[Cast] Repurpose CastInitializationStatus for variable frame size support.

media/cast/cast_sender_impl.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 MEDIA_CAST_CAST_SENDER_IMPL_H_
 #define MEDIA_CAST_CAST_SENDER_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_defines.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/cast_sender.h"
 #include "media/cast/sender/audio_sender.h"
 #include "media/cast/sender/video_sender.h"
 
 namespace media {
 class VideoFrame;
 
 namespace cast {
 class AudioSender;
 class VideoSender;
 
 // This class combines all required sending objects such as the audio and video
 // senders, pacer, packet receiver and frame input.
 class CastSenderImpl : public CastSender {
  public:
   CastSenderImpl(scoped_refptr<CastEnvironment> cast_environment,
                  CastTransportSender* const transport_sender);
 
-  void InitializeAudio(
-      const AudioSenderConfig& audio_config,
-      const CastInitializationCallback& cast_initialization_cb) override;
+  void InitializeAudio(const AudioSenderConfig& audio_config,
+                       const StatusChangeCallback& status_change_cb) override;
   void InitializeVideo(
       const VideoSenderConfig& video_config,
-      const CastInitializationCallback& cast_initialization_cb,
+      const StatusChangeCallback& status_change_cb,
       const CreateVideoEncodeAcceleratorCallback& create_vea_cb,
       const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb)
       override;
 
   void SetTargetPlayoutDelay(base::TimeDelta new_target_playout_delay) override;
 
   ~CastSenderImpl() override;
 
   scoped_refptr<AudioFrameInput> audio_frame_input() override;
   scoped_refptr<VideoFrameInput> video_frame_input() override;
 
  private:
   void ReceivedPacket(scoped_ptr<Packet> packet);
-  void OnVideoInitialized(
-      const CastInitializationCallback& initialization_cb,
-      media::cast::CastInitializationStatus result);
+  void OnAudioStatusChange(const StatusChangeCallback& status_change_cb,
+                           OperationalStatus status);
+  void OnVideoStatusChange(const StatusChangeCallback& status_change_cb,
+                           OperationalStatus status);
 
-  CastInitializationCallback initialization_callback_;
   scoped_ptr<AudioSender> audio_sender_;
   scoped_ptr<VideoSender> video_sender_;
   scoped_refptr<AudioFrameInput> audio_frame_input_;
   scoped_refptr<VideoFrameInput> video_frame_input_;
   scoped_refptr<CastEnvironment> cast_environment_;
   // The transport sender is owned by the owner of the CastSender, and should be
   // valid throughout the lifetime of the CastSender.
   CastTransportSender* const transport_sender_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<CastSenderImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastSenderImpl);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_CAST_SENDER_IMPL_H_