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 SourceBuffer_h
     32 #define SourceBuffer_h
     33 
     34 #include "bindings/v8/ScriptWrappable.h"
     35 #include "core/dom/ActiveDOMObject.h"
     36 #include "core/dom/EventTarget.h"
     37 #include "core/platform/Timer.h"
     38 #include "wtf/PassRefPtr.h"
     39 #include "wtf/RefCounted.h"
     40 #include "wtf/text/WTFString.h"
     41 
     42 namespace WebCore {
     43 
     44 class ExceptionState;
     45 class GenericEventQueue;
     46 class MediaSource;
     47 class SourceBufferPrivate;
     48 class TimeRanges;
     49 
     50 class SourceBuffer : public RefCounted<SourceBuffer>, public ActiveDOMObject, public EventTarget, public ScriptWrappable {
     51 public:
     52     static PassRefPtr<SourceBuffer> create(PassOwnPtr<SourceBufferPrivate>, MediaSource*, GenericEventQueue*);
     53 
     54     virtual ~SourceBuffer();
     55 
     56     // SourceBuffer.idl methods
     57     bool updating() const { return m_updating; }
     58     PassRefPtr<TimeRanges> buffered(ExceptionState&) const;
     59     double timestampOffset() const;
     60     void setTimestampOffset(double, ExceptionState&);
     61     void appendBuffer(PassRefPtr<ArrayBuffer> data, ExceptionState&);
     62     void appendBuffer(PassRefPtr<ArrayBufferView> data, ExceptionState&);
     63     void abort(ExceptionState&);
     64     void remove(double start, double end, ExceptionState&);
     65     double appendWindowStart() const;
     66     void setAppendWindowStart(double, ExceptionState&);
     67     double appendWindowEnd() const;
     68     void setAppendWindowEnd(double, ExceptionState&);
     69 
     70     void abortIfUpdating();
     71     void removedFromMediaSource();
     72 
     73     // ActiveDOMObject interface
     74     virtual bool hasPendingActivity() const OVERRIDE;
     75     virtual void stop() OVERRIDE;
     76 
     77     // EventTarget interface
     78     virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
     79     virtual const AtomicString& interfaceName() const OVERRIDE;
     80 
     81     using RefCounted<SourceBuffer>::ref;
     82     using RefCounted<SourceBuffer>::deref;
     83 
     84 protected:
     85     // EventTarget interface
     86     virtual EventTargetData* eventTargetData() OVERRIDE;
     87     virtual EventTargetData* ensureEventTargetData() OVERRIDE;
     88     virtual void refEventTarget() OVERRIDE { ref(); }
     89     virtual void derefEventTarget() OVERRIDE { deref(); }
     90 
     91 private:
     92     SourceBuffer(PassOwnPtr<SourceBufferPrivate>, MediaSource*, GenericEventQueue*);
     93 
     94     bool isRemoved() const;
     95     void scheduleEvent(const AtomicString& eventName);
     96 
     97     void appendBufferInternal(unsigned char*, unsigned, ExceptionState&);
     98     void appendBufferTimerFired(Timer<SourceBuffer>*);
     99 
    100     void removeTimerFired(Timer<SourceBuffer>*);
    101 
    102     OwnPtr<SourceBufferPrivate> m_private;
    103     MediaSource* m_source;
    104     GenericEventQueue* m_asyncEventQueue;
    105     EventTargetData m_eventTargetData;
    106 
    107     bool m_updating;
    108     double m_timestampOffset;
    109     double m_appendWindowStart;
    110     double m_appendWindowEnd;
    111 
    112     Vector<unsigned char> m_pendingAppendData;
    113     Timer<SourceBuffer> m_appendBufferTimer;
    114 
    115     double m_pendingRemoveStart;
    116     double m_pendingRemoveEnd;
    117     Timer<SourceBuffer> m_removeTimer;
    118 };
    119 
    120 } // namespace WebCore
    121 
    122 #endif
    123