1 /*
2  * Copyright 2018 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 #pragma once
18 
19 #include <mutex>
20 
21 #include "EventThread.h"
22 
23 namespace android {
24 
25 /**
26  * VSync signals used during SurfaceFlinger trace playback (traces we captured
27  * with SurfaceInterceptor).
28  */
29 class InjectVSyncSource final : public VSyncSource {
30 public:
31     ~InjectVSyncSource() override = default;
32 
setCallback(VSyncSource::Callback * callback)33     void setCallback(VSyncSource::Callback* callback) override {
34         std::lock_guard<std::mutex> lock(mCallbackMutex);
35         mCallback = callback;
36     }
37 
onInjectSyncEvent(nsecs_t when,nsecs_t expectedVSyncTimestamp)38     void onInjectSyncEvent(nsecs_t when, nsecs_t expectedVSyncTimestamp) {
39         std::lock_guard<std::mutex> lock(mCallbackMutex);
40         if (mCallback) {
41             mCallback->onVSyncEvent(when, expectedVSyncTimestamp);
42         }
43     }
44 
getName()45     const char* getName() const override { return "inject"; }
setVSyncEnabled(bool)46     void setVSyncEnabled(bool) override {}
setPhaseOffset(nsecs_t)47     void setPhaseOffset(nsecs_t) override {}
dump(std::string &)48     void dump(std::string&) const override {}
49 
50 private:
51     std::mutex mCallbackMutex;
52     VSyncSource::Callback* mCallback GUARDED_BY(mCallbackMutex) = nullptr;
53 };
54 
55 } // namespace android
56