src/content/renderer/media/webrtc/webrtc_media_stream_adapter.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_MEDIA_STREAM_ADAPTER_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_MEDIA_STREAM_ADAPTER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_vector.h"
  11 #include "content/common/content_export.h"
  12 #include "content/renderer/media/media_stream.h"
  13 #include "content/renderer/media/webrtc/webrtc_video_track_adapter.h"
  14 #include "third_party/WebKit/public/platform/WebMediaStream.h"
  15 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
  16
  17 namespace content {
  18
  19 class PeerConnectionDependencyFactory;
  20
  21 // WebRtcMediaStreamAdapter is an adapter between a blink::WebMediaStream
  22 // object and a webrtc MediaStreams that is currently sent on a PeerConnection.
  23 // The responsibility of the class is to create and own a representation of a
  24 // webrtc MediaStream that can be added and removed from a RTCPeerConnection.
  25 // An instance of WebRtcMediaStreamAdapter is created when a MediaStream is
  26 // added to an RTCPeerConnection object
  27 // Instances of this class is owned by the RTCPeerConnectionHandler object that
  28 // created it.
  29 class CONTENT_EXPORT WebRtcMediaStreamAdapter
  30     : NON_EXPORTED_BASE(public MediaStreamObserver) {
  31  public:
  32   WebRtcMediaStreamAdapter(const blink::WebMediaStream& web_stream,
  33                            PeerConnectionDependencyFactory* factory);
  34   ~WebRtcMediaStreamAdapter() override;
  35
  36   bool IsEqual(const blink::WebMediaStream& web_stream) {
  37     return web_stream_.extraData() == web_stream.extraData();
  38   }
  39
  40   webrtc::MediaStreamInterface* webrtc_media_stream() {
  41     return webrtc_media_stream_.get();
  42   }
  43
  44  protected:
  45   // MediaStreamObserver implementation.
  46   void TrackAdded(const blink::WebMediaStreamTrack& track) override;
  47   void TrackRemoved(const blink::WebMediaStreamTrack& track) override;
  48
  49  private:
  50   void CreateAudioTrack(const blink::WebMediaStreamTrack& track);
  51   void CreateVideoTrack(const blink::WebMediaStreamTrack& track);
  52
  53   blink::WebMediaStream web_stream_;
  54
  55   // Pointer to a PeerConnectionDependencyFactory, owned by the RenderThread.
  56   // It's valid for the lifetime of RenderThread.
  57   PeerConnectionDependencyFactory* factory_;
  58
  59   scoped_refptr<webrtc::MediaStreamInterface> webrtc_media_stream_;
  60   ScopedVector<WebRtcVideoTrackAdapter> video_adapters_;
  61
  62   DISALLOW_COPY_AND_ASSIGN (WebRtcMediaStreamAdapter);
  63 };
  64
  65 }  // namespace content
  66
  67 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_MEDIA_STREAM_ADAPTER_H_