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Re: [Libcdio-devel] CD-Text patches
From: |
Thomas Schmitt |
Subject: |
Re: [Libcdio-devel] CD-Text patches |
Date: |
Wed, 07 Dec 2011 13:19:13 +0100 |
Hi,
> > http://tech.ebu.ch/docs/tech/tech3264.pdf Appendix 3
> Those two-character language codes have nothing to do with the
> CDTEXT spec.
On the risk to appear stubborn: the list has single character codes.
E.g. 0x08 = German, 0x09 = English, 0x56 = Russian, 0x75 = Chinese.
So it cannot be totally unrelated to the CDIO_CDTEXT_LANG_ macros of
libcdio.
> The spec is pretty specific about that. Some fields (DISC ID) only accept
> plain ASCII, some (ISRC, GENRE INFORMATION) must accept ISO 8859-1.
Is that spec public ?
> Be aware that the spec requires you to set a field for every track, if you
> specify it for one.
Yes. This is already written in my cookbook.
I will have to fill in default values if a track lacks of a pack
for a combination of block and pack type in the overall session.
The libburn model for now looks like this:
burn_session --- 1:1 --- burn_cd_text[8]
| unsigned char character_code
| unsigned char copyright
1:n unsigned char language[8]
|
|
burn_track ----- 1:1 --- burn_cd_text[8]
burn_cdtext consists of:
unsigned char *payload[16]; /* one for each pack type 0x80 to 0x8f */
int length[16]; /* one for each pack type */
int flags; /* bit0-bit15= Double Byte bits */
This is simple but a bit wasteful. 100 tracks on 64-bit Linux occupy
20 kB of empty burn_cd_text objects. But on the other hand i do not
have to handle a dozen pack types by individual variable names.
The interpreter which converts above graph into a set of packs
will of course have to take into respect certain type peculiarities.
Finally it will generate 3 packs of type 0x8f.
(Hmm. I could reduce [16] to [15], actually.)
A pack type P for block B will be generated if the session has a non-NULL
pointer burn_cd_text[B] and if burn_cd_text[B]->payload[P] is not NULL.
If the pack type is track specific, then packs will be generated for
each single track, too.
Have a nice day :)
Thomas
- Re: [Libcdio-devel] CD-Text patches, (continued)
- Re: [Libcdio-devel] CD-Text patches, Leon Merten Lohse, 2011/12/01
- Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/02
- Re: [Libcdio-devel] CD-Text patches, Leon Merten Lohse, 2011/12/02
- Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/02
- Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/06
- Re: [Libcdio-devel] CD-Text patches, Leon Merten Lohse, 2011/12/06
- Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/06
- Re: [Libcdio-devel] CD-Text patches, Leon Merten Lohse, 2011/12/06
- Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/07
- Re: [Libcdio-devel] CD-Text patches, Leon Merten Lohse, 2011/12/07
- Re: [Libcdio-devel] CD-Text patches,
Thomas Schmitt <=
- Re: [Libcdio-devel] CD-Text patches, Rocky Bernstein, 2011/12/06
Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/02
Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/08
Re: [Libcdio-devel] CD-Text patches, Thomas Schmitt, 2011/12/25