Add constructors for WebAudio nodes

third_party/WebKit/Source/modules/webaudio/MediaElementAudioSourceNode.cpp

 /*
  * Copyright (C) 2011, Google 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 11 matching lines @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "modules/webaudio/MediaElementAudioSourceNode.h"
 
 #include "core/dom/ExecutionContextTask.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "modules/webaudio/BaseAudioContext.h"
+#include "modules/webaudio/MediaElementAudioSourceOptions.h"
 #include "platform/audio/AudioUtilities.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/Locker.h"
 #include "wtf/PtrUtil.h"
 
 namespace blink {
 
 MediaElementAudioSourceHandler::MediaElementAudioSourceHandler(AudioNode& node, HTMLMediaElement& mediaElement)
     : AudioHandler(NodeTypeMediaElementAudioSource, node, node.context()->sampleRate())
     , m_mediaElement(mediaElement)
@@ skipping 186 matching lines @@
 
     if (node) {
         mediaElement.setAudioSourceNode(node);
         // context keeps reference until node is disconnected
         context.notifySourceNodeStartedProcessing(node);
     }
 
     return node;
 }
 
+MediaElementAudioSourceNode* MediaElementAudioSourceNode::create(BaseAudioContext* context, const MediaElementAudioSourceOptions& options, ExceptionState& exceptionState)
+{
+    if (!options.hasMediaElement()) {
+        exceptionState.throwDOMException(
+            NotFoundError,
+            "mediaElement member is required.");
+        return nullptr;
+    }
+
+    return create(*context, *options.mediaElement(), exceptionState);
+}
+
 DEFINE_TRACE(MediaElementAudioSourceNode)
 {
     AudioSourceProviderClient::trace(visitor);
     AudioSourceNode::trace(visitor);
 }
 
 MediaElementAudioSourceHandler& MediaElementAudioSourceNode::mediaElementAudioSourceHandler() const
 {
     return static_cast<MediaElementAudioSourceHandler&>(handler());
 }
@@ skipping 18 matching lines @@
     mediaElementAudioSourceHandler().lock();
 }
 
 void MediaElementAudioSourceNode::unlock()
 {
     mediaElementAudioSourceHandler().unlock();
 }
 
 } // namespace blink