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/*
* Copyright 2021 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 <android-base/thread_annotations.h>
#include <android/gui/IFpsListener.h>
#include <binder/IBinder.h>
#include <unordered_map>
#include "Clock.h"
#include "FrameTimeline/FrameTimeline.h"
#include "FrontEnd/LayerHierarchy.h"
#include "WpHash.h"
namespace android {
class Layer;
class SurfaceFlinger;
class FpsReporter : public IBinder::DeathRecipient {
public:
FpsReporter(frametimeline::FrameTimeline& frameTimeline,
std::unique_ptr<Clock> clock = std::make_unique<SteadyClock>());
// Dispatches updated layer fps values for the registered listeners
// This method promotes Layer weak pointers and performs layer stack traversals, so mStateLock
// must be held when calling this method.
void dispatchLayerFps(const frontend::LayerHierarchy&) EXCLUDES(mMutex);
// Override for IBinder::DeathRecipient
void binderDied(const wp<IBinder>&) override;
// Registers an Fps listener that listens to fps updates for the provided layer
void addListener(const sp<gui::IFpsListener>& listener, int32_t taskId);
// Deregisters an Fps listener
void removeListener(const sp<gui::IFpsListener>& listener);
private:
mutable std::mutex mMutex;
struct TrackedListener {
sp<gui::IFpsListener> listener;
int32_t taskId;
};
frametimeline::FrameTimeline& mFrameTimeline;
static const constexpr std::chrono::steady_clock::duration kMinDispatchDuration =
std::chrono::milliseconds(500);
std::unique_ptr<Clock> mClock;
std::chrono::steady_clock::time_point mLastDispatch;
std::unordered_map<wp<IBinder>, TrackedListener, WpHash> mListeners GUARDED_BY(mMutex);
};
} // namespace android
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