[FFmpeg-devel] [PATCH] Add filter_limit to VP3 loop filter paramaters

[Diego Biurrun]

On Sat, Oct 04, 2008 at 12:17:03AM -0400, David Conrad wrote:
>
> The C implementation of the VP3 loop filter uses a table of pre- 
> calculated values for the filter function. This doesn't work so well in 
> SIMD; it's faster to calculate the function with the limit value.
>
> Implementing the C version without the table is slightly faster on my  
> Penryn, but about 20% slower on P4, so it's probably not worth it to  
> replace the C version to get rid of the table completely.

Depending on how much speedup you get elsewhere I think you can ignore
P4 benchmark numbers.  The P4 is a deadborn child.

Diego