Add a TitleDatabase

Add a TitleDatabase to allow easily querying a title database to get
a user-friendly string for a game ID.

Source/Core/Core/TitleDatabase.h

@@ -0,0 +1,38 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+#include <unordered_map>
+
+#include "Common/CommonTypes.h"
+
+namespace Core
+{
+// Reader for title database files.
+class TitleDatabase final
+{
+public:
+  TitleDatabase();
+  ~TitleDatabase();
+
+  enum class TitleType
+  {
+    Channel,
+    Other,
+  };
+
+  // Get a user friendly title name for a game ID.
+  // This falls back to returning an empty string if none could be found.
+  std::string GetTitleName(const std::string& game_id, TitleType = TitleType::Other) const;
+
+  // Get a description for a game ID (title name if available + game ID).
+  std::string Describe(const std::string& game_id, TitleType = TitleType::Other) const;
+
+private:
+  std::unordered_map<std::string, std::string> m_wii_title_map;
+  std::unordered_map<std::string, std::string> m_gc_title_map;
+};
+}  // namespace Core