Updated documentation of CD-TEXT pack types 0x88 and 0x89

1.2.0
Thomas Schmitt 11 years ago
parent 39bdf8c725
commit f594e30f39
  1. 76
      doc/cookbook.txt

@ -430,7 +430,7 @@ The first byte of each pack tells the pack type (text meaning):
0x87 = text-and-binary: Genre Identification
0x88 = binary: Table of Content information
0x89 = binary: Second Table of Content information
(0x8a to 0x8c are reserved. 0x8d is "Reserved for content provider only".)
(0x8a to 0x8c are reserved.)
0x8d = Closed Information
0x8e = UPC/EAN code of the album and ISRC code of each track
0x8f = binary: Size Information of the Block
@ -455,8 +455,9 @@ A text may span over several packs. Unused characters in a pack are used for
the next text of the same pack type. If no text of the same type follows,
then the remaining text bytes are set to 0.
The CRC algorithm uses divisor 0x11021 and is known as CRC-16-CCITT.
MMC-3 says: "All bits shall be inverted."
The CRC algorithm uses divisor 0x11021. The resulting 16-bit residue of the
polynomial division gets exored with 0xffff and written as big-endian
number to bytes 16 and 17 of the pack.
The text packs are grouped in up to 8 blocks of at most 256 packs. Each block
@ -478,12 +479,9 @@ Pack type 0x86 (Disc Identification) is documented by Sony as "Catalog Number:
(use ASCII Code) Catalog Number of the album". So it is not really binary
but might be non-printable.
Type 0x87 seems to contain 2 binary bytes and 10 bytes of 0-terminated
cleartext.
The two binary bytes may or may not be repeated at the start of each pack.
They form a big-endian index to the following list (from libcdio source, which
learned it from cdrecord source, stating "Genre codes from Enhanced CD
Specification page 21").
Type 0x87 contains 2 binary bytes and 10 or 12 bytes of 0-terminated cleartext.
The two binary bytes may or may not be repeated at the start of the follow-up
packs of type 0x87. They form a big-endian index to the following list.
0x0000 = "Not Used"
0x0001 = "Not Defined"
0x0002 = "Adult Contemporary"
@ -512,12 +510,56 @@ Specification page 21").
0x0019 = "Sound Effects"
0x001a = "Spoken Word"
0x001b = "World Music"
Sony documents the cleatext part as "Genre information that would supplement
Sony documents the cleartext part as "Genre information that would supplement
the Genre Code, such as 'USA Rock music in the 60s'".
Unclear yet: 0x88 = Table of Content information
Unclear yet: 0x89 = Second Table of Content information
Pack type 0x88 records information from the CDs Table of Content, as of
READ PMA/TOC/ATIP Format 0010b (mmc5r03c.pdf, table 490 TOC Track Descriptor
Format, Q Sub-channel).
The first pack records in its payload bytes:
0 : PMIN of POINT A1 = First Track Number
1 : PMIN of POINT A2 = Last Track Number
2 : unknown, 0 in Sony example
3 : PMIN of POINT A2 = Start position of Lead-Out
4 : PSEC of POINT A2 = Start position of Lead-Out
5 : PFRAME of POINT A2 = Start position of Lead-Out
6 to 11 : unknown, 0 in Sony example
The following packs record in groups of 3 bytes PMIN, PSEC, PFRAME of the POINT
of the lowest track number to the POINT of the highest track number (max 63h).
The payload of the last pack is padded by 0s.
The Sony .TOC example:
A0 01
A1 14
A2 63:02:18
01 00:02:00
02 04:11:25
03 08:02:50
04 11:47:62
...
13 53:24:25
14 57:03:25
yields
88 00 23 00 01 0e 00 3f 02 12 00 00 00 00 00 00 12 00
88 01 24 00 00 02 00 04 0b 19 08 02 32 0b 2f 3e 67 2d
...
88 0d 27 00 35 18 19 39 03 19 00 00 00 00 00 00 ea af
Pack type 0x89 is yet quite unclear. Especially what the information shall
mean to the user of the CD. The time points in the Sony example are in the
time range of the tracks with the numbers that are given before the time
points:
01 02:41:48 01 02:52:58
06 23:14:25 06 23:29:60
07 28:30:39 07 28:42:30
13 55:13:26 13 55:31:50
yields
89 01 28 00 01 04 00 00 00 00 02 29 30 02 34 3a f3 0c
89 06 29 00 02 04 00 00 00 00 17 0e 19 17 1d 3c 73 92
89 07 2a 00 03 04 00 00 00 00 1c 1e 27 1c 2a 1e 72 20
89 0d 2b 00 04 04 00 00 00 00 37 0d 1a 37 1f 32 0b 62
The track numbers are stored in the track number byte of the packs. The two
time points are stored in byte 6 to 11 of the payload. Byte 0 of the payload
seems to be a sequential counter. Byte 1 always 4 ? Byte 2 to 5 always 0 ?
Type 0x8d is documented by Sony as "Closed Information: (use 8859-1 Code)
Any information can be recorded on disc as memorandum. Information in this
@ -530,15 +572,13 @@ Type 0x8f summarizes the whole list of text packs of a block.
So there is one group of three 0x8f packs per block.
Nevertheless each 0x8f group tells the highest sequence number and the
language code of all blocks.
The payload bytes of three 0x8f packs form a 36 byte record.
The payload bytes of three 0x8f packs form a 36 byte record. The track number
bytes of the three packs have the values 0, 1, 2.
Byte :
0 : Character code:
0x00 = ISO-8859-1
0x01 = 7 bit ASCII
0x80 = Kanji (japanese)
0x81 = Korean
0x82 = Mandarin (chinese)
0xff = libcdio source states: "everything else"
1 : Number of first track
2 : Number of last track
3 : libcdio source states: "cd-text information copyright byte"
@ -548,6 +588,7 @@ The payload bytes of three 0x8f packs form a 36 byte record.
I.e. the first byte in this field of 16 counts packs of type 0x80.
20 - 27 : Highest sequence byte number of blocks 0 to 7.
28 - 36 : Language code for blocks 0 to 7 (tech3264.pdf appendix 3)
Not all of these Codes have ever been seen with CD-TEXT, though.
0x00 = Unknown
0x01 = Albanian
0x02 = Breton
@ -650,7 +691,6 @@ The payload bytes of three 0x8f packs form a 36 byte record.
0x7d = Armenian
0x7e = Arabic
0x7f = Amharic
E.g. these three packs
42 : 8f 00 2a 00 01 01 03 00 06 05 04 05 07 06 01 02 48 65
43 : 8f 01 2b 00 00 00 00 00 00 00 06 03 2c 00 00 00 c0 20

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