Cast: Avoid retransmit if we sent the same packet recently (less than RTT)

media/cast/logging/proto/raw_events.proto

 // 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.
 
 // Protocol for audio messages.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
@@ skipping 48 matching lines @@
   FRAME_CAPTURE_BEGIN = 29;
   FRAME_CAPTURE_END = 30;
   FRAME_ENCODED = 31;
   FRAME_ACK_RECEIVED = 32;
   FRAME_ACK_SENT = 33;
   FRAME_DECODED = 34;
   FRAME_PLAYOUT = 35;
   PACKET_SENT_TO_NETWORK = 36;
   PACKET_RETRANSMITTED = 37;
   PACKET_RECEIVED = 38;
+  PACKET_RTX_REJECTED = 39;
 }
 
 // Contains information independent of the stream that describes the system
 // setup, e.g. OS and hardware info.
 message GeneralDescription {
   optional string product = 1;
   optional string product_version = 2;
   optional string os = 3;
 }
 
@@ skipping 60 matching lines @@
 
   // Size of the packet.
   optional int32 size = 4;
 }
 
 message AggregatedPacketEvent {
   optional uint32 relative_rtp_timestamp = 1;
   repeated BasePacketEvent base_packet_event = 2;
 };