private Int32 GetSymbol(BitReaderB reader)
{
Int32 code = 0, len = 0;
Int32 p = T - 1; // start at root
while (mTree[p].L != -1)
{
Int32 bit = reader.Next(1);
if (bit == -1)
{
return(-1);
}
p = (bit == 0) ? mTree[p].L : mTree[p].R;
code <<= 1;
code += bit;
len++;
}
return(mTree[p].R);
}
private Int32 GetPosition(BitReaderB reader)
{
switch (reader.Next(4))
{
case 0: return(0x000 | reader.Next(5));
case 1: return(0x020 | reader.Next(5));
case 2: return(0x040 | reader.Next(6));
case 3: return(0x080 | reader.Next(6));
case 4: return(0x0c0 | reader.Next(6));
case 5: return(0x100 | reader.Next(7));
case 6: return(0x180 | reader.Next(7));
case 7: return(0x200 | reader.Next(7));
case 8: return(0x280 | reader.Next(7));
case 9: return(0x300 | reader.Next(8));
case 10: return(0x400 | reader.Next(8));
case 11: return(0x500 | reader.Next(8));
case 12: return(0x600 | reader.Next(9));
case 13: return(0x800 | reader.Next(9));
case 14: return(0xa00 | reader.Next(9));
case 15: return(0xc00 | reader.Next(10));
}
return(-1);
}
