add method to un-/subscribe to audio output as well

src/audio/audio.cpp

@@ -59,6 +59,7 @@ Audio::Audio()
     , audioInLock(QMutex::Recursive)
     , audioOutLock(QMutex::Recursive)
     , inputSubscriptions(0)
+    , outputSubscriptions(0)
     , alOutDev(nullptr)
     , alInDev(nullptr)
     , outputVolume(1.0)
@@ -161,6 +162,29 @@ void Audio::unsubscribeInput()
         cleanupInput();
 }
 
+void Audio::subscribeOutput()
+{
+    QMutexLocker locker(&audioOutLock);
+
+    if (!alOutDev)
+        initOutput(Settings::getInstance().getOutDev());
+
+    outputSubscriptions++;
+    qDebug() << "Subscribed to audio output device [" << outputSubscriptions << " subscriptions ]";
+}
+
+void Audio::unsubscribeOutput()
+{
+    if (outputSubscriptions > 0)
+    {
+        outputSubscriptions--;
+        qDebug() << "Unsubscribed from audio output device [" << outputSubscriptions << " subscriptions]";
+    }
+
+    if (!outputSubscriptions)
+        cleanupOutput();
+}
+
 /**
 Open an input device, use before suscribing
 */

src/audio/audio.h

@@ -62,6 +62,8 @@ public:
 
     void subscribeInput();
     void unsubscribeInput();
+    void subscribeOutput();
+    void unsubscribeOutput();
     void openInput(const QString& inDevDescr);
     bool openOutput(const QString& outDevDescr);
 
@@ -114,6 +116,7 @@ private:
     QMutex              audioInLock;
     QMutex              audioOutLock;
     std::atomic<int>    inputSubscriptions;
+    std::atomic<int>    outputSubscriptions;
     ALCdevice*          alOutDev;
     ALCdevice*          alInDev;
     qreal               outputVolume;