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Commit a9c4d556 authored by Alec Mouri's avatar Alec Mouri Committed by Ana Krulec
Browse files

[SurfaceFlinger] Split VSyncModulator into .cpp/.h files 

Future changes require this so that trace events can be added for this
class.

Bug: 133325345
Test: builds
Change-Id: I7b70a9df500b0fca5ae14e2b414d44ca11edf3ce
(cherry picked from commit b488afaa)
Merged-In: I7b70a9df500b0fca5ae14e2b414d44ca11edf3ce
parent 43c88661

services/surfaceflinger/Android.bp

+2 −1
Original line number Diff line number Diff line
@@ -149,9 +149,10 @@ filegroup { 
        "Scheduler/LayerHistory.cpp",

        "Scheduler/LayerInfo.cpp",

        "Scheduler/MessageQueue.cpp",

        "Scheduler/PhaseOffsets.cpp",

        "Scheduler/Scheduler.cpp",

        "Scheduler/SchedulerUtils.cpp",

        "Scheduler/PhaseOffsets.cpp",

        "Scheduler/VSyncModulator.cpp",

        "StartPropertySetThread.cpp",

        "SurfaceFlinger.cpp",

        "SurfaceInterceptor.cpp",

services/surfaceflinger/Scheduler/VSyncModulator.cpp

0 → 100644
+135 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2019 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



#include "VSyncModulator.h"



#include <cinttypes>

#include <mutex>



namespace android {



void VSyncModulator::setPhaseOffsets(Offsets early, Offsets earlyGl, Offsets late,

                                     nsecs_t thresholdForNextVsync) {

    mEarlyOffsets = early;

    mEarlyGlOffsets = earlyGl;

    mLateOffsets = late;

    mThresholdForNextVsync = thresholdForNextVsync;



    if (mSfConnectionHandle && late.sf != mOffsets.load().sf) {

        mScheduler->setPhaseOffset(mSfConnectionHandle, late.sf);

    }



    if (mAppConnectionHandle && late.app != mOffsets.load().app) {

        mScheduler->setPhaseOffset(mAppConnectionHandle, late.app);

    }

    mOffsets = late;

}



void VSyncModulator::setTransactionStart(Scheduler::TransactionStart transactionStart) {

    if (transactionStart == Scheduler::TransactionStart::EARLY) {

        mRemainingEarlyFrameCount = MIN_EARLY_FRAME_COUNT_TRANSACTION;

    }



    // An early transaction stays an early transaction.

    if (transactionStart == mTransactionStart ||

        mTransactionStart == Scheduler::TransactionStart::EARLY) {

        return;

    }

    mTransactionStart = transactionStart;

    updateOffsets();

}



void VSyncModulator::onTransactionHandled() {

    if (mTransactionStart == Scheduler::TransactionStart::NORMAL) return;

    mTransactionStart = Scheduler::TransactionStart::NORMAL;

    updateOffsets();

}



void VSyncModulator::onRefreshRateChangeInitiated() {

    if (mRefreshRateChangePending) {

        return;

    }

    mRefreshRateChangePending = true;

    updateOffsets();

}



void VSyncModulator::onRefreshRateChangeCompleted() {

    if (!mRefreshRateChangePending) {

        return;

    }

    mRefreshRateChangePending = false;

    updateOffsets();

}



void VSyncModulator::onRefreshed(bool usedRenderEngine) {

    bool updateOffsetsNeeded = false;

    if (mRemainingEarlyFrameCount > 0) {

        mRemainingEarlyFrameCount--;

        updateOffsetsNeeded = true;

    }

    if (usedRenderEngine) {

        mRemainingRenderEngineUsageCount = MIN_EARLY_GL_FRAME_COUNT_TRANSACTION;

        updateOffsetsNeeded = true;

    } else if (mRemainingRenderEngineUsageCount > 0) {

        mRemainingRenderEngineUsageCount--;

        updateOffsetsNeeded = true;

