Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
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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/. */
#ifndef mozilla_dom_HTMLMediaElement_h
#define mozilla_dom_HTMLMediaElement_h
#include "nsAutoPtr.h"
#include "nsIDOMHTMLMediaElement.h"
#include "nsGenericHTMLElement.h"
#include "MediaDecoderOwner.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIObserver.h"
#include "mozilla/CORSMode.h"
#include "DecoderTraits.h"
#include "nsIAudioChannelAgent.h"
#include "mozilla/Attributes.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/TextTrackManager.h"
#include "mozilla/WeakPtr.h"
#include "MediaDecoder.h"
#ifdef MOZ_EME
#include "mozilla/dom/MediaKeys.h"
#include "mozilla/StateWatching.h"
#include "nsGkAtoms.h"
#include "PrincipalChangeObserver.h"
// X.h on Linux #defines CurrentTime as 0L, so we have to #undef it here.
#ifdef CurrentTime
#undef CurrentTime
#include "mozilla/dom/HTMLMediaElementBinding.h"
// Define to output information on decoding and painting framerate
/* #define DEBUG_FRAME_RATE 1 */
typedef uint16_t nsMediaNetworkState;
typedef uint16_t nsMediaReadyState;
typedef uint32_t SuspendTypes;
typedef uint32_t AudibleChangedReasons;
typedef uint8_t AudibleState;
namespace mozilla {
class DecoderDoctorDiagnostics;
class DOMMediaStream;
class ErrorResult;
class MediaResource;
class MediaDecoder;
class VideoFrameContainer;
namespace dom {
class AudioChannelAgent;
class MediaKeys;
class TextTrack;
class TimeRanges;
class WakeLock;
class MediaTrack;
class MediaStreamTrack;
class VideoStreamTrack;
} // namespace dom
} // namespace mozilla
class AutoNotifyAudioChannelAgent;
class nsIChannel;
class nsIHttpChannel;
class nsILoadGroup;
class nsIRunnable;
class nsITimer;
class nsRange;
namespace mozilla {
namespace dom {
// Number of milliseconds between timeupdate events as defined by spec
#define TIMEUPDATE_MS 250
class MediaError;
class MediaSource;
class TextTrackList;
class AudioTrackList;
class VideoTrackList;
class HTMLMediaElement : public nsGenericHTMLElement,
public nsIDOMHTMLMediaElement,
public MediaDecoderOwner,
public nsIAudioChannelAgentCallback,
public PrincipalChangeObserver<DOMMediaStream>,
public SupportsWeakPtr<HTMLMediaElement>
friend AutoNotifyAudioChannelAgent;
typedef mozilla::TimeStamp TimeStamp;
typedef mozilla::layers::ImageContainer ImageContainer;
typedef mozilla::VideoFrameContainer VideoFrameContainer;
typedef mozilla::MediaStream MediaStream;
typedef mozilla::MediaResource MediaResource;
typedef mozilla::MediaDecoderOwner MediaDecoderOwner;
typedef mozilla::MetadataTags MetadataTags;
CORSMode GetCORSMode() {
return mCORSMode;
explicit HTMLMediaElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
* This is used when the browser is constructing a video element to play
* a channel that we've already started loading. The src attribute and
* <source> children are ignored.
* @param aChannel the channel to use
* @param aListener returns a stream listener that should receive
* notifications for the stream
nsresult LoadWithChannel(nsIChannel *aChannel, nsIStreamListener **aListener);
// nsIDOMHTMLMediaElement
// nsISupports
virtual bool ParseAttribute(int32_t aNamespaceID,
nsIAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult) override;
// SetAttr override. C++ is stupid, so have to override both
// overloaded methods.
nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAString& aValue, bool aNotify)
return SetAttr(aNameSpaceID, aName, nullptr, aValue, aNotify);
virtual nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
nsIAtom* aPrefix, const nsAString& aValue,
bool aNotify) override;
virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttr,
bool aNotify) override;
virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAttrValue* aValue,
bool aNotify) override;
virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers) override;
virtual void UnbindFromTree(bool aDeep = true,
bool aNullParent = true) override;
virtual void DoneCreatingElement() override;
virtual bool IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable,
int32_t *aTabIndex) override;
virtual int32_t TabIndexDefault() override;
* Call this to reevaluate whether we should start/stop due to our owner
* document being active, inactive, visible or hidden.
virtual void NotifyOwnerDocumentActivityChanged();
// Called by the video decoder object, on the main thread,
// when it has read the metadata containing video dimensions,
// etc.
virtual void MetadataLoaded(const MediaInfo* aInfo,
nsAutoPtr<const MetadataTags> aTags) final override;
// Called by the decoder object, on the main thread,
// when it has read the first frame of the video or audio.
virtual void FirstFrameLoaded() final override;
// Called by the video decoder object, on the main thread,
// when the resource has a network error during loading.
virtual void NetworkError() final override;
// Called by the video decoder object, on the main thread, when the
// resource has a decode error during metadata loading or decoding.
virtual void DecodeError(const MediaResult& aError) final override;
// Return true if error attribute is not null.
virtual bool HasError() const final override;
// Called by the video decoder object, on the main thread, when the
// resource load has been cancelled.
virtual void LoadAborted() final override;
// Called by the video decoder object, on the main thread,
// when the video playback has ended.
virtual void PlaybackEnded() final override;
// Called by the video decoder object, on the main thread,
// when the resource has started seeking.
virtual void SeekStarted() final override;
// Called by the video decoder object, on the main thread,
// when the resource has completed seeking.
virtual void SeekCompleted() final override;
// Called by the media stream, on the main thread, when the download
// has been suspended by the cache or because the element itself
// asked the decoder to suspend the download.
virtual void DownloadSuspended() final override;
// Called by the media stream, on the main thread, when the download
// has been resumed by the cache or because the element itself
// asked the decoder to resumed the download.
