| here are the steps that seem to be the minimum for starting up with a cocoa view. this uses the AUInstrumentBase (not the EffectBase...but it should be really similar) i will probably miss something, so please add corrections.
1. create your new audio unit. 2. select the project and choose "add target" and choose "framework & library" > bundle. 3. in your new target, create a. a new .xib (view) file b. a subclass of NSView, with in the header i. an private instance variable of type "AudioUnit" named "mAU" ii. the method -(void)setAU:(AudioUnit)inAU; in the source i. - (void)setAU:(AudioUnit)inAU{mAU = inAU;}
c. a viewFactory class (just copy it from the filter demo project) i. rename the class and IBOutlet in the header to match the view class you just created ii. in the source, change the name of the bundle (after "loadNibNamed" to your AU bundle name) iii. and update the class names to reflect your view class, not the filterview class
4. in your .xib, set the class of your view to be the view class you created. 5. set the .xib file's owner to be your viewfactory class. 6. connect the "uiFreshlyLoadedView" outlet of the file's owner to the .xib view 7. in you audio unit class header add two methods: virtual OSStatus GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ); virtual OSStatus GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable);
8. in the audio unit source implement those methods (replace YourAudioUnit with your audio unit, replace the bundle name with the bundle id of your AU, insert the name of yourViewBundle, and the name of yourViewFactory.
OSStatus YourAudioUnit::GetPropertyInfo (AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, UInt32 & outDataSize, Boolean & outWritable) { //printf("\tstart get prop info"); if (inScope == kAudioUnitScope_Global) { switch (inID) { case kAudioUnitProperty_CocoaUI: outWritable = false; printf("settingOutdataSize"); outDataSize = sizeof (AudioUnitCocoaViewInfo); printf("%i",outDataSize); return noErr;
}
return AUInstrumentBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable); } return noErr; }
OSStatus YourAudioUnit::GetProperty( AudioUnitPropertyID inID, AudioUnitScope inScope, AudioUnitElement inElement, void * outData ) { if (inScope == kAudioUnitScope_Global) { switch (inID) { case kAudioUnitProperty_CocoaUI: { // Look for a resource in the main bundle by name and type. CFBundleRef bundle = CFBundleGetBundleWithIdentifier( CFSTR("your.audio.unit.bundle") );
if (bundle == NULL) { printf("bundle didn't load"); return fnfErr;
} CFURLRef bundleURL = CFBundleCopyResourceURL( bundle, CFSTR("yourViewBundle"), CFSTR("bundle"), NULL);
if (bundleURL == NULL){ return fnfErr; printf("bundleURL didn't work");
} if(bundleURL){
printf("ok"); }
CFStringRef className = CFSTR("yourViewFactory"); // name of the main class that implements the AUCocoaUIBase protocol AudioUnitCocoaViewInfo cocoaInfo; cocoaInfo.mCocoaAUViewBundleLocation = bundleURL; cocoaInfo.mCocoaAUViewClass[0] = className;
*((AudioUnitCocoaViewInfo *)outData) = cocoaInfo;
return noErr;
} } }
return AUInstrumentBase::GetProperty (inID, inScope, inElement, outData); }
9. in your AU build settings, add your view bundle as a target dependency and add a "copy bundle resources" stage and add your bundle there as well.
10. build and hope it works....
ben |