Sensor.cpp revision 2ebc4d6d947ef488198b8777d9190c93904b4b9a
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 mVersion = hwSensor->version; 44 mHandle = hwSensor->handle; 45 mType = hwSensor->type; 46 mMinValue = 0; // FIXME: minValue 47 mMaxValue = hwSensor->maxRange; // FIXME: maxValue 48 mResolution = hwSensor->resolution; 49 mPower = hwSensor->power; 50 mMinDelay = hwSensor->minDelay; 51} 52 53Sensor::~Sensor() 54{ 55} 56 57const String8& Sensor::getName() const { 58 return mName; 59} 60 61const String8& Sensor::getVendor() const { 62 return mVendor; 63} 64 65int32_t Sensor::getHandle() const { 66 return mHandle; 67} 68 69int32_t Sensor::getType() const { 70 return mType; 71} 72 73float Sensor::getMinValue() const { 74 return mMinValue; 75} 76 77float Sensor::getMaxValue() const { 78 return mMaxValue; 79} 80 81float Sensor::getResolution() const { 82 return mResolution; 83} 84 85float Sensor::getPowerUsage() const { 86 return mPower; 87} 88 89int32_t Sensor::getMinDelay() const { 90 return mMinDelay; 91} 92 93nsecs_t Sensor::getMinDelayNs() const { 94 return getMinDelay() * 1000; 95} 96 97int32_t Sensor::getVersion() const { 98 return mVersion; 99} 100 101size_t Sensor::getFlattenedSize() const 102{ 103 return sizeof(int32_t) + ((mName.length() + 3) & ~3) + 104 sizeof(int32_t) + ((mVendor.length() + 3) & ~3) + 105 sizeof(int32_t) * 3 + 106 sizeof(float) * 4 + 107 sizeof(int32_t); 108} 109 110size_t Sensor::getFdCount() const 111{ 112 return 0; 113} 114 115static inline 116size_t write(void* buffer, size_t offset, const String8& value) { 117 memcpy(static_cast<char*>(buffer) + offset, value.string(), value.length()); 118 return (value.length() + 3) & ~3; 119} 120 121static inline 122size_t write(void* buffer, size_t offset, float value) { 123 *reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value; 124 return sizeof(float); 125} 126 127static inline 128size_t write(void* buffer, size_t offset, int32_t value) { 129 *reinterpret_cast<int32_t*>(static_cast<char*>(buffer) + offset) = value; 130 return sizeof(int32_t); 131} 132 133status_t Sensor::flatten(void* buffer, size_t size, 134 int fds[], size_t count) const 135{ 136 if (size < Sensor::getFlattenedSize()) 137 return -ENOMEM; 138 139 size_t offset = 0; 140 offset += write(buffer, offset, int32_t(mName.length())); 141 offset += write(buffer, offset, mName); 142 offset += write(buffer, offset, int32_t(mVendor.length())); 143 offset += write(buffer, offset, mVendor); 144 offset += write(buffer, offset, mVersion); 145 offset += write(buffer, offset, mHandle); 146 offset += write(buffer, offset, mType); 147 offset += write(buffer, offset, mMinValue); 148 offset += write(buffer, offset, mMaxValue); 149 offset += write(buffer, offset, mResolution); 150 offset += write(buffer, offset, mPower); 151 offset += write(buffer, offset, mMinDelay); 152 153 return NO_ERROR; 154} 155 156static inline 157size_t read(void const* buffer, size_t offset, String8* value, int32_t len) { 158 value->setTo(static_cast<char const*>(buffer) + offset, len); 159 return (len + 3) & ~3; 160} 161 162static inline 163size_t read(void const* buffer, size_t offset, float* value) { 164 *value = *reinterpret_cast<float const*>(static_cast<char const*>(buffer) + offset); 165 return sizeof(float); 166} 167 168static inline 169size_t read(void const* buffer, size_t offset, int32_t* value) { 170 *value = *reinterpret_cast<int32_t const*>(static_cast<char const*>(buffer) + offset); 171 return sizeof(int32_t); 172} 173 174status_t Sensor::unflatten(void const* buffer, size_t size, 175 int fds[], size_t count) 176{ 177 int32_t len; 178 size_t offset = 0; 179 offset += read(buffer, offset, &len); 180 offset += read(buffer, offset, &mName, len); 181 offset += read(buffer, offset, &len); 182 offset += read(buffer, offset, &mVendor, len); 183 offset += read(buffer, offset, &mVersion); 184 offset += read(buffer, offset, &mHandle); 185 offset += read(buffer, offset, &mType); 186 offset += read(buffer, offset, &mMinValue); 187 offset += read(buffer, offset, &mMaxValue); 188 offset += read(buffer, offset, &mResolution); 189 offset += read(buffer, offset, &mPower); 190 offset += read(buffer, offset, &mMinDelay); 191 192 return NO_ERROR; 193} 194 195// ---------------------------------------------------------------------------- 196}; // namespace android 197