Re: One Cocoa view for multiple AUs?
Re: One Cocoa view for multiple AUs?
- Subject: Re: One Cocoa view for multiple AUs?
- From: ipmlists <email@hidden>
- Date: Tue, 10 Nov 2009 10:06:44 +0000
2009/11/10 Brian Willoughby <email@hidden>:
>
> On Nov 9, 2009, at 13:45, ipmlists wrote:
>>
>> 2009/11/7 Brian Willoughby <email@hidden>:
>>>
>>> I believe that what you will have to do is make a map at run time from
>>> the
>>> parameters of each of the embedded AUs, and then fold them into your
>>> wrapper
>>> AU.
>>>
>>> <snip>
>>>
>>> Once you have the map, your wrapper AU would report the combined list of
>>> parameters as its own. Then you need to rewrite the parameter functions
>>> to
>>> detect whether a given parameter change is local or intended for an
>>> embedded
>>> AU, passing the parameter change on when necessary.
>>
>> Ok, this is where I'm having problems: there's no way (is there?) to
>> override AUParameterSet or AudioUnitSetParameter, so how can the
>> wrapper AU intercept param change requests coming from the view?
>
> You don't override the system API AUParameterSet or AudioUnitSetParameter -
> those are intended for dealing with AudioUnits from the "outside." Instead,
> when working "inside" the AudioUnit itself, you override
> AUBase::GetParameter() in your subclass. Look around at the AudioUnit
> examples, including the ones which derive from AUEffectBase or
> AUInlineEffectBase.
Aggh - of course! Sorry - brain not fully engaged. Thanks.
Iain
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