diff --git a/media/ndk/NdkMediaDataSource.cpp b/media/ndk/NdkMediaDataSource.cpp
new file mode 100644
index 0000000..0cae6f4
--- /dev/null
+++ b/media/ndk/NdkMediaDataSource.cpp
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 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 "NdkMediaDataSource"
+
+#include "NdkMediaDataSourcePriv.h"
+
+#include <inttypes.h>
+#include <jni.h>
+#include <unistd.h>
+
+#include <binder/IServiceManager.h>
+#include <cutils/properties.h>
+#include <utils/Log.h>
+#include <utils/StrongPointer.h>
+#include <media/NdkMediaError.h>
+#include <media/NdkMediaDataSource.h>
+#include <media/stagefright/InterfaceUtils.h>
+
+#include "../../libstagefright/include/HTTPBase.h"
+#include "../../libstagefright/include/NuCachedSource2.h"
+
+using namespace android;
+
+struct AMediaDataSource {
+    void *userdata;
+    AMediaDataSourceReadAt readAt;
+    AMediaDataSourceGetSize getSize;
+};
+
+NdkDataSource::NdkDataSource(AMediaDataSource *dataSource)
+    : mDataSource(dataSource) {
+}
+
+status_t NdkDataSource::initCheck() const {
+    return OK;
+}
+
+ssize_t NdkDataSource::readAt(off64_t offset, void *data, size_t size) {
+    Mutex::Autolock l(mLock);
+    if (mDataSource->getSize == NULL || mDataSource->userdata == NULL) {
+        return -1;
+    }
+    return mDataSource->readAt(mDataSource->userdata, offset, data, size);
+}
+
+status_t NdkDataSource::getSize(off64_t *size) {
+    Mutex::Autolock l(mLock);
+    if (mDataSource->getSize == NULL || mDataSource->userdata == NULL) {
+        return NO_INIT;
+    }
+    if (size != NULL) {
+        *size = mDataSource->getSize(mDataSource->userdata);
+    }
+    return OK;
+}
+
+String8 NdkDataSource::toString() {
+    return String8::format("NdkDataSource(pid %d, uid %d)", getpid(), getuid());
+}
+
+String8 NdkDataSource::getMIMEType() const {
+    return String8("application/octet-stream");
+}
+
+extern "C" {
+
+EXPORT
+AMediaDataSource* AMediaDataSource_new() {
+    AMediaDataSource *mSource = new AMediaDataSource();
+    mSource->userdata = NULL;
+    mSource->readAt = NULL;
+    mSource->getSize = NULL;
+    return mSource;
+}
+
+EXPORT
+void AMediaDataSource_delete(AMediaDataSource *mSource) {
+    ALOGV("dtor");
+    if (mSource != NULL) {
+        delete mSource;
+    }
+}
+
+EXPORT
+void AMediaDataSource_setUserdata(AMediaDataSource *mSource, void *userdata) {
+    mSource->userdata = userdata;
+}
+
+EXPORT
+void AMediaDataSource_setReadAt(AMediaDataSource *mSource, AMediaDataSourceReadAt readAt) {
+    mSource->readAt = readAt;
+}
+
+EXPORT
+void AMediaDataSource_setGetSize(AMediaDataSource *mSource, AMediaDataSourceGetSize getSize) {
+    mSource->getSize = getSize;
+}
+
+} // extern "C"
+