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gecko-dev/dom/html/HTMLMediaElement.cpp

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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/. */
#ifdef XP_WIN
# include "objbase.h"
// Some Windows header defines this, so undef it as it conflicts with our
// function of the same name.
# undef GetCurrentTime
#endif
#include "mozilla/dom/HTMLMediaElement.h"
#include "AudioChannelService.h"
#include "AudioDeviceInfo.h"
#include "AudioStreamTrack.h"
#include "AutoplayPolicy.h"
#include "ChannelMediaDecoder.h"
#include "DOMMediaStream.h"
#include "DecoderDoctorDiagnostics.h"
#include "DecoderDoctorLogger.h"
#include "DecoderTraits.h"
#include "FrameStatistics.h"
#include "GMPCrashHelper.h"
#ifdef MOZ_ANDROID_HLS_SUPPORT
# include "HLSDecoder.h"
#endif
#include "HTMLMediaElement.h"
#include "ImageContainer.h"
#include "Layers.h"
#include "MP4Decoder.h"
#include "MediaContainerType.h"
#include "MediaError.h"
#include "MediaManager.h"
#include "MediaMetadataManager.h"
#include "MediaResource.h"
#include "MediaShutdownManager.h"
#include "MediaSourceDecoder.h"
#include "MediaStreamError.h"
#include "MediaStreamGraph.h"
#include "MediaStreamListener.h"
#include "MediaTrackList.h"
#include "SVGObserverUtils.h"
#include "TimeRanges.h"
#include "VideoFrameContainer.h"
#include "VideoOutput.h"
#include "VideoStreamTrack.h"
#include "base/basictypes.h"
#include "jsapi.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/EMEUtils.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/NotNull.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/Sprintf.h"
#include "mozilla/StaticPrefs.h"
#include "mozilla/Telemetry.h"
#include "mozilla/dom/AudioTrack.h"
#include "mozilla/dom/AudioTrackList.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/ElementInlines.h"
#include "mozilla/dom/HTMLAudioElement.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLMediaElementBinding.h"
#include "mozilla/dom/HTMLSourceElement.h"
#include "mozilla/dom/HTMLVideoElement.h"
#include "mozilla/dom/MediaEncryptedEvent.h"
#include "mozilla/dom/MediaErrorBinding.h"
#include "mozilla/dom/MediaSource.h"
#include "mozilla/dom/PlayPromise.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/TextTrack.h"
#include "mozilla/dom/VideoPlaybackQuality.h"
#include "mozilla/dom/VideoTrack.h"
#include "mozilla/dom/VideoTrackList.h"
#include "mozilla/dom/WakeLock.h"
#include "mozilla/dom/power/PowerManagerService.h"
#include "mozilla/net/UrlClassifierFeatureFactory.h"
#include "nsAttrValueInlines.h"
#include "nsContentPolicyUtils.h"
#include "nsContentUtils.h"
#include "nsCycleCollectionParticipant.h"
#include "nsDisplayList.h"
#include "nsDocShell.h"
#include "nsError.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsIAutoplay.h"
#include "nsICachingChannel.h"
#include "nsICategoryManager.h"
#include "nsIClassOfService.h"
#include "nsIContentPolicy.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIDocShell.h"
#include "mozilla/dom/Document.h"
#include "nsIFrame.h"
#include "nsIObserverService.h"
#include "nsIPermissionManager.h"
#include "nsIRequest.h"
#include "nsIScriptError.h"
#include "nsIScriptSecurityManager.h"
#include "nsISupportsPrimitives.h"
#include "nsIThreadInternal.h"
#include "nsITimer.h"
#include "nsIXPConnect.h"
#include "nsJSUtils.h"
#include "nsLayoutUtils.h"
#include "nsMediaFragmentURIParser.h"
#include "nsMimeTypes.h"
#include "nsNetUtil.h"
#include "nsNodeInfoManager.h"
#include "nsPresContext.h"
#include "nsQueryObject.h"
#include "nsRange.h"
#include "nsSize.h"
#include "nsThreadUtils.h"
#include "nsURIHashKey.h"
#include "nsVideoFrame.h"
#include "ReferrerInfo.h"
#include "xpcpublic.h"
#include <algorithm>
#include <cmath>
#include <limits>
mozilla::LazyLogModule gMediaElementLog("nsMediaElement");
static mozilla::LazyLogModule gMediaElementEventsLog("nsMediaElementEvents");
extern mozilla::LazyLogModule gAutoplayPermissionLog;
#define AUTOPLAY_LOG(msg, ...) \
MOZ_LOG(gAutoplayPermissionLog, LogLevel::Debug, (msg, ##__VA_ARGS__))
#define LOG(type, msg) MOZ_LOG(gMediaElementLog, type, msg)
#define LOG_EVENT(type, msg) MOZ_LOG(gMediaElementEventsLog, type, msg)
using namespace mozilla::layers;
using mozilla::net::nsMediaFragmentURIParser;
using namespace mozilla::dom::HTMLMediaElement_Binding;
namespace mozilla {
namespace dom {
// Number of milliseconds between progress events as defined by spec
static const uint32_t PROGRESS_MS = 350;
// Number of milliseconds of no data before a stall event is fired as defined by
// spec
static const uint32_t STALL_MS = 3000;
// Used by AudioChannel for suppresssing the volume to this ratio.
#define FADED_VOLUME_RATIO 0.25
// These constants are arbitrary
// Minimum playbackRate for a media
static const double MIN_PLAYBACKRATE = 1.0 / 16;
// Maximum playbackRate for a media
static const double MAX_PLAYBACKRATE = 16.0;
// These are the limits beyonds which SoundTouch does not perform too well and
// when speech is hard to understand anyway. Threshold above which audio is
// muted
static const double THRESHOLD_HIGH_PLAYBACKRATE_AUDIO = 4.0;
// Threshold under which audio is muted
static const double THRESHOLD_LOW_PLAYBACKRATE_AUDIO = 0.25;
static double ClampPlaybackRate(double aPlaybackRate) {
MOZ_ASSERT(aPlaybackRate >= 0.0);
if (aPlaybackRate == 0.0) {
return aPlaybackRate;
}
if (aPlaybackRate < MIN_PLAYBACKRATE) {
return MIN_PLAYBACKRATE;
}
if (aPlaybackRate > MAX_PLAYBACKRATE) {
return MAX_PLAYBACKRATE;
}
return aPlaybackRate;
}
// Media error values. These need to match the ones in MediaError.webidl.
static const unsigned short MEDIA_ERR_ABORTED = 1;
static const unsigned short MEDIA_ERR_NETWORK = 2;
static const unsigned short MEDIA_ERR_DECODE = 3;
static const unsigned short MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
static void ResolvePromisesWithUndefined(
const nsTArray<RefPtr<PlayPromise>>& aPromises) {
for (auto& promise : aPromises) {
promise->MaybeResolveWithUndefined();
}
}
static void RejectPromises(const nsTArray<RefPtr<PlayPromise>>& aPromises,
nsresult aError) {
for (auto& promise : aPromises) {
promise->MaybeReject(aError);
}
}
// Under certain conditions there may be no-one holding references to
// a media element from script, DOM parent, etc, but the element may still
// fire meaningful events in the future so we can't destroy it yet:
// 1) If the element is delaying the load event (or would be, if it were
// in a document), then events up to loadeddata or error could be fired,
// so we need to stay alive.
// 2) If the element is not paused and playback has not ended, then
// we will (or might) play, sending timeupdate and ended events and possibly
// audio output, so we need to stay alive.
// 3) if the element is seeking then we will fire seeking events and possibly
// start playing afterward, so we need to stay alive.
// 4) If autoplay could start playback in this element (if we got enough data),
// then we need to stay alive.
// 5) if the element is currently loading, not suspended, and its source is
// not a MediaSource, then script might be waiting for progress events or a
// 'stalled' or 'suspend' event, so we need to stay alive.
// If we're already suspended then (all other conditions being met),
// it's OK to just disappear without firing any more events,
// since we have the freedom to remain suspended indefinitely. Note
// that we could use this 'suspended' loophole to garbage-collect a suspended
// element in case 4 even if it had 'autoplay' set, but we choose not to.
// If someone throws away all references to a loading 'autoplay' element
// sound should still eventually play.
// 6) If the source is a MediaSource, most loading events will not fire unless
// appendBuffer() is called on a SourceBuffer, in which case something is
// already referencing the SourceBuffer, which keeps the associated media
// element alive. Further, a MediaSource will never time out the resource
// fetch, and so should not keep the media element alive if it is
// unreferenced. A pending 'stalled' event keeps the media element alive.
//
// Media elements owned by inactive documents (i.e. documents not contained in
// any document viewer) should never hold a self-reference because none of the
// above conditions are allowed: the element will stop loading and playing
// and never resume loading or playing unless its owner document changes to
// an active document (which can only happen if there is an external reference
// to the element).
// Media elements with no owner doc should be able to hold a self-reference.
// Something native must have created the element and may expect it to
// stay alive to play.
// It's very important that any change in state which could change the value of
// needSelfReference in AddRemoveSelfReference be followed by a call to
// AddRemoveSelfReference before this element could die!
// It's especially important if needSelfReference would change to 'true',
// since if we neglect to add a self-reference, this element might be
// garbage collected while there are still event listeners that should
// receive events. If we neglect to remove the self-reference then the element
// just lives longer than it needs to.
class nsMediaEvent : public Runnable {
public:
explicit nsMediaEvent(const char* aName, HTMLMediaElement* aElement)
: Runnable(aName),
mElement(aElement),
mLoadID(mElement->GetCurrentLoadID()) {}
~nsMediaEvent() {}
NS_IMETHOD Run() override = 0;
protected:
bool IsCancelled() { return mElement->GetCurrentLoadID() != mLoadID; }
RefPtr<HTMLMediaElement> mElement;
uint32_t mLoadID;
};
class HTMLMediaElement::nsAsyncEventRunner : public nsMediaEvent {
private:
nsString mName;
public:
nsAsyncEventRunner(const nsAString& aName, HTMLMediaElement* aElement)
: nsMediaEvent("HTMLMediaElement::nsAsyncEventRunner", aElement),
mName(aName) {}
NS_IMETHOD Run() override {
// Silently cancel if our load has been cancelled.
if (IsCancelled()) return NS_OK;
return mElement->DispatchEvent(mName);
}
};
/*
* If no error is passed while constructing an instance, the instance will
* resolve the passed promises with undefined; otherwise, the instance will
* reject the passed promises with the passed error.
*
* The constructor appends the constructed instance into the passed media
* element's mPendingPlayPromisesRunners member and once the the runner is run
* (whether fulfilled or canceled), it removes itself from
* mPendingPlayPromisesRunners.
*/
class HTMLMediaElement::nsResolveOrRejectPendingPlayPromisesRunner
: public nsMediaEvent {
nsTArray<RefPtr<PlayPromise>> mPromises;
nsresult mError;
public:
nsResolveOrRejectPendingPlayPromisesRunner(
HTMLMediaElement* aElement, nsTArray<RefPtr<PlayPromise>>&& aPromises,
nsresult aError = NS_OK)
: nsMediaEvent(
"HTMLMediaElement::nsResolveOrRejectPendingPlayPromisesRunner",
aElement),
mPromises(std::move(aPromises)),
mError(aError) {
mElement->mPendingPlayPromisesRunners.AppendElement(this);
}
void ResolveOrReject() {
if (NS_SUCCEEDED(mError)) {
ResolvePromisesWithUndefined(mPromises);
} else {
RejectPromises(mPromises, mError);
}
}
NS_IMETHOD Run() override {
if (!IsCancelled()) {
ResolveOrReject();
}
mElement->mPendingPlayPromisesRunners.RemoveElement(this);
return NS_OK;
}
};
class HTMLMediaElement::nsNotifyAboutPlayingRunner
: public nsResolveOrRejectPendingPlayPromisesRunner {
public:
nsNotifyAboutPlayingRunner(
HTMLMediaElement* aElement,
nsTArray<RefPtr<PlayPromise>>&& aPendingPlayPromises)
: nsResolveOrRejectPendingPlayPromisesRunner(
aElement, std::move(aPendingPlayPromises)) {}
NS_IMETHOD Run() override {
if (IsCancelled()) {
mElement->mPendingPlayPromisesRunners.RemoveElement(this);
return NS_OK;
}
mElement->DispatchEvent(NS_LITERAL_STRING("playing"));
return nsResolveOrRejectPendingPlayPromisesRunner::Run();
}
};
class nsSourceErrorEventRunner : public nsMediaEvent {
private:
nsCOMPtr<nsIContent> mSource;
public:
nsSourceErrorEventRunner(HTMLMediaElement* aElement, nsIContent* aSource)
: nsMediaEvent("dom::nsSourceErrorEventRunner", aElement),
mSource(aSource) {}
NS_IMETHOD Run() override {
// Silently cancel if our load has been cancelled.
if (IsCancelled()) return NS_OK;
LOG_EVENT(LogLevel::Debug,
("%p Dispatching simple event source error", mElement.get()));
return nsContentUtils::DispatchTrustedEvent(
mElement->OwnerDoc(), mSource, NS_LITERAL_STRING("error"),
CanBubble::eNo, Cancelable::eNo);
}
};
/**
* This listener observes the first video frame to arrive with a non-empty size,
* and renders it to its VideoFrameContainer.
*/
class HTMLMediaElement::FirstFrameListener : public VideoOutput {
public:
FirstFrameListener(VideoFrameContainer* aContainer,
AbstractThread* aMainThread)
: VideoOutput(aContainer, aMainThread) {
MOZ_ASSERT(NS_IsMainThread());
}
// NB that this overrides VideoOutput::NotifyRealtimeTrackData, so we can
// filter out all frames but the first one with a real size. This allows us to
// later re-use the logic in VideoOutput for rendering that frame.
void NotifyRealtimeTrackData(MediaStreamGraph* aGraph,
StreamTime aTrackOffset,
const MediaSegment& aMedia) override {
MOZ_ASSERT(aMedia.GetType() == MediaSegment::VIDEO);
if (mInitialSizeFound) {
return;
}
const VideoSegment& video = static_cast<const VideoSegment&>(aMedia);
for (VideoSegment::ConstChunkIterator c(video); !c.IsEnded(); c.Next()) {
if (c->mFrame.GetIntrinsicSize() != gfx::IntSize(0, 0)) {
mInitialSizeFound = true;
// Pick the first frame and run it through the rendering code.
VideoSegment segment;
segment.AppendFrame(do_AddRef(c->mFrame.GetImage()),
c->mFrame.GetIntrinsicSize(),
c->mFrame.GetPrincipalHandle(),
c->mFrame.GetForceBlack(), c->mTimeStamp);
VideoOutput::NotifyRealtimeTrackData(aGraph, aTrackOffset, segment);
return;
}
}
}
private:
// Whether a frame with a concrete size has been received. May only be
// accessed on the MSG's appending thread. (this is a direct listener so we
// get called by whoever is producing this track's data)
bool mInitialSizeFound = false;
};
class HTMLMediaElement::StreamCaptureTrackSource
: public MediaStreamTrackSource,
public MediaStreamTrackSource::Sink {
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(StreamCaptureTrackSource,
MediaStreamTrackSource)
StreamCaptureTrackSource(HTMLMediaElement* aElement,
MediaStreamTrackSource* aCapturedTrackSource,
DOMMediaStream* aOwningStream,
TrackID aDestinationTrackID)
: MediaStreamTrackSource(aCapturedTrackSource->GetPrincipal(),
nsString()),
mElement(aElement),
mCapturedTrackSource(aCapturedTrackSource),
mOwningStream(aOwningStream),
mDestinationTrackID(aDestinationTrackID) {
MOZ_ASSERT(mElement);
MOZ_ASSERT(mCapturedTrackSource);
MOZ_ASSERT(mOwningStream);
MOZ_ASSERT(IsTrackIDExplicit(mDestinationTrackID));
mCapturedTrackSource->RegisterSink(this);
}
void Destroy() override {
if (mCapturedTrackSource) {
mCapturedTrackSource->UnregisterSink(this);
mCapturedTrackSource = nullptr;
}
}
MediaSourceEnum GetMediaSource() const override {
return MediaSourceEnum::Other;
}
void Stop() override {
if (mElement && mElement->mSrcStream) {
// Only notify if we're still playing the source stream. GC might have
// cleared it before the track sources.
mElement->NotifyOutputTrackStopped(mOwningStream, mDestinationTrackID);
}
mElement = nullptr;
mOwningStream = nullptr;
Destroy();
}
/**
* Do not keep the track source alive. The source lifetime is controlled by
* its associated tracks.
*/
bool KeepsSourceAlive() const override { return false; }
/**
* Do not keep the track source on. It is controlled by its associated tracks.
*/
bool Enabled() const override { return false; }
void Disable() override {}
void Enable() override {}
void PrincipalChanged() override {
if (!mCapturedTrackSource) {
// This could happen during shutdown.
return;
}
mPrincipal = mCapturedTrackSource->GetPrincipal();
MediaStreamTrackSource::PrincipalChanged();
}
void MutedChanged(bool aNewState) override {
if (!mCapturedTrackSource) {
// This could happen during shutdown.
return;
}
MediaStreamTrackSource::MutedChanged(aNewState);
}
private:
virtual ~StreamCaptureTrackSource() = default;
RefPtr<HTMLMediaElement> mElement;
RefPtr<MediaStreamTrackSource> mCapturedTrackSource;
RefPtr<DOMMediaStream> mOwningStream;
TrackID mDestinationTrackID;
};
NS_IMPL_ADDREF_INHERITED(HTMLMediaElement::StreamCaptureTrackSource,
MediaStreamTrackSource)
NS_IMPL_RELEASE_INHERITED(HTMLMediaElement::StreamCaptureTrackSource,
MediaStreamTrackSource)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(
HTMLMediaElement::StreamCaptureTrackSource)
NS_INTERFACE_MAP_END_INHERITING(MediaStreamTrackSource)
NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLMediaElement::StreamCaptureTrackSource,
MediaStreamTrackSource, mElement,
mCapturedTrackSource, mOwningStream)
/**
* There is a reference cycle involving this class: MediaLoadListener
* holds a reference to the HTMLMediaElement, which holds a reference
* to an nsIChannel, which holds a reference to this listener.
* We break the reference cycle in OnStartRequest by clearing mElement.
*/
class HTMLMediaElement::MediaLoadListener final
: public nsIStreamListener,
public nsIChannelEventSink,
public nsIInterfaceRequestor,
public nsIObserver,
public nsIThreadRetargetableStreamListener {
~MediaLoadListener() {}
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIOBSERVER
NS_DECL_NSIINTERFACEREQUESTOR
NS_DECL_NSITHREADRETARGETABLESTREAMLISTENER
public:
explicit MediaLoadListener(HTMLMediaElement* aElement)
: mElement(aElement), mLoadID(aElement->GetCurrentLoadID()) {
MOZ_ASSERT(mElement, "Must pass an element to call back");
}
private:
RefPtr<HTMLMediaElement> mElement;
nsCOMPtr<nsIStreamListener> mNextListener;
const uint32_t mLoadID;
};
NS_IMPL_ISUPPORTS(HTMLMediaElement::MediaLoadListener, nsIRequestObserver,
nsIStreamListener, nsIChannelEventSink, nsIInterfaceRequestor,
nsIObserver, nsIThreadRetargetableStreamListener)
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) {
nsContentUtils::UnregisterShutdownObserver(this);
// Clear mElement to break cycle so we don't leak on shutdown
mElement = nullptr;
return NS_OK;
}
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::OnStartRequest(nsIRequest* aRequest) {
nsContentUtils::UnregisterShutdownObserver(this);
if (!mElement) {
// We've been notified by the shutdown observer, and are shutting down.
return NS_BINDING_ABORTED;
}
// Media element playback is not currently supported when recording or
// replaying. See bug 1304146.
if (recordreplay::IsRecordingOrReplaying()) {
mElement->ReportLoadError("Media elements not available when recording");
return NS_ERROR_NOT_AVAILABLE;
}
// The element is only needed until we've had a chance to call
// InitializeDecoderForChannel. So make sure mElement is cleared here.
RefPtr<HTMLMediaElement> element;
element.swap(mElement);
AbstractThread::AutoEnter context(element->AbstractMainThread());
if (mLoadID != element->GetCurrentLoadID()) {
// The channel has been cancelled before we had a chance to create
// a decoder. Abort, don't dispatch an "error" event, as the new load
// may not be in an error state.
return NS_BINDING_ABORTED;
}
// Don't continue to load if the request failed or has been canceled.
nsresult status;
nsresult rv = aRequest->GetStatus(&status);
NS_ENSURE_SUCCESS(rv, rv);
if (NS_FAILED(status)) {
if (element) {
// Handle media not loading error because source was a tracking URL (or
// fingerprinting, cryptomining, etc).
// We make a note of this media node by including it in a dedicated
// array of blocked tracking nodes under its parent document.
if (net::UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(
status)) {
Document* ownerDoc = element->OwnerDoc();
if (ownerDoc) {
ownerDoc->AddBlockedNodeByClassifier(element);
}
}
element->NotifyLoadError(
nsPrintfCString("%u: %s", uint32_t(status), "Request failed"));
}
return status;
}
nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(aRequest);
bool succeeded;
if (hc && NS_SUCCEEDED(hc->GetRequestSucceeded(&succeeded)) && !succeeded) {
uint32_t responseStatus = 0;
Unused << hc->GetResponseStatus(&responseStatus);
nsAutoCString statusText;
Unused << hc->GetResponseStatusText(statusText);
element->NotifyLoadError(
nsPrintfCString("%u: %s", responseStatus, statusText.get()));
nsAutoString code;
code.AppendInt(responseStatus);
nsAutoString src;
element->GetCurrentSrc(src);
AutoTArray<nsString, 2> params = {code, src};
element->ReportLoadError("MediaLoadHttpError", params);
return NS_BINDING_ABORTED;
}
nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
if (channel &&
NS_SUCCEEDED(rv = element->InitializeDecoderForChannel(
channel, getter_AddRefs(mNextListener))) &&
mNextListener) {
rv = mNextListener->OnStartRequest(aRequest);
} else {
// If InitializeDecoderForChannel() returned an error, fire a network error.
if (NS_FAILED(rv) && !mNextListener) {
// Load failed, attempt to load the next candidate resource. If there
// are none, this will trigger a MEDIA_ERR_SRC_NOT_SUPPORTED error.
element->NotifyLoadError(NS_LITERAL_CSTRING("Failed to init decoder"));
}
// If InitializeDecoderForChannel did not return a listener (but may
// have otherwise succeeded), we abort the connection since we aren't
// interested in keeping the channel alive ourselves.
rv = NS_BINDING_ABORTED;
}
return rv;
}
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::OnStopRequest(nsIRequest* aRequest,
nsresult aStatus) {
if (mNextListener) {
return mNextListener->OnStopRequest(aRequest, aStatus);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::OnDataAvailable(nsIRequest* aRequest,
nsIInputStream* aStream,
uint64_t aOffset,
uint32_t aCount) {
if (!mNextListener) {
NS_ERROR(
"Must have a chained listener; OnStartRequest should have "
"canceled this request");
return NS_BINDING_ABORTED;
}
return mNextListener->OnDataAvailable(aRequest, aStream, aOffset, aCount);
}
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::AsyncOnChannelRedirect(
nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aFlags,
nsIAsyncVerifyRedirectCallback* cb) {
// TODO is this really correct?? See bug #579329.
if (mElement) {
mElement->OnChannelRedirect(aOldChannel, aNewChannel, aFlags);
}
nsCOMPtr<nsIChannelEventSink> sink = do_QueryInterface(mNextListener);
if (sink) {
return sink->AsyncOnChannelRedirect(aOldChannel, aNewChannel, aFlags, cb);
}
cb->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::CheckListenerChain() {
MOZ_ASSERT(mNextListener);
nsCOMPtr<nsIThreadRetargetableStreamListener> retargetable =
do_QueryInterface(mNextListener);
if (retargetable) {
return retargetable->CheckListenerChain();
}
return NS_ERROR_NO_INTERFACE;
}
NS_IMETHODIMP
HTMLMediaElement::MediaLoadListener::GetInterface(const nsIID& aIID,
void** aResult) {
return QueryInterface(aIID, aResult);
}
void HTMLMediaElement::ReportLoadError(const char* aMsg,
const nsTArray<nsString>& aParams) {
ReportToConsole(nsIScriptError::warningFlag, aMsg, aParams);
}
void HTMLMediaElement::ReportToConsole(
uint32_t aErrorFlags, const char* aMsg,
const nsTArray<nsString>& aParams) const {
nsContentUtils::ReportToConsole(aErrorFlags, NS_LITERAL_CSTRING("Media"),
OwnerDoc(), nsContentUtils::eDOM_PROPERTIES,
aMsg, aParams);
}
class HTMLMediaElement::AudioChannelAgentCallback final
: public nsIAudioChannelAgentCallback {
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS(AudioChannelAgentCallback)
explicit AudioChannelAgentCallback(HTMLMediaElement* aOwner)
: mOwner(aOwner),
mAudioChannelVolume(1.0),
mPlayingThroughTheAudioChannel(false),
mAudioCapturedByWindow(false),
mSuspended(nsISuspendedTypes::NONE_SUSPENDED),
mIsOwnerAudible(IsOwnerAudible()),
mIsShutDown(false) {
MOZ_ASSERT(mOwner);
MaybeCreateAudioChannelAgent();
}
void UpdateAudioChannelPlayingState(bool aForcePlaying = false) {
MOZ_ASSERT(!mIsShutDown);
bool playingThroughTheAudioChannel =
aForcePlaying || IsPlayingThroughTheAudioChannel();
if (playingThroughTheAudioChannel != mPlayingThroughTheAudioChannel) {
if (!MaybeCreateAudioChannelAgent()) {
return;
}
mPlayingThroughTheAudioChannel = playingThroughTheAudioChannel;
NotifyAudioChannelAgent(mPlayingThroughTheAudioChannel);
}
}
bool ShouldResetSuspend() const {
// The disposable-pause should be clear after media starts playing.
if (!mOwner->Paused() &&
mSuspended == nsISuspendedTypes::SUSPENDED_PAUSE_DISPOSABLE) {
return true;
}
// If the blocked media is paused, we don't need to resume it. We reset the
// mSuspended in order to unregister the agent.
if (mOwner->Paused() && mSuspended == nsISuspendedTypes::SUSPENDED_BLOCK) {
return true;
}
return false;
}
void NotifyPlayStateChanged() {
MOZ_ASSERT(!mIsShutDown);
if (ShouldResetSuspend()) {
SetSuspended(nsISuspendedTypes::NONE_SUSPENDED);
NotifyAudioPlaybackChanged(
AudioChannelService::AudibleChangedReasons::ePauseStateChanged);
}
UpdateAudioChannelPlayingState();
}
NS_IMETHODIMP WindowVolumeChanged(float aVolume, bool aMuted) override {
MOZ_ASSERT(mAudioChannelAgent);
MOZ_LOG(
AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
("HTMLMediaElement::AudioChannelAgentCallback, WindowVolumeChanged, "
"this = %p, aVolume = %f, aMuted = %s\n",
this, aVolume, aMuted ? "true" : "false"));
if (mAudioChannelVolume != aVolume) {
mAudioChannelVolume = aVolume;
mOwner->SetVolumeInternal();
}
const uint32_t muted = mOwner->mMuted;
if (aMuted && !mOwner->ComputedMuted()) {
mOwner->SetMutedInternal(muted | MUTED_BY_AUDIO_CHANNEL);
} else if (!aMuted && mOwner->ComputedMuted()) {
mOwner->SetMutedInternal(muted & ~MUTED_BY_AUDIO_CHANNEL);
}
return NS_OK;
}
NS_IMETHODIMP WindowSuspendChanged(SuspendTypes aSuspend) override {
MOZ_ASSERT(mAudioChannelAgent);
MOZ_LOG(
AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
("HTMLMediaElement::AudioChannelAgentCallback, WindowSuspendChanged, "
"this = %p, aSuspend = %s\n",
this, SuspendTypeToStr(aSuspend)));
switch (aSuspend) {
case nsISuspendedTypes::NONE_SUSPENDED:
Resume();
break;
case nsISuspendedTypes::SUSPENDED_PAUSE:
case nsISuspendedTypes::SUSPENDED_PAUSE_DISPOSABLE:
case nsISuspendedTypes::SUSPENDED_BLOCK:
Suspend(aSuspend);
break;
case nsISuspendedTypes::SUSPENDED_STOP_DISPOSABLE:
Stop();
break;
default:
MOZ_LOG(AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
("HTMLMediaElement::AudioChannelAgentCallback, "
"WindowSuspendChanged, "
"this = %p, Error : unknown suspended type!\n",
this));
}
return NS_OK;
}
NS_IMETHODIMP WindowAudioCaptureChanged(bool aCapture) override {
MOZ_ASSERT(mAudioChannelAgent);
if (mAudioCapturedByWindow != aCapture) {
mAudioCapturedByWindow = aCapture;
AudioCaptureStreamChangeIfNeeded();
}
return NS_OK;
}
void AudioCaptureStreamChangeIfNeeded() {
MOZ_ASSERT(!mIsShutDown);
if (!IsPlayingStarted()) {
return;
}
if (!mOwner->HasAudio()) {
return;
}
mOwner->AudioCaptureStreamChange(mAudioCapturedByWindow);
}
void NotifyAudioPlaybackChanged(AudibleChangedReasons aReason) {
MOZ_ASSERT(!mIsShutDown);
if (!IsPlayingStarted()) {
return;
}
AudibleState newAudibleState = IsOwnerAudible();
if (mIsOwnerAudible == newAudibleState) {
return;
}
mIsOwnerAudible = newAudibleState;
mAudioChannelAgent->NotifyStartedAudible(mIsOwnerAudible, aReason);
}
bool IsPlaybackBlocked() {
MOZ_ASSERT(!mIsShutDown);
// If the tab hasn't been activated yet, the media element in that tab can't
// be playback now until the tab goes to foreground first time or user
// clicks the unblocking tab icon.
if (!IsTabActivated()) {
// Even we haven't start playing yet, we still need to notify the audio
// channe system because we need to receive the resume notification later.
