
// byte[] bytes = model.getSubAlloc().getHeap();
// int p1 = state1.Address;
// int p2 = state2.Address;
//
// for (int i = 0; i < StatePtr.size; i++) {
// byte temp = bytes[p1+i];
// bytes[p1+i] = bytes[p2+i];
// bytes[p2+i] = temp;
// }
// state1.Address=p1);
// state2.Address=p2);
// }
internal void update1(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
freqData.IncrementSummFreq(4);
State p0 = tempState3.Initialize(model.Heap);
State p1 = tempState4.Initialize(model.Heap);
p0.Address = p;
p1.Address = p - State.Size;
if (p0.Freq > p1.Freq)
{
State.PPMDSwap(p0, p1);
model.FoundState.Address = p1.Address;
if (p1.Freq > ModelPPM.MAX_FREQ)
rescale(model);
}
}
internal bool decodeSymbol1(ModelPPM model)
{
int num2;
RangeCoder coder = model.Coder;
coder.SubRange.Scale = this.freqData.SummFreq;
SharpCompress.Compressor.PPMd.H.State state = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
state.Address = this.freqData.GetStats();
long currentCount = coder.CurrentCount;
if (currentCount >= coder.SubRange.Scale)
{
return(false);
}
if (currentCount < (num2 = state.Freq))
{
coder.SubRange.HighCount = num2;
model.PrevSuccess = ((2 * num2) > coder.SubRange.Scale) ? 1 : 0;
model.incRunLength(model.PrevSuccess);
num2 += 4;
model.FoundState.Address = state.Address;
model.FoundState.Freq = num2;
this.freqData.IncrementSummFreq(4);
if (num2 > 0x7c)
{
this.rescale(model);
}
coder.SubRange.LowCount = 0L;
return(true);
}
if (model.FoundState.Address == 0)
{
return(false);
}
model.PrevSuccess = 0;
int numStats = this.NumStats;
int num = numStats - 1;
while ((num2 += state.IncrementAddress().Freq) <= currentCount)
{
if (--num == 0)
{
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
coder.SubRange.LowCount = num2;
model.CharMask[state.Symbol] = model.EscCount;
model.NumMasked = numStats;
num = numStats - 1;
model.FoundState.Address = 0;
do
{
model.CharMask[state.DecrementAddress().Symbol] = model.EscCount;
}while (--num != 0);
coder.SubRange.HighCount = coder.SubRange.Scale;
return(true);
}
}
coder.SubRange.LowCount = num2 - state.Freq;
coder.SubRange.HighCount = num2;
this.update1(model, state.Address);
return(true);
}
internal bool decodeSymbol1(ModelPPM model)
{
int num2;
RangeCoder coder = model.Coder;
coder.SubRange.Scale = this.freqData.SummFreq;
SharpCompress.Compressor.PPMd.H.State state = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
state.Address = this.freqData.GetStats();
long currentCount = coder.CurrentCount;
if (currentCount >= coder.SubRange.Scale)
{
return false;
}
if (currentCount < (num2 = state.Freq))
{
coder.SubRange.HighCount = num2;
model.PrevSuccess = ((2 * num2) > coder.SubRange.Scale) ? 1 : 0;
model.incRunLength(model.PrevSuccess);
num2 += 4;
model.FoundState.Address = state.Address;
model.FoundState.Freq = num2;
this.freqData.IncrementSummFreq(4);
if (num2 > 0x7c)
{
this.rescale(model);
}
coder.SubRange.LowCount = 0L;
return true;
}
if (model.FoundState.Address == 0)
{
return false;
}
model.PrevSuccess = 0;
int numStats = this.NumStats;
int num = numStats - 1;
while ((num2 += state.IncrementAddress().Freq) <= currentCount)
{
if (--num == 0)
{
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
