1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "Hal.h"
#include <sensorsapi.h>
#include <sensors.h>
#include <portabledevicetypes.h>
#define MEAN_GRAVITY 9.80665
#define DEFAULT_SENSOR_POLL 100
using namespace mozilla::hal;
namespace mozilla {
namespace hal_impl {
static RefPtr<ISensor> sAccelerometer;
class SensorEvent final : public ISensorEvents {
public:
SensorEvent() : mCount(0) {
}
// IUnknown interface
STDMETHODIMP_(ULONG) AddRef() {
return InterlockedIncrement(&mCount);
}
STDMETHODIMP_(ULONG) Release() {
ULONG count = InterlockedDecrement(&mCount);
if (!count) {
delete this;
return 0;
}
return count;
}
STDMETHODIMP QueryInterface(REFIID iid, void** ppv) {
if (iid == IID_IUnknown) {
*ppv = static_cast<IUnknown*>(this);
} else if (iid == IID_ISensorEvents) {
*ppv = static_cast<ISensorEvents*>(this);
} else {
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
// ISensorEvents interface
STDMETHODIMP OnEvent(ISensor *aSensor, REFGUID aId, IPortableDeviceValues *aData) {
return S_OK;
}
STDMETHODIMP OnLeave(REFSENSOR_ID aId) {
return S_OK;
}
STDMETHODIMP OnStateChanged(ISensor *aSensor, SensorState state) {
return S_OK;
}
STDMETHODIMP OnDataUpdated(ISensor *aSensor, ISensorDataReport *aReport) {
PROPVARIANT v;
HRESULT hr;
InfallibleTArray<float> values;
// X-axis acceleration in g's
hr = aReport->GetSensorValue(SENSOR_DATA_TYPE_ACCELERATION_X_G, &v);
if (FAILED(hr)) {
return hr;
}
values.AppendElement(float(-v.dblVal * MEAN_GRAVITY));
// Y-axis acceleration in g's
hr = aReport->GetSensorValue(SENSOR_DATA_TYPE_ACCELERATION_Y_G, &v);
if (FAILED(hr)) {
return hr;
}
values.AppendElement(float(-v.dblVal * MEAN_GRAVITY));
// Z-axis acceleration in g's
hr = aReport->GetSensorValue(SENSOR_DATA_TYPE_ACCELERATION_Z_G, &v);
if (FAILED(hr)) {
return hr;
}
values.AppendElement(float(-v.dblVal * MEAN_GRAVITY));
hal::SensorData sdata(hal::SENSOR_ACCELERATION,
PR_Now(),
values,
hal::SENSOR_ACCURACY_UNKNOWN);
hal::NotifySensorChange(sdata);
return S_OK;
}
private:
ULONG mCount;
};
void
EnableSensorNotifications(SensorType aSensor)
{
if (aSensor != SENSOR_ACCELERATION) {
return;
}
if (sAccelerometer) {
return;
}
RefPtr<ISensorManager> manager;
if (FAILED(CoCreateInstance(CLSID_SensorManager, nullptr,
CLSCTX_INPROC_SERVER,
IID_ISensorManager,
getter_AddRefs(manager)))) {
return;
}
// accelerometer event
RefPtr<ISensorCollection> collection;
if (FAILED(manager->GetSensorsByType(SENSOR_TYPE_ACCELEROMETER_3D,
getter_AddRefs(collection)))) {
return;
}
ULONG count = 0;
collection->GetCount(&count);
if (!count) {
return;
}
RefPtr<ISensor> sensor;
collection->GetAt(0, getter_AddRefs(sensor));
if (!sensor) {
return;
}
// Set report interval to 100ms if possible.
// Default value depends on drivers.
RefPtr<IPortableDeviceValues> values;
if (SUCCEEDED(CoCreateInstance(CLSID_PortableDeviceValues, nullptr,
CLSCTX_INPROC_SERVER,
IID_IPortableDeviceValues,
getter_AddRefs(values)))) {
if (SUCCEEDED(values->SetUnsignedIntegerValue(
SENSOR_PROPERTY_CURRENT_REPORT_INTERVAL,
DEFAULT_SENSOR_POLL))) {
RefPtr<IPortableDeviceValues> returns;
sensor->SetProperties(values, getter_AddRefs(returns));
}
}
RefPtr<SensorEvent> event = new SensorEvent();
RefPtr<ISensorEvents> sensorEvents;
if (FAILED(event->QueryInterface(IID_ISensorEvents,
getter_AddRefs(sensorEvents)))) {
return;
}
if (FAILED(sensor->SetEventSink(sensorEvents))) {
return;
}
sAccelerometer = sensor;
}
void
DisableSensorNotifications(SensorType aSensor)
{
if (aSensor == SENSOR_ACCELERATION && sAccelerometer) {
sAccelerometer->SetEventSink(nullptr);
sAccelerometer = nullptr;
}
}
} // hal_impl
} // mozilla
|
