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fune/dom/html/HTMLVideoElement.cpp
Emilio Cobos Álvarez d39e78a02e Bug 1883435 - Don't include GleanMetrics.h from Document.h. r=chutten,necko-reviewers,valentin 
In bug 1883435 comment 2 chutten mentions that including
nsGlobalWindowInner.h from GleanMetrics.h causes a stylo build failure.

This is because nsGlobalWindowInner.h itself brings a bunch of DOM
bindings template soup that bindgen isn't great at dealing with.

That can be fixed in various ways. However, there is a simpler fix,
which is not including GleanMetrics at all.

It's trivial to do, and given it's a massive autogenerated file, and
Document.h is a very common header, it's worth doing this if only for
build times.

Fix a bunch of unused includes while at it.

Differential Revision: https://phabricator.services.mozilla.com/D203625
2024-03-05 17:54:14 +00:00

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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 http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/HTMLVideoElement.h"
#include "mozilla/AppShutdown.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/dom/HTMLVideoElementBinding.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsSize.h"
#include "nsError.h"
#include "nsIHttpChannel.h"
#include "nsNodeInfoManager.h"
#include "plbase64.h"
#include "prlock.h"
#include "nsRFPService.h"
#include "nsThreadUtils.h"
#include "ImageContainer.h"
#include "VideoFrameContainer.h"
#include "VideoOutput.h"
#include "FrameStatistics.h"
#include "MediaError.h"
#include "MediaDecoder.h"
#include "MediaDecoderStateMachine.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/WakeLock.h"
#include "mozilla/dom/power/PowerManagerService.h"
#include "mozilla/dom/Performance.h"
#include "mozilla/dom/TimeRanges.h"
#include "mozilla/dom/VideoPlaybackQuality.h"
#include "mozilla/dom/VideoStreamTrack.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/Unused.h"
#include <algorithm>
#include <limits>
extern mozilla::LazyLogModule gMediaElementLog;
#define LOG(msg, ...) \
MOZ_LOG(gMediaElementLog, LogLevel::Debug, \
("HTMLVideoElement=%p, " msg, this, ##__VA_ARGS__))
nsGenericHTMLElement* NS_NewHTMLVideoElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
mozilla::dom::FromParser aFromParser) {
RefPtr<mozilla::dom::NodeInfo> nodeInfo(aNodeInfo);
auto* nim = nodeInfo->NodeInfoManager();
mozilla::dom::HTMLVideoElement* element =
new (nim) mozilla::dom::HTMLVideoElement(nodeInfo.forget());
element->Init();
return element;
}
namespace mozilla::dom {
nsresult HTMLVideoElement::Clone(mozilla::dom::NodeInfo* aNodeInfo,
nsINode** aResult) const {
*aResult = nullptr;
RefPtr<mozilla::dom::NodeInfo> ni(aNodeInfo);
auto* nim = ni->NodeInfoManager();
HTMLVideoElement* it = new (nim) HTMLVideoElement(ni.forget());
it->Init();
nsCOMPtr<nsINode> kungFuDeathGrip = it;
nsresult rv = const_cast<HTMLVideoElement*>(this)->CopyInnerTo(it);
if (NS_SUCCEEDED(rv)) {
kungFuDeathGrip.swap(*aResult);
}
return rv;
}
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLVideoElement,
HTMLMediaElement)
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLVideoElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(HTMLVideoElement)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mVisualCloneTarget)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mVisualCloneTargetPromise)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mVisualCloneSource)
tmp->mSecondaryVideoOutput = nullptr;
NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(HTMLMediaElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLVideoElement,
HTMLMediaElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVisualCloneTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVisualCloneTargetPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVisualCloneSource)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
HTMLVideoElement::HTMLVideoElement(already_AddRefed<NodeInfo>&& aNodeInfo)
: HTMLMediaElement(std::move(aNodeInfo)),
mVideoWatchManager(this, AbstractThread::MainThread()) {
DecoderDoctorLogger::LogConstruction(this);
}
HTMLVideoElement::~HTMLVideoElement() {
mVideoWatchManager.Shutdown();
DecoderDoctorLogger::LogDestruction(this);
}
void HTMLVideoElement::UpdateMediaSize(const nsIntSize& aSize) {
HTMLMediaElement::UpdateMediaSize(aSize);
// If we have a clone target, we should update its size as well.
