Sensor.cpp revision b62013f6aafee08cfad25a2712dc32264e44f783
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#include <stdint.h> 18#include <sys/types.h> 19 20#include <utils/Errors.h> 21#include <utils/String8.h> 22#include <utils/Flattenable.h> 23 24#include <hardware/sensors.h> 25 26#include <gui/Sensor.h> 27 28// ---------------------------------------------------------------------------- 29namespace android { 30// ---------------------------------------------------------------------------- 31 32Sensor::Sensor() 33 : mHandle(0), mType(0), 34 mMinValue(0), mMaxValue(0), mResolution(0), 35 mPower(0), mMinDelay(0) 36{ 37} 38 39Sensor::Sensor(struct sensor_t const* hwSensor) 40{ 41 mName = hwSensor->name; 42 mVendor = hwSensor->vendor; 43 mHandle = hwSensor->handle; 44 mType = hwSensor->type; 45 mMinValue = 0; // FIXME: minValue 46 mMaxValue = hwSensor->maxRange; // FIXME: maxValue 47 mResolution = hwSensor->resolution; 48 mPower = hwSensor->power; 49 mMinDelay = hwSensor->minDelay; 50} 51 52Sensor::~Sensor() 53{ 54} 55 56const String8& Sensor::getName() const { 57 return mName; 58} 59 60const String8& Sensor::getVendor() const { 61 return mVendor; 62} 63 64int32_t Sensor::getHandle() const { 65 return mHandle; 66} 67 68int32_t Sensor::getType() const { 69 return mType; 70} 71 72float Sensor::getMinValue() const { 73 return mMinValue; 74} 75 76float Sensor::getMaxValue() const { 77 return mMaxValue; 78} 79 80float Sensor::getResolution() const { 81 return mResolution; 82} 83 84float Sensor::getPowerUsage() const { 85 return mPower; 86} 87 88int32_t Sensor::getMinDelay() const { 89 return mMinDelay; 90} 91 92nsecs_t Sensor::getMinDelayNs() const { 93 return getMinDelay() * 1000; 94} 95 96int32_t Sensor::getVersion() const { 97 return mVersion; 98} 99 100size_t Sensor::getFlattenedSize() const 101{ 102 return sizeof(int32_t) + ((mName.length() + 3) & ~3) + 103 sizeof(int32_t) + ((mVendor.length() + 3) & ~3) + 104 sizeof(int32_t) * 2 + 105 sizeof(float) * 4 + 106 sizeof(int32_t); 107} 108 109size_t Sensor::getFdCount() const 110{ 111 return 0; 112} 113 114static inline 115size_t write(void* buffer, size_t offset, const String8& value) { 116 memcpy(static_cast<char*>(buffer) + offset, value.string(), value.length()); 117 return (value.length() + 3) & ~3; 118} 119 120static inline 121size_t write(void* buffer, size_t offset, float value) { 122 *reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value; 123 return sizeof(float); 124} 125 126static inline 127size_t write(void* buffer, size_t offset, int32_t value) { 128 *reinterpret_cast<int32_t*>(static_cast<char*>(buffer) + offset) = value; 129 return sizeof(int32_t); 130} 131 132status_t Sensor::flatten(void* buffer, size_t size, 133 int fds[], size_t count) const 134{ 135 if (size < Sensor::getFlattenedSize()) 136 return -ENOMEM; 137 138 size_t offset = 0; 139 offset += write(buffer, offset, int32_t(mName.length())); 140 offset += write(buffer, offset, mName); 141 offset += write(buffer, offset, int32_t(mVendor.length())); 142 offset += write(buffer, offset, mVendor); 143 offset += write(buffer, offset, mHandle); 144 offset += write(buffer, offset, mType); 145 offset += write(buffer, offset, mMinValue); 146 offset += write(buffer, offset, mMaxValue); 147 offset += write(buffer, offset, mResolution); 148 offset += write(buffer, offset, mPower); 149 offset += write(buffer, offset, mMinDelay); 150 151 return NO_ERROR; 152} 153 154static inline 155size_t read(void const* buffer, size_t offset, String8* value, int32_t len) { 156 value->setTo(static_cast<char const*>(buffer) + offset, len); 157 return (len + 3) & ~3; 158} 159 160static inline 161size_t read(void const* buffer, size_t offset, float* value) { 162 *value = *reinterpret_cast<float const*>(static_cast<char const*>(buffer) + offset); 163 return sizeof(float); 164} 165 166static inline 167size_t read(void const* buffer, size_t offset, int32_t* value) { 168 *value = *reinterpret_cast<int32_t const*>(static_cast<char const*>(buffer) + offset); 169 return sizeof(int32_t); 170} 171 172status_t Sensor::unflatten(void const* buffer, size_t size, 173 int fds[], size_t count) 174{ 175 int32_t len; 176 size_t offset = 0; 177 offset += read(buffer, offset, &len); 178 offset += read(buffer, offset, &mName, len); 179 offset += read(buffer, offset, &len); 180 offset += read(buffer, offset, &mVendor, len); 181 offset += read(buffer, offset, &mHandle); 182 offset += read(buffer, offset, &mType); 183 offset += read(buffer, offset, &mMinValue); 184 offset += read(buffer, offset, &mMaxValue); 185 offset += read(buffer, offset, &mResolution); 186 offset += read(buffer, offset, &mPower); 187 offset += read(buffer, offset, &mMinDelay); 188 189 return NO_ERROR; 190} 191 192// ---------------------------------------------------------------------------- 193}; // namespace android 194