pkg/peer.go

@@ -61,8 +61,6 @@ func (p *Peer) Join(sid string, sdp webrtc.SessionDescription) (*webrtc.SessionD
 		log.Debugf("peer already exists")
 		return nil, ErrTransportExists
 	}
-	p.Lock()
-	defer p.Unlock()
 
 	me := MediaEngine{}
 	err := me.PopulateFromSDP(sdp)
@@ -151,8 +149,7 @@ func (p *Peer) Answer(sdp webrtc.SessionDescription) (*webrtc.SessionDescription
 	if p.subscriber == nil {
 		return nil, ErrNoTransportEstablished
 	}
-	p.Lock()
-	defer p.Unlock()
+
 	log.Infof("peer %s got offer", p.id)
 
 	if p.publisher.SignalingState() != webrtc.SignalingStateStable {

pkg/publisher.go

@@ -2,14 +2,13 @@ package sfu
 
 import (
 	"sync"
+	"sync/atomic"
 
 	log "github.com/pion/ion-log"
 	"github.com/pion/webrtc/v3"
 )
 
 type Publisher struct {
-	sync.Mutex
-
 	id string
 	pc *webrtc.PeerConnection
 
@@ -18,7 +17,7 @@ type Publisher struct {
 	candidates []webrtc.ICECandidateInit
 
 	onTrackHandler                    func(*webrtc.Track, *webrtc.RTPReceiver)
-	onICEConnectionStateChangeHandler func(webrtc.ICEConnectionState)
+	onICEConnectionStateChangeHandler atomic.Value // func(webrtc.ICEConnectionState)
 
 	closeOnce sync.Once
 }
@@ -64,11 +63,10 @@ func NewPublisher(session *Session, id string, me MediaEngine, cfg WebRTCTranspo
 				p.router.Stop()
 			})
 		}
-		p.Lock()
-		if p.onICEConnectionStateChangeHandler != nil {
-			p.onICEConnectionStateChangeHandler(connectionState)
+
+		if handler, ok := p.onICEConnectionStateChangeHandler.Load().(func()); ok && handler != nil {
+			handler()
 		}
-		p.Unlock()
 	})
 
 	return p, nil
@@ -109,9 +107,7 @@ func (p *Publisher) OnICECandidate(f func(c *webrtc.ICECandidate)) {
 }
 
 func (p *Publisher) OnICEConnectionStateChange(f func(connectionState webrtc.ICEConnectionState)) {
-	p.Lock()
-	p.onICEConnectionStateChangeHandler = f
-	p.Unlock()
+	p.onICEConnectionStateChangeHandler.Store(f)
 }
 
 func (p *Publisher) SignalingState() webrtc.SignalingState {

pkg/receiver.go

@@ -34,6 +34,7 @@ type Receiver interface {
 // WebRTCReceiver receives a video track
 type WebRTCReceiver struct {
 	sync.RWMutex
+
 	rtcpMu         sync.RWMutex
 	receiver       *webrtc.RTPReceiver
 	track          *webrtc.Track

pkg/simplesender.go

@@ -122,10 +122,6 @@ func (s *SimpleSender) WriteRTP(pkt *rtp.Packet) {
 		s.sdesMidHdrCtr++
 	}
 
-	if pkt.SequenceNumber%500 == 0 {
-		log.Tracef("rtp write sender %s with ssrc %d", s.id, s.track.SSRC())
-	}
-
 	if err := s.track.WriteRTP(&rtp.Packet{Header: h, Payload: pkt.Payload}); err != nil {
 		if err == io.ErrClosedPipe {
 			return

pkg/subscriber.go

@@ -160,10 +160,10 @@ func (s *Subscriber) SetRemoteDescription(desc webrtc.SessionDescription) error
 		return err
 	}
 
-	s.Lock()
-	defer s.Unlock()
 	if s.pendingSenders.Len() > 0 {
 		pendingStart := make([]Sender, 0, s.pendingSenders.Len())
+
+		s.Lock()
 		for _, md := range pd.MediaDescriptions {
 			if s.pendingSenders.Len() == 0 {
 				break
@@ -181,6 +181,8 @@ func (s *Subscriber) SetRemoteDescription(desc webrtc.SessionDescription) error
 				}
 			}
 		}
+		s.Unlock()
+
 		if len(pendingStart) > 0 {
 			defer func() {
 				if err == nil {
@@ -203,7 +205,6 @@ func (s *Subscriber) SetRemoteDescription(desc webrtc.SessionDescription) error
 		log.Errorf("SetRemoteDescription error: %v", err)
 		return err
 	}
-
 	return nil
 }