UpdateAudioChannelPlayingState(true /* force to start */);
return true;
}
return false;
}
void Shutdown() {
MOZ_ASSERT(!mIsShutDown);
if (mAudioChannelAgent) {
mAudioChannelAgent->NotifyStoppedPlaying();
mAudioChannelAgent = nullptr;
}
mIsShutDown = true;
}
float GetEffectiveVolume() const {
MOZ_ASSERT(!mIsShutDown);
return mOwner->Volume() * mAudioChannelVolume;
}
SuspendTypes GetSuspendType() const {
MOZ_ASSERT(!mIsShutDown);
return mSuspended;
}
private:
~AudioChannelAgentCallback() { MOZ_ASSERT(mIsShutDown); };
bool MaybeCreateAudioChannelAgent() {
if (mAudioChannelAgent) {
return true;
}
mAudioChannelAgent = new AudioChannelAgent();
nsresult rv =
mAudioChannelAgent->Init(mOwner->OwnerDoc()->GetInnerWindow(), this);
if (NS_WARN_IF(NS_FAILED(rv))) {
mAudioChannelAgent = nullptr;
MOZ_LOG(
AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
("HTMLMediaElement::AudioChannelAgentCallback, Fail to initialize "
"the audio channel agent, this = %p\n",
this));
return false;
}
return true;
}
void NotifyAudioChannelAgent(bool aPlaying) {
MOZ_ASSERT(mAudioChannelAgent);
if (aPlaying) {
AudioPlaybackConfig config;
nsresult rv =
mAudioChannelAgent->NotifyStartedPlaying(&config, IsOwnerAudible());
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
WindowVolumeChanged(config.mVolume, config.mMuted);
WindowSuspendChanged(config.mSuspend);
} else {
mAudioChannelAgent->NotifyStoppedPlaying();
}
}
void SetSuspended(SuspendTypes aSuspend) {
if (mSuspended == aSuspend) {
return;
}
MaybeNotifyMediaResumed(aSuspend);
mSuspended = aSuspend;
MOZ_LOG(AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
("HTMLMediaElement::AudioChannelAgentCallback, "
"SetAudioChannelSuspended, "
"this = %p, aSuspend = %s\n",
this, SuspendTypeToStr(aSuspend)));
}
void Resume() {
if (!IsSuspended()) {
MOZ_LOG(AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
("HTMLMediaElement::AudioChannelAgentCallback, "
"ResumeFromAudioChannel, "
"this = %p, don't need to be resumed!\n",
this));
return;
}
SetSuspended(nsISuspendedTypes::NONE_SUSPENDED);
IgnoredErrorResult rv;
RefPtr<Promise> toBeIgnored = mOwner->Play(rv);
MOZ_ASSERT_IF(
toBeIgnored && toBeIgnored->State() == Promise::PromiseState::Rejected,
rv.Failed());
if (rv.Failed()) {
NS_WARNING("Not able to resume from AudioChannel.");
}
NotifyAudioPlaybackChanged(
AudioChannelService::AudibleChangedReasons::ePauseStateChanged);
}
void Suspend(SuspendTypes aSuspend) {
if (IsSuspended()) {
return;
}
SetSuspended(aSuspend);
if (aSuspend == nsISuspendedTypes::SUSPENDED_PAUSE ||
aSuspend == nsISuspendedTypes::SUSPENDED_PAUSE_DISPOSABLE) {
IgnoredErrorResult rv;
mOwner->Pause(rv);
if (NS_WARN_IF(rv.Failed())) {
return;
}
}
NotifyAudioPlaybackChanged(
AudioChannelService::AudibleChangedReasons::ePauseStateChanged);
}
void Stop() {
SetSuspended(nsISuspendedTypes::NONE_SUSPENDED);
mOwner->Pause();
}
bool IsPlayingStarted() {
if (MaybeCreateAudioChannelAgent()) {
return mAudioChannelAgent->IsPlayingStarted();
}
return false;
}
void MaybeNotifyMediaResumed(SuspendTypes aSuspend) {
// In fennec, we should send the notification when media is resumed from the
// pause-disposable which was called by media control.
if (mSuspended != nsISuspendedTypes::SUSPENDED_PAUSE_DISPOSABLE &&
aSuspend != nsISuspendedTypes::NONE_SUSPENDED) {
return;
}
if (!IsPlayingStarted()) {
return;
}
uint64_t windowID = mAudioChannelAgent->WindowID();
mOwner->MainThreadEventTarget()->Dispatch(NS_NewRunnableFunction(
"dom::HTMLMediaElement::AudioChannelAgentCallback::"
"MaybeNotifyMediaResumed",
[windowID]() -> void {
nsCOMPtr<nsIObserverService> observerService =
services::GetObserverService();
if (NS_WARN_IF(!observerService)) {
return;
}
nsCOMPtr<nsISupportsPRUint64> wrapper =
do_CreateInstance(NS_SUPPORTS_PRUINT64_CONTRACTID);
if (NS_WARN_IF(!wrapper)) {
return;
}
wrapper->SetData(windowID);
observerService->NotifyObservers(wrapper, "media-playback-resumed",
u"active");
}));
}
bool IsTabActivated() {
if (MaybeCreateAudioChannelAgent()) {
return !mAudioChannelAgent->ShouldBlockMedia();
}
return false;
}
bool IsSuspended() const {
return (mSuspended == nsISuspendedTypes::SUSPENDED_PAUSE ||
mSuspended == nsISuspendedTypes::SUSPENDED_PAUSE_DISPOSABLE ||
mSuspended == nsISuspendedTypes::SUSPENDED_BLOCK);
}
AudibleState IsOwnerAudible() const {
// Muted or the volume should not be ~0
if (mOwner->mMuted || (std::fabs(mOwner->Volume()) <= 1e-7)) {
return mOwner->HasAudio()
? AudioChannelService::AudibleState::eMaybeAudible
: AudioChannelService::AudibleState::eNotAudible;
}
// No audio track.
if (!mOwner->HasAudio()) {
return AudioChannelService::AudibleState::eNotAudible;
}
// Might be audible but not yet.
if (mOwner->HasAudio() && !mOwner->mIsAudioTrackAudible) {
return AudioChannelService::AudibleState::eMaybeAudible;
}
// Suspended or paused media doesn't produce any sound.
if (mSuspended != nsISuspendedTypes::NONE_SUSPENDED || mOwner->mPaused) {
return AudioChannelService::AudibleState::eNotAudible;
}
return AudioChannelService::AudibleState::eAudible;
}
bool IsPlayingThroughTheAudioChannel() const {
// If we have an error, we are not playing.
if (mOwner->GetError()) {
return false;
}
// We should consider any bfcached page or inactive document as non-playing.
if (!mOwner->IsActive()) {
return false;
}
// It might be resumed from remote, we should keep the audio channel agent.
if (IsSuspended()) {
return true;
}
// Are we paused
if (mOwner->mPaused) {
return false;
}
// No audio track
if (!mOwner->HasAudio()) {
return false;
}
// A loop always is playing
if (mOwner->HasAttr(kNameSpaceID_None, nsGkAtoms::loop)) {
return true;
}
// If we are actually playing...
if (mOwner->IsCurrentlyPlaying()) {
return true;
}
// If we are playing an external stream.
if (mOwner->mSrcAttrStream) {
return true;
}
return false;
}
RefPtr<AudioChannelAgent> mAudioChannelAgent;
HTMLMediaElement* mOwner;
// The audio channel volume
float mAudioChannelVolume;
// Is this media element playing?
bool mPlayingThroughTheAudioChannel;
// True if the sound is being captured by the window.
bool mAudioCapturedByWindow;
// We have different kinds of suspended cases,
// - SUSPENDED_PAUSE
// It's used when we temporary lost platform audio focus. MediaElement can
// only be resumed when we gain the audio focus again.
// - SUSPENDED_PAUSE_DISPOSABLE
// It's used when user press the pause button on the remote media-control.
// MediaElement can be resumed by remote media-control or via play().
// - SUSPENDED_BLOCK
// It's used to reduce the power consumption, 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.
// - SUSPENDED_STOP_DISPOSABLE
// When we permanently lost platform audio focus, we should stop playing
// and stop the audio channel agent. MediaElement can only be restarted by
// play().
SuspendTypes mSuspended;
// Indicate whether media element is audible for users.
AudibleState mIsOwnerAudible;
bool mIsShutDown;
};
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLMediaElement::AudioChannelAgentCallback)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(
HTMLMediaElement::AudioChannelAgentCallback)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAudioChannelAgent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(
HTMLMediaElement::AudioChannelAgentCallback)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAudioChannelAgent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(
HTMLMediaElement::AudioChannelAgentCallback)
NS_INTERFACE_MAP_ENTRY(nsIAudioChannelAgentCallback)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(HTMLMediaElement::AudioChannelAgentCallback)
NS_IMPL_CYCLE_COLLECTING_RELEASE(HTMLMediaElement::AudioChannelAgentCallback)
class HTMLMediaElement::ChannelLoader final {
public:
NS_INLINE_DECL_REFCOUNTING(ChannelLoader);
void LoadInternal(HTMLMediaElement* aElement) {
if (mCancelled) {
return;
}
// determine what security checks need to be performed in AsyncOpen().
nsSecurityFlags securityFlags =
aElement->ShouldCheckAllowOrigin()
? nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS
: nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS;
if (aElement->GetCORSMode() == CORS_USE_CREDENTIALS) {
securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
}
MOZ_ASSERT(
aElement->IsAnyOfHTMLElements(nsGkAtoms::audio, nsGkAtoms::video));
nsContentPolicyType contentPolicyType =
aElement->IsHTMLElement(nsGkAtoms::audio)
? nsIContentPolicy::TYPE_INTERNAL_AUDIO
: nsIContentPolicy::TYPE_INTERNAL_VIDEO;
// If aElement has 'triggeringprincipal' attribute, we will use the value as
// triggeringPrincipal for the channel, otherwise it will default to use
// aElement->NodePrincipal().
// This function returns true when aElement has 'triggeringprincipal', so if
// setAttrs is true we will override the origin attributes on the channel
// later.
nsCOMPtr<nsIPrincipal> triggeringPrincipal;
bool setAttrs = nsContentUtils::QueryTriggeringPrincipal(
aElement, aElement->mLoadingSrcTriggeringPrincipal,
getter_AddRefs(triggeringPrincipal));
nsCOMPtr<nsILoadGroup> loadGroup = aElement->GetDocumentLoadGroup();
nsCOMPtr<nsIChannel> channel;
nsresult rv = NS_NewChannelWithTriggeringPrincipal(
getter_AddRefs(channel), aElement->mLoadingSrc,
static_cast<Element*>(aElement), triggeringPrincipal, securityFlags,
contentPolicyType,
nullptr, // aPerformanceStorage
loadGroup,
nullptr, // aCallbacks
nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE_IF_BUSY |
nsIChannel::LOAD_MEDIA_SNIFFER_OVERRIDES_CONTENT_TYPE |
nsIChannel::LOAD_CALL_CONTENT_SNIFFERS);
if (NS_FAILED(rv)) {
// Notify load error so the element will try next resource candidate.
aElement->NotifyLoadError(NS_LITERAL_CSTRING("Fail to create channel"));
return;
}
if (setAttrs) {
nsCOMPtr<nsILoadInfo> loadInfo = channel->LoadInfo();
// The function simply returns NS_OK, so we ignore the return value.
Unused << loadInfo->SetOriginAttributes(
triggeringPrincipal->OriginAttributesRef());
}
nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(channel));
if (cos) {
if (aElement->mUseUrgentStartForChannel) {
cos->AddClassFlags(nsIClassOfService::UrgentStart);
// Reset the flag to avoid loading again without initiated by user
// interaction.
aElement->mUseUrgentStartForChannel = false;
}
// Unconditionally disable throttling since we want the media to fluently
// play even when we switch the tab to background.
cos->AddClassFlags(nsIClassOfService::DontThrottle);
}
// The listener holds a strong reference to us. This creates a
// reference cycle, once we've set mChannel, which is manually broken
// in the listener's OnStartRequest method after it is finished with
// the element. The cycle will also be broken if we get a shutdown
// notification before OnStartRequest fires. Necko guarantees that
// OnStartRequest will eventually fire if we don't shut down first.
RefPtr<MediaLoadListener> loadListener = new MediaLoadListener(aElement);
channel->SetNotificationCallbacks(loadListener);
nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(channel);
if (hc) {
// Use a byte range request from the start of the resource.
// This enables us to detect if the stream supports byte range
// requests, and therefore seeking, early.
rv = hc->SetRequestHeader(NS_LITERAL_CSTRING("Range"),
NS_LITERAL_CSTRING("bytes=0-"), false);
MOZ_ASSERT(NS_SUCCEEDED(rv));
aElement->SetRequestHeaders(hc);
}
rv = channel->AsyncOpen(loadListener);
if (NS_FAILED(rv)) {
// Notify load error so the element will try next resource candidate.
aElement->NotifyLoadError(NS_LITERAL_CSTRING("Failed to open channel"));
return;
}
// Else the channel must be open and starting to download. If it encounters
// a non-catastrophic failure, it will set a new task to continue loading
// another candidate. It's safe to set it as mChannel now.
mChannel = channel;
// loadListener will be unregistered either on shutdown or when
// OnStartRequest for the channel we just opened fires.
nsContentUtils::RegisterShutdownObserver(loadListener);
}
nsresult Load(HTMLMediaElement* aElement) {
MOZ_ASSERT(aElement);
// Per bug 1235183 comment 8, we can't spin the event loop from stable
// state. Defer NS_NewChannel() to a new regular runnable.
return aElement->MainThreadEventTarget()->Dispatch(
NewRunnableMethod<HTMLMediaElement*>("ChannelLoader::LoadInternal",
this, &ChannelLoader::LoadInternal,
aElement));
}
void Cancel() {
mCancelled = true;
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
mChannel = nullptr;
}
}
void Done() {
MOZ_ASSERT(mChannel);
// Decoder successfully created, the decoder now owns the MediaResource
// which owns the channel.
mChannel = nullptr;
}
nsresult Redirect(nsIChannel* aChannel, nsIChannel* aNewChannel,
uint32_t aFlags) {
NS_ASSERTION(aChannel == mChannel, "Channels should match!");
mChannel = aNewChannel;
// Handle forwarding of Range header so that the intial detection
// of seeking support (via result code 206) works across redirects.
nsCOMPtr<nsIHttpChannel> http = do_QueryInterface(aChannel);
NS_ENSURE_STATE(http);
NS_NAMED_LITERAL_CSTRING(rangeHdr, "Range");
nsAutoCString rangeVal;
if (NS_SUCCEEDED(http->GetRequestHeader(rangeHdr, rangeVal))) {
NS_ENSURE_STATE(!rangeVal.IsEmpty());
http = do_QueryInterface(aNewChannel);
NS_ENSURE_STATE(http);
nsresult rv = http->SetRequestHeader(rangeHdr, rangeVal, false);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
private:
~ChannelLoader() { MOZ_ASSERT(!mChannel); }
// Holds a reference to the first channel we open to the media resource.
// Once the decoder is created, control over the channel passes to the
// decoder, and we null out this reference. We must store this in case
// we need to cancel the channel before control of it passes to the decoder.
nsCOMPtr<nsIChannel> mChannel;
bool mCancelled = false;
};
class HTMLMediaElement::ErrorSink {
public:
explicit ErrorSink(HTMLMediaElement* aOwner) : mOwner(aOwner) {
MOZ_ASSERT(mOwner);
}
void SetError(uint16_t aErrorCode, const nsACString& aErrorDetails) {
// Since we have multiple paths calling into DecodeError, e.g.
// MediaKeys::Terminated and EMEH264Decoder::Error. We should take the 1st
// one only in order not to fire multiple 'error' events.
if (mError) {
return;
}
if (!IsValidErrorCode(aErrorCode)) {
NS_ASSERTION(false, "Undefined MediaError codes!");
return;
}
mError = new MediaError(mOwner, aErrorCode, aErrorDetails);
mOwner->DispatchAsyncEvent(NS_LITERAL_STRING("error"));
if (mOwner->ReadyState() == HAVE_NOTHING &&
aErrorCode == MEDIA_ERR_ABORTED) {
// https://html.spec.whatwg.org/multipage/embedded-content.html#media-data-processing-steps-list
// "If the media data fetching process is aborted by the user"
mOwner->DispatchAsyncEvent(NS_LITERAL_STRING("abort"));
mOwner->ChangeNetworkState(NETWORK_EMPTY);
mOwner->DispatchAsyncEvent(NS_LITERAL_STRING("emptied"));
if (mOwner->mDecoder) {
mOwner->ShutdownDecoder();
}
} else if (aErrorCode == MEDIA_ERR_SRC_NOT_SUPPORTED) {
mOwner->ChangeNetworkState(NETWORK_NO_SOURCE);
} else {
mOwner->ChangeNetworkState(NETWORK_IDLE);
}
}
void ResetError() { mError = nullptr; }
RefPtr<MediaError> mError;
private:
bool IsValidErrorCode(const uint16_t& aErrorCode) const {
return (aErrorCode == MEDIA_ERR_DECODE || aErrorCode == MEDIA_ERR_NETWORK ||
aErrorCode == MEDIA_ERR_ABORTED ||
aErrorCode == MEDIA_ERR_SRC_NOT_SUPPORTED);
}
// Media elememt's life cycle would be longer than error sink, so we use the
// raw pointer and this class would only be referenced by media element.
HTMLMediaElement* mOwner;
};
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLMediaElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(HTMLMediaElement,
nsGenericHTMLElement)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaSource)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSrcMediaSource)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSrcStream)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSrcAttrStream)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSourcePointer)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoadBlockedDoc)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSourceLoadCandidate)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAudioChannelWrapper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mErrorSink->mError)
for (uint32_t i = 0; i < tmp->mOutputStreams.Length(); ++i) {
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOutputStreams[i].mStream)
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPlayed);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mTextTrackManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAudioTrackList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVideoTrackList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaKeys)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mIncomingMediaKeys)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSelectedVideoStreamTrack)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPendingPlayPromises)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSeekDOMPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSetMediaKeysDOMPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(HTMLMediaElement,
nsGenericHTMLElement)
tmp->RemoveMutationObserver(tmp);
if (tmp->mSrcStream) {
// Need to EndMediaStreamPlayback to clear mSrcStream and make sure
// everything gets unhooked correctly.
tmp->EndSrcMediaStreamPlayback();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSrcAttrStream)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mMediaSource)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSrcMediaSource)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSourcePointer)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoadBlockedDoc)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSourceLoadCandidate)
if (tmp->mAudioChannelWrapper) {
tmp->mAudioChannelWrapper->Shutdown();
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAudioChannelWrapper)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mErrorSink->mError)
for (OutputMediaStream& s : tmp->mOutputStreams) {
s.mStream->SetFinishedOnInactive(true);
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mOutputStreams)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPlayed)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mTextTrackManager)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAudioTrackList)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mVideoTrackList)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mMediaKeys)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mIncomingMediaKeys)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSelectedVideoStreamTrack)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPendingPlayPromises)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSeekDOMPromise)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSetMediaKeysDOMPromise)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(HTMLMediaElement,
nsGenericHTMLElement)
void HTMLMediaElement::ContentRemoved(nsIContent* aChild,
nsIContent* aPreviousSibling) {
if (aChild == mSourcePointer) {
mSourcePointer = aPreviousSibling;
}
}
already_AddRefed<MediaSource> HTMLMediaElement::GetMozMediaSourceObject()
const {
RefPtr<MediaSource> source = mMediaSource;
return source.forget();
}
already_AddRefed<Promise> HTMLMediaElement::MozRequestDebugInfo(
ErrorResult& aRv) {
RefPtr<Promise> promise = CreateDOMPromise(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
auto result = MakeUnique<dom::HTMLMediaElementDebugInfo>();
if (mMediaKeys) {
GetEMEInfo(result->mEMEInfo);
}
if (mVideoFrameContainer) {
result->mCompositorDroppedFrames =
mVideoFrameContainer->GetDroppedImageCount();
}
if (mDecoder) {
mDecoder->RequestDebugInfo(result->mDecoder)
->Then(
mAbstractMainThread, __func__,
[promise, ptr = std::move(result)]() {
promise->MaybeResolve(ptr.get());
},
[]() { UNREACHABLE(); });
} else {
promise->MaybeResolve(result.get());
}
return promise.forget();
}
/* static */
void HTMLMediaElement::MozEnableDebugLog(const GlobalObject&) {
DecoderDoctorLogger::EnableLogging();
}
already_AddRefed<Promise> HTMLMediaElement::MozRequestDebugLog(
ErrorResult& aRv) {
RefPtr<Promise> promise = CreateDOMPromise(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
DecoderDoctorLogger::RetrieveMessages(this)->Then(
mAbstractMainThread, __func__,
[promise](const nsACString& aString) {
promise->MaybeResolve(NS_ConvertUTF8toUTF16(aString));
},
[promise](nsresult rv) { promise->MaybeReject(rv); });
return promise.forget();
}
void HTMLMediaElement::SetVisible(bool aVisible) {
mForcedHidden = !aVisible;
if (mDecoder) {
mDecoder->SetForcedHidden(!aVisible);
}
}
bool HTMLMediaElement::IsVideoDecodingSuspended() const {
return mDecoder && mDecoder->IsVideoDecodingSuspended();
}
bool HTMLMediaElement::IsVisible() const {
return mVisibilityState == Visibility::ApproximatelyVisible;
}
already_AddRefed<layers::Image> HTMLMediaElement::GetCurrentImage() {
MarkAsTainted();
// TODO: In bug 1345404, handle case when video decoder is already suspended.
ImageContainer* container = GetImageContainer();
if (!container) {
return nullptr;
}
AutoLockImage lockImage(container);
RefPtr<layers::Image> image = lockImage.GetImage(TimeStamp::Now());
return image.forget();
}
bool HTMLMediaElement::HasSuspendTaint() const {
MOZ_ASSERT(!mDecoder || (mDecoder->HasSuspendTaint() == mHasSuspendTaint));
return mHasSuspendTaint;
}
already_AddRefed<DOMMediaStream> HTMLMediaElement::GetSrcObject() const {
NS_ASSERTION(!mSrcAttrStream || mSrcAttrStream->GetPlaybackStream(),
"MediaStream should have been set up properly");
RefPtr<DOMMediaStream> stream = mSrcAttrStream;
return stream.forget();
}
void HTMLMediaElement::SetSrcObject(DOMMediaStream& aValue) {
SetSrcObject(&aValue);
}
void HTMLMediaElement::SetSrcObject(DOMMediaStream* aValue) {
mSrcAttrStream = aValue;
UpdateAudioChannelPlayingState();
DoLoad();
}
bool HTMLMediaElement::Ended() {
return (mDecoder && mDecoder->IsEnded()) ||
(mSrcStream && mSrcStreamPlaybackEnded);
}
void HTMLMediaElement::GetCurrentSrc(nsAString& aCurrentSrc) {
nsAutoCString src;
GetCurrentSpec(src);
CopyUTF8toUTF16(src, aCurrentSrc);
}
nsresult HTMLMediaElement::OnChannelRedirect(nsIChannel* aChannel,
nsIChannel* aNewChannel,
uint32_t aFlags) {
MOZ_ASSERT(mChannelLoader);
return mChannelLoader->Redirect(aChannel, aNewChannel, aFlags);
}
void HTMLMediaElement::ShutdownDecoder() {
RemoveMediaElementFromURITable();
NS_ASSERTION(mDecoder, "Must have decoder to shut down");
mWaitingForKeyListener.DisconnectIfExists();
if (mMediaSource) {
mMediaSource->CompletePendingTransactions();
}
if (!mOutputStreams.IsEmpty()) {
mNextAvailableMediaDecoderOutputTrackID =
mDecoder->GetNextOutputStreamTrackID();
}
DiscardFinishWhenEndedOutputStreams();
mDecoder->Shutdown();
DDUNLINKCHILD(mDecoder.get());
mDecoder = nullptr;
ReportAudioTrackSilenceProportionTelemetry();
}
void HTMLMediaElement::ReportPlayedTimeAfterBlockedTelemetry() {
if (!mHasPlayEverBeenBlocked) {
return;
}
mHasPlayEverBeenBlocked = false;
const double playTimeThreshold = 7.0;
const double playTimeAfterBlocked = mCurrentLoadPlayTime.Total();
if (playTimeAfterBlocked <= 0.0) {
return;
}
const bool isDurationLessThanTimeThresholdAndMediaPlayedToTheEnd =
Duration() < playTimeThreshold && Ended();
LOG(LogLevel::Debug, ("%p PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED=%f, isVideo=%d",
this, playTimeAfterBlocked, IsVideo()));
if (IsVideo() && playTimeAfterBlocked >= playTimeThreshold) {
AccumulateCategorical(
mozilla::Telemetry::LABELS_MEDIA_PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED::
VPlayedMoreThan7s);
} else if (IsVideo() && playTimeAfterBlocked < playTimeThreshold) {
if (isDurationLessThanTimeThresholdAndMediaPlayedToTheEnd) {
AccumulateCategorical(
mozilla::Telemetry::LABELS_MEDIA_PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED::
VPlayedToTheEnd);
} else {
AccumulateCategorical(
mozilla::Telemetry::LABELS_MEDIA_PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED::
VPlayedLessThan7s);
}
} else if (!IsVideo() && playTimeAfterBlocked >= playTimeThreshold) {
AccumulateCategorical(
mozilla::Telemetry::LABELS_MEDIA_PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED::
APlayedMoreThan7s);
} else if (!IsVideo() && playTimeAfterBlocked < playTimeThreshold) {
if (isDurationLessThanTimeThresholdAndMediaPlayedToTheEnd) {
AccumulateCategorical(
mozilla::Telemetry::LABELS_MEDIA_PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED::
APlayedToTheEnd);
} else {
AccumulateCategorical(
mozilla::Telemetry::LABELS_MEDIA_PLAYED_TIME_AFTER_AUTOPLAY_BLOCKED::
APlayedLessThan7s);
}
}
}
void HTMLMediaElement::AbortExistingLoads() {
// Abort any already-running instance of the resource selection algorithm.
mLoadWaitStatus = NOT_WAITING;
// Set a new load ID. This will cause events which were enqueued
// with a different load ID to silently be cancelled.
mCurrentLoadID++;
// Immediately reject or resolve the already-dispatched
// nsResolveOrRejectPendingPlayPromisesRunners. These runners won't be
// executed again later since the mCurrentLoadID had been changed.
for (auto& runner : mPendingPlayPromisesRunners) {
runner->ResolveOrReject();
}
mPendingPlayPromisesRunners.Clear();
if (mChannelLoader) {
mChannelLoader->Cancel();
mChannelLoader = nullptr;
}
bool fireTimeUpdate = false;
// We need to remove FirstFrameListener before VideoTracks get emptied.
if (mFirstFrameListener) {
mSelectedVideoStreamTrack->RemoveVideoOutput(mFirstFrameListener);
mFirstFrameListener = nullptr;
}
// When aborting the existing loads, empty the objects in audio track list and
// video track list, no events (in particular, no removetrack events) are
// fired as part of this. Ending MediaStream sends track ended notifications,
// so we empty the track lists prior.
if (AudioTracks()) {
AudioTracks()->EmptyTracks();
}
if (VideoTracks()) {
VideoTracks()->EmptyTracks();
}
if (mDecoder) {
fireTimeUpdate = mDecoder->GetCurrentTime() != 0.0;
ShutdownDecoder();
}
if (mSrcStream) {
EndSrcMediaStreamPlayback();
}
DiscardFinishWhenEndedOutputStreams();
RemoveMediaElementFromURITable();
mLoadingSrc = nullptr;
mLoadingSrcTriggeringPrincipal = nullptr;
DDLOG(DDLogCategory::Property, "loading_src", "");
DDUNLINKCHILD(mMediaSource.get());
mMediaSource = nullptr;
if (mNetworkState == NETWORK_LOADING || mNetworkState == NETWORK_IDLE) {
DispatchAsyncEvent(NS_LITERAL_STRING("abort"));
}
bool hadVideo = HasVideo();
mErrorSink->ResetError();
mCurrentPlayRangeStart = -1.0;
mLoadedDataFired = false;
mAutoplaying = true;
mIsLoadingFromSourceChildren = false;
mSuspendedAfterFirstFrame = false;
mAllowSuspendAfterFirstFrame = true;
mHaveQueuedSelectResource = false;
mSuspendedForPreloadNone = false;
mDownloadSuspendedByCache = false;
mMediaInfo = MediaInfo();
mIsEncrypted = false;
mPendingEncryptedInitData.Reset();
mWaitingForKey = NOT_WAITING_FOR_KEY;
mSourcePointer = nullptr;
mBlockedAsWithoutMetadata = false;
mTags = nullptr;
mAudioTrackSilenceStartedTime = 0.0;
if (mNetworkState != NETWORK_EMPTY) {
NS_ASSERTION(!mDecoder && !mSrcStream,
"How did someone setup a new stream/decoder already?");
// ChangeNetworkState() will call UpdateAudioChannelPlayingState()
// indirectly which depends on mPaused. So we need to update mPaused first.
if (!mPaused) {
mPaused = true;
RejectPromises(TakePendingPlayPromises(), NS_ERROR_DOM_MEDIA_ABORT_ERR);
}
ChangeNetworkState(NETWORK_EMPTY);
ChangeReadyState(HAVE_NOTHING);
// TODO: Apply the rules for text track cue rendering Bug 865407
if (mTextTrackManager) {
mTextTrackManager->GetTextTracks()->SetCuesInactive();
}
if (fireTimeUpdate) {
// Since we destroyed the decoder above, the current playback position
// will now be reported as 0. The playback position was non-zero when
// we destroyed the decoder, so fire a timeupdate event so that the
// change will be reflected in the controls.
FireTimeUpdate(false);
}
DispatchAsyncEvent(NS_LITERAL_STRING("emptied"));
UpdateAudioChannelPlayingState();
}
if (IsVideo() && hadVideo) {
// Ensure we render transparent black after resetting video resolution.
Maybe<nsIntSize> size = Some(nsIntSize(0, 0));
Invalidate(true, size, false);
}
// We may have changed mPaused, mAutoplaying, and other
// things which can affect AddRemoveSelfReference
AddRemoveSelfReference();
mIsRunningSelectResource = false;
mEventDeliveryPaused = false;
mPendingEvents.Clear();
mCurrentLoadPlayTime.Reset();
AssertReadyStateIsNothing();
}
void HTMLMediaElement::NoSupportedMediaSourceError(
const nsACString& aErrorDetails) {
if (mDecoder) {
ShutdownDecoder();
}
mErrorSink->SetError(MEDIA_ERR_SRC_NOT_SUPPORTED, aErrorDetails);
ChangeDelayLoadStatus(false);
UpdateAudioChannelPlayingState();
RejectPromises(TakePendingPlayPromises(),
NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR);
}
typedef void (HTMLMediaElement::*SyncSectionFn)();
// Runs a "synchronous section", a function that must run once the event loop
// has reached a "stable state". See:
// http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#synchronous-section
class nsSyncSection : public nsMediaEvent {
private:
nsCOMPtr<nsIRunnable> mRunnable;
public:
nsSyncSection(HTMLMediaElement* aElement, nsIRunnable* aRunnable)
: nsMediaEvent("dom::nsSyncSection", aElement), mRunnable(aRunnable) {}
NS_IMETHOD Run() override {
// Silently cancel if our load has been cancelled.
if (IsCancelled()) return NS_OK;
mRunnable->Run();
return NS_OK;
}
};
void HTMLMediaElement::RunInStableState(nsIRunnable* aRunnable) {
if (mShuttingDown) {
return;
}
nsCOMPtr<nsIRunnable> event = new nsSyncSection(this, aRunnable);
nsContentUtils::RunInStableState(event.forget());
}
void HTMLMediaElement::QueueLoadFromSourceTask() {
if (!mIsLoadingFromSourceChildren || mShuttingDown) {
return;
}
if (mDecoder) {
// Reset readyState to HAVE_NOTHING since we're going to load a new decoder.
