Home | History | Annotate | Download | only in mediasource 
      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/dom/EventTarget.h"
     36 #include "core/html/HTMLMediaSource.h"
     37 #include "core/html/URLRegistry.h"
     38 #include "core/platform/graphics/MediaSourcePrivate.h"
     39 #include "wtf/PassOwnPtr.h"
     40 #include "wtf/RefCounted.h"
     41 #include "wtf/Vector.h"
     42 
     43 namespace WebCore {
     44 
     45 class ExceptionState;
     46 class GenericEventQueue;
     47 
     48 class MediaSourceBase : public RefCounted<MediaSourceBase>, public HTMLMediaSource, public ActiveDOMObject, public EventTarget {
     49 public:
     50     static const AtomicString& openKeyword();
     51     static const AtomicString& closedKeyword();
     52     static const AtomicString& endedKeyword();
     53 
     54     virtual ~MediaSourceBase();
     55 
     56     void addedToRegistry();
     57     void removedFromRegistry();
     58     void openIfInEndedState();
     59     bool isOpen() const;
     60 
     61     // HTMLMediaSource
     62     virtual bool attachToElement(HTMLMediaElement*) OVERRIDE;
     63     virtual void setPrivateAndOpen(PassOwnPtr<MediaSourcePrivate>) OVERRIDE;
     64     virtual void close() OVERRIDE;
     65     virtual bool isClosed() const OVERRIDE;
     66     virtual double duration() const OVERRIDE;
     67     virtual PassRefPtr<TimeRanges> buffered() const OVERRIDE;
     68     virtual void refHTMLMediaSource() OVERRIDE { ref(); }
     69     virtual void derefHTMLMediaSource() OVERRIDE { deref(); }
     70 
     71     void setDuration(double, ExceptionState&);
     72     const AtomicString& readyState() const { return m_readyState; }
     73     void setReadyState(const AtomicString&);
     74     void endOfStream(const AtomicString& error, ExceptionState&);
     75 
     76 
     77     // ActiveDOMObject interface
     78     virtual bool hasPendingActivity() const OVERRIDE;
     79     virtual void stop() OVERRIDE;
     80 
     81     // EventTarget interface
     82     virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
     83     virtual EventTargetData* eventTargetData() OVERRIDE;
     84     virtual EventTargetData* ensureEventTargetData() OVERRIDE;
     85     virtual void refEventTarget() OVERRIDE { ref(); }
     86     virtual void derefEventTarget() OVERRIDE { deref(); }
     87 
     88     // URLRegistrable interface
     89     virtual URLRegistry& registry() const OVERRIDE;
     90 
     91     using RefCounted<MediaSourceBase>::ref;
     92     using RefCounted<MediaSourceBase>::deref;
     93 
     94 protected:
     95     explicit MediaSourceBase(ScriptExecutionContext*);
     96 
     97     virtual void onReadyStateChange(const AtomicString& oldState, const AtomicString& newState) = 0;
     98     virtual Vector<RefPtr<TimeRanges> > activeRanges() const = 0;
     99 
    100     PassOwnPtr<SourceBufferPrivate> createSourceBufferPrivate(const String& type, const MediaSourcePrivate::CodecsArray&, ExceptionState&);
    101     void scheduleEvent(const AtomicString& eventName);
    102     GenericEventQueue* asyncEventQueue() const { return m_asyncEventQueue.get(); }
    103 
    104 private:
    105     OwnPtr<MediaSourcePrivate> m_private;
    106     EventTargetData m_eventTargetData;
    107     AtomicString m_readyState;
    108     OwnPtr<GenericEventQueue> m_asyncEventQueue;
    109     HTMLMediaElement* m_attachedElement;
    110 };
    111 
    112 }
    113 
    114 #endif
    115