    }

    if (updateOffsetsNeeded) {

        updateOffsets();

    }

}



VSyncModulator::Offsets VSyncModulator::getOffsets() {

    // Early offsets are used if we're in the middle of a refresh rate

    // change, or if we recently begin a transaction.

    if (mTransactionStart == Scheduler::TransactionStart::EARLY || mRemainingEarlyFrameCount > 0 ||

        mRefreshRateChangePending) {

        return mEarlyOffsets;

    } else if (mRemainingRenderEngineUsageCount > 0) {

        return mEarlyGlOffsets;

    } else {

        return mLateOffsets;

    }

}



void VSyncModulator::updateOffsets() {

    const Offsets desired = getOffsets();

    const Offsets current = mOffsets;



    bool changed = false;

    if (desired.sf != current.sf) {

        if (mSfConnectionHandle != nullptr) {

            mScheduler->setPhaseOffset(mSfConnectionHandle, desired.sf);

        } else {

            mSfEventThread->setPhaseOffset(desired.sf);

        }

        changed = true;

    }

    if (desired.app != current.app) {

        if (mAppConnectionHandle != nullptr) {

            mScheduler->setPhaseOffset(mAppConnectionHandle, desired.app);

        } else {

            mAppEventThread->setPhaseOffset(desired.app);

        }

        changed = true;

    }



    if (changed) {

        mOffsets = desired;

    }

}



} // namespace android

services/surfaceflinger/Scheduler/VSyncModulator.h

+21 −106
Original line number Diff line number Diff line
@@ -16,8 +16,6 @@ 


#pragma once



#include <utils/Errors.h>



#include <cinttypes>

#include <mutex>
@@ -41,6 +39,8 @@ private: 
    const int MIN_EARLY_GL_FRAME_COUNT_TRANSACTION = 2;



public:

    // Wrapper for a collection of surfaceflinger/app offsets for a particular

    // configuration .

    struct Offsets {

        nsecs_t sf;

        nsecs_t app;
@@ -57,32 +57,21 @@ public: 
    // appEarlyGl: Like sfEarlyGl, but for the app-vsync.

    // appLate: The regular app vsync phase offset.

    void setPhaseOffsets(Offsets early, Offsets earlyGl, Offsets late,

                         nsecs_t thresholdForNextVsync) {

        mEarlyOffsets = early;

        mEarlyGlOffsets = earlyGl;

        mLateOffsets = late;

        mThresholdForNextVsync = thresholdForNextVsync;



        if (mSfConnectionHandle && late.sf != mOffsets.load().sf) {

            mScheduler->setPhaseOffset(mSfConnectionHandle, late.sf);

        }



        if (mAppConnectionHandle && late.app != mOffsets.load().app) {

            mScheduler->setPhaseOffset(mAppConnectionHandle, late.app);

        }



        mOffsets = late;

    }

                         nsecs_t thresholdForNextVsync);



    // Returns the configured early offsets.

    Offsets getEarlyOffsets() const { return mEarlyOffsets; }



    // Returns the configured early gl offsets.

    Offsets getEarlyGlOffsets() const { return mEarlyGlOffsets; }



    // Sets handles to the SF and app event threads.

    void setEventThreads(EventThread* sfEventThread, EventThread* appEventThread) {

        mSfEventThread = sfEventThread;

        mAppEventThread = appEventThread;

    }



    // Sets the scheduler and vsync connection handlers.

    void setSchedulerAndHandles(Scheduler* scheduler,

                                Scheduler::ConnectionHandle* appConnectionHandle,

                                Scheduler::ConnectionHandle* sfConnectionHandle) {
@@ -91,105 +80,31 @@ public: 
        mSfConnectionHandle = sfConnectionHandle;