coder.SubRange.LowCount = num2;
model.CharMask[state.Symbol] = model.EscCount;
model.NumMasked = numStats;
num = numStats - 1;
model.FoundState.Address = 0;
do
{
model.CharMask[state.DecrementAddress().Symbol] = model.EscCount;
}
while (--num != 0);
coder.SubRange.HighCount = coder.SubRange.Scale;
return true;
}
}
coder.SubRange.LowCount = num2 - state.Freq;
coder.SubRange.HighCount = num2;
this.update1(model, state.Address);
return true;
}
internal void decodeBinSymbol(ModelPPM model)
{
State rs = tempState1.Initialize(model.Heap);
rs.Address = oneState.Address; // State&
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
int off1 = rs.Freq - 1;
int off2 = getArrayIndex(model, rs);
int bs = model.BinSumm[off1][off2];
if (model.Coder.GetCurrentShiftCount(ModelPPM.TOT_BITS) < bs)
{
model.FoundState.Address = rs.Address;
rs.IncrementFreq((rs.Freq < 128) ? 1 : 0);
model.Coder.SubRange.LowCount = 0;
model.Coder.SubRange.HighCount = bs;
bs = ((bs + ModelPPM.INTERVAL - getMean(bs, ModelPPM.PERIOD_BITS, 2)) & 0xffff);
model.BinSumm[off1][off2] = bs;
model.PrevSuccess = 1;
model.incRunLength(1);
}
else
{
model.Coder.SubRange.LowCount = bs;
bs = (bs - getMean(bs, ModelPPM.PERIOD_BITS, 2)) & 0xFFFF;
model.BinSumm[off1][off2] = bs;
model.Coder.SubRange.HighCount = ModelPPM.BIN_SCALE;
model.InitEsc = ExpEscape[Utility.URShift(bs, 10)];
model.NumMasked = 1;
model.CharMask[rs.Symbol] = model.EscCount;
model.PrevSuccess = 0;
model.FoundState.Address = 0;
}
//int a = 0;//TODO just 4 debugging
}
internal void rescale(ModelPPM model)
{
int OldNS = NumStats, i = NumStats - 1, Adder, EscFreq;
// STATE* p1, * p;
State p1 = new State(model.Heap);
State p = new State(model.Heap);
State temp = new State(model.Heap);
for (p.Address = model.FoundState.Address; p.Address != freqData.GetStats(); p.DecrementAddress())
{
temp.Address = p.Address - State.Size;
State.PPMDSwap(p, temp);
}
temp.Address = freqData.GetStats();
temp.IncrementFreq(4);
freqData.IncrementSummFreq(4);
EscFreq = freqData.SummFreq - p.Freq;
Adder = (model.OrderFall != 0) ? 1 : 0;
p.Freq = Utility.URShift((p.Freq + Adder), 1);
freqData.SummFreq = p.Freq;
do
{
p.IncrementAddress();
EscFreq -= p.Freq;
p.Freq = Utility.URShift((p.Freq + Adder), 1);
freqData.IncrementSummFreq(p.Freq);
temp.Address = p.Address - State.Size;
if (p.Freq > temp.Freq)
{
p1.Address = p.Address;
StateRef tmp = new StateRef();
tmp.Values = p1;
State temp2 = new State(model.Heap);
State temp3 = new State(model.Heap);
do
{
// p1[0]=p1[-1];
temp2.Address = p1.Address - State.Size;
p1.SetValues(temp2);
p1.DecrementAddress();
temp3.Address = p1.Address - State.Size;
}
while (p1.Address != freqData.GetStats() && tmp.Freq > temp3.Freq);
p1.SetValues(tmp);
}
}
while (--i != 0);
if (p.Freq == 0)
{
do
{
i++;
p.DecrementAddress();
}
while (p.Freq == 0);
EscFreq += i;
NumStats = NumStats - i;
if (NumStats == 1)
{
StateRef tmp = new StateRef();
temp.Address = freqData.GetStats();
tmp.Values = temp;
// STATE tmp=*U.Stats;
do
{
// tmp.Freq-=(tmp.Freq >> 1)
tmp.DecrementFreq(Utility.URShift(tmp.Freq, 1));
EscFreq = Utility.URShift(EscFreq, 1);
}
while (EscFreq > 1);
