diff --git a/doc/cookbook.txt b/doc/cookbook.txt index 7cd4760..e4a5e24 100644 --- a/doc/cookbook.txt +++ b/doc/cookbook.txt @@ -669,5 +669,97 @@ of Intermediate state by 5Bh CLOSE TRACK SESSION with Close Function 010b. (mmc5r03c.pdf 6.3.3.2.3) +------------------------------------------------------------------------------- + Sequential DVD-R[W] Cookbook + (emerging, still incomplete) +------------------------------------------------------------------------------- +Inspired by Andy Polyakov's http://fy.chalmers.se/~appro/linux/DVD+RW/tools , +backed by reading mmc5r03c.pdf from http://www.t10.org/ftp/t10/drafts/mmc5/ +and by experiments with drives NEC ND-4570A and LG GSA-4082B. + +For libburnia.pykix.org by Thomas Schmitt + +------------------------------------------------------------------------------- + +Media type can be recognized by Current Profile from 46h GET CONFIGURATION. +(mmc5r03c.pdf 6.6.2.1) +DVD-RW Restricted Overwrite 0013h +DVD-RW Sequential Recording 0014h + +------------------------------------------------------------------------------- +Incremental writing : + +There are two approaches for writing to sequential DVD-RW. DAO and Incremental. + +Incremental writing allows to produce multi-session DVDs. It is indicated +by feature 0021h being marked current in the reply of 46h GET CONFIGURATION. +growisofs inquires 0021h by setting Starting Feature Number to 0x21 and +Allocation Length to 16 in order to get only this one. The feature descriptor +begins at byte 8 of the reply. Its availability is indicated by the Current +Bit. libburn obtains the full feature list for this and other info. +(mmc5r03c.pdf 5.2.2. Feature Descriptor format, 5.3.11 Feature 0021h, + 6.2 46h GET CONFIGURATION, ) +In mode page 05h this method is selected by Write Type 00h. + +>>> speed setting + +growisofs fetches a mode page 05h template by MODE SENSE and inserts its own +parameters. It sets Multi-session to 11b, unless dvd_compat is nonzero. +libburn composes its mode page 05h from zero and allows control of +Multi-Session by the application. + BUFE Buffer Underrun protection 0=off, 1=on + LS_V Link size valid 1=true + Test Write -dummy mode for writing 0=off, 1=on + Write Type Packet/TAO/SAO/RAW 00h = Incremental (Packet) + Multi-session Wether to keep appendable 00b = finalize(growisofs DAO) + 11b = keep appendable + Track Mode Describes frame type 5 [*1] + Data Block Type Layout of payload blocks 8 [*2] + Link Size ??? 16 [*3] + FP Fixed Packet Size Bit 1 + Packet Size 16 [*4] +(mmc5r03c.pdf 7.5.4 The Mode Page, 4.2.3.4 Table 17 CONTROL = Track Mode) +(spc3r23.pdf 6.8 MODE SELECT, 7.4.3 Mode parameter header formats) +[*1:] +growisofs takes the Track Mode from 52h READ TRACK INFORMATION, Address/Number +Type 1, Track 1, Track Information Block byte 5 & 0xf. +(mmc5r03.pdf 6.27) +The specs predict that this will be Track Mode 4 (6.27.3.8) and also state that +default is 5 (7.5.4.12). 4 means: uninterrupted, do not copy. 5 means +increment, do not copy. +[*2:] +8 means: 2048 byte data blocks. growisofs sets this value if Data Mode from +above 52h READ TRACK INFORMATION is 1 or Fh, which is predicted by the specs +to be always true. +(mmc5r03.pdf 6.27.3.10) +[*3:] +growisofs (transport.hxx) sets Link Size to 16 for profiles 0011h and 0014h. +libburn now records the first link size from feature 0021h in its burn_drive +structure. If another link size item is 16, then 16 is used. +[*4:] +growisofs takes Packet Size from 52h. Specs predict it will be 16 (= 32 kB). +(mmc5r03.pdf 7.5.4.16) + +The writing process is much like in "Writing a session to CD in TAO mode" : +Next Writeable Address is fetched from the reply of 52h READ TRACK INFORMATION. +Currently full 32 kB buffers get written via 2Ah WRITE. +When writing is done, it is mandatory to force the drive's buffer to media by +35h SYNCHRONIZE CACHE. +(mmc5r03c.pdf, 6.41) + +The track has to be closed by 5Bh CLOSE TRACK SESSION Close Function 001b. +growisofs uses the logical track number for that and not FFh like libburn +does with TAO CD. So libburn obtains the Last Track Number in Last Session +from the reply of 51h READ DISC INFORMATION requesting Data Type 000b +"Standard Disc Information". +(mmc5r03c.pdf 6.3.3.2.2 CLOSE TRACK, 6.22.3.1.) +Afterwards 5Bh CLOSE TRACK SESSION Close Function 010b with Logical Track +Number 0 closes the session. It depends on the Multi-Session value in mode +page 05h wether the disc is finalized or stays appendable. +(mmc5r03c.pdf 6.3.3.2.3) + +It has not been tested yet wether multiple tracks are permissible in a single +session. + -------------------------------------------------------------------------------