[mythtv] [PATCH] quick DNR (again)

[D Banerjee]

Here's my dnr filter plugin again. I made a MMX/3DNOW codepath but on my
system (athlon classic 800) they both run just a tad slower than default.
Looks like SSE would provide more gain but I don't have a system to test it
on. Of course I just learned how to code for mmx today :) I'm not sure if
you can optimize per-byte comparisons in the way that I am attempting to
with MMX. If you want to try them change the 'ARCH_default' define.

Isaac: I did all of your requests except checking video format per frame,
I'll just make another patch to make sure filters are reloaded on video
format change.

-Debabrata


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