[Cast] Aggressively send sender reports until first receiver report is received.

media/cast/video_sender/video_sender.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_VIDEO_SENDER_VIDEO_SENDER_H_
 #define MEDIA_CAST_VIDEO_SENDER_VIDEO_SENDER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/time/tick_clock.h"
 #include "base/time/time.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/congestion_control/congestion_control.h"
 #include "media/cast/logging/logging_defines.h"
 #include "media/cast/rtcp/rtcp.h"
 #include "media/cast/rtp_timestamp_helper.h"
 
 namespace media {
 class VideoFrame;
 
 namespace cast {
-class LocalRtcpVideoSenderFeedback;
 class LocalVideoEncoderCallback;
 class VideoEncoder;
 
 namespace transport {
 class CastTransportSender;
 }
 
 // Not thread safe. Only called from the main cast thread.
 // This class owns all objects related to sending video, objects that create RTP
 // packets, congestion control, video encoder, parsing and sending of
 // RTCP packets.
 // Additionally it posts a bunch of delayed tasks to the main thread for various
 // timeouts.
-class VideoSender : public base::NonThreadSafe,
+class VideoSender : public RtcpSenderFeedback,
+                    public base::NonThreadSafe,
                     public base::SupportsWeakPtr<VideoSender> {
  public:
   VideoSender(scoped_refptr<CastEnvironment> cast_environment,
               const VideoSenderConfig& video_config,
               const CreateVideoEncodeAcceleratorCallback& create_vea_cb,
               const CreateVideoEncodeMemoryCallback& create_video_encode_mem_cb,
               const CastInitializationCallback& cast_initialization_cb,
               transport::CastTransportSender* const transport_sender);
 
   virtual ~VideoSender();
 
   // The video_frame must be valid until the closure callback is called.
   // The closure callback is called from the video encoder thread as soon as
   // the encoder is done with the frame; it does not mean that the encoded frame
   // has been sent out.
   void InsertRawVideoFrame(const scoped_refptr<media::VideoFrame>& video_frame,
                            const base::TimeTicks& capture_time);
 
   // Only called from the main cast thread.
   void IncomingRtcpPacket(scoped_ptr<Packet> packet);
 
  protected:
   // Protected for testability.
-  void OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback);
+  virtual void OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback)
+      OVERRIDE;
 
  private:
   friend class LocalRtcpVideoSenderFeedback;
 
   // Schedule when we should send the next RTPC report,
   // via a PostDelayedTask to the main cast thread.
   void ScheduleNextRtcpReport();
-  void SendRtcpReport();
+  void SendRtcpReport(bool schedule_future_reports);
 
   // Schedule when we should check that we have received an acknowledgment, or a
   // loss report from our remote peer. If we have not heard back from our remote
   // peer we speculatively resend our oldest unacknowledged frame (the whole
   // frame). Note for this to happen we need to lose all pending packets (in
   // normal operation 3 full frames), hence this is the last resort to prevent
   // us getting stuck after a long outage.
   void ScheduleNextResendCheck();
   void ResendCheck();
 
@@ skipping 14 matching lines @@
 
   void UpdateBitrate(int32 new_bitrate);
 
   base::TimeDelta rtp_max_delay_;
   const int max_frame_rate_;
 
   scoped_refptr<CastEnvironment> cast_environment_;
   transport::CastTransportSender* const transport_sender_;
 
   RtpTimestampHelper rtp_timestamp_helper_;
-  scoped_ptr<LocalRtcpVideoSenderFeedback> rtcp_feedback_;
   scoped_ptr<VideoEncoder> video_encoder_;
   scoped_ptr<Rtcp> rtcp_;
+  int num_aggressive_rtcp_reports_sent_;
   uint8 max_unacked_frames_;
   int last_acked_frame_id_;
   int last_sent_frame_id_;
   int frames_in_encoder_;
   int duplicate_ack_;
   base::TimeTicks last_send_time_;
   base::TimeTicks last_checked_skip_count_time_;
   int last_skip_count_;
   int current_requested_bitrate_;
   // When we get close to the max number of un-acked frames, we set lower
@@ skipping 16 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoSender> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoSender);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_VIDEO_SENDER_VIDEO_SENDER_H_