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 struct VsyncEventData { 25 // The Vsync Id corresponsing to this vsync event. This will be used to 26 // populate ISurfaceComposer::setFrameTimelineVsync and 27 // SurfaceComposerClient::setFrameTimelineVsync 28 int64_t id = FrameTimelineInfo::INVALID_VSYNC_ID; 29 30 // The deadline in CLOCK_MONOTONIC that the app needs to complete its 31 // frame by (both on the CPU and the GPU) 32 int64_t deadlineTimestamp = std::numeric_limits<int64_t>::max(); 33 34 // The current frame interval in ns when this frame was scheduled. 35 int64_t frameInterval = 0; 36 }; 37 38 class DisplayEventDispatcher : public LooperCallback { 39 public: 40 explicit DisplayEventDispatcher( 41 const sp<Looper>& looper, 42 ISurfaceComposer::VsyncSource vsyncSource = ISurfaceComposer::eVsyncSourceApp, 43 ISurfaceComposer::EventRegistrationFlags eventRegistration = {}); 44 45 status_t initialize(); 46 void dispose(); 47 status_t scheduleVsync(); 48 void injectEvent(const DisplayEventReceiver::Event& event); 49 int getFd() const; 50 virtual int handleEvent(int receiveFd, int events, void* data); 51 52 protected: 53 virtual ~DisplayEventDispatcher() = default; 54 55 private: 56 sp<Looper> mLooper; 57 DisplayEventReceiver mReceiver; 58 bool mWaitingForVsync; 59 60 std::vector<FrameRateOverride> mFrameRateOverrides; 61 62 virtual void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count, 63 VsyncEventData vsyncEventData) = 0; 64 virtual void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId, 65 bool connected) = 0; 66 virtual void dispatchModeChanged(nsecs_t timestamp, PhysicalDisplayId displayId, int32_t modeId, 67 nsecs_t vsyncPeriod) = 0; 68 // AChoreographer-specific hook for processing null-events so that looper 69 // can be properly poked. 70 virtual void dispatchNullEvent(nsecs_t timestamp, PhysicalDisplayId displayId) = 0; 71 72 virtual void dispatchFrameRateOverrides(nsecs_t timestamp, PhysicalDisplayId displayId, 73 std::vector<FrameRateOverride> overrides) = 0; 74 75 bool processPendingEvents(nsecs_t* outTimestamp, PhysicalDisplayId* outDisplayId, 76 uint32_t* outCount, VsyncEventData* outVsyncEventData); 77 }; 78 } // namespace android 79