CmaMediaPipelineClient to watch media pipeline status

chromecast/browser/cast_content_browser_client.h

 // Copyright 2014 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 CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 15 matching lines @@
 }
 
 namespace metrics {
 class MetricsService;
 }
 
 namespace chromecast {
 namespace media {
 class MediaPipelineBackend;
 struct MediaPipelineDeviceParams;
+class CmaMediaPipelineClient;
 }
 
 namespace shell {
 
 class CastBrowserMainParts;
 class URLRequestContextFactory;
 
 class CastContentBrowserClient : public content::ContentBrowserClient {
  public:
   // Creates an implementation of CastContentBrowserClient. Platform should
   // link in an implementation as needed.
   static scoped_ptr<CastContentBrowserClient> Create();
 
   ~CastContentBrowserClient() override;
 
   // Appends extra command line arguments before launching a new process.
   virtual void AppendExtraCommandLineSwitches(base::CommandLine* command_line);
 
   // Returns any BrowserMessageFilters that should be added when launching a
   // new render process.
   virtual std::vector<scoped_refptr<content::BrowserMessageFilter>>
   GetBrowserMessageFilters();
 
   // Provide an AudioManagerFactory instance for WebAudio playback.
   virtual scoped_ptr<::media::AudioManagerFactory> CreateAudioManagerFactory();
 
 #if !defined(OS_ANDROID)
-  // Creates a MediaPipelineDevice (CMA backend) for media playback, called
-  // once per media player instance.
-  virtual scoped_ptr<media::MediaPipelineBackend> CreateMediaPipelineBackend(
-      const media::MediaPipelineDeviceParams& params);
+  // Creates a CmaMediaPipelineClient which is responsible to create (CMA
+  // backend)
+  // for media playback and watch media pipeline status, called once per media
+  // player
+  // instance.
+  virtual scoped_refptr<media::CmaMediaPipelineClient>
+  CreateCmaMediaPipelineClient();
 #endif
 
   // Performs cleanup for process exit (but before AtExitManager cleanup).
   void ProcessExiting();
 
   // Invoked when the metrics client ID changes.
   virtual void SetMetricsClientId(const std::string& client_id);
 
   // Allows registration of extra metrics providers.
   virtual void RegisterMetricsProviders(
@@ skipping 94 matching lines @@
 
   scoped_ptr<URLRequestContextFactory> url_request_context_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentBrowserClient);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_