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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 HTMLMediaSource_h
     32 #define HTMLMediaSource_h
     33 
     34 #include "core/html/URLRegistry.h"
     35 #include "wtf/Forward.h"
     36 
     37 namespace blink {
     38 class WebMediaSource;
     39 }
     40 
     41 namespace WebCore {
     42 
     43 class HTMLMediaElement;
     44 class TimeRanges;
     45 
     46 class HTMLMediaSource : public URLRegistrable {
     47 public:
     48     static void setRegistry(URLRegistry*);
     49     static HTMLMediaSource* lookup(const String& url) { return s_registry ? static_cast<HTMLMediaSource*>(s_registry->lookup(url)) : 0; }
     50 
     51     void ref() { refHTMLMediaSource(); }
     52     void deref() { derefHTMLMediaSource(); }
     53 
     54     // Called when an HTMLMediaElement is attempting to attach to this object,
     55     // and helps enforce attachment to at most one element at a time.
     56     // If already attached, returns false. Otherwise, must be in
     57     // 'closed' state, and returns true to indicate attachment success.
     58     // Reattachment allowed by first calling close() (even if already in 'closed').
     59     // Once attached, the source uses the element to synchronously service some
     60     // API operations like duration change that may need to initiate seek.
     61     virtual bool attachToElement(HTMLMediaElement*) = 0;
     62     virtual void setWebMediaSourceAndOpen(PassOwnPtr<blink::WebMediaSource>) = 0;
     63     virtual void close() = 0;
     64     virtual bool isClosed() const = 0;
     65     virtual double duration() const = 0;
     66     virtual PassRefPtr<TimeRanges> buffered() const = 0;
     67     virtual void refHTMLMediaSource() = 0;
     68     virtual void derefHTMLMediaSource() = 0;
     69 
     70     // URLRegistrable
     71     virtual URLRegistry& registry() const OVERRIDE { return *s_registry; }
     72 
     73 private:
     74     static URLRegistry* s_registry;
     75 };
     76 
     77 }
     78 
     79 #endif
     80