Re: AUKernel Lifecycle ?
Re: AUKernel Lifecycle ?
- Subject: Re: AUKernel Lifecycle ?
- From: Robert Abernathy <email@hidden>
- Date: Wed, 2 Nov 2005 18:25:40 +0000
O.K. Thanks for the info.
But, this leaves me confused as to how a kernel is supposed to
interact in the Initialize/Uninitialize cycle. In particular, how/
when should the kernel react to changing resource requirements (like
buffers and such)?
Rob
On 2 Nov 2005, at 18:07, Marc Poirier wrote:
The way it's currently implemented in AUEffectBase is that kernels
are created as needed and deleted when not needed. So I guess that
is to say, so far as what the lifespan of one is, it depends.
During Initialize(), AUEffectBase checks how many channels are set
for the current stream format. If there are not enough kernels
instantiated at that point (and during the first Initialize(), that
is definitely true, since none have been created yet at that
point), then more kernel instances are created. On the other hand,
if, at that point, there are too many kernels, then the extra
instances are deleted. If there is the right amount, then nothing
changes. Then, at the end of the AU instance's life, whatever
kernel instances are still around will be deleted.
So, in other words: no, they are not bound to a single Initialize/
Uninitialize cycle. They are created and deleted only as needed.
Marc
On Nov 2, 2005, at 11:13 AM, Robert Abernathy wrote:
Hopefully, this will be an easy one.
I'm a bit confused about the AU construction/initialization/reset
life cycle and how it manifests itself in the case where the AU
uses the AUKernel path.
Do a new kernels get created for each Initialization on the AU. I
have no reason to think this other than I can't see how it would
work otherwise.
If so, can I then trust that mAudioUnit->GetMaxFramesPerSlice()
will be correct for the life of the Kernel?
Thanks for the help.
Rob
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