[theora-dev] Block Coding Pattern
dan at on2.com
Thu Feb 20 17:50:44 PST 2003
yeah, I noticed that while working on the spec. It looks to me like an experiment that never converged. However I will be looking closely at these sorts of issues as I complete the spec. Eventually we will get rid of the deadwood.
From: Mike Melanson [mailto:melanson at pcisys.net]
Sent: Wed 2/19/2003 9:07 PM
To: theora-dev at xiph.org
Subject: [theora-dev] Block Coding Pattern
There seem to be 2 sets of block coding patterns in the
VP3x/Theora algorithm. Based on the comments in the code, the first
pattern is used if encoder version < 6 and the second pattern is used in
encoder version >= 6. None of the code to support the second pattern is
ever called. Is there an encoder with a version >= 6?
The code in question is QuadDecodeDisplayFragments() vs.
QuadDecodeDisplayFragments2() in CoreLibs/CDXV/Vp31/dx/generic/Frarray.c.
They follow different pattern rules. But the second version is never
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