    }



    void setTransactionStart(Scheduler::TransactionStart transactionStart) {

        if (transactionStart == Scheduler::TransactionStart::EARLY) {

            mRemainingEarlyFrameCount = MIN_EARLY_FRAME_COUNT_TRANSACTION;

        }

    // Signals that a transaction has started, and changes offsets accordingly.

    void setTransactionStart(Scheduler::TransactionStart transactionStart);



        // An early transaction stays an early transaction.

        if (transactionStart == mTransactionStart ||

            mTransactionStart == Scheduler::TransactionStart::EARLY) {

            return;

        }

        mTransactionStart = transactionStart;

        updateOffsets();

    }



    void onTransactionHandled() {

        if (mTransactionStart == Scheduler::TransactionStart::NORMAL) return;

        mTransactionStart = Scheduler::TransactionStart::NORMAL;

        updateOffsets();

    }

    // Signals that a transaction has been completed, so that we can finish

    // special handling for a transaction.

    void onTransactionHandled();



    // Called when we send a refresh rate change to hardware composer, so that

    // we can move into early offsets.

    void onRefreshRateChangeInitiated() {

        if (mRefreshRateChangePending) {

            return;

        }

        mRefreshRateChangePending = true;

        updateOffsets();

    }

    void onRefreshRateChangeInitiated();



    // Called when we detect from vsync signals that the refresh rate changed.

    // This way we can move out of early offsets if no longer necessary.

    void onRefreshRateChangeCompleted() {

        if (!mRefreshRateChangePending) {

            return;

        }

        mRefreshRateChangePending = false;

        updateOffsets();

    }

    void onRefreshRateChangeCompleted();



    void onRefreshed(bool usedRenderEngine) {

        bool updateOffsetsNeeded = false;

        if (mRemainingEarlyFrameCount > 0) {

            mRemainingEarlyFrameCount--;

            updateOffsetsNeeded = true;

        }

        if (usedRenderEngine) {

            mRemainingRenderEngineUsageCount = MIN_EARLY_GL_FRAME_COUNT_TRANSACTION;

            updateOffsetsNeeded = true;

        } else if (mRemainingRenderEngineUsageCount > 0) {

            mRemainingRenderEngineUsageCount--;

            updateOffsetsNeeded = true;

        }

    // Called when the display is presenting a new frame. usedRenderEngine

    // should be set to true if RenderEngine was involved with composing the new

    // frame.

    void onRefreshed(bool usedRenderEngine);



        if (updateOffsetsNeeded) {

            updateOffsets();

        }

    }



    Offsets getOffsets() {

        // Early offsets are used if we're in the middle of a refresh rate

        // change, or if we recently begin a transaction.

        if (mTransactionStart == Scheduler::TransactionStart::EARLY ||

            mRemainingEarlyFrameCount > 0 || mRefreshRateChangePending) {

            return mEarlyOffsets;

        } else if (mRemainingRenderEngineUsageCount > 0) {

            return mEarlyGlOffsets;

        } else {

            return mLateOffsets;

        }

    }

    // Returns the offsets that should be used.

    Offsets getOffsets();



private:

    void updateOffsets() {

        const Offsets desired = getOffsets();

        const Offsets current = mOffsets;



        bool changed = false;

        if (desired.sf != current.sf) {

            if (mSfConnectionHandle != nullptr) {

                mScheduler->setPhaseOffset(mSfConnectionHandle, desired.sf);

            } else {

                mSfEventThread->setPhaseOffset(desired.sf);

            }

            changed = true;

        }

        if (desired.app != current.app) {

            if (mAppConnectionHandle != nullptr) {

                mScheduler->setPhaseOffset(mAppConnectionHandle, desired.app);

            } else {

                mAppEventThread->setPhaseOffset(desired.app);

            }

            changed = true;

        }



        if (changed) {

            mOffsets = desired;

        }

    }

    void updateOffsets();



    Offsets mLateOffsets;

    Offsets mEarlyOffsets;