I'm trying to use libFLAC++ v1.1.2, to read Song information (like artist,
trackname etc..). So..
I read metadata from file
FLAC::Metadata::get_streaminfo("somefile.flac", infosik);
and It's ok - no error, then I read vorbis info:
FLAC::Metadata::VorbisComment vorbis_kom(infosik);
int number_of_comments = vorbis_kom.get_num_comments();
and after that I have number_of_comments=14
when I try to read entry using get_comment method I got segfault
vorbis_kom.get_comment(number);
I was trying all numbers from 0, to 14 and it always segfaults
Is that a right way to read those informations? What I'm doing wrong?
--- Emil Nowak <emil5@go2.pl> wrote:> I'm trying to use libFLAC++ v1.1.2, to read Song information (like > artist, > trackname etc..). So.. > > I read metadata from file > FLAC::Metadata::get_streaminfo("somefile.flac", infosik); > and It's ok - no error, then I read vorbis info: > > FLAC::Metadata::VorbisComment vorbis_kom(infosik); > int number_of_comments = vorbis_kom.get_num_comments(); > > and after that I have number_of_comments=14 > when I try to read entry using get_comment method I got segfault > > vorbis_kom.get_comment(number); > > I was trying all numbers from 0, to 14 and it always segfaults > > Is that a right way to read those informations? What I'm doing wrong?the vorbiscomments are not in the streaminfo. you want to do: FLAC::Metadata::VorbisComment tags; if (FLAC::Metadata::get_tags("somefile.flac", tags)) { FLAC::Metadata::VorbisComment::Entry entry tags->get_comment(tags->get_num_comments-1); //e.g. last tag // do something with it... } Josh __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
On 2006-03-09 (Thu) ,at 23:20:50 Josh Coalson wrote:> the vorbiscomments are not in the streaminfo. you want to do: > > FLAC::Metadata::VorbisComment tags; > if (FLAC::Metadata::get_tags("somefile.flac", tags)) { > FLAC::Metadata::VorbisComment::Entry entry > tags->get_comment(tags->get_num_comments-1); //e.g. last tag > // do something with it... > } > > JoshOki, thanks it works. However I still have some questions about all the libflac++. If this is impossible to read vorbis info from StreamInfo why there is constructor for VorbisComment which takes StreamInfo as the only argument? And why the get_num_comments() on this object returns number > 0, if there are no comments? And BTW: Documentation for libflac++ on official site is generated from some old sources, or wrongly generated - You don't have all doxygened informations that is available in headers. Anyway even with this improved documentation (which I have locally) It's hard to get all needed information, many methods are not described, many datatypes are not linked here. I was even using grep on headers, to get some information. And there are so many footnotes like "read C documentation first" that I decided, to do everything in C. It seems to be impossible to use flac++ without learning ordinary libflac. -- Cheers.