Vorbis dev - Sep 2002 - Floor type 0 and residues type 0 and 1

Hi, 

it seems to me as if all vorbis-files only contain floors of type 
1 and residues of type 2. Is it possible to "force" the encoder to 
somehow create a vorbis-file with the other floor and residue types?

Tor

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Easiest way to make a file that uses floor0 would be to use an old encoder
(beta4 or earlier). Just a suggestion if you only want to test if your
decoder can handle those files properly. =)

/Erik

On Tue, 24 Sep 2002, Tor-Einar Jarnbjo wrote:
> Hi, 
> 
> it seems to me as if all vorbis-files only contain floors of type 
> 1 and residues of type 2. Is it possible to "force" the encoder
to
> somehow create a vorbis-file with the other floor and residue types?
> 
> Tor
> 
> 
> 
> 
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At 11:45 AM 9/24/02 +0200, you wrote:
>Hi, 
>
>it seems to me as if all vorbis-files only contain floors of type 
>1 and residues of type 2. Is it possible to "force" the encoder to
>somehow create a vorbis-file with the other floor and residue types?
>
I think the encoder might use res1 or res0 for mono streams (though
I'm not sure). The current encoder is definately incapable of creating
floor0 streams, however - if you want this (presumably for testing a
decoder?), you should grab one of the older (beta1-beta4) releases which
used floor0.

Mike

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Onsdag, 25 september 2002, skrev du:
>I think the encoder might use res1 or res0 for mono streams (though
>I'm not sure). The current encoder is definately incapable of creating
>floor0 streams, however - if you want this (presumably for testing a
>decoder?), you should grab one of the older (beta1-beta4) releases 
which
>used floor0.
Hmm, ok, I'll try an old encoder for that, and yes, I am working 
on a Vorbis decoder for the Java Media Framework. If someone is interested 
in trying it out, please let me know - it is already sort of working.

<p>Tor

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Tirsdag, 24 september 2002, skrev du:
>IMOH there should be reference bitstreams on the vorbis website
>so that one can validate any decoder implementation against these.
There really should, but is not, and the only way to implement a 
new decoder at the moment is to reverse-engineer libvorbis. Testing 
it is also as good as impossible, as long as there are no tools to 
create ogg-files using not only parts of the specification.

I was sort of expecting the creators of Ogg/Vorbis to be interested 
in extended support for their file format, but it really doesn't 
seem to be that way.

Tor

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Onsdag, 25 september 2002, skrev du:
>Of course, it is impossible to validate a decoder against a reference 
>bitstream;
>but it might be a good quick first test, yes.  And for this, it isn't
>necessary to download reference streams from us;  you can easily 
create some
>yourself.
It would be a great help when implementing a new decoder, if there 
were reference bitstreams available, making use of all parts of the 
specification. With that I do not only mean all floor and residue 
types, but also explicit use of all whens and ifs in the specification 
algorithms. With available tools, it seems wether easy nor possible 
to create such streams. 

Tor

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