public byte DecodeNormal(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Decoder rangeDecoder)
{
uint symbol = 1;
do
symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
while (symbol < 0x100);
return (byte)symbol;
}
public void Encode(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Encoder rangeEncoder, byte symbol)
{
uint context = 1;
for (int i = 7; i >= 0; i--)
{
uint bit = (uint)((symbol >> i) & 1);
m_Encoders[context].Encode(rangeEncoder, bit);
context = (context << 1) | bit;
}
}
public uint Decode(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Decoder rangeDecoder, uint posState)
{
if (m_Choice.Decode(rangeDecoder) == 0)
return m_LowCoder[posState].Decode(rangeDecoder);
else
{
uint symbol = Base.kNumLowLenSymbols;
if (m_Choice2.Decode(rangeDecoder) == 0)
symbol += m_MidCoder[posState].Decode(rangeDecoder);
else
{
symbol += Base.kNumMidLenSymbols;
symbol += m_HighCoder.Decode(rangeDecoder);
}
return symbol;
}
}
public byte DecodeWithMatchByte(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Decoder rangeDecoder, byte matchByte)
{
uint symbol = 1;
do
{
uint matchBit = (uint)(matchByte >> 7) & 1;
matchByte <<= 1;
uint bit = m_Decoders[((1 + matchBit) << 8) + symbol].Decode(rangeDecoder);
symbol = (symbol << 1) | bit;
if (matchBit != bit)
{
while (symbol < 0x100)
symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
break;
}
}
while (symbol < 0x100);
return (byte)symbol;
}
public void EncodeMatched(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Encoder rangeEncoder, byte matchByte, byte symbol)
{
uint context = 1;
bool same = true;
for (int i = 7; i >= 0; i--)
{
uint bit = (uint)((symbol >> i) & 1);
uint state = context;
if (same)
{
uint matchBit = (uint)((matchByte >> i) & 1);
state += ((1 + matchBit) << 8);
same = (matchBit == bit);
}
m_Encoders[state].Encode(rangeEncoder, bit);
context = (context << 1) | bit;
}
}
public new void Encode(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Encoder rangeEncoder, UInt32 symbol, UInt32 posState)
{
base.Encode(rangeEncoder, symbol, posState);
if (--_counters[posState] == 0)
UpdateTable(posState);
}
public void Encode(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Encoder rangeEncoder, UInt32 symbol, UInt32 posState)
{
if (symbol < Base.kNumLowLenSymbols)
{
_choice.Encode(rangeEncoder, 0);
_lowCoder[posState].Encode(rangeEncoder, symbol);
}
else
{
symbol -= Base.kNumLowLenSymbols;
_choice.Encode(rangeEncoder, 1);
if (symbol < Base.kNumMidLenSymbols)
{
_choice2.Encode(rangeEncoder, 0);
_midCoder[posState].Encode(rangeEncoder, symbol);
}
else
{
_choice2.Encode(rangeEncoder, 1);
_highCoder.Encode(rangeEncoder, symbol - Base.kNumMidLenSymbols);
}
}
}
public byte DecodeWithMatchByte(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte, byte matchByte)
{ return m_Coders[GetState(pos, prevByte)].DecodeWithMatchByte(rangeDecoder, matchByte); }
public byte DecodeNormal(Powerasp.Enterprise.Core.Compress.SevenZip.Compress.RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte)
{ return m_Coders[GetState(pos, prevByte)].DecodeNormal(rangeDecoder); }
