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 struct ExitIdleRefreshRateCalculatorParameters {
27     int64_t mIdleCriteriaTimeNs = 1000000000; // 1 second
28     int64_t mMaxValidTimeNs = 250000000;      // 250 ms
29 };
30 
31 class ExitIdleRefreshRateCalculator : public RefreshRateCalculator {
32 public:
33     ExitIdleRefreshRateCalculator(EventQueue* eventQueue);
34 
35     ExitIdleRefreshRateCalculator(EventQueue* eventQueue,
36                                   const ExitIdleRefreshRateCalculatorParameters& params);
37 
38     int getRefreshRate() const override;
39 
40     void onPowerStateChange(int from, int to) final;
41 
42     void onPresentInternal(int64_t presentTimeNs, int flag) override;
43 
44     void reset() override;
45 
46     void setEnabled(bool isEnabled) final;
47 
48 private:
49     ExitIdleRefreshRateCalculator(const ExitIdleRefreshRateCalculator&) = delete;
50     ExitIdleRefreshRateCalculator& operator=(const ExitIdleRefreshRateCalculator&) = delete;
51 
52     void setNewRefreshRate(int newRefreshRate);
53 
54     int invalidateRefreshRate();
55 
56     EventQueue* mEventQueue;
57     VrrControllerEvent mTimeoutEvent;
58 
59     const ExitIdleRefreshRateCalculatorParameters mParams;
60 
61     int64_t mLastPresentTimeNs = kDefaultInvalidPresentTimeNs;
62     int mLastRefreshRate = kDefaultInvalidRefreshRate;
63 };
64 
65 } // namespace android::hardware::graphics::composer
66