Media element resource selection algorithm should "await a stable state"

third_party/WebKit/Source/core/html/HTMLMediaElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 334 matching lines @@
     void addTextTrack(WebInbandTextTrack*) final;
     void removeTextTrack(WebInbandTextTrack*) final;
     void mediaSourceOpened(WebMediaSource*) final;
     void requestSeek(double) final;
     void remoteRouteAvailabilityChanged(bool) final;
     void connectedToRemoteDevice() final;
     void disconnectedFromRemoteDevice() final;
     void cancelledRemotePlaybackRequest() final;
     void requestReload(const WebURL&) final;
 
-    void loadTimerFired(TimerBase*);
+    void textTrackLoadTimerFired(TimerBase*);
     void progressEventTimerFired(TimerBase*);
     void playbackProgressTimerFired(TimerBase*);
     void startPlaybackProgressTimer();
     void startProgressEventTimer();
     void stopPeriodicTimers();
 
     void seek(double time);
     void finishSeek();
     void checkIfSeekNeeded();
     void addPlayedRange(double start, double end);
 
     void scheduleEvent(const AtomicString& eventName); // FIXME: Rename to scheduleNamedEvent for clarity.
 
     // loading
     void invokeLoadAlgorithm();
     void invokeResourceSelectionAlgorithm();
+    void continueResourceSelectionAlgorithm();
     void loadInternal();
     void selectMediaResource();
     void loadResource(const WebMediaPlayerSource&, const ContentType&);
     void startPlayerLoad(const KURL& playerProvidedUrl = KURL());
     void setPlayerPreload();
     WebMediaPlayer::LoadType loadType() const;
     void scheduleNextSourceChild();
     void loadSourceFromObject();
     void loadSourceFromAttribute();
     void loadNextSourceChild();
+    void loadNextSourceChildAfterError();
     void clearMediaPlayer();
     void clearMediaPlayerAndAudioSourceProviderClientWithoutLocking();
     bool havePotentialSourceChild();
     void noneSupported();
     void mediaEngineError(MediaError*);
     void cancelPendingEventsAndCallbacks();
     void waitForSourceChange();
     void setIgnorePreloadNone();
 
     KURL selectNextSourceChild(ContentType*, InvalidURLAction);
@@ skipping 96 matching lines @@
     void scheduleNotifyPlaying();
     void resolveScheduledPlayPromises();
     void rejectScheduledPlayPromises();
     void rejectPlayPromises(ExceptionCode, const String&);
     void rejectPlayPromisesInternal(ExceptionCode, const String&);
 
     EnumerationHistogram& showControlsHistogram() const;
 
     void onVisibilityChangedForAutoplay(bool isVisible);
 
-    UnthrottledThreadTimer<HTMLMediaElement> m_loadTimer;
+    UnthrottledThreadTimer<HTMLMediaElement> m_textTrackLoadTimer;
     UnthrottledThreadTimer<HTMLMediaElement> m_progressEventTimer;
     UnthrottledThreadTimer<HTMLMediaElement> m_playbackProgressTimer;
     UnthrottledThreadTimer<HTMLMediaElement> m_audioTracksTimer;
     Member<TimeRanges> m_playedTimeRanges;
     Member<GenericEventQueue> m_asyncEventQueue;
 
     double m_playbackRate;
     double m_defaultPlaybackRate;
     NetworkState m_networkState;
     ReadyState m_readyState;
@@ skipping 48 matching lines @@
     DisplayMode m_displayMode;
 
     Member<HTMLMediaSource> m_mediaSource;
 
     // Cached time value. Only valid when ready state is kHaveMetadata or
     // higher, otherwise the current time is assumed to be zero.
     mutable double m_cachedTime;
 
     double m_fragmentEndTime;
 
-    typedef unsigned PendingActionFlags;
-    PendingActionFlags m_pendingActionFlags;
-
     // FIXME: HTMLMediaElement has way too many state bits.
     bool m_lockedPendingUserGesture : 1;
     bool m_playing : 1;
     bool m_shouldDelayLoadEvent : 1;
     bool m_haveFiredLoadedData : 1;
     bool m_autoplaying : 1;
     bool m_muted : 1;
     bool m_paused : 1;
     bool m_seeking : 1;
 
@@ skipping 19 matching lines @@
 
     Member<CueTimeline> m_cueTimeline;
 
     HeapVector<Member<ScriptPromiseResolver>> m_playPromiseResolvers;
     std::unique_ptr<CancellableTaskFactory> m_playPromiseResolveTask;
     std::unique_ptr<CancellableTaskFactory> m_playPromiseRejectTask;
     HeapVector<Member<ScriptPromiseResolver>> m_playPromiseResolveList;
     HeapVector<Member<ScriptPromiseResolver>> m_playPromiseRejectList;
     ExceptionCode m_playPromiseErrorCode;
 
+    std::unique_ptr<CancellableTaskFactory> m_resourceSelectionAlgorithmContinuationTask;
+    std::unique_ptr<CancellableTaskFactory> m_loadNextSourceChildAfterErrorTask;
+
     // This is a weak reference, since m_audioSourceNode holds a reference to us.
     // TODO(Oilpan): Consider making this a strongly traced pointer with oilpan where strong cycles are not a problem.
     GC_PLUGIN_IGNORE("http://crbug.com/404577")
     WeakMember<AudioSourceProviderClient> m_audioSourceNode;
 
     // AudioClientImpl wraps an AudioSourceProviderClient.
     // When the audio format is known, Chromium calls setFormat().
     class AudioClientImpl final : public GarbageCollectedFinalized<AudioClientImpl>, public WebAudioSourceProviderClient {
     public:
         explicit AudioClientImpl(AudioSourceProviderClient* client)
@@ skipping 63 matching lines @@
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
     return isHTMLAudioElement(element) || isHTMLVideoElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);
 
 } // namespace blink
 
 #endif // HTMLMediaElement_h