use a QPointer to trigger delayed delete

libraries/audio/src/AudioInjector.cpp

@@ -55,6 +55,12 @@ void AudioInjector::setIsFinished(bool isFinished) {
         
         _isStarted = false;
         _shouldStop = false;
+        
+        if (_shouldDeleteAfterFinish) {
+            // we've been asked to delete after finishing, trigger a queued deleteLater here
+            qDebug() << "triggering the delete since we are finished";
+            QMetaObject::invokeMethod(this, "deleteLater", Qt::QueuedConnection);
+        }
     }
 }
 

libraries/audio/src/AudioInjector.h

@@ -46,7 +46,9 @@ public:
 public slots:
     void injectAudio();
     void restart();
+    
     void stop();
+    void triggerDeleteAfterFinish() { _shouldDeleteAfterFinish = true; }
     void stopAndDeleteLater();
     
     void setOptions(AudioInjectorOptions& options) { _options = options; }
@@ -69,6 +71,7 @@ private:
     float _loudness = 0.0f;
     bool _isStarted = false;
     bool _isFinished = false;
+    bool _shouldDeleteAfterFinish = false;
     int _currentSendPosition = 0;
     AbstractAudioInterface* _localAudioInterface = NULL;
     AudioInjectorLocalBuffer* _localBuffer = NULL;

libraries/script-engine/src/ScriptAudioInjector.cpp

@@ -29,6 +29,11 @@ ScriptAudioInjector::ScriptAudioInjector(AudioInjector* injector) :
 }
 
 ScriptAudioInjector::~ScriptAudioInjector() {
+    if (!_injector.isNull()) {
+        // we've been asked to delete after finishing, trigger a queued deleteLater here
+        QMetaObject::invokeMethod(_injector.data(), "triggerDeleteAfterFinish", Qt::QueuedConnection);
+    }
+    
 }
 
 void ScriptAudioInjector::stopInjectorImmediately() {

libraries/script-engine/src/ScriptAudioInjector.h

@@ -39,7 +39,7 @@ signals:
 protected slots:
     void stopInjectorImmediately();
 private:
-    AudioInjector* _injector;
+    QPointer<AudioInjector> _injector;
     
     friend QScriptValue injectorToScriptValue(QScriptEngine* engine, ScriptAudioInjector* const& in);
 };