private UInt32 GetRepPrice(UInt32 repIndex, UInt32 len, Base.State state, UInt32 posState)
{
UInt32 price = _repMatchLenEncoder.GetPrice(len - Base.kMatchMinLen, posState);
return price + GetPureRepPrice(repIndex, state, posState);
}
private UInt32 GetPureRepPrice(UInt32 repIndex, Base.State state, UInt32 posState)
{
UInt32 price;
if (repIndex == 0)
{
price = _isRepG0[state.Index].GetPrice0();
price += _isRep0Long[(state.Index << Base.kNumPosStatesBitsMax) + posState].GetPrice1();
}
else
{
price = _isRepG0[state.Index].GetPrice1();
if (repIndex == 1)
price += _isRepG1[state.Index].GetPrice0();
else
{
price += _isRepG1[state.Index].GetPrice1();
price += _isRepG2[state.Index].GetPrice(repIndex - 2);
}
}
return price;
}
private UInt32 GetRepLen1Price(Base.State state, UInt32 posState)
{
return _isRepG0[state.Index].GetPrice0() +
_isRep0Long[(state.Index << Base.kNumPosStatesBitsMax) + posState].GetPrice0();
}
/// <summary>
/// Codes a stream with LZMA algorithm to an output stream
/// </summary>
/// <param name="inStream">The input stream</param>
/// <param name="inSize">The input size</param>
/// <param name="outSize">The output size</param>
/// <param name="outStream">The output stream</param>
/// <param name="progress">Progress interface</param>
public void Code(Stream inStream, Stream outStream,
Int64 inSize, Int64 outSize, ICodeProgress progress)
{
Init(inStream, outStream);
var state = new Base.State();
state.Init();
uint rep0 = 0, rep1 = 0, rep2 = 0, rep3 = 0;
UInt64 nowPos64 = 0;
var outSize64 = (UInt64) outSize;
if (nowPos64 < outSize64)
{
if (m_IsMatchDecoders[state.Index << Base.kNumPosStatesBitsMax].Decode(m_RangeDecoder) != 0)
throw new DataErrorException();
state.UpdateChar();
byte b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, 0, 0);
m_OutWindow.PutByte(b);
nowPos64++;
}
while (nowPos64 < outSize64)
{
// UInt64 next = Math.Min(nowPos64 + (1 << 18), outSize64);
// while(nowPos64 < next)
{
uint posState = (uint) nowPos64 & m_PosStateMask;
if (
m_IsMatchDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) ==
0)
{
byte b;
byte prevByte = m_OutWindow.GetByte(0);
if (!state.IsCharState())
b = m_LiteralDecoder.DecodeWithMatchByte(m_RangeDecoder,
(uint) nowPos64, prevByte,
m_OutWindow.GetByte(rep0));
else
b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, (uint) nowPos64, prevByte);
m_OutWindow.PutByte(b);
state.UpdateChar();
nowPos64++;
}
else
{
uint len;
if (m_IsRepDecoders[state.Index].Decode(m_RangeDecoder) == 1)
{
if (m_IsRepG0Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
if (
m_IsRep0LongDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(
m_RangeDecoder) == 0)
{
state.UpdateShortRep();
m_OutWindow.PutByte(m_OutWindow.GetByte(rep0));
nowPos64++;
continue;
}
}
else
{
UInt32 distance;
if (m_IsRepG1Decoders[state.Index].Decode(m_RangeDecoder) == 0)
{
distance = rep1;
}
else
{
if (m_IsRepG2Decoders[state.Index].Decode(m_RangeDecoder) == 0)
distance = rep2;
else
{
distance = rep3;
rep3 = rep2;
}
rep2 = rep1;
}
rep1 = rep0;
rep0 = distance;
}
len = m_RepLenDecoder.Decode(m_RangeDecoder, posState) + Base.kMatchMinLen;
state.UpdateRep();
}
else
{
rep3 = rep2;
rep2 = rep1;
rep1 = rep0;
len = Base.kMatchMinLen + m_LenDecoder.Decode(m_RangeDecoder, posState);
state.UpdateMatch();
uint posSlot = m_PosSlotDecoder[Base.GetLenToPosState(len)].Decode(m_RangeDecoder);
if (posSlot >= Base.kStartPosModelIndex)
{
var numDirectBits = (int) ((posSlot >> 1) - 1);
rep0 = ((2 | (posSlot & 1)) << numDirectBits);
if (posSlot < Base.kEndPosModelIndex)
rep0 += BitTreeDecoder.ReverseDecode(m_PosDecoders,
rep0 - posSlot - 1, m_RangeDecoder,
numDirectBits);
else
{
rep0 += (m_RangeDecoder.DecodeDirectBits(
numDirectBits - Base.kNumAlignBits) << Base.kNumAlignBits);
rep0 += m_PosAlignDecoder.ReverseDecode(m_RangeDecoder);
}
}
else
rep0 = posSlot;
}
if (rep0 >= m_OutWindow.TrainSize + nowPos64 || rep0 >= m_DictionarySizeCheck)
{
if (rep0 == 0xFFFFFFFF)
break;
throw new DataErrorException();
}
m_OutWindow.CopyBlock(rep0, len);
nowPos64 += len;
}
}
}
m_OutWindow.Flush();
m_OutWindow.ReleaseStream();
m_RangeDecoder.ReleaseStream();
}
