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diff --git a/modules/sensors/dynamic_sensor/DynamicSensorsSubHal.h b/modules/sensors/dynamic_sensor/DynamicSensorsSubHal.h
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+++ b/modules/sensors/dynamic_sensor/DynamicSensorsSubHal.h
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+/*
+ * Copyright (C) 2021 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_SENSORHAL_EXT_DYNAMIC_SENSORS_SUB_HAL_H
+#define ANDROID_SENSORHAL_EXT_DYNAMIC_SENSORS_SUB_HAL_H
+
+#include "DynamicSensorManager.h"
+
+#include <V2_1/SubHal.h>
+
+namespace android {
+namespace SensorHalExt {
+
+class DynamicSensorsSubHal :
+        public SensorEventCallback,
+        public ::android::hardware::sensors::V2_1::implementation::ISensorsSubHal {
+    using Event = ::android::hardware::sensors::V2_1::Event;
+    using hidl_handle = ::android::hardware::hidl_handle;
+    using hidl_string = ::android::hardware::hidl_string;
+    template<class T> using hidl_vec = ::android::hardware::hidl_vec<T>;
+    using IHalProxyCallback =
+        ::android::hardware::sensors::V2_1::implementation::IHalProxyCallback;
+    using OperationMode = ::android::hardware::sensors::V1_0::OperationMode;
+    using RateLevel = ::android::hardware::sensors::V1_0::RateLevel;
+    using Result = ::android::hardware::sensors::V1_0::Result;
+    template<class T> using Return = ::android::hardware::Return<T>;
+    using SharedMemInfo = ::android::hardware::sensors::V1_0::SharedMemInfo;
+
+public:
+    DynamicSensorsSubHal();
+
+    // ISensors.
+    Return<Result> setOperationMode(OperationMode mode) override;
+    Return<Result> activate(int32_t sensor_handle, bool enabled) override;
+    Return<Result> batch(int32_t sensor_handle, int64_t sampling_period_ns,
+                         int64_t max_report_latency_ns) override;
+    Return<Result> flush(int32_t sensor_handle) override;
+    Return<void> registerDirectChannel(
+            const SharedMemInfo& mem,
+            registerDirectChannel_cb callback) override;
+    Return<Result> unregisterDirectChannel(int32_t channel_handle) override;
+    Return<void> configDirectReport(
+            int32_t sensor_handle, int32_t channel_handle, RateLevel rate,
+            configDirectReport_cb callback) override;
+    Return<void> getSensorsList_2_1(getSensorsList_2_1_cb callback) override;
+    Return<Result> injectSensorData_2_1(const Event& event) override;
+    Return<void> debug(
+            const hidl_handle& handle,
+            const hidl_vec<hidl_string>& args) override;
+
+    // ISensorsSubHal.
+    const std::string getName() override { return "Dynamic-SubHAL"; }
+    Return<Result> initialize(
+            const sp<IHalProxyCallback>& hal_proxy_callback) override;
+
+    // SensorEventCallback.
+    int submitEvent(SP(BaseSensorObject) sensor,
+                    const sensors_event_t& e) override;
+
+private:
+    static constexpr int32_t kDynamicHandleBase = 1;
+    static constexpr int32_t kDynamicHandleEnd = 0x1000000;
+    static constexpr int32_t kMaxDynamicHandleCount = kDynamicHandleEnd -
+                                                      kDynamicHandleBase;
+
+    void onSensorConnected(int handle, const sensor_t* sensor_info);
+
+    std::unique_ptr<DynamicSensorManager> mDynamicSensorManager;
+    sp<IHalProxyCallback> mHalProxyCallback;
+};
+
+} // namespace SensorHalExt
+} // namespace android
+
+#endif // ANDROID_SENSORHAL_EXT_DYNAMIC_SENSORS_SUB_HAL_H
+