ISensorEventConnection.cpp revision 701166d9f60a6e1149ff568aec0e03f3f3925292 
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/RefBase.h>
22#include <utils/Timers.h>
23
24#include <binder/Parcel.h>
25#include <binder/IInterface.h>
26
27#include <gui/ISensorEventConnection.h>
28#include <gui/BitTube.h>
29
30namespace android {
31// ----------------------------------------------------------------------------
32
33enum {
34    GET_SENSOR_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
35    ENABLE_DISABLE,
36    SET_EVENT_RATE,
37    FLUSH_SENSOR
38};
39
40class BpSensorEventConnection : public BpInterface<ISensorEventConnection>
41{
42public:
43    BpSensorEventConnection(const sp<IBinder>& impl)
44        : BpInterface<ISensorEventConnection>(impl)
45    {
46    }
47
48    virtual sp<BitTube> getSensorChannel() const
49    {
50        Parcel data, reply;
51        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
52        remote()->transact(GET_SENSOR_CHANNEL, data, &reply);
53        return new BitTube(reply);
54    }
55
56    virtual status_t enableDisable(int handle, bool enabled, nsecs_t samplingPeriodNs,
57                                   nsecs_t maxBatchReportLatencyNs, int reservedFlags)
58    {
59        Parcel data, reply;
60        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
61        data.writeInt32(handle);
62        data.writeInt32(enabled);
63        data.writeInt64(samplingPeriodNs);
64        data.writeInt64(maxBatchReportLatencyNs);
65        data.writeInt32(reservedFlags);
66        remote()->transact(ENABLE_DISABLE, data, &reply);
67        return reply.readInt32();
68    }
69
70    virtual status_t setEventRate(int handle, nsecs_t ns)
71    {
72        Parcel data, reply;
73        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
74        data.writeInt32(handle);
75        data.writeInt64(ns);
76        remote()->transact(SET_EVENT_RATE, data, &reply);
77        return reply.readInt32();
78    }
79
80    virtual status_t flush() {
81        Parcel data, reply;
82        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
83        remote()->transact(FLUSH_SENSOR, data, &reply);
84        return reply.readInt32();
85    }
86};
87
88IMPLEMENT_META_INTERFACE(SensorEventConnection, "android.gui.SensorEventConnection");
89
90// ----------------------------------------------------------------------------
91
92status_t BnSensorEventConnection::onTransact(
93    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
94{
95    switch(code) {
96        case GET_SENSOR_CHANNEL: {
97            CHECK_INTERFACE(ISensorEventConnection, data, reply);
98            sp<BitTube> channel(getSensorChannel());
99            channel->writeToParcel(reply);
100            return NO_ERROR;
101        } break;
102        case ENABLE_DISABLE: {
103            CHECK_INTERFACE(ISensorEventConnection, data, reply);
104            int handle = data.readInt32();
105            int enabled = data.readInt32();
106            nsecs_t samplingPeriodNs = data.readInt64();
107            nsecs_t maxBatchReportLatencyNs = data.readInt64();
108            int reservedFlags = data.readInt32();
109            status_t result = enableDisable(handle, enabled, samplingPeriodNs,
110                                            maxBatchReportLatencyNs, reservedFlags);
111            reply->writeInt32(result);
112            return NO_ERROR;
113        } break;
114        case SET_EVENT_RATE: {
115            CHECK_INTERFACE(ISensorEventConnection, data, reply);
116            int handle = data.readInt32();
117            int ns = data.readInt64();
118            status_t result = setEventRate(handle, ns);
119            reply->writeInt32(result);
120            return NO_ERROR;
121        } break;
122        case FLUSH_SENSOR: {
123            CHECK_INTERFACE(ISensorEventConnection, data, reply);
124            status_t result = flush();
125            reply->writeInt32(result);
126            return NO_ERROR;
127        } break;
128    }
129    return BBinder::onTransact(code, data, reply, flags);
130}
131
132// ----------------------------------------------------------------------------
133}; // namespace android
134