[FFmpeg-devel] [PATCH] h264: factor out dequant table lookup outside loops
Mon Sep 24 15:10:51 CEST 2007
On 9/24/07, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Mon, Sep 24, 2007 at 12:59:21PM +0200, Andreas ?man wrote:
> > Hi,
> > the attached patch does $subj, much like what I did for
> > the chroma residuals earlier.
> > Gives about 1-2% speedup.
> > Note that I tried various loop-constructs for the 8x8DCT case,
> > but this seems to be the fastest way.
> > test_smp_fox.ts
> > unmodified: avg: 3.737 stddev: 0.009 med: 3.736
> > patched: avg: 3.642 stddev: 0.010 med: 3.638
> > ffh264_issue1.m2ts
> > unmodified: avg: 23.339 stddev: 0.107 med: 23.321
> > patched: avg: 22.973 stddev: 0.201 med: 22.889
> > ffh264_issue3.h264
> > unmodified: avg: 10.090 stddev: 0.121 med: 10.053
> > patched: avg: 9.931 stddev: 0.140 med: 9.891
> patch ok
Works fine here. Applied.
> and if you want svn write access, and agree with our svn policy then
> send diego username+password of your choice (and gpg encrypted if possible)
Agreed, I was about to suggest the same thing too ;-)
A soldier will fight long and hard for a bit of colored ribbon.
-- Napoleon Bonaparte
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