// If aForceNetworkLoading is True, ignore the fact that the download has
// previously finished. We are downloading the middle of the media after
// having downloaded the end, we need to notify the element a download in
// ongoing.
virtual void DownloadResumed(bool aForceNetworkLoading = false) final override;
// Called to indicate the download is progressing.
virtual void DownloadProgressed() final override;
// Called by the media decoder to indicate whether the media cache has
// suspended the channel.
virtual void NotifySuspendedByCache(bool aIsSuspended) final override;
virtual bool IsActive() const final override;
virtual bool IsHidden() const final override;
// Called by the media decoder and the video frame to get the
// ImageContainer containing the video data.
virtual VideoFrameContainer* GetVideoFrameContainer() final override;
layers::ImageContainer* GetImageContainer();
// From PrincipalChangeObserver<DOMMediaStream>.
void PrincipalChanged(DOMMediaStream* aStream) override;
void UpdateSrcStreamVideoPrincipal(const PrincipalHandle& aPrincipalHandle);
// Called after the MediaStream we're playing rendered a frame to aContainer
// with a different principalHandle than the previous frame.
void PrincipalHandleChangedForVideoFrameContainer(VideoFrameContainer* aContainer,
const PrincipalHandle& aNewPrincipalHandle);
// Dispatch events
virtual nsresult DispatchAsyncEvent(const nsAString& aName) final override;
// Triggers a recomputation of readyState.
void UpdateReadyState() override { UpdateReadyStateInternal(); }
// Dispatch events that were raised while in the bfcache
nsresult DispatchPendingMediaEvents();
// Return true if we can activate autoplay assuming enough data has arrived.
bool CanActivateAutoplay();
// Notify that state has changed that might cause an autoplay element to
// start playing.
// If the element is 'autoplay' and is ready to play back (not paused,
// autoplay pref enabled, etc), it should start playing back.
void CheckAutoplayDataReady();
// Check if the media element had crossorigin set when loading started
bool ShouldCheckAllowOrigin();
// Returns true if the currently loaded resource is CORS same-origin with
// respect to the document.
bool IsCORSSameOrigin();
// Is the media element potentially playing as defined by the HTML 5 specification.
// http://www.whatwg.org/specs/web-apps/current-work/#potentially-playing
bool IsPotentiallyPlaying() const;
// Has playback ended as defined by the HTML 5 specification.
// http://www.whatwg.org/specs/web-apps/current-work/#ended
bool IsPlaybackEnded() const;
// principal of the currently playing resource. Anything accessing the contents
// of this element must have a principal that subsumes this principal.
// Returns null if nothing is playing.
already_AddRefed<nsIPrincipal> GetCurrentPrincipal();
// Principal of the currently playing video resource. Anything accessing the
// image container of this element must have a principal that subsumes this
// principal. If there are no live video tracks but content has been rendered
// to the image container, we return the last video principal we had. Should
// the image container be empty with no live video tracks, we return nullptr.
already_AddRefed<nsIPrincipal> GetCurrentVideoPrincipal();
// called to notify that the principal of the decoder's media resource has changed.
void NotifyDecoderPrincipalChanged() final override;
// An interface for observing principal changes on the media elements
// MediaDecoder. This will also be notified if the active CORSMode changes.
class DecoderPrincipalChangeObserver
virtual void NotifyDecoderPrincipalChanged() = 0;
* Add a DecoderPrincipalChangeObserver to this media element.
* Ownership of the DecoderPrincipalChangeObserver remains with the caller,
* and it's the caller's responsibility to remove the observer before it dies.
void AddDecoderPrincipalChangeObserver(DecoderPrincipalChangeObserver* aObserver);
* Remove an added DecoderPrincipalChangeObserver from this media element.
* Returns true if it was successfully removed.
bool RemoveDecoderPrincipalChangeObserver(DecoderPrincipalChangeObserver* aObserver);
class StreamCaptureTrackSource;
class DecoderCaptureTrackSource;
class CaptureStreamTrackSourceGetter;
// Update the visual size of the media. Called from the decoder on the
// main thread when/if the size changes.
void UpdateMediaSize(const nsIntSize& aSize);
// Like UpdateMediaSize, but only updates the size if no size has yet
// been set.
void UpdateInitialMediaSize(const nsIntSize& aSize);
// Returns the CanPlayStatus indicating if we can handle the
// full MIME type including the optional codecs parameter.
static CanPlayStatus GetCanPlay(const nsAString& aType,
DecoderDoctorDiagnostics* aDiagnostics);
* Called when a child source element is added to this media element. This
* may queue a task to run the select resource algorithm if appropriate.
void NotifyAddedSource();
* Called when there's been an error fetching the resource. This decides
* whether it's appropriate to fire an error event.
void NotifyLoadError();
* Called by one of our associated MediaTrackLists (audio/video) when an
* AudioTrack is enabled or a VideoTrack is selected.
void NotifyMediaTrackEnabled(MediaTrack* aTrack);
* Called by one of our associated MediaTrackLists (audio/video) when an
* AudioTrack is disabled or a VideoTrack is unselected.
void NotifyMediaTrackDisabled(MediaTrack* aTrack);
* Called when tracks become available to the source media stream.
void NotifyMediaStreamTracksAvailable(DOMMediaStream* aStream);
* Called when a captured MediaStreamTrack is stopped so we can clean up its
* MediaInputPort.
void NotifyOutputTrackStopped(DOMMediaStream* aOwningStream,
TrackID aDestinationTrackID);
virtual bool IsNodeOfType(uint32_t aFlags) const override;
* Returns the current load ID. Asynchronous events store the ID that was
* current when they were enqueued, and if it has changed when they come to
* fire, they consider themselves cancelled, and don't fire.
uint32_t GetCurrentLoadID() { return mCurrentLoadID; }
* Returns the load group for this media element's owner document.
* XXX XBL2 issue.
already_AddRefed<nsILoadGroup> GetDocumentLoadGroup();
* Returns true if the media has played or completed a seek.
