Cast: Add GetStats() extensions API.

chrome/renderer/media/cast_session_delegate.h

 // Copyright 2013 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 CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_
 #define CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/default_tick_clock.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_sender.h"
 
 namespace base {
+class DictionaryValue;
 class MessageLoopProxy;
 }  // namespace base
 
 namespace media {
 class VideoFrame;
 
 namespace cast {
 class CastEnvironment;
 class EncodingEventSubscriber;
 class FrameInput;
 
 namespace transport {
 class CastTransportSender;
 }  // namespace transport
 }  // namespace cast
 }  // namespace media
 
 // This class hosts CastSender and connects it to audio/video frame input
 // and network socket.
 // This class is created on the render thread and destroyed on the IO
 // thread. All methods are accessible only on the IO thread.
 class CastSessionDelegate {
  public:
   typedef base::Callback<void(const scoped_refptr<media::cast::FrameInput>&)>
       FrameInputAvailableCallback;
   typedef base::Callback<void(scoped_ptr<std::string>)> EventLogsCallback;
+  typedef base::Callback<void(scoped_ptr<base::DictionaryValue>)> StatsCallback;
 
   CastSessionDelegate();
   virtual ~CastSessionDelegate();
 
   // After calling StartAudio() or StartVideo() encoding of that media will
   // begin as soon as data is delivered to its sink, if the second method is
   // called the first media will be restarted. It is strongly recommended not to
   // deliver any data between calling the two methods.
   // It's OK to call only one of the two methods.
   void StartAudio(const media::cast::AudioSenderConfig& config,
                   const FrameInputAvailableCallback& callback);
   void StartVideo(const media::cast::VideoSenderConfig& config,
                   const FrameInputAvailableCallback& callback);
   void StartUDP(const net::IPEndPoint& local_endpoint,
                 const net::IPEndPoint& remote_endpoint);
 
   void ToggleLogging(bool is_audio, bool enable);
   void GetEventLogsAndReset(bool is_audio, const EventLogsCallback& callback);
+  void GetStatsAndReset(bool is_audio, const StatsCallback& callback);
 
  protected:
   // Callback with the result of the initialization.
   // If this callback is called with STATUS_INITIALIZED it will report back
   // to the sinks that it's ready to accept incoming audio / video frames.
   void InitializationResult(media::cast::CastInitializationStatus result) const;
 
  private:
   // Start encoding threads and initialize the CastEnvironment.
   void Initialize();
@@ skipping 24 matching lines @@
   scoped_ptr<media::cast::EncodingEventSubscriber> audio_event_subscriber_;
   scoped_ptr<media::cast::EncodingEventSubscriber> video_event_subscriber_;
 
   // Proxy to the IO message loop.
   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(CastSessionDelegate);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_