content/renderer/media/webrtc/media_stream_remote_video_source.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_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
   7
   8 #include "base/threading/thread_checker.h"
   9 #include "content/common/content_export.h"
  10 #include "content/renderer/media/media_stream_video_source.h"
  11 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
  12 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
  13
  14 namespace content {
  15
  16 // MediaStreamRemoteVideoSource implements the MediaStreamVideoSource interface
  17 // for video tracks received on a PeerConnection. The purpose of the class is
  18 // to make sure there is no difference between a video track where the source is
  19 // a local source and a video track where the source is a remote video track.
  20 class CONTENT_EXPORT MediaStreamRemoteVideoSource
  21      : public MediaStreamVideoSource,
  22        NON_EXPORTED_BASE(public webrtc::ObserverInterface) {
  23  public:
  24   explicit MediaStreamRemoteVideoSource(
  25       webrtc::VideoTrackInterface* remote_track);
  26   virtual ~MediaStreamRemoteVideoSource();
  27
  28  protected:
  29   // Implements MediaStreamVideoSource.
  30   void GetCurrentSupportedFormats(
  31       int max_requested_width,
  32       int max_requested_height,
  33       double max_requested_frame_rate,
  34       const VideoCaptureDeviceFormatsCB& callback) override;
  35
  36   void StartSourceImpl(
  37       const media::VideoCaptureFormat& format,
  38       const VideoCaptureDeliverFrameCB& frame_callback) override;
  39
  40   void StopSourceImpl() override;
  41
  42   // Used by tests to test that a frame can be received and that the
  43   // MediaStreamRemoteVideoSource behaves as expected.
  44   webrtc::VideoRendererInterface* RenderInterfaceForTest();
  45
  46  private:
  47   // webrtc::ObserverInterface implementation.
  48   void OnChanged() override;
  49
  50   scoped_refptr<webrtc::VideoTrackInterface> remote_track_;
  51   webrtc::MediaStreamTrackInterface::TrackState last_state_;
  52
  53   // Internal class used for receiving frames from the webrtc track on a
  54   // libjingle thread and forward it to the IO-thread.
  55   class RemoteVideoSourceDelegate;
  56   scoped_refptr<RemoteVideoSourceDelegate> delegate_;
  57
  58   // Bound to the render thread.
  59   base::ThreadChecker thread_checker_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(MediaStreamRemoteVideoSource);
  62 };
  63
  64 }  // namespace content
  65
  66 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_