ShutdownDecoder();
ChangeReadyState(HAVE_NOTHING);
}
AssertReadyStateIsNothing();
ChangeDelayLoadStatus(true);
ChangeNetworkState(NETWORK_LOADING);
RefPtr<Runnable> r =
NewRunnableMethod("HTMLMediaElement::LoadFromSourceChildren", this,
&HTMLMediaElement::LoadFromSourceChildren);
RunInStableState(r);
}
void HTMLMediaElement::QueueSelectResourceTask() {
// Don't allow multiple async select resource calls to be queued.
if (mHaveQueuedSelectResource) return;
mHaveQueuedSelectResource = true;
ChangeNetworkState(NETWORK_NO_SOURCE);
RefPtr<Runnable> r =
NewRunnableMethod("HTMLMediaElement::SelectResourceWrapper", this,
&HTMLMediaElement::SelectResourceWrapper);
RunInStableState(r);
}
static bool HasSourceChildren(nsIContent* aElement) {
for (nsIContent* child = aElement->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsHTMLElement(nsGkAtoms::source)) {
return true;
}
}
return false;
}
static nsCString DocumentOrigin(Document* aDoc) {
if (!aDoc) {
return NS_LITERAL_CSTRING("null");
}
nsCOMPtr<nsIPrincipal> principal = aDoc->NodePrincipal();
if (!principal) {
return NS_LITERAL_CSTRING("null");
}
nsCString origin;
if (NS_FAILED(principal->GetOrigin(origin))) {
return NS_LITERAL_CSTRING("null");
}
return origin;
}
void HTMLMediaElement::Load() {
LOG(LogLevel::Debug,
("%p Load() hasSrcAttrStream=%d hasSrcAttr=%d hasSourceChildren=%d "
"handlingInput=%d hasAutoplayAttr=%d IsAllowedToPlay=%d "
"ownerDoc=%p (%s) ownerDocUserActivated=%d "
"muted=%d volume=%f",
this, !!mSrcAttrStream, HasAttr(kNameSpaceID_None, nsGkAtoms::src),
HasSourceChildren(this), EventStateManager::IsHandlingUserInput(),
HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay),
AutoplayPolicy::IsAllowedToPlay(*this), OwnerDoc(),
DocumentOrigin(OwnerDoc()).get(),
OwnerDoc() ? OwnerDoc()->HasBeenUserGestureActivated() : 0, mMuted,
mVolume));
if (mIsRunningLoadMethod) {
return;
}
mIsDoingExplicitLoad = true;
DoLoad();
}
void HTMLMediaElement::DoLoad() {
// Check if media is allowed for the docshell.
nsCOMPtr<nsIDocShell> docShell = OwnerDoc()->GetDocShell();
if (docShell && !docShell->GetAllowMedia()) {
LOG(LogLevel::Debug, ("%p Media not allowed", this));
return;
}
if (mIsRunningLoadMethod) {
return;
}
if (EventStateManager::IsHandlingUserInput()) {
// Detect if user has interacted with element so that play will not be
// blocked when initiated by a script. This enables sites to capture user
// intent to play by calling load() in the click handler of a "catalog
// view" of a gallery of videos.
mIsBlessed = true;
// Mark the channel as urgent-start when autopaly so that it will play the
// media from src after loading enough resource.
if (HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay)) {
mUseUrgentStartForChannel = true;
}
}
SetPlayedOrSeeked(false);
mIsRunningLoadMethod = true;
AbortExistingLoads();
SetPlaybackRate(mDefaultPlaybackRate, IgnoreErrors());
QueueSelectResourceTask();
ResetState();
mIsRunningLoadMethod = false;
}
void HTMLMediaElement::ResetState() {
// There might be a pending MediaDecoder::PlaybackPositionChanged() which
// will overwrite |mMediaInfo.mVideo.mDisplay| in UpdateMediaSize() to give
// staled videoWidth and videoHeight. We have to call ForgetElement() here
// such that the staled callbacks won't reach us.
if (mVideoFrameContainer) {
mVideoFrameContainer->ForgetElement();
mVideoFrameContainer = nullptr;
}
}
void HTMLMediaElement::SelectResourceWrapper() {
SelectResource();
MaybeBeginCloningVisually();
mIsRunningSelectResource = false;
mHaveQueuedSelectResource = false;
mIsDoingExplicitLoad = false;
}
void HTMLMediaElement::SelectResource() {
if (!mSrcAttrStream && !HasAttr(kNameSpaceID_None, nsGkAtoms::src) &&
!HasSourceChildren(this)) {
// The media element has neither a src attribute nor any source
// element children, abort the load.
ChangeNetworkState(NETWORK_EMPTY);
ChangeDelayLoadStatus(false);
return;
}
ChangeDelayLoadStatus(true);
ChangeNetworkState(NETWORK_LOADING);
DispatchAsyncEvent(NS_LITERAL_STRING("loadstart"));
// Delay setting mIsRunningSeletResource until after UpdatePreloadAction
// so that we don't lose our state change by bailing out of the preload
// state update
UpdatePreloadAction();
mIsRunningSelectResource = true;
// If we have a 'src' attribute, use that exclusively.
nsAutoString src;
if (mSrcAttrStream) {
SetupSrcMediaStreamPlayback(mSrcAttrStream);
} else if (GetAttr(kNameSpaceID_None, nsGkAtoms::src, src)) {
nsCOMPtr<nsIURI> uri;
MediaResult rv = NewURIFromString(src, getter_AddRefs(uri));
if (NS_SUCCEEDED(rv)) {
LOG(LogLevel::Debug, ("%p Trying load from src=%s", this,
NS_ConvertUTF16toUTF8(src).get()));
NS_ASSERTION(
!mIsLoadingFromSourceChildren,
"Should think we're not loading from source children by default");
RemoveMediaElementFromURITable();
mLoadingSrc = uri;
mLoadingSrcTriggeringPrincipal = mSrcAttrTriggeringPrincipal;
DDLOG(DDLogCategory::Property, "loading_src",
nsCString(NS_ConvertUTF16toUTF8(src)));
mMediaSource = mSrcMediaSource;
DDLINKCHILD("mediasource", mMediaSource.get());
UpdatePreloadAction();
if (mPreloadAction == HTMLMediaElement::PRELOAD_NONE && !mMediaSource) {
// preload:none media, suspend the load here before we make any
// network requests.
SuspendLoad();
return;
}
rv = LoadResource();
if (NS_SUCCEEDED(rv)) {
return;
}
} else {
AutoTArray<nsString, 1> params = {src};
ReportLoadError("MediaLoadInvalidURI", params);
rv = MediaResult(rv.Code(), "MediaLoadInvalidURI");
}
// The media element has neither a src attribute nor a source element child:
// set the networkState to NETWORK_EMPTY, and abort these steps; the
// synchronous section ends.
mMainThreadEventTarget->Dispatch(NewRunnableMethod<nsCString>(
"HTMLMediaElement::NoSupportedMediaSourceError", this,
&HTMLMediaElement::NoSupportedMediaSourceError, rv.Description()));
} else {
// Otherwise, the source elements will be used.
mIsLoadingFromSourceChildren = true;
LoadFromSourceChildren();
}
}
void HTMLMediaElement::NotifyLoadError(const nsACString& aErrorDetails) {
if (!mIsLoadingFromSourceChildren) {
LOG(LogLevel::Debug, ("NotifyLoadError(), no supported media error"));
NoSupportedMediaSourceError(aErrorDetails);
} else if (mSourceLoadCandidate) {
DispatchAsyncSourceError(mSourceLoadCandidate);
QueueLoadFromSourceTask();
} else {
NS_WARNING("Should know the source we were loading from!");
}
}
void HTMLMediaElement::NotifyMediaTrackEnabled(MediaTrack* aTrack) {
MOZ_ASSERT(aTrack);
if (!aTrack) {
return;
}
#ifdef DEBUG
nsString id;
aTrack->GetId(id);
LOG(LogLevel::Debug, ("MediaElement %p %sTrack with id %s enabled", this,
aTrack->AsAudioTrack() ? "Audio" : "Video",
NS_ConvertUTF16toUTF8(id).get()));
#endif
MOZ_ASSERT((aTrack->AsAudioTrack() && aTrack->AsAudioTrack()->Enabled()) ||
(aTrack->AsVideoTrack() && aTrack->AsVideoTrack()->Selected()));
if (aTrack->AsAudioTrack()) {
SetMutedInternal(mMuted & ~MUTED_BY_AUDIO_TRACK);
} else if (aTrack->AsVideoTrack()) {
if (!IsVideo()) {
MOZ_ASSERT(false);
return;
}
mDisableVideo = false;
} else {
MOZ_ASSERT(false, "Unknown track type");
}
if (mSrcStream) {
if (aTrack->AsVideoTrack()) {
MOZ_ASSERT(!mSelectedVideoStreamTrack);
mSelectedVideoStreamTrack = aTrack->AsVideoTrack()->GetVideoStreamTrack();
VideoFrameContainer* container = GetVideoFrameContainer();
if (container) {
HTMLVideoElement* self = static_cast<HTMLVideoElement*>(this);
if (mSrcStreamIsPlaying) {
mSelectedVideoStreamTrack->AddVideoOutput(container);
MaybeBeginCloningVisually();
} else if (self->VideoWidth() <= 1 && self->VideoHeight() <= 1) {
// MediaInfo uses dummy values of 1 for width and height to
// mark video as valid. We need a new first-frame listener
// if size is 0x0 or 1x1.
if (!mFirstFrameListener) {
mFirstFrameListener =
new FirstFrameListener(container, mAbstractMainThread);
}
mSelectedVideoStreamTrack->AddVideoOutput(mFirstFrameListener);
}
}
}
if (mReadyState == HAVE_NOTHING) {
// No MediaStreamTracks are captured until we have metadata.
return;
}
for (OutputMediaStream& ms : mOutputStreams) {
if (aTrack->AsVideoTrack() && ms.mCapturingAudioOnly) {
// If the output stream is for audio only we ignore video tracks.
continue;
}
AddCaptureMediaTrackToOutputStream(aTrack, ms);
}
}
}
void HTMLMediaElement::NotifyMediaTrackDisabled(MediaTrack* aTrack) {
MOZ_ASSERT(aTrack);
if (!aTrack) {
return;
}
#ifdef DEBUG
nsString id;
aTrack->GetId(id);
LOG(LogLevel::Debug, ("MediaElement %p %sTrack with id %s disabled", this,
aTrack->AsAudioTrack() ? "Audio" : "Video",
NS_ConvertUTF16toUTF8(id).get()));
#endif
MOZ_ASSERT((!aTrack->AsAudioTrack() || !aTrack->AsAudioTrack()->Enabled()) &&
(!aTrack->AsVideoTrack() || !aTrack->AsVideoTrack()->Selected()));
if (aTrack->AsAudioTrack()) {
// If we don't have any alive track , we don't need to mute MediaElement.
MOZ_DIAGNOSTIC_ASSERT(AudioTracks(), "Element can't have been unlinked");
if (AudioTracks()->Length() > 0) {
bool shouldMute = true;
for (uint32_t i = 0; i < AudioTracks()->Length(); ++i) {
if ((*AudioTracks())[i]->Enabled()) {
shouldMute = false;
break;
}
}
if (shouldMute) {
SetMutedInternal(mMuted | MUTED_BY_AUDIO_TRACK);
}
}
} else if (aTrack->AsVideoTrack()) {
if (mSrcStream) {
if (mFirstFrameListener) {
mSelectedVideoStreamTrack->RemoveVideoOutput(mFirstFrameListener);
mFirstFrameListener = nullptr;
}
VideoFrameContainer* container = GetVideoFrameContainer();
if (mSrcStreamIsPlaying && container) {
mSelectedVideoStreamTrack->RemoveVideoOutput(container);
}
mSelectedVideoStreamTrack = nullptr;
}
}
if (mReadyState == HAVE_NOTHING) {
// No MediaStreamTracks are captured until we have metadata, and code
// below doesn't do anything for captured decoders.
return;
}
for (OutputMediaStream& ms : mOutputStreams) {
if (ms.mCapturingDecoder) {
MOZ_ASSERT(!ms.mCapturingMediaStream);
continue;
}
if (ms.mCapturingAudioOnly && aTrack->AsVideoTrack()) {
continue;
}
MOZ_ASSERT(ms.mCapturingMediaStream);
for (int32_t i = ms.mTrackPorts.Length() - 1; i >= 0; --i) {
if (ms.mTrackPorts[i].first() == aTrack->GetId()) {
// The source of this track just ended. Force-notify that it ended.
// If we bounce it to the MediaStreamGraph it might not be picked up,
// for instance if the MediaInputPort was destroyed in the same
// iteration as it was added.
MediaStreamTrack* outputTrack = ms.mStream->FindOwnedDOMTrack(
ms.mTrackPorts[i].second()->GetDestination(),
ms.mTrackPorts[i].second()->GetDestinationTrackId());
MOZ_ASSERT(outputTrack);
if (outputTrack) {
mMainThreadEventTarget->Dispatch(
NewRunnableMethod("MediaStreamTrack::OverrideEnded", outputTrack,
&MediaStreamTrack::OverrideEnded));
}
ms.mTrackPorts[i].second()->Destroy();
ms.mTrackPorts.RemoveElementAt(i);
break;
}
}
#ifdef DEBUG
for (auto pair : ms.mTrackPorts) {
MOZ_ASSERT(pair.first() != aTrack->GetId(),
"The same MediaTrack was forwarded to the output stream more "
"than once. This shouldn't happen.");
}
#endif
}
}
void HTMLMediaElement::DealWithFailedElement(nsIContent* aSourceElement) {
if (mShuttingDown) {
return;
}
DispatchAsyncSourceError(aSourceElement);
mMainThreadEventTarget->Dispatch(
NewRunnableMethod("HTMLMediaElement::QueueLoadFromSourceTask", this,
&HTMLMediaElement::QueueLoadFromSourceTask));
}
void HTMLMediaElement::NotifyOutputTrackStopped(DOMMediaStream* aOwningStream,
TrackID aDestinationTrackID) {
for (OutputMediaStream& ms : mOutputStreams) {
if (!ms.mCapturingMediaStream) {
continue;
}
if (ms.mStream != aOwningStream) {
continue;
}
for (int32_t i = ms.mTrackPorts.Length() - 1; i >= 0; --i) {
MediaInputPort* port = ms.mTrackPorts[i].second();
if (port->GetDestinationTrackId() != aDestinationTrackID) {
continue;
}
port->Destroy();
ms.mTrackPorts.RemoveElementAt(i);
return;
}
}
// An output track ended but its port is already gone.
// It was probably cleared by the removal of the source MediaTrack.
}
void HTMLMediaElement::LoadFromSourceChildren() {
NS_ASSERTION(mDelayingLoadEvent,
"Should delay load event (if in document) during load");
NS_ASSERTION(mIsLoadingFromSourceChildren,
"Must remember we're loading from source children");
AddMutationObserverUnlessExists(this);
while (true) {
Element* child = GetNextSource();
if (!child) {
// Exhausted candidates, wait for more candidates to be appended to
// the media element.
mLoadWaitStatus = WAITING_FOR_SOURCE;
ChangeNetworkState(NETWORK_NO_SOURCE);
ChangeDelayLoadStatus(false);
ReportLoadError("MediaLoadExhaustedCandidates");
return;
}
// Must have src attribute.
nsAutoString src;
if (!child->GetAttr(kNameSpaceID_None, nsGkAtoms::src, src)) {
ReportLoadError("MediaLoadSourceMissingSrc");
DealWithFailedElement(child);
return;
}
// If we have a type attribute, it must be a supported type.
nsAutoString type;
if (child->GetAttr(kNameSpaceID_None, nsGkAtoms::type, type)) {
DecoderDoctorDiagnostics diagnostics;
CanPlayStatus canPlay = GetCanPlay(type, &diagnostics);
diagnostics.StoreFormatDiagnostics(OwnerDoc(), type,
canPlay != CANPLAY_NO, __func__);
if (canPlay == CANPLAY_NO) {
AutoTArray<nsString, 2> params = {type, src};
ReportLoadError("MediaLoadUnsupportedTypeAttribute", params);
DealWithFailedElement(child);
return;
}
}
HTMLSourceElement* childSrc = HTMLSourceElement::FromNode(child);
LOG(LogLevel::Debug,
("%p Trying load from <source>=%s type=%s", this,
NS_ConvertUTF16toUTF8(src).get(), NS_ConvertUTF16toUTF8(type).get()));
nsCOMPtr<nsIURI> uri;
NewURIFromString(src, getter_AddRefs(uri));
if (!uri) {
AutoTArray<nsString, 1> params = {src};
ReportLoadError("MediaLoadInvalidURI", params);
DealWithFailedElement(child);
return;
}
RemoveMediaElementFromURITable();
mLoadingSrc = uri;
mLoadingSrcTriggeringPrincipal = childSrc->GetSrcTriggeringPrincipal();
DDLOG(DDLogCategory::Property, "loading_src",
nsCString(NS_ConvertUTF16toUTF8(src)));
mMediaSource = childSrc->GetSrcMediaSource();
DDLINKCHILD("mediasource", mMediaSource.get());
NS_ASSERTION(mNetworkState == NETWORK_LOADING,
"Network state should be loading");
if (mPreloadAction == HTMLMediaElement::PRELOAD_NONE && !mMediaSource) {
// preload:none media, suspend the load here before we make any
// network requests.
SuspendLoad();
return;
}
if (NS_SUCCEEDED(LoadResource())) {
return;
}
// If we fail to load, loop back and try loading the next resource.
DispatchAsyncSourceError(child);
}
MOZ_ASSERT_UNREACHABLE("Execution should not reach here!");
}
void HTMLMediaElement::SuspendLoad() {
mSuspendedForPreloadNone = true;
ChangeNetworkState(NETWORK_IDLE);
ChangeDelayLoadStatus(false);
}
void HTMLMediaElement::ResumeLoad(PreloadAction aAction) {
NS_ASSERTION(mSuspendedForPreloadNone,
"Must be halted for preload:none to resume from preload:none "
"suspended load.");
mSuspendedForPreloadNone = false;
mPreloadAction = aAction;
ChangeDelayLoadStatus(true);
ChangeNetworkState(NETWORK_LOADING);
if (!mIsLoadingFromSourceChildren) {
// We were loading from the element's src attribute.
MediaResult rv = LoadResource();
if (NS_FAILED(rv)) {
NoSupportedMediaSourceError(rv.Description());
}
} else {
// We were loading from a child <source> element. Try to resume the
// load of that child, and if that fails, try the next child.
if (NS_FAILED(LoadResource())) {
LoadFromSourceChildren();
}
}
}
bool HTMLMediaElement::AllowedToPlay() const {
return AutoplayPolicy::IsAllowedToPlay(*this);
}
uint32_t HTMLMediaElement::GetPreloadDefault() const {
if (mMediaSource) {
return HTMLMediaElement::PRELOAD_ATTR_METADATA;
}
if (OnCellularConnection()) {
return Preferences::GetInt("media.preload.default.cellular",
HTMLMediaElement::PRELOAD_ATTR_NONE);
}
return Preferences::GetInt("media.preload.default",
HTMLMediaElement::PRELOAD_ATTR_METADATA);
}
uint32_t HTMLMediaElement::GetPreloadDefaultAuto() const {
if (OnCellularConnection()) {
return Preferences::GetInt("media.preload.auto.cellular",
HTMLMediaElement::PRELOAD_ATTR_METADATA);
}
return Preferences::GetInt("media.preload.auto",
HTMLMediaElement::PRELOAD_ENOUGH);
}
void HTMLMediaElement::UpdatePreloadAction() {
PreloadAction nextAction = PRELOAD_UNDEFINED;
// If autoplay is set, or we're playing, we should always preload data,
// as we'll need it to play.
if ((AutoplayPolicy::IsAllowedToPlay(*this) &&
HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay)) ||
!mPaused) {
nextAction = HTMLMediaElement::PRELOAD_ENOUGH;
} else {
// Find the appropriate preload action by looking at the attribute.
const nsAttrValue* val =
mAttrs.GetAttr(nsGkAtoms::preload, kNameSpaceID_None);
// MSE doesn't work if preload is none, so it ignores the pref when src is
// from MSE.
uint32_t preloadDefault = GetPreloadDefault();
uint32_t preloadAuto = GetPreloadDefaultAuto();
if (!val) {
// Attribute is not set. Use the preload action specified by the
// media.preload.default pref, or just preload metadata if not present.
nextAction = static_cast<PreloadAction>(preloadDefault);
} else if (val->Type() == nsAttrValue::eEnum) {
PreloadAttrValue attr =
static_cast<PreloadAttrValue>(val->GetEnumValue());
if (attr == HTMLMediaElement::PRELOAD_ATTR_EMPTY ||
attr == HTMLMediaElement::PRELOAD_ATTR_AUTO) {
nextAction = static_cast<PreloadAction>(preloadAuto);
} else if (attr == HTMLMediaElement::PRELOAD_ATTR_METADATA) {
nextAction = HTMLMediaElement::PRELOAD_METADATA;
} else if (attr == HTMLMediaElement::PRELOAD_ATTR_NONE) {
nextAction = HTMLMediaElement::PRELOAD_NONE;
}
} else {
// Use the suggested "missing value default" of "metadata", or the value
// specified by the media.preload.default, if present.
nextAction = static_cast<PreloadAction>(preloadDefault);
}
}
if (nextAction == HTMLMediaElement::PRELOAD_NONE && mIsDoingExplicitLoad) {
nextAction = HTMLMediaElement::PRELOAD_METADATA;
}
mPreloadAction = nextAction;
if (nextAction == HTMLMediaElement::PRELOAD_ENOUGH) {
if (mSuspendedForPreloadNone) {
// Our load was previouly suspended due to the media having preload
// value "none". The preload value has changed to preload:auto, so
// resume the load.
ResumeLoad(PRELOAD_ENOUGH);
} else {
// Preload as much of the video as we can, i.e. don't suspend after
// the first frame.
StopSuspendingAfterFirstFrame();
}
} else if (nextAction == HTMLMediaElement::PRELOAD_METADATA) {
// Ensure that the video can be suspended after first frame.
mAllowSuspendAfterFirstFrame = true;
if (mSuspendedForPreloadNone) {
// Our load was previouly suspended due to the media having preload
// value "none". The preload value has changed to preload:metadata, so
// resume the load. We'll pause the load again after we've read the
// metadata.
ResumeLoad(PRELOAD_METADATA);
}
}
}
MediaResult HTMLMediaElement::LoadResource() {
AbstractThread::AutoEnter context(AbstractMainThread());
NS_ASSERTION(mDelayingLoadEvent,
"Should delay load event (if in document) during load");
if (mChannelLoader) {
mChannelLoader->Cancel();
mChannelLoader = nullptr;
}
// Set the media element's CORS mode only when loading a resource
mCORSMode = AttrValueToCORSMode(GetParsedAttr(nsGkAtoms::crossorigin));
HTMLMediaElement* other = LookupMediaElementURITable(mLoadingSrc);
if (other && other->mDecoder) {
// Clone it.
// TODO: remove the cast by storing ChannelMediaDecoder in the URI table.
nsresult rv = InitializeDecoderAsClone(
static_cast<ChannelMediaDecoder*>(other->mDecoder.get()));
if (NS_SUCCEEDED(rv)) return rv;
}
if (mMediaSource) {
MediaDecoderInit decoderInit(
this, mMuted ? 0.0 : mVolume, mPreservesPitch,
ClampPlaybackRate(mPlaybackRate),
mPreloadAction == HTMLMediaElement::PRELOAD_METADATA, mHasSuspendTaint,
HasAttr(kNameSpaceID_None, nsGkAtoms::loop),
MediaContainerType(MEDIAMIMETYPE("application/x.mediasource")));
RefPtr<MediaSourceDecoder> decoder = new MediaSourceDecoder(decoderInit);
if (!mMediaSource->Attach(decoder)) {
// TODO: Handle failure: run "If the media data cannot be fetched at
// all, due to network errors, causing the user agent to give up
// trying to fetch the resource" section of resource fetch algorithm.
decoder->Shutdown();
return MediaResult(NS_ERROR_FAILURE, "Failed to attach MediaSource");
}
ChangeDelayLoadStatus(false);
nsresult rv = decoder->Load(mMediaSource->GetPrincipal());
if (NS_FAILED(rv)) {
decoder->Shutdown();
LOG(LogLevel::Debug,
("%p Failed to load for decoder %p", this, decoder.get()));
return MediaResult(rv, "Fail to load decoder");
}
rv = FinishDecoderSetup(decoder);
return MediaResult(rv, "Failed to set up decoder");
}
AssertReadyStateIsNothing();
RefPtr<ChannelLoader> loader = new ChannelLoader;
nsresult rv = loader->Load(this);
if (NS_SUCCEEDED(rv)) {
mChannelLoader = loader.forget();
}
return MediaResult(rv, "Failed to load channel");
}
nsresult HTMLMediaElement::LoadWithChannel(nsIChannel* aChannel,
nsIStreamListener** aListener) {
NS_ENSURE_ARG_POINTER(aChannel);
NS_ENSURE_ARG_POINTER(aListener);
*aListener = nullptr;
// Make sure we don't reenter during synchronous abort events.
if (mIsRunningLoadMethod) return NS_OK;
mIsRunningLoadMethod = true;
AbortExistingLoads();
mIsRunningLoadMethod = false;
mLoadingSrcTriggeringPrincipal = nullptr;
nsresult rv = aChannel->GetOriginalURI(getter_AddRefs(mLoadingSrc));
NS_ENSURE_SUCCESS(rv, rv);
ChangeDelayLoadStatus(true);
rv = InitializeDecoderForChannel(aChannel, aListener);
if (NS_FAILED(rv)) {
ChangeDelayLoadStatus(false);
return rv;
}
SetPlaybackRate(mDefaultPlaybackRate, IgnoreErrors());
DispatchAsyncEvent(NS_LITERAL_STRING("loadstart"));
return NS_OK;
}
bool HTMLMediaElement::Seeking() const {
return mDecoder && mDecoder->IsSeeking();
}
double HTMLMediaElement::CurrentTime() const {
if (MediaStream* stream = GetSrcMediaStream()) {
MediaStreamGraph* graph = stream->Graph();
GraphTime currentGraphTime =
mSrcStreamPausedGraphTime.valueOr(graph->CurrentTime());
StreamTime currentStreamTime = currentGraphTime - mSrcStreamGraphTimeOffset;
return stream->StreamTimeToSeconds(currentStreamTime);
}
if (mDefaultPlaybackStartPosition == 0.0 && mDecoder) {
return mDecoder->GetCurrentTime();
}
return mDefaultPlaybackStartPosition;
}
void HTMLMediaElement::FastSeek(double aTime, ErrorResult& aRv) {
LOG(LogLevel::Debug, ("%p FastSeek(%f) called by JS", this, aTime));
LOG(LogLevel::Debug, ("Reporting telemetry VIDEO_FASTSEEK_USED"));
Telemetry::Accumulate(Telemetry::VIDEO_FASTSEEK_USED, 1);
RefPtr<Promise> tobeDropped =
Seek(aTime, SeekTarget::PrevSyncPoint, IgnoreErrors());
}
already_AddRefed<Promise> HTMLMediaElement::SeekToNextFrame(ErrorResult& aRv) {
/* This will cause JIT code to be kept around longer, to help performance
* when using SeekToNextFrame to iterate through every frame of a video.
*/
nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow();
if (win) {
if (JSObject* obj = win->AsGlobal()->GetGlobalJSObject()) {
js::NotifyAnimationActivity(obj);
}
}
return Seek(CurrentTime(), SeekTarget::NextFrame, aRv);
}
void HTMLMediaElement::SetCurrentTime(double aCurrentTime, ErrorResult& aRv) {
LOG(LogLevel::Debug,
("%p SetCurrentTime(%f) called by JS", this, aCurrentTime));
RefPtr<Promise> tobeDropped =
Seek(aCurrentTime, SeekTarget::Accurate, IgnoreErrors());
}
/**
* Check if aValue is inside a range of aRanges, and if so returns true
* and puts the range index in aIntervalIndex. If aValue is not
* inside a range, returns false, and aIntervalIndex
* is set to the index of the range which starts immediately after aValue
* (and can be aRanges.Length() if aValue is after the last range).
*/
static bool IsInRanges(TimeRanges& aRanges, double aValue,
uint32_t& aIntervalIndex) {
uint32_t length = aRanges.Length();
for (uint32_t i = 0; i < length; i++) {
double start = aRanges.Start(i);
if (start > aValue) {
aIntervalIndex = i;
return false;
}
double end = aRanges.End(i);
if (aValue <= end) {
aIntervalIndex = i;
return true;
}
}
aIntervalIndex = length;
return false;
}
already_AddRefed<Promise> HTMLMediaElement::Seek(double aTime,
SeekTarget::Type aSeekType,
ErrorResult& aRv) {
// Note: Seek is called both by synchronous code that expects errors thrown in
// aRv, as well as asynchronous code that expects a promise. Make sure all
// synchronous errors are returned using aRv, not promise rejections.
// aTime should be non-NaN.
MOZ_ASSERT(!mozilla::IsNaN(aTime));
// Seeking step1, Set the media element's show poster flag to false.
// https://html.spec.whatwg.org/multipage/media.html#dom-media-seek
mShowPoster = false;
RefPtr<Promise> promise = CreateDOMPromise(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// Detect if user has interacted with element by seeking so that
// play will not be blocked when initiated by a script.
if (EventStateManager::IsHandlingUserInput()) {
mIsBlessed = true;
}
StopSuspendingAfterFirstFrame();
if (mSrcAttrStream) {
// do nothing since media streams have an empty Seekable range.
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
if (mPlayed && mCurrentPlayRangeStart != -1.0) {
double rangeEndTime = CurrentTime();
LOG(LogLevel::Debug, ("%p Adding \'played\' a range : [%f, %f]", this,
mCurrentPlayRangeStart, rangeEndTime));
// Multiple seek without playing, or seek while playing.
if (mCurrentPlayRangeStart != rangeEndTime) {
mPlayed->Add(mCurrentPlayRangeStart, rangeEndTime);
}
// Reset the current played range start time. We'll re-set it once
// the seek completes.
mCurrentPlayRangeStart = -1.0;
}
if (mReadyState == HAVE_NOTHING) {
mDefaultPlaybackStartPosition = aTime;
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
if (!mDecoder) {
// mDecoder must always be set in order to reach this point.
NS_ASSERTION(mDecoder, "SetCurrentTime failed: no decoder");
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
// Clamp the seek target to inside the seekable ranges.
media::TimeIntervals seekableIntervals = mDecoder->GetSeekable();
if (seekableIntervals.IsInvalid()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
RefPtr<TimeRanges> seekable =
new TimeRanges(ToSupports(OwnerDoc()), seekableIntervals);
uint32_t length = seekable->Length();
if (length == 0) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
// If the position we want to seek to is not in a seekable range, we seek
// to the closest position in the seekable ranges instead. If two positions
// are equally close, we seek to the closest position from the currentTime.
// See seeking spec, point 7 :
// http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#seeking
uint32_t range = 0;
bool isInRange = IsInRanges(*seekable, aTime, range);
if (!isInRange) {
if (range == 0) {
// aTime is before the first range in |seekable|, the closest point we can
// seek to is the start of the first range.
aTime = seekable->Start(0);
} else if (range == length) {
// Seek target is after the end last range in seekable data.
// Clamp the seek target to the end of the last seekable range.
aTime = seekable->End(length - 1);
} else {
double leftBound = seekable->End(range - 1);
double rightBound = seekable->Start(range);
double distanceLeft = Abs(leftBound - aTime);
double distanceRight = Abs(rightBound - aTime);
if (distanceLeft == distanceRight) {
double currentTime = CurrentTime();
distanceLeft = Abs(leftBound - currentTime);
distanceRight = Abs(rightBound - currentTime);
}
aTime = (distanceLeft < distanceRight) ? leftBound : rightBound;
}
}
// TODO: The spec requires us to update the current time to reflect the
// actual seek target before beginning the synchronous section, but
// that requires changing all MediaDecoderReaders to support telling
// us the fastSeek target, and it's currently not possible to get
// this information as we don't yet control the demuxer for all
// MediaDecoderReaders.
mPlayingBeforeSeek = IsPotentiallyPlaying();
// If the audio track is silent before seeking, we should end current silence
// range and start a new range after seeking. Since seek() could be called
// multiple times before seekEnd() executed, we should only calculate silence
// range when first time seek() called. Calculating on other seek() calls
// would cause a wrong result. In order to get correct time, this checking
// should be called before decoder->seek().
if (IsAudioTrackCurrentlySilent() &&
!mHasAccumulatedSilenceRangeBeforeSeekEnd) {
AccumulateAudioTrackSilence();
mHasAccumulatedSilenceRangeBeforeSeekEnd = true;
}
// The media backend is responsible for dispatching the timeupdate
// event if it changes the playback position as a result of the seek.
LOG(LogLevel::Debug, ("%p SetCurrentTime(%f) starting seek", this, aTime));
mDecoder->Seek(aTime, aSeekType);
// We changed whether we're seeking so we need to AddRemoveSelfReference.
