diff --git a/automotive/occupant_awareness/aidl/Android.bp b/automotive/occupant_awareness/aidl/Android.bp
new file mode 100644
index 0000000..6e9e8aa
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/Android.bp
@@ -0,0 +1,13 @@
+aidl_interface {
+    name: "android.hardware.automotive.occupant_awareness",
+    vendor_available: true,
+    srcs: [
+        "android/hardware/automotive/occupant_awareness/*.aidl",
+    ],
+    stability: "vintf",
+    backend: {
+        java: {
+            enabled: false,
+        },
+    }
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/ConfidenceLevel.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/ConfidenceLevel.aidl
new file mode 100644
index 0000000..8597ddb
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/ConfidenceLevel.aidl
@@ -0,0 +1,40 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+@VintfStability
+@Backing(type="byte")
+enum ConfidenceLevel {
+    /**
+     * No prediction could be made.
+     */
+    NONE,
+    /**
+     * Best-guess, low-confidence prediction. Predictions exceeding this threshold are adequate
+     * for non-critical applications.
+     */
+    LOW,
+    /**
+     * High-confidence prediction. Predictions exceeding this threshold are adequate for
+     * applications that require reliable predictions.
+     */
+    HIGH,
+    /**
+     * Highest confidence rate achievable.
+     */
+    MAX,
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/DriverMonitoringDetection.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/DriverMonitoringDetection.aidl
new file mode 100644
index 0000000..f5cc9d5
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/DriverMonitoringDetection.aidl
@@ -0,0 +1,36 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+import android.hardware.automotive.occupant_awareness.ConfidenceLevel;
+
+@VintfStability
+parcelable DriverMonitoringDetection {
+    /*
+     * Confidence of the computed attention data.
+     */
+    ConfidenceLevel confidenceScore;
+    /*
+     * Is the driver currently looking on-road?
+     */
+    boolean isLookingOnRoad;
+    /*
+     * Duration the driver has been looking on or off road, in milliseconds.
+     */
+    long gazeDurationMillis;
+}
+
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/GazeDetection.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/GazeDetection.aidl
new file mode 100644
index 0000000..fc36e13
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/GazeDetection.aidl
@@ -0,0 +1,57 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+import android.hardware.automotive.occupant_awareness.VehicleRegion;
+import android.hardware.automotive.occupant_awareness.ConfidenceLevel;
+
+@VintfStability
+parcelable GazeDetection {
+    /*
+     * Confidence level for the gaze detection.
+     */
+    ConfidenceLevel gazeConfidence;
+    /*
+     * Head position, in millimeters. The vehicle coordinate system is specified in the cabin space
+     * configuration. headPosition is double[3] array.
+     */
+    double[] headPosition;
+    /*
+     * Unit vector for the head pose direction. The vehicle coordinate system is specified in the
+     * cabin space configuration. headAngleUnitVector is double[3] array.
+     */
+    double[] headAngleUnitVector;
+    /*
+     * Unit vector for the gaze direction. The vehicle coordinate system is specified in the cabin
+     * space configuration. gazeAngleUnitVector is double[3] array.
+     */
+    double[] gazeAngleUnitVector;
+    /*
+     * Current gaze target.
+     */
+    VehicleRegion gazeTarget;
+    /*
+     * Custom gaze target string. This only need to be populated when gazeTarget is CUSTOM_TARGET.
+     * Vendors should use "com.vendor_name.target_name" format to avoid name collision with other
+     * vendors.
+     */
+    String customGazeTarget;
+    /*
+     * Duration that the subject has been looking at the current gaze target in milliseconds.
+     */
+    long timeOnTargetMillis;
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/IOccupantAwareness.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/IOccupantAwareness.aidl
new file mode 100644
index 0000000..86d9e2f
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/IOccupantAwareness.aidl
@@ -0,0 +1,88 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+import android.hardware.automotive.occupant_awareness.OccupantAwarenessStatus;
+import android.hardware.automotive.occupant_awareness.Role;
+import android.hardware.automotive.occupant_awareness.IOccupantAwarenessClientCallback;
+import android.hardware.automotive.occupant_awareness.OccupantDetections;
+
+@VintfStability
+interface IOccupantAwareness {
+    /*
+     * System not able to generate any occupancy awareness.
+     */
+    const int CAP_NONE = 0;
+    /*
+     * System is able to detect the presence of humans.
+     */
+    const int CAP_PRESENSE_DETECTION = 1 << 0;
+    /*
+     * System is able to detect the gaze of humans.
+     */
+    const int CAP_GAZE_DETECTION = 1 << 1;
+    /*
+     * System is able to compute the attention details of humans.
+     */
+    const int CAP_DRIVER_MONITORING_DETECTION = 1 << 2;
+
+    /**
+     * Starts the occupant awareness detection system. This is a non-blocking function call.
