f0cf18d3ed
To measure end-to-end touch latency, we need to report the actual present time to ViewRootImpl. ViewRootImpl, in turn, will report this information to InputDispatcher. Finally, InputDispatcher will combine all known information for a specific input event, and will report this data to westworld. In another patch, we will add a new call, 'reportLatencyInfo', to InputPublisher. This call will allow the app to send this latency data to InputDispatcher. Bug: 169866723 Test: printed the input event present times inside ViewRootImpl Change-Id: Ibd3a2cfeb1a340eb15cd2165071df1f8589634af
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*
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* Copyright (C) 2016 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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#pragma once
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#include <utils/RefBase.h>
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namespace android {
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namespace uirenderer {
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class FrameMetricsObserver : public VirtualLightRefBase {
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public:
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virtual void notify(const int64_t* buffer) = 0;
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bool waitForPresentTime() const { return mWaitForPresentTime; };
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/**
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* Create a new metrics observer. An observer that watches present time gets notified at a
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* different time than the observer that doesn't.
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*
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* The observer that doesn't want present time is notified about metrics just after the frame
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* is completed. This is the default behaviour that's used by public API's.
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*
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* An observer that watches present time is notified about metrics after the actual display
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* present time is known.
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* WARNING! This observer may not receive metrics for the last several frames that the app
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* produces.
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*/
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FrameMetricsObserver(bool waitForPresentTime) : mWaitForPresentTime(waitForPresentTime) {}
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private:
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const bool mWaitForPresentTime;
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};
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} // namespace uirenderer
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} // namespace android
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