Try not to use atomics in performance code

src/audio/AudioThread.cpp

@@ -21,8 +21,8 @@ std::map<int, std::thread *> AudioThread::deviceThread;
 AudioThread::AudioThread() : IOThread(),
         currentInput(nullptr), inputQueue(nullptr), nBufferFrames(1024), sampleRate(0) {
 
-	audioQueuePtr.store(0); 
-	underflowCount.store(0);
+	audioQueuePtr = 0; 
+	underflowCount = 0;
 	active.store(false);
 	outputDevice.store(-1);
     gain = 1.0;

src/audio/AudioThread.h

@@ -92,13 +92,13 @@ public:
     static void setDeviceSampleRate(int deviceId, int sampleRate);
 
     //fields below, only to be used by other AudioThreads !
-    std::atomic_uint underflowCount;
+    size_t underflowCount;
     //protected by m_mutex
     std::vector<AudioThread *> boundThreads;
     AudioThreadInputQueuePtr inputQueue;
     AudioThreadInputPtr currentInput;
-    std::atomic_uint audioQueuePtr;
-    std::atomic<float> gain;
+    size_t audioQueuePtr;
+    float gain;
 
 private: