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
30 namespace android {
31 // ----------------------------------------------------------------------------
32
33 enum {
34 GET_DATA_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
35 SET_VSYNC_RATE,
36 REQUEST_NEXT_VSYNC
37 };
38
39 class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
40 {
41 public:
BpDisplayEventConnection(const sp<IBinder> & impl)42 BpDisplayEventConnection(const sp<IBinder>& impl)
43 : BpInterface<IDisplayEventConnection>(impl)
44 {
45 }
46
47 virtual ~BpDisplayEventConnection();
48
getDataChannel() const49 virtual sp<BitTube> getDataChannel() const
50 {
51 Parcel data, reply;
52 data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
53 remote()->transact(GET_DATA_CHANNEL, data, &reply);
54 return new BitTube(reply);
55 }
56
setVsyncRate(uint32_t count)57 virtual void setVsyncRate(uint32_t count) {
58 Parcel data, reply;
59 data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
60 data.writeUint32(count);
61 remote()->transact(SET_VSYNC_RATE, data, &reply);
62 }
63
requestNextVsync()64 virtual void requestNextVsync() {
65 Parcel data, reply;
66 data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
67 remote()->transact(REQUEST_NEXT_VSYNC, data, &reply, IBinder::FLAG_ONEWAY);
68 }
69 };
70
71 // Out-of-line virtual method definition to trigger vtable emission in this
72 // translation unit (see clang warning -Wweak-vtables)
~BpDisplayEventConnection()73 BpDisplayEventConnection::~BpDisplayEventConnection() {}
74
75 IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
76
77 // ----------------------------------------------------------------------------
78
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)79 status_t BnDisplayEventConnection::onTransact(
80 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
81 {
82 switch(code) {
83 case GET_DATA_CHANNEL: {
84 CHECK_INTERFACE(IDisplayEventConnection, data, reply);
85 sp<BitTube> channel(getDataChannel());
86 channel->writeToParcel(reply);
87 return NO_ERROR;
88 }
89 case SET_VSYNC_RATE: {
90 CHECK_INTERFACE(IDisplayEventConnection, data, reply);
91 setVsyncRate(data.readUint32());
92 return NO_ERROR;
93 }
94 case REQUEST_NEXT_VSYNC: {
95 CHECK_INTERFACE(IDisplayEventConnection, data, reply);
96 requestNextVsync();
97 return NO_ERROR;
98 }
99 }
100 return BBinder::onTransact(code, data, reply, flags);
101 }
102
103 // ----------------------------------------------------------------------------
104 }; // namespace android
105