SF: Polish Fps class
For consistent comparison (which will later be changed to check ULP
distance instead of the magnitude-dependent threshold), express the
inequality operators in terms of equality, and avoid hashing floats.
Add Hz literals and (namespaced) operators.
Bug: 129481165
Bug: 185535769
Test: libsurfaceflinger_unittest
Test: dumpsys SurfaceFlinger --vsync
Change-Id: I79be5d2dd031218c4054774d2645efb337211538
diff --git a/services/surfaceflinger/Scheduler/LayerInfo.cpp b/services/surfaceflinger/Scheduler/LayerInfo.cpp
index 8a45b66..314526a 100644
--- a/services/surfaceflinger/Scheduler/LayerInfo.cpp
+++ b/services/surfaceflinger/Scheduler/LayerInfo.cpp
@@ -41,7 +41,7 @@
: mName(name),
mOwnerUid(ownerUid),
mDefaultVote(defaultVote),
- mLayerVote({defaultVote, Fps(0.0f)}),
+ mLayerVote({defaultVote, Fps()}),
mRefreshRateHistory(name) {}
void LayerInfo::setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now, LayerUpdateType updateType,
@@ -93,10 +93,11 @@
return false;
}
+ using fps_approx_ops::operator>=;
+
// Layer is considered frequent if the average frame rate is higher than the threshold
const auto totalTime = mFrameTimes.back().queueTime - it->queueTime;
- return Fps::fromPeriodNsecs(totalTime / (numFrames - 1))
- .greaterThanOrEqualWithMargin(kMinFpsForFrequentLayer);
+ return Fps::fromPeriodNsecs(totalTime / (numFrames - 1)) >= kMinFpsForFrequentLayer;
}
bool LayerInfo::isAnimating(nsecs_t now) const {
@@ -191,17 +192,17 @@
return std::nullopt;
}
- const auto averageFrameTime = calculateAverageFrameTime();
- if (averageFrameTime.has_value()) {
+ if (const auto averageFrameTime = calculateAverageFrameTime()) {
const auto refreshRate = Fps::fromPeriodNsecs(*averageFrameTime);
const bool refreshRateConsistent = mRefreshRateHistory.add(refreshRate, now);
if (refreshRateConsistent) {
const auto knownRefreshRate = refreshRateConfigs.findClosestKnownFrameRate(refreshRate);
- // To avoid oscillation, use the last calculated refresh rate if it is
- // close enough
+ using fps_approx_ops::operator!=;
+
+ // To avoid oscillation, use the last calculated refresh rate if it is close enough.
if (std::abs(mLastRefreshRate.calculated.getValue() - refreshRate.getValue()) >
MARGIN &&
- !mLastRefreshRate.reported.equalsWithMargin(knownRefreshRate)) {
+ mLastRefreshRate.reported != knownRefreshRate) {
mLastRefreshRate.calculated = refreshRate;
mLastRefreshRate.reported = knownRefreshRate;
}
@@ -228,15 +229,15 @@
if (isAnimating(now)) {
ALOGV("%s is animating", mName.c_str());
mLastRefreshRate.animatingOrInfrequent = true;
- return {LayerHistory::LayerVoteType::Max, Fps(0.0f)};
+ return {LayerHistory::LayerVoteType::Max, Fps()};
}
if (!isFrequent(now)) {
ALOGV("%s is infrequent", mName.c_str());
mLastRefreshRate.animatingOrInfrequent = true;
- // Infrequent layers vote for mininal refresh rate for
+ // Infrequent layers vote for minimal refresh rate for
// battery saving purposes and also to prevent b/135718869.
- return {LayerHistory::LayerVoteType::Min, Fps(0.0f)};
+ return {LayerHistory::LayerVoteType::Min, Fps()};
}
// If the layer was previously tagged as animating or infrequent, we clear
@@ -253,7 +254,7 @@
}
ALOGV("%s Max (can't resolve refresh rate)", mName.c_str());
- return {LayerHistory::LayerVoteType::Max, Fps(0.0f)};
+ return {LayerHistory::LayerVoteType::Max, Fps()};
}
const char* LayerInfo::getTraceTag(android::scheduler::LayerHistory::LayerVoteType type) const {
@@ -300,9 +301,13 @@
bool LayerInfo::RefreshRateHistory::isConsistent() const {
if (mRefreshRates.empty()) return true;
- const auto max = std::max_element(mRefreshRates.begin(), mRefreshRates.end());
- const auto min = std::min_element(mRefreshRates.begin(), mRefreshRates.end());
- const auto consistent =
+ const auto [min, max] =
+ std::minmax_element(mRefreshRates.begin(), mRefreshRates.end(),
+ [](const auto& lhs, const auto& rhs) {
+ return isStrictlyLess(lhs.refreshRate, rhs.refreshRate);
+ });
+
+ const bool consistent =
max->refreshRate.getValue() - min->refreshRate.getValue() < MARGIN_CONSISTENT_FPS;
if (CC_UNLIKELY(sTraceEnabled)) {
@@ -321,4 +326,4 @@
} // namespace android::scheduler
// TODO(b/129481165): remove the #pragma below and fix conversion issues
-#pragma clang diagnostic pop // ignored "-Wextra"
\ No newline at end of file
+#pragma clang diagnostic pop // ignored "-Wextra"