Graceful shutdown of SELCAL player with audio context

src/blacksound/selcalplayer.cpp

@@ -24,6 +24,11 @@ namespace BlackSound
     }
 
     CSelcalPlayer::~CSelcalPlayer()
+    {
+        this->gracefulShutdown();
+    }
+
+    void CSelcalPlayer::gracefulShutdown()
     {
         m_threadedPlayer.quitAndWait();
     }

src/blacksound/selcalplayer.h

@@ -32,6 +32,9 @@ namespace BlackSound
         //! Destructor
         virtual ~CSelcalPlayer() override;
 
+        //! Stop the player thread
+        void gracefulShutdown();
+
         //! Play SELCAL
         //! \return Time of the played tone
         BlackMisc::PhysicalQuantities::CTime play(int volume, const BlackMisc::Aviation::CSelcal &selcal);