model.SubAlloc.freeUnits(freqData.GetStats(), Utility.URShift((OldNS + 1), 1));
oneState.SetValues(tmp);
model.FoundState.Address = oneState.Address;
return;
}
}
EscFreq -= Utility.URShift(EscFreq, 1);
freqData.IncrementSummFreq(EscFreq);
int n0 = Utility.URShift((OldNS + 1), 1), n1 = Utility.URShift((NumStats + 1), 1);
if (n0 != n1)
{
freqData.SetStats(model.SubAlloc.shrinkUnits(freqData.GetStats(), n0, n1));
}
model.FoundState.Address = freqData.GetStats();
}
internal bool decodeSymbol2(ModelPPM model)
{
int diff = this.NumStats - model.NumMasked;
SEE2Context context = this.makeEscFreq2(model, diff);
RangeCoder coder = model.Coder;
SharpCompress.Compressor.PPMd.H.State state = this.tempState1.Initialize(model.Heap);
SharpCompress.Compressor.PPMd.H.State state2 = this.tempState2.Initialize(model.Heap);
state.Address = this.freqData.GetStats() - 6;
int index = 0;
int dScale = 0;
do
{
do
{
state.IncrementAddress();
}
while (model.CharMask[state.Symbol] == model.EscCount);
dScale += state.Freq;
this.ps[index++] = state.Address;
}
while (--diff != 0);
coder.SubRange.incScale(dScale);
long currentCount = coder.CurrentCount;
if (currentCount >= coder.SubRange.Scale)
{
return false;
}
index = 0;
state.Address = this.ps[index];
if (currentCount < dScale)
{
dScale = 0;
while ((dScale += state.Freq) <= currentCount)
{
state.Address = this.ps[++index];
}
coder.SubRange.HighCount = dScale;
coder.SubRange.LowCount = dScale - state.Freq;
context.update();
this.update2(model, state.Address);
}
else
{
coder.SubRange.LowCount = dScale;
coder.SubRange.HighCount = coder.SubRange.Scale;
diff = this.NumStats - model.NumMasked;
index--;
do
{
state2.Address = this.ps[++index];
model.CharMask[state2.Symbol] = model.EscCount;
}
while (--diff != 0);
context.incSumm((int) coder.SubRange.Scale);
model.NumMasked = this.NumStats;
}
return true;
}
internal int getArrayIndex(ModelPPM Model, SharpCompress.Compressor.PPMd.H.State rs)
{
PPMContext context = this.getTempPPMContext(Model.SubAlloc.Heap);
context.Address = this.getSuffix();
int num = 0;
num += Model.PrevSuccess;
num += Model.getNS2BSIndx()[context.NumStats - 1];
num += Model.HiBitsFlag + (2 * Model.getHB2Flag()[rs.Symbol]);
return (num + (Utility.URShift(Model.RunLength, 0x1a) & 0x20));
}
internal void rescale(ModelPPM model)
{
int OldNS = NumStats, i = NumStats - 1, Adder, EscFreq;
// STATE* p1, * p;
State p1 = new State(model.Heap);
State p = new State(model.Heap);
State temp = new State(model.Heap);
for (p.Address = model.FoundState.Address; p.Address != freqData.GetStats(); p.DecrementAddress())
{
temp.Address = p.Address - State.Size;
State.PPMDSwap(p, temp);
}
temp.Address = freqData.GetStats();
temp.IncrementFreq(4);
freqData.IncrementSummFreq(4);
EscFreq = freqData.SummFreq - p.Freq;
Adder = (model.OrderFall != 0) ? 1 : 0;
p.Freq = Utility.URShift((p.Freq + Adder), 1);
freqData.SummFreq = p.Freq;
do
{
p.IncrementAddress();
EscFreq -= p.Freq;
p.Freq = Utility.URShift((p.Freq + Adder), 1);
freqData.IncrementSummFreq(p.Freq);
temp.Address = p.Address - State.Size;
if (p.Freq > temp.Freq)
{
p1.Address = p.Address;
StateRef tmp = new StateRef();
tmp.Values = p1;
