Basic use implementation for MediaStream from Canvas: captureStream()

third_party/WebKit/Source/modules/mediastream/MediaStream.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Ericsson AB. 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
@@ skipping 20 matching lines @@
 #include "modules/EventTargetModules.h"
 #include "modules/ModulesExport.h"
 #include "modules/mediastream/MediaStreamTrack.h"
 #include "platform/Timer.h"
 #include "platform/mediastream/MediaStreamDescriptor.h"
 
 namespace blink {
 
 class ExceptionState;
 
-class MODULES_EXPORT MediaStream final
+class MODULES_EXPORT MediaStream
     : public RefCountedGarbageCollectedEventTargetWithInlineData<MediaStream>
     , public URLRegistrable
     , public MediaStreamDescriptorClient
     , public ContextLifecycleObserver {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaStream);
     USING_GARBAGE_COLLECTED_MIXIN(MediaStream);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static MediaStream* create(ExecutionContext*);
     static MediaStream* create(ExecutionContext*, MediaStream*);
@@ skipping 30 matching lines @@
     // EventTarget
     const AtomicString& interfaceName() const override;
     ExecutionContext* executionContext() const override;
 
     // URLRegistrable
     URLRegistry& registry() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
+    friend class CanvasCaptureMediaStream;
+
     MediaStream(ExecutionContext*, MediaStreamDescriptor*);
     MediaStream(ExecutionContext*, const MediaStreamTrackVector& audioTracks, const MediaStreamTrackVector& videoTracks);
 
     // ContextLifecycleObserver
     void contextDestroyed() override;
 
     // MediaStreamDescriptorClient
     void addRemoteTrack(MediaStreamComponent*) override;
     void removeRemoteTrack(MediaStreamComponent*) override;
 
@@ skipping 10 matching lines @@
 
     Timer<MediaStream> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event>> m_scheduledEvents;
 };
 
 typedef HeapVector<Member<MediaStream>> MediaStreamVector;
 
 } // namespace blink
 
 #endif // MediaStream_h