| /* |
| * Copyright 2018 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. |
| */ |
| |
| #pragma once |
| |
| #include <array> |
| #include <cinttypes> |
| #include <cstdint> |
| #include <numeric> |
| #include <string> |
| #include <unordered_map> |
| |
| #include <utils/Timers.h> |
| |
| #include "LayerInfo.h" |
| #include "SchedulerUtils.h" |
| |
| namespace android { |
| namespace scheduler { |
| |
| /* |
| * This class represents information about layers that are considered current. We keep an |
| * unordered map between layer name and LayerInfo. |
| */ |
| class LayerHistory { |
| public: |
| // Handle for each layer we keep track of. |
| class LayerHandle { |
| public: |
| LayerHandle(LayerHistory& lh, int64_t id) : mId(id), mLayerHistory(lh) {} |
| ~LayerHandle() { mLayerHistory.destroyLayer(mId); } |
| |
| const int64_t mId; |
| |
| private: |
| LayerHistory& mLayerHistory; |
| }; |
| |
| LayerHistory(); |
| ~LayerHistory(); |
| |
| // When the layer is first created, register it. |
| std::unique_ptr<LayerHandle> createLayer(const std::string name, float minRefreshRate, |
| float maxRefreshRate); |
| |
| // Method for inserting layers and their requested present time into the unordered map. |
| void insert(const std::unique_ptr<LayerHandle>& layerHandle, nsecs_t presentTime, bool isHdr); |
| // Method for setting layer visibility |
| void setVisibility(const std::unique_ptr<LayerHandle>& layerHandle, bool visible); |
| |
| // Returns the desired refresh rate, which is a max refresh rate of all the current |
| // layers. See go/content-fps-detection-in-scheduler for more information. |
| std::pair<float, bool> getDesiredRefreshRateAndHDR(); |
| |
| // Clears all layer history. |
| void clearHistory(); |
| |
| // Removes the handle and the object from the map. |
| void destroyLayer(const int64_t id); |
| |
| private: |
| // Removes the layers that have been idle for a given amount of time from mLayerInfos. |
| void removeIrrelevantLayers() REQUIRES(mLock); |
| |
| // Information about currently active layers. |
| std::mutex mLock; |
| std::unordered_map<int64_t, std::shared_ptr<LayerInfo>> mActiveLayerInfos GUARDED_BY(mLock); |
| std::unordered_map<int64_t, std::shared_ptr<LayerInfo>> mInactiveLayerInfos GUARDED_BY(mLock); |
| |
| // Each layer has it's own ID. This variable keeps track of the count. |
| static std::atomic<int64_t> sNextId; |
| |
| // Flag whether to log layer FPS in systrace |
| bool mTraceEnabled = false; |
| }; |
| |
| } // namespace scheduler |
| } // namespace android |