1 /* 2 * Copyright 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <android-base/thread_annotations.h> 20 #include <android/gui/IFpsListener.h> 21 #include <binder/IBinder.h> 22 23 #include <unordered_map> 24 25 #include "Clock.h" 26 #include "FrameTimeline/FrameTimeline.h" 27 #include "WpHash.h" 28 29 namespace android { 30 31 class Layer; 32 class SurfaceFlinger; 33 34 class FpsReporter : public IBinder::DeathRecipient { 35 public: 36 FpsReporter(frametimeline::FrameTimeline& frameTimeline, SurfaceFlinger& flinger, 37 std::unique_ptr<Clock> clock = std::make_unique<SteadyClock>()); 38 39 // Dispatches updated layer fps values for the registered listeners 40 // This method promotes Layer weak pointers and performs layer stack traversals, so mStateLock 41 // must be held when calling this method. 42 void dispatchLayerFps() EXCLUDES(mMutex); 43 44 // Override for IBinder::DeathRecipient 45 void binderDied(const wp<IBinder>&) override; 46 47 // Registers an Fps listener that listens to fps updates for the provided layer 48 void addListener(const sp<gui::IFpsListener>& listener, int32_t taskId); 49 // Deregisters an Fps listener 50 void removeListener(const sp<gui::IFpsListener>& listener); 51 52 private: 53 mutable std::mutex mMutex; 54 55 struct TrackedListener { 56 sp<gui::IFpsListener> listener; 57 int32_t taskId; 58 }; 59 60 frametimeline::FrameTimeline& mFrameTimeline; 61 SurfaceFlinger& mFlinger; 62 static const constexpr std::chrono::steady_clock::duration kMinDispatchDuration = 63 std::chrono::milliseconds(500); 64 std::unique_ptr<Clock> mClock; 65 std::chrono::steady_clock::time_point mLastDispatch; 66 std::unordered_map<wp<IBinder>, TrackedListener, WpHash> mListeners GUARDED_BY(mMutex); 67 }; 68 69 } // namespace android