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Re: [Libcdio-devel] CD-Text patches

From: Leon Merten Lohse
Subject: Re: [Libcdio-devel] CD-Text patches
Date: Tue, 6 Dec 2011 23:09:32 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Dec 06, 2011 at 10:52:24PM +0100, Thomas Schmitt wrote:
> Hi,
> > I work on a documentation about CDTEXT for libcdio. It will include the
> > use of those fields and some more stuff I learned.
> My own emerging documentation can be viewed here:
>   Search "Format of CD-TEXT packs:"

We should combine them eventually.

> > Download Golden Hawk's CDRWIN.
> I am totally without MS software since the BASIC interpreter of my VIC-20.

Totally support that :-)
I did setup a Win95 VM for that purpose. If I find the time, I create
some more examples.

> > > struct CDText_blocksize
> > Also the lastseq and langcode seem to be redundant since they are
> > present in every block but also contain information about the other
> > blocks.
> Can it be that one group of three packs of type 0x8f describes
> up to 8 blocks ?

Could be. But as far as I know it does not. We will know for sure when we have
a multiblock example.

> I actually meant just the comment. "more than" should be "at least".
> Question is whether there can be more than three packs of type 0x87.
> I would stay with ">= 3" for now.

I will change that. Excuse my not always correct use of the English
language ;)

> The values in appendix 3
> match those of cdtext_private.h:cdtext_lang_enum_s
> The only difference is that there are ~ 100 language codes in tech3264.pdf.
> I wonder where Shona, Zuku, or Kannada are spoken.

Well. The fact that this standard allows 100 languages does not mean
CDTEXT supports all of them. The ones from cdtext.h are the only ones
that are in Sony's CDTEXT example tool.

> Well, at least with there
> is no mentioning of language blocks at all.

Cuesheets do not support multiple blocks. Cdrdao toc file format does.
If you do not plan to support that you could just default it to English.
Most burning tools do that.

> Do you have an example of multi-block CD-TEXT ?

Will make one, tomorrow.

> > Give me a week to finish the doc.
> I'm looking forward to exploiting it.

Good night


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