fix two way audio

pkg/webrtc/conn.go

@@ -161,16 +161,7 @@ func (c *Conn) AddCandidate(candidate string) error {
 	return c.pc.AddICECandidate(webrtc.ICECandidateInit{Candidate: candidate})
 }
 
-func (c *Conn) getTranseiver(mid string) *webrtc.RTPTransceiver {
-	for _, tr := range c.pc.GetTransceivers() {
-		if tr.Mid() == mid {
-			return tr
-		}
-	}
-	return nil
-}
-
-func (c *Conn) getSenderTrack(mid string) *Track {
+func (c *Conn) GetSenderTrack(mid string) *Track {
 	if tr := c.getTranseiver(mid); tr != nil {
 		if s := tr.Sender(); s != nil {
 			if t := s.Track().(*Track); t != nil {
@@ -181,6 +172,15 @@ func (c *Conn) getSenderTrack(mid string) *Track {
 	return nil
 }
 
+func (c *Conn) getTranseiver(mid string) *webrtc.RTPTransceiver {
+	for _, tr := range c.pc.GetTransceivers() {
+		if tr.Mid() == mid {
+			return tr
+		}
+	}
+	return nil
+}
+
 func (c *Conn) getMediaCodec(remote *webrtc.TrackRemote) (*core.Media, *core.Codec) {
 	for _, tr := range c.pc.GetTransceivers() {
 		// search Transeiver for this TrackRemote
@@ -209,7 +209,7 @@ func (c *Conn) getMediaCodec(remote *webrtc.TrackRemote) (*core.Media, *core.Cod
 	// check GetTrack
 	panic(core.Caller())
 
-	return nil, nil
+	// return nil, nil
 }
 
 func sanitizeIP6(host string) string {

pkg/webrtc/consumer.go

@@ -32,7 +32,7 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 		panic(core.Caller())
 	}
 
-	localTrack := c.getSenderTrack(media.ID)
+	localTrack := c.GetSenderTrack(media.ID)
 	if localTrack == nil {
 		return errors.New("webrtc: can't get track")
 	}