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Commit 495751d9 authored by Ady Abraham's avatar Ady Abraham Committed by Automerger Merge Worker
Browse files

Merge "SurfaceFlinger: refresh rate calculation when no timestamps" into rvc-dev am: e7d62aa5 

Change-Id: I1b3566443fc19144fe6824bb30c967e1bba7be7b
parents 8fec2307 e7d62aa5

services/surfaceflinger/Scheduler/LayerInfoV2.cpp

+10 −3
Original line number Diff line number Diff line
@@ -111,21 +111,28 @@ std::optional<float> LayerInfoV2::calculateRefreshRateIfPossible() { 


    // Calculate the refresh rate by finding the average delta between frames

    nsecs_t totalPresentTimeDeltas = 0;

    int numFrames = 0;

    for (auto it = mFrameTimes.begin(); it != mFrameTimes.end() - 1; ++it) {

        // If there are no presentation timestamp provided we can't calculate the refresh rate

        if (it->presetTime == 0 || (it + 1)->presetTime == 0) {

            return std::nullopt;

            continue;

        }



        totalPresentTimeDeltas +=

                std::max(((it + 1)->presetTime - it->presetTime), mHighRefreshRatePeriod);

        numFrames++;

    }

    if (numFrames == 0) {

        return std::nullopt;

    }

    const float averageFrameTime =

            static_cast<float>(totalPresentTimeDeltas) / (mFrameTimes.size() - 1);

    const float averageFrameTime = static_cast<float>(totalPresentTimeDeltas) / numFrames;



    // Now once we calculated the refresh rate we need to make sure that all the frames we captured

    // are evenly distributed and we don't calculate the average across some burst of frames.

    for (auto it = mFrameTimes.begin(); it != mFrameTimes.end() - 1; ++it) {

        if (it->presetTime == 0 || (it + 1)->presetTime == 0) {

            continue;

        }

        const nsecs_t presentTimeDeltas =

                std::max(((it + 1)->presetTime - it->presetTime), mHighRefreshRatePeriod);

        if (std::abs(presentTimeDeltas - averageFrameTime) > 2 * averageFrameTime) {

services/surfaceflinger/tests/unittests/LayerHistoryTestV2.cpp

+41 −0
Original line number Diff line number Diff line
@@ -512,5 +512,46 @@ TEST_F(LayerHistoryTestV2, inactiveLayers) { 
    EXPECT_EQ(1, frequentLayerCount(time));

}



TEST_F(LayerHistoryTestV2, calculateRefreshRate30Hz) {

    const auto layer = createLayer();

    EXPECT_CALL(*layer, isVisible()).WillRepeatedly(Return(true));

    EXPECT_CALL(*layer, getFrameRateForLayerTree()).WillRepeatedly(Return(Layer::FrameRate()));



    EXPECT_EQ(1, layerCount());

    EXPECT_EQ(0, activeLayerCount());



    nsecs_t time = systemTime();

    const nsecs_t frameTime = 33'333'333;



    for (int i = 0; i < PRESENT_TIME_HISTORY_SIZE; i++) {

        time += frameTime;

        history().record(layer.get(), time, time);

    }

    ASSERT_EQ(1, history().summarize(time).size());

    EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, history().summarize(time)[0].vote);

    EXPECT_FLOAT_EQ(30.f, history().summarize(time)[0].desiredRefreshRate);

}



TEST_F(LayerHistoryTestV2, calculateRefreshRate30HzSkipTimestamp) {

    const auto layer = createLayer();

    EXPECT_CALL(*layer, isVisible()).WillRepeatedly(Return(true));

    EXPECT_CALL(*layer, getFrameRateForLayerTree()).WillRepeatedly(Return(Layer::FrameRate()));



    EXPECT_EQ(1, layerCount());

    EXPECT_EQ(0, activeLayerCount());



    nsecs_t time = systemTime();

    const nsecs_t frameTime = 33'333'333;



    for (int i = 0; i < PRESENT_TIME_HISTORY_SIZE; i++) {

        time += frameTime;

        const auto timestamp = (i == PRESENT_TIME_HISTORY_SIZE / 2) ? 0 : time;

        history().record(layer.get(), timestamp, time);

    }

    ASSERT_EQ(1, history().summarize(time).size());

    EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, history().summarize(time)[0].vote);

    EXPECT_FLOAT_EQ(30.f, history().summarize(time)[0].desiredRefreshRate);

}



} // namespace

} // namespace android::scheduler