1 /* 2 * Copyright (C) 2011 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 #ifndef ANDROID_SURFACE_FLINGER_EVENT_THREAD_H 18 #define ANDROID_SURFACE_FLINGER_EVENT_THREAD_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 #include <gui/DisplayEventReceiver.h> 24 #include <gui/IDisplayEventConnection.h> 25 26 #include <hardware/hwcomposer_defs.h> 27 28 #include <utils/Errors.h> 29 #include <utils/threads.h> 30 #include <utils/SortedVector.h> 31 32 #include "DisplayHardware/PowerHAL.h" 33 34 // --------------------------------------------------------------------------- 35 namespace android { 36 // --------------------------------------------------------------------------- 37 38 class SurfaceFlinger; 39 class String8; 40 41 // --------------------------------------------------------------------------- 42 43 class EventThread : public Thread { 44 class Connection : public BnDisplayEventConnection { 45 public: 46 Connection(const sp<EventThread>& eventThread); 47 status_t postEvent(const DisplayEventReceiver::Event& event); 48 49 // count >= 1 : continuous event. count is the vsync rate 50 // count == 0 : one-shot event that has not fired 51 // count ==-1 : one-shot event that fired this round / disabled 52 int32_t count; 53 54 private: 55 virtual ~Connection(); 56 virtual void onFirstRef(); 57 virtual sp<BitTube> getDataChannel() const; 58 virtual void setVsyncRate(uint32_t count); 59 virtual void requestNextVsync(); // asynchronous 60 sp<EventThread> const mEventThread; 61 sp<BitTube> const mChannel; 62 }; 63 64 public: 65 66 EventThread(const sp<SurfaceFlinger>& flinger); 67 68 sp<Connection> createEventConnection() const; 69 status_t registerDisplayEventConnection(const sp<Connection>& connection); 70 71 void setVsyncRate(uint32_t count, const sp<Connection>& connection); 72 void requestNextVsync(const sp<Connection>& connection); 73 74 // called before the screen is turned off from main thread 75 void onScreenReleased(); 76 77 // called after the screen is turned on from main thread 78 void onScreenAcquired(); 79 80 // called when receiving a vsync event 81 void onVSyncReceived(int type, nsecs_t timestamp); 82 void onHotplugReceived(int type, bool connected); 83 84 Vector< sp<EventThread::Connection> > waitForEvent( 85 DisplayEventReceiver::Event* event); 86 87 void dump(String8& result, char* buffer, size_t SIZE) const; 88 89 private: 90 virtual bool threadLoop(); 91 virtual void onFirstRef(); 92 93 void removeDisplayEventConnection(const wp<Connection>& connection); 94 void enableVSyncLocked(); 95 void disableVSyncLocked(); 96 97 // constants 98 sp<SurfaceFlinger> mFlinger; 99 PowerHAL mPowerHAL; 100 101 mutable Mutex mLock; 102 mutable Condition mCondition; 103 104 // protected by mLock 105 SortedVector< wp<Connection> > mDisplayEventConnections; 106 Vector< DisplayEventReceiver::Event > mPendingEvents; 107 DisplayEventReceiver::Event mVSyncEvent[HWC_DISPLAY_TYPES_SUPPORTED]; 108 bool mUseSoftwareVSync; 109 110 // for debugging 111 bool mDebugVsyncEnabled; 112 }; 113 114 // --------------------------------------------------------------------------- 115 116 }; // namespace android 117 118 // --------------------------------------------------------------------------- 119 120 #endif /* ANDROID_SURFACE_FLINGER_EVENT_THREAD_H */ 121