MSE: Start letting SourceBuffer begin to do initialization segment received algorithm

Source/modules/mediasource/SourceBuffer.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #ifndef SourceBuffer_h
 #define SourceBuffer_h
 
 #include "core/dom/ActiveDOMObject.h"
 #include "core/fileapi/FileReaderLoaderClient.h"
 #include "modules/EventTargetModules.h"
 #include "platform/AsyncMethodRunner.h"
 #include "platform/weborigin/KURL.h"
+#include "public/platform/WebSourceBufferClient.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ExceptionState;
 class FileReaderLoader;
 class GenericEventQueue;
 class MediaSource;
 class Stream;
 class TimeRanges;
 class WebSourceBuffer;
 
-class SourceBuffer FINAL : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<SourceBuffer>, public ActiveDOMObject, public EventTargetWithInlineData, public FileReaderLoaderClient {
+class SourceBuffer FINAL : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<SourceBuffer>, public ActiveDOMObject, public EventTargetWithInlineData, public FileReaderLoaderClient, public WebSourceBufferClient {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<SourceBuffer>);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SourceBuffer);
 public:
     static SourceBuffer* create(PassOwnPtr<WebSourceBuffer>, MediaSource*, GenericEventQueue*);
     static const AtomicString& segmentsKeyword();
     static const AtomicString& sequenceKeyword();
 
     virtual ~SourceBuffer();
 
@@ skipping 21 matching lines @@
     // ActiveDOMObject interface
     virtual bool hasPendingActivity() const OVERRIDE;
     virtual void suspend() OVERRIDE;
     virtual void resume() OVERRIDE;
     virtual void stop() OVERRIDE;
 
     // EventTarget interface
     virtual ExecutionContext* executionContext() const OVERRIDE;
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
+    // WebSourceBufferClient interface
+    virtual void initializationSegmentReceived() OVERRIDE;
+
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     SourceBuffer(PassOwnPtr<WebSourceBuffer>, MediaSource*, GenericEventQueue*);
 
     bool isRemoved() const;
     void scheduleEvent(const AtomicString& eventName);
 
     void appendBufferInternal(const unsigned char*, unsigned, ExceptionState&);
     void appendBufferAsyncPart();
@@ skipping 14 matching lines @@
     OwnPtr<WebSourceBuffer> m_webSourceBuffer;
     Member<MediaSource> m_source;
     GenericEventQueue* m_asyncEventQueue;
 
     AtomicString m_mode;
     bool m_updating;
     double m_timestampOffset;
     double m_appendWindowStart;
     double m_appendWindowEnd;
 
+    // Tracks whether the first initialization segment has been received.
+    bool m_firstInitializationSegment;
+
     Vector<unsigned char> m_pendingAppendData;
     size_t m_pendingAppendDataOffset;
     AsyncMethodRunner<SourceBuffer> m_appendBufferAsyncPartRunner;
 
     double m_pendingRemoveStart;
     double m_pendingRemoveEnd;
     AsyncMethodRunner<SourceBuffer> m_removeAsyncPartRunner;
 
     bool m_streamMaxSizeValid;
     unsigned long long m_streamMaxSize;
     AsyncMethodRunner<SourceBuffer> m_appendStreamAsyncPartRunner;
     RefPtrWillBeMember<Stream> m_stream;
     OwnPtr<FileReaderLoader> m_loader;
 };
 
 } // namespace blink
 
 #endif // SourceBuffer_h