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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
      6  * are met:
      7  * 1.  Redistributions of source code must retain the above copyright
      8  *     notice, this list of conditions and the following disclaimer.
      9  * 2.  Redistributions in binary form must reproduce the above copyright
     10  *     notice, this list of conditions and the following disclaimer in the
     11  *     documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #ifndef WebMediaStreamTrack_h
     26 #define WebMediaStreamTrack_h
     27 
     28 #include "WebCommon.h"
     29 #include "WebNonCopyable.h"
     30 #include "WebPrivatePtr.h"
     31 
     32 namespace WebCore {
     33 class MediaStreamComponent;
     34 }
     35 
     36 namespace WebKit {
     37 class WebMediaStream;
     38 class WebMediaStreamSource;
     39 class WebString;
     40 
     41 class WebMediaStreamTrack {
     42 public:
     43     WebMediaStreamTrack() { }
     44     WebMediaStreamTrack(const WebMediaStreamTrack& other) { assign(other); }
     45     ~WebMediaStreamTrack() { reset(); }
     46 
     47     WebMediaStreamTrack& operator=(const WebMediaStreamTrack& other)
     48     {
     49         assign(other);
     50         return *this;
     51     }
     52     WEBKIT_EXPORT void assign(const WebMediaStreamTrack&);
     53 
     54     WEBKIT_EXPORT void initialize(const WebMediaStreamSource&);
     55     WEBKIT_EXPORT void initialize(const WebString& id, const WebMediaStreamSource&);
     56 
     57     WEBKIT_EXPORT void reset();
     58     bool isNull() const { return m_private.isNull(); }
     59 
     60     WEBKIT_EXPORT WebString id() const;
     61 
     62     WEBKIT_EXPORT WebMediaStream stream() const;
     63     WEBKIT_EXPORT WebMediaStreamSource source() const;
     64     WEBKIT_EXPORT bool isEnabled() const;
     65 
     66 #if WEBKIT_IMPLEMENTATION
     67     WebMediaStreamTrack(PassRefPtr<WebCore::MediaStreamComponent>);
     68     WebMediaStreamTrack(WebCore::MediaStreamComponent*);
     69     WebMediaStreamTrack& operator=(WebCore::MediaStreamComponent*);
     70     operator WTF::PassRefPtr<WebCore::MediaStreamComponent>() const;
     71     operator WebCore::MediaStreamComponent*() const;
     72 #endif
     73 
     74 private:
     75     WebPrivatePtr<WebCore::MediaStreamComponent> m_private;
     76 };
     77 
     78 } // namespace WebKit
     79 
     80 #endif // WebMediaStreamTrack_h
     81