Dave at 20:23, 25 January 2006

2006-01-25T20:23:36Z

New page

In this document I will share what I have found about reverse engineering the "CD Info.cidb" file format specification.<br>
The original info came from [http://groups.google.com/group/comp.sys.mac.programmer.help/browse_thread/thread/439d3db93fd1451/2d37f4663e2cecb2?lnk=st&q=cd+info.cidb&rnum=5&fwc=1 comp.sys.mac.programmer.help]

63696462 \\ 1st 4 bytes = file type "cidb"
00000014 \\ next 4 bytes = unidentified numeric "20" version maybe?
00002868 \\ total file size
00010000 \\ next 4 bytes = unidentified numeric "65536"
00002814 \\ size of record portion of file (total - indx size)
616C626D \\ label of first record "albm"
00000C00 \\ number of bytes from albm to albm "3072" (ie this is the
\\ total record length)
00000A3A \\ length of 1st record in bytes "2618" (ie this is the actual
\\ part of the above which is in use)
616E616D \\ field label "anam"
00000042 \\ "66" length of the anam section in bytes, including the anam
\\ header
001c \\ length of field in characters "28"
\\ next 56 bytes are the 28 charaters of the field stored in 2
\\ byte/character format (unicode?)
61757468 \\ field label "auth"
00000028 \\ "40" length of the auth section in bytes, including the auth
\\ header
000F \\ field length in characters "15"
\\ next 30 bytes is field data
676E7265 \\ field label "gnre"
00000018 \\ "24" length of the gnre section in bytes, including the gnre
\\ header
0007 \\ length of field in characters "7"
\\ next 14 bytes is field data, 2byte/char
79656172 \\ field label "year"
0000000C \\ "12"
\\ next 4 bytes are the year
6D656964 \\ field label "meid"
0000004A \\ "74" length of the meid section in bytes, including the meid
\\ header
\\ next 66 bytes are field data, some sort of identification
\\ numer i think
\\ always of the form <space>then 32-character
\\ number in 2-byte/char format
6D756964 \\ field label "muid"
00000018 \\ "24" length of the muid section in bytes, including the muid
\\ header
0007 \\ length of field in characters "7"
\\ next 14 bytes are the 7 digit number, 2-bytes/char
\\ a little googling seems to indicate this is the cd's Muze-ID
70726F67 \\ field label "prog"
0000001c \\ "28" length of the prog section in bytes, including the prog
\\ header
\\ next 20 bytes are a play order list for the 10 tracks on
\\ this disc
7472616B \\ field label "trak"
000000FE \\ "254" length of the trak section in bytes, including the
\\ trak header
00000001 \\ track number
746E616D \\ field label "tnam"
00000040 \\ "64" length of the tnam section in bytes, including the tnam
\\ header
001B \\ length of field in characters "27"
\\ next 54 bytes is field data
616E616D \\ field label "anam"
00000042 \\ "66" section length in bytes get the idea?
001c \\ length of field in characters "28"
\\ next 56 bytes are the 28 charaters of the field stored in
\\ 2 byte/character format (unicode?)
61757468 \\ field label "auth"
00000028 \\ "40" section length in bytes get the idea?
000F \\ field length in characters "15"
\\ next 30 bytes is field data
676E7265 \\ field label "gnre"
00000018 \\ "24" section length in bytes get the idea?
0007 \\ length of field in characters "7"
\\ next 14 bytes is field data, 2byte/char
766F6C6D \\ field label "volm"
0000000C \\ "12" section length in bytes get the idea?
\\ next 4 bytes are custom volume level info for playback
79656172 \\ field label "year"
0000000C \\ "12" section length in bytes get the idea?
\\ next 4 bytes are the year
73747274 \\ field label "strt"
0000000C \\ "12" section length in bytes get the idea?
\\ next 4 bytes are custom start of track info
73746F70 \\ field label "stop"
0000000C \\ "12" section length in bytes get the idea?
\\ next 4 bytes are custom end of track info
\\ Following this, the rest of the cd tracks are included, in
\\ the same format
\\
\\ After the last track, there is an amount of blank space
\\ (total record minus used portion of record), and the next
\\ record in the database follows, starting with the "albm"
\\ label
\\ following the record portion of the file, is a segement
\\ labelled "indx"
696E6478 \\ indx
\\ next 4 bytes are the length of the indx in bytes
\\ next 4 bytes are the total number of records (ie the number
\\ of cds)
\\ so far i haven't been able to make any other useful
\\ determinations about the index section

CD Info.cidb - Revision history

Dave at 20:23, 25 January 2006