State temp2 = new State(model.Heap);
State temp3 = new State(model.Heap);
do
{
// p1[0]=p1[-1];
temp2.Address = p1.Address - State.Size;
p1.SetValues(temp2);
p1.DecrementAddress();
temp3.Address = p1.Address - State.Size;
} while (p1.Address != freqData.GetStats() && tmp.Freq > temp3.Freq);
p1.SetValues(tmp);
}
} while (--i != 0);
if (p.Freq == 0)
{
do
{
i++;
p.DecrementAddress();
} while (p.Freq == 0);
EscFreq += i;
NumStats = NumStats - i;
if (NumStats == 1)
{
StateRef tmp = new StateRef();
temp.Address = freqData.GetStats();
tmp.Values = temp;
// STATE tmp=*U.Stats;
do
{
// tmp.Freq-=(tmp.Freq >> 1)
tmp.DecrementFreq(Utility.URShift(tmp.Freq, 1));
EscFreq = Utility.URShift(EscFreq, 1);
} while (EscFreq > 1);
model.SubAlloc.freeUnits(freqData.GetStats(), Utility.URShift((OldNS + 1), 1));
oneState.SetValues(tmp);
model.FoundState.Address = oneState.Address;
return;
}
}
EscFreq -= Utility.URShift(EscFreq, 1);
freqData.IncrementSummFreq(EscFreq);
int n0 = Utility.URShift((OldNS + 1), 1), n1 = Utility.URShift((NumStats + 1), 1);
if (n0 != n1)
{
freqData.SetStats(model.SubAlloc.shrinkUnits(freqData.GetStats(), n0, n1));
}
model.FoundState.Address = freqData.GetStats();
}
internal void update1_0(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.PrevSuccess = ((2 * model.FoundState.Freq) > this.freqData.SummFreq) ? 1 : 0;
model.incRunLength(model.PrevSuccess);
this.freqData.IncrementSummFreq(4);
model.FoundState.IncrementFreq(4);
if (model.FoundState.Freq > 0x7c)
{
this.rescale(model);
}
}
internal int createChild(ModelPPM model, SharpCompress.Compressor.PPMd.H.State pStats, StateRef firstState)
{
PPMContext successor = this.getTempPPMContext(model.SubAlloc.Heap);
successor.Address = model.SubAlloc.allocContext();
if (successor != null)
{
successor.NumStats = 1;
successor.setOneState(firstState);
successor.setSuffix(this);
pStats.SetSuccessor(successor);
}
return successor.Address;
}
internal void rescale(ModelPPM model)
{
StateRef ref2;
int numStats = this.NumStats;
int num2 = this.NumStats - 1;
SharpCompress.Compressor.PPMd.H.State state = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
SharpCompress.Compressor.PPMd.H.State state2 = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
SharpCompress.Compressor.PPMd.H.State state3 = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
state2.Address = model.FoundState.Address;
while (state2.Address != this.freqData.GetStats())
{
state3.Address = state2.Address - 6;
SharpCompress.Compressor.PPMd.H.State.PPMDSwap(state2, state3);
state2.DecrementAddress();
}
state3.Address = this.freqData.GetStats();
state3.IncrementFreq(4);
this.freqData.IncrementSummFreq(4);
int number = this.freqData.SummFreq - state2.Freq;
int num3 = (model.OrderFall != 0) ? 1 : 0;
state2.Freq = Utility.URShift((int) (state2.Freq + num3), 1);
this.freqData.SummFreq = state2.Freq;
do
{
state2.IncrementAddress();
number -= state2.Freq;
state2.Freq = Utility.URShift((int) (state2.Freq + num3), 1);
this.freqData.IncrementSummFreq(state2.Freq);
state3.Address = state2.Address - 6;
if (state2.Freq > state3.Freq)
{
state.Address = state2.Address;
ref2 = new StateRef();
ref2.Values = state;
