private FrameHeader createFrameHeader(char[] source) throws ID3ReaderException {
if (source.length != HEADER_LENGTH) {
throw new ID3ReaderException("Length of header must be " + HEADER_LENGTH);
}
String id = new String(source, 0, FRAME_ID_LENGTH);
int size =
(((int) source[4]) << 24)
| (((int) source[5]) << 16)
| (((int) source[6]) << 8)
| source[7];
if (tagHeader != null && tagHeader.getVersion() >= 0x0400) {
size = unsynchsafe(size);
}
char flags = (char) ((source[8] << 8) | source[9]);
return new FrameHeader(id, size, flags);
}