AddRemoveSelfReference();
// Keep the DOM promise.
mSeekDOMPromise = promise;
return promise.forget();
}
double HTMLMediaElement::Duration() const {
if (mSrcStream) {
if (mSrcStreamPlaybackEnded) {
return CurrentTime();
}
return std::numeric_limits<double>::infinity();
}
if (mDecoder) {
return mDecoder->GetDuration();
}
return std::numeric_limits<double>::quiet_NaN();
}
already_AddRefed<TimeRanges> HTMLMediaElement::Seekable() const {
media::TimeIntervals seekable =
mDecoder ? mDecoder->GetSeekable() : media::TimeIntervals();
RefPtr<TimeRanges> ranges = new TimeRanges(ToSupports(OwnerDoc()), seekable);
return ranges.forget();
}
already_AddRefed<TimeRanges> HTMLMediaElement::Played() {
RefPtr<TimeRanges> ranges = new TimeRanges(ToSupports(OwnerDoc()));
uint32_t timeRangeCount = 0;
if (mPlayed) {
timeRangeCount = mPlayed->Length();
}
for (uint32_t i = 0; i < timeRangeCount; i++) {
double begin = mPlayed->Start(i);
double end = mPlayed->End(i);
ranges->Add(begin, end);
}
if (mCurrentPlayRangeStart != -1.0) {
double now = CurrentTime();
if (mCurrentPlayRangeStart != now) {
ranges->Add(mCurrentPlayRangeStart, now);
}
}
ranges->Normalize();
return ranges.forget();
}
void HTMLMediaElement::Pause(ErrorResult& aRv) {
LOG(LogLevel::Debug, ("%p Pause() called by JS", this));
if (mNetworkState == NETWORK_EMPTY) {
LOG(LogLevel::Debug, ("Loading due to Pause()"));
DoLoad();
} else if (mDecoder) {
mDecoder->Pause();
}
bool oldPaused = mPaused;
mPaused = true;
mAutoplaying = false;
// We changed mPaused and mAutoplaying which can affect AddRemoveSelfReference
AddRemoveSelfReference();
UpdateSrcMediaStreamPlaying();
if (mAudioChannelWrapper) {
mAudioChannelWrapper->NotifyPlayStateChanged();
}
if (!oldPaused) {
FireTimeUpdate(false);
DispatchAsyncEvent(NS_LITERAL_STRING("pause"));
AsyncRejectPendingPlayPromises(NS_ERROR_DOM_MEDIA_ABORT_ERR);
}
}
void HTMLMediaElement::SetVolume(double aVolume, ErrorResult& aRv) {
LOG(LogLevel::Debug, ("%p SetVolume(%f) called by JS", this, aVolume));
if (aVolume < 0.0 || aVolume > 1.0) {
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
return;
}
if (aVolume == mVolume) return;
mVolume = aVolume;
// Here we want just to update the volume.
SetVolumeInternal();
DispatchAsyncEvent(NS_LITERAL_STRING("volumechange"));
// We allow inaudible autoplay. But changing our volume may make this
// media audible. So pause if we are no longer supposed to be autoplaying.
PauseIfShouldNotBePlaying();
}
void HTMLMediaElement::MozGetMetadata(JSContext* cx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) {
if (mReadyState < HAVE_METADATA) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
JS::Rooted<JSObject*> tags(cx, JS_NewPlainObject(cx));
if (!tags) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
if (mTags) {
for (auto iter = mTags->ConstIter(); !iter.Done(); iter.Next()) {
nsString wideValue;
CopyUTF8toUTF16(iter.UserData(), wideValue);
JS::Rooted<JSString*> string(cx,
JS_NewUCStringCopyZ(cx, wideValue.Data()));
if (!string || !JS_DefineProperty(cx, tags, iter.Key().Data(), string,
JSPROP_ENUMERATE)) {
NS_WARNING("couldn't create metadata object!");
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
}
aRetval.set(tags);
}
void HTMLMediaElement::SetMutedInternal(uint32_t aMuted) {
uint32_t oldMuted = mMuted;
mMuted = aMuted;
if (!!aMuted == !!oldMuted) {
return;
}
SetVolumeInternal();
}
void HTMLMediaElement::PauseIfShouldNotBePlaying() {
if (GetPaused()) {
return;
}
if (!AutoplayPolicy::IsAllowedToPlay(*this)) {
AUTOPLAY_LOG("pause because not allowed to play, element=%p", this);
ErrorResult rv;
Pause(rv);
OwnerDoc()->SetDocTreeHadPlayRevoked();
}
}
void HTMLMediaElement::SetVolumeInternal() {
float effectiveVolume = ComputedVolume();
if (mDecoder) {
mDecoder->SetVolume(effectiveVolume);
} else if (MediaStream* stream = GetSrcMediaStream()) {
if (mSrcStreamIsPlaying) {
stream->SetAudioOutputVolume(this, effectiveVolume);
}
}
NotifyAudioPlaybackChanged(
AudioChannelService::AudibleChangedReasons::eVolumeChanged);
}
void HTMLMediaElement::SetMuted(bool aMuted) {
LOG(LogLevel::Debug, ("%p SetMuted(%d) called by JS", this, aMuted));
if (aMuted == Muted()) {
return;
}
if (aMuted) {
SetMutedInternal(mMuted | MUTED_BY_CONTENT);
} else {
SetMutedInternal(mMuted & ~MUTED_BY_CONTENT);
}
DispatchAsyncEvent(NS_LITERAL_STRING("volumechange"));
// We allow inaudible autoplay. But changing our mute status may make this
// media audible. So pause if we are no longer supposed to be autoplaying.
PauseIfShouldNotBePlaying();
}
void HTMLMediaElement::SetCapturedOutputStreamsEnabled(bool aEnabled) {
for (OutputMediaStream& ms : mOutputStreams) {
if (ms.mCapturingDecoder) {
MOZ_ASSERT(!ms.mCapturingMediaStream);
continue;
}
for (auto pair : ms.mTrackPorts) {
MediaStream* outputSource = ms.mStream->GetInputStream();
if (!outputSource) {
NS_ERROR("No output source stream");
return;
}
TrackID id = pair.second()->GetDestinationTrackId();
outputSource->SetTrackEnabled(
id, aEnabled ? DisabledTrackMode::ENABLED
: DisabledTrackMode::SILENCE_FREEZE);
LOG(LogLevel::Debug,
("%s track %d for captured MediaStream %p",
aEnabled ? "Enabled" : "Disabled", id, ms.mStream.get()));
}
}
}
void HTMLMediaElement::AddCaptureMediaTrackToOutputStream(
MediaTrack* aTrack, OutputMediaStream& aOutputStream, bool aAsyncAddtrack) {
if (aOutputStream.mCapturingDecoder) {
MOZ_ASSERT(!aOutputStream.mCapturingMediaStream);
return;
}
aOutputStream.mCapturingMediaStream = true;
if (aOutputStream.mStream == mSrcStream) {
// Cycle detected. This can happen since tracks are added async.
// We avoid forwarding it to the output here or we'd get into an infloop.
return;
}
MediaStream* outputSource = aOutputStream.mStream->GetInputStream();
if (!outputSource) {
NS_ERROR("No output source stream");
return;
}
ProcessedMediaStream* processedOutputSource =
outputSource->AsProcessedStream();
if (!processedOutputSource) {
NS_ERROR("Input stream not a ProcessedMediaStream");
return;
}
if (!aTrack) {
MOZ_ASSERT(false, "Bad MediaTrack");
return;
}
MediaStreamTrack* inputTrack = mSrcStream->GetTrackById(aTrack->GetId());
MOZ_ASSERT(inputTrack);
if (!inputTrack) {
NS_ERROR("Input track not found in source stream");
return;
}
#if DEBUG
for (auto pair : aOutputStream.mTrackPorts) {
MOZ_ASSERT(pair.first() != aTrack->GetId(),
"Captured track already captured to output stream");
}
#endif
TrackID destinationTrackID = aOutputStream.mNextAvailableTrackID++;
RefPtr<MediaStreamTrackSource> source =
new StreamCaptureTrackSource(this, &inputTrack->GetSource(),
aOutputStream.mStream, destinationTrackID);
MediaSegment::Type type = inputTrack->AsAudioStreamTrack()
? MediaSegment::AUDIO
: MediaSegment::VIDEO;
RefPtr<MediaStreamTrack> track =
aOutputStream.mStream->CreateDOMTrack(destinationTrackID, type, source);
if (aAsyncAddtrack) {
mMainThreadEventTarget->Dispatch(
NewRunnableMethod<StoreRefPtrPassByPtr<MediaStreamTrack>>(
"DOMMediaStream::AddTrackInternal", aOutputStream.mStream,
&DOMMediaStream::AddTrackInternal, track));
} else {
aOutputStream.mStream->AddTrackInternal(track);
}
// Track is muted initially, so we don't leak data if it's added while paused
// and an MSG iteration passes before the mute comes into effect.
processedOutputSource->SetTrackEnabled(destinationTrackID,
DisabledTrackMode::SILENCE_FREEZE);
RefPtr<MediaInputPort> port = inputTrack->ForwardTrackContentsTo(
processedOutputSource, destinationTrackID);
Pair<nsString, RefPtr<MediaInputPort>> p(aTrack->GetId(), port);
aOutputStream.mTrackPorts.AppendElement(std::move(p));
if (mSrcStreamIsPlaying) {
processedOutputSource->SetTrackEnabled(destinationTrackID,
DisabledTrackMode::ENABLED);
}
LOG(LogLevel::Debug,
("Created %s track %p with id %d from track %p through MediaInputPort %p",
inputTrack->AsAudioStreamTrack() ? "audio" : "video", track.get(),
destinationTrackID, inputTrack, port.get()));
}
void HTMLMediaElement::DiscardFinishWhenEndedOutputStreams() {
// Discard all output streams that have finished now.
for (int32_t i = mOutputStreams.Length() - 1; i >= 0; --i) {
if (!mOutputStreams[i].mFinishWhenEnded) {
continue;
}
LOG(LogLevel::Debug,
("Playback ended. Letting output stream %p go inactive",
mOutputStreams[i].mStream.get()));
mOutputStreams[i].mStream->SetFinishedOnInactive(true);
if (mOutputStreams[i].mCapturingDecoder) {
mDecoder->RemoveOutputStream(mOutputStreams[i].mStream);
}
mOutputStreams.RemoveElementAt(i);
}
}
bool HTMLMediaElement::CanBeCaptured(StreamCaptureType aCaptureType) {
// Don't bother capturing when the document has gone away
nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow();
if (!window) {
return false;
}
// Prevent capturing restricted video
if (aCaptureType == StreamCaptureType::CAPTURE_ALL_TRACKS &&
ContainsRestrictedContent()) {
return false;
}
return true;
}
already_AddRefed<DOMMediaStream> HTMLMediaElement::CaptureStreamInternal(
StreamCaptureBehavior aFinishBehavior, StreamCaptureType aStreamCaptureType,
MediaStreamGraph* aGraph) {
MOZ_RELEASE_ASSERT(aGraph);
MOZ_ASSERT(CanBeCaptured(aStreamCaptureType));
MarkAsContentSource(CallerAPI::CAPTURE_STREAM);
MarkAsTainted();
// We don't support routing to a different graph.
if (!mOutputStreams.IsEmpty() &&
aGraph != mOutputStreams[0].mStream->GetInputStream()->Graph()) {
return nullptr;
}
OutputMediaStream* out = mOutputStreams.AppendElement();
nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow();
out->mStream = DOMMediaStream::CreateTrackUnionStreamAsInput(window, aGraph);
out->mStream->SetFinishedOnInactive(false);
out->mFinishWhenEnded =
aFinishBehavior == StreamCaptureBehavior::FINISH_WHEN_ENDED;
out->mCapturingAudioOnly =
aStreamCaptureType == StreamCaptureType::CAPTURE_AUDIO;
if (aStreamCaptureType == StreamCaptureType::CAPTURE_AUDIO) {
if (mSrcStream) {
// We don't support applying volume and mute to the captured stream, when
// capturing a MediaStream.
ReportToConsole(nsIScriptError::errorFlag,
"MediaElementAudioCaptureOfMediaStreamError");
return nullptr;
}
// mAudioCaptured tells the user that the audio played by this media element
// is being routed to the captureStreams *instead* of being played to
// speakers.
mAudioCaptured = true;
}
if (mDecoder) {
out->mCapturingDecoder = true;
mDecoder->AddOutputStream(out->mStream);
} else if (mSrcStream) {
out->mCapturingMediaStream = true;
}
if (mReadyState == HAVE_NOTHING) {
// Do not expose the tracks until we have metadata.
RefPtr<DOMMediaStream> result = out->mStream;
return result.forget();
}
if (mSrcStream) {
MOZ_DIAGNOSTIC_ASSERT(AudioTracks(), "Element can't have been unlinked");
for (size_t i = 0; i < AudioTracks()->Length(); ++i) {
AudioTrack* t = (*AudioTracks())[i];
if (t->Enabled()) {
AddCaptureMediaTrackToOutputStream(t, *out, false);
}
}
if (IsVideo() && !out->mCapturingAudioOnly) {
MOZ_DIAGNOSTIC_ASSERT(VideoTracks(), "Element can't have been unlinked");
// Only add video tracks if we're a video element and the output stream
// wants video.
for (size_t i = 0; i < VideoTracks()->Length(); ++i) {
VideoTrack* t = (*VideoTracks())[i];
if (t->Selected()) {
AddCaptureMediaTrackToOutputStream(t, *out, false);
}
}
}
}
RefPtr<DOMMediaStream> result = out->mStream;
return result.forget();
}
already_AddRefed<DOMMediaStream> HTMLMediaElement::CaptureAudio(
ErrorResult& aRv, MediaStreamGraph* aGraph) {
MOZ_RELEASE_ASSERT(aGraph);
if (!CanBeCaptured(StreamCaptureType::CAPTURE_AUDIO)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
RefPtr<DOMMediaStream> stream =
CaptureStreamInternal(StreamCaptureBehavior::CONTINUE_WHEN_ENDED,
StreamCaptureType::CAPTURE_AUDIO, aGraph);
if (!stream) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
return stream.forget();
}
RefPtr<GenericNonExclusivePromise> HTMLMediaElement::GetAllowedToPlayPromise() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mOutputStreams.IsEmpty(),
"This method should only be called during stream capturing!");
if (AutoplayPolicy::IsAllowedToPlay(*this)) {
AUTOPLAY_LOG("MediaElement %p has allowed to play, resolve promise", this);
return GenericNonExclusivePromise::CreateAndResolve(true, __func__);
}
AUTOPLAY_LOG("create allow-to-play promise for MediaElement %p", this);
return mAllowedToPlayPromise.Ensure(__func__);
}
already_AddRefed<DOMMediaStream> HTMLMediaElement::MozCaptureStream(
ErrorResult& aRv) {
MediaStreamGraph::GraphDriverType graphDriverType =
HasAudio() ? MediaStreamGraph::AUDIO_THREAD_DRIVER
: MediaStreamGraph::SYSTEM_THREAD_DRIVER;
nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow();
if (!window) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
if (!CanBeCaptured(StreamCaptureType::CAPTURE_ALL_TRACKS)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
MediaStreamGraph* graph = MediaStreamGraph::GetInstance(
graphDriverType, window, MediaStreamGraph::REQUEST_DEFAULT_SAMPLE_RATE);
RefPtr<DOMMediaStream> stream =
CaptureStreamInternal(StreamCaptureBehavior::CONTINUE_WHEN_ENDED,
StreamCaptureType::CAPTURE_ALL_TRACKS, graph);
if (!stream) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
return stream.forget();
}
already_AddRefed<DOMMediaStream> HTMLMediaElement::MozCaptureStreamUntilEnded(
ErrorResult& aRv) {
MediaStreamGraph::GraphDriverType graphDriverType =
HasAudio() ? MediaStreamGraph::AUDIO_THREAD_DRIVER
: MediaStreamGraph::SYSTEM_THREAD_DRIVER;
nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow();
if (!window) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
if (!CanBeCaptured(StreamCaptureType::CAPTURE_ALL_TRACKS)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
MediaStreamGraph* graph = MediaStreamGraph::GetInstance(
graphDriverType, window, MediaStreamGraph::REQUEST_DEFAULT_SAMPLE_RATE);
RefPtr<DOMMediaStream> stream =
CaptureStreamInternal(StreamCaptureBehavior::FINISH_WHEN_ENDED,
StreamCaptureType::CAPTURE_ALL_TRACKS, graph);
if (!stream) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
return stream.forget();
}
class MediaElementSetForURI : public nsURIHashKey {
public:
explicit MediaElementSetForURI(const nsIURI* aKey) : nsURIHashKey(aKey) {}
MediaElementSetForURI(MediaElementSetForURI&& aOther)
: nsURIHashKey(std::move(aOther)),
mElements(std::move(aOther.mElements)) {}
nsTArray<HTMLMediaElement*> mElements;
};
typedef nsTHashtable<MediaElementSetForURI> MediaElementURITable;
// Elements in this table must have non-null mDecoder and mLoadingSrc, and those
// can't change while the element is in the table. The table is keyed by
// the element's mLoadingSrc. Each entry has a list of all elements with the
// same mLoadingSrc.
static MediaElementURITable* gElementTable;
#ifdef DEBUG
static bool URISafeEquals(nsIURI* a1, nsIURI* a2) {
if (!a1 || !a2) {
// Consider two empty URIs *not* equal!
return false;
}
bool equal = false;
nsresult rv = a1->Equals(a2, &equal);
return NS_SUCCEEDED(rv) && equal;
}
// Returns the number of times aElement appears in the media element table
// for aURI. If this returns other than 0 or 1, there's a bug somewhere!
static unsigned MediaElementTableCount(HTMLMediaElement* aElement,
nsIURI* aURI) {
if (!gElementTable || !aElement) {
return 0;
}
uint32_t uriCount = 0;
uint32_t otherCount = 0;
for (auto it = gElementTable->ConstIter(); !it.Done(); it.Next()) {
MediaElementSetForURI* entry = it.Get();
uint32_t count = 0;
for (const auto& elem : entry->mElements) {
if (elem == aElement) {
count++;
}
}
if (URISafeEquals(aURI, entry->GetKey())) {
uriCount = count;
} else {
otherCount += count;
}
}
NS_ASSERTION(otherCount == 0, "Should not have entries for unknown URIs");
return uriCount;
}
#endif
void HTMLMediaElement::AddMediaElementToURITable() {
NS_ASSERTION(mDecoder, "Call this only with decoder Load called");
NS_ASSERTION(
MediaElementTableCount(this, mLoadingSrc) == 0,
"Should not have entry for element in element table before addition");
if (!gElementTable) {
gElementTable = new MediaElementURITable();
}
MediaElementSetForURI* entry = gElementTable->PutEntry(mLoadingSrc);
entry->mElements.AppendElement(this);
NS_ASSERTION(
MediaElementTableCount(this, mLoadingSrc) == 1,
"Should have a single entry for element in element table after addition");
}
void HTMLMediaElement::RemoveMediaElementFromURITable() {
if (!mDecoder || !mLoadingSrc || !gElementTable) {
return;
}
MediaElementSetForURI* entry = gElementTable->GetEntry(mLoadingSrc);
if (!entry) {
return;
}
entry->mElements.RemoveElement(this);
if (entry->mElements.IsEmpty()) {
gElementTable->RemoveEntry(entry);
if (gElementTable->Count() == 0) {
delete gElementTable;
gElementTable = nullptr;
}
}
NS_ASSERTION(MediaElementTableCount(this, mLoadingSrc) == 0,
"After remove, should no longer have an entry in element table");
}
HTMLMediaElement* HTMLMediaElement::LookupMediaElementURITable(nsIURI* aURI) {
if (!gElementTable) {
return nullptr;
}
MediaElementSetForURI* entry = gElementTable->GetEntry(aURI);
if (!entry) {
return nullptr;
}
for (uint32_t i = 0; i < entry->mElements.Length(); ++i) {
HTMLMediaElement* elem = entry->mElements[i];
bool equal;
// Look for elements that have the same principal and CORS mode.
// Ditto for anything else that could cause us to send different headers.
if (NS_SUCCEEDED(elem->NodePrincipal()->Equals(NodePrincipal(), &equal)) &&
equal && elem->mCORSMode == mCORSMode) {
// See SetupDecoder() below. We only add a element to the table when
// mDecoder is a ChannelMediaDecoder.
auto decoder = static_cast<ChannelMediaDecoder*>(elem->mDecoder.get());
NS_ASSERTION(decoder, "Decoder gone");
if (decoder->CanClone()) {
return elem;
}
}
}
return nullptr;
}
class HTMLMediaElement::ShutdownObserver : public nsIObserver {
enum class Phase : int8_t { Init, Subscribed, Unsubscribed };
public:
NS_DECL_ISUPPORTS
NS_IMETHOD Observe(nsISupports*, const char* aTopic,
const char16_t*) override {
if (mPhase != Phase::Subscribed) {
// Bail out if we are not subscribed for this might be called even after
// |nsContentUtils::UnregisterShutdownObserver(this)|.
return NS_OK;
}
MOZ_DIAGNOSTIC_ASSERT(mWeak);
if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
mWeak->NotifyShutdownEvent();
}
return NS_OK;
}
void Subscribe(HTMLMediaElement* aPtr) {
MOZ_DIAGNOSTIC_ASSERT(mPhase == Phase::Init);
MOZ_DIAGNOSTIC_ASSERT(!mWeak);
mWeak = aPtr;
nsContentUtils::RegisterShutdownObserver(this);
mPhase = Phase::Subscribed;
}
void Unsubscribe() {
MOZ_DIAGNOSTIC_ASSERT(mPhase == Phase::Subscribed);
MOZ_DIAGNOSTIC_ASSERT(mWeak);
MOZ_DIAGNOSTIC_ASSERT(!mAddRefed,
"ReleaseMediaElement should have been called first");
mWeak = nullptr;
nsContentUtils::UnregisterShutdownObserver(this);
mPhase = Phase::Unsubscribed;
}
void AddRefMediaElement() {
MOZ_DIAGNOSTIC_ASSERT(mWeak);
MOZ_DIAGNOSTIC_ASSERT(!mAddRefed, "Should only ever AddRef once");
mWeak->AddRef();
mAddRefed = true;
}
void ReleaseMediaElement() {
MOZ_DIAGNOSTIC_ASSERT(mWeak);
MOZ_DIAGNOSTIC_ASSERT(mAddRefed, "Should only release after AddRef");
mWeak->Release();
mAddRefed = false;
}
private:
virtual ~ShutdownObserver() {
MOZ_DIAGNOSTIC_ASSERT(mPhase == Phase::Unsubscribed);
MOZ_DIAGNOSTIC_ASSERT(!mWeak);
MOZ_DIAGNOSTIC_ASSERT(!mAddRefed,
"ReleaseMediaElement should have been called first");
}
// Guaranteed to be valid by HTMLMediaElement.
HTMLMediaElement* mWeak = nullptr;
Phase mPhase = Phase::Init;
bool mAddRefed = false;
};
NS_IMPL_ISUPPORTS(HTMLMediaElement::ShutdownObserver, nsIObserver)
HTMLMediaElement::HTMLMediaElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
: nsGenericHTMLElement(std::move(aNodeInfo)),
mWatchManager(this,
OwnerDoc()->AbstractMainThreadFor(TaskCategory::Other)),
mMainThreadEventTarget(OwnerDoc()->EventTargetFor(TaskCategory::Other)),
mAbstractMainThread(
OwnerDoc()->AbstractMainThreadFor(TaskCategory::Other)),
mShutdownObserver(new ShutdownObserver),
mPlayed(new TimeRanges(ToSupports(OwnerDoc()))),
mPaused(true, "HTMLMediaElement::mPaused"),
mErrorSink(new ErrorSink(this)),
mAudioChannelWrapper(new AudioChannelAgentCallback(this)),
mSink(MakePair(nsString(), RefPtr<AudioDeviceInfo>())),
mShowPoster(IsVideo()) {
MOZ_ASSERT(mMainThreadEventTarget);
MOZ_ASSERT(mAbstractMainThread);
// Please don't add anything to this constructor or the initialization
// list that can cause AddRef to be called. This prevents subclasses
// from overriding AddRef in a way that works with our refcount
// logging mechanisms. Put these things inside of the ::Init method
// instead.
}
void HTMLMediaElement::Init() {
MOZ_ASSERT(mRefCnt == 0 && !mRefCnt.IsPurple(),
"HTMLMediaElement::Init called when AddRef has been called "
"at least once already, probably in the constructor. Please "
"see the documentation in the HTMLMediaElement constructor.");
MOZ_ASSERT(!mRefCnt.IsPurple());
mAudioTrackList = new AudioTrackList(OwnerDoc()->GetParentObject(), this);
mVideoTrackList = new VideoTrackList(OwnerDoc()->GetParentObject(), this);
DecoderDoctorLogger::LogConstruction(this);
mWatchManager.Watch(mPaused, &HTMLMediaElement::UpdateWakeLock);
ErrorResult rv;
double defaultVolume = Preferences::GetFloat("media.default_volume", 1.0);
SetVolume(defaultVolume, rv);
RegisterActivityObserver();
NotifyOwnerDocumentActivityChanged();
// We initialize the MediaShutdownManager as the HTMLMediaElement is always
// constructed on the main thread, and not during stable state.
// (MediaShutdownManager make use of nsIAsyncShutdownClient which is written
// in JS)
MediaShutdownManager::InitStatics();
mShutdownObserver->Subscribe(this);
mInitialized = true;
}
HTMLMediaElement::~HTMLMediaElement() {
MOZ_ASSERT(mInitialized,
"HTMLMediaElement must be initialized before it is destroyed.");
NS_ASSERTION(
!mHasSelfReference,
"How can we be destroyed if we're still holding a self reference?");
mShutdownObserver->Unsubscribe();
if (mVideoFrameContainer) {
mVideoFrameContainer->ForgetElement();
}
UnregisterActivityObserver();
mSetCDMRequest.DisconnectIfExists();
mAllowedToPlayPromise.RejectIfExists(NS_ERROR_FAILURE, __func__);
if (mDecoder) {
ShutdownDecoder();
}
if (mProgressTimer) {
StopProgress();
}
if (mVideoDecodeSuspendTimer) {
mVideoDecodeSuspendTimer->Cancel();
mVideoDecodeSuspendTimer = nullptr;
}
if (mSrcStream) {
EndSrcMediaStreamPlayback();
}
if (mCaptureStreamPort) {
mCaptureStreamPort->Destroy();
mCaptureStreamPort = nullptr;
}
NS_ASSERTION(MediaElementTableCount(this, mLoadingSrc) == 0,
"Destroyed media element should no longer be in element table");
if (mChannelLoader) {
mChannelLoader->Cancel();
}
if (mAudioChannelWrapper) {
mAudioChannelWrapper->Shutdown();
mAudioChannelWrapper = nullptr;
}
WakeLockRelease();
ReportPlayedTimeAfterBlockedTelemetry();
DecoderDoctorLogger::LogDestruction(this);
}
void HTMLMediaElement::StopSuspendingAfterFirstFrame() {
mAllowSuspendAfterFirstFrame = false;
if (!mSuspendedAfterFirstFrame) return;
mSuspendedAfterFirstFrame = false;
if (mDecoder) {
mDecoder->Resume();
}
}
void HTMLMediaElement::SetPlayedOrSeeked(bool aValue) {
if (aValue == mHasPlayedOrSeeked) {
return;
}
mHasPlayedOrSeeked = aValue;
// Force a reflow so that the poster frame hides or shows immediately.
nsIFrame* frame = GetPrimaryFrame();
if (!frame) {
return;
}
frame->PresShell()->FrameNeedsReflow(frame, IntrinsicDirty::TreeChange,
NS_FRAME_IS_DIRTY);
}
void HTMLMediaElement::NotifyXPCOMShutdown() { ShutdownDecoder(); }
bool HTMLMediaElement::AudioChannelAgentDelayingPlayback() {
return mAudioChannelWrapper && mAudioChannelWrapper->IsPlaybackBlocked();
}
void HTMLMediaElement::UpdateHadAudibleAutoplayState() {
// If we're audible, and autoplaying...
if ((Volume() > 0.0 && !Muted()) &&
(!OwnerDoc()->HasBeenUserGestureActivated() || Autoplay())) {
OwnerDoc()->SetDocTreeHadAudibleMedia();
if (AutoplayPolicy::WouldBeAllowedToPlayIfAutoplayDisabled(*this)) {
ScalarAdd(Telemetry::ScalarID::MEDIA_AUTOPLAY_WOULD_BE_ALLOWED_COUNT, 1);
if (mReadyState >= HAVE_METADATA && !HasAudio()) {
ScalarAdd(
Telemetry::ScalarID::MEDIA_ALLOWED_AUTOPLAY_NO_AUDIO_TRACK_COUNT,
1);
}
} else {
if (mReadyState < HAVE_METADATA) {
mBlockedAsWithoutMetadata = true;
ScalarAdd(Telemetry::ScalarID::MEDIA_BLOCKED_NO_METADATA, 1);
}
ScalarAdd(Telemetry::ScalarID::MEDIA_AUTOPLAY_WOULD_NOT_BE_ALLOWED_COUNT,
1);
}
}
}
already_AddRefed<Promise> HTMLMediaElement::Play(ErrorResult& aRv) {
LOG(LogLevel::Debug,
("%p Play() called by JS readyState=%d", this, mReadyState));
// 4.8.12.8
// When the play() method on a media element is invoked, the user agent must
// run the following steps.
RefPtr<PlayPromise> promise = CreatePlayPromise(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// 4.8.12.8 - Step 1:
// If the media element is not allowed to play, return a promise rejected
// with a "NotAllowedError" DOMException and abort these steps.
// NOTE: we may require requesting permission from the user, so we do the
// "not allowed" check below.
// 4.8.12.8 - Step 2:
// If the media element's error attribute is not null and its code
// attribute has the value MEDIA_ERR_SRC_NOT_SUPPORTED, return a promise
// rejected with a "NotSupportedError" DOMException and abort these steps.
if (GetError() && GetError()->Code() == MEDIA_ERR_SRC_NOT_SUPPORTED) {
LOG(LogLevel::Debug,
("%p Play() promise rejected because source not supported.", this));
promise->MaybeReject(NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR);
return promise.forget();
}
// 4.8.12.8 - Step 3:
// Let promise be a new promise and append promise to the list of pending
// play promises.
// Note: Promise appended to list of pending promises as needed below.
if (AudioChannelAgentDelayingPlayback()) {
// The audio channel agent may delay starting playback of a media resource
// until the tab the media element is in has been in the foreground.
// Save a reference to the promise, and return it. The AudioChannelAgent
// will call Play() again if the tab is brought to the foreground, or the
// audio tab indicator is clicked, which will resolve the promise if we end
// up playing.
LOG(LogLevel::Debug, ("%p Play() call delayed by AudioChannelAgent", this));
MaybeDoLoad();
mPendingPlayPromises.AppendElement(promise);
return promise.forget();
}
if (AudioChannelAgentBlockedPlay()) {
LOG(LogLevel::Debug, ("%p play blocked by AudioChannelAgent.", this));
promise->MaybeReject(NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR);
return promise.forget();
}
UpdateHadAudibleAutoplayState();
const bool handlingUserInput = EventStateManager::IsHandlingUserInput();
mPendingPlayPromises.AppendElement(promise);
if (AutoplayPolicy::IsAllowedToPlay(*this)) {
AUTOPLAY_LOG("allow MediaElement %p to play", this);
mAllowedToPlayPromise.ResolveIfExists(true, __func__);
PlayInternal(handlingUserInput);
UpdateCustomPolicyAfterPlayed();
} else {
AUTOPLAY_LOG("reject MediaElement %p to play", this);
AsyncRejectPendingPlayPromises(NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR);
}
return promise.forget();
}
void HTMLMediaElement::DispatchEventsWhenPlayWasNotAllowed() {
if (StaticPrefs::media_autoplay_block_event_enabled()) {
DispatchAsyncEvent(NS_LITERAL_STRING("blocked"));
}
#if defined(MOZ_WIDGET_ANDROID)
RefPtr<AsyncEventDispatcher> asyncDispatcher = new AsyncEventDispatcher(
this, NS_LITERAL_STRING("MozAutoplayMediaBlocked"), CanBubble::eYes,
ChromeOnlyDispatch::eYes);
asyncDispatcher->PostDOMEvent();
#endif
OwnerDoc()->MaybeNotifyAutoplayBlocked();
ReportToConsole(nsIScriptError::warningFlag, "BlockAutoplayError");
mHasPlayEverBeenBlocked = true;
mHasEverBeenBlockedForAutoplay = true;
}
void HTMLMediaElement::PlayInternal(bool aHandlingUserInput) {
if (mPreloadAction == HTMLMediaElement::PRELOAD_NONE) {
// The media load algorithm will be initiated by a user interaction.
