WIP - WebMediaPlayer switch media renderer.

media/filters/remoting_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_FILTERS_REMOTING_CONTROLLER_H_
+#define MEDIA_FILTERS_REMOTING_CONTROLLER_H_
+
+// This class does the following:
+// 1) Receive notification from Remoter;
+// 3) Make decision and notify the WebMediaPlayerImpl when to switch the
+// media renderer.
+//
+// It is own by media::PipelineController, and may be created in two places:
+// 1) In CdmSessionAdapter::CreateCdm(). Its ownership is passed to
+// media::PopelineController later.
+// TODO(xjz): The implementation for encrypted content case will be added in a
+// soon-upcoming change.
+// 2) In media::PipelineController if is not created before.
+//
+// TODO(xjz): Mojo service bindings will be added in a soon-upcoming change.
+namespace media {
+
+class PipelineController;
+
+class RemotingController {
+ public:
+  RemotingController();
+  // |pipeline_controller| outlives this class.
+  explicit RemotingController(PipelineController* pipeline_controller);
+  ~RemotingController();
+
+  // Notification of the remoting sink availability from Remoter.
+  void OnSinkAvailable();
+  void OnSinkGone();
+
+  // Setters.
+  void SetFullscreenMode(bool is_fullscreen);
+  void SetIsEncryptedContent();
+  void SetPipelineController(PipelineController* pipeline_controller);
+
+  // Starts/Stops remoting according to |use_remoting_renderer_|, and returns
+  // whether to use remoting renderer. This is used to tell PipelineController
+  // which renderer should be used.
+  bool ShouldUseRemotingRenderer();
+
+ private:
+  bool isVideoDecoderSupported();
+  bool isAudioDecoderSupported();
+
+  // Makes decision on which renderer should be used.
+  void Update();
+
+  // Indicates whether this media element or its ancestor enters full screen.
+  bool is_fullscreen_;
+
+  // Indicates whether WebMediaPlayerImpl encounters encrypted content.
+  bool is_encrypted_content_;
+
+  // Indicates the remoting sink availablity.
+  bool is_sink_available_;
+
+  // Indicates whether we should use remoting renderer.
+  bool use_remoting_renderer_;
+
+  PipelineController* pipeline_controller_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_FILTERS_REMOTING_CONTROLLER_H_