7830c4464f
With Fuzzyfox removed, Now() does what NowUnfuzzed() did. Differential Revision: https://phabricator.services.mozilla.com/D119639
95 lines
3.9 KiB
C++
95 lines
3.9 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#include "RTCStatsReport.h"
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#include "mozilla/dom/Performance.h"
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#include "mozilla/dom/PerformanceService.h"
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#include "nsRFPService.h"
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namespace mozilla::dom {
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RTCStatsTimestampMaker::RTCStatsTimestampMaker(const GlobalObject* aGlobal) {
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nsCOMPtr<nsPIDOMWindowInner> window =
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do_QueryInterface(aGlobal->GetAsSupports());
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if (window) {
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mRandomTimelineSeed = window->GetPerformance()->GetRandomTimelineSeed();
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mStartMonotonic = window->GetPerformance()->CreationTimeStamp();
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// Ugh. Performance::TimeOrigin is not constant, which means we need to
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// emulate this weird behavior so our time stamps are consistent with JS
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// timeOrigin. This is based on the code here:
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// https://searchfox.org/mozilla-central/rev/
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// 053826b10f838f77c27507e5efecc96e34718541/dom/performance/Performance.cpp#111-117
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mStartWallClockRaw =
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PerformanceService::GetOrCreate()->TimeOrigin(mStartMonotonic);
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MOZ_ASSERT(window->AsGlobal());
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mCrossOriginIsolated = window->AsGlobal()->CrossOriginIsolated();
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}
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}
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DOMHighResTimeStamp RTCStatsTimestampMaker::GetNow() const {
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// webrtc-pc says to use performance.timeOrigin + performance.now(), but
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// keeping a Performance object around is difficult because it is
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// main-thread-only. So, we perform the same calculation here. Note that this
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// can be very different from the current wall-clock time because of changes
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// to the wall clock, or monotonic clock drift over long periods of time.
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// We are very careful to do exactly what Performance does, to avoid timestamp
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// discrepancies.
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DOMHighResTimeStamp msSinceStart =
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(TimeStamp::Now() - mStartMonotonic).ToMilliseconds();
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// mRandomTimelineSeed is not set in the unit-tests.
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if (mRandomTimelineSeed) {
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msSinceStart = nsRFPService::ReduceTimePrecisionAsMSecs(
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msSinceStart, mRandomTimelineSeed, /* aIsSystemPrincipal */ false,
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mCrossOriginIsolated);
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}
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return msSinceStart + nsRFPService::ReduceTimePrecisionAsMSecs(
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mStartWallClockRaw, 0,
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/* aIsSystemPrincipal */ false,
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mCrossOriginIsolated);
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}
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(RTCStatsReport, mParent)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(RTCStatsReport, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(RTCStatsReport, Release)
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RTCStatsReport::RTCStatsReport(nsPIDOMWindowInner* aParent)
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: mParent(aParent) {}
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/*static*/
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already_AddRefed<RTCStatsReport> RTCStatsReport::Constructor(
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const GlobalObject& aGlobal) {
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nsCOMPtr<nsPIDOMWindowInner> window(
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do_QueryInterface(aGlobal.GetAsSupports()));
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RefPtr<RTCStatsReport> report(new RTCStatsReport(window));
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return report.forget();
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}
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JSObject* RTCStatsReport::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return RTCStatsReport_Binding::Wrap(aCx, this, aGivenProto);
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}
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void RTCStatsReport::Incorporate(RTCStatsCollection& aStats) {
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SetRTCStats(aStats.mIceCandidatePairStats);
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SetRTCStats(aStats.mIceCandidateStats);
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SetRTCStats(aStats.mInboundRtpStreamStats);
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SetRTCStats(aStats.mOutboundRtpStreamStats);
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SetRTCStats(aStats.mRemoteInboundRtpStreamStats);
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SetRTCStats(aStats.mRemoteOutboundRtpStreamStats);
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SetRTCStats(aStats.mRtpContributingSourceStats);
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SetRTCStats(aStats.mTrickledIceCandidateStats);
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SetRTCStats(aStats.mDataChannelStats);
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}
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void RTCStatsReport::Set(const nsAString& aKey, JS::Handle<JSObject*> aValue,
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ErrorResult& aRv) {
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RTCStatsReport_Binding::MaplikeHelpers::Set(this, aKey, aValue, aRv);
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}
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} // namespace mozilla::dom
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