diff --git a/media/libmedia/DataSourceDesc.cpp b/media/libmedia/DataSourceDesc.cpp
new file mode 100644
index 0000000..b7ccbce
--- /dev/null
+++ b/media/libmedia/DataSourceDesc.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "DataSourceDesc"
+
+#include <media/DataSource.h>
+#include <media/DataSourceDesc.h>
+#include <media/MediaHTTPService.h>
+
+namespace android {
+
+static const int64_t kLongMax = 0x7ffffffffffffffL;
+
+DataSourceDesc::DataSourceDesc()
+    : mType(TYPE_NONE),
+      mFDOffset(0),
+      mFDLength(kLongMax),
+      mId(0),
+      mStartPositionMs(0),
+      mEndPositionMs(0) {
+}
+
+}  // namespace android