diff --git a/services/mediaresourcemanager/ResourceObserverService.h b/services/mediaresourcemanager/ResourceObserverService.h
new file mode 100644
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+++ b/services/mediaresourcemanager/ResourceObserverService.h
@@ -0,0 +1,95 @@
+/**
+ *
+ * Copyright 2020, 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.
+ */
+
+#ifndef ANDROID_MEDIA_RESOURCE_OBSERVER_SERVICE_H
+#define ANDROID_MEDIA_RESOURCE_OBSERVER_SERVICE_H
+
+#include <map>
+
+#include <aidl/android/media/BnResourceObserverService.h>
+#include "ResourceManagerService.h"
+
+namespace android {
+
+using Status = ::ndk::ScopedAStatus;
+using ::aidl::android::media::BnResourceObserverService;
+using ::aidl::android::media::IResourceObserver;
+using ::aidl::android::media::MediaObservableFilter;
+using ::aidl::android::media::MediaObservableParcel;
+using ::aidl::android::media::MediaObservableType;
+using ::aidl::android::media::MediaObservableEvent;
+
+class ResourceObserverService : public BnResourceObserverService {
+public:
+
+    static char const *getServiceName() { return "media.resource_observer"; }
+    static std::shared_ptr<ResourceObserverService> instantiate();
+
+    virtual inline binder_status_t dump(
+            int /*fd*/, const char** /*args*/, uint32_t /*numArgs*/);
+
+    ResourceObserverService();
+    virtual ~ResourceObserverService() {}
+
+    // IResourceObserverService interface
+    Status registerObserver(const std::shared_ptr<IResourceObserver>& in_observer,
+            const std::vector<MediaObservableFilter>& in_filters) override;
+
+    Status unregisterObserver(const std::shared_ptr<IResourceObserver>& in_observer) override;
+    // ~IResourceObserverService interface
+
+    // Called by ResourceManagerService when resources are added.
+    void onResourceAdded(int uid, int pid, const ResourceList &resources);
+
+    // Called by ResourceManagerService when resources are removed.
+    void onResourceRemoved(int uid, int pid, const ResourceList &resources);
+
+private:
+    struct ObserverInfo {
+        ::ndk::SpAIBinder binder;
+        std::shared_ptr<IResourceObserver> observer;
+        std::vector<MediaObservableFilter> filters;
+    };
+    struct DeathRecipient;
+
+    // Below maps are all keyed on the observer's binder ptr value.
+    using ObserverInfoMap = std::map<uintptr_t, ObserverInfo>;
+    using SubscriberMap = std::map<uintptr_t, std::shared_ptr<IResourceObserver>>;
+
+    std::mutex mObserverLock;
+    // Binder->ObserverInfo
+    ObserverInfoMap mObserverInfoMap GUARDED_BY(mObserverLock);
+    // Observable(<type,event>)->Subscribers
+    std::map<MediaObservableFilter, SubscriberMap> mObservableToSubscribersMap
+            GUARDED_BY(mObserverLock);
+
+    ::ndk::ScopedAIBinder_DeathRecipient mDeathRecipient;
+
+    // Binder death handling.
+    static std::mutex sDeathRecipientLock;
+    static std::map<uintptr_t, std::shared_ptr<DeathRecipient>> sDeathRecipientMap
+            GUARDED_BY(sDeathRecipientLock);
+    static void BinderDiedCallback(void* cookie);
+
+    void notifyObservers(MediaObservableEvent event,
+            int uid, int pid, const ResourceList &resources);
+};
+
+// ----------------------------------------------------------------------------
+} // namespace android
+
+#endif // ANDROID_MEDIA_RESOURCE_OBSERVER_SERVICE_H