private static void DecodeInternal(Stream source, Stream destination, ref long decompressedBytes)
{
UInt8_NE_H_InputBitStream bitStream = new UInt8_NE_H_InputBitStream(source);
for (; ;)
{
if (bitStream.Pop())
{
NeutralEndian.Write1(destination, NeutralEndian.Read1(source));
++decompressedBytes;
}
else
{
long count = 0;
long offset = 0;
if (bitStream.Pop())
{
byte high = NeutralEndian.Read1(source);
byte low = NeutralEndian.Read1(source);
count = high & 0x07;
if (count == 0)
{
count = NeutralEndian.Read1(source);
if (count == 0)
{
break;
}
count += 9;
}
else
{
count = 10 - count;
}
offset = ~0x1FFFL | ((0xF8 & high) << 5) | low;
}
else
{
offset = NeutralEndian.Read1(source);
offset |= ~0xFFL;
byte low = Convert.ToByte(bitStream.Pop());
byte high = Convert.ToByte(bitStream.Pop());
count = (low << 1 | high) + 2;
}
for (long i = 0; i < count; i++)
{
long writePosition = destination.Position;
destination.Seek(writePosition + offset, SeekOrigin.Begin);
byte b = NeutralEndian.Read1(destination);
destination.Seek(writePosition, SeekOrigin.Begin);
NeutralEndian.Write1(destination, b);
}
decompressedBytes += count;
}
}
}
public override bool Push(bool bit)
{
this.byteBuffer |= (byte)(Convert.ToByte(bit) << this.waitingBits);
if (++this.waitingBits >= 8)
{
NeutralEndian.Write1(this.stream, this.byteBuffer);
this.waitingBits = 0;
this.byteBuffer = 0;
return(true);
}
return(false);
}
public override bool Flush(bool unchanged)
{
if (this.waitingBits != 0)
{
if (!unchanged)
{
this.byteBuffer <<= 8 - this.waitingBits;
}
NeutralEndian.Write1(this.stream, this.byteBuffer);
this.waitingBits = 0;
return(true);
}
return(false);
}
public override bool Write(byte data, int size)
{
if (this.waitingBits + size >= 8)
{
int delta = 8 - this.waitingBits;
this.waitingBits = (this.waitingBits + size) % 8;
byte bits = (byte)((this.byteBuffer << delta) | (data >> this.waitingBits));
NeutralEndian.Write1(this.stream, bits);
this.byteBuffer = data;
return(true);
}
this.byteBuffer <<= size;
this.byteBuffer |= data;
this.waitingBits += size;
return(false);
}