3rd attempt Hello hello,
working on my current project, an audio cd analyzer, I noticed, that libcdio's cd-text extraction does not give me the expected results. After reading through the source code an the equivalent part in cdda2wav, I wrote a small patch for libcdio's cdtext.c: http://nopaste.yamagi.org/?509 adding isrc and mcn extraction from cd-text. should also work more reliable now, when binary fields are present. work on double-byte characters. Currently only block 0 out of 0-7 is read. Is that intended? Are there any audio CDs using more than block 0? If so, we should add a way to read them. I could not find any information on the data format for binary cd-text fields. Does anybody know more? Would be neat to also extract those information. Concerning double-byte characters: Should we leave it to the user to work with that or should the library convert it to a standard like encoding utf8? Either way, it lacks a field in cdtext_t indicating double-byte characters or the encoding. I was also wondering why the cdtext functions do not have a cdio_ prefix. Oh. And I found a little bug in the cdtext example code in the line: const cdtext_t *cdtext = cdio_get_cdtext(p_cdio, 0); I think the 0 should be substituted with i_track. Regards Leon Lohse 03-27-2011: I just found some other issues. cdio_get_cdtext even returns a cdtext_t object, if there is no cdtext information available. The documentation says, it would return NULL in that case. Would be kind of nice to get that fixed. I started to work on proper GENRE and DISC_ID field extraction today. Might take a while though, because the documentation on the internet is very thin and even inconsistent in the case if DISC_ID is binary or char. I am also not at home right now, so I do not have access to very many test CDs. I also intend to implement extraction of the other 7 blocks and relate them to their languages. Dunno how to do that, without breaking the API at this point. Have to think about it a little more. If anybody has information about CD-Text specifications and use other from MMC3 draft, I would really appreciate to see them. Thanks! Leon _______________________________________________ Libcdio-help mailing list [email protected] http://lists.gnu.org/mailman/listinfo/libcdio-help