* Used by video frame to determine whether to paint the poster.
bool GetPlayedOrSeeked() const { return mHasPlayedOrSeeked; }
nsresult CopyInnerTo(Element* aDest);
* Sets the Accept header on the HTTP channel to the required
* video or audio MIME types.
virtual nsresult SetAcceptHeader(nsIHttpChannel* aChannel) = 0;
* Sets the required request headers on the HTTP channel for
* video or audio requests.
void SetRequestHeaders(nsIHttpChannel* aChannel);
* Asynchronously awaits a stable state, whereupon aRunnable runs on the main
* thread. This adds an event which run aRunnable to the appshell's list of
* sections synchronous the next time control returns to the event loop.
void RunInStableState(nsIRunnable* aRunnable);
* Fires a timeupdate event. If aPeriodic is true, the event will only
* be fired if we've not fired a timeupdate event (for any reason) in the
* last 250ms, as required by the spec when the current time is periodically
* increasing during playback.
virtual void FireTimeUpdate(bool aPeriodic) final override;
* This will return null if mSrcStream is null, or if mSrcStream is not
* null but its GetPlaybackStream() returns null --- which can happen during
* cycle collection unlinking!
MediaStream* GetSrcMediaStream() const;
// WebIDL
MediaError* GetError() const;
// XPCOM GetSrc() is OK
void SetSrc(const nsAString& aSrc, ErrorResult& aRv)
SetHTMLAttr(nsGkAtoms::src, aSrc, aRv);
// XPCOM GetCurrentSrc() is OK
void GetCrossOrigin(nsAString& aResult)
// Null for both missing and invalid defaults is ok, since we
// always parse to an enum value, so we don't need an invalid
// default, and we _want_ the missing default to be null.
GetEnumAttr(nsGkAtoms::crossorigin, nullptr, aResult);
void SetCrossOrigin(const nsAString& aCrossOrigin, ErrorResult& aError)
SetOrRemoveNullableStringAttr(nsGkAtoms::crossorigin, aCrossOrigin, aError);
uint16_t NetworkState() const
return mNetworkState;
void NotifyXPCOMShutdown() final override;
// Called by media decoder when the audible state changed or when input is
// a media stream.
virtual void SetAudibleState(bool aAudible) final override;
// Notify agent when the MediaElement changes its audible state.
void NotifyAudioPlaybackChanged(AudibleChangedReasons aReason);
// XPCOM GetPreload() is OK
void SetPreload(const nsAString& aValue, ErrorResult& aRv)
SetHTMLAttr(nsGkAtoms::preload, aValue, aRv);
already_AddRefed<TimeRanges> Buffered() const;
// XPCOM Load() is OK
// XPCOM CanPlayType() is OK
uint16_t ReadyState() const
return mReadyState;
bool Seeking() const;
double CurrentTime() const;
void SetCurrentTime(double aCurrentTime, ErrorResult& aRv);
void FastSeek(double aTime, ErrorResult& aRv);
already_AddRefed<Promise> SeekToNextFrame(ErrorResult& aRv);
double Duration() const;
bool HasAudio() const
return mMediaInfo.HasAudio();
bool HasVideo() const
return mMediaInfo.HasVideo();
bool IsEncrypted() const
return mIsEncrypted;
bool Paused() const
return mPaused;
double DefaultPlaybackRate() const
return mDefaultPlaybackRate;
void SetDefaultPlaybackRate(double aDefaultPlaybackRate, ErrorResult& aRv);
double PlaybackRate() const
return mPlaybackRate;
void SetPlaybackRate(double aPlaybackRate, ErrorResult& aRv);
already_AddRefed<TimeRanges> Played();
already_AddRefed<TimeRanges> Seekable() const;
bool Ended();
bool Autoplay() const
return GetBoolAttr(nsGkAtoms::autoplay);
void SetAutoplay(bool aValue, ErrorResult& aRv)
SetHTMLBoolAttr(nsGkAtoms::autoplay, aValue, aRv);
bool Loop() const
return GetBoolAttr(nsGkAtoms::loop);
void SetLoop(bool aValue, ErrorResult& aRv)
SetHTMLBoolAttr(nsGkAtoms::loop, aValue, aRv);
void Play(ErrorResult& aRv);
void Pause(ErrorResult& aRv);
bool Controls() const
return GetBoolAttr(nsGkAtoms::controls);
void SetControls(bool aValue, ErrorResult& aRv)
SetHTMLBoolAttr(nsGkAtoms::controls, aValue, aRv);
double Volume() const
return mVolume;
void SetVolume(double aVolume, ErrorResult& aRv);
bool Muted() const
return mMuted & MUTED_BY_CONTENT;
// XPCOM SetMuted() is OK
bool DefaultMuted() const
return GetBoolAttr(nsGkAtoms::muted);
void SetDefaultMuted(bool aMuted, ErrorResult& aRv)
SetHTMLBoolAttr(nsGkAtoms::muted, aMuted, aRv);
bool MozAllowCasting() const
return mAllowCasting;
void SetMozAllowCasting(bool aShow)
mAllowCasting = aShow;
bool MozIsCasting() const
return mIsCasting;
void SetMozIsCasting(bool aShow)
mIsCasting = aShow;
already_AddRefed<MediaSource> GetMozMediaSourceObject() const;
// Returns a string describing the state of the media player internal
// data. Used for debugging purposes.
void GetMozDebugReaderData(nsAString& aString);
void MozDumpDebugInfo();
void SetVisible(bool aVisible);
already_AddRefed<DOMMediaStream> GetSrcObject() const;
void SetSrcObject(DOMMediaStream& aValue);
void SetSrcObject(DOMMediaStream* aValue);
// TODO: remove prefixed versions soon (1183495).
already_AddRefed<DOMMediaStream> GetMozSrcObject() const;
void SetMozSrcObject(DOMMediaStream& aValue);
void SetMozSrcObject(DOMMediaStream* aValue);
bool MozPreservesPitch() const
return mPreservesPitch;
// XPCOM MozPreservesPitch() is OK
#ifdef MOZ_EME
MediaKeys* GetMediaKeys() const;
already_AddRefed<Promise> SetMediaKeys(MediaKeys* mediaKeys,
ErrorResult& aRv);
mozilla::dom::EventHandlerNonNull* GetOnencrypted();
void SetOnencrypted(mozilla::dom::EventHandlerNonNull* aCallback);
mozilla::dom::EventHandlerNonNull* GetOnwaitingforkey();
void SetOnwaitingforkey(mozilla::dom::EventHandlerNonNull* aCallback);
void DispatchEncrypted(const nsTArray<uint8_t>& aInitData,
const nsAString& aInitDataType) override;
bool IsEventAttributeName(nsIAtom* aName) override;
// Returns the principal of the "top level" document; the origin displayed
// in the URL bar of the browser window.
