changed effect attached to engine event callback

Author: nodeful

native/app/Source/Audio/Effects/Effect.swift

@@ -13,6 +13,7 @@ import AVFoundation
 class Effect {
   var node: AVAudioNode!
   var enabledChanged = Event<Bool>()
+  var engine: Engine?
   var name: String {
     return String(describing: self)
   }
@@ -32,12 +33,12 @@ class Effect {
     }
   }
 
-  func attachedTo (engine: AVAudioEngine) {
-    
+  func wasAttachedTo (engine: Engine) {
+    self.engine = engine
   }
 
-  func detachedFrom (engine: AVAudioEngine) {
-    
+  func wasDetachedFrom (engine: Engine) {
+    self.engine = nil
   }
 
 }

native/app/Source/Audio/Engine.swift

@@ -39,7 +39,7 @@ class Engine {
 
       let sampleTime = inTimeStamp.pointee.mSampleTime
 
-//      Console.log("Writing: ", inNumberFrames, sampleTime)
+      Console.log("Writing: ", inNumberFrames, sampleTime)
 
       if engine.ringBuffer.store(ioData!, framesToWrite: inNumberFrames, startWrite: sampleTime.int64Value) != .noError {
         return OSStatus()
@@ -100,13 +100,13 @@ class Engine {
   private func attachEqualizer () {
     engine.attach(effects.equalizers.active.eq)
     attachedEqualizer = effects.equalizers.active
-    effects.equalizers.active.attachedTo(engine: engine)
+    effects.equalizers.active.wasAttachedTo(engine: self)
   }
 
   private func detachEqualizer () {
     if attachedEqualizer != nil {
       engine.detach(attachedEqualizer!.eq)
-      attachedEqualizer?.detachedFrom(engine: engine)
+      attachedEqualizer?.wasDetachedFrom(engine: self)
       attachedEqualizer = nil
     }
   }