Cast: Move retransmission to the transport

media/cast/net/cast_transport_sender.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.
 
 // This is the main interface for the cast transport sender.  It accepts encoded
 // frames (both audio and video), encrypts their encoded data, packetizes them
 // and feeds them into a transport (e.g., UDP).
 
 // Construction of the Cast Sender and the Cast Transport Sender should be done
 // in the following order:
@@ skipping 67 matching lines @@
 
   // Sends a RTCP sender report to the receiver.
   // |ssrc| is the SSRC for this report.
   // |current_time| is the current time reported by a tick clock.
   // |current_time_as_rtp_timestamp| is the corresponding RTP timestamp.
   virtual void SendSenderReport(
       uint32 ssrc,
       base::TimeTicks current_time,
       uint32 current_time_as_rtp_timestamp) = 0;
 
-  // Retransmission request.
-  // |missing_packets| includes the list of frames and packets in each
-  // frame to be re-transmitted.
-  // If |cancel_rtx_if_not_in_list| is used as an optimization to cancel
-  // pending re-transmission requests of packets not listed in
-  // |missing_packets|. If the requested packet(s) were sent recently
-  // (how long is specified by |dedupe_window|) then this re-transmit
-  // will be ignored.
-  virtual void ResendPackets(
-      bool is_audio,
-      const MissingFramesAndPacketsMap& missing_packets,
-      bool cancel_rtx_if_not_in_list,
-      base::TimeDelta dedupe_window) = 0;
+  // Cancels sending packets for the frames in the set.
+  // |ssrc| is the SSRC for the stream.
+  // |frame_ids| contains the IDs of the frames that will be cancelled.
+  virtual void CancelSendingFrames(uint32 ssrc,
+                                   const std::vector<uint32>& frame_ids) = 0;
+
+  // Resends a frame or part of a frame to kickstart. This is used when the
+  // stream appears to be stalled.
+  virtual void ResendFrameForKickstart(uint32 ssrc, uint32 frame_id) = 0;
 
   // Returns a callback for receiving packets for testing purposes.
   virtual PacketReceiverCallback PacketReceiverForTesting();
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_CAST_TRANSPORT_SENDER_H_