already_AddRefed<nsIPrincipal> GetTopLevelPrincipal();
bool ContainsRestrictedContent();
#endif // MOZ_EME
void CannotDecryptWaitingForKey();
bool MozAutoplayEnabled() const
return mAutoplayEnabled;
already_AddRefed<DOMMediaStream> CaptureAudio(ErrorResult& aRv,
MediaStreamGraph* aGraph);
already_AddRefed<DOMMediaStream> MozCaptureStream(ErrorResult& aRv);
already_AddRefed<DOMMediaStream> MozCaptureStreamUntilEnded(ErrorResult& aRv);
bool MozAudioCaptured() const
return mAudioCaptured;
* Ensures any MediaStreamTracks captured from a MediaDecoder are ended.
void EndPreCreatedCapturedDecoderTracks();
void MozGetMetadata(JSContext* aCx, JS::MutableHandle<JSObject*> aResult,
ErrorResult& aRv);
double MozFragmentEnd();
AudioChannel MozAudioChannelType() const
return mAudioChannel;
void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);
AudioTrackList* AudioTracks();
VideoTrackList* VideoTracks();
TextTrackList* GetTextTracks();
already_AddRefed<TextTrack> AddTextTrack(TextTrackKind aKind,
const nsAString& aLabel,
const nsAString& aLanguage);
void AddTextTrack(TextTrack* aTextTrack) {
void RemoveTextTrack(TextTrack* aTextTrack, bool aPendingListOnly = false) {
if (mTextTrackManager) {
mTextTrackManager->RemoveTextTrack(aTextTrack, aPendingListOnly);
void NotifyCueAdded(TextTrackCue& aCue) {
if (mTextTrackManager) {
void NotifyCueRemoved(TextTrackCue& aCue) {
if (mTextTrackManager) {
void NotifyCueUpdated(TextTrackCue *aCue) {
if (mTextTrackManager) {
void NotifyCueDisplayStatesChanged();
bool GetHasUserInteraction()
return mHasUserInteraction;
// A method to check whether we are currently playing.
bool IsCurrentlyPlaying() const;
// Returns true if the media element is being destroyed. Used in
// dormancy checks to prevent dormant processing for an element
// that will soon be gone.
bool IsBeingDestroyed();
// These are used for testing only
float ComputedVolume() const;
bool ComputedMuted() const;
nsSuspendedTypes ComputedSuspended() const;
void SetMediaInfo(const MediaInfo& aInfo);
// Telemetry: to record the usage of a {visible / invisible} video element as
// the source of {drawImage(), createPattern(), createImageBitmap() and
// captureStream()} APIs.
enum class CallerAPI {
void MarkAsContentSource(CallerAPI aAPI);
virtual ~HTMLMediaElement();
class ChannelLoader;
class ErrorSink;
class MediaLoadListener;
class MediaStreamTracksAvailableCallback;
class MediaStreamTrackListener;
class StreamListener;
class StreamSizeListener;
class ShutdownObserver;
MediaDecoderOwner::NextFrameStatus NextFrameStatus();
void SetDecoder(MediaDecoder* aDecoder) {
MOZ_ASSERT(aDecoder); // Use ShutdownDecoder() to clear.
if (mDecoder) {
mDecoder = aDecoder;
class WakeLockBoolWrapper {
explicit WakeLockBoolWrapper(bool val = false)
: mValue(val), mCanPlay(true), mOuter(nullptr) {}
void SetOuter(HTMLMediaElement* outer) { mOuter = outer; }
void SetCanPlay(bool aCanPlay);
MOZ_IMPLICIT operator bool() const { return mValue; }
WakeLockBoolWrapper& operator=(bool val);
bool operator !() const { return !mValue; }
static void TimerCallback(nsITimer* aTimer, void* aClosure);
void UpdateWakeLock();
bool mValue;
bool mCanPlay;
HTMLMediaElement* mOuter;
nsCOMPtr<nsITimer> mTimer;
// Holds references to the DOM wrappers for the MediaStreams that we're
// writing to.
struct OutputMediaStream {
RefPtr<DOMMediaStream> mStream;
TrackID mNextAvailableTrackID;
bool mFinishWhenEnded;
bool mCapturingAudioOnly;
bool mCapturingDecoder;
bool mCapturingMediaStream;
// The following members are keeping state for a captured MediaDecoder.
// Tracks that were created on main thread before MediaDecoder fed them
// to the MediaStreamGraph.
nsTArray<RefPtr<MediaStreamTrack>> mPreCreatedTracks;
// The following members are keeping state for a captured MediaStream.
nsTArray<Pair<nsString, RefPtr<MediaInputPort>>> mTrackPorts;
nsresult PlayInternal();
/** Use this method to change the mReadyState member, so required
* events can be fired.
void ChangeReadyState(nsMediaReadyState aState);
* Use this method to change the mNetworkState member, so required
* actions will be taken during the transition.
void ChangeNetworkState(nsMediaNetworkState aState);
* These two methods are called by the WakeLockBoolWrapper when the wakelock
* has to be created or released.
virtual void WakeLockCreate();
virtual void WakeLockRelease();
RefPtr<WakeLock> mWakeLock;
* Logs a warning message to the web console to report various failures.
* aMsg is the localized message identifier, aParams is the parameters to
* be substituted into the localized message, and aParamCount is the number
* of parameters in aParams.
void ReportLoadError(const char* aMsg,
const char16_t** aParams = nullptr,
uint32_t aParamCount = 0);
* Changes mHasPlayedOrSeeked to aValue. If mHasPlayedOrSeeked changes
* we'll force a reflow so that the video frame gets reflowed to reflect
* the poster hiding or showing immediately.
void SetPlayedOrSeeked(bool aValue);
* Initialize the media element for playback of aStream
void SetupSrcMediaStreamPlayback(DOMMediaStream* aStream);
* Stop playback on mSrcStream.
void EndSrcMediaStreamPlayback();
* Ensure we're playing mSrcStream if and only if we're not paused.
enum { REMOVING_SRC_STREAM = 0x1 };
void UpdateSrcMediaStreamPlaying(uint32_t aFlags = 0);
* Called by our DOMMediaStream::TrackListener when a new MediaStreamTrack has
* been added to the playback stream of |mSrcStream|.
void NotifyMediaStreamTrackAdded(const RefPtr<MediaStreamTrack>& aTrack);
* Called by our DOMMediaStream::TrackListener when a MediaStreamTrack in
* |mSrcStream|'s playback stream has ended.
void NotifyMediaStreamTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack);
* Enables or disables all tracks forwarded from mSrcStream to all
* OutputMediaStreams. We do this for muting the tracks when pausing,
* and unmuting when playing the media element again.
