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Re: Problem loading Cocoa AU view
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Re: Problem loading Cocoa AU view


  • Subject: Re: Problem loading Cocoa AU view
  • From: Michael Hanna <email@hidden>
  • Date: Tue, 15 Mar 2005 18:22:56 -0500

The
enum {
    kParam_DelayLevel    =0,
    kParam_DelayTime    =1,
    kParam_DryWetMix    =2,
    kNumberOfParameters =3
};

struct is in both the view code and the UniTapDelay.h file. Bad idea?

thanks yes, I fixed that cut-and-paste error, and I no longer have that error and the AU passes validation too. However, in Cocoa AU Host, when I set it to UniTapDelay in the pop-up there is no view that appears, but when I choose the fifth AU in the pop-up(currently Freeverb3) the view for UniTapDelay appears. Isn't that strange?

BUT, in Rax, the Cocoa View appears fine.

Is there something wrong with the Cocoa AU Host, or my AU?

Michael

On 15-Mar-05, at 4:54 PM, Luke Bellandi wrote:

Hi Michael,

On Mar 15, 2005, at 12:14 PM, Michael Hanna wrote:

Hello all, I'm developing the Cocoa UI and I'm having trouble after adding my own parameters. The trouble arises in the _addListener callback. It appears that it's registering each parameter with the mParameterListener. It's in a loop, so I'm not sure why it'd 'work fine' with the single default parameter, but not multiple ones. Any suggestions?

Have you added your parameters to the AudioUnit itself, or just in the view code -- it's not clear from the code snippets below. Also, 1 typo I notice is:


#pragma mark ____ LISTENER CALLBACK DISPATCHER ____
AudioUnitParameter parameter[] = { { 0, kParam_DelayLevel, kAudioUnitScope_Global, 0 },
{ 0, kParam_DelayTime, kAudioUnitScope_Global, 0 },
{ 0, kParam_DelayTime, kAudioUnitScope_Global, 0 }


};

It looks like you've got a cut-and-paste error for the 3rd parameter (should be kParam_DryWetMix instead of kParam_DelayTime again)


Luke

On a side-note, this AU has Properties also. Is there a way to register the two states of the NSPopUpButton to set the NSSliders to their appropriate states and make sure that the proper changes are noted via the listeners?

Michael

*** Assertion failure in -[CocoaView _addListeners], /Users/tao/tmp/checkout/unitapdelay/trunk/CocoaView.m:161
[CocoaView _addListeners] AUListenerAddParameter()
*** Assertion failure in -[CocoaView _addListeners], /Users/tao/tmp/checkout/unitapdelay/trunk/CocoaView.m:161
[CocoaView _addListeners] AUListenerAddParameter()


- (void)_addListeners {
NSAssert ( AUListenerCreate( ParameterListenerDispatcher, self,
CFRunLoopGetCurrent(), kCFRunLoopDefaultMode, 0.100, // 100 ms
&mParameterListener ) == noErr,
@"[CocoaView _addListeners] AUListenerCreate()");


int i;
for (i = 0; i < kNumberOfParameters; ++i) {
parameter[i].mAudioUnit = mAU;
NSAssert ( AUListenerAddParameter (mParameterListener, NULL, &parameter[i]) == noErr,
@"[CocoaView _addListeners] AUListenerAddParameter()"); // fails here
}
}




related constructs ~~~~~~~

enum {
    kParam_DelayLevel    =0,
    kParam_DelayTime    =1,
    kParam_DryWetMix    =2,
    kNumberOfParameters =3
};

#pragma mark ____ LISTENER CALLBACK DISPATCHER ____
AudioUnitParameter parameter[] = { { 0, kParam_DelayLevel, kAudioUnitScope_Global, 0 },
{ 0, kParam_DelayTime, kAudioUnitScope_Global, 0 },
{ 0, kParam_DelayTime, kAudioUnitScope_Global, 0 }


                                    };


[...]

#pragma mark ____ LISTENER CALLBACK DISPATCHEE ____
- (void)_parameterListener:(void *)inObject parameter:(const AudioUnitParameter *)inParameter value:(Float32)inValue {
//inObject ignored in this case.


switch (inParameter->mParameterID) {
case kParam_DelayLevel:
[uiDelayLevelSlider setFloatValue:inValue];
[uiDelayLevelTextField setStringValue:[[NSNumber numberWithFloat:inValue] stringValue]];
break;
case kParam_DelayTime:
[uiDelayTimeSlider setFloatValue:inValue];
[uiDelayTimeTextField setStringValue:[[NSNumber numberWithFloat:inValue] stringValue]];
break;
case kParam_DryWetMix:
[uiDryWetMixSlider setFloatValue:inValue];
[uiDryWetMixTextField setStringValue:[[NSNumber numberWithFloat:inValue] stringValue]];
break;
}
}


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  • Follow-Ups:
    • Re: Problem loading Cocoa AU view
      • From: Luke Bellandi <email@hidden>
    • Re: Problem loading Cocoa AU view
      • From: Luke Bellandi <email@hidden>
References: 
 >Problem loading Cocoa AU view (From: Michael Hanna <email@hidden>)
 >Re: Problem loading Cocoa AU view (From: Luke Bellandi <email@hidden>)

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