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/*
* Copyright 2020 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.
*/
#undef LOG_TAG
#define LOG_TAG "LayerHistoryV2"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
#include "LayerHistory.h"
#include <cutils/properties.h>
#include <utils/Log.h>
#include <utils/Timers.h>
#include <utils/Trace.h>
#include <algorithm>
#include <cmath>
#include <string>
#include <utility>
#include "../Layer.h"
#include "SchedulerUtils.h"
#include "LayerInfoV2.h"
namespace android::scheduler::impl {
namespace {
bool isLayerActive(const Layer& layer, const LayerInfoV2& info, nsecs_t threshold) {
// Layers with an explicit vote are always kept active
if (layer.getFrameRateForLayerTree().rate > 0) {
return true;
}
return layer.isVisible() && info.getLastUpdatedTime() >= threshold;
}
bool traceEnabled() {
return property_get_bool("debug.sf.layer_history_trace", false);
}
bool useFrameRatePriority() {
char value[PROPERTY_VALUE_MAX];
property_get("debug.sf.use_frame_rate_priority", value, "1");
return atoi(value);
}
void trace(const wp<Layer>& weak, const LayerInfoV2& info, LayerHistory::LayerVoteType type,
int fps) {
const auto layer = weak.promote();
if (!layer) return;
const auto traceType = [&](LayerHistory::LayerVoteType checkedType, int value) {
ATRACE_INT(info.getTraceTag(checkedType), type == checkedType ? value : 0);
};
traceType(LayerHistory::LayerVoteType::NoVote, 1);
traceType(LayerHistory::LayerVoteType::Heuristic, fps);
traceType(LayerHistory::LayerVoteType::ExplicitDefault, fps);
traceType(LayerHistory::LayerVoteType::ExplicitExactOrMultiple, fps);
traceType(LayerHistory::LayerVoteType::Min, 1);
traceType(LayerHistory::LayerVoteType::Max, 1);
ALOGD("%s: %s @ %d Hz", __FUNCTION__, layer->getName().c_str(), fps);
}
} // namespace
LayerHistoryV2::LayerHistoryV2(const scheduler::RefreshRateConfigs& refreshRateConfigs)
: mTraceEnabled(traceEnabled()), mUseFrameRatePriority(useFrameRatePriority()) {
LayerInfoV2::setTraceEnabled(mTraceEnabled);
LayerInfoV2::setRefreshRateConfigs(refreshRateConfigs);
}
LayerHistoryV2::~LayerHistoryV2() = default;
void LayerHistoryV2::registerLayer(Layer* layer, float /*lowRefreshRate*/, float highRefreshRate,
LayerVoteType type) {
const nsecs_t highRefreshRatePeriod = static_cast<nsecs_t>(1e9f / highRefreshRate);
auto info = std::make_unique<LayerInfoV2>(layer->getName(), highRefreshRatePeriod, type);
std::lock_guard lock(mLock);
mLayerInfos.emplace_back(layer, std::move(info));
}
void LayerHistoryV2::record(Layer* layer, nsecs_t presentTime, nsecs_t now,
LayerUpdateType updateType) {
std::lock_guard lock(mLock);
const auto it = std::find_if(mLayerInfos.begin(), mLayerInfos.end(),
[layer](const auto& pair) { return pair.first == layer; });
LOG_FATAL_IF(it == mLayerInfos.end(), "%s: unknown layer %p", __FUNCTION__, layer);
const auto& info = it->second;
info->setLastPresentTime(presentTime, now, updateType, mConfigChangePending);
// Activate layer if inactive.
if (const auto end = activeLayers().end(); it >= end) {
std::iter_swap(it, end);
mActiveLayersEnd++;
}
}
LayerHistoryV2::Summary LayerHistoryV2::summarize(nsecs_t now) {
LayerHistory::Summary summary;
std::lock_guard lock(mLock);
partitionLayers(now);
for (const auto& [layer, info] : activeLayers()) {
const auto strong = layer.promote();
if (!strong) {
continue;
}
const auto frameRateSelectionPriority = strong->getFrameRateSelectionPriority();
const auto layerFocused = Layer::isLayerFocusedBasedOnPriority(frameRateSelectionPriority);
ALOGV("%s has priority: %d %s focused", strong->getName().c_str(),
frameRateSelectionPriority, layerFocused ? "" : "not");
const auto [type, refreshRate] = info->getRefreshRate(now);
// Skip NoVote layer as those don't have any requirements
if (type == LayerHistory::LayerVoteType::NoVote) {
continue;
}
// Compute the layer's position on the screen
const Rect bounds = Rect(strong->getBounds());
const ui::Transform transform = strong->getTransform();
constexpr bool roundOutwards = true;
Rect transformed = transform.transform(bounds, roundOutwards);
const float layerArea = transformed.getWidth() * transformed.getHeight();
float weight = mDisplayArea ? layerArea / mDisplayArea : 0.0f;
summary.push_back({strong->getName(), type, refreshRate, weight, layerFocused});
if (CC_UNLIKELY(mTraceEnabled)) {
trace(layer, *info, type, static_cast<int>(std::round(refreshRate)));
}
}
return summary;
}
void LayerHistoryV2::partitionLayers(nsecs_t now) {
const nsecs_t threshold = getActiveLayerThreshold(now);
// Collect expired and inactive layers after active layers.
size_t i = 0;
while (i < mActiveLayersEnd) {
auto& [weak, info] = mLayerInfos[i];
if (const auto layer = weak.promote(); layer && isLayerActive(*layer, *info, threshold)) {
i++;
// Set layer vote if set
const auto frameRate = layer->getFrameRateForLayerTree();
const auto voteType = [&]() {
switch (frameRate.type) {
case Layer::FrameRateCompatibility::Default:
return LayerVoteType::ExplicitDefault;
case Layer::FrameRateCompatibility::ExactOrMultiple:
return LayerVoteType::ExplicitExactOrMultiple;
case Layer::FrameRateCompatibility::NoVote:
return LayerVoteType::NoVote;
}
}();
if (frameRate.rate > 0 || voteType == LayerVoteType::NoVote) {
const auto type = layer->isVisible() ? voteType : LayerVoteType::NoVote;
info->setLayerVote(type, frameRate.rate);
} else {
info->resetLayerVote();
}
continue;
}
if (CC_UNLIKELY(mTraceEnabled)) {
trace(weak, *info, LayerHistory::LayerVoteType::NoVote, 0);
}
info->onLayerInactive(now);
std::swap(mLayerInfos[i], mLayerInfos[--mActiveLayersEnd]);
}
// Collect expired layers after inactive layers.
size_t end = mLayerInfos.size();
while (i < end) {
if (mLayerInfos[i].first.promote()) {
i++;
} else {
std::swap(mLayerInfos[i], mLayerInfos[--end]);
}
}
mLayerInfos.erase(mLayerInfos.begin() + static_cast<long>(end), mLayerInfos.end());
}
void LayerHistoryV2::clear() {
std::lock_guard lock(mLock);
for (const auto& [layer, info] : activeLayers()) {
info->clearHistory(systemTime());
}
}
} // namespace android::scheduler::impl
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