Nicolas Pitre | 2 May 04:30

Free fixed point (integer) based Vorbis audio decoder coming soon


This is to let everybody know that I've successfully converted the reference 
implementation Vorbis decoder to integer math.  I'm able to play Vorbis 
streams with about 20% CPU usage on a 206MHz StrongARM (actually nice for a 
first shot).

I'm also pondering the possibility, if allowed, to license the resulting
code under the GPL.  I know that Xiphophorus has a commercial implementation
of such a lib, so if I have permission from them to license my work under
the GPL it would preserve their revenue source at some point.

My integer version is based on the understanding I could gather from some
reverse engineering on the current reference implementation code.  This is
however prone to overflows and other errors as I can't check against a
formal specification since it apparently doesn't exist yet.  Still it seems
to work for me so far.

When I'm done with code cleaning I'll post the URL for everybody to enjoy.

Nicolas

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Gmane