Reland of Make RTX pt/apt reconfigurable by calling WebRtcVideoChannel2::SetRecvParameters.

webrtc/tools/event_log_visualizer/analyzer.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 293 matching lines @@
       last_timestamp = std::max(last_timestamp, timestamp);
     }
 
     switch (parsed_log_.GetEventType(i)) {
       case ParsedRtcEventLog::VIDEO_RECEIVER_CONFIG_EVENT: {
         VideoReceiveStream::Config config(nullptr);
         parsed_log_.GetVideoReceiveConfig(i, &config);
         StreamId stream(config.rtp.remote_ssrc, kIncomingPacket);
         extension_maps[stream] = RtpHeaderExtensionMap(config.rtp.extensions);
         video_ssrcs_.insert(stream);
-        for (auto kv : config.rtp.rtx) {
-          StreamId rtx_stream(kv.second.ssrc, kIncomingPacket);
-          extension_maps[rtx_stream] =
-              RtpHeaderExtensionMap(config.rtp.extensions);
-          video_ssrcs_.insert(rtx_stream);
-          rtx_ssrcs_.insert(rtx_stream);
-        }
+        StreamId rtx_stream(config.rtp.rtx_ssrc, kIncomingPacket);
+        extension_maps[rtx_stream] =
+            RtpHeaderExtensionMap(config.rtp.extensions);
+        video_ssrcs_.insert(rtx_stream);
+        rtx_ssrcs_.insert(rtx_stream);
         break;
       }
       case ParsedRtcEventLog::VIDEO_SENDER_CONFIG_EVENT: {
         VideoSendStream::Config config(nullptr);
         parsed_log_.GetVideoSendConfig(i, &config);
         for (auto ssrc : config.rtp.ssrcs) {
           StreamId stream(ssrc, kOutgoingPacket);
           extension_maps[stream] = RtpHeaderExtensionMap(config.rtp.extensions);
           video_ssrcs_.insert(stream);
         }
@@ skipping 862 matching lines @@
         int64_t capture_ms = packet.header.timestamp / 90.0;
         int64_t arrival_ms = packet.timestamp / 1000.0;
         timestamps.push_back(std::make_pair(capture_ms, arrival_ms));
       }
     }
   }
   return timestamps;
 }
 }  // namespace plotting
 }  // namespace webrtc