// We want to boost the channel priority for better responsiveness.
// Note this must be done before UpdatePreloadAction() which will
// update |mPreloadAction|.
mUseUrgentStartForChannel = true;
}
StopSuspendingAfterFirstFrame();
SetPlayedOrSeeked(true);
// 4.8.12.8 - Step 4:
// If the media element's networkState attribute has the value NETWORK_EMPTY,
// invoke the media element's resource selection algorithm.
MaybeDoLoad();
if (mSuspendedForPreloadNone) {
ResumeLoad(PRELOAD_ENOUGH);
}
// 4.8.12.8 - Step 5:
// If the playback has ended and the direction of playback is forwards,
// seek to the earliest possible position of the media resource.
// Even if we just did Load() or ResumeLoad(), we could already have a decoder
// here if we managed to clone an existing decoder.
if (mDecoder) {
if (mDecoder->IsEnded()) {
SetCurrentTime(0);
}
if (!mPausedForInactiveDocumentOrChannel) {
mDecoder->Play();
}
}
if (mCurrentPlayRangeStart == -1.0) {
mCurrentPlayRangeStart = CurrentTime();
}
const bool oldPaused = mPaused;
mPaused = false;
mAutoplaying = false;
// We changed mPaused and mAutoplaying which can affect AddRemoveSelfReference
// and our preload status.
AddRemoveSelfReference();
UpdatePreloadAction();
UpdateSrcMediaStreamPlaying();
// Once play() has been called in a user generated event handler,
// it is allowed to autoplay. Note: we can reach here when not in
// a user generated event handler if our readyState has not yet
// reached HAVE_METADATA.
mIsBlessed |= aHandlingUserInput;
// TODO: If the playback has ended, then the user agent must set
// seek to the effective start.
// 4.8.12.8 - Step 6:
// If the media element's paused attribute is true, run the following steps:
if (oldPaused) {
// 6.1. Change the value of paused to false. (Already done.)
// This step is uplifted because the "block-media-playback" feature needs
// the mPaused to be false before UpdateAudioChannelPlayingState() being
// called.
// 6.2. If the show poster flag is true, set the element's show poster flag
// to false and run the time marches on steps.
if (mShowPoster) {
mShowPoster = false;
if (mTextTrackManager) {
mTextTrackManager->TimeMarchesOn();
}
}
// 6.3. Queue a task to fire a simple event named play at the element.
DispatchAsyncEvent(NS_LITERAL_STRING("play"));
// 6.4. If the media element's readyState attribute has the value
// HAVE_NOTHING, HAVE_METADATA, or HAVE_CURRENT_DATA, queue a task to
// fire a simple event named waiting at the element.
// Otherwise, the media element's readyState attribute has the value
// HAVE_FUTURE_DATA or HAVE_ENOUGH_DATA: notify about playing for the
// element.
switch (mReadyState) {
case HAVE_NOTHING:
DispatchAsyncEvent(NS_LITERAL_STRING("waiting"));
break;
case HAVE_METADATA:
case HAVE_CURRENT_DATA:
DispatchAsyncEvent(NS_LITERAL_STRING("waiting"));
break;
case HAVE_FUTURE_DATA:
case HAVE_ENOUGH_DATA:
NotifyAboutPlaying();
break;
}
} else if (mReadyState >= HAVE_FUTURE_DATA) {
// 7. Otherwise, if the media element's readyState attribute has the value
// HAVE_FUTURE_DATA or HAVE_ENOUGH_DATA, take pending play promises and
// queue a task to resolve pending play promises with the result.
AsyncResolvePendingPlayPromises();
}
// 8. Set the media element's autoplaying flag to false. (Already done.)
// 9. Return promise.
// (Done in caller.)
}
void HTMLMediaElement::MaybeDoLoad() {
if (mNetworkState == NETWORK_EMPTY) {
DoLoad();
}
}
void HTMLMediaElement::UpdateWakeLock() {
MOZ_ASSERT(NS_IsMainThread());
// Ensure we have a wake lock if we're playing audibly. This ensures the
// device doesn't sleep while playing.
bool playing = !mPaused;
bool isAudible = Volume() > 0.0 && !mMuted && mIsAudioTrackAudible;
// WakeLock when playing audible media.
if (playing && isAudible) {
CreateAudioWakeLockIfNeeded();
} else {
ReleaseAudioWakeLockIfExists();
}
}
void HTMLMediaElement::CreateAudioWakeLockIfNeeded() {
if (!mWakeLock) {
RefPtr<power::PowerManagerService> pmService =
power::PowerManagerService::GetInstance();
NS_ENSURE_TRUE_VOID(pmService);
ErrorResult rv;
mWakeLock = pmService->NewWakeLock(NS_LITERAL_STRING("audio-playing"),
OwnerDoc()->GetInnerWindow(), rv);
}
}
void HTMLMediaElement::ReleaseAudioWakeLockIfExists() {
if (mWakeLock) {
ErrorResult rv;
mWakeLock->Unlock(rv);
rv.SuppressException();
mWakeLock = nullptr;
}
}
void HTMLMediaElement::WakeLockRelease() { ReleaseAudioWakeLockIfExists(); }
HTMLMediaElement::OutputMediaStream::OutputMediaStream()
: mNextAvailableTrackID(1),
mFinishWhenEnded(false),
mCapturingAudioOnly(false),
mCapturingDecoder(false),
mCapturingMediaStream(false) {}
HTMLMediaElement::OutputMediaStream::~OutputMediaStream() {
for (auto pair : mTrackPorts) {
pair.second()->Destroy();
}
}
void HTMLMediaElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
if (!this->Controls() || !aVisitor.mEvent->mFlags.mIsTrusted) {
nsGenericHTMLElement::GetEventTargetParent(aVisitor);
return;
}
HTMLInputElement* el = nullptr;
nsCOMPtr<nsINode> node;
// We will need to trap pointer, touch, and mouse events within the media
// element, allowing media control exclusive consumption on these events,
// and preventing the content from handling them.
switch (aVisitor.mEvent->mMessage) {
case ePointerDown:
case ePointerUp:
case eTouchEnd:
// Always prevent touchmove captured in video element from being handled by
// content, since we always do that for touchstart.
case eTouchMove:
case eTouchStart:
case eMouseClick:
case eMouseDoubleClick:
case eMouseDown:
case eMouseUp:
aVisitor.mCanHandle = false;
return;
// The *move events however are only comsumed when the range input is being
// dragged.
case ePointerMove:
case eMouseMove:
node = do_QueryInterface(aVisitor.mEvent->mOriginalTarget);
if (node->IsInNativeAnonymousSubtree() || node->IsInUAWidget()) {
if (node->IsHTMLElement(nsGkAtoms::input)) {
// The node is a <input type="range">
el = static_cast<HTMLInputElement*>(node.get());
} else if (node->GetParentNode() &&
node->GetParentNode()->IsHTMLElement(nsGkAtoms::input)) {
// The node is a child of <input type="range">
el = static_cast<HTMLInputElement*>(node->GetParentNode());
}
}
if (el && el->IsDraggingRange()) {
aVisitor.mCanHandle = false;
return;
}
nsGenericHTMLElement::GetEventTargetParent(aVisitor);
return;
default:
nsGenericHTMLElement::GetEventTargetParent(aVisitor);
return;
}
}
bool HTMLMediaElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) {
// Mappings from 'preload' attribute strings to an enumeration.
static const nsAttrValue::EnumTable kPreloadTable[] = {
{"", HTMLMediaElement::PRELOAD_ATTR_EMPTY},
{"none", HTMLMediaElement::PRELOAD_ATTR_NONE},
{"metadata", HTMLMediaElement::PRELOAD_ATTR_METADATA},
{"auto", HTMLMediaElement::PRELOAD_ATTR_AUTO},
{nullptr, 0}};
if (aNamespaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::crossorigin) {
ParseCORSValue(aValue, aResult);
return true;
}
if (aAttribute == nsGkAtoms::preload) {
return aResult.ParseEnumValue(aValue, kPreloadTable, false);
}
}
return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
aMaybeScriptedPrincipal, aResult);
}
void HTMLMediaElement::DoneCreatingElement() {
if (HasAttr(kNameSpaceID_None, nsGkAtoms::muted)) {
mMuted |= MUTED_BY_CONTENT;
}
}
bool HTMLMediaElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
int32_t* aTabIndex) {
if (nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable,
aTabIndex)) {
return true;
}
*aIsFocusable = true;
return false;
}
int32_t HTMLMediaElement::TabIndexDefault() { return 0; }
nsresult HTMLMediaElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) {
if (aNameSpaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::src) {
mSrcMediaSource = nullptr;
mSrcAttrTriggeringPrincipal = nsContentUtils::GetAttrTriggeringPrincipal(
this, aValue ? aValue->GetStringValue() : EmptyString(),
aMaybeScriptedPrincipal);
if (aValue) {
nsString srcStr = aValue->GetStringValue();
nsCOMPtr<nsIURI> uri;
NewURIFromString(srcStr, getter_AddRefs(uri));
if (uri && IsMediaSourceURI(uri)) {
nsresult rv = NS_GetSourceForMediaSourceURI(
uri, getter_AddRefs(mSrcMediaSource));
if (NS_FAILED(rv)) {
nsAutoString spec;
GetCurrentSrc(spec);
AutoTArray<nsString, 1> params = {spec};
ReportLoadError("MediaLoadInvalidURI", params);
}
}
}
} else if (aName == nsGkAtoms::autoplay) {
if (aNotify) {
if (aValue) {
StopSuspendingAfterFirstFrame();
CheckAutoplayDataReady();
}
// This attribute can affect AddRemoveSelfReference
AddRemoveSelfReference();
UpdatePreloadAction();
}
} else if (aName == nsGkAtoms::preload) {
UpdatePreloadAction();
} else if (aName == nsGkAtoms::loop) {
if (mDecoder) {
mDecoder->SetLooping(!!aValue);
}
} else if (aName == nsGkAtoms::controls && IsInComposedDoc()) {
NotifyUAWidgetSetupOrChange();
}
}
// Since AfterMaybeChangeAttr may call DoLoad, make sure that it is called
// *after* any possible changes to mSrcMediaSource.
if (aValue) {
AfterMaybeChangeAttr(aNameSpaceID, aName, aNotify);
}
return nsGenericHTMLElement::AfterSetAttr(
aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify);
}
nsresult HTMLMediaElement::OnAttrSetButNotChanged(
int32_t aNamespaceID, nsAtom* aName, const nsAttrValueOrString& aValue,
bool aNotify) {
AfterMaybeChangeAttr(aNamespaceID, aName, aNotify);
return nsGenericHTMLElement::OnAttrSetButNotChanged(aNamespaceID, aName,
aValue, aNotify);
}
void HTMLMediaElement::AfterMaybeChangeAttr(int32_t aNamespaceID, nsAtom* aName,
bool aNotify) {
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::src) {
DoLoad();
}
}
}
nsresult HTMLMediaElement::BindToTree(BindContext& aContext, nsINode& aParent) {
nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent);
if (IsInComposedDoc()) {
// Construct Shadow Root so web content can be hidden in the DOM.
AttachAndSetUAShadowRoot();
NotifyUAWidgetSetupOrChange();
}
if (IsInUncomposedDoc()) {
// The preload action depends on the value of the autoplay attribute.
// It's value may have changed, so update it.
UpdatePreloadAction();
}
NotifyDecoderActivityChanges();
return rv;
}
/* static */
void HTMLMediaElement::VideoDecodeSuspendTimerCallback(nsITimer* aTimer,
void* aClosure) {
MOZ_ASSERT(NS_IsMainThread());
auto element = static_cast<HTMLMediaElement*>(aClosure);
element->mVideoDecodeSuspendTime.Start();
element->mVideoDecodeSuspendTimer = nullptr;
}
void HTMLMediaElement::HiddenVideoStart() {
MOZ_ASSERT(NS_IsMainThread());
mHiddenPlayTime.Start();
if (mVideoDecodeSuspendTimer) {
// Already started, just keep it running.
return;
}
NS_NewTimerWithFuncCallback(
getter_AddRefs(mVideoDecodeSuspendTimer), VideoDecodeSuspendTimerCallback,
this, StaticPrefs::media_suspend_bkgnd_video_delay_ms(),
nsITimer::TYPE_ONE_SHOT,
"HTMLMediaElement::VideoDecodeSuspendTimerCallback",
mMainThreadEventTarget);
}
void HTMLMediaElement::HiddenVideoStop() {
MOZ_ASSERT(NS_IsMainThread());
mHiddenPlayTime.Pause();
mVideoDecodeSuspendTime.Pause();
if (!mVideoDecodeSuspendTimer) {
return;
}
mVideoDecodeSuspendTimer->Cancel();
mVideoDecodeSuspendTimer = nullptr;
}
void HTMLMediaElement::ReportTelemetry() {
// Report telemetry for videos when a page is unloaded. We
// want to know data on what state the video is at when
// the user has exited.
enum UnloadedState {
ENDED = 0,
PAUSED = 1,
STALLED = 2,
SEEKING = 3,
OTHER = 4
};
UnloadedState state = OTHER;
if (Seeking()) {
state = SEEKING;
} else if (Ended()) {
state = ENDED;
} else if (Paused()) {
state = PAUSED;
} else {
// For buffering we check if the current playback position is at the end
// of a buffered range, within a margin of error. We also consider to be
// buffering if the last frame status was buffering and the ready state is
// HAVE_CURRENT_DATA to account for times where we are in a buffering state
// regardless of what actual data we have buffered.
bool stalled = false;
RefPtr<TimeRanges> ranges = Buffered();
const double errorMargin = 0.05;
double t = CurrentTime();
TimeRanges::index_type index = ranges->Find(t, errorMargin);
stalled =
index != TimeRanges::NoIndex && (ranges->End(index) - t) < errorMargin;
stalled |= mDecoder &&
NextFrameStatus() ==
MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE_BUFFERING &&
mReadyState == HAVE_CURRENT_DATA;
if (stalled) {
state = STALLED;
}
}
Telemetry::Accumulate(Telemetry::VIDEO_UNLOAD_STATE, state);
LOG(LogLevel::Debug, ("%p VIDEO_UNLOAD_STATE = %d", this, state));
FrameStatisticsData data;
if (HTMLVideoElement* vid = HTMLVideoElement::FromNodeOrNull(this)) {
FrameStatistics* stats = vid->GetFrameStatistics();
if (stats) {
data = stats->GetFrameStatisticsData();
uint64_t parsedFrames = stats->GetParsedFrames();
if (parsedFrames) {
uint64_t droppedFrames = stats->GetDroppedFrames();
MOZ_ASSERT(droppedFrames <= parsedFrames);
// Dropped frames <= total frames, so 'percentage' cannot be higher than
// 100 and therefore can fit in a uint32_t (that Telemetry takes).
uint32_t percentage = 100 * droppedFrames / parsedFrames;
LOG(LogLevel::Debug,
("Reporting telemetry DROPPED_FRAMES_IN_VIDEO_PLAYBACK"));
Telemetry::Accumulate(Telemetry::VIDEO_DROPPED_FRAMES_PROPORTION,
percentage);
}
}
}
if (mMediaInfo.HasVideo() && mMediaInfo.mVideo.mImage.height > 0) {
// We have a valid video.
double playTime = mPlayTime.Total();
double hiddenPlayTime = mHiddenPlayTime.Total();
double videoDecodeSuspendTime = mVideoDecodeSuspendTime.Total();
Telemetry::Accumulate(Telemetry::VIDEO_PLAY_TIME_MS,
SECONDS_TO_MS(playTime));
LOG(LogLevel::Debug, ("%p VIDEO_PLAY_TIME_MS = %f", this, playTime));
Telemetry::Accumulate(Telemetry::VIDEO_HIDDEN_PLAY_TIME_MS,
SECONDS_TO_MS(hiddenPlayTime));
LOG(LogLevel::Debug,
("%p VIDEO_HIDDEN_PLAY_TIME_MS = %f", this, hiddenPlayTime));
if (playTime > 0.0) {
// We have actually played something -> Report some valid-video telemetry.
// Keyed by audio+video or video alone, and by a resolution range.
nsCString key(mMediaInfo.HasAudio() ? "AV," : "V,");
static const struct {
int32_t mH;
const char* mRes;
} sResolutions[] = {{240, "0<h<=240"}, {480, "240<h<=480"},
{576, "480<h<=576"}, {720, "576<h<=720"},
{1080, "720<h<=1080"}, {2160, "1080<h<=2160"}};
const char* resolution = "h>2160";
int32_t height = mMediaInfo.mVideo.mImage.height;
for (const auto& res : sResolutions) {
if (height <= res.mH) {
resolution = res.mRes;
break;
}
}
key.AppendASCII(resolution);
uint32_t hiddenPercentage =
uint32_t(hiddenPlayTime / playTime * 100.0 + 0.5);
Telemetry::Accumulate(Telemetry::VIDEO_HIDDEN_PLAY_TIME_PERCENTAGE, key,
hiddenPercentage);
// Also accumulate all percentages in an "All" key.
Telemetry::Accumulate(Telemetry::VIDEO_HIDDEN_PLAY_TIME_PERCENTAGE,
NS_LITERAL_CSTRING("All"), hiddenPercentage);
LOG(LogLevel::Debug,
("%p VIDEO_HIDDEN_PLAY_TIME_PERCENTAGE = %u, keys: '%s' and 'All'",
this, hiddenPercentage, key.get()));
uint32_t videoDecodeSuspendPercentage =
uint32_t(videoDecodeSuspendTime / playTime * 100.0 + 0.5);
Telemetry::Accumulate(Telemetry::VIDEO_INFERRED_DECODE_SUSPEND_PERCENTAGE,
key, videoDecodeSuspendPercentage);
Telemetry::Accumulate(Telemetry::VIDEO_INFERRED_DECODE_SUSPEND_PERCENTAGE,
NS_LITERAL_CSTRING("All"),
videoDecodeSuspendPercentage);
LOG(LogLevel::Debug,
("%p VIDEO_INFERRED_DECODE_SUSPEND_PERCENTAGE = %u, keys: '%s' and "
"'All'",
this, videoDecodeSuspendPercentage, key.get()));
if (data.mInterKeyframeCount != 0) {
uint32_t average_ms = uint32_t(std::min<uint64_t>(
double(data.mInterKeyframeSum_us) /
double(data.mInterKeyframeCount) / 1000.0 +
0.5,
UINT32_MAX));
Telemetry::Accumulate(Telemetry::VIDEO_INTER_KEYFRAME_AVERAGE_MS, key,
average_ms);
Telemetry::Accumulate(Telemetry::VIDEO_INTER_KEYFRAME_AVERAGE_MS,
NS_LITERAL_CSTRING("All"), average_ms);
LOG(LogLevel::Debug,
("%p VIDEO_INTER_KEYFRAME_AVERAGE_MS = %u, keys: '%s' and 'All'",
this, average_ms, key.get()));
uint32_t max_ms = uint32_t(std::min<uint64_t>(
(data.mInterKeyFrameMax_us + 500) / 1000, UINT32_MAX));
Telemetry::Accumulate(Telemetry::VIDEO_INTER_KEYFRAME_MAX_MS, key,
max_ms);
Telemetry::Accumulate(Telemetry::VIDEO_INTER_KEYFRAME_MAX_MS,
NS_LITERAL_CSTRING("All"), max_ms);
LOG(LogLevel::Debug,
("%p VIDEO_INTER_KEYFRAME_MAX_MS = %u, keys: '%s' and 'All'", this,
max_ms, key.get()));
} else {
// Here, we have played *some* of the video, but didn't get more than 1
// keyframe. Report '0' if we have played for longer than the video-
// decode-suspend delay (showing recovery would be difficult).
uint32_t suspendDelay_ms =
StaticPrefs::media_suspend_bkgnd_video_delay_ms();
if (uint32_t(playTime * 1000.0) > suspendDelay_ms) {
Telemetry::Accumulate(Telemetry::VIDEO_INTER_KEYFRAME_MAX_MS, key, 0);
Telemetry::Accumulate(Telemetry::VIDEO_INTER_KEYFRAME_MAX_MS,
NS_LITERAL_CSTRING("All"), 0);
LOG(LogLevel::Debug,
("%p VIDEO_INTER_KEYFRAME_MAX_MS = 0 (only 1 keyframe), keys: "
"'%s' and 'All'",
this, key.get()));
}
}
}
}
}
void HTMLMediaElement::UnbindFromTree(bool aNullParent) {
mVisibilityState = Visibility::Untracked;
if (IsInComposedDoc()) {
NotifyUAWidgetTeardown();
}
nsGenericHTMLElement::UnbindFromTree(aNullParent);
MOZ_ASSERT(IsHidden());
NotifyDecoderActivityChanges();
// Dispatch a task to run once we're in a stable state which ensures we're
// paused if we're no longer in a document. Note we set a flag here to
// ensure we don't dispatch redundant tasks.
if (!mDispatchedTaskToPauseIfNotInDocument) {
mDispatchedTaskToPauseIfNotInDocument = true;
nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction(
"dom::HTMLMediaElement::UnbindFromTree",
[self = RefPtr<HTMLMediaElement>(this)]() {
self->mDispatchedTaskToPauseIfNotInDocument = false;
if (!self->IsInComposedDoc()) {
self->Pause();
}
});
RunInStableState(task);
}
}
/* static */
CanPlayStatus HTMLMediaElement::GetCanPlay(
const nsAString& aType, DecoderDoctorDiagnostics* aDiagnostics) {
Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
if (!containerType) {
return CANPLAY_NO;
}
CanPlayStatus status =
DecoderTraits::CanHandleContainerType(*containerType, aDiagnostics);
if (status == CANPLAY_YES &&
(*containerType).ExtendedType().Codecs().IsEmpty()) {
// Per spec: 'Generally, a user agent should never return "probably" for a
// type that allows the `codecs` parameter if that parameter is not
// present.' As all our currently-supported types allow for `codecs`, we can
// do this check here.
// TODO: Instead, missing `codecs` should be checked in each decoder's
// `IsSupportedType` call from `CanHandleCodecsType()`.
// See bug 1399023.
return CANPLAY_MAYBE;
}
return status;
}
void HTMLMediaElement::CanPlayType(const nsAString& aType, nsAString& aResult) {
DecoderDoctorDiagnostics diagnostics;
CanPlayStatus canPlay = GetCanPlay(aType, &diagnostics);
diagnostics.StoreFormatDiagnostics(OwnerDoc(), aType, canPlay != CANPLAY_NO,
__func__);
switch (canPlay) {
case CANPLAY_NO:
aResult.Truncate();
break;
case CANPLAY_YES:
aResult.AssignLiteral("probably");
break;
case CANPLAY_MAYBE:
aResult.AssignLiteral("maybe");
break;
default:
MOZ_ASSERT_UNREACHABLE("Unexpected case.");
break;
}
LOG(LogLevel::Debug,
("%p CanPlayType(%s) = \"%s\"", this, NS_ConvertUTF16toUTF8(aType).get(),
NS_ConvertUTF16toUTF8(aResult).get()));
}
void HTMLMediaElement::AssertReadyStateIsNothing() {
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
if (mReadyState != HAVE_NOTHING) {
char buf[1024];
SprintfLiteral(buf,
"readyState=%d networkState=%d mLoadWaitStatus=%d "
"mSourceLoadCandidate=%d "
"mIsLoadingFromSourceChildren=%d mPreloadAction=%d "
"mSuspendedForPreloadNone=%d error=%d",
int(mReadyState), int(mNetworkState), int(mLoadWaitStatus),
!!mSourceLoadCandidate, mIsLoadingFromSourceChildren,
int(mPreloadAction), mSuspendedForPreloadNone,
GetError() ? GetError()->Code() : 0);
MOZ_CRASH_UNSAFE_PRINTF("ReadyState should be HAVE_NOTHING! %s", buf);
}
#endif
}
nsresult HTMLMediaElement::InitializeDecoderAsClone(
ChannelMediaDecoder* aOriginal) {
NS_ASSERTION(mLoadingSrc, "mLoadingSrc must already be set");
NS_ASSERTION(mDecoder == nullptr, "Shouldn't have a decoder");
AssertReadyStateIsNothing();
MediaDecoderInit decoderInit(
this, mMuted ? 0.0 : mVolume, mPreservesPitch,
ClampPlaybackRate(mPlaybackRate),
mPreloadAction == HTMLMediaElement::PRELOAD_METADATA, mHasSuspendTaint,
HasAttr(kNameSpaceID_None, nsGkAtoms::loop), aOriginal->ContainerType());
RefPtr<ChannelMediaDecoder> decoder = aOriginal->Clone(decoderInit);
if (!decoder) return NS_ERROR_FAILURE;
LOG(LogLevel::Debug,
("%p Cloned decoder %p from %p", this, decoder.get(), aOriginal));
return FinishDecoderSetup(decoder);
}
template <typename DecoderType, typename... LoadArgs>
nsresult HTMLMediaElement::SetupDecoder(DecoderType* aDecoder,
LoadArgs&&... aArgs) {
LOG(LogLevel::Debug, ("%p Created decoder %p for type %s", this, aDecoder,
aDecoder->ContainerType().OriginalString().Data()));
nsresult rv = aDecoder->Load(std::forward<LoadArgs>(aArgs)...);
if (NS_FAILED(rv)) {
aDecoder->Shutdown();
LOG(LogLevel::Debug, ("%p Failed to load for decoder %p", this, aDecoder));
return rv;
}
rv = FinishDecoderSetup(aDecoder);
// Only ChannelMediaDecoder supports resource cloning.
if (IsSame<DecoderType, ChannelMediaDecoder>::value && NS_SUCCEEDED(rv)) {
AddMediaElementToURITable();
NS_ASSERTION(
MediaElementTableCount(this, mLoadingSrc) == 1,
"Media element should have single table entry if decode initialized");
}
return rv;
}
nsresult HTMLMediaElement::InitializeDecoderForChannel(
nsIChannel* aChannel, nsIStreamListener** aListener) {
NS_ASSERTION(mLoadingSrc, "mLoadingSrc must already be set");
AssertReadyStateIsNothing();
DecoderDoctorDiagnostics diagnostics;
nsAutoCString mimeType;
aChannel->GetContentType(mimeType);
NS_ASSERTION(!mimeType.IsEmpty(), "We should have the Content-Type.");
NS_ConvertUTF8toUTF16 mimeUTF16(mimeType);
RefPtr<HTMLMediaElement> self = this;
auto reportCanPlay = [&, self](bool aCanPlay) {
diagnostics.StoreFormatDiagnostics(self->OwnerDoc(), mimeUTF16, aCanPlay,
__func__);
if (!aCanPlay) {
nsAutoString src;
self->GetCurrentSrc(src);
AutoTArray<nsString, 2> params = {mimeUTF16, src};
self->ReportLoadError("MediaLoadUnsupportedMimeType", params);
}
};
auto onExit = MakeScopeExit([self] {
if (self->mChannelLoader) {
self->mChannelLoader->Done();
self->mChannelLoader = nullptr;
}
});
Maybe<MediaContainerType> containerType = MakeMediaContainerType(mimeType);
if (!containerType) {
reportCanPlay(false);
return NS_ERROR_FAILURE;
}
MediaDecoderInit decoderInit(
this, mMuted ? 0.0 : mVolume, mPreservesPitch,
ClampPlaybackRate(mPlaybackRate),
mPreloadAction == HTMLMediaElement::PRELOAD_METADATA, mHasSuspendTaint,
HasAttr(kNameSpaceID_None, nsGkAtoms::loop), *containerType);
#ifdef MOZ_ANDROID_HLS_SUPPORT
if (HLSDecoder::IsSupportedType(*containerType)) {
RefPtr<HLSDecoder> decoder = HLSDecoder::Create(decoderInit);
if (!decoder) {
reportCanPlay(false);
return NS_ERROR_OUT_OF_MEMORY;
}
reportCanPlay(true);
return SetupDecoder(decoder.get(), aChannel);
}
#endif
RefPtr<ChannelMediaDecoder> decoder =
ChannelMediaDecoder::Create(decoderInit, &diagnostics);
if (!decoder) {
reportCanPlay(false);
return NS_ERROR_FAILURE;
}
reportCanPlay(true);
bool isPrivateBrowsing = NodePrincipal()->GetPrivateBrowsingId() > 0;
return SetupDecoder(decoder.get(), aChannel, isPrivateBrowsing, aListener);
}
nsresult HTMLMediaElement::FinishDecoderSetup(MediaDecoder* aDecoder) {
ChangeNetworkState(NETWORK_LOADING);
// Set mDecoder now so if methods like GetCurrentSrc get called between
// here and Load(), they work.
SetDecoder(aDecoder);
// Notify the decoder of the initial activity status.
NotifyDecoderActivityChanges();
// Update decoder principal before we start decoding, since it
// can affect how we feed data to MediaStreams
NotifyDecoderPrincipalChanged();
// Set sink device if we have one. Otherwise the default is used.
if (mSink.second()) {
mDecoder
->SetSink(mSink.second())
#ifdef DEBUG
->Then(mAbstractMainThread, __func__,
[](const GenericPromise::ResolveOrRejectValue& aValue) {
MOZ_ASSERT(aValue.IsResolve() && !aValue.ResolveValue());
});
#else
;
#endif
}
if (!mOutputStreams.IsEmpty()) {
mDecoder->SetNextOutputStreamTrackID(
mNextAvailableMediaDecoderOutputTrackID);
}
for (OutputMediaStream& ms : mOutputStreams) {
if (ms.mCapturingMediaStream) {
MOZ_ASSERT(!ms.mCapturingDecoder);
continue;
}
ms.mCapturingDecoder = true;
aDecoder->AddOutputStream(ms.mStream);
}
if (mMediaKeys) {
if (mMediaKeys->GetCDMProxy()) {
mDecoder->SetCDMProxy(mMediaKeys->GetCDMProxy());
} else {
// CDM must have crashed.
ShutdownDecoder();
return NS_ERROR_FAILURE;
}
}
if (mChannelLoader) {
mChannelLoader->Done();
mChannelLoader = nullptr;
}
// We may want to suspend the new stream now.
// This will also do an AddRemoveSelfReference.
NotifyOwnerDocumentActivityChanged();
if (mPausedForInactiveDocumentOrChannel) {
mDecoder->Suspend();
}
if (!mPaused) {
SetPlayedOrSeeked(true);
if (!mPausedForInactiveDocumentOrChannel) {
mDecoder->Play();
}
}
MaybeBeginCloningVisually();
return NS_OK;
}
class HTMLMediaElement::MediaStreamTrackListener
: public DOMMediaStream::TrackListener {
public:
explicit MediaStreamTrackListener(HTMLMediaElement* aElement)
: mElement(aElement) {}
void NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack) override {
if (!mElement) {
return;
}
mElement->NotifyMediaStreamTrackAdded(aTrack);
}
void NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack) override {
if (!mElement) {
return;
}
mElement->NotifyMediaStreamTrackRemoved(aTrack);
}
void NotifyActive() override {
if (!mElement) {
return;
}
// mediacapture-main says:
// Note that once ended equals true the HTMLVideoElement will not play media
// even if new MediaStreamTracks are added to the MediaStream (causing it to
// return to the active state) unless autoplay is true or the web
// application restarts the element, e.g., by calling play().
//
// This is vague on exactly how to go from becoming active to playing, when
// autoplaying. However, per the media element spec, to play an autoplaying
// media element, we must load the source and reach readyState
// HAVE_ENOUGH_DATA [1]. Hence, a MediaStream being assigned to a media
// element and becoming active runs the load algorithm, so that it can
// eventually be played.
