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core/renderjournal: tweak render time prediction to reduce latency slower

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This makes it a bit more conservative for reducing latency, which decreases the
amount of dropped frames in desktop usage a lot (by 13x on my desktop, 2x on my laptop)
This commit is contained in:
Xaver Hugl 2024-05-22 16:52:48 +02:00
parent c65f01e5dc
commit 1866e70fe3
1 changed files with 3 additions and 3 deletions
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6
src/core/renderjournal.cpp
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@ -25,13 +25,13 @@ void RenderJournal::add(std::chrono::nanoseconds renderTime, std::chrono::nanose
const auto timeDifference = m_lastAdd ? presentationTimestamp - *m_lastAdd : 10s;
m_lastAdd = presentationTimestamp;
static constexpr std::chrono::nanoseconds varianceTimeConstant = 3s;
const double varianceRatio = std::clamp(timeDifference.count() / double(varianceTimeConstant.count()), 0.1, 1.0);
static constexpr std::chrono::nanoseconds varianceTimeConstant = 6s;
const double varianceRatio = std::clamp(timeDifference.count() / double(varianceTimeConstant.count()), 0.001, 0.1);
const auto renderTimeDiff = std::max(renderTime - m_result, 0ns);
m_variance = std::max(mix(renderTimeDiff, m_variance, varianceRatio), renderTimeDiff);
static constexpr std::chrono::nanoseconds timeConstant = 500ms;
const double ratio = std::clamp(timeDifference.count() / double(timeConstant.count()), 0.1, 1.0);
const double ratio = std::clamp(timeDifference.count() / double(timeConstant.count()), 0.01, 1.0);
m_result = mix(renderTime, m_result, ratio);
}