if (mVisualCloneTarget) {
Maybe<nsIntSize> newSize = Some(aSize);
mVisualCloneTarget->Invalidate(ImageSizeChanged::Yes, newSize,
ForceInvalidate::Yes);
}
}
Maybe<CSSIntSize> HTMLVideoElement::GetVideoSize() const {
if (!mMediaInfo.HasVideo()) {
return Nothing();
}
if (mDisableVideo) {
return Nothing();
}
CSSIntSize size;
switch (mMediaInfo.mVideo.mRotation) {
case VideoRotation::kDegree_90:
case VideoRotation::kDegree_270: {
size.width = mMediaInfo.mVideo.mDisplay.height;
size.height = mMediaInfo.mVideo.mDisplay.width;
break;
}
case VideoRotation::kDegree_0:
case VideoRotation::kDegree_180:
default: {
size.height = mMediaInfo.mVideo.mDisplay.height;
size.width = mMediaInfo.mVideo.mDisplay.width;
break;
}
}
return Some(size);
}
void HTMLVideoElement::Invalidate(ImageSizeChanged aImageSizeChanged,
const Maybe<nsIntSize>& aNewIntrinsicSize,
ForceInvalidate aForceInvalidate) {
HTMLMediaElement::Invalidate(aImageSizeChanged, aNewIntrinsicSize,
aForceInvalidate);
if (mVisualCloneTarget) {
VideoFrameContainer* container =
mVisualCloneTarget->GetVideoFrameContainer();
if (container) {
container->Invalidate();
}
}
}
bool HTMLVideoElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) {
if (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height) {
return aResult.ParseHTMLDimension(aValue);
}
return HTMLMediaElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
aMaybeScriptedPrincipal, aResult);
}
void HTMLVideoElement::MapAttributesIntoRule(
MappedDeclarationsBuilder& aBuilder) {
MapImageSizeAttributesInto(aBuilder, MapAspectRatio::Yes);
MapCommonAttributesInto(aBuilder);
}
NS_IMETHODIMP_(bool)
HTMLVideoElement::IsAttributeMapped(const nsAtom* aAttribute) const {
static const MappedAttributeEntry attributes[] = {
{nsGkAtoms::width}, {nsGkAtoms::height}, {nullptr}};
static const MappedAttributeEntry* const map[] = {attributes,
sCommonAttributeMap};
return FindAttributeDependence(aAttribute, map);
}
nsMapRuleToAttributesFunc HTMLVideoElement::GetAttributeMappingFunction()
const {
return &MapAttributesIntoRule;
}
void HTMLVideoElement::UnbindFromTree(UnbindContext& aContext) {
if (mVisualCloneSource) {
mVisualCloneSource->EndCloningVisually();
} else if (mVisualCloneTarget) {
AsyncEventDispatcher::RunDOMEventWhenSafe(
*this, u"MozStopPictureInPicture"_ns, CanBubble::eNo,
ChromeOnlyDispatch::eYes);
EndCloningVisually();
}
HTMLMediaElement::UnbindFromTree(aContext);
}
nsresult HTMLVideoElement::SetAcceptHeader(nsIHttpChannel* aChannel) {
nsAutoCString value(
"video/webm,"
"video/ogg,"
"video/*;q=0.9,"
"application/ogg;q=0.7,"
"audio/*;q=0.6,*/*;q=0.5");
return aChannel->SetRequestHeader("Accept"_ns, value, false);
}
bool HTMLVideoElement::IsInteractiveHTMLContent() const {
return HasAttr(nsGkAtoms::controls) ||
HTMLMediaElement::IsInteractiveHTMLContent();
}
gfx::IntSize HTMLVideoElement::GetVideoIntrinsicDimensions() {
const auto& sz = mMediaInfo.mVideo.mDisplay;
// Prefer the size of the container as it's more up to date.
