[Flac-dev] Altivec, automake
xflac at yahoo.com
Tue Jul 27 18:38:04 PDT 2004
finished hooking up the altivec stuff so it works in ProjectBuilder.
I ran a test, doing a 'flac -t' on 400MB of files compresses at
level 5. the runtime dropped from from 180 sec to 105 sec!
once I get the latest autotools on my ibook I'll try and get
asm compilation to work that way.
--- Josh Coalson <xflac at yahoo.com> wrote:
> OK, checked it all in (only minor modifications: I used the
> existing FLAC routines for allocating aligned memory).
> on a side note, I got the Project Builder stuff all working
> again. still have to figure out how to integrate assembly
> compilation though.
> --- Brady Patterson <brady at spaceship.com> wrote:
> > Here's what I listed in that email. Merging doesn't appear to be
> > necessary. If
> > you have any build problems, let me know.
> > Note that my detection code is Darwin-specific. It's a BSD call
> > (sysctl()), so
> > a change to the platform-detection macros should enable it to work
> > other
> > BSDs. However, I don't know what that would be, and I couldn't
> > determine any
> > safe way to do the check in Linux, nor do I have any way to test
> > anything other
> > than OS X. The altivec code itself should work on any platform with
> > altivec.
> > Regarding performance, command-line decoding will see a modest
> > improvement, but
> > it's really bottlenecked by the MD5 checking (and I don't have a
> > as to how
> > to optimize that). Real-time decoding should be improved
> > substantially -- I've
> > been meaning to test that and will get back to you with the
> > --
> > Brady Patterson (brady at spaceship.com)
> > RLRR LRLL RLLR LRRL RRLR LLRL
> > On Sun, 25 Jul 2004, Josh Coalson wrote:
> > > PS, Brady, do you still have these patches? you don't have to
> > > make them current, just send them as-is, I can merge them.
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