public Atom(FileAccessor input) throws IOException {
offset = input.getFilePointer();
// get atom size
size = input.readInt();
// get atom type
byte[] atomTypeFCC = new byte[4];
input.readFully(atomTypeFCC);
type = new String(atomTypeFCC);
if (size == 1) {
// 64 bit size. Read new size from body and store it
size = input.readLong();
}
// skip back to atom start
input.seek(offset);
}
public void fillBuffer(FileAccessor input) throws IOException {
buffer = new byte[(int) size];
input.readFully(buffer);
}