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#include <Cocoa/Cocoa.h>
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
#include <AudioUnit/AUCocoaUIView.h>
#define MAX_PARAMS 100
@interface PluginAU_CocoaUI : NSView
{
AudioUnit mAU;
AudioUnitParameter mParameter[MAX_PARAMS];
AUParameterListenerRef mParameterListener;
UInt32 paramCount;
}
#pragma mark ____ PUBLIC FUNCTIONS ____
- (void)setAU:(AudioUnit)inAU;
#pragma mark ____ PRIVATE FUNCTIONS
- (void)_synchronizeUIWithParameterValues;
- (void)_addListeners;
- (void)_removeListeners;
#pragma mark ____ LISTENER CALLBACK DISPATCHEE ____
- (void)_parameterListener:(void *)inObject
parameter:(const AudioUnitParameter *)inParameter
value:(Float32)inValue;
@end
@implementation PluginAU_CocoaUI
#pragma mark ____ (INIT /) DEALLOC ____
- (void)dealloc {
[self _removeListeners];
[super dealloc];
}
#pragma mark ____ PUBLIC FUNCTIONS ____
- (void)setAU:(AudioUnit)inAU {
// remove previous listeners
if (mAU) [self _removeListeners];
mAU = inAU;
paramCount = 1; //globalUI->dspPtr.getParameterCount();
UInt32 i;
for (i = 0; i < paramCount; ++i) {
mParameter[i].mAudioUnit = inAU;
mParameter[i].mParameterID = i;
mParameter[i].mScope = kAudioUnitScope_Global;
mParameter[i].mElement = 0;
}
//auUI* dspUI = [self dspUI];
// add new listeners
[self _addListeners];
// initial setup
[self _synchronizeUIWithParameterValues];
}
#pragma mark ____ LISTENER CALLBACK DISPATCHER ____
void ParameterListenerDispatcher (void *inRefCon, void *inObject,
const AudioUnitParameter *inParameter,
Float32 inValue)
{
PluginAU_CocoaUI *SELF = (PluginAU_CocoaUI *)inRefCon;
[SELF _parameterListener:inObject parameter:inParameter value:inValue];
}
#pragma mark ____ PRIVATE FUNCTIONS ____
- (void)_addListeners {
NSAssert (AUListenerCreate(ParameterListenerDispatcher, self,
CFRunLoopGetCurrent(), kCFRunLoopDefaultMode, 0.100, // 100 ms
&mParameterListener ) == noErr,
@"[_addListeners] AUListenerCreate()");
UInt32 i;
for (i = 0; i < paramCount; ++i) {
NSAssert(AUListenerAddParameter(mParameterListener,
NULL, &mParameter[i]) == noErr,
@"[_addListeners] AUListenerAddParameter()");
}
}
- (void)_removeListeners {
UInt32 i;
for (i = 0; i < paramCount; ++i) {
NSAssert (AUListenerRemoveParameter(mParameterListener,
NULL, &mParameter[i]) == noErr,
@"[_removeListeners] AUListenerRemoveParameter()");
}
NSAssert (AUListenerDispose(mParameterListener) == noErr,
@"[_removeListeners] AUListenerDispose()");
}
- (void)_synchronizeUIWithParameterValues {
Float32 value;
UInt32 i;
for (i = 0; i < paramCount; ++i) {
// only has global parameters
NSAssert (AudioUnitGetParameter(mAU, mParameter[i].mParameterID,
kAudioUnitScope_Global, 0, &value) == noErr,
@"[synchronizeUIWithParameterValues] (x.1)");
NSAssert (AUParameterSet(mParameterListener, self, &mParameter[i],
value, 0) == noErr,
@"[synchronizeUIWithParameterValues] (x.2)");
NSAssert (AUParameterListenerNotify (mParameterListener, self,
&mParameter[i]) == noErr,
@"[synchronizeUIWithParameterValues] (x.3)");
}
}
#pragma mark ____ LISTENER CALLBACK DISPATCHEE ____
- (void)_parameterListener:(void *)inObject
parameter: (const AudioUnitParameter *)inParameter
value: (Float32)inValue
{
//DPF: setUIParameter(inParameter->mParameterID, inValue);
}
@end
@interface PluginAU_CocoaUIFactory : NSObject <AUCocoaUIBase>
{
IBOutlet PluginAU_CocoaUI *uiFreshlyLoadedView;
}
- (NSString *) description;
@end
@implementation PluginAU_CocoaUIFactory
- (unsigned) interfaceVersion {
return 0;
}
- (NSString *) description {
return @"DPF: AU UI";
}
- (NSView *)uiViewForAudioUnit:(AudioUnit)inAU withSize:(NSSize)inPreferredSize {
PluginAU_CocoaUI *view = [[PluginAU_CocoaUI alloc] init];
[view setAU:inAU];
return [view autorelease];
}
@end
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