1 /* 2 * Copyright (C) 2015 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 #include <gui/DisplayEventReceiver.h> 18 #include <utils/Log.h> 19 #include <utils/Looper.h> 20 21 namespace android { 22 using FrameRateOverride = DisplayEventReceiver::Event::FrameRateOverride; 23 24 class DisplayEventDispatcher : public LooperCallback { 25 public: 26 explicit DisplayEventDispatcher( 27 const sp<Looper>& looper, 28 ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp, 29 ISurfaceComposer::EventRegistrationFlags eventRegistration = {}); 30 31 status_t initialize(); 32 void dispose(); 33 status_t scheduleVsync(); 34 void injectEvent(const DisplayEventReceiver::Event& event); 35 int getFd() const; 36 virtual int handleEvent(int receiveFd, int events, void* data); 37 status_t getLatestVsyncEventData(ParcelableVsyncEventData* outVsyncEventData) const; 38 39 protected: 40 virtual ~DisplayEventDispatcher() = default; 41 42 private: 43 sp<Looper> mLooper; 44 DisplayEventReceiver mReceiver; 45 bool mWaitingForVsync; 46 uint32_t mLastVsyncCount; 47 nsecs_t mLastScheduleVsyncTime; 48 49 std::vector<FrameRateOverride> mFrameRateOverrides; 50 51 virtual void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count, 52 VsyncEventData vsyncEventData) = 0; 53 virtual void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId, 54 bool connected) = 0; 55 virtual void dispatchModeChanged(nsecs_t timestamp, PhysicalDisplayId displayId, int32_t modeId, 56 nsecs_t vsyncPeriod) = 0; 57 // AChoreographer-specific hook for processing null-events so that looper 58 // can be properly poked. 59 virtual void dispatchNullEvent(nsecs_t timestamp, PhysicalDisplayId displayId) = 0; 60 61 virtual void dispatchFrameRateOverrides(nsecs_t timestamp, PhysicalDisplayId displayId, 62 std::vector<FrameRateOverride> overrides) = 0; 63 64 bool processPendingEvents(nsecs_t* outTimestamp, PhysicalDisplayId* outDisplayId, 65 uint32_t* outCount, VsyncEventData* outVsyncEventData); 66 67 void populateFrameTimelines(const DisplayEventReceiver::Event& event, 68 VsyncEventData* outVsyncEventData) const; 69 }; 70 } // namespace android 71