Split out sending loop into a separate function.

client.go

@@ -286,10 +286,9 @@ func addUpConn(c *client, id string) (*upConnection, error) {
 			c.mu.Unlock()
 			return
 		}
-		list := packetlist.New(32)
 		track := &upTrack{
 			track:      remote,
-			list:       list,
+			list:       packetlist.New(32),
 			maxBitrate: ^uint64(0),
 		}
 		u.tracks = append(u.tracks, track)
@@ -304,7 +303,13 @@ func addUpConn(c *client, id string) (*upConnection, error) {
 			}
 		}
 
-		go func() {
+		go upLoop(conn, track)
+	})
+
+	return conn, nil
+}
+
+func upLoop(conn *upConnection, track *upTrack) {
 	buf := make([]byte, packetlist.BufSize)
 	var packet rtp.Packet
 	var local []*downTrack
@@ -317,7 +322,7 @@ func addUpConn(c *client, id string) (*upConnection, error) {
 			localTime = now
 		}
 
-				i, err := remote.Read(buf)
+		i, err := track.track.Read(buf)
 		if err != nil {
 			if err != io.EOF {
 				log.Printf("%v", err)
@@ -342,7 +347,7 @@ func addUpConn(c *client, id string) (*upConnection, error) {
 			}
 		}
 
-				list.Store(packet.SequenceNumber, buf[:i])
+		track.list.Store(packet.SequenceNumber, buf[:i])
 
 		for _, l := range local {
 			if l.muted() {
@@ -354,10 +359,6 @@ func addUpConn(c *client, id string) (*upConnection, error) {
 			}
 		}
 	}
-		}()
-	})
-
-	return conn, nil
 }
 
 func delUpConn(c *client, id string) {