protected void unpackFrameData(byte[] bytes) throws InvalidDataException {
ByteBuffer bb = ByteBuffer.wrap(bytes);
id = ByteBufferUtils.extractNullTerminatedString(bb);
byte flags = bb.get();
if ((flags & 0x01) == 0x01) {
isRoot = true;
}
if ((flags & 0x02) == 0x02) {
isOrdered = true;
}
int childCount = bb.get(); // TODO: 0xFF -> int = 255; byte = -128;
children = new String[childCount];
for (int i = 0; i < childCount; i++) {
children[i] = ByteBufferUtils.extractNullTerminatedString(bb);
}
for (int offset = bb.position(); offset < bytes.length; ) {
ID3v2Frame frame = new ID3v2Frame(bytes, offset);
offset += frame.getLength();
subframes.add(frame);
}
}
@Override
protected int getLength() {
int length = 3;
if (id != null) length += id.length();
if (children != null) {
length += children.length;
for (String child : children) {
length += child.length();
}
}
if (subframes != null) {
for (ID3v2Frame frame : subframes) {
length += frame.getLength();
}
}
return length;
}
protected byte[] packFrameData() {
ByteBuffer bb = ByteBuffer.allocate(getLength());
bb.put(id.getBytes());
bb.put((byte) 0);
bb.put(getFlags());
bb.put((byte) children.length);
for (String child : children) {
bb.put(child.getBytes());
bb.put((byte) 0);
}
for (ID3v2Frame frame : subframes) {
try {
bb.put(frame.toBytes());
} catch (NotSupportedException e) {
e.printStackTrace();
}
}
return bb.array();
}