AudioStream: Replace buffer queue with ring buffer

Should achieve a decent overall minimum latency reduction.

src/common/cubeb_audio_stream.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "common/audio_stream.h"
 #include "cubeb/cubeb.h"
+#include <atomic>
 #include <cstdint>
 
 class CubebAudioStream final : public AudioStream
@@ -9,13 +10,15 @@ public:
   CubebAudioStream();
   ~CubebAudioStream();
 
+  void SetOutputVolume(u32 volume) override;
+
 protected:
   bool IsOpen() const { return m_cubeb_stream != nullptr; }
 
   bool OpenDevice() override;
   void PauseDevice(bool paused) override;
   void CloseDevice() override;
-  void BufferAvailable() override;
+  void FramesAvailable() override;
 
   void DestroyContext();
 
@@ -26,6 +29,7 @@ protected:
   cubeb* m_cubeb_context = nullptr;
   cubeb_stream* m_cubeb_stream = nullptr;
   bool m_paused = true;
+  std::atomic_bool m_output_volume_changed{ false };
 
 #ifdef WIN32
   bool m_com_initialized_by_us = false;