Support multiple rtx codecs.

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

 /*
  *  Copyright (c) 2012 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 200 matching lines @@
 
 void ModuleRtpRtcpImpl::SetRtxSsrc(uint32_t ssrc) {
   rtp_sender_.SetRtxSsrc(ssrc);
 }
 
 void ModuleRtpRtcpImpl::SetRtxSendPayloadType(int payload_type,
                                               int associated_payload_type) {
   rtp_sender_.SetRtxPayloadType(payload_type, associated_payload_type);
 }
 
-std::pair<int, int> ModuleRtpRtcpImpl::RtxSendPayloadType() const {
-  return rtp_sender_.RtxPayloadType();
-}
-
 int32_t ModuleRtpRtcpImpl::IncomingRtcpPacket(
     const uint8_t* rtcp_packet,
     const size_t length) {
   // Allow receive of non-compound RTCP packets.
   RTCPUtility::RTCPParserV2 rtcp_parser(rtcp_packet, length, true);
 
   const bool valid_rtcpheader = rtcp_parser.IsValid();
   if (!valid_rtcpheader) {
     LOG(LS_WARNING) << "Incoming invalid RTCP packet";
     return -1;
@@ skipping 758 matching lines @@
 void ModuleRtpRtcpImpl::RegisterSendChannelRtpStatisticsCallback(
     StreamDataCountersCallback* callback) {
   rtp_sender_.RegisterRtpStatisticsCallback(callback);
 }
 
 StreamDataCountersCallback*
     ModuleRtpRtcpImpl::GetSendChannelRtpStatisticsCallback() const {
   return rtp_sender_.GetRtpStatisticsCallback();
 }
 }  // namespace webrtc