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 // ---------------------------------------------------------------------------- 29 namespace android { 30 // ---------------------------------------------------------------------------- 31 32 Sensor::Sensor() 33 : mHandle(0), mType(0), 34 mMinValue(0), mMaxValue(0), mResolution(0), 35 mPower(0), mMinDelay(0) 36 { 37 } 38 39 Sensor::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 52 Sensor::~Sensor() 53 { 54 } 55 56 const String8& Sensor::getName() const { 57 return mName; 58 } 59 60 const String8& Sensor::getVendor() const { 61 return mVendor; 62 } 63 64 int32_t Sensor::getHandle() const { 65 return mHandle; 66 } 67 68 int32_t Sensor::getType() const { 69 return mType; 70 } 71 72 float Sensor::getMinValue() const { 73 return mMinValue; 74 } 75 76 float Sensor::getMaxValue() const { 77 return mMaxValue; 78 } 79 80 float Sensor::getResolution() const { 81 return mResolution; 82 } 83 84 float Sensor::getPowerUsage() const { 85 return mPower; 86 } 87 88 int32_t Sensor::getMinDelay() const { 89 return mMinDelay; 90 } 91 92 nsecs_t Sensor::getMinDelayNs() const { 93 return getMinDelay() * 1000; 94 } 95 96 int32_t Sensor::getVersion() const { 97 return mVersion; 98 } 99 100 size_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 } 108 109 size_t Sensor::getFdCount() const 110 { 111 return 0; 112 } 113 114 static inline 115 size_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 } 119 120 static inline 121 size_t write(void* buffer, size_t offset, float value) { 122 *reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value; 123 return sizeof(float); 124 } 125 126 static inline 127 size_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 } 131 132 status_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 } 153 154 static inline 155 size_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 } 159 160 static inline 161 size_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 } 165 166 static inline 167 size_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 } 171 172 status_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
