1 /*
2 * Copyright 2019 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 "LayerInfo.h"
18
19 #include <cinttypes>
20 #include <cstdint>
21 #include <numeric>
22 #include <string>
23
24 namespace android {
25 namespace scheduler {
26
LayerInfo(const std::string name,float minRefreshRate,float maxRefreshRate)27 LayerInfo::LayerInfo(const std::string name, float minRefreshRate, float maxRefreshRate)
28 : mName(name),
29 mMinRefreshDuration(1e9f / maxRefreshRate),
30 mLowActivityRefreshDuration(1e9f / minRefreshRate),
31 mRefreshRateHistory(mMinRefreshDuration) {}
32
33 LayerInfo::~LayerInfo() = default;
34
setLastPresentTime(nsecs_t lastPresentTime)35 void LayerInfo::setLastPresentTime(nsecs_t lastPresentTime) {
36 std::lock_guard lock(mLock);
37
38 // Buffers can come with a present time far in the future. That keeps them relevant.
39 mLastUpdatedTime = std::max(lastPresentTime, systemTime());
40 mPresentTimeHistory.insertPresentTime(mLastUpdatedTime);
41
42 if (mLastPresentTime == 0) {
43 // First frame
44 mLastPresentTime = lastPresentTime;
45 return;
46 }
47
48 const nsecs_t timeDiff = lastPresentTime - mLastPresentTime;
49 mLastPresentTime = lastPresentTime;
50 // Ignore time diff that are too high - those are stale values
51 if (timeDiff > OBSOLETE_TIME_EPSILON_NS.count()) return;
52 const nsecs_t refreshDuration = std::max(timeDiff, mMinRefreshDuration);
53 const int fps = 1e9f / refreshDuration;
54 mRefreshRateHistory.insertRefreshRate(fps);
55 }
56
57 } // namespace scheduler
58 } // namespace android
59