return ToMaybeRef(mVideoFrameContainer.get())
.map([&](auto& aVFC) { return aVFC.CurrentIntrinsicSize().valueOr(sz); })
.valueOr(sz);
}
uint32_t HTMLVideoElement::VideoWidth() {
if (!HasVideo()) {
return 0;
}
gfx::IntSize size = GetVideoIntrinsicDimensions();
if (mMediaInfo.mVideo.mRotation == VideoRotation::kDegree_90 ||
mMediaInfo.mVideo.mRotation == VideoRotation::kDegree_270) {
return size.height;
}
return size.width;
}
uint32_t HTMLVideoElement::VideoHeight() {
if (!HasVideo()) {
return 0;
}
gfx::IntSize size = GetVideoIntrinsicDimensions();
if (mMediaInfo.mVideo.mRotation == VideoRotation::kDegree_90 ||
mMediaInfo.mVideo.mRotation == VideoRotation::kDegree_270) {
return size.width;
}
return size.height;
}
uint32_t HTMLVideoElement::MozParsedFrames() const {
MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
if (!IsVideoStatsEnabled()) {
return 0;
}
if (OwnerDoc()->ShouldResistFingerprinting(
RFPTarget::VideoElementMozFrames)) {
return nsRFPService::GetSpoofedTotalFrames(TotalPlayTime());
}
return mDecoder ? mDecoder->GetFrameStatistics().GetParsedFrames() : 0;
}
uint32_t HTMLVideoElement::MozDecodedFrames() const {
MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
if (!IsVideoStatsEnabled()) {
return 0;
}
if (OwnerDoc()->ShouldResistFingerprinting(
RFPTarget::VideoElementMozFrames)) {
return nsRFPService::GetSpoofedTotalFrames(TotalPlayTime());
}
return mDecoder ? mDecoder->GetFrameStatistics().GetDecodedFrames() : 0;
}
uint32_t HTMLVideoElement::MozPresentedFrames() {
MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
if (!IsVideoStatsEnabled()) {
return 0;
}
if (OwnerDoc()->ShouldResistFingerprinting(
RFPTarget::VideoElementMozFrames)) {
return nsRFPService::GetSpoofedPresentedFrames(TotalPlayTime(),
VideoWidth(), VideoHeight());
}
return mDecoder ? mDecoder->GetFrameStatistics().GetPresentedFrames() : 0;
}
uint32_t HTMLVideoElement::MozPaintedFrames() {
MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
if (!IsVideoStatsEnabled()) {
return 0;
}
if (OwnerDoc()->ShouldResistFingerprinting(
RFPTarget::VideoElementMozFrames)) {
return nsRFPService::GetSpoofedPresentedFrames(TotalPlayTime(),
VideoWidth(), VideoHeight());
}
layers::ImageContainer* container = GetImageContainer();
return container ? container->GetPaintCount() : 0;
}
double HTMLVideoElement::MozFrameDelay() {
MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
if (!IsVideoStatsEnabled() || OwnerDoc()->ShouldResistFingerprinting(
RFPTarget::VideoElementMozFrameDelay)) {
return 0.0;
}
VideoFrameContainer* container = GetVideoFrameContainer();
// Hide negative delays. Frame timing tweaks in the compositor (e.g.
