Re: Canonical format max amp limits?
Re: Canonical format max amp limits?
- Subject: Re: Canonical format max amp limits?
- From: Mark Cookson <email@hidden>
- Date: Wed, 14 Jul 2004 13:42:43 -0500
On Jul 14, 2004, at 12:47 PM, Stephen Davis wrote:
The clipping requires more if statements than the one presented in my
sample code. How does that make mine slower? Does CoreAudio use
AltiVec?
Yes, and the AltiVec unit can do branchless clipping as well.
The clip routines in the audio kernel extensions don't use AltiVec.
It's possible, but not encouraged, to use AltiVec in the kernel (just
like it's possible, but not encouraged to use floating point in the
kernel, only more so).
I'm looking forward to the day that the convert and clip routines get
AltiVec blitters, but it's not there in 10.3.4.
--
Mark Cookson
M-Audio
225 Locust St.
Hudson, WI 54016
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