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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "LayerInfo.h"
#include <algorithm>
#include <utility>
namespace android::scheduler {
LayerInfo::LayerInfo(float lowRefreshRate, float highRefreshRate)
: mLowRefreshRate(lowRefreshRate), mHighRefreshRate(highRefreshRate) {}
void LayerInfo::setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now) {
lastPresentTime = std::max(lastPresentTime, static_cast<nsecs_t>(0));
// Buffers can come with a present time far in the future. That keeps them relevant.
mLastUpdatedTime = std::max(lastPresentTime, now);
mPresentTimeHistory.insertPresentTime(mLastUpdatedTime);
if (mLastPresentTime == 0) {
// First frame
mLastPresentTime = lastPresentTime;
return;
}
const nsecs_t period = lastPresentTime - mLastPresentTime;
mLastPresentTime = lastPresentTime;
// Ignore time diff that are too high - those are stale values
if (period > MAX_ACTIVE_LAYER_PERIOD_NS.count()) return;
const float fps = std::min(1e9f / period, mHighRefreshRate);
mRefreshRateHistory.insertRefreshRate(fps);
}
} // namespace android::scheduler
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