Peng Xu | 1a00e2d | 2017-09-27 23:08:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_SENSOR_DEVICE_UTIL |
| 18 | #define ANDROID_SENSOR_DEVICE_UTIL |
| 19 | |
| 20 | #include <android/hidl/manager/1.0/IServiceNotification.h> |
Anthony Stange | 1292486 | 2020-03-20 10:46:15 -0400 | [diff] [blame] | 21 | #include <hardware/sensors.h> |
Anthony Stange | 5945eb3 | 2020-08-06 12:45:16 -0400 | [diff] [blame] | 22 | #include <utils/Log.h> |
Peng Xu | 1a00e2d | 2017-09-27 23:08:30 -0700 | [diff] [blame] | 23 | |
Anthony Stange | 1292486 | 2020-03-20 10:46:15 -0400 | [diff] [blame] | 24 | #include <cmath> |
Peng Xu | 1a00e2d | 2017-09-27 23:08:30 -0700 | [diff] [blame] | 25 | #include <condition_variable> |
| 26 | #include <thread> |
| 27 | |
| 28 | using ::android::hardware::hidl_string; |
| 29 | using ::android::hardware::Return; |
| 30 | using ::android::hidl::manager::V1_0::IServiceNotification; |
| 31 | |
| 32 | namespace android { |
| 33 | namespace SensorDeviceUtils { |
| 34 | |
Brian Duddie | 3dd8502 | 2021-04-27 17:18:00 -0700 | [diff] [blame^] | 35 | // Quantizes a single value to (a fractional factor of) a sensor's resolution. Typically we |
| 36 | // increase the value of the sensor's nominal resolution to ensure that sensor accuracy |
| 37 | // improvements, like runtime calibration, are not masked during requantization. |
| 38 | inline void quantizeValue(float *value, double resolution, double factor = 0.125) { |
Anthony Stange | 5945eb3 | 2020-08-06 12:45:16 -0400 | [diff] [blame] | 39 | if (resolution == 0) { |
| 40 | return; |
| 41 | } |
| 42 | |
Brian Duddie | 3dd8502 | 2021-04-27 17:18:00 -0700 | [diff] [blame^] | 43 | double incRes = factor * resolution; |
Anthony Stange | 1292486 | 2020-03-20 10:46:15 -0400 | [diff] [blame] | 44 | *value = round(static_cast<double>(*value) / incRes) * incRes; |
| 45 | } |
| 46 | |
| 47 | // Ensures a sensor event doesn't provide values finer grained than its sensor resolution allows. |
| 48 | void quantizeSensorEventValues(sensors_event_t *event, float resolution); |
| 49 | |
Anthony Stange | 5945eb3 | 2020-08-06 12:45:16 -0400 | [diff] [blame] | 50 | // Returns the expected resolution value for the given sensor |
| 51 | float resolutionForSensor(const sensor_t &sensor); |
Anthony Stange | 1292486 | 2020-03-20 10:46:15 -0400 | [diff] [blame] | 52 | |
Peng Xu | 1a00e2d | 2017-09-27 23:08:30 -0700 | [diff] [blame] | 53 | class HidlServiceRegistrationWaiter : public IServiceNotification { |
| 54 | public: |
| 55 | |
| 56 | HidlServiceRegistrationWaiter(); |
| 57 | |
| 58 | Return<void> onRegistration(const hidl_string &fqName, |
| 59 | const hidl_string &name, |
| 60 | bool preexisting) override; |
| 61 | |
| 62 | void reset(); |
| 63 | |
| 64 | /** |
| 65 | * Wait for service restart |
| 66 | * |
| 67 | * @return true if service is restart since last reset(); false otherwise. |
| 68 | */ |
| 69 | bool wait(); |
Yifan Hong | a53e89d | 2017-11-02 16:19:19 -0700 | [diff] [blame] | 70 | protected: |
| 71 | void onFirstRef() override; |
Peng Xu | 1a00e2d | 2017-09-27 23:08:30 -0700 | [diff] [blame] | 72 | private: |
Martijn Coenen | b41e87a | 2017-11-02 14:00:41 +0100 | [diff] [blame] | 73 | bool mRegistered; |
Peng Xu | 1a00e2d | 2017-09-27 23:08:30 -0700 | [diff] [blame] | 74 | |
| 75 | std::mutex mLock; |
| 76 | std::condition_variable mCondition; |
| 77 | bool mRestartObserved; |
| 78 | }; |
| 79 | |
| 80 | } // namespace SensorDeviceUtils |
| 81 | } // namespace android; |
| 82 | |
| 83 | #endif // ANDROID_SENSOR_SERVICE_UTIL |