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From: Brad (bradcomstyle.com)
Date: Mon Aug 25 2008 - 11:45:18 CDT
On Sun, 24 Aug 2008 23:21:10 +0200
Matthias Kilian <kilioutback.escape.de> wrote:
> On Sun, Aug 24, 2008 at 12:22:07AM -0400, Brad wrote:
> > The following diff for x264 switches the library from using
> > the signals method of AltiVec detection to using the sysctl
> > method and adds support for detecting the # of CPUs using
> > the sysctl.
> What's the correct way to test this? I tried
> $ ffmpeg -input foo.mpg -vcodec libx264 output.avi
> with and without the patch and didn't notice any performance
> improvement nor any (visible) output difference. If Altivec applies
> only to decoding, I've to do some more tests.
> And on arm, I get bus errors for the above command line regardless
> of what version fo x264 is used.
What you did above is correct. You will not notice any difference because
AltiVec was already enabled. This just changes the method used to detect
the presence of AltiVec.
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