* If mSrcStream is unset, this does nothing.
void SetCapturedOutputStreamsEnabled(bool aEnabled);
* Create a new MediaStreamTrack for aTrack and add it to the DOMMediaStream
* in aOutputStream. This automatically sets the output track to enabled or
* disabled depending on our current playing state.
void AddCaptureMediaTrackToOutputStream(MediaTrack* aTrack,
OutputMediaStream& aOutputStream,
bool aAsyncAddtrack = true);
* Returns an DOMMediaStream containing the played contents of this
* element. When aFinishWhenEnded is true, when this element ends playback
* we will finish the stream and not play any more into it.
* When aFinishWhenEnded is false, ending playback does not finish the stream.
* The stream will never finish.
* When aCaptureAudio is true, we stop playout of audio and instead route it
* to the DOMMediaStream. Volume and mute state will be applied to the audio
* reaching the stream. No video tracks will be captured in this case.
already_AddRefed<DOMMediaStream> CaptureStreamInternal(bool aFinishWhenEnded,
bool aCaptureAudio,
MediaStreamGraph* aGraph);
* Initialize a decoder as a clone of an existing decoder in another
* element.
* mLoadingSrc must already be set.
nsresult InitializeDecoderAsClone(MediaDecoder* aOriginal);
* Initialize a decoder to load the given channel. The decoder's stream
* listener is returned via aListener.
* mLoadingSrc must already be set.
nsresult InitializeDecoderForChannel(nsIChannel *aChannel,
nsIStreamListener **aListener);
* Finish setting up the decoder after Load() has been called on it.
* Called by InitializeDecoderForChannel/InitializeDecoderAsClone.
nsresult FinishDecoderSetup(MediaDecoder* aDecoder,
MediaResource* aStream,
nsIStreamListener **aListener);
* Call this after setting up mLoadingSrc and mDecoder.
void AddMediaElementToURITable();
* Call this before modifying mLoadingSrc.
void RemoveMediaElementFromURITable();
* Call this to find a media element with the same NodePrincipal and mLoadingSrc
* set to aURI, and with a decoder on which Load() has been called.
HTMLMediaElement* LookupMediaElementURITable(nsIURI* aURI);
* Shutdown and clear mDecoder and maintain associated invariants.
void ShutdownDecoder();
* Execute the initial steps of the load algorithm that ensure existing
* loads are aborted, the element is emptied, and a new load ID is
* created.
void AbortExistingLoads();
* Called when all potential resources are exhausted. Changes network
* state to NETWORK_NO_SOURCE, and sends error event with code
void NoSupportedMediaSourceError(const nsACString& aErrorDetails = nsCString());
* Attempts to load resources from the <source> children. This is a
* substep of the resource selection algorithm. Do not call this directly,
* call QueueLoadFromSourceTask() instead.
void LoadFromSourceChildren();
* Asynchronously awaits a stable state, and then causes
* LoadFromSourceChildren() to be called on the main threads' event loop.
void QueueLoadFromSourceTask();
* Runs the media resource selection algorithm.
void SelectResource();
* A wrapper function that allows us to cleanly reset flags after a call
* to SelectResource()
void SelectResourceWrapper();
* Asynchronously awaits a stable state, and then causes SelectResource()
* to be run on the main thread's event loop.
void QueueSelectResourceTask();
* When loading a new source on an existing media element, make sure to reset
* everything that is accessible using the media element API.
void ResetState();
* The resource-fetch algorithm step of the load algorithm.
nsresult LoadResource();
* Selects the next <source> child from which to load a resource. Called
* during the resource selection algorithm. Stores the return value in
* mSourceLoadCandidate before returning.
nsIContent* GetNextSource();
* Changes mDelayingLoadEvent, and will call BlockOnLoad()/UnblockOnLoad()
* on the owning document, so it can delay the load event firing.
void ChangeDelayLoadStatus(bool aDelay);
* If we suspended downloading after the first frame, unsuspend now.
void StopSuspendingAfterFirstFrame();
* Called when our channel is redirected to another channel.
* Updates our mChannel reference to aNewChannel.
nsresult OnChannelRedirect(nsIChannel *aChannel,
nsIChannel *aNewChannel,
uint32_t aFlags);
* Call this to reevaluate whether we should be holding a self-reference.
void AddRemoveSelfReference();
* Called asynchronously to release a self-reference to this element.
void DoRemoveSelfReference();
* Called when "xpcom-shutdown" event is received.
void NotifyShutdownEvent();
* Possible values of the 'preload' attribute.
enum PreloadAttrValue : uint8_t {
PRELOAD_ATTR_EMPTY, // set to ""
PRELOAD_ATTR_NONE, // set to "none"
PRELOAD_ATTR_METADATA, // set to "metadata"
PRELOAD_ATTR_AUTO // set to "auto"
* The preloading action to perform. These dictate how we react to the
* preload attribute. See mPreloadAction.
enum PreloadAction {
PRELOAD_UNDEFINED = 0, // not determined - used only for initialization
PRELOAD_NONE = 1, // do not preload
PRELOAD_METADATA = 2, // preload only the metadata (and first frame)
PRELOAD_ENOUGH = 3 // preload enough data to allow uninterrupted
// playback
* The guts of Load(). Load() acts as a wrapper around this which sets
* mIsDoingExplicitLoad to true so that when script calls 'load()'
* preload-none will be automatically upgraded to preload-metadata.
void DoLoad();
* Suspends the load of mLoadingSrc, so that it can be resumed later
* by ResumeLoad(). This is called when we have a media with a 'preload'
* attribute value of 'none', during the resource selection algorithm.
void SuspendLoad();
* Resumes a previously suspended load (suspended by SuspendLoad(uri)).
