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