// adding a bias value to prevent multiple dropped/duped frames when
// frame times are aligned with composition times) may produce apparent
// negative delay, but we shouldn't report that.
return container ? std::max(0.0, container->GetFrameDelay()) : 0.0;
}
bool HTMLVideoElement::MozHasAudio() const {
MOZ_ASSERT(NS_IsMainThread(), "Should be on main thread.");
return HasAudio();
}
JSObject* HTMLVideoElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return HTMLVideoElement_Binding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<VideoPlaybackQuality>
HTMLVideoElement::GetVideoPlaybackQuality() {
DOMHighResTimeStamp creationTime = 0;
uint32_t totalFrames = 0;
uint32_t droppedFrames = 0;
if (IsVideoStatsEnabled()) {
if (nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow()) {
Performance* perf = window->GetPerformance();
if (perf) {
creationTime = perf->Now();
}
}
if (mDecoder) {
if (OwnerDoc()->ShouldResistFingerprinting(
RFPTarget::VideoElementPlaybackQuality)) {
totalFrames = nsRFPService::GetSpoofedTotalFrames(TotalPlayTime());
droppedFrames = nsRFPService::GetSpoofedDroppedFrames(
TotalPlayTime(), VideoWidth(), VideoHeight());
} else {
FrameStatistics* stats = &mDecoder->GetFrameStatistics();
if (sizeof(totalFrames) >= sizeof(stats->GetParsedFrames())) {
totalFrames = stats->GetTotalFrames();
droppedFrames = stats->GetDroppedFrames();
} else {
uint64_t total = stats->GetTotalFrames();
const auto maxNumber = std::numeric_limits<uint32_t>::max();
if (total <= maxNumber) {
totalFrames = uint32_t(total);
droppedFrames = uint32_t(stats->GetDroppedFrames());
} else {
// Too big number(s) -> Resize everything to fit in 32 bits.
double ratio = double(maxNumber) / double(total);
totalFrames = maxNumber; // === total * ratio
droppedFrames = uint32_t(double(stats->GetDroppedFrames()) * ratio);
}
}
}
if (!StaticPrefs::media_video_dropped_frame_stats_enabled()) {
droppedFrames = 0;
}
}
}
RefPtr<VideoPlaybackQuality> playbackQuality =
new VideoPlaybackQuality(this, creationTime, totalFrames, droppedFrames);
return playbackQuality.forget();
}
void HTMLVideoElement::WakeLockRelease() {
HTMLMediaElement::WakeLockRelease();
ReleaseVideoWakeLockIfExists();
}
void HTMLVideoElement::UpdateWakeLock() {
HTMLMediaElement::UpdateWakeLock();
if (!mPaused) {
CreateVideoWakeLockIfNeeded();
} else {
ReleaseVideoWakeLockIfExists();
}
}
bool HTMLVideoElement::ShouldCreateVideoWakeLock() const {
if (!StaticPrefs::media_video_wakelock()) {
return false;
}
// Only request wake lock for video with audio or video from media
// stream, because non-stream video without audio is often used as a
// background image.
//
// Some web conferencing sites route audio outside the video element,
// and would not be detected unless we check for media stream, so do
// that below.
//
// Media streams generally aren't used as background images, though if
// they were we'd get false positives. If this is an issue, we could
// check for media stream AND document has audio playing (but that was
// tricky to do).
