Re: Optimizing my 128 channel IOProc.
Re: Optimizing my 128 channel IOProc.
- Subject: Re: Optimizing my 128 channel IOProc.
- From: Chris Rogers <email@hidden>
- Date: Wed, 19 Oct 2005 17:20:38 -0700
Mark,
The CoreAudio.component symbols are stripped out in release builds,
so the reference to AUMultibandCompressorEntry
is erroneous, a red herring. The matrix mixer doesn't do any
compression, just straight optimized mixing...
Chris Rogers
Core Audio
Apple Computer
On Oct 19, 2005, at 5:13 PM, Mark Gilbert wrote:
Thanks to those folks who made suggestions on how to speed things
up in my heavy laden 128 audio channel IOProc.
I delved into shark, and within 20 minutes I had shaved huge
amounts off the tight loops.
Now, I have done what I think is practical in my own code, and I am
left with something unusual.
In Shark, alongside my main IOProc for the input and my render proc
for the output, I see 'AUMultibandCompressorEntry' taking a
whopping 10%.
I have a feeling this must be related to the AUGraph Matrix Mixer I
have on the back end of my application, but I am not using any
compressors to my knowledge.
Can anyone shed any light ?
Cheers
Mark Gilbert.
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