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0a2e28d797
* Revert "[fuchsia] Fix alignment of Fuchsia/non-Fuchsia tracing (#9289)" This reverts commit f80ac5f571479053b134e60bca77603269b2ce2a. * Revert "Align fuchsia and non-fuchsia tracing (#9199)" This reverts commit 78265484623037c6544dfd5380367bca29fa27b0.
90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "vsync_waiter.h"
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#include <lib/async/default.h>
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#include "flutter/fml/trace_event.h"
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#include "vsync_recorder.h"
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namespace flutter_runner {
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VsyncWaiter::VsyncWaiter(std::string debug_label,
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zx_handle_t session_present_handle,
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flutter::TaskRunners task_runners)
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: flutter::VsyncWaiter(task_runners),
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debug_label_(std::move(debug_label)),
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session_wait_(session_present_handle, SessionPresentSignal),
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weak_factory_(this) {
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auto wait_handler = [&](async_dispatcher_t* dispatcher, //
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async::Wait* wait, //
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zx_status_t status, //
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const zx_packet_signal_t* signal //
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) {
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if (status != ZX_OK) {
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FML_LOG(ERROR) << "Vsync wait failed.";
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return;
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}
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wait->Cancel();
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FireCallbackNow();
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};
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session_wait_.set_handler(wait_handler);
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}
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VsyncWaiter::~VsyncWaiter() {
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session_wait_.Cancel();
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}
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static fml::TimePoint SnapToNextPhase(fml::TimePoint value,
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fml::TimePoint phase,
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fml::TimeDelta interval) {
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fml::TimeDelta offset = (phase - value) % interval;
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if (offset < fml::TimeDelta::Zero()) {
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offset = offset + interval;
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}
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return value + offset;
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}
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void VsyncWaiter::AwaitVSync() {
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VsyncInfo vsync_info = VsyncRecorder::GetInstance().GetCurrentVsyncInfo();
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fml::TimePoint now = fml::TimePoint::Now();
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fml::TimePoint next_vsync = SnapToNextPhase(now, vsync_info.presentation_time,
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vsync_info.presentation_interval);
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task_runners_.GetUITaskRunner()->PostDelayedTask(
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[self = weak_factory_.GetWeakPtr()] {
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if (self) {
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self->FireCallbackWhenSessionAvailable();
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}
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},
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next_vsync - now);
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}
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void VsyncWaiter::FireCallbackWhenSessionAvailable() {
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TRACE_EVENT0("flutter", "VsyncWaiter::FireCallbackWhenSessionAvailable");
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FML_DCHECK(task_runners_.GetUITaskRunner()->RunsTasksOnCurrentThread());
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if (session_wait_.Begin(async_get_default_dispatcher()) != ZX_OK) {
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FML_LOG(ERROR) << "Could not begin wait for Vsync.";
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}
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}
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void VsyncWaiter::FireCallbackNow() {
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FML_DCHECK(task_runners_.GetUITaskRunner()->RunsTasksOnCurrentThread());
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VsyncInfo vsync_info = VsyncRecorder::GetInstance().GetCurrentVsyncInfo();
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fml::TimePoint now = fml::TimePoint::Now();
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fml::TimePoint next_vsync = SnapToNextPhase(now, vsync_info.presentation_time,
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vsync_info.presentation_interval);
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fml::TimePoint previous_vsync = next_vsync - vsync_info.presentation_interval;
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FireCallback(previous_vsync, next_vsync);
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}
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} // namespace flutter_runner
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