encode method
Implementation
List<int> encode(MetadataV2_3Body data) {
int start = 0;
final idBytes = _output.sublist(start, start + 3);
if (iso_8859_1_codec.decode(idBytes) == 'ID3') {
start += 3;
_deepDecode(start, data);
} else {
final insetBytes = _createNewID3Body(data);
_output.insertAll(0, insetBytes);
}
return _output;
}