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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 <cinttypes>
#include <cstdint>
#include <numeric>
#include <string>
namespace android {
namespace scheduler {
LayerInfo::LayerInfo(const std::string name, float minRefreshRate, float maxRefreshRate)
: mName(name),
mMinRefreshDuration(1e9f / maxRefreshRate),
mLowActivityRefreshDuration(1e9f / minRefreshRate),
mRefreshRateHistory(mMinRefreshDuration) {}
LayerInfo::~LayerInfo() = default;
void LayerInfo::setLastPresentTime(nsecs_t lastPresentTime) {
std::lock_guard lock(mLock);
// Buffers can come with a present time far in the future. That keeps them relevant.
mLastUpdatedTime = std::max(lastPresentTime, systemTime());
mPresentTimeHistory.insertPresentTime(mLastUpdatedTime);
if (mLastPresentTime == 0) {
// First frame
mLastPresentTime = lastPresentTime;
return;
}
const nsecs_t timeDiff = lastPresentTime - mLastPresentTime;
mLastPresentTime = lastPresentTime;
// Ignore time diff that are too high - those are stale values
if (timeDiff > OBSOLETE_TIME_EPSILON_NS.count()) return;
const nsecs_t refreshDuration = std::max(timeDiff, mMinRefreshDuration);
const int fps = 1e9f / refreshDuration;
mRefreshRateHistory.insertRefreshRate(fps);
}
} // namespace scheduler
} // namespace android
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