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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef MediaSourceBase_h
     32 #define MediaSourceBase_h
     33 
     34 #include "core/dom/ActiveDOMObject.h"
     35 #include "core/events/EventTarget.h"
     36 #include "core/html/HTMLMediaSource.h"
     37 #include "core/html/URLRegistry.h"
     38 #include "wtf/PassOwnPtr.h"
     39 #include "wtf/RefCounted.h"
     40 #include "wtf/Vector.h"
     41 
     42 namespace blink {
     43 class WebMediaSource;
     44 class WebSourceBuffer;
     45 }
     46 
     47 namespace WebCore {
     48 
     49 class ExceptionState;
     50 class GenericEventQueue;
     51 
     52 class MediaSourceBase : public RefCounted<MediaSourceBase>, public HTMLMediaSource, public ActiveDOMObject, public EventTargetWithInlineData {
     53     REFCOUNTED_EVENT_TARGET(MediaSourceBase);
     54 public:
     55     static const AtomicString& openKeyword();
     56     static const AtomicString& closedKeyword();
     57     static const AtomicString& endedKeyword();
     58 
     59     virtual ~MediaSourceBase();
     60 
     61     void addedToRegistry();
     62     void removedFromRegistry();
     63     void openIfInEndedState();
     64     bool isOpen() const;
     65 
     66     // HTMLMediaSource
     67     virtual bool attachToElement(HTMLMediaElement*) OVERRIDE;
     68     virtual void setWebMediaSourceAndOpen(PassOwnPtr<blink::WebMediaSource>) OVERRIDE;
     69     virtual void close() OVERRIDE;
     70     virtual bool isClosed() const OVERRIDE;
     71     virtual double duration() const OVERRIDE;
     72     virtual PassRefPtr<TimeRanges> buffered() const OVERRIDE;
     73     virtual void refHTMLMediaSource() OVERRIDE { ref(); }
     74     virtual void derefHTMLMediaSource() OVERRIDE { deref(); }
     75 
     76     void setDuration(double, ExceptionState&);
     77     const AtomicString& readyState() const { return m_readyState; }
     78     void setReadyState(const AtomicString&);
     79     void endOfStream(const AtomicString& error, ExceptionState&);
     80 
     81 
     82     // ActiveDOMObject interface
     83     virtual bool hasPendingActivity() const OVERRIDE;
     84     virtual void stop() OVERRIDE;
     85 
     86     // EventTarget interface
     87     virtual ExecutionContext* executionContext() const OVERRIDE;
     88 
     89     // URLRegistrable interface
     90     virtual URLRegistry& registry() const OVERRIDE;
     91 
     92 protected:
     93     explicit MediaSourceBase(ExecutionContext*);
     94 
     95     virtual void onReadyStateChange(const AtomicString& oldState, const AtomicString& newState) = 0;
     96     virtual Vector<RefPtr<TimeRanges> > activeRanges() const = 0;
     97 
     98     PassOwnPtr<blink::WebSourceBuffer> createWebSourceBuffer(const String& type, const Vector<String>& codecs, ExceptionState&);
     99     void scheduleEvent(const AtomicString& eventName);
    100     GenericEventQueue* asyncEventQueue() const { return m_asyncEventQueue.get(); }
    101 
    102 private:
    103     OwnPtr<blink::WebMediaSource> m_webMediaSource;
    104     AtomicString m_readyState;
    105     OwnPtr<GenericEventQueue> m_asyncEventQueue;
    106     HTMLMediaElement* m_attachedElement;
    107 };
    108 
    109 }
    110 
    111 #endif
    112