+     * Once system is ready, state will be modified. State update can be inrquired using callback
+     * or getState() function.
+     * @return status is the current system state.
+     */
+    OccupantAwarenessStatus startDetection();
+
+    /**
+     * Stops the occupant awareness detection system. This is a non-blocking function call.
+     * Once system is reset, state will be modified. State update can be inrquired using callback
+     * or getState() function.
+     * @return status is the current system state.
+     */
+    OccupantAwarenessStatus stopDetection();
+
+    /**
+     * Returns list of Awareness Capability supported for the given type of occupants.
+     *
+     * @param out Bitwise OR of supported capabilities (CAP_* mask).
+     */
+    int getCapabilityForRole(in Role occupantRole);
+
+    /**
+     * Inquires the current state of the occupant awareness system.
+     * @param occupantRole specifies the role of occupants of interest.
+     * @param detectionCapability specifies a single detection capability (CAP_* ) of interest.
+     *
+     * @return status is the current system state.
+     */
+    OccupantAwarenessStatus getState(in Role occupantRole, in int detectionCapability);
+
+    /**
+     * Registers a callback for data streaming. Only single callback is supported. setCallback()
+     *        should replace existing callback with new callback.
+     * @return: returns ok if successful.
+     */
+    void setCallback(in IOccupantAwarenessClientCallback callback);
+
+    /**
+     * Returns the most recent set of detections.
+     * @param OccupantDetections output detections.
+     * @return returns ok if successful.
+     */
+    void getLatestDetection(out OccupantDetections detections);
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/IOccupantAwarenessClientCallback.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/IOccupantAwarenessClientCallback.aidl
new file mode 100644
index 0000000..69f7b0b
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/IOccupantAwarenessClientCallback.aidl
@@ -0,0 +1,38 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+import android.hardware.automotive.occupant_awareness.OccupantAwarenessStatus;
+import android.hardware.automotive.occupant_awareness.OccupantDetections;
+
+@VintfStability
+interface IOccupantAwarenessClientCallback {
+    /**
+     * A callback invoked when the system status changes.
+     *
+     * @param detectionFlags The detection subsystem(s) whose status has changed.
+     * @param status The new system status.
+     */
+    oneway void onSystemStatusChanged(in int detectionFlags, in OccupantAwarenessStatus status);
+
+    /**
+     * A callback invoked when a new set of detections are available.
+     *
+     * @param detections Occupant detections.
+     */
+    oneway void onDetectionEvent(in OccupantDetections detections);
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantAwarenessStatus.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantAwarenessStatus.aidl
new file mode 100644
index 0000000..6a3453d
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantAwarenessStatus.aidl
@@ -0,0 +1,41 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+@VintfStability
+@Backing(type="byte")
+enum OccupantAwarenessStatus {
+    /*
+     * System is online and ready to serve requests.
+     */
+    READY = 0,
+    /**
+     * Detection is not supported in this vehicle due to a permanent lack of capabilities. Clients
+     * need not retry.
+     */
+    NOT_SUPPORTED = 1,
+    /*
+     * The system has not yet been initialized. No requests can be served until the
+     * initialization process completes. This state does not indicate any error and
+     * clients should retry later.
+     */
+    NOT_INITIALIZED = 2,
+    /*
+     * A permanent failure has occurred. No detections will be provided.
+     */
+    FAILURE = 3,
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantDetection.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantDetection.aidl
new file mode 100644
index 0000000..47ca35a
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantDetection.aidl
@@ -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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+import android.hardware.automotive.occupant_awareness.Role;
+import android.hardware.automotive.occupant_awareness.PresenceDetection;
+import android.hardware.automotive.occupant_awareness.GazeDetection;
+import android.hardware.automotive.occupant_awareness.DriverMonitoringDetection;
+
+/*
+ * A complete detection for a single occupant in the vehicle. Includes data about the subject's
+ * presence in the vehicle, gaze and attention.
+ */
+ @VintfStability
+parcelable OccupantDetection {
+    /*
+     * Role of the occupant (e.g., driver, passenger).
+     */
+    Role role;
+    /*
+     * Occupant presence state for a single occupant.
+     * If the vector is empty, no data could be generated.
+     */
+    PresenceDetection[] presenceData;
+    /*
+     * Gaze data for a single occupant.
+     * If the vector is empty, no data could be generated.
+     */
+    GazeDetection[] gazeData;
+    /*
+     * Attention data for a single occupant.
+     * If the vector is empty, no data could be generated.
+     */
+    DriverMonitoringDetection[] attentionData;
+}
+
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantDetections.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantDetections.aidl
new file mode 100644
index 0000000..e8f6621
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/OccupantDetections.aidl
@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+import android.hardware.automotive.occupant_awareness.OccupantDetection;
+
+@VintfStability
+parcelable OccupantDetections {
+    /**
+     * Timestamp that the underlying source image was captured, in milliseconds since Jan 1, 1970
+     * (Unix time).
