/* * 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 template class SensorEventsChecker { public: virtual bool check(const std::vector& events, std::string* out) const = 0; virtual ~SensorEventsChecker() {} }; template class NullChecker : public SensorEventsChecker { public: virtual bool check(const std::vector&, std::string*) const { return true; } }; template class SensorEventPerEventChecker : public SensorEventsChecker { public: virtual bool checkEvent(const EventType& event, std::string* out) const = 0; virtual bool check(const std::vector& events, std::string* out) const { for (const auto& e : events) { if (!checkEvent(e, out)) { return false; } } return true; } }; template class Vec3NormChecker : public SensorEventPerEventChecker { public: Vec3NormChecker(float min, float max) : mLowerLimit(min), mUpperLimit(max) {} static Vec3NormChecker byNominal(float nominal, float allowedError) { return Vec3NormChecker(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