SensorDevice.h revision 801ea093b0e923a61b832f2adba698a273479880
1/* 2 * Copyright (C) 2010 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_H 18#define ANDROID_SENSOR_DEVICE_H 19 20#include "SensorServiceUtils.h" 21 22#include <sensor/Sensor.h> 23#include <stdint.h> 24#include <sys/types.h> 25#include <utils/KeyedVector.h> 26#include <utils/Singleton.h> 27#include <utils/String8.h> 28 29#include <string> 30#include <map> 31 32#include "android/hardware/sensors/1.0/ISensors.h" 33 34// --------------------------------------------------------------------------- 35 36namespace android { 37 38// --------------------------------------------------------------------------- 39using SensorServiceUtil::Dumpable; 40 41class SensorDevice : public Singleton<SensorDevice>, public Dumpable { 42public: 43 ssize_t getSensorList(sensor_t const** list); 44 45 void handleDynamicSensorConnection(int handle, bool connected); 46 status_t initCheck() const; 47 int getHalDeviceVersion() const; 48 49 ssize_t poll(sensors_event_t* buffer, size_t count); 50 51 status_t activate(void* ident, int handle, int enabled); 52 status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs, 53 int64_t maxBatchReportLatencyNs); 54 // Call batch with timeout zero instead of calling setDelay() for newer devices. 55 status_t setDelay(void* ident, int handle, int64_t ns); 56 status_t flush(void* ident, int handle); 57 status_t setMode(uint32_t mode); 58 59 bool isDirectReportSupported() const; 60 int32_t registerDirectChannel(const sensors_direct_mem_t *memory); 61 void unregisterDirectChannel(int32_t channelHandle); 62 int32_t configureDirectChannel(int32_t sensorHandle, 63 int32_t channelHandle, const struct sensors_direct_cfg_t *config); 64 65 void disableAllSensors(); 66 void enableAllSensors(); 67 void autoDisable(void *ident, int handle); 68 69 status_t injectSensorData(const sensors_event_t *event); 70 void notifyConnectionDestroyed(void *ident); 71 72 // Dumpable 73 virtual std::string dump() const; 74private: 75 friend class Singleton<SensorDevice>; 76 77 sp<android::hardware::sensors::V1_0::ISensors> mSensors; 78 Vector<sensor_t> mSensorList; 79 std::map<int32_t, sensor_t*> mConnectedDynamicSensors; 80 81 static const nsecs_t MINIMUM_EVENTS_PERIOD = 1000000; // 1000 Hz 82 mutable Mutex mLock; // protect mActivationCount[].batchParams 83 // fixed-size array after construction 84 85 // Struct to store all the parameters(samplingPeriod, maxBatchReportLatency and flags) from 86 // batch call. For continous mode clients, maxBatchReportLatency is set to zero. 87 struct BatchParams { 88 // TODO: Get rid of flags parameter everywhere. 89 int flags; 90 nsecs_t batchDelay, batchTimeout; 91 BatchParams() : flags(0), batchDelay(0), batchTimeout(0) {} 92 BatchParams(int flag, nsecs_t delay, nsecs_t timeout): flags(flag), batchDelay(delay), 93 batchTimeout(timeout) { } 94 bool operator != (const BatchParams& other) { 95 return other.batchDelay != batchDelay || other.batchTimeout != batchTimeout || 96 other.flags != flags; 97 } 98 }; 99 100 // Store batch parameters in the KeyedVector and the optimal batch_rate and timeout in 101 // bestBatchParams. For every batch() call corresponding params are stored in batchParams 102 // vector. A continuous mode request is batch(... timeout=0 ..) followed by activate(). A batch 103 // mode request is batch(... timeout > 0 ...) followed by activate(). 104 // Info is a per-sensor data structure which contains the batch parameters for each client that 105 // has registered for this sensor. 106 struct Info { 107 BatchParams bestBatchParams; 108 // Key is the unique identifier(ident) for each client, value is the batch parameters 109 // requested by the client. 110 KeyedVector<void*, BatchParams> batchParams; 111 112 Info() : bestBatchParams(0, -1, -1) {} 113 // Sets batch parameters for this ident. Returns error if this ident is not already present 114 // in the KeyedVector above. 115 status_t setBatchParamsForIdent(void* ident, int flags, int64_t samplingPeriodNs, 116 int64_t maxBatchReportLatencyNs); 117 // Finds the optimal parameters for batching and stores them in bestBatchParams variable. 118 void selectBatchParams(); 119 // Removes batchParams for an ident and re-computes bestBatchParams. Returns the index of 120 // the removed ident. If index >=0, ident is present and successfully removed. 121 ssize_t removeBatchParamsForIdent(void* ident); 122 123 int numActiveClients(); 124 }; 125 DefaultKeyedVector<int, Info> mActivationCount; 126 127 // Use this vector to determine which client is activated or deactivated. 128 SortedVector<void *> mDisabledClients; 129 SensorDevice(); 130 131 bool isClientDisabled(void* ident); 132 bool isClientDisabledLocked(void* ident); 133 134 using Event = hardware::sensors::V1_0::Event; 135 using SensorInfo = hardware::sensors::V1_0::SensorInfo; 136 137 void convertToSensorEvent(const Event &src, sensors_event_t *dst); 138 139 void convertToSensorEvents( 140 const hardware::hidl_vec<Event> &src, 141 const hardware::hidl_vec<SensorInfo> &dynamicSensorsAdded, 142 sensors_event_t *dst); 143 144 bool mIsDirectReportSupported; 145}; 146 147// --------------------------------------------------------------------------- 148}; // namespace android 149 150#endif // ANDROID_SENSOR_DEVICE_H 151