Updated documentation of CD-TEXT pack types 0x87 and 0x8f
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@ -224,12 +224,8 @@ sync. libburn uses the info provided by 52h READ TRACK INFORMATION.
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-------------------------------------------------------------------------------
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Guided by reading libburn/* from http://icculus.org/burn
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backed by reading mmc5r03c.pdf from http://www.t10.org/ftp/t10/drafts/mmc5/
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by reading mmc3r10g.pdf from http://www.t10.org/ftp/t10/drafts/mmc3/
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by reading source of libcdio from http://www.gnu.org/s/libcdio
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by reading tech3264.pdf from http://tech.ebu.ch/docs/tech/
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and by experiments with drives NEC ND-4570A, LG GSA-4082B, LITE-ON LTR48125S,
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Optiarc BD RW BD-5300S,
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which used in part code from http://icculus.org/burn.
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For libburnia-project.org by Thomas Schmitt <scdbackup@gmx.net>
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@ -410,9 +406,16 @@ Following are text packs of 18 bytes each.
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(mmc5r03c.pdf 6.26.3.7.1 table 495)
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-------------------------------------------------------------------------------
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Guided by Leon Merten Lohse via libcdio-devel@gnu.org
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by reading mmc3r10g.pdf from http://www.t10.org/ftp/t10/drafts/mmc3/
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by reading tech3264.pdf from http://tech.ebu.ch/docs/tech/
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by studying output of cdtext.zip from http://www.sonydadc.com/file/
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by reading source of libcdio from http://www.gnu.org/s/libcdio
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which quotes source of cdrecord from ftp://ftp.berlios.de/pub/cdrecord/alpha
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Format of CD-TEXT packs:
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The format of a text pack is explained in (mmc3r10g.pdf, appendix J).
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The format of a text pack is explained in (mmc3r10g.pdf, Annex J).
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Each pack consists of a 4-bytes are header, 12 byte of payload, and 2 bytes
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of CRC.
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@ -455,15 +458,67 @@ The CRC algorithm uses divisor 0x11021 and is known as CRC-16-CCITT.
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MMC-3 says: "All bits shall be inverted."
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The text packs are grouped in up to 8 blocks of at most 256 packs. Each block
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is in charge for one language. Sequence numbers of each block are counted
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separately. All packs of block 0 come before the packs of block 1.
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The limitation of block number and sequence numbers imply that there are at
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most 2048 text packs possible. (READ TOC/PMS/ATIP could retrieve 3640 packs,
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as it is limited to 64 kB - 2.)
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The known information about the meaning of the pack payload is incomplete.
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Pack types 0x80 to 0x85 and 0x8e contain 0-terminated cleartext.
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Unclear yet: 0x86 = Disc Identification
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Type 0x87 seems to contain 2 binary bytes and 10 bytes of 0-terminated
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cleartext.
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The two binary bytes may or may not be repeated at the start of each pack.
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They form a big-endian index to the following list (from libcdio source, which
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learned it from cdrecord source, stating "Genre codes from Enhanced CD
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Specification page 21").
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0x0000 = "Not Used"
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0x0001 = "Not Defined"
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0x0002 = "Adult Contemporary"
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0x0003 = "Alternative Rock"
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0x0004 = "Childrens Music"
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0x0005 = "Classical"
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0x0006 = "Contemporary Christian"
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0x0007 = "Country"
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0x0008 = "Dance"
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0x0009 = "Easy Listening"
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0x000a = "Erotic"
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0x000b = "Folk"
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0x000c = "Gospel"
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0x000d = "Hip Hop"
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0x000e = "Jazz"
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0x000f = "Latin"
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0x0010 = "Musical"
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0x0011 = "New Age"
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0x0012 = "Opera"
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0x0013 = "Operetta"
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0x0014 = "Pop Music"
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0x0015 = "Rap"
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0x0016 = "Reggae"
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0x0017 = "Rock Music"
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0x0018 = "Rhythm & Blues"
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0x0019 = "Sound Effects"
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0x001a = "Spoken Word"
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0x001b = "World Music"
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The meaning of the cleartext part is yet unclear. Probably it shall give
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a more specific description of the genre.
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Type 0x8f summarizes the whole list of text packs. (Learned from libcdio.)
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The payload bytes of three packs form a 36 byte record.
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Unclear yet: 0x88 = Table of Content information
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Unclear yet: 0x89 = Second Table of Content information
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Type 0x8f summarizes the whole list of text packs of a block.
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So there is one group of three 0x8f packs per block.
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Nevertheless each 0x8f group tells the highest sequence number and the
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language code of all blocks.
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The payload bytes of three 0x8f packs form a 36 byte record.
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Byte :
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0 : Character code:
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0x00 = ISO-8859-1
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@ -475,6 +530,7 @@ The payload bytes of three packs form a 36 byte record.
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1 : Number of first track
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2 : Number of last track
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3 : libcdio source states: "cd-text information copyright byte"
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Probably 3 means "copyrighted", 0 means "not copyrighted".
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4 - 19 : Pack count of the various types 0x80 to 0x8f.
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Byte number N tells the count of packs of type 0x80 + (N - 4).
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I.e. the first byte in this field of 16 counts packs of type 0x80.
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@ -524,7 +580,7 @@ The payload bytes of three packs form a 36 byte record.
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0x29 = Turkish
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0x2a = Flemish
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0x2b = Wallon
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0x45 = Zuku
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0x45 = Zulu
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0x46 = Vietnamese
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0x47 = Uzbek
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0x48 = Urdu
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@ -571,7 +627,7 @@ The payload bytes of three packs form a 36 byte record.
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0x72 = Fulani
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0x73 = Dari
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0x74 = Churash
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0x75 = Chines
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0x75 = Chinese
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0x76 = Burmese
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0x77 = Bulgarian
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0x78 = Bengali
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@ -581,7 +637,7 @@ The payload bytes of three packs form a 36 byte record.
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0x7c = Assamese
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0x7d = Armenian
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0x7e = Arabic
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0x7e = Amharic
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0x7f = Amharic
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E.g. these three packs
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42 : 8f 00 2a 00 01 01 03 00 06 05 04 05 07 06 01 02 48 65
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@ -592,7 +648,7 @@ Byte :Value Meaning
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0 : 01 = ASCII 7-bit
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1 : 01 = first track is 1
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2 : 03 = last track is 3
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3 : 00 = copyright (>>> what does this mean ?)
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3 : 00 = copyright (0 = public domain, 3 = copyrighted ?)
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4 : 06 = 6 packs of type 0x80
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5 : 05 = 5 packs of type 0x81
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6 : 04 = 4 packs of type 0x82
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@ -608,9 +664,9 @@ Byte :Value Meaning
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19 : 03 = 3 packs of type 0x8f
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20 : 2c = last sequence for block 0
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This matches the sequence number of the last text pack (0x2c = 44)
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21 : 00 00 00 00 00 00 00 = last sequence for block 1..7 (none)
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21 : 00 00 00 00 00 00 00 = last sequence numbers for block 1..7 (none)
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28 : 09 = language code for block 0: English
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29 : 00 00 00 00 00 00 00 = language code for block 1..7 (none)
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29 : 00 00 00 00 00 00 00 = language codes for block 1..7 (none)
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----------------------------------------------------------------------------
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What is known about mixed mode sessions :
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