Re: SetParameter() and view update notification, continued
Re: SetParameter() and view update notification, continued
- Subject: Re: SetParameter() and view update notification, continued
- From: Artemiy Pavlov <email@hidden>
- Date: Sat, 2 Sep 2006 13:44:23 +0300
Hello William,
and thanks a lot again for the help.
So as I understand, I need to first create a listener and then add a
parameter to the listener, right? The problem is I cannot locate a
"pure" example of this, only very complex (to me at least) example
plugins with custom views which simply mess things up for me with the
amount of code they have.
Also, you suggest to use event notifications instead of parameter
notifications, but the code you wrote in one of your previous posts
(http://lists.apple.com/archives/Coreaudio-api/2006/Aug/
msg00231.html) is absolutely alien to me - I simply do not get how it
works and how to set up all those functions...
Anyway, looking at the Audio Unit programming guide, there is no
tutorial or simple examples on using listeners and notifications. One
of the few things you get is "To set a parameter and notify listeners
all in one step, use the AUParameterSet function, also from the Audio
Unit Event API.". So I would understand that I only need one line of
code with AUParameterSet to do all the job... which appears to be not
the case, but I cannot locate an easy-to-read example... :-(
Artemiy.
On 2 Sep 2006, at 3:31 AM, William Stewart wrote:
you have to install a listener for this parameter, so you can know
when it changes (when the notification fires)
The call you want is AUListenerAddParameter - there's some example
usages of this (or the preferred AUEventListenerAddEventType
version) in the Carbon view code in the SDK (/Developer/Examples/
CoreAudio)
Bill
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