SharpCompress.Compressor.PPMd.H.State ptr = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
SharpCompress.Compressor.PPMd.H.State state5 = new SharpCompress.Compressor.PPMd.H.State(model.Heap);
do
{
ptr.Address = state.Address - 6;
state.SetValues(ptr);
state.DecrementAddress();
state5.Address = state.Address - 6;
}
while ((state.Address != this.freqData.GetStats()) && (ref2.Freq > state5.Freq));
state.SetValues(ref2);
}
}
while (--num2 != 0);
if (state2.Freq == 0)
{
do
{
num2++;
state2.DecrementAddress();
}
while (state2.Freq == 0);
number += num2;
this.NumStats -= num2;
if (this.NumStats == 1)
{
ref2 = new StateRef();
state3.Address = this.freqData.GetStats();
ref2.Values = state3;
do
{
ref2.DecrementFreq(Utility.URShift(ref2.Freq, 1));
number = Utility.URShift(number, 1);
}
while (number > 1);
model.SubAlloc.freeUnits(this.freqData.GetStats(), Utility.URShift((int) (numStats + 1), 1));
this.oneState.SetValues(ref2);
model.FoundState.Address = this.oneState.Address;
return;
}
}
number -= Utility.URShift(number, 1);
this.freqData.IncrementSummFreq(number);
int oldNU = Utility.URShift((int) (numStats + 1), 1);
int newNU = Utility.URShift((int) (this.NumStats + 1), 1);
if (oldNU != newNU)
{
this.freqData.SetStats(model.SubAlloc.shrinkUnits(this.freqData.GetStats(), oldNU, newNU));
}
model.FoundState.Address = this.freqData.GetStats();
}
internal void update1_0(ModelPPM model, int p)
{
model.FoundState.Address = p;
model.PrevSuccess = 2 * model.FoundState.Freq > freqData.SummFreq ? 1 : 0;
model.incRunLength(model.PrevSuccess);
freqData.IncrementSummFreq(4);
model.FoundState.IncrementFreq(4);
if (model.FoundState.Freq > ModelPPM.MAX_FREQ)
rescale(model);
}
internal void update2(ModelPPM model, int p)
{
SharpCompress.Compressor.PPMd.H.State state = this.tempState5.Initialize(model.Heap);
state.Address = p;
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
this.freqData.IncrementSummFreq(4);
if (state.Freq > 0x7c)
{
this.rescale(model);
}
model.incEscCount(1);
model.RunLength = model.InitRL;
}
internal bool decodeSymbol2(ModelPPM model)
{
long count;
int hiCnt, i = NumStats - model.NumMasked;
SEE2Context psee2c = makeEscFreq2(model, i);
RangeCoder coder = model.Coder;
// STATE* ps[256], ** pps=ps, * p=U.Stats-1;
State p = tempState1.Initialize(model.Heap);
State temp = tempState2.Initialize(model.Heap);
p.Address = freqData.GetStats() - State.Size;
int pps = 0;
hiCnt = 0;
do
{
do
{
p.IncrementAddress(); // p++;
}
while (model.CharMask[p.Symbol] == model.EscCount);
hiCnt += p.Freq;
ps[pps++] = p.Address;
}
while (--i != 0);
coder.SubRange.incScale(hiCnt);
count = coder.CurrentCount;
if (count >= coder.SubRange.Scale)
{
return false;
}
pps = 0;
p.Address = ps[pps];
if (count < hiCnt)
{
hiCnt = 0;
while ((hiCnt += p.Freq) <= count)
{
p.Address = ps[++pps]; // p=*++pps;
}
coder.SubRange.HighCount = hiCnt;
coder.SubRange.LowCount = hiCnt - p.Freq;
psee2c.update();
update2(model, p.Address);
}
else
{
coder.SubRange.LowCount = hiCnt;
coder.SubRange.HighCount = coder.SubRange.Scale;
i = NumStats - model.NumMasked; // ->NumMasked;
pps--;
do
{
temp.Address = ps[++pps]; // (*++pps)
model.CharMask[temp.Symbol] = model.EscCount;
