1 files changed, 156 insertions, 0 deletions
diff --git a/distrho/src/CocoaUI/PluginAU_CocoaUI.m b/distrho/src/CocoaUI/PluginAU_CocoaUI.m
new file mode 100644
index 00000000..ee8da585
--- /dev/null
+++ b/distrho/src/CocoaUI/PluginAU_CocoaUI.m
@@ -0,0 +1,156 @@
+#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