Use factory method to create screen capturer

src/screen_capturer/screen_capturer_factory.h

@@ -0,0 +1,37 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2023-12-15
+ * Copyright (c) 2023 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _SCREEN_CAPTURER_FACTORY_H_
+#define _SCREEN_CAPTURER_FACTORY_H_
+
+#ifdef _WIN32
+
+#include "screen_capturer_wgc.h"
+#elif __linux__
+#include "screen_capturer_x11.h"
+#elif __APPLE__
+#include "screen_capturer_avf.h"
+#endif
+
+class ScreenCapturerFactory {
+ public:
+  virtual ~ScreenCapturerFactory() {}
+
+ public:
+  ScreenCapturer* Create() {
+#ifdef _WIN32
+    return new ScreenCapturerWgc();
+#elif __linux__
+    return new ScreenCapturerX11();
+#elif __APPLE__
+    return new ScreenCapturerAvf();
+#else
+    return nullptr;
+#endif
+  }
+};
+
+#endif