Add FlexfecSender.

webrtc/modules/rtp_rtcp/source/ulpfec_generator.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_ULPFEC_GENERATOR_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_ULPFEC_GENERATOR_H_
 
 #include <list>
 #include <memory>
 #include <vector>
 
 #include "webrtc/modules/rtp_rtcp/source/forward_error_correction.h"
 
 namespace webrtc {
 
+class FlexfecSenderImpl;
+
 class RedPacket {
  public:
   explicit RedPacket(size_t length);
 
   void CreateHeader(const uint8_t* rtp_header,
                     size_t header_length,
                     int red_payload_type,
                     int payload_type);
   void SetSeqNum(int seq_num);
   void AssignPayload(const uint8_t* payload, size_t length);
   void ClearMarkerBit();
   uint8_t* data() const;
   size_t length() const;
 
  private:
   std::unique_ptr<uint8_t[]> data_;
   size_t length_;
   size_t header_length_;
 };
 
 class UlpfecGenerator {
+  friend class FlexfecSender;
+
  public:
   UlpfecGenerator();
   ~UlpfecGenerator();
 
   static std::unique_ptr<RedPacket> BuildRedPacket(const uint8_t* data_buffer,
                                                    size_t payload_length,
                                                    size_t rtp_header_length,
                                                    int red_payload_type);
 
   void SetFecParameters(const FecProtectionParams* params);
@@ skipping 14 matching lines @@
   size_t MaxPacketOverhead() const;
 
   // Returns generated FEC packets with RED headers added.
   std::vector<std::unique_ptr<RedPacket>> GetUlpfecPacketsAsRed(
       int red_payload_type,
       int ulpfec_payload_type,
       uint16_t first_seq_num,
       size_t rtp_header_length);
 
  private:
+  explicit UlpfecGenerator(std::unique_ptr<ForwardErrorCorrection> fec);
+
   // Overhead is defined as relative to the number of media packets, and not
   // relative to total number of packets. This definition is inherited from the
   // protection factor produced by video_coding module and how the FEC
   // generation is implemented.
   int Overhead() const;
 
   // Returns true if the excess overhead (actual - target) for the FEC is below
   // the amount |kMaxExcessOverhead|. This effects the lower protection level
   // cases and low number of media packets/frame. The target overhead is given
   // by |params_.fec_rate|, and is only achievable in the limit of large number
@@ skipping 13 matching lines @@
   std::list<ForwardErrorCorrection::Packet*> generated_fec_packets_;
   int num_protected_frames_;
   int min_num_media_packets_;
   FecProtectionParams params_;
   FecProtectionParams new_params_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_ULPFEC_GENERATOR_H_