Re: Bug in AUEventListener?
Re: Bug in AUEventListener?
- Subject: Re: Bug in AUEventListener?
- From: William Stewart <email@hidden>
- Date: Mon, 01 Nov 2004 10:58:38 -0800
For more detail and a workaround:
Bug: AUEventListener does not handle kAudioUnitEvent_ParameterValueChange
events correctly
Events aren't still in the queue, as Urs hypothesizes. When listening
to ParameterValueChange events using the AUEventListener mechanism, the
remove-listener API does not take listeners out of its
object-notification queue -- so future notifications are being sent to
stale objects.
The workaround for the problem is to use AUEventListener only
for ParameterBegin and End notifications, and use a separate
AUParameterListener instead of kAudioUnitEvent_ParameterValueChange for
parameter value changes.
Best,
Luke
Urs,
Let me know if this works for you and we'll write this up as a tech note.
On 1/11/04 10:40 AM, "Doug Wyatt" <email@hidden> wrote:
> On Oct 30, 2004, at 14:11, Urs Heckmann wrote:
>> My current guess is, that if the AUEventListener is disposed, some
>> events might still be in the queue, and on re-install *before*
>> something magical in the RunLoop ditches them some undefined behaviour
>> occurrs. Dunno.
>
> Excellent guess :-/
>
>> So, is that only me or is it a bug in the Listener stuff?
>
> It's not only you. This was isolated and fixed perhaps a month ago.
>
> Doug
>
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