On Mon, Nov 28, 2011 at 11:46 AM, Thomas Schmitt <[email protected]> wrote:
> Hi, > > > Since you are a nice guy, > > ... which compensates for my lack of sysadmin intelligence ... :)) > > > if you want I'll convert these to text and send it to you privately. > > That would be great. > > > > Folks all this back and forth and digging around and realizing this isn't > > exactly in the right kind information or document format is why someone > > should write better documents for CD Text. And if not us (where this > issue > > has been coming up), then by whom? > > I roughly know that for CD writing i would announce the Pack data in > the upper two bits of the Data Form byte column of a CD SAO Cue Sheet. > > MMC-5 Table 567 says that with value 11b i can thransmit 4 Packs of > data per frame. Footnote 3 talks of "R-W", whereas the next sentence > under that table talks of "P-W" in Lead-in: > "When this Data Form of Sub-channel is selected, along with 01h > Data Form of Main Data, this indicates that there is an attempt > to write Raw P-W Sub-channel data in the Lead-in. Absolute Time > field should be set with the start address of the Lead-in, [...]" > Main Data Form 01h is a CD-DA frame with no payload data. (MMC-5 Table 562) > > MMC-5 Table 555 gives an example of a CUE SHEET. Three rows have Data > Form C0h, which would be Pack Data combined with Main Data Form 0 > = CD-DA payload frame. > MMC-5 Figure 128 says that the 96 bytes of Pack Data would be appended > to the CD-DA payload data of the frames. > > So my knowledge gap seems to be with the format of Pack Data > ... although in the light of my own summary, MMC-3 appendix J might > really fill it now. > But i am still clueless about "R-W" sub channel and "P-W" sub channel. > > > Maybe i should again study the code in the dungeon dimensions of > libburn, whether there are more hints about sub channel. > And the CD Device Model paragraphs of MMC-1 to MMC-6. > Each skimming yields a bit more of insight. > > Still i could need an example CD which is known to deliver CD-Text > to CD music players. Its ingredients and a recipe for cooking it > by a free burn program would help a lot. > It is my hope that the files Leon recently contributed in libcdio's test/data/cdtext.* should go a good ways towards filling this gap. At present there may be some problems with the files, but I'm optimistic that eventually we'll get those problems sorted out. > > Have a nice day :) > > Thomas > > >
