Common: Add a CD image hasher class

src/common/cd_image_hasher.h

@@ -0,0 +1,19 @@
+#pragma once
+#include "progress_callback.h"
+#include "types.h"
+#include <array>
+#include <string>
+
+class CDImage;
+
+namespace CDImageHasher {
+
+using Hash = std::array<u8, 16>;
+std::string HashToString(const Hash& hash);
+
+bool GetImageHash(CDImage* image, Hash* out_hash,
+                  ProgressCallback* progress_callback = ProgressCallback::NullProgressCallback);
+bool GetTrackHash(CDImage* image, u8 track, Hash* out_hash,
+                  ProgressCallback* progress_callback = ProgressCallback::NullProgressCallback);
+
+} // namespace CDImageHasher