Re: Some AudioUnits crash WhackedTV sample code
Re: Some AudioUnits crash WhackedTV sample code
- Subject: Re: Some AudioUnits crash WhackedTV sample code
- From: Robert Abernathy <email@hidden>
- Date: Mon, 20 Mar 2006 21:52:36 +0000
Bill,
The only AU that I currently have on my system that crashes WhackedTV
is my own. All of the Apple AU's work fine (including FilterDemo -
so, It doesn't appear to be a Cocoa UI problem). I'd like to try to
look into this further. But, I think I need to know more about the
expert parameters and I can't find the docs (Google has failed me).
Where should I look? If I can get a bit more info on this, I hope to
put together a small test case. F8 has a few too many parameters to
be useful for anything small.
Rob
On 20 Mar 2006, at 20:58, William Stewart wrote:
OK - could you file a radar report and I'll have a look at this in
some more detail (http://bugreporter.apple.com)
one other piece of information that would be useful - if you were
to try this with say one of Apple's AUs (like AUBandpass,
AUMatrixReverb, AUMulitbandCompressor) that don't have any expert
params, does it still crash?
Thanks
Bill
On 17/03/2006, at 4:35 PM, john wrote:
Hi Bill,
I see that, in my code, if I remove the setShowsExpertParameters:
call the F8 AU displays ok, like in AULab. However, the iZotope
Vinyl AU does not display properly, and also crashes AULab when
selecting the generic view.
The F8 and Vinyl AU's pass validation, but the DestroyFX transverb
does not.
-- John
This code is provided by people in the QT Group - you might want
to ask them (QT API)
You can also validate the AUs you are using - run the auval tool
on these. If these AUs pass or fail validation would be
interesting to know.
You can also host these AUs in the AU Lab application (/Developer/
Applications/Audio/) - you can bring up either their custom or
show their generic views. If the AUs have expert parameters, then
you'll see a disclosure triangle that when expanded, will show
the expert params. (Oh, expert params are params that are marked
with the "expert" flag - so they should not normally be presented
to users)
Bill
I looked at this a bit with F8. The crash with F8 occurs at
line 1898 of SGAudioSettings.mm "[auview
setShowsExpertParameters:YES];"
What does setShowsExpertParameters turn on? If I comment out
this line and then load F8, it doesn't crash. But, the
GenericView shows a random subset of the F8 parameters when it
is loaded.
If someone can point me at documentation for AUGenericView,
perhaps I can figure out what parameter information F8 is
providing that is instigating the crash.
Rob
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