private byte[] selectLSE(byte[] jpegheader) throws NoFixException {
if (ByteUtils.bytesBE2ushort(jpegheader, 0) != SOI)
throw new NoFixException("SOI marker is missing");
if (ByteUtils.bytesBE2ushort(jpegheader, 2) != SOF55)
throw new NoFixException("SOI marker is not followed by JPEG-LS SOF marker");
if (ByteUtils.bytesBE2ushort(jpegheader, 4) != 11)
throw new NoFixException("unexpected length of JPEG-LS SOF marker segment");
int marker = ByteUtils.bytesBE2ushort(jpegheader, 15);
if (marker != SOS) {
throw new NoFixException(
marker == LSE
? "contains already LSE marker segment"
: "JPEG-LS SOF marker segment is not followed by SOS marker");
}
switch (bitsStored = jpegheader[6]) {
case 13:
return LSE_13;
case 14:
return LSE_14;
case 15:
return LSE_15;
case 16:
return LSE_16;
}
throw new NoFixException("JPEG-LS " + bitsStored + "-bit");
}
@SuppressWarnings("deprecation")
private void addImplClassUIDReplacements(long pos, int len, int eoffmipos) {
int uidlen = FixJpegLS.this.newImplClassUID.length();
int newlen = (uidlen + 1) & ~1;
if (eoffmipos > 0) {
byte[] newfmilen = new byte[4];
ByteUtils.int2bytesLE(eoffmipos - 144 - len + newlen, newfmilen, 0);
replacements.add(new Replacement(140, 4, newfmilen));
}
byte[] newval = new byte[newlen + 2];
ByteUtils.ushort2bytesLE(newlen, newval, 0);
FixJpegLS.this.newImplClassUID.getBytes(0, uidlen, newval, 2);
replacements.add(new Replacement(pos - 2, len + 2, newval));
}
private void addItemReplacements(long pos, int len, byte[] lse, boolean padded) {
int newlen = len + (padded ? 14 : 15);
replacements.add(
new Replacement(pos - 4, 4, ByteUtils.int2bytesLE((newlen + 1) & ~1, new byte[4], 0)));
replacements.add(new Replacement(pos + 15, 0, lse));
boolean newPadded = (newlen & 1) != 0;
if (newPadded != padded)
replacements.add(
newPadded
? new Replacement(pos + len, 0, PADDING_BYTE)
: new Replacement(pos + len - 1, 1, null));
}
