case 'stco': // Sample Table Chunk Offset atom
                if ($ParseAllPossibleAtoms) {
                    $atom_structure['version']        = getid3_lib::BigEndian2Int(substr($atom_data,  0, 1));
                    $atom_structure['flags_raw']      = getid3_lib::BigEndian2Int(substr($atom_data,  1, 3)); // hardcoded: 0x0000
                    $atom_structure['number_entries'] = getid3_lib::BigEndian2Int(substr($atom_data,  4, 4));