Update linux capture module

screen_capture/linux/x11_session_impl.cpp

@@ -0,0 +1,51 @@
+#include "x11_session_impl.h"
+
+#include <atomic>
+#include <functional>
+#include <iostream>
+#include <memory>
+
+#define CHECK_INIT                            \
+  if (!is_initialized_) {                     \
+    std::cout << "AE_NEED_INIT" << std::endl; \
+    return 4;                                 \
+  }
+
+X11SessionImpl::X11SessionImpl() {}
+
+X11SessionImpl::~X11SessionImpl() {
+  Stop();
+  CleanUp();
+}
+
+void X11SessionImpl::Release() { delete this; }
+
+int X11SessionImpl::Initialize() {}
+
+void X11SessionImpl::RegisterObserver(x11_session_observer *observer) {
+  observer_ = observer;
+}
+
+int X11SessionImpl::Start() {
+  if (is_running_) return 0;
+
+  int error = 1;
+
+  CHECK_INIT;
+
+  return error;
+}
+
+int X11SessionImpl::Stop() { return 0; }
+
+int X11SessionImpl::Pause() {}
+
+int X11SessionImpl::Resume() {}
+
+void X11SessionImpl::OnFrame() {}
+
+void X11SessionImpl::OnClosed() {}
+
+int X11SessionImpl::Initialize() { return 0; }
+
+void X11SessionImpl::CleanUp() {}