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 <string.h>
18
19 #include <utils/Errors.h>
20
21 #include <gui/DisplayEventReceiver.h>
22 #include <gui/IDisplayEventConnection.h>
23 #include <gui/ISurfaceComposer.h>
24
25 #include <private/gui/ComposerService.h>
26
27 #include <private/gui/BitTube.h>
28
29 // ---------------------------------------------------------------------------
30
31 namespace android {
32
33 // ---------------------------------------------------------------------------
34
DisplayEventReceiver(ISurfaceComposer::VsyncSource vsyncSource,ISurfaceComposer::ConfigChanged configChanged)35 DisplayEventReceiver::DisplayEventReceiver(ISurfaceComposer::VsyncSource vsyncSource,
36 ISurfaceComposer::ConfigChanged configChanged) {
37 sp<ISurfaceComposer> sf(ComposerService::getComposerService());
38 if (sf != nullptr) {
39 mEventConnection = sf->createDisplayEventConnection(vsyncSource, configChanged);
40 if (mEventConnection != nullptr) {
41 mDataChannel = std::make_unique<gui::BitTube>();
42 mEventConnection->stealReceiveChannel(mDataChannel.get());
43 }
44 }
45 }
46
~DisplayEventReceiver()47 DisplayEventReceiver::~DisplayEventReceiver() {
48 }
49
initCheck() const50 status_t DisplayEventReceiver::initCheck() const {
51 if (mDataChannel != nullptr)
52 return NO_ERROR;
53 return NO_INIT;
54 }
55
getFd() const56 int DisplayEventReceiver::getFd() const {
57 if (mDataChannel == nullptr)
58 return NO_INIT;
59
60 return mDataChannel->getFd();
61 }
62
setVsyncRate(uint32_t count)63 status_t DisplayEventReceiver::setVsyncRate(uint32_t count) {
64 if (int32_t(count) < 0)
65 return BAD_VALUE;
66
67 if (mEventConnection != nullptr) {
68 mEventConnection->setVsyncRate(count);
69 return NO_ERROR;
70 }
71 return NO_INIT;
72 }
73
requestNextVsync()74 status_t DisplayEventReceiver::requestNextVsync() {
75 if (mEventConnection != nullptr) {
76 mEventConnection->requestNextVsync();
77 return NO_ERROR;
78 }
79 return NO_INIT;
80 }
81
82
getEvents(DisplayEventReceiver::Event * events,size_t count)83 ssize_t DisplayEventReceiver::getEvents(DisplayEventReceiver::Event* events,
84 size_t count) {
85 return DisplayEventReceiver::getEvents(mDataChannel.get(), events, count);
86 }
87
getEvents(gui::BitTube * dataChannel,Event * events,size_t count)88 ssize_t DisplayEventReceiver::getEvents(gui::BitTube* dataChannel,
89 Event* events, size_t count)
90 {
91 return gui::BitTube::recvObjects(dataChannel, events, count);
92 }
93
sendEvents(gui::BitTube * dataChannel,Event const * events,size_t count)94 ssize_t DisplayEventReceiver::sendEvents(gui::BitTube* dataChannel,
95 Event const* events, size_t count)
96 {
97 return gui::BitTube::sendObjects(dataChannel, events, count);
98 }
99
100 // ---------------------------------------------------------------------------
101
102 }; // namespace android
103