Re: BeginParameterChangeGesture AU event listener weirdness
Re: BeginParameterChangeGesture AU event listener weirdness
- Subject: Re: BeginParameterChangeGesture AU event listener weirdness
- From: William Stewart <email@hidden>
- Date: Tue, 19 Jul 2005 12:12:34 -0700
Marc
The any parameter event type is for notification only - for instance
in AUHosting its used *after* you set a preset to tell the listener
that everything has changed. But we've never supported using this to
install a listener and trying to use it in this way; we really should
return an error to avoid this confusion
Bill
On 19/07/2005, at 11:32 AM, Marc Poirier wrote:
I am installing an AUEventListener for teh
BeginParameterChangeGesture type AUEvent using the AnyParameter
wildcard like so:
memset(¶meterGestureBeginAUEvent, 0, sizeof
(parameterGestureBeginAUEvent));
parameterGestureBeginAUEvent.mEventType =
kAudioUnitEvent_BeginParameterChangeGesture;
parameterGestureBeginAUEvent.mArgument.mParameter.mAudioUnit =
GetEditAudioUnit();
parameterGestureBeginAUEvent.mArgument.mParameter.mParameterID =
kAUParameterListener_AnyParameter;
parameterGestureBeginAUEvent.mArgument.mParameter.mScope =
kAudioUnitScope_Global;
parameterGestureBeginAUEvent.mArgument.mParameter.mElement = 0;
AUEventListenerAddEventType(auEventListener, this,
¶meterGestureBeginAUEvent);
The AUEventListener was created successfully (no error), and this
event gets added successfully, but unfortunately the listening
itself doesn't work as I would expect. When my listener callback
gets the AudioUnitParameter passed to it describing the parameter
propogating the gesture-begin event, its AudioUnitParameterID is
kAUParameterListener_AnyParameter in every case, rather than that
parameter's actual ID. This is not how it works when you install a
parameter change listener using that wildcard, and I simply don't
see how this could possibly be useful behavior, so I'm inclined to
think it's a bug. Or maybe I am doing something wrong? Any ideas
are welcome...
thanks,
Marc
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
--
mailto:email@hidden
tel: +1 408 974 4056
________________________________________________________________________
__
"Much human ingenuity has gone into finding the ultimate Before.
The current state of knowledge can be summarized thus:
In the beginning, there was nothing, which exploded" - Terry Pratchett
________________________________________________________________________
__
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden