1 /*
2  * Copyright (C) 2015 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 #ifndef SENSORS_H_
18 #define SENSORS_H_
19 
20 #include <hardware/hardware.h>
21 #include <hardware/sensors.h>
22 #include <media/stagefright/foundation/ABase.h>
23 #include <utils/RefBase.h>
24 
25 #include <memory>
26 #include <unordered_set>
27 #include <vector>
28 
29 namespace android {
30     namespace SensorHalExt {
31         class DynamicSensorManager;
32     } // namespace BaseSensorObject
33 } // namespace android
34 
35 using android::SensorHalExt::DynamicSensorManager;
36 
37 class SensorContext {
38 public:
39     struct sensors_poll_device_1 device;
40 
41     explicit SensorContext(const struct hw_module_t *module);
42 
43     size_t getSensorList(sensor_t const **list);
44 
45 private:
46 
47     int close();
48     int activate(int handle, int enabled);
49     int setDelay(int handle, int64_t delayNs);
50     int poll(sensors_event_t *data, int count);
51 
52     int batch(int handle, int64_t sampling_period_ns,
53               int64_t max_report_latency_ns);
54 
55     int flush(int handle);
56 
57     // static wrappers
58     static int CloseWrapper(struct hw_device_t *dev);
59 
60     static int ActivateWrapper(
61             struct sensors_poll_device_t *dev, int handle, int enabled);
62 
63     static int SetDelayWrapper(
64             struct sensors_poll_device_t *dev, int handle, int64_t delayNs);
65 
66     static int PollWrapper(
67             struct sensors_poll_device_t *dev, sensors_event_t *data, int count);
68 
69     static int BatchWrapper(
70             struct sensors_poll_device_1 *dev,
71             int handle,
72             int flags,
73             int64_t sampling_period_ns,
74             int64_t max_report_latency_ns);
75 
76     static int FlushWrapper(struct sensors_poll_device_1 *dev, int handle);
77 
78     static constexpr int32_t kDynamicHandleBase = 0x10000;
79     static constexpr int32_t kDynamicHandleEnd = 0x1000000;
80     static constexpr int32_t kMaxDynamicHandleCount = kDynamicHandleEnd - kDynamicHandleBase;
81 
82     std::unique_ptr<DynamicSensorManager> mDynamicSensorManager;
83 
84     DISALLOW_EVIL_CONSTRUCTORS(SensorContext);
85 };
86 
87 #endif  // SENSORS_H_
88