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 }
private 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); }
private 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 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 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 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); }