+     */
+    long timeStampMillis;
+    /**
+     * A vector of detections for all occupants in the vehicle. One OccupantDetection will be
+     * generated per detected face.
+     */
+    OccupantDetection[] detections;
+}
+
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/PresenceDetection.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/PresenceDetection.aidl
new file mode 100644
index 0000000..a018106
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/PresenceDetection.aidl
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+@VintfStability
+parcelable PresenceDetection {
+    /*
+     * Boolean representing whether an occupant was detected.
+     */
+    boolean isOccupantDetected;
+    /**
+     * Duration that a particular occupant has been continuously
+     * detected, in milliseconds. Will be zero duration if the occupant is not
+     * currently detected.
+     */
+    long detectionDurationMillis;
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/Role.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/Role.aidl
new file mode 100644
index 0000000..42e86ad
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/Role.aidl
@@ -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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+@VintfStability
+@Backing(type="int")
+enum Role {
+    /*
+     * All valid role(s) must have at least 1 bit set.
+     */
+    INVALID = 0,
+    /*
+     * System could not determine role for this occupant.
+     */
+    UNKNOWN = 1 << 0,
+    /*
+     * Occupants that the system detects as front seat passengers.
+     */
+    FRONT_PASSENGER = 1 << 1,
+    /*
+     * Occupants that the system detects as driver(s).
+     */
+    DRIVER = 1 << 2,
+    /*
+     * Occupants on left seat of row 2.
+     */
+    ROW_2_PASSENGER_LEFT = 1 << 3,
+    /*
+     * Occupants on center seat of row 2.
+     */
+    ROW_2_PASSENGER_CENTER = 1 << 4,
+    /*
+     * Occupants on right seat of row 2.
+     */
+    ROW_2_PASSENGER_RIGHT = 1 << 5,
+    /*
+     * Occupants on left seat of row 3.
+     */
+    ROW_3_PASSENGER_LEFT = 1 << 6,
+    /*
+     * Occupants on center seat of row 3.
+     */
+    ROW_3_PASSENGER_CENTER = 1 << 7,
+    /*
+     * Occupants on right seat of row 3.
+     */
+    ROW_3_PASSENGER_RIGHT = 1 << 8,
+
+    /*
+     * Occupants that the system detects as front seat occupant.
+     * FRONT_OCCUPANTS = DRIVER | FRONT_PASSENGER
+     */
+    FRONT_OCCUPANTS = 1 << 1 | 1 << 2,
+    /*
+     * Occupants of row 2.
+     * ROW_2_OCCUPANTS = ROW_2_PASSENGER_LEFT | ROW_2_PASSENGER_CENTER | ROW_2_PASSENGER_RIGHT
+     */
+    ROW_2_OCCUPANTS = 1 << 3 | 1 << 4 | 1 << 5,
+    /*
+     * Occupants of row 3.
+     * ROW_3_OCCUPANTS = ROW_3_PASSENGER_LEFT | ROW_3_PASSENGER_CENTER | ROW_3_PASSENGER_RIGHT
+     */
+    ROW_3_OCCUPANTS = 1 << 6 | 1 << 7 | 1 << 8,
+    /*
+     * All the occupants in the vehicle.
+     * ALL_OCCUPANTS = UNKNOWN | FRONT_OCCUPANTS | ROW_2_OCCUPANTS | ROW_3_OCCUPANTS
+     */
+    ALL_OCCUPANTS = 0x1FF,
+}
diff --git a/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/VehicleRegion.aidl b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/VehicleRegion.aidl
new file mode 100644
index 0000000..9ee9d52
--- /dev/null
+++ b/automotive/occupant_awareness/aidl/android/hardware/automotive/occupant_awareness/VehicleRegion.aidl
@@ -0,0 +1,39 @@
+/*
+ * 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.
+ */
+
+package android.hardware.automotive.occupant_awareness;
+
+@VintfStability
+@Backing(type="int")
+enum VehicleRegion {
+    /*
+     * List of targets in the car.
+     */
+    UNKNOWN = 0,
+    INSTRUMENT_CLUSTER = 1,
+    REAR_VIEW_MIRROR = 2,
+    LEFT_SIDE_MIRROR = 3,
+    RIGHT_SIDE_MIRROR = 4,
+    FORWARD_ROADWAY = 5,
+    LEFT_ROADWAY = 6,
+    RIGHT_ROADWAY = 7,
+    HEAD_UNIT_DISPLAY = 8,
+    /*
+     * Vendors can use this value along with customGazeTarget string to uniquely identify their
+     * custom region.
+     */
+    CUSTOM_TARGET = 200,
+}