third_party/WebKit/public/platform/WebMediaStreamCenter.h

   1 /*
   2  * Copyright (C) 2012 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 WebMediaStreamCenter_h
  32 #define WebMediaStreamCenter_h
  33
  34 #include "WebVector.h"
  35
  36 namespace blink {
  37
  38 class WebAudioSourceProvider;
  39 class WebMediaStream;
  40 class WebMediaStreamTrack;
  41
  42 class WebMediaStreamCenter {
  43 public:
  44     virtual ~WebMediaStreamCenter() { }
  45
  46     // Stream functionality.
  47     virtual void didCreateMediaStream(WebMediaStream&) = 0;
  48     virtual bool didAddMediaStreamTrack(const WebMediaStream&, const WebMediaStreamTrack&) = 0;
  49     virtual bool didRemoveMediaStreamTrack(const WebMediaStream&, const WebMediaStreamTrack&) = 0;
  50     virtual void didStopLocalMediaStream(const WebMediaStream&) = 0;
  51
  52     // Track functionality.
  53     virtual void didCreateMediaStreamTrack(const WebMediaStreamTrack&) { }
  54     virtual void didEnableMediaStreamTrack(const WebMediaStreamTrack&) { }
  55     virtual void didDisableMediaStreamTrack(const WebMediaStreamTrack&) { }
  56     virtual bool didStopMediaStreamTrack(const WebMediaStreamTrack&) { return false; }
  57
  58     // Caller must take the ownership of the returned |WebAudioSourceProvider| object.
  59     virtual WebAudioSourceProvider* createWebAudioSourceFromMediaStreamTrack(const WebMediaStreamTrack&) { return nullptr; }
  60 };
  61
  62 } // namespace blink
  63
  64 #endif // WebMediaStreamCenter_h
  65