DisplayEventDispatcher.h revision 34a0cdb98eb5561774ea4e7b3b602aad80c4a3cc 
1/*
2 * Copyright (C) 2015 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 <gui/DisplayEventReceiver.h>
18#include <utils/Log.h>
19#include <utils/Looper.h>
20
21namespace android {
22
23class DisplayEventDispatcher : public LooperCallback {
24public:
25    DisplayEventDispatcher(const sp<Looper>& looper,
26            ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp);
27
28    status_t initialize();
29    void dispose();
30    status_t scheduleVsync();
31
32protected:
33    virtual ~DisplayEventDispatcher() = default;
34
35private:
36    sp<Looper> mLooper;
37    DisplayEventReceiver mReceiver;
38    bool mWaitingForVsync;
39
40    virtual void dispatchVsync(nsecs_t timestamp, int32_t id, uint32_t count) = 0;
41    virtual void dispatchHotplug(nsecs_t timestamp, int32_t id, bool connected) = 0;
42
43    virtual int handleEvent(int receiveFd, int events, void* data);
44    bool processPendingEvents(nsecs_t* outTimestamp, int32_t* id, uint32_t* outCount);
45};
46}
47