[theora-dev] dead DCSearchPoints code

Mike Melanson melanson at pcisys.net
Sat Jun 14 11:57:53 PDT 2003

On Sat, 14 Jun 2003, Dan Miller wrote:

> I'll take your word for it.  You've gone deeper into the code than I have at this point.  If you're up for helping with the spec, I certainly could use some.

        I'm up to it-- I have quite a bit of it written already. Do you
think I should post my present document on my codec site for comment, but
mark many of the sections as unfinished? It would certainly beat my
vp3-notes.txt file.

        My ffmpeg VP3 implementation is going well. The 2 big items I am
working on are: 1) Porting the exact VP3 IDCT; 2) I was recently
introduced to something called "unrestricted motion vectors" and I need to
make those play nice with ffmpeg.

> Speaking of dead code, there's junk in huffman.c that can be removed -- I posted about this before.

        The only part of the original VP3 decoder that was ported over to
ffmpeg almost in its entirety was the DC prediction reversal code, mainly
because that really is the simplest way to do it. Everything, and I mean
everything, else was redone. If it wasn't used in the original VP3 source,
it didn't make it into the new decoder.

	-Mike Melanson

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