if let Some(ref edata) = info.get_extradata() {
validate!(edata.len() == 0x330);
let unp_size = read_u32le(&edata[800..])? as usize;
if let Some(ref edata) = info.get_extradata() {
validate!(edata.len() == 0x330);
let unp_size = read_u32le(&edata[800..])? as usize;