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 23 class DisplayEventDispatcher : public LooperCallback { 24 public: 25 explicit DisplayEventDispatcher( 26 const sp<Looper>& looper, 27 ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp, 28 ISurfaceComposer::ConfigChanged configChanged = 29 ISurfaceComposer::eConfigChangedSuppress); 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 38 protected: 39 virtual ~DisplayEventDispatcher() = default; 40 41 private: 42 sp<Looper> mLooper; 43 DisplayEventReceiver mReceiver; 44 bool mWaitingForVsync; 45 46 virtual void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count) = 0; 47 virtual void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId, 48 bool connected) = 0; 49 virtual void dispatchConfigChanged(nsecs_t timestamp, PhysicalDisplayId displayId, 50 int32_t configId, nsecs_t vsyncPeriod) = 0; 51 // AChoreographer-specific hook for processing null-events so that looper 52 // can be properly poked. 53 virtual void dispatchNullEvent(nsecs_t timestamp, PhysicalDisplayId displayId) = 0; 54 55 bool processPendingEvents(nsecs_t* outTimestamp, PhysicalDisplayId* outDisplayId, 56 uint32_t* outCount); 57 }; 58 } // namespace android 59