c# 远程监控（4） 接收端 RTP包重组 分屏显示

private bool NewRTPPacket(RTPPacket packet)
        {
            if (!Clients.ContainsKey(packet.SSRC))//如果接受端第一次接受到某源的数据，则加入到
            {
                if (Clients.Count < 4)//如果发送端为4，则丢弃包
                {
                    Clients.Add(packet.SSRC, new List<RTPPacket> {packet});
                    ImagesBoxMapping[ImagesBoxMapping.First(pair => pair.Value == null).Key] = packet.SSRC;
                }
            }
            else
            {
                Clients[packet.SSRC].Add(packet);
            }

            if (packet.Marker)//如果已经发送完毕
            {
                //丢包检测
                var orderPackets = Clients[packet.SSRC].OrderBy(rtpPacket => rtpPacket.SequenceNumber);
                if (Clients[packet.SSRC].Count != (orderPackets.Last().SequenceNumber - orderPackets.First().SequenceNumber + 1))
                {
                    Clients[packet.SSRC].Clear();//清空缓存区
                    return true;
                }

                //1.包重组
                var count = Clients[packet.SSRC].Sum(rtpPacket => rtpPacket.DataSize);//数据总数

                var newData = new byte[count];

                long offSet = 0;
                foreach (var rtpPacket in Clients[packet.SSRC])
                {
                    Array.Copy(rtpPacket.DataPointer, 0, newData, offSet, rtpPacket.DataSize);
                    offSet += rtpPacket.DataSize;
                }
                Clients[packet.SSRC].Clear();//清空缓存区

                var ms = new MemoryStream(newData);
                try
                {
                    var bmp = new Bitmap(Image.FromStream(ms));
                    var img = new Image<Bgr, Byte>(bmp);
                    ImagesBoxMapping.First(pair => pair.Value == packet.SSRC).Key.Image = img;
                }
                catch (Exception)
                {

                }
                finally
                {
                    ms.Close();
                }
            }
            return true;
        }