Use RtxReceiveStream.

webrtc/config.h

 /*
  *  Copyright (c) 2013 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 31 matching lines @@
   UlpfecConfig()
       : ulpfec_payload_type(-1),
         red_payload_type(-1),
         red_rtx_payload_type(-1) {}
   std::string ToString() const;
   bool operator==(const UlpfecConfig& other) const;
 
   // Payload type used for ULPFEC packets.
   int ulpfec_payload_type;
 
+  // TODO(nisse): Unclear to me if the next two values belong here?

[danilchap, 2017/08/29 13:33:06]

why this comment belong to the CL?
why this description is a TODO? May be instead of the question leave description
how flags are used/supposed to be used.

[nisse-webrtc, 2017/08/29 13:51:36]

I can try to rephrase or move. Comment is here because it makes the flags unused
on one important code path.

Current plan was outlined in a comment on gerrit: Leave as is here, but in
VideoReceiveStreamConfig, replace structUlpfecConfig with just an int
ulpfec_payload_type. I can write that as a TODO at that place instead.

[nisse-webrtc, 2017/08/30 11:49:05]

Done.

+  // Currently, red_rtx_payload_type is used mainly only on the send
+  // side. On the receive side, configuration of the per-packet
+  // processing is done via
+  // VideoReceiveStream::Config::Rtp::rtx_payload_types, but that
+  // mapping is populated by
+  // WebRtcVideoChannel::WebRtcVideoReceiveStream in
+  // webrtcvideoengine.cc based on the values in this struct.
+
   // Payload type used for RED packets.
   int red_payload_type;
 
   // RTX payload type for RED payload.
   int red_rtx_payload_type;
 };
 
 // RTP header extension, see RFC 5285.
 struct RtpExtension {
   RtpExtension() {}
@@ skipping 195 matching lines @@
 
  private:
   // Access to the copy constructor is private to force use of the Copy()
   // method for those exceptional cases where we do use it.
   VideoEncoderConfig(const VideoEncoderConfig&);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CONFIG_H_