return HasVideo() && (mSrcStream || HasAudio());
}
void HTMLVideoElement::CreateVideoWakeLockIfNeeded() {
if (AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
return;
}
if (!mScreenWakeLock && ShouldCreateVideoWakeLock()) {
RefPtr<power::PowerManagerService> pmService =
power::PowerManagerService::GetInstance();
NS_ENSURE_TRUE_VOID(pmService);
ErrorResult rv;
mScreenWakeLock = pmService->NewWakeLock(u"video-playing"_ns,
OwnerDoc()->GetInnerWindow(), rv);
}
}
void HTMLVideoElement::ReleaseVideoWakeLockIfExists() {
if (mScreenWakeLock) {
ErrorResult rv;
mScreenWakeLock->Unlock(rv);
rv.SuppressException();
mScreenWakeLock = nullptr;
return;
}
}
bool HTMLVideoElement::SetVisualCloneTarget(
RefPtr<HTMLVideoElement> aVisualCloneTarget,
RefPtr<Promise> aVisualCloneTargetPromise) {
MOZ_DIAGNOSTIC_ASSERT(
!aVisualCloneTarget || aVisualCloneTarget->IsInComposedDoc(),
"Can't set the clone target to a disconnected video "
"element.");
MOZ_DIAGNOSTIC_ASSERT(!mVisualCloneSource,
"Can't clone a video element that is already a clone.");
if (!aVisualCloneTarget ||
(aVisualCloneTarget->IsInComposedDoc() && !mVisualCloneSource)) {
mVisualCloneTarget = std::move(aVisualCloneTarget);
mVisualCloneTargetPromise = std::move(aVisualCloneTargetPromise);
return true;
}
return false;
}
bool HTMLVideoElement::SetVisualCloneSource(
RefPtr<HTMLVideoElement> aVisualCloneSource) {
MOZ_DIAGNOSTIC_ASSERT(
!aVisualCloneSource || aVisualCloneSource->IsInComposedDoc(),
"Can't set the clone source to a disconnected video "
"element.");
MOZ_DIAGNOSTIC_ASSERT(!mVisualCloneTarget,
"Can't clone a video element that is already a "
"clone.");
if (!aVisualCloneSource ||
(aVisualCloneSource->IsInComposedDoc() && !mVisualCloneTarget)) {
mVisualCloneSource = std::move(aVisualCloneSource);
return true;
}
return false;
}
/* static */
bool HTMLVideoElement::IsVideoStatsEnabled() {
return StaticPrefs::media_video_stats_enabled();
}
double HTMLVideoElement::TotalPlayTime() const {
double total = 0.0;
if (mPlayed) {
uint32_t timeRangeCount = mPlayed->Length();
for (uint32_t i = 0; i < timeRangeCount; i++) {
double begin = mPlayed->Start(i);
double end = mPlayed->End(i);
total += end - begin;
}
if (mCurrentPlayRangeStart != -1.0) {
double now = CurrentTime();
if (mCurrentPlayRangeStart != now) {
total += now - mCurrentPlayRangeStart;
}
}
}
return total;
}
already_AddRefed<Promise> HTMLVideoElement::CloneElementVisually(
HTMLVideoElement& aTargetVideo, ErrorResult& aRv) {
MOZ_ASSERT(IsInComposedDoc(),
"Can't clone a video that's not bound to a DOM tree.");
MOZ_ASSERT(aTargetVideo.IsInComposedDoc(),
"Can't clone to a video that's not bound to a DOM tree.");
if (!IsInComposedDoc() || !aTargetVideo.IsInComposedDoc()) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow();
if (!win) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(win->AsGlobal(), aRv);
if (aRv.Failed()) {
return nullptr;
}
// Do we already have a visual clone target? If so, shut it down.
if (mVisualCloneTarget) {
EndCloningVisually();
}
// If there's a poster set on the target video, clear it, otherwise
// it'll display over top of the cloned frames.
