Vorbis dev - Nov 2003 - Is my understanding accurate?

Hi all!

I'm working on a Java program to read the metadata from Ogg Vorbis
files, which means interpretting the Ogg framing.  I'm hoping that some-
one can take a look at the following page and tell me if the overview
I've written is accurate.

     http://home.comcast.net/~i.pilcher/OggSegment.html

Also, since the documentation doesn't specifically state whether the
fields in the page header should be interpretted as signed or unsigned,
is the following correct:

     absolute granule position

         -1 (0xffffffffffffffff) is used to indicate that no packets
         end on a page, but it's not clear whether, for example,
         0x8000000000000000 should be interpretted as a valid positive
         value.  (I'll be the first to admit that this question is almost
         certainly academic, but it would still be nice to know.)

     stream serial number

         Doesn't matter; just a bit pattern.

     page sequence no

         Unsigned?

     page checksum

         Doesn't matter.

Thanks!

-- 
=======================================================================Ian
Pilcher                                        i.pilcher@comcast.net
=======================================================================
--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to
'vorbis-dev-request@xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is
needed.
Unsubscribe messages sent to the list will be ignored/filtered.

On Monday 24 November 2003 17:56, Ian Pilcher wrote:
> Also, since the documentation doesn't specifically state whether the
> fields in the page header should be interpretted as signed or unsigned,
> is the following correct:
I believe they should be interpreted as unsigned, though I'm not certain. We
should clarify this in the format documentation. 

I doubt you'll encounter any streams where it matters, though - I'm not
sure
what libogg does.

Mike

--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to
'vorbis-dev-request@xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is
needed.
Unsubscribe messages sent to the list will be ignored/filtered.