diff --git a/automotive/occupant_awareness/aidl/mock/Android.bp b/automotive/occupant_awareness/aidl/mock/Android.bp
new file mode 100644
index 0000000..4b30866
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/mock/Android.bp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+cc_binary {
+    name: "android.hardware.automotive.occupant_awareness@1.0-service_mock",
+    relative_install_path: "hw",
+    vendor: true,
+    srcs: [
+        "service.cpp",
+        "OccupantAwareness.cpp",
+        "DetectionGenerator.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder_ndk",
+        "libutils",
+        "android.hardware.automotive.occupant_awareness-ndk_platform",
+    ],
+}
diff --git a/automotive/occupant_awareness/aidl/mock/DetectionGenerator.cpp b/automotive/occupant_awareness/aidl/mock/DetectionGenerator.cpp
new file mode 100644
index 0000000..79d4dbc
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/mock/DetectionGenerator.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include <utils/SystemClock.h>
+
+#include "DetectionGenerator.h"
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace occupant_awareness {
+namespace V1_0 {
+namespace implementation {
+
+using ::aidl::android::hardware::automotive::occupant_awareness::ConfidenceLevel;
+using ::aidl::android::hardware::automotive::occupant_awareness::DriverMonitoringDetection;
+using ::aidl::android::hardware::automotive::occupant_awareness::OccupantDetection;
+using ::aidl::android::hardware::automotive::occupant_awareness::PresenceDetection;
+
+static int64_t kNanoSecondsPerMilliSecond = 1000 * 1000;
+
+OccupantDetections DetectionGenerator::GetNextDetections() {
+    OccupantDetections detections;
+    detections.timeStampMillis = android::elapsedRealtimeNano() / kNanoSecondsPerMilliSecond;
+    int remainingRoles = getSupportedRoles();
+    while (remainingRoles) {
+        int currentRole = remainingRoles & (~(remainingRoles - 1));
+        remainingRoles = remainingRoles & (remainingRoles - 1);
+
+        OccupantDetection occupantDetection;
+        occupantDetection.role = static_cast<Role>(currentRole);
+
+        // Add presence detection object for this occupant.
+        PresenceDetection presenceDetection;
+        presenceDetection.isOccupantDetected = true;
+        presenceDetection.detectionDurationMillis = detections.timeStampMillis;
+        occupantDetection.presenceData.emplace_back(presenceDetection);
+
+        if (occupantDetection.role == Role::DRIVER) {
+            // Add driver monitoring detection object for this occupant.
+            DriverMonitoringDetection driverMonitoringDetection;
+            driverMonitoringDetection.confidenceScore = ConfidenceLevel::HIGH;
+            driverMonitoringDetection.isLookingOnRoad = 0;
+            driverMonitoringDetection.gazeDurationMillis = detections.timeStampMillis;
+            occupantDetection.attentionData.emplace_back(driverMonitoringDetection);
+        }
+
+        detections.detections.emplace_back(occupantDetection);
+    }
+    return detections;
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace occupant_awareness
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
diff --git a/automotive/occupant_awareness/aidl/mock/DetectionGenerator.h b/automotive/occupant_awareness/aidl/mock/DetectionGenerator.h
new file mode 100644
index 0000000..0884685
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/mock/DetectionGenerator.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/automotive/occupant_awareness/BnOccupantAwareness.h>
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace occupant_awareness {
+namespace V1_0 {
+namespace implementation {
+
+using ::aidl::android::hardware::automotive::occupant_awareness::BnOccupantAwareness;
+using ::aidl::android::hardware::automotive::occupant_awareness::OccupantDetections;
+using ::aidl::android::hardware::automotive::occupant_awareness::Role;
+
+class DetectionGenerator {
+  public:
+    static int getSupportedRoles() {
+        return static_cast<int>(Role::DRIVER) | static_cast<int>(Role::FRONT_PASSENGER);
+    }
+    static int getSupportedCapabilities() {
+        return static_cast<int>(BnOccupantAwareness::CAP_PRESENCE_DETECTION) |
+               static_cast<int>(BnOccupantAwareness::CAP_DRIVER_MONITORING_DETECTION);
+    }
+
+    OccupantDetections GetNextDetections();
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace occupant_awareness
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
diff --git a/automotive/occupant_awareness/aidl/mock/OccupantAwareness.cpp b/automotive/occupant_awareness/aidl/mock/OccupantAwareness.cpp