//
// [1]
// https://html.spec.whatwg.org/multipage/media.html#ready-states:event-media-play
LOG(LogLevel::Debug, ("%p, mSrcStream %p became active, checking if we "
"need to run the load algorithm",
mElement.get(), mElement->mSrcStream.get()));
if (!mElement->IsPlaybackEnded()) {
return;
}
if (!mElement->Autoplay()) {
return;
}
LOG(LogLevel::Info, ("%p, mSrcStream %p became active on autoplaying, "
"ended element. Reloading.",
mElement.get(), mElement->mSrcStream.get()));
mElement->DoLoad();
}
void NotifyInactive() override {
if (!mElement) {
return;
}
if (mElement->IsPlaybackEnded()) {
return;
}
LOG(LogLevel::Debug, ("%p, mSrcStream %p became inactive", mElement.get(),
mElement->mSrcStream.get()));
MOZ_ASSERT(!mElement->mSrcStream->Active());
mElement->PlaybackEnded();
mElement->UpdateReadyStateInternal();
}
protected:
const WeakPtr<HTMLMediaElement> mElement;
};
void HTMLMediaElement::UpdateSrcMediaStreamPlaying(uint32_t aFlags) {
if (!mSrcStream) {
return;
}
// We might be in cycle collection with mSrcStream->GetPlaybackStream()
// already returning null due to unlinking.
MediaStream* stream = GetSrcMediaStream();
MediaStreamGraph* graph = stream ? stream->Graph() : nullptr;
bool shouldPlay = !(aFlags & REMOVING_SRC_STREAM) && !mPaused &&
!mPausedForInactiveDocumentOrChannel && stream;
if (shouldPlay == mSrcStreamIsPlaying) {
return;
}
mSrcStreamIsPlaying = shouldPlay;
LOG(LogLevel::Debug,
("MediaElement %p %s playback of DOMMediaStream %p", this,
shouldPlay ? "Setting up" : "Removing", mSrcStream.get()));
if (shouldPlay) {
mSrcStreamPlaybackEnded = false;
mSrcStreamGraphTimeOffset +=
graph->CurrentTime() - mSrcStreamPausedGraphTime.ref();
mSrcStreamPausedGraphTime = Nothing();
mWatchManager.Watch(graph->CurrentTime(),
&HTMLMediaElement::UpdateSrcStreamTime);
stream->AddAudioOutput(this);
SetVolumeInternal();
if (mSink.second()) {
NS_WARNING(
"setSinkId() when playing a MediaStream is not supported yet and "
"will be ignored");
}
VideoFrameContainer* container = GetVideoFrameContainer();
if (mSelectedVideoStreamTrack && container) {
mSelectedVideoStreamTrack->AddVideoOutput(container);
MaybeBeginCloningVisually();
}
SetCapturedOutputStreamsEnabled(true); // Unmute
// If the input is a media stream, we don't check its data and always regard
// it as audible when it's playing.
SetAudibleState(true);
} else {
if (stream) {
MOZ_DIAGNOSTIC_ASSERT(mSrcStreamPausedGraphTime.isNothing());
mSrcStreamPausedGraphTime = Some(graph->CurrentTime().Ref());
mWatchManager.Unwatch(graph->CurrentTime(),
&HTMLMediaElement::UpdateSrcStreamTime);
stream->RemoveAudioOutput(this);
VideoFrameContainer* container = GetVideoFrameContainer();
if (mSelectedVideoStreamTrack && container) {
mSelectedVideoStreamTrack->RemoveVideoOutput(container);
HTMLVideoElement* self = static_cast<HTMLVideoElement*>(this);
if (self->VideoWidth() <= 1 && self->VideoHeight() <= 1) {
// MediaInfo uses dummy values of 1 for width and height to
// mark video as valid. We need a new first-frame listener
// if size is 0x0 or 1x1.
if (!mFirstFrameListener) {
mFirstFrameListener =
new FirstFrameListener(container, mAbstractMainThread);
}
mSelectedVideoStreamTrack->AddVideoOutput(mFirstFrameListener);
}
}
SetCapturedOutputStreamsEnabled(false); // Mute
}
// If stream is null, then DOMMediaStream::Destroy must have been
// called and that will remove all listeners/outputs.
}
}
void HTMLMediaElement::UpdateSrcStreamTime() {
MOZ_ASSERT(NS_IsMainThread());
if (mSrcStreamPlaybackEnded) {
// We do a separate FireTimeUpdate() when this is set.
return;
}
FireTimeUpdate(true);
}
void HTMLMediaElement::SetupSrcMediaStreamPlayback(DOMMediaStream* aStream) {
NS_ASSERTION(!mSrcStream && !mFirstFrameListener,
"Should have been ended already");
mSrcStream = aStream;
nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow();
if (!window) {
return;
}
mSrcStreamPausedGraphTime = Some(0);
if (MediaStream* stream = GetSrcMediaStream()) {
if (MediaStreamGraph* graph = stream->Graph()) {
// The current graph time will represent 0 for this media element.
mSrcStreamGraphTimeOffset = graph->CurrentTime();
mSrcStreamPausedGraphTime = Some(mSrcStreamGraphTimeOffset);
}
}
UpdateSrcMediaStreamPlaying();
// If we pause this media element, track changes in the underlying stream
// will continue to fire events at this element and alter its track list.
// That's simpler than delaying the events, but probably confusing...
nsTArray<RefPtr<MediaStreamTrack>> tracks;
mSrcStream->GetTracks(tracks);
for (const RefPtr<MediaStreamTrack>& track : tracks) {
NotifyMediaStreamTrackAdded(track);
}
mMediaStreamTrackListener = MakeUnique<MediaStreamTrackListener>(this);
mSrcStream->RegisterTrackListener(mMediaStreamTrackListener.get());
mSrcStream->AddPrincipalChangeObserver(this);
mSrcStreamVideoPrincipal = mSrcStream->GetVideoPrincipal();
ChangeNetworkState(NETWORK_IDLE);
ChangeDelayLoadStatus(false);
// FirstFrameLoaded() will be called when the stream has tracks.
}
void HTMLMediaElement::EndSrcMediaStreamPlayback() {
MOZ_ASSERT(mSrcStream);
UpdateSrcMediaStreamPlaying(REMOVING_SRC_STREAM);
if (mFirstFrameListener) {
mSelectedVideoStreamTrack->RemoveVideoOutput(mFirstFrameListener);
}
mSelectedVideoStreamTrack = nullptr;
mFirstFrameListener = nullptr;
mSrcStream->UnregisterTrackListener(mMediaStreamTrackListener.get());
mMediaStreamTrackListener = nullptr;
mSrcStreamTracksAvailable = false;
mSrcStreamPlaybackEnded = false;
mSrcStream->RemovePrincipalChangeObserver(this);
mSrcStreamVideoPrincipal = nullptr;
for (OutputMediaStream& ms : mOutputStreams) {
for (auto pair : ms.mTrackPorts) {
pair.second()->Destroy();
}
ms.mTrackPorts.Clear();
}
mSrcStream = nullptr;
}
static already_AddRefed<AudioTrack> CreateAudioTrack(
AudioStreamTrack* aStreamTrack, nsIGlobalObject* aOwnerGlobal) {
nsAutoString id;
nsAutoString label;
aStreamTrack->GetId(id);
aStreamTrack->GetLabel(label, CallerType::System);
return MediaTrackList::CreateAudioTrack(
aOwnerGlobal, id, NS_LITERAL_STRING("main"), label, EmptyString(), true);
}
static already_AddRefed<VideoTrack> CreateVideoTrack(
VideoStreamTrack* aStreamTrack, nsIGlobalObject* aOwnerGlobal) {
nsAutoString id;
nsAutoString label;
aStreamTrack->GetId(id);
aStreamTrack->GetLabel(label, CallerType::System);
return MediaTrackList::CreateVideoTrack(aOwnerGlobal, id,
NS_LITERAL_STRING("main"), label,
EmptyString(), aStreamTrack);
}
void HTMLMediaElement::NotifyMediaStreamTrackAdded(
const RefPtr<MediaStreamTrack>& aTrack) {
MOZ_ASSERT(aTrack);
if (aTrack->Ended()) {
return;
}
#ifdef DEBUG
nsString id;
aTrack->GetId(id);
LOG(LogLevel::Debug, ("%p, Adding %sTrack with id %s", this,
aTrack->AsAudioStreamTrack() ? "Audio" : "Video",
NS_ConvertUTF16toUTF8(id).get()));
#endif
if (AudioStreamTrack* t = aTrack->AsAudioStreamTrack()) {
MOZ_DIAGNOSTIC_ASSERT(AudioTracks(), "Element can't have been unlinked");
RefPtr<AudioTrack> audioTrack =
CreateAudioTrack(t, AudioTracks()->GetOwnerGlobal());
AudioTracks()->AddTrack(audioTrack);
} else if (VideoStreamTrack* t = aTrack->AsVideoStreamTrack()) {
// TODO: Fix this per the spec on bug 1273443.
if (!IsVideo()) {
return;
}
MOZ_DIAGNOSTIC_ASSERT(VideoTracks(), "Element can't have been unlinked");
RefPtr<VideoTrack> videoTrack =
CreateVideoTrack(t, VideoTracks()->GetOwnerGlobal());
VideoTracks()->AddTrack(videoTrack);
// New MediaStreamTrack added, set the new added video track as selected
// video track when there is no selected track.
if (VideoTracks()->SelectedIndex() == -1) {
MOZ_ASSERT(!mSelectedVideoStreamTrack);
videoTrack->SetEnabledInternal(true, MediaTrack::FIRE_NO_EVENTS);
}
}
UpdateReadyStateInternal();
if (!mSrcStreamTracksAvailable) {
mAbstractMainThread->Dispatch(NS_NewRunnableFunction(
"HTMLMediaElement::NotifyMediaStreamTrackAdded->FirstFrameLoaded",
[this, self = RefPtr<HTMLMediaElement>(this), stream = mSrcStream]() {
if (!mSrcStream || mSrcStream != stream) {
return;
}
LOG(LogLevel::Debug,
("MediaElement %p MediaStream tracks available", this));
mSrcStreamTracksAvailable = true;
FirstFrameLoaded();
UpdateReadyStateInternal();
}));
}
}
void HTMLMediaElement::NotifyMediaStreamTrackRemoved(
const RefPtr<MediaStreamTrack>& aTrack) {
MOZ_ASSERT(aTrack);
nsAutoString id;
aTrack->GetId(id);
LOG(LogLevel::Debug, ("%p, Removing %sTrack with id %s", this,
aTrack->AsAudioStreamTrack() ? "Audio" : "Video",
NS_ConvertUTF16toUTF8(id).get()));
MOZ_DIAGNOSTIC_ASSERT(AudioTracks() && VideoTracks(),
"Element can't have been unlinked");
if (MediaTrack* t = AudioTracks()->GetTrackById(id)) {
AudioTracks()->RemoveTrack(t);
} else if (MediaTrack* t = VideoTracks()->GetTrackById(id)) {
VideoTracks()->RemoveTrack(t);
} else {
NS_ASSERTION(aTrack->AsVideoStreamTrack() && !IsVideo(),
"MediaStreamTrack ended but did not exist in track lists. "
"This is only allowed if a video element ends and we are an "
"audio element.");
return;
}
}
void HTMLMediaElement::ProcessMediaFragmentURI() {
nsMediaFragmentURIParser parser(mLoadingSrc);
if (mDecoder && parser.HasEndTime()) {
mFragmentEnd = parser.GetEndTime();
}
if (parser.HasStartTime()) {
SetCurrentTime(parser.GetStartTime());
mFragmentStart = parser.GetStartTime();
}
}
void HTMLMediaElement::MetadataLoaded(const MediaInfo* aInfo,
UniquePtr<const MetadataTags> aTags) {
MOZ_ASSERT(NS_IsMainThread());
SetMediaInfo(*aInfo);
mIsEncrypted =
aInfo->IsEncrypted() || mPendingEncryptedInitData.IsEncrypted();
mTags = std::move(aTags);
mLoadedDataFired = false;
ChangeReadyState(HAVE_METADATA);
DispatchAsyncEvent(NS_LITERAL_STRING("durationchange"));
if (IsVideo() && HasVideo()) {
DispatchAsyncEvent(NS_LITERAL_STRING("resize"));
}
NS_ASSERTION(!HasVideo() || (mMediaInfo.mVideo.mDisplay.width > 0 &&
mMediaInfo.mVideo.mDisplay.height > 0),
"Video resolution must be known on 'loadedmetadata'");
DispatchAsyncEvent(NS_LITERAL_STRING("loadedmetadata"));
if (mBlockedAsWithoutMetadata && !HasAudio()) {
mBlockedAsWithoutMetadata = false;
ScalarAdd(
Telemetry::ScalarID::MEDIA_BLOCKED_NO_METADATA_ENDUP_NO_AUDIO_TRACK, 1);
}
if (mDecoder && mDecoder->IsTransportSeekable() &&
mDecoder->IsMediaSeekable()) {
ProcessMediaFragmentURI();
mDecoder->SetFragmentEndTime(mFragmentEnd);
}
if (mIsEncrypted) {
// We only support playback of encrypted content via MSE by default.
if (!mMediaSource && Preferences::GetBool("media.eme.mse-only", true)) {
DecodeError(
MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
"Encrypted content not supported outside of MSE"));
return;
}
// Dispatch a distinct 'encrypted' event for each initData we have.
for (const auto& initData : mPendingEncryptedInitData.mInitDatas) {
DispatchEncrypted(initData.mInitData, initData.mType);
}
mPendingEncryptedInitData.Reset();
}
if (IsVideo() && aInfo->HasVideo()) {
// We are a video element playing video so update the screen wakelock
NotifyOwnerDocumentActivityChanged();
}
if (mDefaultPlaybackStartPosition != 0.0) {
SetCurrentTime(mDefaultPlaybackStartPosition);
mDefaultPlaybackStartPosition = 0.0;
}
UpdateReadyStateInternal();
if (!mSrcStream) {
return;
}
for (OutputMediaStream& ms : mOutputStreams) {
if (AudioTracks()) {
for (size_t i = 0; i < AudioTracks()->Length(); ++i) {
AudioTrack* t = (*AudioTracks())[i];
if (t->Enabled()) {
AddCaptureMediaTrackToOutputStream(t, ms);
}
}
}
if (VideoTracks() && IsVideo() && !ms.mCapturingAudioOnly) {
// Only add video tracks if we're a video element and the output stream
// wants video.
for (size_t i = 0; i < VideoTracks()->Length(); ++i) {
VideoTrack* t = (*VideoTracks())[i];
if (t->Selected()) {
AddCaptureMediaTrackToOutputStream(t, ms);
}
}
}
}
}
void HTMLMediaElement::FirstFrameLoaded() {
LOG(LogLevel::Debug,
("%p, FirstFrameLoaded() mFirstFrameLoaded=%d mWaitingForKey=%d", this,
mFirstFrameLoaded, mWaitingForKey));
NS_ASSERTION(!mSuspendedAfterFirstFrame, "Should not have already suspended");
if (!mFirstFrameLoaded) {
mFirstFrameLoaded = true;
UpdateReadyStateInternal();
}
ChangeDelayLoadStatus(false);
if (mDecoder && mAllowSuspendAfterFirstFrame && mPaused &&
!HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay) &&
mPreloadAction == HTMLMediaElement::PRELOAD_METADATA) {
mSuspendedAfterFirstFrame = true;
mDecoder->Suspend();
}
}
void HTMLMediaElement::NetworkError(const MediaResult& aError) {
if (mReadyState == HAVE_NOTHING) {
NoSupportedMediaSourceError(aError.Description());
} else {
Error(MEDIA_ERR_NETWORK);
}
}
void HTMLMediaElement::DecodeError(const MediaResult& aError) {
nsAutoString src;
GetCurrentSrc(src);
AutoTArray<nsString, 1> params = {src};
ReportLoadError("MediaLoadDecodeError", params);
DecoderDoctorDiagnostics diagnostics;
diagnostics.StoreDecodeError(OwnerDoc(), aError, src, __func__);
if (AudioTracks()) {
AudioTracks()->EmptyTracks();
}
if (VideoTracks()) {
VideoTracks()->EmptyTracks();
}
if (mIsLoadingFromSourceChildren) {
mErrorSink->ResetError();
if (mSourceLoadCandidate) {
DispatchAsyncSourceError(mSourceLoadCandidate);
QueueLoadFromSourceTask();
} else {
NS_WARNING("Should know the source we were loading from!");
}
} else if (mReadyState == HAVE_NOTHING) {
NoSupportedMediaSourceError(aError.Description());
} else {
Error(MEDIA_ERR_DECODE, aError.Description());
}
}
void HTMLMediaElement::DecodeWarning(const MediaResult& aError) {
nsAutoString src;
GetCurrentSrc(src);
DecoderDoctorDiagnostics diagnostics;
diagnostics.StoreDecodeWarning(OwnerDoc(), aError, src, __func__);
}
bool HTMLMediaElement::HasError() const { return GetError(); }
void HTMLMediaElement::LoadAborted() { Error(MEDIA_ERR_ABORTED); }
void HTMLMediaElement::Error(uint16_t aErrorCode,
const nsACString& aErrorDetails) {
mErrorSink->SetError(aErrorCode, aErrorDetails);
ChangeDelayLoadStatus(false);
UpdateAudioChannelPlayingState();
}
void HTMLMediaElement::PlaybackEnded() {
// We changed state which can affect AddRemoveSelfReference
AddRemoveSelfReference();
NS_ASSERTION(!mDecoder || mDecoder->IsEnded(),
"Decoder fired ended, but not in ended state");
DiscardFinishWhenEndedOutputStreams();
if (mSrcStream) {
LOG(LogLevel::Debug,
("%p, got duration by reaching the end of the resource", this));
mSrcStreamPlaybackEnded = true;
DispatchAsyncEvent(NS_LITERAL_STRING("durationchange"));
} else {
// mediacapture-main:
// Setting the loop attribute has no effect since a MediaStream has no
// defined end and therefore cannot be looped.
if (HasAttr(kNameSpaceID_None, nsGkAtoms::loop)) {
SetCurrentTime(0);
return;
}
}
FireTimeUpdate(false);
if (!mPaused) {
Pause();
}
if (mSrcStream) {
// A MediaStream that goes from inactive to active shall be eligible for
// autoplay again according to the mediacapture-main spec.
mAutoplaying = true;
}
DispatchAsyncEvent(NS_LITERAL_STRING("ended"));
}
void HTMLMediaElement::SeekStarted() {
DispatchAsyncEvent(NS_LITERAL_STRING("seeking"));
}
void HTMLMediaElement::SeekCompleted() {
mPlayingBeforeSeek = false;
SetPlayedOrSeeked(true);
if (mTextTrackManager) {
mTextTrackManager->DidSeek();
}
FireTimeUpdate(false);
DispatchAsyncEvent(NS_LITERAL_STRING("seeked"));
// We changed whether we're seeking so we need to AddRemoveSelfReference
AddRemoveSelfReference();
if (mCurrentPlayRangeStart == -1.0) {
mCurrentPlayRangeStart = CurrentTime();
}
// After seeking completed, if the audio track is silent, start another new
// silence range.
mHasAccumulatedSilenceRangeBeforeSeekEnd = false;
if (IsAudioTrackCurrentlySilent()) {
UpdateAudioTrackSilenceRange(mIsAudioTrackAudible);
}
}
void HTMLMediaElement::NotifySuspendedByCache(bool aSuspendedByCache) {
mDownloadSuspendedByCache = aSuspendedByCache;
UpdateReadyStateInternal();
}
void HTMLMediaElement::DownloadSuspended() {
if (mNetworkState == NETWORK_LOADING) {
DispatchAsyncEvent(NS_LITERAL_STRING("progress"));
}
ChangeNetworkState(NETWORK_IDLE);
}
void HTMLMediaElement::DownloadResumed() {
ChangeNetworkState(NETWORK_LOADING);
}
void HTMLMediaElement::CheckProgress(bool aHaveNewProgress) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mNetworkState == NETWORK_LOADING);
TimeStamp now = TimeStamp::NowLoRes();
if (aHaveNewProgress) {
mDataTime = now;
}
// If this is the first progress, or PROGRESS_MS has passed since the last
// progress event fired and more data has arrived since then, fire a
// progress event.
NS_ASSERTION(
(mProgressTime.IsNull() && !aHaveNewProgress) || !mDataTime.IsNull(),
"null TimeStamp mDataTime should not be used in comparison");
if (mProgressTime.IsNull()
? aHaveNewProgress
: (now - mProgressTime >=
TimeDuration::FromMilliseconds(PROGRESS_MS) &&
mDataTime > mProgressTime)) {
DispatchAsyncEvent(NS_LITERAL_STRING("progress"));
// Resolution() ensures that future data will have now > mProgressTime,
// and so will trigger another event. mDataTime is not reset because it
// is still required to detect stalled; it is similarly offset by
// resolution to indicate the new data has not yet arrived.
mProgressTime = now - TimeDuration::Resolution();
if (mDataTime > mProgressTime) {
mDataTime = mProgressTime;
}
if (!mProgressTimer) {
NS_ASSERTION(aHaveNewProgress,
"timer dispatched when there was no timer");
// Were stalled. Restart timer.
StartProgressTimer();
if (!mLoadedDataFired) {
ChangeDelayLoadStatus(true);
}
}
// Download statistics may have been updated, force a recheck of the
// readyState.
UpdateReadyStateInternal();
}
if (now - mDataTime >= TimeDuration::FromMilliseconds(STALL_MS)) {
if (!mMediaSource) {
DispatchAsyncEvent(NS_LITERAL_STRING("stalled"));
} else {
ChangeDelayLoadStatus(false);
}
NS_ASSERTION(mProgressTimer, "detected stalled without timer");
// Stop timer events, which prevents repeated stalled events until there
// is more progress.
StopProgress();
}
AddRemoveSelfReference();
}
/* static */
void HTMLMediaElement::ProgressTimerCallback(nsITimer* aTimer, void* aClosure) {
auto decoder = static_cast<HTMLMediaElement*>(aClosure);
decoder->CheckProgress(false);
}
void HTMLMediaElement::StartProgressTimer() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mNetworkState == NETWORK_LOADING);
NS_ASSERTION(!mProgressTimer, "Already started progress timer.");
NS_NewTimerWithFuncCallback(
getter_AddRefs(mProgressTimer), ProgressTimerCallback, this, PROGRESS_MS,
nsITimer::TYPE_REPEATING_SLACK, "HTMLMediaElement::ProgressTimerCallback",
mMainThreadEventTarget);
}
void HTMLMediaElement::StartProgress() {
// Record the time now for detecting stalled.
mDataTime = TimeStamp::NowLoRes();
// Reset mProgressTime so that mDataTime is not indicating bytes received
// after the last progress event.
mProgressTime = TimeStamp();
StartProgressTimer();
}
void HTMLMediaElement::StopProgress() {
MOZ_ASSERT(NS_IsMainThread());
if (!mProgressTimer) {
return;
}
mProgressTimer->Cancel();
mProgressTimer = nullptr;
}
void HTMLMediaElement::DownloadProgressed() {
if (mNetworkState != NETWORK_LOADING) {
return;
}
CheckProgress(true);
}
bool HTMLMediaElement::ShouldCheckAllowOrigin() {
return mCORSMode != CORS_NONE;
}
bool HTMLMediaElement::IsCORSSameOrigin() {
bool subsumes;
RefPtr<nsIPrincipal> principal = GetCurrentPrincipal();
return (NS_SUCCEEDED(NodePrincipal()->Subsumes(principal, &subsumes)) &&
subsumes) ||
ShouldCheckAllowOrigin();
}
void HTMLMediaElement::UpdateReadyStateInternal() {
if (!mDecoder && !mSrcStream) {
// Not initialized - bail out.
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Not initialized",
this));
return;
}
if (mDecoder && mReadyState < HAVE_METADATA) {
// aNextFrame might have a next frame because the decoder can advance
// on its own thread before MetadataLoaded gets a chance to run.
// The arrival of more data can't change us out of this readyState.
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Decoder ready state < HAVE_METADATA",
this));
return;
}
if (mSrcStream && mReadyState < HAVE_METADATA) {
if (!mSrcStreamTracksAvailable) {
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"MediaStreamTracks not available yet",
this));
return;
}
bool hasAudioTracks = AudioTracks() && !AudioTracks()->IsEmpty();
bool hasVideoTracks = VideoTracks() && !VideoTracks()->IsEmpty();
if (!hasAudioTracks && !hasVideoTracks) {
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Stream with no tracks",
this));
// Give it one last chance to remove the self reference if needed.
AddRemoveSelfReference();
return;
}
if (IsVideo() && hasVideoTracks && !HasVideo()) {
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Stream waiting for video",
this));
return;
}
LOG(LogLevel::Debug,
("MediaElement %p UpdateReadyStateInternal() Stream has "
"metadata; audioTracks=%d, videoTracks=%d, "
"hasVideoFrame=%d",
this, AudioTracks()->Length(), VideoTracks()->Length(), HasVideo()));
// We are playing a stream that has video and a video frame is now set.
// This means we have all metadata needed to change ready state.
MediaInfo mediaInfo = mMediaInfo;
if (hasAudioTracks) {
mediaInfo.EnableAudio();
}
if (hasVideoTracks) {
mediaInfo.EnableVideo();
}
MetadataLoaded(&mediaInfo, nullptr);
}
if (mMediaSource) {
// readyState has changed, assuming it's following the pending mediasource
// operations. Notify the Mediasource that the operations have completed.
mMediaSource->CompletePendingTransactions();
}
enum NextFrameStatus nextFrameStatus = NextFrameStatus();
if (mWaitingForKey == NOT_WAITING_FOR_KEY) {
if (nextFrameStatus == NEXT_FRAME_UNAVAILABLE && mDecoder &&
!mDecoder->IsEnded()) {
nextFrameStatus = mDecoder->NextFrameBufferedStatus();
}
} else if (mWaitingForKey == WAITING_FOR_KEY) {
if (nextFrameStatus == NEXT_FRAME_UNAVAILABLE ||
nextFrameStatus == NEXT_FRAME_UNAVAILABLE_BUFFERING) {
// http://w3c.github.io/encrypted-media/#wait-for-key
// Continuing 7.3.4 Queue a "waitingforkey" Event
// 4. Queue a task to fire a simple event named waitingforkey
// at the media element.
// 5. Set the readyState of media element to HAVE_METADATA.
// NOTE: We'll change to HAVE_CURRENT_DATA or HAVE_METADATA
// depending on whether we've loaded the first frame or not
// below.
// 6. Suspend playback.
// Note: Playback will already be stalled, as the next frame is
// unavailable.
mWaitingForKey = WAITING_FOR_KEY_DISPATCHED;
DispatchAsyncEvent(NS_LITERAL_STRING("waitingforkey"));
}
} else {
MOZ_ASSERT(mWaitingForKey == WAITING_FOR_KEY_DISPATCHED);
if (nextFrameStatus == NEXT_FRAME_AVAILABLE) {
// We have new frames after dispatching "waitingforkey".
// This means we've got the key and can reset mWaitingForKey now.
mWaitingForKey = NOT_WAITING_FOR_KEY;
}
}
if (nextFrameStatus == MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE_SEEKING) {
LOG(LogLevel::Debug,
("MediaElement %p UpdateReadyStateInternal() "
"NEXT_FRAME_UNAVAILABLE_SEEKING; Forcing HAVE_METADATA",
this));
ChangeReadyState(HAVE_METADATA);
return;
}
if (IsVideo() && VideoTracks() && !VideoTracks()->IsEmpty() &&
!IsPlaybackEnded() && GetImageContainer() &&
!GetImageContainer()->HasCurrentImage()) {
// Don't advance if we are playing video, but don't have a video frame.
// Also, if video became available after advancing to HAVE_CURRENT_DATA
// while we are still playing, we need to revert to HAVE_METADATA until
// a video frame is available.
LOG(LogLevel::Debug,
("MediaElement %p UpdateReadyStateInternal() "
"Playing video but no video frame; Forcing HAVE_METADATA",
this));
ChangeReadyState(HAVE_METADATA);
return;
}
if (!mFirstFrameLoaded) {
// We haven't yet loaded the first frame, making us unable to determine
// if we have enough valid data at the present stage.
return;
}
if (nextFrameStatus == NEXT_FRAME_UNAVAILABLE_BUFFERING) {
// Force HAVE_CURRENT_DATA when buffering.
ChangeReadyState(HAVE_CURRENT_DATA);
return;
}
// TextTracks must be loaded for the HAVE_ENOUGH_DATA and
// HAVE_FUTURE_DATA.
// So force HAVE_CURRENT_DATA if text tracks not loaded.
if (mTextTrackManager && !mTextTrackManager->IsLoaded()) {
ChangeReadyState(HAVE_CURRENT_DATA);
return;
}
if (mDownloadSuspendedByCache && mDecoder && !mDecoder->IsEnded()) {
// The decoder has signaled that the download has been suspended by the
// media cache. So move readyState into HAVE_ENOUGH_DATA, in case there's
// script waiting for a "canplaythrough" event; without this forced
// transition, we will never fire the "canplaythrough" event if the
// media cache is too small, and scripts are bound to fail. Don't force
// this transition if the decoder is in ended state; the readyState
// should remain at HAVE_CURRENT_DATA in this case.
// Note that this state transition includes the case where we finished
// downloaded the whole data stream.
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Decoder download suspended by cache",
this));
ChangeReadyState(HAVE_ENOUGH_DATA);
return;
}
if (nextFrameStatus != MediaDecoderOwner::NEXT_FRAME_AVAILABLE) {
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Next frame not available",
this));
ChangeReadyState(HAVE_CURRENT_DATA);
return;
}
if (mSrcStream) {
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Stream HAVE_ENOUGH_DATA",
this));
ChangeReadyState(HAVE_ENOUGH_DATA);
return;
}
// Now see if we should set HAVE_ENOUGH_DATA.
// If it's something we don't know the size of, then we can't
// make a real estimate, so we go straight to HAVE_ENOUGH_DATA once
// we've downloaded enough data that our download rate is considered
// reliable. We have to move to HAVE_ENOUGH_DATA at some point or
// autoplay elements for live streams will never play. Otherwise we
// move to HAVE_ENOUGH_DATA if we can play through the entire media
// without stopping to buffer.
if (mDecoder->CanPlayThrough()) {
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Decoder can play through",
this));
ChangeReadyState(HAVE_ENOUGH_DATA);
return;
}
LOG(LogLevel::Debug, ("MediaElement %p UpdateReadyStateInternal() "
"Default; Decoder has future data",
this));
ChangeReadyState(HAVE_FUTURE_DATA);
}
static const char* const gReadyStateToString[] = {
"HAVE_NOTHING", "HAVE_METADATA", "HAVE_CURRENT_DATA", "HAVE_FUTURE_DATA",
"HAVE_ENOUGH_DATA"};
void HTMLMediaElement::ChangeReadyState(nsMediaReadyState aState) {
if (mReadyState == aState) {
return;
}
nsMediaReadyState oldState = mReadyState;
mReadyState = aState;
LOG(LogLevel::Debug,
("%p Ready state changed to %s", this, gReadyStateToString[aState]));
DDLOG(DDLogCategory::Property, "ready_state", gReadyStateToString[aState]);
// https://html.spec.whatwg.org/multipage/media.html#text-track-cue-active-flag
// The user agent must synchronously unset cues' active flag whenever the
// media element's readyState is changed back to HAVE_NOTHING.
if (mReadyState == HAVE_NOTHING && mTextTrackManager) {
mTextTrackManager->NotifyReset();
}
if (mNetworkState == NETWORK_EMPTY) {
return;
}
UpdateAudioChannelPlayingState();
// Handle raising of "waiting" event during seek (see 4.8.10.9)
// or
// 4.8.12.7 Ready states:
// "If the previous ready state was HAVE_FUTURE_DATA or more, and the new
// ready state is HAVE_CURRENT_DATA or less
// If the media element was potentially playing before its readyState
// attribute changed to a value lower than HAVE_FUTURE_DATA, and the element
// has not ended playback, and playback has not stopped due to errors,
// paused for user interaction, or paused for in-band content, the user agent
// must queue a task to fire a simple event named timeupdate at the element,
// and queue a task to fire a simple event named waiting at the element."
if (mPlayingBeforeSeek && mReadyState < HAVE_FUTURE_DATA) {
DispatchAsyncEvent(NS_LITERAL_STRING("waiting"));
} else if (oldState >= HAVE_FUTURE_DATA && mReadyState < HAVE_FUTURE_DATA &&
!Paused() && !Ended() && !mErrorSink->mError) {
FireTimeUpdate(false);
DispatchAsyncEvent(NS_LITERAL_STRING("waiting"));
}
if (oldState < HAVE_CURRENT_DATA && mReadyState >= HAVE_CURRENT_DATA &&
!mLoadedDataFired) {
DispatchAsyncEvent(NS_LITERAL_STRING("loadeddata"));
mLoadedDataFired = true;
}
if (oldState < HAVE_FUTURE_DATA && mReadyState >= HAVE_FUTURE_DATA) {
DispatchAsyncEvent(NS_LITERAL_STRING("canplay"));
if (!mPaused) {
if (mDecoder && !mPausedForInactiveDocumentOrChannel) {
MOZ_ASSERT(AutoplayPolicy::IsAllowedToPlay(*this));
mDecoder->Play();
}
NotifyAboutPlaying();
}
}
CheckAutoplayDataReady();
if (oldState < HAVE_ENOUGH_DATA && mReadyState >= HAVE_ENOUGH_DATA) {
DispatchAsyncEvent(NS_LITERAL_STRING("canplaythrough"));
}
}
static const char* const gNetworkStateToString[] = {"EMPTY", "IDLE", "LOADING",
"NO_SOURCE"};
void HTMLMediaElement::ChangeNetworkState(nsMediaNetworkState aState) {
if (mNetworkState == aState) {
return;
}
nsMediaNetworkState oldState = mNetworkState;
mNetworkState = aState;
LOG(LogLevel::Debug,
("%p Network state changed to %s", this, gNetworkStateToString[aState]));
DDLOG(DDLogCategory::Property, "network_state",
gNetworkStateToString[aState]);
if (oldState == NETWORK_LOADING) {
// Stop progress notification when exiting NETWORK_LOADING.
