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
Sensor()32 Sensor::Sensor()
33 : mHandle(0), mType(0),
34 mMinValue(0), mMaxValue(0), mResolution(0),
35 mPower(0), mMinDelay(0)
36 {
37 }
38
Sensor(struct sensor_t const * hwSensor)39 Sensor::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
~Sensor()53 Sensor::~Sensor()
54 {
55 }
56
getName() const57 const String8& Sensor::getName() const {
58 return mName;
59 }
60
getVendor() const61 const String8& Sensor::getVendor() const {
62 return mVendor;
63 }
64
getHandle() const65 int32_t Sensor::getHandle() const {
66 return mHandle;
67 }
68
getType() const69 int32_t Sensor::getType() const {
70 return mType;
71 }
72
getMinValue() const73 float Sensor::getMinValue() const {
74 return mMinValue;
75 }
76
getMaxValue() const77 float Sensor::getMaxValue() const {
78 return mMaxValue;
79 }
80
getResolution() const81 float Sensor::getResolution() const {
82 return mResolution;
83 }
84
getPowerUsage() const85 float Sensor::getPowerUsage() const {
86 return mPower;
87 }
88
getMinDelay() const89 int32_t Sensor::getMinDelay() const {
90 return mMinDelay;
91 }
92
getMinDelayNs() const93 nsecs_t Sensor::getMinDelayNs() const {
94 return getMinDelay() * 1000;
95 }
96
getVersion() const97 int32_t Sensor::getVersion() const {
98 return mVersion;
99 }
100
getFlattenedSize() const101 size_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
getFdCount() const110 size_t Sensor::getFdCount() const
111 {
112 return 0;
113 }
114
115 static inline
write(void * buffer,size_t offset,const String8 & value)116 size_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
121 static inline
write(void * buffer,size_t offset,float value)122 size_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
127 static inline
write(void * buffer,size_t offset,int32_t value)128 size_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
flatten(void * buffer,size_t size,int fds[],size_t count) const133 status_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
156 static inline
read(void const * buffer,size_t offset,String8 * value,int32_t len)157 size_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
162 static inline
read(void const * buffer,size_t offset,float * value)163 size_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
168 static inline
read(void const * buffer,size_t offset,int32_t * value)169 size_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
unflatten(void const * buffer,size_t size,int fds[],size_t count)174 status_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