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 92size_t Sensor::getFlattenedSize() const 93{ 94 return sizeof(int32_t) + ((mName.length() + 3) & ~3) + 95 sizeof(int32_t) + ((mVendor.length() + 3) & ~3) + 96 sizeof(int32_t) * 2 + 97 sizeof(float) * 4 + 98 sizeof(int32_t); 99} 100 101size_t Sensor::getFdCount() const 102{ 103 return 0; 104} 105 106static inline 107size_t write(void* buffer, size_t offset, const String8& value) { 108 memcpy(static_cast<char*>(buffer) + offset, value.string(), value.length()); 109 return (value.length() + 3) & ~3; 110} 111 112static inline 113size_t write(void* buffer, size_t offset, float value) { 114 *reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value; 115 return sizeof(float); 116} 117 118static inline 119size_t write(void* buffer, size_t offset, int32_t value) { 120 *reinterpret_cast<int32_t*>(static_cast<char*>(buffer) + offset) = value; 121 return sizeof(int32_t); 122} 123 124status_t Sensor::flatten(void* buffer, size_t size, 125 int fds[], size_t count) const 126{ 127 if (size < Sensor::getFlattenedSize()) 128 return -ENOMEM; 129 130 size_t offset = 0; 131 offset += write(buffer, offset, int32_t(mName.length())); 132 offset += write(buffer, offset, mName); 133 offset += write(buffer, offset, int32_t(mVendor.length())); 134 offset += write(buffer, offset, mVendor); 135 offset += write(buffer, offset, mHandle); 136 offset += write(buffer, offset, mType); 137 offset += write(buffer, offset, mMinValue); 138 offset += write(buffer, offset, mMaxValue); 139 offset += write(buffer, offset, mResolution); 140 offset += write(buffer, offset, mPower); 141 offset += write(buffer, offset, mMinDelay); 142 143 return NO_ERROR; 144} 145 146static inline 147size_t read(void const* buffer, size_t offset, String8* value, int32_t len) { 148 value->setTo(static_cast<char const*>(buffer) + offset, len); 149 return (len + 3) & ~3; 150} 151 152static inline 153size_t read(void const* buffer, size_t offset, float* value) { 154 *value = *reinterpret_cast<float const*>(static_cast<char const*>(buffer) + offset); 155 return sizeof(float); 156} 157 158static inline 159size_t read(void const* buffer, size_t offset, int32_t* value) { 160 *value = *reinterpret_cast<int32_t const*>(static_cast<char const*>(buffer) + offset); 161 return sizeof(int32_t); 162} 163 164status_t Sensor::unflatten(void const* buffer, size_t size, 165 int fds[], size_t count) 166{ 167 int32_t len; 168 size_t offset = 0; 169 offset += read(buffer, offset, &len); 170 offset += read(buffer, offset, &mName, len); 171 offset += read(buffer, offset, &len); 172 offset += read(buffer, offset, &mVendor, len); 173 offset += read(buffer, offset, &mHandle); 174 offset += read(buffer, offset, &mType); 175 offset += read(buffer, offset, &mMinValue); 176 offset += read(buffer, offset, &mMaxValue); 177 offset += read(buffer, offset, &mResolution); 178 offset += read(buffer, offset, &mPower); 179 offset += read(buffer, offset, &mMinDelay); 180 181 return NO_ERROR; 182} 183 184// ---------------------------------------------------------------------------- 185}; // namespace android 186