[vorbis-dev] OGG header

Erik Stenborg d99papa at dtek.chalmers.se
Wed Aug 28 20:34:55 PDT 2002



Late reply:

Some time ago I tried to do the same but got stuck on the CRC calculation.
I would be grateful if I could get some more details on how to calculate
it. The link from the spec is dead and the source uses a look-up-table
which I have no idea how it is constructed or even how to use properly.

Thanks,
Erik

On Sun, 11 Aug 2002, Ralph Giles wrote:

> The underlined bytes are the two most significant bytes of the page 
> sequence number (correct), the 4 bytes of the page CRC (haven't checked) 
> the page_segments field, and the first of the first (of 11, apparently) 
> lacing values in the segment table.
> 
> The operative documentation is:
> 
> 	http://www.xiph.org/ogg/doc/framing.html
> 	http://www.xiph.org/ogg/vorbis/doc/vorbis-spec-ref.html
> and	http://www.xiph.org/ogg/vorbis/doc/v-comment.html
> 
> Hope that helps,
>   -r
> 
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