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AudioUnitEffectProcessor: Factor out DlgAudioUnit
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,13 @@ | ||
| #pragma once | ||
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| #include <QDialog> | ||
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| class AudioUnitManager; | ||
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| /// A dialog hosting the UI of an Audio Unit. | ||
| class DlgAudioUnit : public QDialog { | ||
| Q_OBJECT | ||
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| public: | ||
| DlgAudioUnit(const AudioUnitManager& manager); | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,169 @@ | ||
| #import <AVFAudio/AVFAudio.h> | ||
| #import <AppKit/AppKit.h> | ||
| #import <AudioToolbox/AudioToolbox.h> | ||
| #import <AudioUnit/AUCocoaUIView.h> | ||
| #import <CoreAudioKit/CoreAudioKit.h> | ||
| #import <CoreAudioTypes/CoreAudioBaseTypes.h> | ||
| #import <CoreAudioTypes/CoreAudioTypes.h> | ||
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| #include "effects/backends/audiounit/audiounitmanager.h" | ||
| #include "effects/backends/audiounit/dlgaudiounit.h" | ||
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| #include "moc_dlgaudiounit.cpp" | ||
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| #include <QString> | ||
| #include <QtGlobal> | ||
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| namespace { | ||
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| NSView* _Nullable createNativeUI( | ||
| const AudioUnitManager& manager, CGSize size, QString& outError) { | ||
| QString name = manager.getName(); | ||
| qDebug() << "Loading UI of Audio Unit" << name << "with width" << size.width | ||
| << "and height" << size.height; | ||
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| AudioUnit _Nullable audioUnit = manager.getAudioUnit(); | ||
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| if (audioUnit == nil) { | ||
| outError = "Cannot create UI of Audio Unit " + name + | ||
| " without an instance"; | ||
| return nil; | ||
| } | ||
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| // See | ||
| // https://developer.apple.com/library/archive/samplecode/CocoaAUHost/Listings/Source_CAUHWindowController_mm.html | ||
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| uint32_t dataSize; | ||
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| OSStatus infoStatus = AudioUnitGetPropertyInfo(audioUnit, | ||
| kAudioUnitProperty_CocoaUI, | ||
| kAudioUnitScope_Global, | ||
| 0, | ||
| &dataSize, | ||
| nullptr); | ||
| if (infoStatus != noErr) { | ||
| outError = "No Cocoa UI available for Audio Unit " + name; | ||
| return nil; | ||
| } | ||
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| uint32_t numberOfClasses = | ||
| (dataSize - sizeof(CFURLRef)) / sizeof(CFStringRef); | ||
| if (numberOfClasses == 0) { | ||
| outError = "No view classes available for Audio Unit " + name; | ||
| return nil; | ||
| } | ||
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| std::unique_ptr<AudioUnitCocoaViewInfo[]> cocoaViewInfo = | ||
| std::make_unique<AudioUnitCocoaViewInfo[]>(numberOfClasses); | ||
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| OSStatus status = AudioUnitGetProperty(audioUnit, | ||
| kAudioUnitProperty_CocoaUI, | ||
| kAudioUnitScope_Global, | ||
| 0, | ||
| cocoaViewInfo.get(), | ||
| &dataSize); | ||
| if (status != noErr) { | ||
| outError = "Could not fetch Cocoa UI for Audio Unit " + name; | ||
| return nil; | ||
| } | ||
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| NSURL* viewBundleLocation = | ||
| (__bridge NSURL*)cocoaViewInfo.get()->mCocoaAUViewBundleLocation; | ||
| if (viewBundleLocation == nil) { | ||
| outError = "Cannot create UI of Audio Unit " + name + | ||
| " without view bundle path"; | ||
| return nil; | ||
| } | ||
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| // We only use the first view as in the Cocoa AU host example linked earlier | ||
