1 files changed, 682 insertions, 0 deletions
diff --git a/dom/html/HTMLVideoElement.cpp b/dom/html/HTMLVideoElement.cpp
new file mode 100644
index 0000000000..0636fdc3b2
--- /dev/null
+++ b/dom/html/HTMLVideoElement.cpp
@@ -0,0 +1,682 @@
+/* -*- 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/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)),
+      mIsOrientationLocked(false),
+      mVideoWatchManager(this, mAbstractMainThread) {
+  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 VideoInfo::Rotation::kDegree_90:
+    case VideoInfo::Rotation::kDegree_270: {
+      size.width = mMediaInfo.mVideo.mDisplay.height;
+      size.height = mMediaInfo.mVideo.mDisplay.width;
+      break;
+    }
+    case VideoInfo::Rotation::kDegree_0:
+    case VideoInfo::Rotation::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(
+    const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) {
+  nsGenericHTMLElement::MapImageSizeAttributesInto(aAttributes, aDecls,
+                                                   MapAspectRatio::Yes);
+  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aDecls);
+}
+
+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(bool aNullParent) {
+  if (mVisualCloneSource) {
+    mVisualCloneSource->EndCloningVisually();
+  } else if (mVisualCloneTarget) {
+    AsyncEventDispatcher::RunDOMEventWhenSafe(
+        *this, u"MozStopPictureInPicture"_ns, CanBubble::eNo,
+        ChromeOnlyDispatch::eYes);
+    EndCloningVisually();
+  }
+
+  HTMLMediaElement::UnbindFromTree(aNullParent);
+}
+
+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(kNameSpaceID_None, 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 == VideoInfo::Rotation::kDegree_90 ||
+      mMediaInfo.mVideo.mRotation == VideoInfo::Rotation::kDegree_270) {
+    return size.height;
+  }
+  return size.width;
+}
+
+uint32_t HTMLVideoElement::VideoHeight() {
+  if (!HasVideo()) {
+    return 0;
+  }
+  gfx::IntSize size = GetVideoIntrinsicDimensions();
+  if (mMediaInfo.mVideo.mRotation == VideoInfo::Rotation::kDegree_90 ||
+      mMediaInfo.mVideo.mRotation == VideoInfo::Rotation::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::Unknown)) {
+    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::Unknown)) {
+    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::Unknown)) {
+    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::Unknown)) {
+    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::Unknown)) {
+    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::Unknown)) {
+        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();
+    OwnerDoc()->EnableChildElementInPictureInPictureMode();
+  } else if (mSrcStream) {
+    VideoFrameContainer* container =
+        mVisualCloneTarget->GetVideoFrameContainer();
+    if (container) {
+      mSecondaryVideoOutput =
+          MakeRefPtr<FirstFrameVideoOutput>(container, mAbstractMainThread);
+      mVideoWatchManager.Watch(
+          mSecondaryVideoOutput->mFirstFrameRendered,
+          &HTMLVideoElement::OnSecondaryVideoOutputFirstFrameRendered);
+      SetSecondaryMediaStreamRenderer(container, mSecondaryVideoOutput);
+    }
+    UpdateMediaControlAfterPictureInPictureModeChanged();
+    OwnerDoc()->EnableChildElementInPictureInPictureMode();
+  }
+}
+
+void HTMLVideoElement::EndCloningVisually() {
+  MOZ_ASSERT(mVisualCloneTarget);
+
+  if (mDecoder) {
+    mDecoder->SetSecondaryVideoContainer(nullptr);
+    NotifyDecoderActivityChanges();
+    OwnerDoc()->DisableChildElementInPictureInPictureMode();
+  } else if (mSrcStream) {
+    if (mSecondaryVideoOutput) {
+      mVideoWatchManager.Unwatch(
+          mSecondaryVideoOutput->mFirstFrameRendered,
+          &HTMLVideoElement::OnSecondaryVideoOutputFirstFrameRendered);
+      mSecondaryVideoOutput = nullptr;
+    }
+    SetSecondaryMediaStreamRenderer(nullptr);
+    OwnerDoc()->DisableChildElementInPictureInPictureMode();
+  }
+
+  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;
+  }
+
+  mMainThreadEventTarget->Dispatch(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