Implement HTMLMediaElement::srcObject.

Source/core/html/HTMLMediaElement.cpp

 /*
  * 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 30 matching lines @@
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLMediaSource.h"
 #include "core/html/HTMLSourceElement.h"
 #include "core/html/HTMLTrackElement.h"
 #include "core/html/MediaController.h"
 #include "core/html/MediaError.h"
 #include "core/html/MediaFragmentURIParser.h"
+#include "core/html/MediaProvider.h"
 #include "core/html/TimeRanges.h"
 #include "core/html/shadow/MediaControls.h"
 #include "core/html/track/AudioTrack.h"
 #include "core/html/track/AudioTrackList.h"
 #include "core/html/track/InbandTextTrack.h"
 #include "core/html/track/TextTrackCueList.h"
 #include "core/html/track/TextTrackList.h"
 #include "core/html/track/VideoTrack.h"
 #include "core/html/track/VideoTrackList.h"
 #include "core/loader/FrameLoader.h"
@@ skipping 257 matching lines @@
     , m_networkState(NETWORK_EMPTY)
     , m_readyState(HAVE_NOTHING)
     , m_readyStateMaximum(HAVE_NOTHING)
     , m_volume(1.0f)
     , m_lastSeekTime(0)
     , m_previousProgressTime(std::numeric_limits<double>::max())
     , m_duration(std::numeric_limits<double>::quiet_NaN())
     , m_lastTimeUpdateEventWallTime(0)
     , m_defaultPlaybackStartPosition(0)
     , m_loadState(WaitingForSource)
+    , m_srcObject(std::nullptr_t())
     , m_deferredLoadState(NotDeferred)
     , m_deferredLoadTimer(this, &HTMLMediaElement::deferredLoadTimerFired)
     , m_webLayer(0)
     , m_preload(MediaPlayer::Auto)
     , m_displayMode(Unknown)
     , m_cachedTime(MediaPlayer::invalidTime())
     , m_fragmentStartTime(MediaPlayer::invalidTime())
     , m_fragmentEndTime(MediaPlayer::invalidTime())
     , m_pendingActionFlags(0)
     , m_userGestureRequiredForPlay(false)
@@ skipping 334 matching lines @@
     }
 
     m_pendingActionFlags = 0;
 }
 
 PassRefPtrWillBeRawPtr<MediaError> HTMLMediaElement::error() const
 {
     return m_error;
 }
 
+void HTMLMediaElement::setSrcObject(RawPtr<MediaProvider> mediaProvider)
+{
+    WTF_LOG(Media, "HTMLMediaElement::setSrcObject()");
+    m_srcObject = mediaProvider;
+    clearMediaPlayer(LoadMediaResource);
+    scheduleDelayedAction(LoadMediaResource);
+}
+
+MediaProvider* HTMLMediaElement::srcObject() const
+{
+    return m_srcObject.get();
+}
+
 void HTMLMediaElement::setSrc(const AtomicString& url)
 {
     setAttribute(srcAttr, url);
 }
 
 HTMLMediaElement::NetworkState HTMLMediaElement::networkState() const
 {
     return m_networkState;
 }
 
@@ skipping 151 matching lines @@
         }
     }
 
     selectMediaResource();
 }
 
 void HTMLMediaElement::selectMediaResource()
 {
     WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p)", this);
 
-    enum Mode { attribute, children };
+    enum Mode {Object, Attribute, Children};

[philipj_slow, 2014/09/17 09:25:39]

Please keep the whitespace after/before {/}, all the enums in the header file do
that.

[perkj_chrome, 2014/09/17 19:26:14]

Done.

 
-    // 3 - If the media element has a src attribute, then let mode be attribute.
-    Mode mode = attribute;
-    if (!fastHasAttribute(srcAttr)) {
-        // Otherwise, if the media element does not have a src attribute but has a source
-        // element child, then let mode be children and let candidate be the first such
-        // source element child in tree order.
-        if (HTMLSourceElement* element = Traversal<HTMLSourceElement>::firstChild(*this)) {
-            mode = children;
-            m_nextChildNodeToConsider = element;
-            m_currentSourceNode = nullptr;
-        } else {
-            // Otherwise 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.
-            m_loadState = WaitingForSource;
-            setShouldDelayLoadEvent(false);
-            m_networkState = NETWORK_EMPTY;
+    // 3 - Decide which source to load.
+    // If the media element has a srcObject let the mode be object.
+    // If it has a src attribute, let the mode be attribute.
+    // If it has a source element, let the mode be Children.
+    Mode mode = Object;
+    if (srcObject()) {
+        mode = Object;
+    } else if (fastHasAttribute(srcAttr)) {
+        mode = Attribute;
+    } else if (Traversal<HTMLSourceElement>::firstChild(*this)) {
+        mode = Children;
+        HTMLSourceElement* element = Traversal<HTMLSourceElement>::firstChild(*this);
+        m_nextChildNodeToConsider = element;
+        m_currentSourceNode = nullptr;
+    } else {
+        // Otherwise the media element has no source.
+        // set the networkState to NETWORK_EMPTY, and abort these steps; the
+        // synchronous section ends.
+        m_loadState = WaitingForSource;
+        setShouldDelayLoadEvent(false);
+        m_networkState = NETWORK_EMPTY;
 
