Make FlexFEC packets paceable through RTPSender.

webrtc/modules/rtp_rtcp/include/flexfec_sender.h

 /*
  *  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 20 matching lines @@
 
 class FlexfecSender {
  public:
   FlexfecSender(int payload_type,
                 uint32_t ssrc,
                 uint32_t protected_media_ssrc,
                 const std::vector<RtpExtension>& rtp_header_extensions,
                 Clock* clock);
   ~FlexfecSender();
 
+  uint32_t ssrc() const { return ssrc_; }
+
   // Sets the FEC rate, max frames sent before FEC packets are sent,
   // and what type of generator matrices are used.
   void SetFecParameters(const FecProtectionParams& params);
 
   // Adds a media packet to the internal buffer. When enough media packets
   // have been added, the FEC packets are generated and stored internally.
   // These FEC packets are then obtained by calling GetFecPackets().
   // Returns true if the media packet was successfully added.
   bool AddRtpPacketAndGenerateFec(const RtpPacketToSend& packet);
 
@@ skipping 22 matching lines @@
   uint16_t seq_num_ GUARDED_BY(sequence_checker_);
 
   // Implementation.
   UlpfecGenerator ulpfec_generator_ GUARDED_BY(sequence_checker_);
   const RtpHeaderExtensionMap rtp_header_extension_map_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_SENDER_H_