IDisplayEventConnection.cpp revision 478ae5eb5a0047e1b2988c896cff6363b455ee50 
1/*
2 * Copyright (C) 2011 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/IDisplayEventConnection.h>
28#include <gui/BitTube.h>
29
30namespace android {
31// ----------------------------------------------------------------------------
32
33enum {
34    GET_DATA_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
35    SET_VSYNC_RATE,
36    REQUEST_NEXT_VSYNC
37};
38
39class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
40{
41public:
42    BpDisplayEventConnection(const sp<IBinder>& impl)
43        : BpInterface<IDisplayEventConnection>(impl)
44    {
45    }
46
47    virtual sp<BitTube> getDataChannel() const
48    {
49        Parcel data, reply;
50        data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
51        remote()->transact(GET_DATA_CHANNEL, data, &reply);
52        return new BitTube(reply);
53    }
54
55    virtual void setVsyncRate(uint32_t count) {
56        Parcel data, reply;
57        data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
58        data.writeInt32(count);
59        remote()->transact(SET_VSYNC_RATE, data, &reply);
60    }
61
62    virtual void requestNextVsync() {
63        Parcel data, reply;
64        data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
65        remote()->transact(REQUEST_NEXT_VSYNC, data, &reply, IBinder::FLAG_ONEWAY);
66    }
67};
68
69IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
70
71// ----------------------------------------------------------------------------
72
73status_t BnDisplayEventConnection::onTransact(
74    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
75{
76    switch(code) {
77        case GET_DATA_CHANNEL: {
78            CHECK_INTERFACE(IDisplayEventConnection, data, reply);
79            sp<BitTube> channel(getDataChannel());
80            channel->writeToParcel(reply);
81            return NO_ERROR;
82        } break;
83        case SET_VSYNC_RATE: {
84            CHECK_INTERFACE(IDisplayEventConnection, data, reply);
85            setVsyncRate(data.readInt32());
86            return NO_ERROR;
87        } break;
88        case REQUEST_NEXT_VSYNC: {
89            CHECK_INTERFACE(IDisplayEventConnection, data, reply);
90            requestNextVsync();
91            return NO_ERROR;
92        } break;
93    }
94    return BBinder::onTransact(code, data, reply, flags);
95}
96
97// ----------------------------------------------------------------------------
98}; // namespace android
99