StopProgress();
}
if (mNetworkState == NETWORK_LOADING) {
// Start progress notification when entering NETWORK_LOADING.
StartProgress();
} else if (mNetworkState == NETWORK_IDLE && !mErrorSink->mError) {
// Fire 'suspend' event when entering NETWORK_IDLE and no error presented.
DispatchAsyncEvent(NS_LITERAL_STRING("suspend"));
}
// According to the resource selection (step2, step9-18), dedicated media
// source failure step (step4) and aborting existing load (step4), set show
// poster flag to true. https://html.spec.whatwg.org/multipage/media.html
if (mNetworkState == NETWORK_NO_SOURCE || mNetworkState == NETWORK_EMPTY) {
mShowPoster = true;
}
// Changing mNetworkState affects AddRemoveSelfReference().
AddRemoveSelfReference();
}
bool HTMLMediaElement::CanActivateAutoplay() {
// We also activate autoplay when playing a media source since the data
// download is controlled by the script and there is no way to evaluate
// MediaDecoder::CanPlayThrough().
if (!HasAttr(kNameSpaceID_None, nsGkAtoms::autoplay)) {
return false;
}
if (!mAutoplaying) {
return false;
}
if (IsEditable()) {
return false;
}
if (!mPaused) {
return false;
}
if (mPausedForInactiveDocumentOrChannel) {
return false;
}
// Static document is used for print preview and printing, should not be
// autoplay
if (OwnerDoc()->IsStaticDocument()) {
return false;
}
if (mAudioChannelWrapper) {
// Note: SUSPENDED_PAUSE and SUSPENDED_BLOCK will be merged into one single
// state.
if (mAudioChannelWrapper->GetSuspendType() ==
nsISuspendedTypes::SUSPENDED_PAUSE ||
mAudioChannelWrapper->GetSuspendType() ==
nsISuspendedTypes::SUSPENDED_BLOCK ||
mAudioChannelWrapper->IsPlaybackBlocked()) {
return false;
}
}
return mReadyState >= HAVE_ENOUGH_DATA;
}
void HTMLMediaElement::CheckAutoplayDataReady() {
if (!CanActivateAutoplay()) {
return;
}
UpdateHadAudibleAutoplayState();
if (!AutoplayPolicy::IsAllowedToPlay(*this)) {
DispatchEventsWhenPlayWasNotAllowed();
return;
}
mAllowedToPlayPromise.ResolveIfExists(true, __func__);
mPaused = false;
// We changed mPaused which can affect AddRemoveSelfReference
AddRemoveSelfReference();
UpdateSrcMediaStreamPlaying();
UpdateAudioChannelPlayingState();
if (mDecoder) {
SetPlayedOrSeeked(true);
if (mCurrentPlayRangeStart == -1.0) {
mCurrentPlayRangeStart = CurrentTime();
}
MOZ_ASSERT(!mPausedForInactiveDocumentOrChannel);
mDecoder->Play();
} else if (mSrcStream) {
SetPlayedOrSeeked(true);
}
// https://html.spec.whatwg.org/multipage/media.html#ready-states:show-poster-flag
if (mShowPoster) {
mShowPoster = false;
if (mTextTrackManager) {
mTextTrackManager->TimeMarchesOn();
}
}
// For blocked media, the event would be pending until it is resumed.
DispatchAsyncEvent(NS_LITERAL_STRING("play"));
DispatchAsyncEvent(NS_LITERAL_STRING("playing"));
}
bool HTMLMediaElement::IsActive() const {
Document* ownerDoc = OwnerDoc();
return ownerDoc && ownerDoc->IsActive() && ownerDoc->IsVisible();
}
bool HTMLMediaElement::IsHidden() const {
return !IsInComposedDoc() || OwnerDoc()->Hidden();
}
VideoFrameContainer* HTMLMediaElement::GetVideoFrameContainer() {
if (mShuttingDown) {
return nullptr;
}
if (mVideoFrameContainer) return mVideoFrameContainer;
// Only video frames need an image container.
if (!IsVideo()) {
return nullptr;
}
mVideoFrameContainer = new VideoFrameContainer(
this, LayerManager::CreateImageContainer(ImageContainer::ASYNCHRONOUS));
return mVideoFrameContainer;
}
void HTMLMediaElement::PrincipalChanged(DOMMediaStream* aStream) {
LOG(LogLevel::Info, ("HTMLMediaElement %p Stream principal changed.", this));
nsContentUtils::CombineResourcePrincipals(&mSrcStreamVideoPrincipal,
aStream->GetVideoPrincipal());
LOG(LogLevel::Debug,
("HTMLMediaElement %p Stream video principal changed to "
"%p. Waiting for it to reach VideoFrameContainer before "
"setting.",
this, aStream->GetVideoPrincipal()));
if (mVideoFrameContainer) {
UpdateSrcStreamVideoPrincipal(
mVideoFrameContainer->GetLastPrincipalHandle());
}
}
void HTMLMediaElement::UpdateSrcStreamVideoPrincipal(
const PrincipalHandle& aPrincipalHandle) {
nsTArray<RefPtr<VideoStreamTrack>> videoTracks;
mSrcStream->GetVideoTracks(videoTracks);
PrincipalHandle handle(aPrincipalHandle);
bool matchesTrackPrincipal = false;
for (const RefPtr<VideoStreamTrack>& track : videoTracks) {
if (PrincipalHandleMatches(handle, track->GetPrincipal()) &&
!track->Ended()) {
// When the PrincipalHandle for the VideoFrameContainer changes to that of
// a track in mSrcStream we know that a removed track was displayed but
// is no longer so.
matchesTrackPrincipal = true;
LOG(LogLevel::Debug, ("HTMLMediaElement %p VideoFrameContainer's "
"PrincipalHandle matches track %p. That's all we "
"need.",
this, track.get()));
break;
}
}
if (matchesTrackPrincipal) {
mSrcStreamVideoPrincipal = mSrcStream->GetVideoPrincipal();
}
}
void HTMLMediaElement::PrincipalHandleChangedForVideoFrameContainer(
VideoFrameContainer* aContainer,
const PrincipalHandle& aNewPrincipalHandle) {
MOZ_ASSERT(NS_IsMainThread());
if (!mSrcStream) {
return;
}
LOG(LogLevel::Debug, ("HTMLMediaElement %p PrincipalHandle changed in "
"VideoFrameContainer.",
this));
UpdateSrcStreamVideoPrincipal(aNewPrincipalHandle);
}
nsresult HTMLMediaElement::DispatchEvent(const nsAString& aName) {
LOG_EVENT(LogLevel::Debug, ("%p Dispatching event %s", this,
NS_ConvertUTF16toUTF8(aName).get()));
// Save events that occur while in the bfcache. These will be dispatched
// if the page comes out of the bfcache.
if (mEventDeliveryPaused) {
mPendingEvents.AppendElement(aName);
return NS_OK;
}
return nsContentUtils::DispatchTrustedEvent(
OwnerDoc(), static_cast<nsIContent*>(this), aName, CanBubble::eNo,
Cancelable::eNo);
}
void HTMLMediaElement::DispatchAsyncEvent(const nsAString& aName) {
LOG_EVENT(LogLevel::Debug,
("%p Queuing event %s", this, NS_ConvertUTF16toUTF8(aName).get()));
DDLOG(DDLogCategory::Event, "HTMLMediaElement",
nsCString(NS_ConvertUTF16toUTF8(aName)));
// Save events that occur while in the bfcache. These will be dispatched
// if the page comes out of the bfcache.
if (mEventDeliveryPaused) {
mPendingEvents.AppendElement(aName);
return;
}
nsCOMPtr<nsIRunnable> event;
if (aName.EqualsLiteral("playing")) {
event = new nsNotifyAboutPlayingRunner(this, TakePendingPlayPromises());
} else {
event = new nsAsyncEventRunner(aName, this);
}
mMainThreadEventTarget->Dispatch(event.forget());
if ((aName.EqualsLiteral("play") || aName.EqualsLiteral("playing"))) {
mPlayTime.Start();
mCurrentLoadPlayTime.Start();
if (IsHidden()) {
HiddenVideoStart();
}
} else if (aName.EqualsLiteral("waiting")) {
mPlayTime.Pause();
mCurrentLoadPlayTime.Pause();
HiddenVideoStop();
} else if (aName.EqualsLiteral("pause")) {
mPlayTime.Pause();
mCurrentLoadPlayTime.Pause();
HiddenVideoStop();
}
// It would happen when (1) media aborts current load (2) media pauses (3)
// media end (4) media unbind from tree (because we would pause it)
if (aName.EqualsLiteral("pause")) {
ReportPlayedTimeAfterBlockedTelemetry();
}
}
nsresult HTMLMediaElement::DispatchPendingMediaEvents() {
NS_ASSERTION(!mEventDeliveryPaused,
"Must not be in bfcache when dispatching pending media events");
uint32_t count = mPendingEvents.Length();
for (uint32_t i = 0; i < count; ++i) {
DispatchAsyncEvent(mPendingEvents[i]);
}
mPendingEvents.Clear();
return NS_OK;
}
bool HTMLMediaElement::IsPotentiallyPlaying() const {
// TODO:
// playback has not stopped due to errors,
// and the element has not paused for user interaction
return !mPaused &&
(mReadyState == HAVE_ENOUGH_DATA || mReadyState == HAVE_FUTURE_DATA) &&
!IsPlaybackEnded();
}
bool HTMLMediaElement::IsPlaybackEnded() const {
// TODO:
// the current playback position is equal to the effective end of the media
// resource. See bug 449157.
if (mDecoder) {
return mReadyState >= HAVE_METADATA && mDecoder->IsEnded();
} else if (mSrcStream) {
return mReadyState >= HAVE_METADATA && mSrcStreamPlaybackEnded;
} else {
return false;
}
}
already_AddRefed<nsIPrincipal> HTMLMediaElement::GetCurrentPrincipal() {
if (mDecoder) {
return mDecoder->GetCurrentPrincipal();
}
if (mSrcStream) {
nsCOMPtr<nsIPrincipal> principal = mSrcStream->GetPrincipal();
return principal.forget();
}
return nullptr;
}
bool HTMLMediaElement::HadCrossOriginRedirects() {
if (mDecoder) {
return mDecoder->HadCrossOriginRedirects();
}
return false;
}
already_AddRefed<nsIPrincipal> HTMLMediaElement::GetCurrentVideoPrincipal() {
if (mDecoder) {
return mDecoder->GetCurrentPrincipal();
}
if (mSrcStream) {
nsCOMPtr<nsIPrincipal> principal = mSrcStreamVideoPrincipal;
return principal.forget();
}
return nullptr;
}
void HTMLMediaElement::NotifyDecoderPrincipalChanged() {
RefPtr<nsIPrincipal> principal = GetCurrentPrincipal();
bool isSameOrigin = !principal || IsCORSSameOrigin();
mDecoder->UpdateSameOriginStatus(isSameOrigin);
mDecoder->SetOutputStreamPrincipal(isSameOrigin ? NodePrincipal()
: principal.get());
}
void HTMLMediaElement::Invalidate(bool aImageSizeChanged,
Maybe<nsIntSize>& aNewIntrinsicSize,
bool aForceInvalidate) {
nsIFrame* frame = GetPrimaryFrame();
if (aNewIntrinsicSize) {
UpdateMediaSize(aNewIntrinsicSize.value());
if (frame) {
nsPresContext* presContext = frame->PresContext();
PresShell* presShell = presContext->PresShell();
presShell->FrameNeedsReflow(frame, IntrinsicDirty::StyleChange,
NS_FRAME_IS_DIRTY);
}
}
RefPtr<ImageContainer> imageContainer = GetImageContainer();
bool asyncInvalidate =
imageContainer && imageContainer->IsAsync() && !aForceInvalidate;
if (frame) {
if (aImageSizeChanged) {
frame->InvalidateFrame();
} else {
frame->InvalidateLayer(DisplayItemType::TYPE_VIDEO, nullptr, nullptr,
asyncInvalidate ? nsIFrame::UPDATE_IS_ASYNC : 0);
}
}
SVGObserverUtils::InvalidateDirectRenderingObservers(this);
}
void HTMLMediaElement::UpdateMediaSize(const nsIntSize& aSize) {
MOZ_ASSERT(NS_IsMainThread());
if (IsVideo() && mReadyState != HAVE_NOTHING &&
mMediaInfo.mVideo.mDisplay != aSize) {
DispatchAsyncEvent(NS_LITERAL_STRING("resize"));
}
mMediaInfo.mVideo.mDisplay = aSize;
UpdateReadyStateInternal();
if (mFirstFrameListener) {
mSelectedVideoStreamTrack->RemoveVideoOutput(mFirstFrameListener);
// The first-frame listener won't be needed again for this stream.
mFirstFrameListener = nullptr;
}
}
void HTMLMediaElement::SuspendOrResumeElement(bool aPauseElement,
bool aSuspendEvents) {
LOG(LogLevel::Debug,
("%p SuspendOrResumeElement(pause=%d, suspendEvents=%d) hidden=%d", this,
aPauseElement, aSuspendEvents, OwnerDoc()->Hidden()));
if (aPauseElement != mPausedForInactiveDocumentOrChannel) {
mPausedForInactiveDocumentOrChannel = aPauseElement;
UpdateSrcMediaStreamPlaying();
UpdateAudioChannelPlayingState();
if (aPauseElement) {
mCurrentLoadPlayTime.Pause();
ReportTelemetry();
// For EME content, we may force destruction of the CDM client (and CDM
// instance if this is the last client for that CDM instance) and
// the CDM's decoder. This ensures the CDM gets reliable and prompt
// shutdown notifications, as it may have book-keeping it needs
// to do on shutdown.
if (mMediaKeys) {
nsAutoString keySystem;
mMediaKeys->GetKeySystem(keySystem);
}
if (mDecoder) {
mDecoder->Pause();
mDecoder->Suspend();
}
mEventDeliveryPaused = aSuspendEvents;
} else {
if (!mPaused) {
mCurrentLoadPlayTime.Start();
}
if (mDecoder) {
mDecoder->Resume();
if (!mPaused && !mDecoder->IsEnded()) {
mDecoder->Play();
}
}
if (mEventDeliveryPaused) {
mEventDeliveryPaused = false;
DispatchPendingMediaEvents();
}
// If the media element has been blocked and isn't still allowed to play
// when it comes back from the bfcache, we would notify front end to show
// the blocking icon in order to inform user that the site is still being
// blocked.
if (mHasEverBeenBlockedForAutoplay &&
!AutoplayPolicy::IsAllowedToPlay(*this)) {
OwnerDoc()->MaybeNotifyAutoplayBlocked();
}
}
}
}
bool HTMLMediaElement::IsBeingDestroyed() {
Document* ownerDoc = OwnerDoc();
nsIDocShell* docShell = ownerDoc ? ownerDoc->GetDocShell() : nullptr;
bool isBeingDestroyed = false;
if (docShell) {
docShell->IsBeingDestroyed(&isBeingDestroyed);
}
return isBeingDestroyed;
}
void HTMLMediaElement::NotifyOwnerDocumentActivityChanged() {
bool visible = !IsHidden();
if (visible) {
// Visible -> Just pause hidden play time (no-op if already paused).
HiddenVideoStop();
} else if (mPlayTime.IsStarted()) {
// Not visible, play time is running -> Start hidden play time if needed.
HiddenVideoStart();
}
if (mDecoder && !IsBeingDestroyed()) {
NotifyDecoderActivityChanges();
}
bool pauseElement = ShouldElementBePaused();
SuspendOrResumeElement(pauseElement, !IsActive());
// If the owning document has become inactive we should shutdown the CDM.
if (!OwnerDoc()->IsCurrentActiveDocument() && mMediaKeys) {
// We don't shutdown MediaKeys here because it also listens for document
// activity and will take care of shutting down itself.
DDUNLINKCHILD(mMediaKeys.get());
mMediaKeys = nullptr;
if (mDecoder) {
ShutdownDecoder();
}
}
AddRemoveSelfReference();
}
void HTMLMediaElement::AddRemoveSelfReference() {
// XXX we could release earlier here in many situations if we examined
// which event listeners are attached. Right now we assume there is a
// potential listener for every event. We would also have to keep the
// element alive if it was playing and producing audio output --- right now
// that's covered by the !mPaused check.
Document* ownerDoc = OwnerDoc();
// See the comment at the top of this file for the explanation of this
// boolean expression.
bool needSelfReference =
!mShuttingDown && ownerDoc->IsActive() &&
(mDelayingLoadEvent || (!mPaused && !Ended()) ||
(mDecoder && mDecoder->IsSeeking()) || CanActivateAutoplay() ||
(mMediaSource ? mProgressTimer : mNetworkState == NETWORK_LOADING));
if (needSelfReference != mHasSelfReference) {
mHasSelfReference = needSelfReference;
RefPtr<HTMLMediaElement> self = this;
if (needSelfReference) {
// The shutdown observer will hold a strong reference to us. This
// will do to keep us alive. We need to know about shutdown so that
// we can release our self-reference.
mMainThreadEventTarget->Dispatch(NS_NewRunnableFunction(
"dom::HTMLMediaElement::AddSelfReference",
[self]() { self->mShutdownObserver->AddRefMediaElement(); }));
} else {
// Dispatch Release asynchronously so that we don't destroy this object
// inside a call stack of method calls on this object
mMainThreadEventTarget->Dispatch(NS_NewRunnableFunction(
"dom::HTMLMediaElement::AddSelfReference",
[self]() { self->mShutdownObserver->ReleaseMediaElement(); }));
}
}
}
void HTMLMediaElement::NotifyShutdownEvent() {
mShuttingDown = true;
ResetState();
AddRemoveSelfReference();
}
void HTMLMediaElement::DispatchAsyncSourceError(nsIContent* aSourceElement) {
LOG_EVENT(LogLevel::Debug, ("%p Queuing simple source error event", this));
nsCOMPtr<nsIRunnable> event =
new nsSourceErrorEventRunner(this, aSourceElement);
mMainThreadEventTarget->Dispatch(event.forget());
}
void HTMLMediaElement::NotifyAddedSource() {
// If a source element is inserted as a child of a media element
// that has no src attribute and whose networkState has the value
// NETWORK_EMPTY, the user agent must invoke the media element's
// resource selection algorithm.
if (!HasAttr(kNameSpaceID_None, nsGkAtoms::src) &&
mNetworkState == NETWORK_EMPTY) {
AssertReadyStateIsNothing();
QueueSelectResourceTask();
}
// A load was paused in the resource selection algorithm, waiting for
// a new source child to be added, resume the resource selection algorithm.
if (mLoadWaitStatus == WAITING_FOR_SOURCE) {
// Rest the flag so we don't queue multiple LoadFromSourceTask() when
// multiple <source> are attached in an event loop.
mLoadWaitStatus = NOT_WAITING;
QueueLoadFromSourceTask();
}
}
Element* HTMLMediaElement::GetNextSource() {
mSourceLoadCandidate = nullptr;
while (true) {
if (mSourcePointer == nsINode::GetLastChild()) {
return nullptr; // no more children
}
if (!mSourcePointer) {
mSourcePointer = nsINode::GetFirstChild();
} else {
mSourcePointer = mSourcePointer->GetNextSibling();
}
nsIContent* child = mSourcePointer;
// If child is a <source> element, it is the next candidate.
if (child && child->IsHTMLElement(nsGkAtoms::source)) {
mSourceLoadCandidate = child;
return child->AsElement();
}
}
MOZ_ASSERT_UNREACHABLE("Execution should not reach here!");
return nullptr;
}
void HTMLMediaElement::ChangeDelayLoadStatus(bool aDelay) {
if (mDelayingLoadEvent == aDelay) return;
mDelayingLoadEvent = aDelay;
LOG(LogLevel::Debug, ("%p ChangeDelayLoadStatus(%d) doc=0x%p", this, aDelay,
mLoadBlockedDoc.get()));
if (mDecoder) {
mDecoder->SetLoadInBackground(!aDelay);
}
if (aDelay) {
mLoadBlockedDoc = OwnerDoc();
mLoadBlockedDoc->BlockOnload();
} else {
// mLoadBlockedDoc might be null due to GC unlinking
if (mLoadBlockedDoc) {
mLoadBlockedDoc->UnblockOnload(false);
mLoadBlockedDoc = nullptr;
}
}
// We changed mDelayingLoadEvent which can affect AddRemoveSelfReference
AddRemoveSelfReference();
}
already_AddRefed<nsILoadGroup> HTMLMediaElement::GetDocumentLoadGroup() {
if (!OwnerDoc()->IsActive()) {
NS_WARNING("Load group requested for media element in inactive document.");
}
return OwnerDoc()->GetDocumentLoadGroup();
}
nsresult HTMLMediaElement::CopyInnerTo(Element* aDest) {
nsresult rv = nsGenericHTMLElement::CopyInnerTo(aDest);
NS_ENSURE_SUCCESS(rv, rv);
if (aDest->OwnerDoc()->IsStaticDocument()) {
HTMLMediaElement* dest = static_cast<HTMLMediaElement*>(aDest);
dest->SetMediaInfo(mMediaInfo);
}
return rv;
}
already_AddRefed<TimeRanges> HTMLMediaElement::Buffered() const {
media::TimeIntervals buffered =
mDecoder ? mDecoder->GetBuffered() : media::TimeIntervals();
RefPtr<TimeRanges> ranges = new TimeRanges(ToSupports(OwnerDoc()), buffered);
return ranges.forget();
}
void HTMLMediaElement::SetRequestHeaders(nsIHttpChannel* aChannel) {
// Send Accept header for video and audio types only (Bug 489071)
SetAcceptHeader(aChannel);
// Apache doesn't send Content-Length when gzip transfer encoding is used,
// which prevents us from estimating the video length (if explicit
// Content-Duration and a length spec in the container are not present either)
// and from seeking. So, disable the standard "Accept-Encoding: gzip,deflate"
// that we usually send. See bug 614760.
DebugOnly<nsresult> rv = aChannel->SetRequestHeader(
NS_LITERAL_CSTRING("Accept-Encoding"), EmptyCString(), false);
MOZ_ASSERT(NS_SUCCEEDED(rv));
// Set the Referer header
nsCOMPtr<nsIReferrerInfo> referrerInfo = new ReferrerInfo();
referrerInfo->InitWithDocument(OwnerDoc());
rv = aChannel->SetReferrerInfoWithoutClone(referrerInfo);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
void HTMLMediaElement::FireTimeUpdate(bool aPeriodic) {
NS_ASSERTION(NS_IsMainThread(), "Should be on main thread.");
TimeStamp now = TimeStamp::Now();
double time = CurrentTime();
// Fire a timeupdate event if this is not a periodic update (i.e. it's a
// timeupdate event mandated by the spec), or if it's a periodic update
// and TIMEUPDATE_MS has passed since the last timeupdate event fired and
// the time has changed.
if (!aPeriodic || (mLastCurrentTime != time &&
(mTimeUpdateTime.IsNull() ||
now - mTimeUpdateTime >=
TimeDuration::FromMilliseconds(TIMEUPDATE_MS)))) {
DispatchAsyncEvent(NS_LITERAL_STRING("timeupdate"));
mTimeUpdateTime = now;
mLastCurrentTime = time;
}
if (mFragmentEnd >= 0.0 && time >= mFragmentEnd) {
Pause();
mFragmentEnd = -1.0;
mFragmentStart = -1.0;
mDecoder->SetFragmentEndTime(mFragmentEnd);
}
// Update the cues displaying on the video.
// Here mTextTrackManager can be null if the cycle collector has unlinked
// us before our parent. In that case UnbindFromTree will call us
// when our parent is unlinked.
if (mTextTrackManager) {
mTextTrackManager->TimeMarchesOn();
}
}
MediaStream* HTMLMediaElement::GetSrcMediaStream() const {
if (!mSrcStream) {
return nullptr;
}
return mSrcStream->GetPlaybackStream();
}
MediaError* HTMLMediaElement::GetError() const { return mErrorSink->mError; }
void HTMLMediaElement::GetCurrentSpec(nsCString& aString) {
if (mLoadingSrc) {
mLoadingSrc->GetSpec(aString);
} else {
aString.Truncate();
}
}
double HTMLMediaElement::MozFragmentEnd() {
double duration = Duration();
// If there is no end fragment, or the fragment end is greater than the
// duration, return the duration.
return (mFragmentEnd < 0.0 || mFragmentEnd > duration) ? duration
: mFragmentEnd;
}
void HTMLMediaElement::SetDefaultPlaybackRate(double aDefaultPlaybackRate,
ErrorResult& aRv) {
if (mSrcAttrStream) {
return;
}
if (aDefaultPlaybackRate < 0) {
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
return;
}
double defaultPlaybackRate = ClampPlaybackRate(aDefaultPlaybackRate);
if (mDefaultPlaybackRate == defaultPlaybackRate) {
return;
}
mDefaultPlaybackRate = defaultPlaybackRate;
DispatchAsyncEvent(NS_LITERAL_STRING("ratechange"));
}
void HTMLMediaElement::SetPlaybackRate(double aPlaybackRate, ErrorResult& aRv) {
if (mSrcAttrStream) {
return;
}
// Changing the playback rate of a media that has more than two channels is
// not supported.
if (aPlaybackRate < 0) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
if (mPlaybackRate == aPlaybackRate) {
return;
}
mPlaybackRate = aPlaybackRate;
if (mPlaybackRate != 0.0 &&
(mPlaybackRate > THRESHOLD_HIGH_PLAYBACKRATE_AUDIO ||
mPlaybackRate < THRESHOLD_LOW_PLAYBACKRATE_AUDIO)) {
SetMutedInternal(mMuted | MUTED_BY_INVALID_PLAYBACK_RATE);
} else {
SetMutedInternal(mMuted & ~MUTED_BY_INVALID_PLAYBACK_RATE);
}
if (mDecoder) {
mDecoder->SetPlaybackRate(ClampPlaybackRate(mPlaybackRate));
}
DispatchAsyncEvent(NS_LITERAL_STRING("ratechange"));
}
void HTMLMediaElement::SetMozPreservesPitch(bool aPreservesPitch) {
mPreservesPitch = aPreservesPitch;
if (mDecoder) {
mDecoder->SetPreservesPitch(mPreservesPitch);
}
}
ImageContainer* HTMLMediaElement::GetImageContainer() {
VideoFrameContainer* container = GetVideoFrameContainer();
return container ? container->GetImageContainer() : nullptr;
}
void HTMLMediaElement::UpdateAudioChannelPlayingState(bool aForcePlaying) {
if (mAudioChannelWrapper) {
mAudioChannelWrapper->UpdateAudioChannelPlayingState(aForcePlaying);
}
}
bool HTMLMediaElement::AudioChannelAgentBlockedPlay() {
if (!mAudioChannelWrapper) {
// If the mAudioChannelWrapper doesn't exist that means the CC happened.
LOG(LogLevel::Debug,
("%p AudioChannelAgentBlockedPlay() returning true due to null "
"AudioChannelAgent.",
this));
return true;
}
// Note: SUSPENDED_PAUSE and SUSPENDED_BLOCK will be merged into one single
// state.
const auto suspendType = mAudioChannelWrapper->GetSuspendType();
return suspendType == nsISuspendedTypes::SUSPENDED_PAUSE ||
suspendType == nsISuspendedTypes::SUSPENDED_BLOCK;
}
static const char* VisibilityString(Visibility aVisibility) {
switch (aVisibility) {
case Visibility::Untracked: {
return "Untracked";
}
case Visibility::ApproximatelyNonVisible: {
return "ApproximatelyNonVisible";
}
case Visibility::ApproximatelyVisible: {
return "ApproximatelyVisible";
}
}
return "NAN";
}
void HTMLMediaElement::OnVisibilityChange(Visibility aNewVisibility) {
LOG(LogLevel::Debug,
("OnVisibilityChange(): %s\n", VisibilityString(aNewVisibility)));
mVisibilityState = aNewVisibility;
if (StaticPrefs::media_test_video_suspend()) {
DispatchAsyncEvent(NS_LITERAL_STRING("visibilitychanged"));
}
if (!mDecoder) {
return;
}
switch (aNewVisibility) {
case Visibility::Untracked: {
MOZ_ASSERT_UNREACHABLE("Shouldn't notify for untracked visibility");
return;
}
case Visibility::ApproximatelyNonVisible: {
if (mPlayTime.IsStarted()) {
// Not visible, play time is running -> Start hidden play time if
// needed.
HiddenVideoStart();
}
break;
}
case Visibility::ApproximatelyVisible: {
// Visible -> Just pause hidden play time (no-op if already paused).
HiddenVideoStop();
break;
}
}
NotifyDecoderActivityChanges();
}
MediaKeys* HTMLMediaElement::GetMediaKeys() const { return mMediaKeys; }
bool HTMLMediaElement::ContainsRestrictedContent() {
return GetMediaKeys() != nullptr;
}
void HTMLMediaElement::SetCDMProxyFailure(const MediaResult& aResult) {
LOG(LogLevel::Debug, ("%s", __func__));
MOZ_ASSERT(mSetMediaKeysDOMPromise);
ResetSetMediaKeysTempVariables();
mSetMediaKeysDOMPromise->MaybeReject(aResult.Code(), aResult.Message());
}
void HTMLMediaElement::RemoveMediaKeys() {
LOG(LogLevel::Debug, ("%s", __func__));
// 5.2.3 Stop using the CDM instance represented by the mediaKeys attribute
// to decrypt media data and remove the association with the media element.
if (mMediaKeys) {
mMediaKeys->Unbind();
}
mMediaKeys = nullptr;
}
bool HTMLMediaElement::TryRemoveMediaKeysAssociation() {
MOZ_ASSERT(mMediaKeys);
LOG(LogLevel::Debug, ("%s", __func__));
// 5.2.1 If the user agent or CDM do not support removing the association,
// let this object's attaching media keys value be false and reject promise
// with a new DOMException whose name is NotSupportedError.
