use subclass for interface's Audio interface

interface/src/Application.cpp

@@ -147,6 +147,7 @@
 #include "networking/HFWebEngineProfile.h"
 #include "networking/HFTabletWebEngineProfile.h"
 #include "networking/FileTypeProfile.h"
+#include "scripting/Audio.h"
 #include "scripting/TestScriptingInterface.h"
 #include "scripting/AccountScriptingInterface.h"
 #include "scripting/AssetMappingsScriptingInterface.h"
@@ -720,7 +721,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer, bo
         }
     });
 
-    auto audioScriptingInterface = DependencyManager::set<AudioScriptingInterface>();
+    auto audioScriptingInterface = DependencyManager::set<AudioScriptingInterface, scripting::Audio>();
     connect(audioThread, &QThread::started, audioIO.data(), &AudioClient::start);
     connect(audioIO.data(), &AudioClient::destroyed, audioThread, &QThread::quit);
     connect(audioThread, &QThread::finished, audioThread, &QThread::deleteLater);

interface/src/scripting/Audio.cpp

@@ -0,0 +1,14 @@
+//
+//  Audio.cpp
+//  interface/src/scripting
+//
+//  Created by Zach Pomerantz on 28/5/2017.
+//  Copyright 2017 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#include "Audio.h"
+
+using namespace scripting;

interface/src/scripting/Audio.h

@@ -0,0 +1,37 @@
+//
+//  Audio.h
+//  interface/src/scripting
+//
+//  Created by Zach Pomerantz on 28/5/2017.
+//  Copyright 2017 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+#ifndef hifi_scripting_Audio_h
+#define hifi_scripting_Audio_h
+
+#include "AudioScriptingInterface.h"
+
+namespace scripting {
+
+class Audio : public AudioScriptingInterface {
+    Q_OBJECT
+    SINGLETON_DEPENDENCY
+
+    // TODO: Q_PROPERTY(bool mute)
+    // TODO: Q_PROPERTY(bool noiseReduction)
+    // TODO: Q_PROPERTY(bool showMicLevel)
+    // TODO: Q_PROPERTY(? devices)
+
+public:
+    virtual ~Audio() {}
+
+protected:
+    Audio() {}
+};
+
+};
+
+#endif // hifi_scripting_Audio_h

libraries/script-engine/src/AudioScriptingInterface.cpp

@@ -19,12 +19,6 @@ void registerAudioMetaTypes(QScriptEngine* engine) {
     qScriptRegisterMetaType(engine, soundSharedPointerToScriptValue, soundSharedPointerFromScriptValue);
 }
 
-AudioScriptingInterface::AudioScriptingInterface() :
-    _localAudioInterface(NULL)
-{
-
-}
-
 ScriptAudioInjector* AudioScriptingInterface::playSound(SharedSoundPointer sound, const AudioInjectorOptions& injectorOptions) {
     if (QThread::currentThread() != thread()) {
         ScriptAudioInjector* injector = NULL;

libraries/script-engine/src/AudioScriptingInterface.h

@@ -28,6 +28,7 @@ public:
     void setLocalAudioInterface(AbstractAudioInterface* audioInterface) { _localAudioInterface = audioInterface; }
 
 protected:
+    AudioScriptingInterface() {}
 
     // this method is protected to stop C++ callers from calling, but invokable from script
     Q_INVOKABLE ScriptAudioInjector* playSound(SharedSoundPointer sound, const AudioInjectorOptions& injectorOptions = AudioInjectorOptions());
@@ -44,9 +45,7 @@ signals:
     void inputReceived(const QByteArray& inputSamples); /// a frame of mic input audio has been received and processed
 
 private:
-    AudioScriptingInterface();
-
-    AbstractAudioInterface* _localAudioInterface;
+    AbstractAudioInterface* _localAudioInterface { nullptr };
 };
 
 void registerAudioMetaTypes(QScriptEngine* engine);