diff --git a/services/oboeservice/AAudioClientTracker.h b/services/oboeservice/AAudioClientTracker.h
new file mode 100644
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+++ b/services/oboeservice/AAudioClientTracker.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2017 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_AAUDIO_AAUDIO_CLIENT_TRACKER_H
+#define ANDROID_AAUDIO_AAUDIO_CLIENT_TRACKER_H
+
+#include <map>
+#include <mutex>
+#include <set>
+
+#include <utils/Singleton.h>
+
+#include <aaudio/AAudio.h>
+#include "binding/IAAudioClient.h"
+#include "AAudioService.h"
+
+namespace aaudio {
+
+class AAudioClientTracker : public android::Singleton<AAudioClientTracker>{
+public:
+    AAudioClientTracker();
+    ~AAudioClientTracker() = default;
+
+    aaudio_result_t registerClient(pid_t pid, const android::sp<android::IAAudioClient>& client);
+
+    void unregisterClient(pid_t pid);
+
+    aaudio_result_t registerClientStream(pid_t pid,
+                                         android::sp<AAudioServiceStreamBase> serviceStream);
+
+    aaudio_result_t unregisterClientStream(pid_t pid,
+                                           android::sp<AAudioServiceStreamBase> serviceStream);
+
+    android::AAudioService *getAAudioService() const {
+        return mAAudioService;
+    }
+
+    void setAAudioService(android::AAudioService *aaudioService) {
+        mAAudioService = aaudioService;
+    }
+
+private:
+    class NotificationClient : public IBinder::DeathRecipient {
+    public:
+        NotificationClient(pid_t pid);
+        virtual ~NotificationClient();
+
+        aaudio_result_t registerClientStream(android::sp<AAudioServiceStreamBase> serviceStream);
+
+        aaudio_result_t unregisterClientStream(android::sp<AAudioServiceStreamBase> serviceStream);
+
+        // IBinder::DeathRecipient
+        virtual     void    binderDied(const android::wp<IBinder>& who);
+
+    protected:
+        std::mutex                                      mLock;
+        const pid_t                                     mProcessId;
+        std::set<android::sp<AAudioServiceStreamBase>>  mStreams;
+    };
+
+    std::mutex                                       mLock;
+    std::map<pid_t, android::sp<NotificationClient>> mNotificationClients;
+    android::AAudioService                          *mAAudioService = nullptr;
+};
+
+} /* namespace aaudio */
+
+#endif //ANDROID_AAUDIO_AAUDIO_CLIENT_TRACKER_H