| /* |
| * Copyright (C) 2018 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_SENSOR_EVENTS_CHECKER_H |
| #define ANDROID_SENSOR_EVENTS_CHECKER_H |
| |
| #include <cmath> |
| |
| template <class EventType> |
| class SensorEventsChecker { |
| public: |
| virtual bool check(const std::vector<EventType>& events, std::string* out) const = 0; |
| virtual ~SensorEventsChecker() {} |
| }; |
| |
| template <class EventType> |
| class NullChecker : public SensorEventsChecker<EventType> { |
| public: |
| virtual bool check(const std::vector<EventType>&, std::string*) const { return true; } |
| }; |
| |
| template <class EventType> |
| class SensorEventPerEventChecker : public SensorEventsChecker<EventType> { |
| public: |
| virtual bool checkEvent(const EventType& event, std::string* out) const = 0; |
| virtual bool check(const std::vector<EventType>& events, std::string* out) const { |
| for (const auto& e : events) { |
| if (!checkEvent(e, out)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| }; |
| |
| template <class EventType> |
| class Vec3NormChecker : public SensorEventPerEventChecker<EventType> { |
| public: |
| Vec3NormChecker(float min, float max) : mLowerLimit(min), mUpperLimit(max) {} |
| static Vec3NormChecker<EventType> byNominal(float nominal, float allowedError) { |
| return Vec3NormChecker<EventType>(nominal - allowedError, nominal + allowedError); |
| } |
| |
| virtual bool checkEvent(const EventType& event, std::string* out) const { |
| android::hardware::sensors::V1_0::Vec3 v = event.u.vec3; |
| float norm = std::sqrt(v.x * v.x + v.y * v.y + v.z * v.z); |
| if (norm < mLowerLimit || norm > mUpperLimit) { |
| if (out != nullptr) { |
| std::ostringstream ss; |
| ss << "Event @ " << event.timestamp << " (" << v.x << ", " << v.y << ", " << v.z |
| << ")" |
| << " has norm " << norm << ", which is beyond range" |
| << " [" << mLowerLimit << ", " << mUpperLimit << "]"; |
| *out = ss.str(); |
| } |
| return false; |
| } |
| return true; |
| } |
| |
| protected: |
| float mLowerLimit; |
| float mUpperLimit; |
| }; |
| |
| #endif // ANDROID_SENSOR_EVENTS_CHECKER_H |