}
while (--i != 0);
psee2c.incSumm((int)coder.SubRange.Scale);
model.NumMasked = NumStats;
}
return (true);
}
internal void update2(ModelPPM model, int p)
{
State temp = tempState5.Initialize(model.Heap);
temp.Address = p;
model.FoundState.Address = p;
model.FoundState.IncrementFreq(4);
freqData.IncrementSummFreq(4);
if (temp.Freq > ModelPPM.MAX_FREQ)
{
rescale(model);
}
model.incEscCount(1);
model.RunLength = model.InitRL;
}
internal int getArrayIndex(ModelPPM Model, State rs)
{
PPMContext tempSuffix = getTempPPMContext(Model.SubAlloc.Heap);
tempSuffix.Address = getSuffix();
int ret = 0;
ret += Model.PrevSuccess;
ret += Model.getNS2BSIndx()[tempSuffix.NumStats - 1];
ret += Model.HiBitsFlag + 2 * Model.getHB2Flag()[rs.Symbol];
ret += ((Utility.URShift(Model.RunLength, 26)) & 0x20);
return ret;
}
internal SEE2Context makeEscFreq(ModelPPM model, int numMasked, out int escFreq)
{
SEE2Context context;
int numStats = this.NumStats;
int num2 = numStats - numMasked;
if (numStats != 0x100)
{
PPMContext context2 = this.getTempPPMContext(model.Heap);
context2.Address = this.getSuffix();
int index = model.getNS2Indx()[num2 - 1];
int num4 = 0;
num4 += (num2 < (context2.NumStats - numStats)) ? 1 : 0;
num4 += 2 * ((this.freqData.SummFreq < (11 * numStats)) ? 1 : 0);
num4 += 4 * ((numMasked > num2) ? 1 : 0);
num4 += model.HiBitsFlag;
context = model.getSEE2Cont()[index][num4];
escFreq = context.Mean;
return context;
}
context = model.DummySEE2Cont;
escFreq = 1;
return context;
}
internal bool decodeSymbol1(ModelPPM model)
{
RangeCoder coder = model.Coder;
coder.SubRange.Scale = freqData.SummFreq;
State p = new State(model.Heap);
p.Address = freqData.GetStats();
int i, HiCnt;
long count = coder.CurrentCount;
if (count >= coder.SubRange.Scale)
{
return(false);
}
if (count < (HiCnt = p.Freq))
{
coder.SubRange.HighCount = HiCnt;
model.PrevSuccess = (2 * HiCnt > coder.SubRange.Scale) ? 1 : 0;
model.incRunLength(model.PrevSuccess);
HiCnt += 4;
model.FoundState.Address = p.Address;
model.FoundState.Freq = HiCnt;
freqData.IncrementSummFreq(4);
if (HiCnt > ModelPPM.MAX_FREQ)
{
rescale(model);
}
coder.SubRange.LowCount = 0;
return(true);
}
else
{
if (model.FoundState.Address == 0)
{
return(false);
}
}
model.PrevSuccess = 0;
int numStats = NumStats;
i = numStats - 1;
while ((HiCnt += p.IncrementAddress().Freq) <= count)
{
if (--i == 0)
{
model.HiBitsFlag = model.getHB2Flag()[model.FoundState.Symbol];
coder.SubRange.LowCount = HiCnt;
model.CharMask[p.Symbol] = model.EscCount;
model.NumMasked = numStats;
i = numStats - 1;
model.FoundState.Address = 0;
do
{
model.CharMask[p.DecrementAddress().Symbol] = model.EscCount;
} while (--i != 0);
coder.SubRange.HighCount = coder.SubRange.Scale;
return(true);
}
}
coder.SubRange.LowCount = HiCnt - p.Freq;
coder.SubRange.HighCount = HiCnt;
update1(model, p.Address);
return(true);
}
internal int createChild(ModelPPM model, State pStats, StateRef firstState)
{
PPMContext pc = getTempPPMContext(model.SubAlloc.Heap);
pc.Address = model.SubAlloc.allocContext();
if (pc != null)
{
pc.NumStats = 1;
pc.setOneState(firstState);
pc.setSuffix(this);
pStats.SetSuccessor(pc);
}
return pc.Address;
}