// 5.2.2 If the association cannot currently be removed, let this object's
// attaching media keys value be false and reject promise with a new
// DOMException whose name is InvalidStateError.
if (mDecoder) {
RefPtr<HTMLMediaElement> self = this;
mDecoder->SetCDMProxy(nullptr)
->Then(
mAbstractMainThread, __func__,
[self]() {
self->mSetCDMRequest.Complete();
self->RemoveMediaKeys();
if (self->AttachNewMediaKeys()) {
// No incoming MediaKeys object or MediaDecoder is not
// created yet.
self->MakeAssociationWithCDMResolved();
}
},
[self](const MediaResult& aResult) {
self->mSetCDMRequest.Complete();
// 5.2.4 If the preceding step failed, let this object's
// attaching media keys value be false and reject promise with
// a new DOMException whose name is the appropriate error name.
self->SetCDMProxyFailure(aResult);
})
->Track(mSetCDMRequest);
return false;
}
RemoveMediaKeys();
return true;
}
bool HTMLMediaElement::DetachExistingMediaKeys() {
LOG(LogLevel::Debug, ("%s", __func__));
MOZ_ASSERT(mSetMediaKeysDOMPromise);
// 5.1 If mediaKeys is not null, CDM instance represented by mediaKeys is
// already in use by another media element, and the user agent is unable
// to use it with this element, let this object's attaching media keys
// value be false and reject promise with a new DOMException whose name
// is QuotaExceededError.
if (mIncomingMediaKeys && mIncomingMediaKeys->IsBoundToMediaElement()) {
SetCDMProxyFailure(MediaResult(
NS_ERROR_DOM_QUOTA_EXCEEDED_ERR,
"MediaKeys object is already bound to another HTMLMediaElement"));
return false;
}
// 5.2 If the mediaKeys attribute is not null, run the following steps:
if (mMediaKeys) {
return TryRemoveMediaKeysAssociation();
}
return true;
}
void HTMLMediaElement::MakeAssociationWithCDMResolved() {
LOG(LogLevel::Debug, ("%s", __func__));
MOZ_ASSERT(mSetMediaKeysDOMPromise);
// 5.4 Set the mediaKeys attribute to mediaKeys.
mMediaKeys = mIncomingMediaKeys;
// 5.5 Let this object's attaching media keys value be false.
ResetSetMediaKeysTempVariables();
// 5.6 Resolve promise.
mSetMediaKeysDOMPromise->MaybeResolveWithUndefined();
mSetMediaKeysDOMPromise = nullptr;
}
bool HTMLMediaElement::TryMakeAssociationWithCDM(CDMProxy* aProxy) {
LOG(LogLevel::Debug, ("%s", __func__));
MOZ_ASSERT(aProxy);
// 5.3.3 Queue a task to run the "Attempt to Resume Playback If Necessary"
// algorithm on the media element.
// Note: Setting the CDMProxy on the MediaDecoder will unblock playback.
if (mDecoder) {
// CDMProxy is set asynchronously in MediaFormatReader, once it's done,
// HTMLMediaElement should resolve or reject the DOM promise.
RefPtr<HTMLMediaElement> self = this;
mDecoder->SetCDMProxy(aProxy)
->Then(
mAbstractMainThread, __func__,
[self]() {
self->mSetCDMRequest.Complete();
self->MakeAssociationWithCDMResolved();
},
[self](const MediaResult& aResult) {
self->mSetCDMRequest.Complete();
self->SetCDMProxyFailure(aResult);
})
->Track(mSetCDMRequest);
return false;
}
return true;
}
bool HTMLMediaElement::AttachNewMediaKeys() {
LOG(LogLevel::Debug,
("%s incoming MediaKeys(%p)", __func__, mIncomingMediaKeys.get()));
MOZ_ASSERT(mSetMediaKeysDOMPromise);
// 5.3. If mediaKeys is not null, run the following steps:
if (mIncomingMediaKeys) {
auto cdmProxy = mIncomingMediaKeys->GetCDMProxy();
if (!cdmProxy) {
SetCDMProxyFailure(MediaResult(
NS_ERROR_DOM_INVALID_STATE_ERR,
"CDM crashed before binding MediaKeys object to HTMLMediaElement"));
return false;
}
// 5.3.1 Associate the CDM instance represented by mediaKeys with the
// media element for decrypting media data.
if (NS_FAILED(mIncomingMediaKeys->Bind(this))) {
// 5.3.2 If the preceding step failed, run the following steps:
// 5.3.2.1 Set the mediaKeys attribute to null.
mMediaKeys = nullptr;
// 5.3.2.2 Let this object's attaching media keys value be false.
// 5.3.2.3 Reject promise with a new DOMException whose name is
// the appropriate error name.
SetCDMProxyFailure(
MediaResult(NS_ERROR_DOM_INVALID_STATE_ERR,
"Failed to bind MediaKeys object to HTMLMediaElement"));
return false;
}
return TryMakeAssociationWithCDM(cdmProxy);
}
return true;
}
void HTMLMediaElement::ResetSetMediaKeysTempVariables() {
mAttachingMediaKey = false;
mIncomingMediaKeys = nullptr;
}
already_AddRefed<Promise> HTMLMediaElement::SetMediaKeys(
mozilla::dom::MediaKeys* aMediaKeys, ErrorResult& aRv) {
LOG(LogLevel::Debug, ("%p SetMediaKeys(%p) mMediaKeys=%p mDecoder=%p", this,
aMediaKeys, mMediaKeys.get(), mDecoder.get()));
if (MozAudioCaptured()) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow();
if (!win) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<DetailedPromise> promise = DetailedPromise::Create(
win->AsGlobal(), aRv,
NS_LITERAL_CSTRING("HTMLMediaElement.setMediaKeys"));
if (aRv.Failed()) {
return nullptr;
}
// 1. If mediaKeys and the mediaKeys attribute are the same object,
// return a resolved promise.
if (mMediaKeys == aMediaKeys) {
promise->MaybeResolveWithUndefined();
return promise.forget();
}
// 2. If this object's attaching media keys value is true, return a
// promise rejected with a new DOMException whose name is InvalidStateError.
if (mAttachingMediaKey) {
promise->MaybeReject(
NS_ERROR_DOM_INVALID_STATE_ERR,
NS_LITERAL_CSTRING("A MediaKeys object is in attaching operation."));
return promise.forget();
}
// 3. Let this object's attaching media keys value be true.
mAttachingMediaKey = true;
mIncomingMediaKeys = aMediaKeys;
// 4. Let promise be a new promise.
mSetMediaKeysDOMPromise = promise;
// 5. Run the following steps in parallel:
// 5.1 & 5.2 & 5.3
if (!DetachExistingMediaKeys() || !AttachNewMediaKeys()) {
return promise.forget();
}
// 5.4, 5.5, 5.6
MakeAssociationWithCDMResolved();
// 6. Return promise.
return promise.forget();
}
EventHandlerNonNull* HTMLMediaElement::GetOnencrypted() {
return EventTarget::GetEventHandler(nsGkAtoms::onencrypted);
}
void HTMLMediaElement::SetOnencrypted(EventHandlerNonNull* aCallback) {
EventTarget::SetEventHandler(nsGkAtoms::onencrypted, aCallback);
}
EventHandlerNonNull* HTMLMediaElement::GetOnwaitingforkey() {
return EventTarget::GetEventHandler(nsGkAtoms::onwaitingforkey);
}
void HTMLMediaElement::SetOnwaitingforkey(EventHandlerNonNull* aCallback) {
EventTarget::SetEventHandler(nsGkAtoms::onwaitingforkey, aCallback);
}
void HTMLMediaElement::DispatchEncrypted(const nsTArray<uint8_t>& aInitData,
const nsAString& aInitDataType) {
LOG(LogLevel::Debug, ("%p DispatchEncrypted initDataType='%s'", this,
NS_ConvertUTF16toUTF8(aInitDataType).get()));
if (mReadyState == HAVE_NOTHING) {
// Ready state not HAVE_METADATA (yet), don't dispatch encrypted now.
// Queueing for later dispatch in MetadataLoaded.
mPendingEncryptedInitData.AddInitData(aInitDataType, aInitData);
return;
}
RefPtr<MediaEncryptedEvent> event;
if (IsCORSSameOrigin()) {
event = MediaEncryptedEvent::Constructor(this, aInitDataType, aInitData);
} else {
event = MediaEncryptedEvent::Constructor(this);
}
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, event);
asyncDispatcher->PostDOMEvent();
}
bool HTMLMediaElement::IsEventAttributeNameInternal(nsAtom* aName) {
return aName == nsGkAtoms::onencrypted ||
nsGenericHTMLElement::IsEventAttributeNameInternal(aName);
}
already_AddRefed<nsIPrincipal> HTMLMediaElement::GetTopLevelPrincipal() {
RefPtr<nsIPrincipal> principal;
nsCOMPtr<nsPIDOMWindowInner> window = OwnerDoc()->GetInnerWindow();
if (!window) {
return nullptr;
}
// XXXkhuey better hope we always have an outer ...
nsCOMPtr<nsPIDOMWindowOuter> top = window->GetOuterWindow()->GetTop();
if (!top) {
return nullptr;
}
Document* doc = top->GetExtantDoc();
if (!doc) {
return nullptr;
}
principal = doc->NodePrincipal();
return principal.forget();
}
void HTMLMediaElement::NotifyWaitingForKey() {
LOG(LogLevel::Debug, ("%p, NotifyWaitingForKey()", this));
// http://w3c.github.io/encrypted-media/#wait-for-key
// 7.3.4 Queue a "waitingforkey" Event
// 1. Let the media element be the specified HTMLMediaElement object.
// 2. If the media element's waiting for key value is true, abort these steps.
if (mWaitingForKey == NOT_WAITING_FOR_KEY) {
// 3. Set the media element's waiting for key value to true.
// Note: algorithm continues in UpdateReadyStateInternal() when all decoded
// data enqueued in the MDSM is consumed.
mWaitingForKey = WAITING_FOR_KEY;
UpdateReadyStateInternal();
}
}
AudioTrackList* HTMLMediaElement::AudioTracks() { return mAudioTrackList; }
VideoTrackList* HTMLMediaElement::VideoTracks() { return mVideoTrackList; }
TextTrackList* HTMLMediaElement::GetTextTracks() {
return GetOrCreateTextTrackManager()->GetTextTracks();
}
already_AddRefed<TextTrack> HTMLMediaElement::AddTextTrack(
TextTrackKind aKind, const nsAString& aLabel, const nsAString& aLanguage) {
return GetOrCreateTextTrackManager()->AddTextTrack(
aKind, aLabel, aLanguage, TextTrackMode::Hidden,
TextTrackReadyState::Loaded, TextTrackSource::AddTextTrack);
}
void HTMLMediaElement::PopulatePendingTextTrackList() {
if (mTextTrackManager) {
mTextTrackManager->PopulatePendingList();
}
}
TextTrackManager* HTMLMediaElement::GetOrCreateTextTrackManager() {
if (!mTextTrackManager) {
mTextTrackManager = new TextTrackManager(this);
mTextTrackManager->AddListeners();
}
return mTextTrackManager;
}
MediaDecoderOwner::NextFrameStatus HTMLMediaElement::NextFrameStatus() {
if (mDecoder) {
return mDecoder->NextFrameStatus();
}
if (mSrcStream) {
if (mSrcStreamTracksAvailable && !mSrcStreamPlaybackEnded) {
return NEXT_FRAME_AVAILABLE;
}
return NEXT_FRAME_UNAVAILABLE;
}
return NEXT_FRAME_UNINITIALIZED;
}
void HTMLMediaElement::SetDecoder(MediaDecoder* aDecoder) {
MOZ_ASSERT(aDecoder); // Use ShutdownDecoder() to clear.
if (mDecoder) {
ShutdownDecoder();
}
mDecoder = aDecoder;
DDLINKCHILD("decoder", mDecoder.get());
if (mDecoder && mForcedHidden) {
mDecoder->SetForcedHidden(mForcedHidden);
}
}
float HTMLMediaElement::ComputedVolume() const {
return mMuted
? 0.0f
: mAudioChannelWrapper ? mAudioChannelWrapper->GetEffectiveVolume()
: mVolume;
}
bool HTMLMediaElement::ComputedMuted() const {
return (mMuted & MUTED_BY_AUDIO_CHANNEL);
}
nsSuspendedTypes HTMLMediaElement::ComputedSuspended() const {
return mAudioChannelWrapper ? mAudioChannelWrapper->GetSuspendType()
: nsISuspendedTypes::NONE_SUSPENDED;
}
bool HTMLMediaElement::IsCurrentlyPlaying() const {
// We have playable data, but we still need to check whether data is "real"
// current data.
return mReadyState >= HAVE_CURRENT_DATA && !IsPlaybackEnded();
}
void HTMLMediaElement::SetAudibleState(bool aAudible) {
if (mIsAudioTrackAudible != aAudible) {
UpdateAudioTrackSilenceRange(aAudible);
mIsAudioTrackAudible = aAudible;
NotifyAudioPlaybackChanged(
AudioChannelService::AudibleChangedReasons::eDataAudibleChanged);
}
}
bool HTMLMediaElement::IsAudioTrackCurrentlySilent() const {
return HasAudio() && !mIsAudioTrackAudible;
}
void HTMLMediaElement::UpdateAudioTrackSilenceRange(bool aAudible) {
if (!HasAudio()) {
return;
}
if (!aAudible) {
mAudioTrackSilenceStartedTime = CurrentTime();
return;
}
AccumulateAudioTrackSilence();
}
void HTMLMediaElement::AccumulateAudioTrackSilence() {
MOZ_ASSERT(HasAudio());
const double current = CurrentTime();
if (current < mAudioTrackSilenceStartedTime) {
return;
}
const auto start =
media::TimeUnit::FromSeconds(mAudioTrackSilenceStartedTime);
const auto end = media::TimeUnit::FromSeconds(current);
mSilenceTimeRanges += media::TimeInterval(start, end);
}
void HTMLMediaElement::ReportAudioTrackSilenceProportionTelemetry() {
if (!HasAudio()) {
return;
}
// Add last silence range to our ranges set.
if (!mIsAudioTrackAudible) {
AccumulateAudioTrackSilence();
}
RefPtr<TimeRanges> ranges = Played();
const uint32_t lengthPlayedRange = ranges->Length();
const uint32_t lengthSilenceRange = mSilenceTimeRanges.Length();
if (!lengthPlayedRange || !lengthSilenceRange) {
return;
}
double playedTime = 0.0, silenceTime = 0.0;
for (uint32_t idx = 0; idx < lengthPlayedRange; idx++) {
playedTime += ranges->End(idx) - ranges->Start(idx);
}
for (uint32_t idx = 0; idx < lengthSilenceRange; idx++) {
silenceTime += mSilenceTimeRanges.End(idx).ToSeconds() -
mSilenceTimeRanges.Start(idx).ToSeconds();
}
double silenceProportion = (silenceTime / playedTime) * 100;
// silenceProportion should be in the range [0, 100]
silenceProportion = std::min(100.0, std::max(silenceProportion, 0.0));
Telemetry::Accumulate(Telemetry::AUDIO_TRACK_SILENCE_PROPORTION,
silenceProportion);
}
void HTMLMediaElement::NotifyAudioPlaybackChanged(
AudibleChangedReasons aReason) {
if (mAudioChannelWrapper) {
mAudioChannelWrapper->NotifyAudioPlaybackChanged(aReason);
}
// only request wake lock for audible media.
UpdateWakeLock();
}
bool HTMLMediaElement::ShouldElementBePaused() {
// Bfcached page or inactive document.
if (!IsActive()) {
return true;
}
return false;
}
void HTMLMediaElement::SetMediaInfo(const MediaInfo& aInfo) {
const bool oldHasAudio = mMediaInfo.HasAudio();
mMediaInfo = aInfo;
if (aInfo.HasAudio() != oldHasAudio) {
UpdateAudioChannelPlayingState();
NotifyAudioPlaybackChanged(
AudioChannelService::AudibleChangedReasons::eDataAudibleChanged);
}
if (mAudioChannelWrapper) {
mAudioChannelWrapper->AudioCaptureStreamChangeIfNeeded();
}
UpdateWakeLock();
}
void HTMLMediaElement::AudioCaptureStreamChange(bool aCapture) {
// No need to capture a silence media element.
if (!HasAudio()) {
return;
}
if (aCapture && !mCaptureStreamPort) {
nsCOMPtr<nsPIDOMWindowInner> window = OwnerDoc()->GetInnerWindow();
if (!OwnerDoc()->GetInnerWindow()) {
return;
}
uint64_t id = window->WindowID();
MediaStreamGraph* msg = MediaStreamGraph::GetInstance(
MediaStreamGraph::AUDIO_THREAD_DRIVER, window,
MediaStreamGraph::REQUEST_DEFAULT_SAMPLE_RATE);
if (GetSrcMediaStream()) {
mCaptureStreamPort = msg->ConnectToCaptureStream(id, GetSrcMediaStream());
} else {
RefPtr<DOMMediaStream> stream =
CaptureStreamInternal(StreamCaptureBehavior::CONTINUE_WHEN_ENDED,
StreamCaptureType::CAPTURE_AUDIO, msg);
mCaptureStreamPort =
msg->ConnectToCaptureStream(id, stream->GetPlaybackStream());
}
} else if (!aCapture && mCaptureStreamPort) {
if (mDecoder) {
ProcessedMediaStream* ps =
mCaptureStreamPort->GetSource()->AsProcessedStream();
MOZ_ASSERT(ps);
for (uint32_t i = 0; i < mOutputStreams.Length(); i++) {
if (mOutputStreams[i].mStream->GetPlaybackStream() == ps) {
mDecoder->RemoveOutputStream(mOutputStreams[i].mStream);
mOutputStreams.RemoveElementAt(i);
break;
}
}
}
mCaptureStreamPort->Destroy();
mCaptureStreamPort = nullptr;
}
}
void HTMLMediaElement::NotifyCueDisplayStatesChanged() {
if (!mTextTrackManager) {
return;
}
mTextTrackManager->DispatchUpdateCueDisplay();
}
void HTMLMediaElement::MarkAsContentSource(CallerAPI aAPI) {
const bool isVisible = mVisibilityState == Visibility::ApproximatelyVisible;
if (isVisible) {
// 0 = ALL_VISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 0);
} else {
// 1 = ALL_INVISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 1);
if (IsInComposedDoc()) {
// 0 = ALL_IN_TREE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT,
0);
} else {
// 1 = ALL_NOT_IN_TREE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT,
1);
}
}
switch (aAPI) {
case CallerAPI::DRAW_IMAGE: {
if (isVisible) {
// 2 = drawImage_VISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 2);
} else {
// 3 = drawImage_INVISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 3);
if (IsInComposedDoc()) {
// 2 = drawImage_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 2);
} else {
// 3 = drawImage_NOT_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 3);
}
}
break;
}
case CallerAPI::CREATE_PATTERN: {
if (isVisible) {
// 4 = createPattern_VISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 4);
} else {
// 5 = createPattern_INVISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 5);
if (IsInComposedDoc()) {
// 4 = createPattern_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 4);
} else {
// 5 = createPattern_NOT_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 5);
}
}
break;
}
case CallerAPI::CREATE_IMAGEBITMAP: {
if (isVisible) {
// 6 = createImageBitmap_VISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 6);
} else {
// 7 = createImageBitmap_INVISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 7);
if (IsInComposedDoc()) {
// 6 = createImageBitmap_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 6);
} else {
// 7 = createImageBitmap_NOT_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 7);
}
}
break;
}
case CallerAPI::CAPTURE_STREAM: {
if (isVisible) {
// 8 = captureStream_VISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 8);
} else {
// 9 = captureStream_INVISIBLE
Telemetry::Accumulate(Telemetry::VIDEO_AS_CONTENT_SOURCE, 9);
if (IsInComposedDoc()) {
// 8 = captureStream_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 8);
} else {
// 9 = captureStream_NOT_IN_TREE
Telemetry::Accumulate(
Telemetry::VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT, 9);
}
}
break;
}
}
LOG(LogLevel::Debug,
("%p Log VIDEO_AS_CONTENT_SOURCE: visibility = %u, API: '%d' and 'All'",
this, isVisible, static_cast<int>(aAPI)));
if (!isVisible) {
LOG(LogLevel::Debug,
("%p Log VIDEO_AS_CONTENT_SOURCE_IN_TREE_OR_NOT: inTree = %u, API: "
"'%d' and 'All'",
this, IsInComposedDoc(), static_cast<int>(aAPI)));
}
}
void HTMLMediaElement::UpdateCustomPolicyAfterPlayed() {
if (mAudioChannelWrapper) {
mAudioChannelWrapper->NotifyPlayStateChanged();
}
}
AbstractThread* HTMLMediaElement::AbstractMainThread() const {
MOZ_ASSERT(mAbstractMainThread);
return mAbstractMainThread;
}
nsTArray<RefPtr<PlayPromise>> HTMLMediaElement::TakePendingPlayPromises() {
return std::move(mPendingPlayPromises);
}
void HTMLMediaElement::NotifyAboutPlaying() {
// Stick to the DispatchAsyncEvent() call path for now because we want to
// trigger some telemetry-related codes in the DispatchAsyncEvent() method.
DispatchAsyncEvent(NS_LITERAL_STRING("playing"));
}
already_AddRefed<PlayPromise> HTMLMediaElement::CreatePlayPromise(
ErrorResult& aRv) const {
nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow();
if (!win) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<PlayPromise> promise = PlayPromise::Create(win->AsGlobal(), aRv);
LOG(LogLevel::Debug, ("%p created PlayPromise %p", this, promise.get()));
return promise.forget();
}
already_AddRefed<Promise> HTMLMediaElement::CreateDOMPromise(
ErrorResult& aRv) const {
nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow();
if (!win) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
return Promise::Create(win->AsGlobal(), aRv);
}
void HTMLMediaElement::AsyncResolvePendingPlayPromises() {
if (mShuttingDown) {
return;
}
nsCOMPtr<nsIRunnable> event = new nsResolveOrRejectPendingPlayPromisesRunner(
this, TakePendingPlayPromises());
mMainThreadEventTarget->Dispatch(event.forget());
}
void HTMLMediaElement::AsyncRejectPendingPlayPromises(nsresult aError) {
if (!mPaused) {
mPaused = true;
DispatchAsyncEvent(NS_LITERAL_STRING("pause"));
}
if (mShuttingDown) {
return;
}
if (aError == NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR) {
DispatchEventsWhenPlayWasNotAllowed();
}
nsCOMPtr<nsIRunnable> event = new nsResolveOrRejectPendingPlayPromisesRunner(
this, TakePendingPlayPromises(), aError);
mMainThreadEventTarget->Dispatch(event.forget());
}
void HTMLMediaElement::GetEMEInfo(dom::EMEDebugInfo& aInfo) {
if (!mMediaKeys) {
return;
}
mMediaKeys->GetKeySystem(aInfo.mKeySystem);
mMediaKeys->GetSessionsInfo(aInfo.mSessionsInfo);
}
void HTMLMediaElement::NotifyDecoderActivityChanges() const {
if (mDecoder) {
mDecoder->NotifyOwnerActivityChanged(!IsHidden(), mVisibilityState,
IsInComposedDoc());
}
}
Document* HTMLMediaElement::GetDocument() const { return OwnerDoc(); }
void HTMLMediaElement::ConstructMediaTracks(const MediaInfo* aInfo) {
if (mMediaTracksConstructed || !aInfo) {
return;
}
mMediaTracksConstructed = true;
AudioTrackList* audioList = AudioTracks();
if (audioList && aInfo->HasAudio()) {
const TrackInfo& info = aInfo->mAudio;
RefPtr<AudioTrack> track = MediaTrackList::CreateAudioTrack(
audioList->GetOwnerGlobal(), info.mId, info.mKind, info.mLabel,
info.mLanguage, info.mEnabled);
audioList->AddTrack(track);
}
VideoTrackList* videoList = VideoTracks();
if (videoList && aInfo->HasVideo()) {
const TrackInfo& info = aInfo->mVideo;
RefPtr<VideoTrack> track = MediaTrackList::CreateVideoTrack(
videoList->GetOwnerGlobal(), info.mId, info.mKind, info.mLabel,
info.mLanguage);
videoList->AddTrack(track);
track->SetEnabledInternal(info.mEnabled, MediaTrack::FIRE_NO_EVENTS);
}
}
void HTMLMediaElement::RemoveMediaTracks() {
if (mAudioTrackList) {
mAudioTrackList->RemoveTracks();
}
if (mVideoTrackList) {
mVideoTrackList->RemoveTracks();
}
mMediaTracksConstructed = false;
}
class MediaElementGMPCrashHelper : public GMPCrashHelper {
public:
explicit MediaElementGMPCrashHelper(HTMLMediaElement* aElement)
: mElement(aElement) {
MOZ_ASSERT(NS_IsMainThread()); // WeakPtr isn't thread safe.
}
already_AddRefed<nsPIDOMWindowInner> GetPluginCrashedEventTarget() override {
MOZ_ASSERT(NS_IsMainThread()); // WeakPtr isn't thread safe.
if (!mElement) {
return nullptr;
}
return do_AddRef(mElement->OwnerDoc()->GetInnerWindow());
}
private:
WeakPtr<HTMLMediaElement> mElement;
};
already_AddRefed<GMPCrashHelper> HTMLMediaElement::CreateGMPCrashHelper() {
return MakeAndAddRef<MediaElementGMPCrashHelper>(this);
}
void HTMLMediaElement::MarkAsTainted() {
mHasSuspendTaint = true;
if (mDecoder) {
mDecoder->SetSuspendTaint(true);
}
}
bool HasDebuggerOrTabsPrivilege(JSContext* aCx, JSObject* aObj) {
return nsContentUtils::CallerHasPermission(aCx, nsGkAtoms::debugger) ||
nsContentUtils::CallerHasPermission(aCx, nsGkAtoms::tabs);
}
void HTMLMediaElement::AsyncResolveSeekDOMPromiseIfExists() {
MOZ_ASSERT(NS_IsMainThread());
if (mSeekDOMPromise) {
RefPtr<dom::Promise> promise = mSeekDOMPromise.forget();
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
"dom::HTMLMediaElement::AsyncResolveSeekDOMPromiseIfExists",
[promise]() { promise->MaybeResolveWithUndefined(); });
mAbstractMainThread->Dispatch(r.forget());
mSeekDOMPromise = nullptr;
}
}
void HTMLMediaElement::AsyncRejectSeekDOMPromiseIfExists() {
MOZ_ASSERT(NS_IsMainThread());
if (mSeekDOMPromise) {
RefPtr<dom::Promise> promise = mSeekDOMPromise.forget();
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
"dom::HTMLMediaElement::AsyncRejectSeekDOMPromiseIfExists",
[promise]() { promise->MaybeReject(NS_ERROR_DOM_ABORT_ERR); });
mAbstractMainThread->Dispatch(r.forget());
mSeekDOMPromise = nullptr;
}
}
void HTMLMediaElement::ReportCanPlayTelemetry() {
LOG(LogLevel::Debug, ("%s", __func__));
RefPtr<nsIThread> thread;
nsresult rv = NS_NewNamedThread("MediaTelemetry", getter_AddRefs(thread));
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
RefPtr<AbstractThread> abstractThread = mAbstractMainThread;
thread->Dispatch(
NS_NewRunnableFunction(
"dom::HTMLMediaElement::ReportCanPlayTelemetry",
[thread, abstractThread]() {
#if XP_WIN
// Windows Media Foundation requires MSCOM to be inited.
DebugOnly<HRESULT> hr = CoInitializeEx(0, COINIT_MULTITHREADED);
MOZ_ASSERT(hr == S_OK);
#endif
bool aac = MP4Decoder::IsSupportedType(
MediaContainerType(MEDIAMIMETYPE(AUDIO_MP4)), nullptr);
bool h264 = MP4Decoder::IsSupportedType(
MediaContainerType(MEDIAMIMETYPE(VIDEO_MP4)), nullptr);
#if XP_WIN
CoUninitialize();
#endif
abstractThread->Dispatch(NS_NewRunnableFunction(
"dom::HTMLMediaElement::ReportCanPlayTelemetry",
[thread, aac, h264]() {
LOG(LogLevel::Debug,
("MediaTelemetry aac=%d h264=%d", aac, h264));
Telemetry::Accumulate(
Telemetry::HistogramID::VIDEO_CAN_CREATE_AAC_DECODER,
aac);
Telemetry::Accumulate(
Telemetry::HistogramID::VIDEO_CAN_CREATE_H264_DECODER,
h264);
thread->AsyncShutdown();
}));
}),
NS_DISPATCH_NORMAL);
}
already_AddRefed<Promise> HTMLMediaElement::SetSinkId(const nsAString& aSinkId,
ErrorResult& aRv) {
nsCOMPtr<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;
}
if (mSink.first().Equals(aSinkId)) {
promise->MaybeResolveWithUndefined();
return promise.forget();
}
nsString sinkId(aSinkId);
MediaManager::Get()
->GetSinkDevice(win, sinkId)
->Then(
mAbstractMainThread, __func__,
[self = RefPtr<HTMLMediaElement>(this)](
RefPtr<AudioDeviceInfo>&& aInfo) {
// Sink found switch output device.
MOZ_ASSERT(aInfo);
if (self->mDecoder) {
RefPtr<SinkInfoPromise> p = self->mDecoder->SetSink(aInfo)->Then(
self->mAbstractMainThread, __func__,
[aInfo](const GenericPromise::ResolveOrRejectValue& aValue) {
if (aValue.IsResolve()) {
return SinkInfoPromise::CreateAndResolve(aInfo, __func__);
}
return SinkInfoPromise::CreateAndReject(
aValue.RejectValue(), __func__);
});
return p;
}
if (self->GetSrcMediaStream()) {
// Set Sink Id through MSG is not supported yet.
return SinkInfoPromise::CreateAndReject(NS_ERROR_ABORT, __func__);
}
// No media attached to the element save it for later.
return SinkInfoPromise::CreateAndResolve(aInfo, __func__);
},
[](nsresult res) {
// Promise is rejected, sink not found.
return SinkInfoPromise::CreateAndReject(res, __func__);
})
->Then(
mAbstractMainThread, __func__,
[promise, self = RefPtr<HTMLMediaElement>(this),
sinkId](const SinkInfoPromise::ResolveOrRejectValue& aValue) {
if (aValue.IsResolve()) {
self->mSink = MakePair(sinkId, aValue.ResolveValue());
promise->MaybeResolveWithUndefined();
} else {
switch (aValue.RejectValue()) {
case NS_ERROR_ABORT:
promise->MaybeReject(NS_ERROR_DOM_ABORT_ERR);
break;
case NS_ERROR_NOT_AVAILABLE: {
ErrorResult notFoundError;
notFoundError.ThrowDOMException(
NS_ERROR_DOM_NOT_FOUND_ERR,
NS_LITERAL_CSTRING("The object can not be found here."));
promise->MaybeReject(notFoundError);
break;
}
case NS_ERROR_DOM_MEDIA_NOT_ALLOWED_ERR:
promise->MaybeReject(NS_ERROR_DOM_NOT_ALLOWED_ERR);
break;
default:
MOZ_ASSERT_UNREACHABLE("Invalid error.");
}
}
});
aRv = NS_OK;
return promise.forget();
}
void HTMLMediaElement::NotifyTextTrackModeChanged() {
if (mPendingTextTrackChanged) {
return;
}
mPendingTextTrackChanged = true;
mAbstractMainThread->Dispatch(
NS_NewRunnableFunction("HTMLMediaElement::NotifyTextTrackModeChanged",
[this, self = RefPtr<HTMLMediaElement>(this)]() {
mPendingTextTrackChanged = false;
if (!mTextTrackManager) {
return;
}
GetTextTracks()->CreateAndDispatchChangeEvent();
// https://html.spec.whatwg.org/multipage/media.html#text-track-model:show-poster-flag
if (!mShowPoster) {
mTextTrackManager->TimeMarchesOn();
}
}));
}
} // namespace dom
} // namespace mozilla
#undef LOG
#undef LOG_EVENT
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