3eb38cb33e
If h/w composer doesn't support vsync (version < 0.3) we "fake" it with a timer. Change-Id: I1e3be79f43c9631d1293ad7d6cf52f9bfc42d65b
111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_SURFACE_FLINGER_EVENT_THREAD_H
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#define ANDROID_SURFACE_FLINGER_EVENT_THREAD_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <gui/DisplayEventReceiver.h>
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#include <gui/IDisplayEventConnection.h>
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#include <utils/Errors.h>
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#include <utils/threads.h>
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#include <utils/SortedVector.h>
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#include "DisplayHardware/DisplayHardware.h"
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// ---------------------------------------------------------------------------
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namespace android {
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// ---------------------------------------------------------------------------
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class SurfaceFlinger;
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// ---------------------------------------------------------------------------
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class EventThread : public Thread, public DisplayHardware::VSyncHandler {
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class Connection : public BnDisplayEventConnection {
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public:
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Connection(const sp<EventThread>& eventThread);
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status_t postEvent(const DisplayEventReceiver::Event& event);
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// count >= 1 : continuous event. count is the vsync rate
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// count == 0 : one-shot event that has not fired
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// count ==-1 : one-shot event that fired this round / disabled
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// count ==-2 : one-shot event that fired the round before
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int32_t count;
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private:
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virtual ~Connection();
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virtual void onFirstRef();
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virtual sp<BitTube> getDataChannel() const;
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virtual void setVsyncRate(uint32_t count);
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virtual void requestNextVsync(); // asynchronous
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sp<EventThread> const mEventThread;
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sp<BitTube> const mChannel;
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};
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public:
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EventThread(const sp<SurfaceFlinger>& flinger);
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sp<Connection> createEventConnection() const;
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status_t registerDisplayEventConnection(const sp<Connection>& connection);
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status_t unregisterDisplayEventConnection(const wp<Connection>& connection);
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void setVsyncRate(uint32_t count, const sp<Connection>& connection);
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void requestNextVsync(const sp<Connection>& connection);
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nsecs_t getLastVSyncTimestamp() const;
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nsecs_t getVSyncPeriod() const;
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void dump(String8& result, char* buffer, size_t SIZE) const;
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private:
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virtual bool threadLoop();
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virtual status_t readyToRun();
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virtual void onFirstRef();
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virtual void onVSyncReceived(int, nsecs_t timestamp);
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void removeDisplayEventConnection(const wp<Connection>& connection);
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// constants
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sp<SurfaceFlinger> mFlinger;
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DisplayHardware& mHw;
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mutable Mutex mLock;
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mutable Condition mCondition;
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// protected by mLock
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SortedVector< wp<Connection> > mDisplayEventConnections;
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nsecs_t mLastVSyncTimestamp;
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nsecs_t mVSyncTimestamp;
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// main thread only
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size_t mDeliveredEvents;
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};
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// ---------------------------------------------------------------------------
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}; // namespace android
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// ---------------------------------------------------------------------------
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#endif /* ANDROID_SURFACE_FLINGER_EVENT_THREAD_H */
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