| NSString* factoryClassName = | ||
| (__bridge NSString*)cocoaViewInfo.get()->mCocoaAUViewClass[0]; | ||
| ; | ||
| if (factoryClassName == nil) { | ||
| outError = "Cannot create UI of Audio Unit " + name + | ||
| " without factory class name"; | ||
| return nil; | ||
| } | ||
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| NSBundle* viewBundle = [NSBundle bundleWithURL:viewBundleLocation]; | ||
| if (viewBundle == nil) { | ||
| outError = "Could not load view bundle of Audio Unit " + name; | ||
| return nil; | ||
| } | ||
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| Class factoryClass = [viewBundle classNamed:factoryClassName]; | ||
| if (factoryClass == nil) { | ||
| outError = | ||
| "Could not load view factory class from bundle of Audio Unit " + | ||
| name; | ||
| return nil; | ||
| } | ||
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| id<AUCocoaUIBase> factoryInstance = [[factoryClass alloc] init]; | ||
| if (factoryInstance == nil) { | ||
| outError = | ||
| "Could not instantiate factory for view of Audio Unit " + name; | ||
| return nil; | ||
| } | ||
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| NSView* view = [factoryInstance uiViewForAudioUnit:audioUnit withSize:size]; | ||
| if (view == nil) { | ||
| outError = "Could not instantiate view of Audio Unit " + name; | ||
| return nil; | ||
| } | ||
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| qDebug() << "Successfully loaded UI of Audio Unit" << name; | ||
| return view; | ||
| } | ||
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| }; // anonymous namespace | ||
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| DlgAudioUnit::DlgAudioUnit(const AudioUnitManager& manager) { | ||
| QString name = manager.getName(); | ||
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| setWindowTitle(name); | ||
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| // See | ||
| // https://lists.qt-project.org/pipermail/interest/2014-January/010655.html | ||
| // for why we need this slightly convoluted cast | ||
| NSView* dialogView = (__bridge NSView*)reinterpret_cast<void*>(winId()); | ||
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| // Style effect UI as a floating, but non-modal, HUD window | ||
| NSWindow* dialogWindow = [dialogView window]; | ||
| [dialogWindow setStyleMask:NSWindowStyleMaskTitled | | ||
| NSWindowStyleMaskClosable | NSWindowStyleMaskResizable | | ||
| NSWindowStyleMaskUtilityWindow | NSWindowStyleMaskHUDWindow]; | ||
| [dialogWindow setLevel:NSFloatingWindowLevel]; | ||
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| QString error = "Could not load UI of Audio Unit"; | ||
| NSView* audioUnitView = createNativeUI(manager, size().toCGSize(), error); | ||
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| if (audioUnitView != nil) { | ||
| [dialogView addSubview:audioUnitView]; | ||
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| // Automatically resize the dialog to fit the view after layout | ||
| [audioUnitView setPostsFrameChangedNotifications:YES]; | ||
| [[NSNotificationCenter defaultCenter] | ||
| addObserverForName:NSViewFrameDidChangeNotification | ||
| object:audioUnitView | ||
| queue:[NSOperationQueue mainQueue] | ||
| usingBlock:^(NSNotification* notification) { | ||
| NSView* audioUnitView = | ||
| (NSView*)notification.object; | ||
| NSWindow* dialogWindow = audioUnitView.window; | ||
| CGSize size = audioUnitView.frame.size; | ||
| [dialogWindow setContentSize:size]; | ||
| }]; | ||
| } else { | ||
| qWarning() << error; | ||
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| // Fall back to a generic UI if possible | ||
| AudioUnit _Nullable audioUnit = manager.getAudioUnit(); | ||
| if (audioUnit != nil) { | ||
| AUGenericView* genericView = | ||
| [[AUGenericView alloc] initWithAudioUnit:audioUnit]; | ||
| genericView.showsExpertParameters = YES; | ||
| [dialogView addSubview:genericView]; | ||
| } | ||
| } | ||
| } |