if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
validate!(ainfo.get_block_len() > 16);
self.block_len = ainfo.get_block_len();
if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
validate!(ainfo.get_block_len() > 16);
self.block_len = ainfo.get_block_len();