* Will continue running the resource selection algorithm.
* Sets mPreloadAction to aAction.
void ResumeLoad(PreloadAction aAction);
* Handle a change to the preload attribute. Should be called whenever the
* value (or presence) of the preload attribute changes. The change in
* attribute value may cause a change in the mPreloadAction of this
* element. If there is a change then this method will initiate any
* behaviour that is necessary to implement the action.
void UpdatePreloadAction();
* Fire progress events if needed according to the time and byte constraints
* outlined in the specification. aHaveNewProgress is true if progress has
* just been detected. Otherwise the method is called as a result of the
* progress timer.
void CheckProgress(bool aHaveNewProgress);
static void ProgressTimerCallback(nsITimer* aTimer, void* aClosure);
* Start timer to update download progress.
void StartProgressTimer();
* Start sending progress and/or stalled events.
void StartProgress();
* Stop progress information timer and events.
void StopProgress();
* Dispatches an error event to a child source element.
void DispatchAsyncSourceError(nsIContent* aSourceElement);
* Resets the media element for an error condition as per aErrorCode.
* aErrorCode must be one of nsIDOMHTMLMediaError codes.
void Error(uint16_t aErrorCode, const nsACString& aErrorDetails = nsCString());
* Returns the URL spec of the currentSrc.
void GetCurrentSpec(nsCString& aString);
* Process any media fragment entries in the URI
void ProcessMediaFragmentURI();
* Mute or unmute the audio and change the value that the |muted| map.
void SetMutedInternal(uint32_t aMuted);
* Update the volume of the output audio stream to match the element's
* current mMuted/mVolume/mAudioChannelFaded state.
void SetVolumeInternal();
* Suspend (if aPauseForInactiveDocument) or resume element playback and
* resource download. If aSuspendEvents is true, event delivery is
* suspended (and events queued) until the element is resumed.
void SuspendOrResumeElement(bool aPauseElement, bool aSuspendEvents);
// Get the HTMLMediaElement object if the decoder is being used from an
// HTML media element, and null otherwise.
virtual HTMLMediaElement* GetMediaElement() final override
return this;
// Return true if decoding should be paused
virtual bool GetPaused() final override
bool isPaused = false;
return isPaused;
// Check the permissions for audiochannel.
bool CheckAudioChannelPermissions(const nsAString& aType);
// Seeks to aTime seconds. aSeekType can be Exact to seek to exactly the
// seek target, or PrevSyncPoint if a quicker but less precise seek is
// desired, and we'll seek to the sync point (keyframe and/or start of the
// next block of audio samples) preceeding seek target.
already_AddRefed<Promise> Seek(double aTime, SeekTarget::Type aSeekType, ErrorResult& aRv);
// A method to check if we are playing through the AudioChannel.
bool IsPlayingThroughTheAudioChannel() const;
// Update the audio channel playing state
void UpdateAudioChannelPlayingState(bool aForcePlaying = false);
// Adds to the element's list of pending text tracks each text track
// in the element's list of text tracks whose text track mode is not disabled
// and whose text track readiness state is loading.
void PopulatePendingTextTrackList();
// Gets a reference to the MediaElement's TextTrackManager. If the
// MediaElement doesn't yet have one then it will create it.
TextTrackManager* GetOrCreateTextTrackManager();
// Recomputes ready state and fires events as necessary based on current state.
void UpdateReadyStateInternal();
// Notifies the audio channel agent when the element starts or stops playing.
void NotifyAudioChannelAgent(bool aPlaying);
// True if we create the audio channel agent successfully or we already have
// one. The agent is used to communicate with the AudioChannelService. eg.
// notify we are playing/audible and receive muted/unmuted/suspend/resume
// commands from AudioChannelService.
bool MaybeCreateAudioChannelAgent();
// Determine if the element should be paused because of suspend conditions.
bool ShouldElementBePaused();
// Create or destroy the captured stream depend on mAudioCapturedByWindow.
void AudioCaptureStreamChangeIfNeeded();
* We have different kinds of suspended cases,
* It's used when we temporary lost platform audio focus. MediaElement can
* only be resumed when we gain the audio focus again.
* It's used when user press the pause botton on the remote media-control.
* MediaElement can be resumed by reomte media-control or via play().
* It's used to reduce the power comsuption, we won't play the auto-play
* audio/video in the page we have never visited before. MediaElement would
* be resumed when the page is active. See bug647429 for more details.
* When we permanently lost platform audio focus, we shuold stop playing
* and stop the audio channel agent. MediaElement can only be restarted by
* play().
void PauseByAudioChannel(SuspendTypes aSuspend);
void BlockByAudioChannel();
void ResumeFromAudioChannel();
void ResumeFromAudioChannelPaused(SuspendTypes aSuspend);
void ResumeFromAudioChannelBlocked();
bool IsSuspendedByAudioChannel() const;
void SetAudioChannelSuspended(SuspendTypes aSuspend);
// A method to check whether the media element is allowed to start playback.
bool IsAllowedToPlay();
bool IsAllowedToPlayByAudioChannel();
// If the network state is empty and then we would trigger DoLoad().
void MaybeDoLoad();
// True if the tab which media element belongs to has been to foreground at
// least once or activated by manually clicking the unblocking tab icon.
bool IsTabActivated() const;
AudibleState IsAudible() const;
// It's used for fennec only, send the notification when the user resumes the
// media which was paused by media control.
void MaybeNotifyMediaResumed(SuspendTypes aSuspend);
class nsAsyncEventRunner;
using nsGenericHTMLElement::DispatchEvent;
// For nsAsyncEventRunner.
nsresult DispatchEvent(const nsAString& aName);
// Open unsupported types media with the external app when the media element
// triggers play() after loaded fail. eg. preload the data before start play.
void OpenUnsupportedMediaWithExternalAppIfNeeded() const;
// The current decoder. Load() has been called on this decoder.
// At most one of mDecoder and mSrcStream can be non-null.
RefPtr<MediaDecoder> mDecoder;
// Observers listening to changes to the mDecoder principal.
// Used by streams captured from this element.
nsTArray<DecoderPrincipalChangeObserver*> mDecoderPrincipalChangeObservers;
// State-watching manager.