aTargetVideo.UnsetHTMLAttr(nsGkAtoms::poster, aRv);
if (aRv.Failed()) {
return nullptr;
}
if (!SetVisualCloneTarget(&aTargetVideo, promise)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
if (!aTargetVideo.SetVisualCloneSource(this)) {
mVisualCloneTarget = nullptr;
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
aTargetVideo.SetMediaInfo(mMediaInfo);
if (IsInComposedDoc() && !StaticPrefs::media_cloneElementVisually_testing()) {
NotifyUAWidgetSetupOrChange();
}
MaybeBeginCloningVisually();
return promise.forget();
}
void HTMLVideoElement::StopCloningElementVisually() {
if (mVisualCloneTarget) {
EndCloningVisually();
}
}
void HTMLVideoElement::MaybeBeginCloningVisually() {
if (!mVisualCloneTarget) {
return;
}
if (mDecoder) {
mDecoder->SetSecondaryVideoContainer(
mVisualCloneTarget->GetVideoFrameContainer());
NotifyDecoderActivityChanges();
UpdateMediaControlAfterPictureInPictureModeChanged();
} else if (mSrcStream) {
VideoFrameContainer* container =
mVisualCloneTarget->GetVideoFrameContainer();
if (container) {
mSecondaryVideoOutput = MakeRefPtr<FirstFrameVideoOutput>(
container, AbstractThread::MainThread());
mVideoWatchManager.Watch(
mSecondaryVideoOutput->mFirstFrameRendered,
&HTMLVideoElement::OnSecondaryVideoOutputFirstFrameRendered);
SetSecondaryMediaStreamRenderer(container, mSecondaryVideoOutput);
}
UpdateMediaControlAfterPictureInPictureModeChanged();
}
}
void HTMLVideoElement::EndCloningVisually() {
MOZ_ASSERT(mVisualCloneTarget);
if (mDecoder) {
mDecoder->SetSecondaryVideoContainer(nullptr);
NotifyDecoderActivityChanges();
} else if (mSrcStream) {
if (mSecondaryVideoOutput) {
mVideoWatchManager.Unwatch(
mSecondaryVideoOutput->mFirstFrameRendered,
&HTMLVideoElement::OnSecondaryVideoOutputFirstFrameRendered);
mSecondaryVideoOutput = nullptr;
}
SetSecondaryMediaStreamRenderer(nullptr);
}
Unused << mVisualCloneTarget->SetVisualCloneSource(nullptr);
Unused << SetVisualCloneTarget(nullptr);
UpdateMediaControlAfterPictureInPictureModeChanged();
if (IsInComposedDoc() && !StaticPrefs::media_cloneElementVisually_testing()) {
NotifyUAWidgetSetupOrChange();
}
}
void HTMLVideoElement::OnSecondaryVideoContainerInstalled(
const RefPtr<VideoFrameContainer>& aSecondaryContainer) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT_IF(mVisualCloneTargetPromise, mVisualCloneTarget);
if (!mVisualCloneTargetPromise) {
// Clone target was unset.
return;
}
VideoFrameContainer* container = mVisualCloneTarget->GetVideoFrameContainer();
if (NS_WARN_IF(container != aSecondaryContainer)) {
// Not the right container.
return;
}
NS_DispatchToCurrentThread(NewRunnableMethod(
"Promise::MaybeResolveWithUndefined", mVisualCloneTargetPromise,
&Promise::MaybeResolveWithUndefined));
mVisualCloneTargetPromise = nullptr;
}
void HTMLVideoElement::OnSecondaryVideoOutputFirstFrameRendered() {
OnSecondaryVideoContainerInstalled(
mVisualCloneTarget->GetVideoFrameContainer());
}
void HTMLVideoElement::OnVisibilityChange(Visibility aNewVisibility) {
HTMLMediaElement::OnVisibilityChange(aNewVisibility);
// See the alternative part after step 4, but we only pause/resume invisible
// autoplay for non-audible video, which is different from the spec. This
// behavior seems aiming to reduce the power consumption without interering
// users, and Chrome and Safari also chose to do that only for non-audible
// video, so we want to match them in order to reduce webcompat issue.
// https://html.spec.whatwg.org/multipage/media.html#ready-states:eligible-for-autoplay-2
if (!HasAttr(nsGkAtoms::autoplay) || IsAudible()) {
return;
}
if (aNewVisibility == Visibility::ApproximatelyVisible && mPaused &&
IsEligibleForAutoplay() && AllowedToPlay()) {
LOG("resume invisible paused autoplay video");
RunAutoplay();
}
// We need to consider the Pip window as well, which won't reflect in the
// visibility event.
if ((aNewVisibility == Visibility::ApproximatelyNonVisible &&
!IsCloningElementVisually()) &&
mCanAutoplayFlag) {
LOG("pause non-audible autoplay video when it's invisible");
PauseInternal();
mCanAutoplayFlag = true;
return;
}
}
} // namespace mozilla::dom
#undef LOG
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