new file mode 100644
index 0000000..910760a
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/mock/OccupantAwareness.cpp
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include <utils/SystemClock.h>
+
+#include "OccupantAwareness.h"
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace occupant_awareness {
+namespace V1_0 {
+namespace implementation {
+
+using ndk::ScopedAStatus;
+
+static const int32_t kAllCapabilities = OccupantAwareness::CAP_PRESENCE_DETECTION |
+                                        OccupantAwareness::CAP_GAZE_DETECTION |
+                                        OccupantAwareness::CAP_DRIVER_MONITORING_DETECTION;
+
+constexpr int64_t kNanoSecondsPerMilliSecond = 1000 * 1000;
+
+ScopedAStatus OccupantAwareness::startDetection(OccupantAwarenessStatus* status) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    if (mStatus != OccupantAwarenessStatus::NOT_INITIALIZED) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    mStatus = OccupantAwarenessStatus::READY;
+    mWorkerThread = std::thread(startWorkerThread, this);
+    if (mCallback) {
+        mCallback->onSystemStatusChanged(kAllCapabilities, mStatus);
+    }
+
+    *status = mStatus;
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus OccupantAwareness::stopDetection(OccupantAwarenessStatus* status) {
+    std::lock_guard<std::mutex> lock(mMutex);
+    if (mStatus != OccupantAwarenessStatus::READY) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    mStatus = OccupantAwarenessStatus::NOT_INITIALIZED;
+    mWorkerThread.join();
+    if (mCallback) {
+        mCallback->onSystemStatusChanged(kAllCapabilities, mStatus);
+    }
+
+    *status = mStatus;
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus OccupantAwareness::getCapabilityForRole(Role occupantRole, int32_t* capabilities) {
+    if (!isValidRole(occupantRole)) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    int intVal = static_cast<int>(occupantRole);
+    if ((intVal & DetectionGenerator::getSupportedRoles()) == intVal) {
+        int capabilities_ = DetectionGenerator::getSupportedCapabilities();
+        if (occupantRole != Role::DRIVER) {
+            capabilities_ &= ~CAP_DRIVER_MONITORING_DETECTION;
+        }
+        *capabilities = capabilities_;
+    } else {
+        *capabilities = 0;
+    }
+
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus OccupantAwareness::getState(Role occupantRole, int detectionCapability,
+                                          OccupantAwarenessStatus* status) {
+    if (!isValidRole(occupantRole)) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    if (!isValidDetectionCapabilities(detectionCapability) ||
+        !isSingularCapability(detectionCapability)) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    int roleVal = static_cast<int>(occupantRole);
+
+    if (((roleVal & DetectionGenerator::getSupportedRoles()) != roleVal) ||
+        ((detectionCapability & DetectionGenerator::getSupportedCapabilities()) !=
+         detectionCapability)) {
+        *status = OccupantAwarenessStatus::NOT_SUPPORTED;
+        return ScopedAStatus::ok();
+    }
+
+    std::lock_guard<std::mutex> lock(mMutex);
+    *status = mStatus;
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus OccupantAwareness::setCallback(
+        const std::shared_ptr<IOccupantAwarenessClientCallback>& callback) {
+    if (callback == nullptr) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    std::lock_guard<std::mutex> lock(mMutex);
+    mCallback = callback;
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus OccupantAwareness::getLatestDetection(OccupantDetections* detections) {
+    std::lock_guard<std::mutex> lock(mMutex);
+
+    if (mStatus != OccupantAwarenessStatus::READY) {
+        return ScopedAStatus::fromExceptionCode(EX_TRANSACTION_FAILED);
+    }
+
+    *detections = mLatestDetections;
+    return ScopedAStatus::ok();
+}
+
+bool OccupantAwareness::isValidRole(Role occupantRole) {
+    int intVal = static_cast<int>(occupantRole);
+    int allOccupants = static_cast<int>(Role::ALL_OCCUPANTS);
+    return (occupantRole != Role::INVALID) && ((intVal & (~allOccupants)) == 0);
+}
+
+bool OccupantAwareness::isValidDetectionCapabilities(int detectionCapabilities) {
+    return (detectionCapabilities != OccupantAwareness::CAP_NONE) &&
+           ((detectionCapabilities & (~kAllCapabilities)) == 0);
+}
+
+bool OccupantAwareness::isSingularCapability(int detectionCapability) {
+    // Check whether the value is 0, or the value has only one bit set.
