case 'rmla': // Reference Movie Language Atom
                $atom_structure['version']   = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
                $atom_structure['flags_raw'] = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
                $atom_structure['track_id']  = getid3_lib::BigEndian2Int(substr($atom_data,  4, 2));
                break;