webrtc中flexfec类图

以下是WebRTC中FlexFEC的类图：

              +------------------+
              |      FlexFEC     |
              +------------------+
              |+ OnReceivedFec() |
              +------------------+
                        |
                        |uses
                        |
              +------------------+
              |     RtpPacket     |
              +------------------+
              |+ sequence_number |
              |+ payload_type    |
              |+ marker_bit      |
              |+ timestamp       |
              |+ payload_size    |
              |+ payload_data    |
              +------------------+
                        |
                        |uses
                        |
              +------------------+
              |    ForwardError  |
              |     Correction   |
              +------------------+
              |+ OnReceivedFec() |
              +------------------+
                        |
                        |uses
                        |
              +------------------+
              |     RtpPacket     |
              +------------------+
              |+ sequence_number |
              |+ payload_type    |
              |+ marker_bit      |
              |+ timestamp       |
              |+ payload_size    |
              |+ payload_data    |
              +------------------+

FlexFEC类是一个简单的类，它只有一个公共方法OnReceivedFec()，用于接收并处理FlexFEC数据包。FlexFEC数据包由RtpPacket类表示，该类包含了RTP数据包的所有字段和数据。ForwardErrorCorrection类实现了前向纠错算法，用于纠正丢失的RTP数据包。