+    return (detectionCapability & (detectionCapability - 1)) == 0;
+}
+
+void OccupantAwareness::startWorkerThread(OccupantAwareness* occupantAwareness) {
+    occupantAwareness->workerThreadFunction();
+}
+
+void OccupantAwareness::workerThreadFunction() {
+    bool isFirstDetection = true;
+    int64_t prevDetectionTimeMs;
+    while (mStatus == OccupantAwarenessStatus::READY) {
+        int64_t currentTimeMs = android::elapsedRealtimeNano() / kNanoSecondsPerMilliSecond;
+        if ((isFirstDetection) || (currentTimeMs - prevDetectionTimeMs > mDetectionDurationMs)) {
+            std::lock_guard<std::mutex> lock(mMutex);
+            mLatestDetections = mGenerator.GetNextDetections();
+            if (mCallback != nullptr) {
+                mCallback->onDetectionEvent(mLatestDetections);
+            }
+            isFirstDetection = false;
+            prevDetectionTimeMs = currentTimeMs;
+        }
+    }
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace occupant_awareness
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
diff --git a/automotive/occupant_awareness/aidl/mock/OccupantAwareness.h b/automotive/occupant_awareness/aidl/mock/OccupantAwareness.h
new file mode 100644
index 0000000..c5f6dd6
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/mock/OccupantAwareness.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#pragma once
+
+#include <thread>
+
+#include <aidl/android/hardware/automotive/occupant_awareness/BnOccupantAwareness.h>
+#include <aidl/android/hardware/automotive/occupant_awareness/BnOccupantAwarenessClientCallback.h>
+#include <utils/StrongPointer.h>
+
+#include "DetectionGenerator.h"
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace occupant_awareness {
+namespace V1_0 {
+namespace implementation {
+
+using ::aidl::android::hardware::automotive::occupant_awareness::BnOccupantAwareness;
+using ::aidl::android::hardware::automotive::occupant_awareness::IOccupantAwarenessClientCallback;
+using ::aidl::android::hardware::automotive::occupant_awareness::OccupantAwarenessStatus;
+using ::aidl::android::hardware::automotive::occupant_awareness::OccupantDetections;
+using ::aidl::android::hardware::automotive::occupant_awareness::Role;
+
+/**
+ * The mock HAL can detect presence of Driver and front passenger, and driver awareness detection
+ * for driver.
+ **/
+class OccupantAwareness : public BnOccupantAwareness {
+  public:
+    // Methods from ::android::hardware::automotive::occupant_awareness::IOccupantAwareness
+    // follow.
+    ndk::ScopedAStatus startDetection(OccupantAwarenessStatus* status) override;
+    ndk::ScopedAStatus stopDetection(OccupantAwarenessStatus* status) override;
+    ndk::ScopedAStatus getCapabilityForRole(Role occupantRole, int32_t* capabilities) override;
+    ndk::ScopedAStatus getState(Role occupantRole, int detectionCapability,
+                                OccupantAwarenessStatus* status) override;
+    ndk::ScopedAStatus setCallback(
+            const std::shared_ptr<IOccupantAwarenessClientCallback>& callback) override;
+    ndk::ScopedAStatus getLatestDetection(OccupantDetections* detections) override;
+
+  private:
+    bool isValidRole(Role occupantRole);
+    bool isValidDetectionCapabilities(int detectionCapabilities);
+    bool isSingularCapability(int detectionCapability);
+
+    void workerThreadFunction();
+    static void startWorkerThread(OccupantAwareness* occupantAwareness);
+
+    std::mutex mMutex;
+    std::shared_ptr<IOccupantAwarenessClientCallback> mCallback = nullptr;
+    OccupantAwarenessStatus mStatus = OccupantAwarenessStatus::NOT_INITIALIZED;
+
+    OccupantDetections mLatestDetections;
+    std::thread mWorkerThread;
+
+    DetectionGenerator mGenerator;
+
+    // Generate a new detection every 1ms.
+    const int64_t mDetectionDurationMs = 1;
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace occupant_awareness
+}  // namespace automotive
+}  // namespace hardware
+}  // namespace android
diff --git a/automotive/occupant_awareness/aidl/mock/service.cpp b/automotive/occupant_awareness/aidl/mock/service.cpp
new file mode 100644
index 0000000..d8860df
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/mock/service.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2016 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_TAG "android.hardware.automotive.occupant_awareness@1.0-service_mock"
+
+#include <unistd.h>
+
+#include <android-base/logging.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+
+#include "OccupantAwareness.h"
+
+using ::aidl::android::hardware::automotive::occupant_awareness::IOccupantAwareness;
+using ::android::hardware::automotive::occupant_awareness::V1_0::implementation::OccupantAwareness;
+using ::ndk::ScopedAStatus;
+using ::ndk::SharedRefBase;
+
+const static char kOccupantAwarenessServiceName[] = "default";
+
+int main() {
+    ABinderProcess_setThreadPoolMaxThreadCount(0);
+    LOG(INFO) << "Occupant Awareness service is starting";
+    std::shared_ptr<OccupantAwareness> occupantAwareness = SharedRefBase::make<OccupantAwareness>();
+
+    const std::string instance =
+            std::string() + IOccupantAwareness::descriptor + "/" + kOccupantAwarenessServiceName;
+
+    binder_status_t status =
+            AServiceManager_addService(occupantAwareness->asBinder().get(), instance.c_str());
+    if (status == STATUS_OK) {
+        LOG(INFO) << "Service " << kOccupantAwarenessServiceName << " is ready";
+        ABinderProcess_joinThreadPool();
+    } else {
+        LOG(ERROR) << "Could not register service " << kOccupantAwarenessServiceName
+                   << ", status: " << status;
+    }
+
+    // In normal operation, we don't expect the thread pool to exit.
+    LOG(ERROR) << "Occupant Awareness service is shutting down";
+    return 1;
+}