Detect change on video/viewport intersection when rendered remotely

media/remoting/remoting_renderer_controller.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_REMOTING_REMOTING_RENDERER_CONTROLLER_H_
 #define MEDIA_REMOTING_REMOTING_RENDERER_CONTROLLER_H_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "media/base/media_observer.h"
@@ skipping 23 matching lines @@
 
   // MediaObserver implementations.
   void OnEnteredFullscreen() override;
   void OnExitedFullscreen() override;
   void OnBecameDominantVisibleContent(bool is_dominant) override;
   void OnSetCdm(CdmContext* cdm_context) override;
   void OnMetadataChanged(const PipelineMetadata& metadata) override;
   void OnRemotePlaybackDisabled(bool disabled) override;
 
   void SetSwitchRendererCallback(const base::Closure& cb);
+  void SetRemoteSinkAvailableChangedCallback(
+      const base::Callback<void(bool)>& cb);
 
   base::WeakPtr<RemotingRendererController> GetWeakPtr() {
     return weak_factory_.GetWeakPtr();
   }
 
   // Used by RemotingRendererFactory to query whether to create Media Remoting
   // Renderer.
   bool remote_rendering_started() const {
     DCHECK(thread_checker_.CalledOnValidThread());
     return remote_rendering_started_;
@@ skipping 23 matching lines @@
            pipeline_metadata_.audio_decoder_config.IsValidConfig();
   }
 
   bool has_video() const {
     return pipeline_metadata_.has_video &&
            pipeline_metadata_.video_decoder_config.IsValidConfig();
   }
 
   bool IsVideoCodecSupported();
   bool IsAudioCodecSupported();
+  bool IsRemoteSinkAvailable();
 
   // Helper to decide whether to enter or leave Remoting mode.
   bool ShouldBeRemoting();
 
   // Determines whether to enter or leave Remoting mode and switches if
   // necessary.
   void UpdateAndMaybeSwitch();
 
   // Indicates whether this media element or its ancestor is in full screen.
   bool is_fullscreen_ = false;
@@ skipping 16 matching lines @@
   // Remote Playback API spec for more details:
   // https://w3c.github.io/remote-playback
   bool is_remote_playback_disabled_ = true;
 
   // Indicates whether video is the dominant visible content in the tab.
   bool is_dominant_content_ = false;
 
   // The callback to switch the media renderer.
   base::Closure switch_renderer_cb_;
 
+  // Called when remoting sink availability is changed.
+  base::Callback<void(bool)> sink_available_changed_cb_;
+
   // This is initially the RemotingSourceImpl passed to the ctor, and might be
   // replaced with a different instance later if OnSetCdm() is called.
   scoped_refptr<RemotingSourceImpl> remoting_source_;
 
   // This is used to check all the methods are called on the current thread in
   // debug builds.
   base::ThreadChecker thread_checker_;
 
   PipelineMetadata pipeline_metadata_;
 
   base::WeakPtrFactory<RemotingRendererController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RemotingRendererController);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_REMOTING_REMOTING_RENDERER_CONTROLLER_H_