WatchManager<HTMLMediaElement> mWatchManager;
// A reference to the VideoFrameContainer which contains the current frame
// of video to display.
RefPtr<VideoFrameContainer> mVideoFrameContainer;
// Holds a reference to the DOM wrapper for the MediaStream that has been
// set in the src attribute.
RefPtr<DOMMediaStream> mSrcAttrStream;
// Holds a reference to the DOM wrapper for the MediaStream that we're
// actually playing.
// At most one of mDecoder and mSrcStream can be non-null.
RefPtr<DOMMediaStream> mSrcStream;
// True once mSrcStream's initial set of tracks are known.
bool mSrcStreamTracksAvailable;
// If non-negative, the time we should return for currentTime while playing
// mSrcStream.
double mSrcStreamPausedCurrentTime;
// Holds a reference to the stream connecting this stream to the capture sink.
RefPtr<MediaInputPort> mCaptureStreamPort;
// Holds references to the DOM wrappers for the MediaStreams that we're
// writing to.
nsTArray<OutputMediaStream> mOutputStreams;
// Holds a reference to the MediaStreamListener attached to mSrcStream's
// playback stream.
RefPtr<StreamListener> mMediaStreamListener;
// Holds a reference to the size-getting MediaStreamListener attached to
// mSrcStream.
RefPtr<StreamSizeListener> mMediaStreamSizeListener;
// The selected video stream track which contained mMediaStreamSizeListener.
RefPtr<VideoStreamTrack> mSelectedVideoStreamTrack;
const RefPtr<ShutdownObserver> mShutdownObserver;
// Holds a reference to the MediaSource, if any, referenced by the src
// attribute on the media element.
RefPtr<MediaSource> mSrcMediaSource;
// Holds a reference to the MediaSource supplying data for playback. This
// may either match mSrcMediaSource or come from Source element children.
// This is set when and only when mLoadingSrc corresponds to an object url
// that resolved to a MediaSource.
RefPtr<MediaSource> mMediaSource;
RefPtr<ChannelLoader> mChannelLoader;
// The current media load ID. This is incremented every time we start a
// new load. Async events note the ID when they're first sent, and only fire
// if the ID is unchanged when they come to fire.
uint32_t mCurrentLoadID;
// Points to the child source elements, used to iterate through the children
// when selecting a resource to load.
RefPtr<nsRange> mSourcePointer;
// Points to the document whose load we're blocking. This is the document
// we're bound to when loading starts.
nsCOMPtr<nsIDocument> mLoadBlockedDoc;
// Contains names of events that have been raised while in the bfcache.
// These events get re-dispatched when the bfcache is exited.
nsTArray<nsString> mPendingEvents;
// Media loading flags. See:
// http://www.whatwg.org/specs/web-apps/current-work/#video)
nsMediaNetworkState mNetworkState;
Watchable<nsMediaReadyState> mReadyState;
enum LoadAlgorithmState {
// No load algorithm instance is waiting for a source to be added to the
// media in order to continue loading.
// We've run the load algorithm, and we tried all source children of the
// media element, and failed to load any successfully. We're waiting for
// another source element to be added to the media element, and will try
// to load any such element when its added.
// Denotes the waiting state of a load algorithm instance. When the load
// algorithm is waiting for a source element child to be added, this is set
// to WAITING_FOR_SOURCE, otherwise it's NOT_WAITING.
LoadAlgorithmState mLoadWaitStatus;
// Current audio volume
double mVolume;
nsAutoPtr<const MetadataTags> mTags;
// URI of the resource we're attempting to load. This stores the value we
// return in the currentSrc attribute. Use GetCurrentSrc() to access the
// currentSrc attribute.
// This is always the original URL we're trying to load --- before
// redirects etc.
nsCOMPtr<nsIURI> mLoadingSrc;
// Stores the current preload action for this element. Initially set to
// PRELOAD_UNDEFINED, its value is changed by calling
// UpdatePreloadAction().
PreloadAction mPreloadAction;
// Time that the last timeupdate event was fired. Read/Write from the
// main thread only.
TimeStamp mTimeUpdateTime;
// Time that the last progress event was fired. Read/Write from the
// main thread only.
TimeStamp mProgressTime;
// Time that data was last read from the media resource. Used for
// computing if the download has stalled and to rate limit progress events
// when data is arriving slower than PROGRESS_MS.
// Read/Write from the main thread only.
TimeStamp mDataTime;
// Media 'currentTime' value when the last timeupdate event occurred.
// Read/Write from the main thread only.
double mLastCurrentTime;
// Logical start time of the media resource in seconds as obtained
// from any media fragments. A negative value indicates that no
// fragment time has been set. Read/Write from the main thread only.
double mFragmentStart;
// Logical end time of the media resource in seconds as obtained
// from any media fragments. A negative value indicates that no
// fragment time has been set. Read/Write from the main thread only.
double mFragmentEnd;
// The defaultPlaybackRate attribute gives the desired speed at which the
// media resource is to play, as a multiple of its intrinsic speed.
double mDefaultPlaybackRate;
// The playbackRate attribute gives the speed at which the media resource
// plays, as a multiple of its intrinsic speed. If it is not equal to the
// defaultPlaybackRate, then the implication is that the user is using a
// feature such as fast forward or slow motion playback.
double mPlaybackRate;
// True if pitch correction is applied when playbackRate is set to a
// non-intrinsic value.
bool mPreservesPitch;
// Reference to the source element last returned by GetNextSource().
// This is the child source element which we're trying to load from.
nsCOMPtr<nsIContent> mSourceLoadCandidate;
// Range of time played.
RefPtr<TimeRanges> mPlayed;
// Timer used for updating progress events.
nsCOMPtr<nsITimer> mProgressTimer;
// Timer used to simulate video-suspend.
nsCOMPtr<nsITimer> mVideoDecodeSuspendTimer;
#ifdef MOZ_EME
// Encrypted Media Extension media keys.
RefPtr<MediaKeys> mMediaKeys;
// Stores the time at the start of the current 'played' range.
double mCurrentPlayRangeStart;
// If true then we have begun downloading the media content.
// Set to false when completed, or not yet started.
bool mBegun;
// True if loadeddata has been fired.
bool mLoadedDataFired;
// Indicates whether current playback is a result of user action
// (ie. calling of the Play method), or automatic playback due to
// the 'autoplay' attribute being set. A true value indicates the
// latter case.
