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 <algorithm>
20 #include <utility>
21
22 namespace android::scheduler {
23
LayerInfo(float lowRefreshRate,float highRefreshRate)24 LayerInfo::LayerInfo(float lowRefreshRate, float highRefreshRate)
25 : mLowRefreshRate(lowRefreshRate), mHighRefreshRate(highRefreshRate) {}
26
setLastPresentTime(nsecs_t lastPresentTime,nsecs_t now)27 void LayerInfo::setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now) {
28 lastPresentTime = std::max(lastPresentTime, static_cast<nsecs_t>(0));
29
30 // Buffers can come with a present time far in the future. That keeps them relevant.
31 mLastUpdatedTime = std::max(lastPresentTime, now);
32 mPresentTimeHistory.insertPresentTime(mLastUpdatedTime);
33
34 if (mLastPresentTime == 0) {
35 // First frame
36 mLastPresentTime = lastPresentTime;
37 return;
38 }
39
40 const nsecs_t period = lastPresentTime - mLastPresentTime;
41 mLastPresentTime = lastPresentTime;
42 // Ignore time diff that are too high - those are stale values
43 if (period > MAX_ACTIVE_LAYER_PERIOD_NS.count()) return;
44
45 const float fps = std::min(1e9f / period, mHighRefreshRate);
46 mRefreshRateHistory.insertRefreshRate(fps);
47 }
48
49 } // namespace android::scheduler
50