set last page flag on opus in case something wants that

scripts/extract_ktsl2stbin_opus.py

@@ -14,9 +14,11 @@ def crc32ogg(seq):
     return crc
 
 
-def paginate(sequence: int, content: bytes):
+def paginate(sequence: int, is_last: bool, content: bytes):
     # Version, flags, position, serial number, sequence number, checksum, segments, segment table
     flags = 2 if sequence == 0 else 0
+    if is_last:
+        flags |= 4
     page = bytearray(
         b"OggS"
         + struct.pack(
@@ -27,8 +29,6 @@ def paginate(sequence: int, content: bytes):
         + content
     )
     struct.pack_into("<I", page, 22, crc32ogg(page))
-    if sequence == 0:
-        print(page)
     return page
 
 
@@ -64,17 +64,20 @@ def write_opus(ktss: bytes, filename: pathlib.Path):
         + channel_mapping
     )
     # Channel mapping is apparently incorrect for 6 channels but I don't care
-    out.write(paginate(0, opus_header))
+    out.write(paginate(0, False, opus_header))
 
     comment_header = b"OpusTags\4\0\0\0ktss\0\0\0\0\0\0\0\0"
-    out.write(paginate(1, comment_header))
+    out.write(paginate(1, False, comment_header))
 
     # Weird length encoding here, not opus standard
     sequence = 2
     offset = start_offset
     while offset < len(ktss):
         (packet_len,) = struct.unpack(">I", ktss[offset : offset + 4])
-        out.write(paginate(sequence, ktss[offset + 8 : offset + 8 + packet_len]))
+        is_last = offset + 8 + packet_len >= len(ktss)
+        out.write(
+            paginate(sequence, is_last, ktss[offset + 8 : offset + 8 + packet_len])
+        )
 
         offset += packet_len + 8
         sequence += 1