1 /*
2  * Copyright (C) 2024 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 "RefreshRateCalculator.h"
20 
21 #include "../EventQueue.h"
22 #include "../Utils.h"
23 
24 namespace android::hardware::graphics::composer {
25 
26 class InstantRefreshRateCalculator : public RefreshRateCalculator {
27 public:
28     InstantRefreshRateCalculator(EventQueue* eventQueue);
29 
30     InstantRefreshRateCalculator(EventQueue* eventQueue, int64_t maxValidTimeNs);
31 
32     int getRefreshRate() const override;
33 
34     void onPresentInternal(int64_t presentTimeNs, int flag) override;
35 
36     void reset() override;
37 
38     void setEnabled(bool isEnabled) final;
39 
40 private:
41     static constexpr int64_t kDefaultMaxValidTimeNs = 1000000000; // 1 second.
42 
43     InstantRefreshRateCalculator(const InstantRefreshRateCalculator&) = delete;
44     InstantRefreshRateCalculator& operator=(const InstantRefreshRateCalculator&) = delete;
45 
46     bool isOutdated(int64_t timeNs) const;
47 
48     void setNewRefreshRate(int newRefreshRate);
49 
50     int updateRefreshRate();
51 
52     EventQueue* mEventQueue;
53     VrrControllerEvent mTimeoutEvent;
54 
55     const int64_t mMaxValidTimeNs;
56 
57     int64_t mLastPresentTimeNs = kDefaultInvalidPresentTimeNs;
58     int mLastRefreshRate = kDefaultInvalidRefreshRate;
59 };
60 
61 } // namespace android::hardware::graphics::composer
62