Re: [Libcdio-devel] CD-Text patches

[Robert William Fuller]

On 11/28/2011 11:46 AM, Thomas Schmitt wrote:
> 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.

I wrote some code for my ripper, cued, that extracts the Q sub channel
from the raw 96 bytes of subchannel pack data.  If you grab cued, the
code that unpacks the Q sub channel is in the files pwsc.h and pwsc.c
(which also use qsc.h and qsc.c.)  I only unpacked Q because it was all
I cared about at the time, but the code should give you some idea of how
to pack it.  The link to cued is https://gna.org/projects/cued/.