-            WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p), nothing to load", this);
-            return;
-        }
+        WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p), nothing to load", this);
+        return;
     }
 
     // 4 - Set the media element's delaying-the-load-event flag to true (this delays the load event),
     // and set its networkState to NETWORK_LOADING.
     setShouldDelayLoadEvent(true);
     m_networkState = NETWORK_LOADING;
 
     // 5 - Queue a task to fire a simple event named loadstart at the media element.
     scheduleEvent(EventTypeNames::loadstart);
 
-    // 6 - If mode is attribute, then run these substeps
-    if (mode == attribute) {
-        m_loadState = LoadingFromSrcAttr;
+    // 6 - Load the correct source.
+    switch (mode) {
+    case Object:
+        loadSourceFromObject();
+        break;
+    case Attribute:
+        loadSourceFromAttribute();
+        break;
+    case Children:
+        loadNextSourceChild();
+        break;
+    }
+}
 
-        // If the src attribute's value is the empty string ... jump down to the failed step below
-        KURL mediaURL = getNonEmptyURLAttribute(srcAttr);
-        if (mediaURL.isEmpty()) {
-            mediaLoadingFailed(WebMediaPlayer::NetworkStateFormatError);
-            WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p), empty 'src'", this);
-            return;
-        }
+void HTMLMediaElement::loadSourceFromObject()
+{
+    m_loadState = LoadingFromSrcObject;
 
-        if (!isSafeToLoadURL(mediaURL, Complain)) {
-            mediaLoadingFailed(WebMediaPlayer::NetworkStateFormatError);
-            return;
-        }
+    KURL mediaURL = document().completeURL(m_srcObject->getObjectUrl());
 
-        // No type or key system information is available when the url comes
-        // from the 'src' attribute so MediaPlayer
-        // will have to pick a media engine based on the file extension.
-        ContentType contentType((String()));
-        loadResource(mediaURL, contentType, String());
-        WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p), using 'src' attribute url", this);
+    if (!isSafeToLoadURL(mediaURL, Complain)) {
+        mediaLoadingFailed(WebMediaPlayer::NetworkStateFormatError);
         return;
     }
 
-    // Otherwise, the source elements will be used
-    loadNextSourceChild();
+    // No type or key system information is available when the url comes
+    // from the 'srcObject' so MediaPlayer
+    // will have to pick a media engine based on the file extension.
+    ContentType contentType((String()));
+    loadResource(mediaURL, contentType, String());
+    WTF_LOG(Media, "HTMLMediaElement::selectMediaResource, using 'srcObject' attribute.");
+    return;
+}
+
+void HTMLMediaElement::loadSourceFromAttribute()
+{
+    m_loadState = LoadingFromSrcAttr;
+
+    // If the src attribute's value is the empty string ... jump down to the failed step below
+    KURL mediaURL = getNonEmptyURLAttribute(srcAttr);
+    if (mediaURL.isEmpty()) {
+        mediaLoadingFailed(WebMediaPlayer::NetworkStateFormatError);
+        WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p), empty 'src'", this);
+        return;
+    }
+
+    if (!isSafeToLoadURL(mediaURL, Complain)) {
+        mediaLoadingFailed(WebMediaPlayer::NetworkStateFormatError);
+        return;
+    }
+
+    // No type or key system information is available when the url comes
+    // from the 'src' attribute so MediaPlayer
+    // will have to pick a media engine based on the file extension.
+    ContentType contentType((String()));
+    loadResource(mediaURL, contentType, String());
+    WTF_LOG(Media, "HTMLMediaElement::selectMediaResource(%p), using 'src' attribute url", this);
+    return;
 }
 
 void HTMLMediaElement::loadNextSourceChild()
 {
     ContentType contentType((String()));
     String keySystem;
     KURL mediaURL = selectNextSourceChild(&contentType, &keySystem, Complain);
     if (!mediaURL.isValid()) {
         waitForSourceChange();
         return;
@@ skipping 3052 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!visitor->isAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(0);
 }
 #endif
 
 }