public static void Huff(Stream sin, Stream sout, UpdateCRC callback)
{
Tree t = new Tree ();
int rd, i, tmp;
Stack<int> ret;
BitIO bw = new BitIO (sout, true);
while ((rd = sin.ReadByte ()) != -1) {
tmp = rd;
callback ((byte)tmp);
if (!t.contains (rd)) {
ret = t.GetCode (257);
while (ret.Count > 0)
bw.WriteBit (ret.Pop ());
for (i = 0; i < 8; i++) {
bw.WriteBit ((int)(rd & 0x80));
rd <<= 1;
}
t.UpdateTree (tmp);
}
else {
ret = t.GetCode (tmp);
while (ret.Count > 0)
bw.WriteBit (ret.Pop ());
t.UpdateTree (tmp);
}
}
ret = t.GetCode (256);
while (ret.Count > 0) {
bw.WriteBit (ret.Pop ());
}
}
public static void UnHuff(Stream InStream, Stream OutStream, UpdateCRC callback)
{
int i = 0, count = 0, sym;
Tree t = new Tree ();
BitIO bitIO = new BitIO (InStream, false);
while ((i = bitIO.ReadBit ()) != 2) {
if ((sym = t.DecodeBinary (i)) != Tree.CharIsEof) {
OutStream.WriteByte ((byte)sym);
callback (sym);
count++;
}
}
}
