Fix two-way audio for webrtc client

Author: AlexxIT

pkg/webrtc/consumer.go

@@ -77,7 +77,13 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 		sender.Handler = pcm.RepackG711(false, sender.Handler)
 	}
 
-	sender.Bind(track)
+	// TODO: rewrite this dirty logic
+	// maybe not best solution, but ActiveProducer connected before AddTrack
+	if c.Mode != core.ModeActiveProducer {
+		sender.Bind(track)
+	} else {
+		sender.HandleRTP(track)
+	}
 
 	c.senders = append(c.senders, sender)
 	return nil