// The 'autoplay' HTML attribute indicates that the video should
// start playing when loaded. The 'autoplay' attribute of the object
// is a mirror of the HTML attribute. These are different from this
// 'mAutoplaying' flag, which indicates whether the current playback
// is a result of the autoplay attribute.
bool mAutoplaying;
// Indicates whether |autoplay| will actually autoplay based on the pref
// media.autoplay.enabled
bool mAutoplayEnabled;
// Playback of the video is paused either due to calling the
// 'Pause' method, or playback not yet having started.
WakeLockBoolWrapper mPaused;
enum MutedReasons {
uint32_t mMuted;
SuspendTypes mAudioChannelSuspended;
// True if the media statistics are currently being shown by the builtin
// video controls
bool mStatsShowing;
// The following two fields are here for the private storage of the builtin
// video controls, and control 'casting' of the video to external devices
// (TVs, projectors etc.)
// True if casting is currently allowed
bool mAllowCasting;
// True if currently casting this video
bool mIsCasting;
// True if the sound is being captured.
bool mAudioCaptured;
// True if the sound is being captured by the window.
bool mAudioCapturedByWindow;
// If TRUE then the media element was actively playing before the currently
// in progress seeking. If FALSE then the media element is either not seeking
// or was not actively playing before the current seek. Used to decide whether
// to raise the 'waiting' event as per in HTML 5 specification.
bool mPlayingBeforeSeek;
// if TRUE then the seek started while content was in active playing state
// if FALSE then the seek started while the content was not playing.
bool mPlayingThroughTheAudioChannelBeforeSeek;
// True iff this element is paused because the document is inactive or has
// been suspended by the audio channel service.
bool mPausedForInactiveDocumentOrChannel;
// True iff event delivery is suspended (mPausedForInactiveDocumentOrChannel must also be true).
bool mEventDeliveryPaused;
// True if we're running the "load()" method.
bool mIsRunningLoadMethod;
// True if we're running or waiting to run queued tasks due to an explicit
// call to "load()".
bool mIsDoingExplicitLoad;
// True if we're loading the resource from the child source elements.
bool mIsLoadingFromSourceChildren;
// True if we're delaying the "load" event. They are delayed until either
// an error occurs, or the first frame is loaded.
bool mDelayingLoadEvent;
// True when we've got a task queued to call SelectResource(),
// or while we're running SelectResource().
bool mIsRunningSelectResource;
// True when we already have select resource call queued
bool mHaveQueuedSelectResource;
// True if we suspended the decoder because we were paused,
// preloading metadata is enabled, autoplay was not enabled, and we loaded
// the first frame.
bool mSuspendedAfterFirstFrame;
// True if we are allowed to suspend the decoder because we were paused,
// preloading metdata was enabled, autoplay was not enabled, and we loaded
// the first frame.
bool mAllowSuspendAfterFirstFrame;
// True if we've played or completed a seek. We use this to determine
// when the poster frame should be shown.
bool mHasPlayedOrSeeked;
// True if we've added a reference to ourselves to keep the element
// alive while no-one is referencing it but the element may still fire
// events of its own accord.
bool mHasSelfReference;
// True if we've received a notification that the engine is shutting
// down.
bool mShuttingDown;
// True if we've suspended a load in the resource selection algorithm
// due to loading a preload:none media. When true, the resource we'll
// load when the user initiates either playback or an explicit load is
// stored in mPreloadURI.
bool mSuspendedForPreloadNone;
// True if we've connected mSrcStream to the media element output.
bool mSrcStreamIsPlaying;
// True if a same-origin check has been done for the media element and resource.
bool mMediaSecurityVerified;
// The CORS mode when loading the media element
// Info about the played media.
MediaInfo mMediaInfo;
// True if the media has encryption information.
bool mIsEncrypted;
enum WaitingForKeyState {
// True when the CDM cannot decrypt the current block due to lacking a key.
// Note: the "waitingforkey" event is not dispatched until all decoded data
// has been rendered.
WaitingForKeyState mWaitingForKey;
// Listens for waitingForKey events from the owned decoder.
MediaEventListener mWaitingForKeyListener;
#ifdef MOZ_EME
// Init Data that needs to be sent in 'encrypted' events in MetadataLoaded().
EncryptionInfo mPendingEncryptedInitData;
// True if the media's channel's download has been suspended.
Watchable<bool> mDownloadSuspendedByCache;
// Audio Channel.
AudioChannel mAudioChannel;
// The audio channel volume
float mAudioChannelVolume;
// Is this media element playing?
bool mPlayingThroughTheAudioChannel;
// Disable the video playback by track selection. This flag might not be
// enough if we ever expand the ability of supporting multi-tracks video
// playback.
bool mDisableVideo;
// An agent used to join audio channel service and its life cycle would equal
// to media element.
RefPtr<AudioChannelAgent> mAudioChannelAgent;
RefPtr<TextTrackManager> mTextTrackManager;
RefPtr<AudioTrackList> mAudioTrackList;
RefPtr<VideoTrackList> mVideoTrackList;
nsAutoPtr<MediaStreamTrackListener> mMediaStreamTrackListener;
// The principal guarding mVideoFrameContainer access when playing a
// MediaStream.
nsCOMPtr<nsIPrincipal> mSrcStreamVideoPrincipal;
// True if UnbindFromTree() is called on the element.
// Note this flag is false when the element is in a phase after creation and
// before attaching to the DOM tree.
bool mUnboundFromTree = false;
// Indicates if user has interacted with the element.
// Used to block autoplay when disabled.
bool mHasUserInteraction;
// True if the first frame has been successfully loaded.
bool mFirstFrameLoaded;
// Media elements also have a default playback start position, which must
// initially be set to zero seconds. This time is used to allow the element to
// be seeked even before the media is loaded.
double mDefaultPlaybackStartPosition;
// True if the audio track is not silent.
bool mIsAudioTrackAudible;
// Indicate whether media element is audible for users.
AudibleState mAudible;
Visibility mVisibilityState;
UniquePtr<ErrorSink> mErrorSink;
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_HTMLMediaElement_h