[vorbis-dev] audio/vorbis media type registration

[Monty]

> >> Magic number(s): For vorbis files wrapped inside OggSQUISH
> >> files, the first four bytes are 0x4f 0x67
> >> 0x67 0x53 corresponding to the string "OggS".
> >> The vorbis header will then additionally
> >> contain the lowercase string "vorbis"
> >> (comprising the bytes 0x76 0x6f 0x72 0x62
> >> 0x69 0x73) at offset 0x1d, where offset 0x00
> >> is the first byte of the file.
> > 
> > I'm not sure if the "vorbis" header will always be at that location, although
> > it seems right, yes.  Monty?
> > 
> 
> If there is more than one ogg stream, the header could be in
> other locations.

Right now, (due to laziness..erm... 'maximizing application of limited
resources'), Vorbis I is specced to use the degenerate Ogg stream
case.  This 'degenerate' form does not contain a master Ogg TOC and
only contains one media stream (in this case Vorbis, thus the first
page is a vorbis header).

For the degenerate case, the magic described above is certain to be correct.

Monty

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