Update linux capture module

screen_capture/linux/x11_session_impl.h

@@ -0,0 +1,45 @@
+#ifndef _WGC_SESSION_IMPL_H_
+#define _WGC_SESSION_IMPL_H_
+
+#include <mutex>
+#include <thread>
+
+#include "x11_session.h"
+
+class X11SessionImpl : public X11Session {
+ public:
+  X11SessionImpl();
+  ~X11SessionImpl() override;
+
+ public:
+  void Release() override;
+
+  int Initialize() override;
+
+  void RegisterObserver(x11_session_observer *observer) override;
+
+  int Start() override;
+  int Stop() override;
+
+  int Pause() override;
+  int Resume() override;
+
+ private:
+  void OnFrame();
+  void OnClosed();
+
+  int Initialize();
+  void CleanUp();
+
+  // void message_func();
+
+ private:
+  std::mutex lock_;
+  bool is_initialized_ = false;
+  bool is_running_ = false;
+  bool is_paused_ = false;
+
+  x11_session_observer *observer_ = nullptr;
+};
+
+#endif