On Sat, 24 Sep 2022, Hendrik Leppkes wrote:
On Sat, Sep 24, 2022 at 9:26 PM Hendrik Leppkes <[email protected]> wrote:
On Sat, Sep 24, 2022 at 8:43 PM Martin Storsjö <[email protected]> wrote:
>
> On Sat, 24 Sep 2022, Lynne wrote:
>
> > This commit changes both the encoder and decoder to use the new lavu/tx
code,
> > which has faster C transforms and more assembly optimizations.
>
> What's the case of e.g. 32 bit arm - that does have a bunch of fft and
> mdct assembly, but is that something that ends up used by opus today, or
> does the mdct15 stuff use separate codepaths that aren't optimized there
> today yet?
>
mdct15 only has some x86 assembly, nothing for ARM.
Only the normal (power of 2) fft/mdct has some ARM 32-bit assembly.
Actually, I missed that the mdct15 internally uses one of the normal
fft functions for a part of the calculation, but how much impact that
has on performance vs. the new code where the C alone is quite a bit
faster would have to be confirmed by Lynne.
Ok, fair enough.
What about ac3dsp then - that one seems like it's fairly optimized for
arm?
// Martin
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