let streamno = pkt.get_stream().get_id() as usize;
if let Some(ref mut dec) = decs[streamno] {
let frm = dec.decode(&pkt).unwrap();
let streamno = pkt.get_stream().get_id() as usize;
if let Some(ref mut dec) = decs[streamno] {
let frm = dec.decode(&pkt).unwrap();