148 lines
4.9 KiB
C++
148 lines
4.9 KiB
C++
/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CPP_EVS_MANAGER_1_1_STATS_STATSCOLLECTOR_H_
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#define CPP_EVS_MANAGER_1_1_STATS_STATSCOLLECTOR_H_
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#include "CameraUsageStats.h"
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#include "IStatsCollector.h"
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#include "LooperWrapper.h"
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#include "VirtualCamera.h"
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#include <android-base/chrono_utils.h>
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#include <android-base/logging.h>
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#include <android-base/result.h>
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#include <android/hardware/automotive/evs/1.1/types.h>
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#include <utils/Mutex.h>
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#include <deque>
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#include <thread> // NOLINT
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#include <unordered_map>
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#include <vector>
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namespace android::automotive::evs::V1_1::implementation {
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enum CollectionEvent {
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INIT = 0,
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PERIODIC,
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CUSTOM_START,
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CUSTOM_END,
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TERMINATED,
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LAST_EVENT,
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};
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struct CollectionRecord {
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// Latest statistics collection
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CameraUsageStatsRecord latest = {};
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// History of collected statistics records
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std::deque<CameraUsageStatsRecord> history;
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};
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struct CollectionInfo {
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// Collection interval between two subsequent collections
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std::chrono::nanoseconds interval = 0ns;
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// The maximum number of records this collection stores
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size_t maxCacheSize = 0;
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// Time when the latest collection was done
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nsecs_t lastCollectionTime = 0;
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// Collected statistics records per instances
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std::unordered_map<std::string, CollectionRecord> records;
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};
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// Statistic collector for camera usage statistics.
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// Statistics are not collected until |startCollection|.
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class StatsCollector : public IStatsCollector, public MessageHandler {
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public:
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StatsCollector() :
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mLooper(new LooperWrapper()),
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mCurrentCollectionEvent(CollectionEvent::INIT),
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mPeriodicCollectionInfo({}),
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mCustomCollectionInfo({}) {}
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virtual ~StatsCollector();
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android::base::Result<void> startCollection() override;
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// Starts collecting CameraUsageStarts during a given duration at a given
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// interval.
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android::base::Result<void> startCustomCollection(std::chrono::nanoseconds interval,
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std::chrono::nanoseconds duration)
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EXCLUDES(mMutex) override;
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// Stops current custom collection and shows the result from the device with
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// a given unique id. If this is "all", all results will be returned.
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android::base::Result<std::string> stopCustomCollection(std::string id = "")
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EXCLUDES(mMutex) override;
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// Registers HalCamera object to monitor
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android::base::Result<void> registerClientToMonitor(const android::sp<HalCamera>& camera)
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EXCLUDES(mMutex) override;
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// Unregister HalCamera object.
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android::base::Result<void> unregisterClientToMonitor(const std::string& id)
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EXCLUDES(mMutex) override;
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// Returns a map that contains the latest statistics pulled from
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// currently active clients.
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std::unordered_map<std::string, std::string> toString(const char* indent = "") override;
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private:
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// Mutex to protect records
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mutable Mutex mMutex;
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// Looper to message the collection thread
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android::sp<LooperWrapper> mLooper;
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// Background thread to pull stats from the clients
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std::thread mCollectionThread;
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// Current state of the monitor
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CollectionEvent mCurrentCollectionEvent GUARDED_BY(mMutex);
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// Periodic collection information
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CollectionInfo mPeriodicCollectionInfo GUARDED_BY(mMutex);
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// A collection during the custom period the user sets
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CollectionInfo mCustomCollectionInfo GUARDED_BY(mMutex);
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// A list of HalCamera objects to monitor
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std::unordered_map<std::string,
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android::wp<HalCamera>> mClientsToMonitor GUARDED_BY(mMutex);
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// Handles the messages from the looper
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void handleMessage(const Message& message) override;
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// Handles each CollectionEvent
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android::base::Result<void> handleCollectionEvent(
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CollectionEvent event, CollectionInfo* info) EXCLUDES(mMutex);
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// Pulls the statistics from each active HalCamera objects and generates the
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// records
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android::base::Result<void> collectLocked(CollectionInfo* info) REQUIRES(mMutex);
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// Returns a string corresponding to a given collection event.
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std::string collectionEventToString(const CollectionEvent& event) const;
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};
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} // namespace android::automotive::evs::V1_1::implementation
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#endif // CPP_EVS_MANAGER_1_1_STATS_STATSCOLLECTOR_H_
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