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/BitTube.h>
22 #include <gui/DisplayEventReceiver.h>
23 #include <gui/IDisplayEventConnection.h>
24 #include <gui/ISurfaceComposer.h>
25
26 #include <private/gui/ComposerService.h>
27
28 // ---------------------------------------------------------------------------
29
30 namespace android {
31
32 // ---------------------------------------------------------------------------
33
DisplayEventReceiver()34 DisplayEventReceiver::DisplayEventReceiver() {
35 sp<ISurfaceComposer> sf(ComposerService::getComposerService());
36 if (sf != NULL) {
37 mEventConnection = sf->createDisplayEventConnection();
38 if (mEventConnection != NULL) {
39 mDataChannel = mEventConnection->getDataChannel();
40 }
41 }
42 }
43
~DisplayEventReceiver()44 DisplayEventReceiver::~DisplayEventReceiver() {
45 }
46
initCheck() const47 status_t DisplayEventReceiver::initCheck() const {
48 if (mDataChannel != NULL)
49 return NO_ERROR;
50 return NO_INIT;
51 }
52
getFd() const53 int DisplayEventReceiver::getFd() const {
54 if (mDataChannel == NULL)
55 return NO_INIT;
56
57 return mDataChannel->getFd();
58 }
59
setVsyncRate(uint32_t count)60 status_t DisplayEventReceiver::setVsyncRate(uint32_t count) {
61 if (int32_t(count) < 0)
62 return BAD_VALUE;
63
64 if (mEventConnection != NULL) {
65 mEventConnection->setVsyncRate(count);
66 return NO_ERROR;
67 }
68 return NO_INIT;
69 }
70
requestNextVsync()71 status_t DisplayEventReceiver::requestNextVsync() {
72 if (mEventConnection != NULL) {
73 mEventConnection->requestNextVsync();
74 return NO_ERROR;
75 }
76 return NO_INIT;
77 }
78
79
getEvents(DisplayEventReceiver::Event * events,size_t count)80 ssize_t DisplayEventReceiver::getEvents(DisplayEventReceiver::Event* events,
81 size_t count) {
82 return DisplayEventReceiver::getEvents(mDataChannel, events, count);
83 }
84
getEvents(const sp<BitTube> & dataChannel,Event * events,size_t count)85 ssize_t DisplayEventReceiver::getEvents(const sp<BitTube>& dataChannel,
86 Event* events, size_t count)
87 {
88 return BitTube::recvObjects(dataChannel, events, count);
89 }
90
sendEvents(const sp<BitTube> & dataChannel,Event const * events,size_t count)91 ssize_t DisplayEventReceiver::sendEvents(const sp<BitTube>& dataChannel,
92 Event const* events, size_t count)
93 {
94 return BitTube::sendObjects(dataChannel, events, count);
95 }
96
97 // ---------------------------------------------------------------------------
98
99 }; // namespace android
100