[Ffmpeg-devel] [PATCH] qpel approximation

[Guillaume POIRIER]

Hi,

On 2/18/06, Loren Merritt <lorenm at u.washington.edu> wrote:
> This patch adds approximate bilinear qpel mc functions, enabled for
> B-frames only, with -lavdopts fast.
> Comments: does it look ok? should it have a separate option?
>
> 16x16 mc costs, averaged over all subpel positions:
> mpeg4 qpel:   1443 cycles
> h264 qpel:    1148 cycles
> bilinear qpel: 174 cycles
> mpeg4 hpel:     99 cycles
>
> total speedup: ~12% in mpeg4, ~5% in h264.

Michael, you never commented on this patch. Do you need it to be resent to you?

Guillaume
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