1 /*
2  * Copyright 2023 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 <chrono>
20 
21 #include <utils/Timers.h>
22 
23 namespace android::scheduler {
24 
25 using namespace std::chrono_literals;
26 
27 // Phase offsets and work durations for SF and app deadlines from VSYNC.
28 struct VsyncConfig {
29     nsecs_t sfOffset;
30     nsecs_t appOffset;
31     std::chrono::nanoseconds sfWorkDuration;
32     std::chrono::nanoseconds appWorkDuration;
33 
34     bool operator==(const VsyncConfig& other) const {
35         return sfOffset == other.sfOffset && appOffset == other.appOffset &&
36                 sfWorkDuration == other.sfWorkDuration && appWorkDuration == other.appWorkDuration;
37     }
38 
39     bool operator!=(const VsyncConfig& other) const { return !(*this == other); }
40 
41     // The duration for which SF can delay a frame if it is considered early based on the
42     // VsyncConfig::appWorkDuration.
43     static constexpr std::chrono::nanoseconds kEarlyLatchMaxThreshold = 100ms;
44 };
45 
46 struct VsyncConfigSet {
47     VsyncConfig early;    // Used for early transactions, and during refresh rate change.
48     VsyncConfig earlyGpu; // Used during GPU composition.
49     VsyncConfig late;     // Default.
50     std::chrono::nanoseconds hwcMinWorkDuration; // Used for calculating the earliest present time.
51 
52     bool operator==(const VsyncConfigSet& other) const {
53         return early == other.early && earlyGpu == other.earlyGpu && late == other.late &&
54                 hwcMinWorkDuration == other.hwcMinWorkDuration;
55     }
56 
57     bool operator!=(const VsyncConfigSet& other) const { return !(*this == other); }
58 };
59 
60 } // namespace android::scheduler
61