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::getSize() 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 110static inline 111size_t write(void* buffer, size_t offset, const String8& value) { 112 memcpy(static_cast<char*>(buffer) + offset, value.string(), value.length()); 113 return (value.length() + 3) & ~3; 114} 115 116static inline 117size_t write(void* buffer, size_t offset, float value) { 118 *reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value; 119 return sizeof(float); 120} 121 122static inline 123size_t write(void* buffer, size_t offset, int32_t value) { 124 *reinterpret_cast<int32_t*>(static_cast<char*>(buffer) + offset) = value; 125 return sizeof(int32_t); 126} 127 128status_t Sensor::flatten(void* buffer) const 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, mVersion); 136 offset += write(buffer, offset, mHandle); 137 offset += write(buffer, offset, mType); 138 offset += write(buffer, offset, mMinValue); 139 offset += write(buffer, offset, mMaxValue); 140 offset += write(buffer, offset, mResolution); 141 offset += write(buffer, offset, mPower); 142 offset += write(buffer, offset, mMinDelay); 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{ 166 int32_t len; 167 size_t offset = 0; 168 offset += read(buffer, offset, &len); 169 offset += read(buffer, offset, &mName, len); 170 offset += read(buffer, offset, &len); 171 offset += read(buffer, offset, &mVendor, len); 172 offset += read(buffer, offset, &mVersion); 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 return NO_ERROR; 181} 182 183// ---------------------------------------------------------------------------- 184}; // namespace android 185