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