505e730e7d
In some conditions of scheduling delays, Choreographer may synthetically advance the indented vsync time. In that case we can't send a vsync id since there is no one that corresponds to that time. Test: TBD Bug: 191840734 Change-Id: I7b2754d5dcb0a3f5fd6cda00a3a2469041116f67
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
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* Copyright (C) 2014 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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#include "TimeLord.h"
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#include <limits>
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#include "FrameInfo.h"
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namespace android {
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namespace uirenderer {
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namespace renderthread {
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TimeLord::TimeLord()
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: mFrameIntervalNanos(milliseconds_to_nanoseconds(16))
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, mFrameTimeNanos(0)
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, mFrameIntendedTimeNanos(0)
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, mFrameVsyncId(UiFrameInfoBuilder::INVALID_VSYNC_ID)
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, mFrameDeadline(std::numeric_limits<int64_t>::max()) {}
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bool TimeLord::vsyncReceived(nsecs_t vsync, nsecs_t intendedVsync, int64_t vsyncId,
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int64_t frameDeadline, nsecs_t frameInterval) {
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if (intendedVsync > mFrameIntendedTimeNanos) {
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mFrameIntendedTimeNanos = intendedVsync;
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// The intendedVsync might have been advanced to account for scheduling
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// jitter. Since we don't have a way to advance the vsync id we just
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// reset it.
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mFrameVsyncId = (vsyncId > mFrameVsyncId) ? vsyncId : UiFrameInfoBuilder::INVALID_VSYNC_ID;
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mFrameDeadline = frameDeadline;
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if (frameInterval > 0) {
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mFrameIntervalNanos = frameInterval;
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}
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}
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if (vsync > mFrameTimeNanos) {
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mFrameTimeNanos = vsync;
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return true;
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}
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return false;
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}
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nsecs_t TimeLord::computeFrameTimeNanos() {
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// Logic copied from Choreographer.java
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nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
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nsecs_t jitterNanos = now - mFrameTimeNanos;
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if (jitterNanos >= mFrameIntervalNanos) {
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nsecs_t lastFrameOffset = jitterNanos % mFrameIntervalNanos;
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mFrameTimeNanos = now - lastFrameOffset;
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// mFrameVsyncId is not adjusted here as we still want to send
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// the vsync id that started this frame to the Surface Composer
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}
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return mFrameTimeNanos;
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}
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} /* namespace renderthread */
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} /* namespace uirenderer */
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} /* namespace android */
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