Add missing nostalgia directory level in src tree

src/nostalgia/core/gba/media.cpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2016-2017 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <ox/fs/filesystem.hpp>
+#include <ox/std/std.hpp>
+#include "addresses.hpp"
+#include "media.hpp"
+
+namespace nostalgia {
+namespace core {
+
+uint8_t *findMedia() {
+	// put the header in the wrong order to prevent mistaking this code for the
+	// media section
+	const static auto headerP2 = "_HEADER_________";
+	const static auto headerP1 = "NOSTALGIA_MEDIA";
+	const static auto headerP1Len = 15;
+	const static auto headerP2Len = 16;
+	const static auto headerLen = headerP1Len + headerP2Len + 1;
+
+	for (auto current = &MEM_ROM; current < ((uint8_t*) 0x0a000000); current += headerLen) {
+		if (ox_memcmp(current, headerP1, headerP1Len) == 0 &&
+		    ox_memcmp(current + headerP1Len, headerP2, headerP2Len) == 0) {
+			return current + headerLen;
+		}
+	}
+	return 0;
+}
+
+}
+}