flac dev - Dec 2006 - newbie questions

I wish to add flac support to my Windows audio player so
I wanted to ask a few questions.

I rely on another lib for decoding/playing flac audio files so all I need to

explicitly add support for is reading/writing flac metadata.

1st: I've downloaded libflac and have begun browsing. Is there a simple way
to 
identify and carve out the pieces needed only for metadata i/o? Or will I
have to figure
that out myself? The point is I don't want to build in the entire flac lib
when all
I'm using is the metadata i/o pieces.

2nd: I've been looking for specs on flac metadata standards for "tag
info"
like
Artist, Genre, title etc. I am unable to locate anything on this. I've
dl'ed
some
sample .flac files and find little help there. Only thing I've found so far
is
I created flac "tags" with MediaMonkey on a .flac file and examine
them. It
appears
MediaMonkey is writing the "tags" similiarly to the ogg/vorbis
"standard",
i.e.

    comment[0]: TITLE=title name
    comment[1]: ARTIST=Artist name flac 1
    comment[2]: ENSEMBLE=Artist name flac 1
    comment[3]: ALBUM ARTIST=Artist name flac 1
    comment[4]: ALBUM=Album Name flac 1
    comment[5]: GENRE=Genre name
    comment[6]: COMMENT=comment1
    comment[7]: ENSEMBLE=Artist name flac 1
    comment[8]: TRACKNUMBER=1
    comment[9]: DATE    comment[10]: DESCRIPTION=desc1

Is this "the standard"? Is "the standard" documented
anywhere?

Any advice is appreciated.

Thanks,
Mike

On Sat, Dec 23, 2006 at 05:59:59PM -0600, Mike M wrote:
> 2nd: I've been looking for specs on flac metadata standards for
"tag info"
> [...]
> MediaMonkey is writing the "tags" similiarly to the ogg/vorbis
"standard",
That's correct. FLAC uses the same tag set (and format, roughly) as the 
the vorbis set. The "official" set is documented here:

  http://xiph.org/vorbis/doc/v-comment.html

if those don't do it for you (it's enough for pop, not classical)
there are some more complete collections:

  http://reactor-core.ogg/ogg-tagging.html
  http://www.ghophernet.org/articles/vorbiscomment/

(for example)

HTH,
 -r

One thing I would suggest is that in addition to supporting the
proper flac metadata tags, you support id3 tags.  This isn't
explicitly legal but it works with many players and some of us have
non-trivial numbers of such files (because we're silly).

thanks
danno

On Sat, Dec 23, 2006 at 05:59:59PM -0600, Mike M wrote:
> I wish to add flac support to my Windows audio player so
> I wanted to ask a few questions.
> 
> I rely on another lib for decoding/playing flac audio files so all I need
to
> 
> explicitly add support for is reading/writing flac metadata.
> 
> 1st: I've downloaded libflac and have begun browsing. Is there a simple
way
> to 
> identify and carve out the pieces needed only for metadata i/o? Or will I
> have to figure
> that out myself? The point is I don't want to build in the entire flac
lib
> when all
> I'm using is the metadata i/o pieces.
> 
> 2nd: I've been looking for specs on flac metadata standards for
"tag info"
> like
> Artist, Genre, title etc. I am unable to locate anything on this. I've
dl'ed
> some
> sample .flac files and find little help there. Only thing I've found so
far
> is
> I created flac "tags" with MediaMonkey on a .flac file and
examine them. It
> appears
> MediaMonkey is writing the "tags" similiarly to the ogg/vorbis
"standard",
> i.e.
> 
>     comment[0]: TITLE=title name
>     comment[1]: ARTIST=Artist name flac 1
>     comment[2]: ENSEMBLE=Artist name flac 1
>     comment[3]: ALBUM ARTIST=Artist name flac 1
>     comment[4]: ALBUM=Album Name flac 1
>     comment[5]: GENRE=Genre name
>     comment[6]: COMMENT=comment1
>     comment[7]: ENSEMBLE=Artist name flac 1
>     comment[8]: TRACKNUMBER=1
>     comment[9]: DATE>     comment[10]: DESCRIPTION=desc1
> 
> Is this "the standard"? Is "the standard" documented
anywhere?
> 
> Any advice is appreciated.
> 
> Thanks,
> Mike
> 
> _______________________________________________
> Flac-dev mailing list
> Flac-dev@xiph.org
> http://lists.xiph.org/mailman/listinfo/flac-dev
danno
--
dan pritts
danno@umich.edu
734-929-9770

--- Mike M <flacdev@makuch.org> wrote:
> I wish to add flac support to my Windows audio player so
> I wanted to ask a few questions.
> 
> I rely on another lib for decoding/playing flac audio files so all I
> need to explicitly add support for is reading/writing flac metadata.
> 
> 1st: I've downloaded libflac and have begun browsing. Is there a
> simple way to 
> identify and carve out the pieces needed only for metadata i/o? Or
> will I have to figure
> that out myself? The point is I don't want to build in the entire
> flac lib when all I'm using is the metadata i/o pieces.
is the decoding library using libflac itself?  most do.  if so, no
need to carve up libflac.

if not... libflac has 3 main modules, decoder, encoder, and metadata.
metadata does not depend on the encoder at all.  depending on which
metadata interface you use, it may or may not need the decoder either.
the level 0 interface needs the decoder and the level 2 interface
needs it only for ogg flac, not native flac.

see also http://flac.sourceforge.net/api/group__flac__metadata.html

Josh


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