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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#ifndef ANDROID_SENSOR_INTERFACE_H
18#define ANDROID_SENSOR_INTERFACE_H
19
20#include <gui/Sensor.h>
21#include <utils/RefBase.h>
22
23// ---------------------------------------------------------------------------
24
25namespace android {
26// ---------------------------------------------------------------------------
27class SensorDevice;
28class SensorFusion;
29
30class SensorInterface : public VirtualLightRefBase {
31public:
32    virtual ~SensorInterface() {}
33
34    virtual bool process(sensors_event_t* outEvent, const sensors_event_t& event) = 0;
35
36    virtual status_t activate(void* ident, bool enabled) = 0;
37    virtual status_t setDelay(void* ident, int handle, int64_t ns) = 0;
38    virtual status_t batch(void* ident, int handle, int /*flags*/, int64_t samplingPeriodNs,
39                           int64_t maxBatchReportLatencyNs) = 0;
40
41    virtual status_t flush(void* /*ident*/, int /*handle*/) = 0;
42
43    virtual const Sensor& getSensor() const = 0;
44    virtual bool isVirtual() const = 0;
45    virtual void autoDisable(void* /*ident*/, int /*handle*/) = 0;
46};
47
48class BaseSensor : public SensorInterface {
49public:
50    BaseSensor(const sensor_t& sensor);
51    BaseSensor(const sensor_t& sensor, const uint8_t (&uuid)[16]);
52
53    // Not all sensors need to support batching.
54    virtual status_t batch(void* ident, int handle, int, int64_t samplingPeriodNs,
55                           int64_t maxBatchReportLatencyNs) override {
56        if (maxBatchReportLatencyNs == 0) {
57            return setDelay(ident, handle, samplingPeriodNs);
58        }
59        return -EINVAL;
60    }
61
62    virtual status_t flush(void* /*ident*/, int /*handle*/) override {
63        return -EINVAL;
64    }
65
66    virtual const Sensor& getSensor() const override { return mSensor; }
67    virtual void autoDisable(void* /*ident*/, int /*handle*/) override { }
68protected:
69    SensorDevice& mSensorDevice;
70    Sensor mSensor;
71};
72
73// ---------------------------------------------------------------------------
74
75class HardwareSensor : public BaseSensor {
76public:
77    HardwareSensor(const sensor_t& sensor);
78    HardwareSensor(const sensor_t& sensor, const uint8_t (&uuid)[16]);
79
80    virtual ~HardwareSensor();
81
82    virtual bool process(sensors_event_t* outEvent,
83            const sensors_event_t& event);
84
85    virtual status_t activate(void* ident, bool enabled) override;
86    virtual status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
87                           int64_t maxBatchReportLatencyNs) override;
88    virtual status_t setDelay(void* ident, int handle, int64_t ns) override;
89    virtual status_t flush(void* ident, int handle) override;
90    virtual bool isVirtual() const override { return false; }
91    virtual void autoDisable(void *ident, int handle) override;
92};
93
94class VirtualSensor : public BaseSensor
95{
96public:
97    VirtualSensor();
98    virtual bool isVirtual() const override { return true; }
99protected:
100    SensorFusion& mSensorFusion;
101};
102
103
104// ---------------------------------------------------------------------------
105}; // namespace android
106
107#endif // ANDROID_SENSOR_INTERFACE_H
108