ISensorEventConnection.cpp revision 724d91d778e71c8186399f4955de14b54812b3ed 
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 flushSensor(int handle) {
81        Parcel data, reply;
82        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());
83        data.writeInt32(handle);
84        remote()->transact(FLUSH_SENSOR, data, &reply);
85        return reply.readInt32();
86    }
87};
88
89IMPLEMENT_META_INTERFACE(SensorEventConnection, "android.gui.SensorEventConnection");
90
91// ----------------------------------------------------------------------------
92
93status_t BnSensorEventConnection::onTransact(
94    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
95{
96    switch(code) {
97        case GET_SENSOR_CHANNEL: {
98            CHECK_INTERFACE(ISensorEventConnection, data, reply);
99            sp<BitTube> channel(getSensorChannel());
100            channel->writeToParcel(reply);
101            return NO_ERROR;
102        } break;
103        case ENABLE_DISABLE: {
104            CHECK_INTERFACE(ISensorEventConnection, data, reply);
105            int handle = data.readInt32();
106            int enabled = data.readInt32();
107            nsecs_t samplingPeriodNs = data.readInt64();
108            nsecs_t maxBatchReportLatencyNs = data.readInt64();
109            int reservedFlags = data.readInt32();
110            status_t result = enableDisable(handle, enabled, samplingPeriodNs,
111                                            maxBatchReportLatencyNs, reservedFlags);
112            reply->writeInt32(result);
113            return NO_ERROR;
114        } break;
115        case SET_EVENT_RATE: {
116            CHECK_INTERFACE(ISensorEventConnection, data, reply);
117            int handle = data.readInt32();
118            int ns = data.readInt64();
119            status_t result = setEventRate(handle, ns);
120            reply->writeInt32(result);
121            return NO_ERROR;
122        } break;
123        case FLUSH_SENSOR: {
124            CHECK_INTERFACE(ISensorEventConnection, data, reply);
125            int handle = data.readInt32();
126            status_t result = flushSensor(handle);
127            reply->writeInt32(result);
128            return NO_ERROR;
129        } break;
130    }
131    return BBinder::onTransact(code, data, reply, flags);
132}
133
134// ----------------------------------------------------------------------------
135}; // namespace android
136