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Old 24th August 2004, 16:42   #1  |  Link
ffdshow/AviSynth wrangler
Leak's Avatar
Join Date: Feb 2003
Location: Austria
Posts: 2,441
MMX optimized LeakKernelDeint 1.5.4

Well, the last version of KernelDeint came out about a year ago, so I decided to take a look at it since I've been heavily using it in my BlendBob plugin.

Much to my surprise, I found that the code was pure C++, with no SIMD optimizations in sight, so I went and optimized it (and took care of a handful of bugs while I was at it):

LeakKernelDeint 1.5.4 (with source)

I've revamped the motion mask code to use a combined motion mask for both chroma planes in YV12/YUY2, which gets rid of some stray chroma artefacts that the older versions of KernelDeint produced when it deinterlaced a spot on only one chroma plane instead of on both.

I've also made the code mirror the top and bottom 4 lines when deinterlacing them so the resolution at the top and bottom is kept intact - the older versions just duplicated every other line there.

Additionally, I've added a LeakKernelBob function to the plugin that takes the same parameters as LeakKernelDeint but does full framerate deinterlacing (i.e. it returns a frame for every field).

And, of course, I've made the whole thing faster using MMX...

(I assume that my pure C++ implementations of the various functions perform a bit worse than Donald's code, but unless you force those to be used it'll use the MMX implementations - which, on my machine, are about 2.5 times as fast as the original KernelDeint in YV12 when measured using AvsTimer, and even more in YUY2 and RGB32)


np: Funkstörung - Captured In Tones (ft. Sarah Jay) (Disconnected)

Last edited by Leak; 6th November 2006 at 12:39.
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