[NUT-devel] vorbis global 3 to 1 header mess

[Rich Felker]

On Tue, Jul 18, 2006 at 11:10:10PM +0200, Michael Niedermayer wrote:
> Hi
> 
> ive looked at the vorbis spec and it seems like its trivial to split the
> 3 header packets if they are simply blindly concatenated
> the first packet has fixed length
> 
> the comment header looks like:
> 
>   1) [vendor_length] = read an unsigned integer of 32 bits
>   2) [vendor_string] = read a UTF-8 vector as [vendor_length] octets
>   3) [user_comment_list_length] = read an unsigned integer of 32 bits
>   4) iterate [user_comment_list_length] times {
>        5) [length] = read an unsigned integer of 32 bits
>        6) this iteration's user comment = read a UTF-8 vector as [length] octets
>      }
>   7) [framing_bit] = read a single bit as boolean
>   8) if ( [framing_bit] unset or end-of-packet ) then ERROR
> 
> an they all have a "vorbis" in front of them ...

excellent, thank you for doing the research to find this.

rich