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Populate RTPTransceiver stopped flag #2336

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Populate RTPTransceiver stopped flag #2336

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14 changes: 6 additions & 8 deletions peerconnection.go
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Expand Up @@ -379,15 +379,15 @@ func (pc *PeerConnection) checkNegotiationNeeded() bool { //nolint:gocognit
for _, t := range pc.rtpTransceivers {
// https://www.w3.org/TR/webrtc/#dfn-update-the-negotiation-needed-flag
// Step 5.1
// if t.stopping && !t.stopped {
// if t.stopping && !t.IsStopped() {
// return true
// }
m := getByMid(t.Mid(), localDesc)
// Step 5.2
if !t.stopped && m == nil {
if !t.IsStopped() && m == nil {
return true
}
if !t.stopped && m != nil {
if !t.IsStopped() && m != nil {
// Step 5.3.1
if t.Direction() == RTPTransceiverDirectionSendrecv || t.Direction() == RTPTransceiverDirectionSendonly {
descMsid, okMsid := m.Attribute(sdp.AttrKeyMsid)
Expand Down Expand Up @@ -416,7 +416,7 @@ func (pc *PeerConnection) checkNegotiationNeeded() bool { //nolint:gocognit
}
}
// Step 5.4
if t.stopped && t.Mid() != "" {
if t.IsStopped() && t.Mid() != "" {
if getByMid(t.Mid(), localDesc) != nil || getByMid(t.Mid(), remoteDesc) != nil {
return true
}
Expand Down Expand Up @@ -1765,7 +1765,7 @@ func (pc *PeerConnection) AddTrack(track TrackLocal) (*RTPSender, error) {
// transceiver can be reused only if it's currentDirection never be sendrecv or sendonly.
// But that will cause sdp inflate. So we only check currentDirection's current value,
// that's worked for all browsers.
if !t.stopped && t.kind == track.Kind() && t.Sender() == nil &&
if !t.IsStopped() && t.kind == track.Kind() && t.Sender() == nil &&
!(currentDirection == RTPTransceiverDirectionSendrecv || currentDirection == RTPTransceiverDirectionSendonly) {
sender, err := pc.api.NewRTPSender(track, pc.dtlsTransport)
if err == nil {
Expand Down Expand Up @@ -2025,9 +2025,7 @@ func (pc *PeerConnection) Close() error {
// https://www.w3.org/TR/webrtc/#dom-rtcpeerconnection-close (step #4)
pc.mu.Lock()
for _, t := range pc.rtpTransceivers {
if !t.stopped {
closeErrs = append(closeErrs, t.Stop())
}
closeErrs = append(closeErrs, t.Stop())
}
pc.mu.Unlock()

Expand Down
15 changes: 12 additions & 3 deletions rtptransceiver.go
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Expand Up @@ -21,8 +21,8 @@ type RTPTransceiver struct {

codecs []RTPCodecParameters // User provided codecs via SetCodecPreferences

stopped bool
kind RTPCodecType
isStopped *atomicBool
kind RTPCodecType

api *API
mu sync.RWMutex
Expand All @@ -35,7 +35,7 @@ func newRTPTransceiver(
kind RTPCodecType,
api *API,
) *RTPTransceiver {
t := &RTPTransceiver{kind: kind, api: api}
t := &RTPTransceiver{kind: kind, api: api, isStopped: &atomicBool{}}
t.setReceiver(receiver)
t.setSender(sender)
t.setDirection(direction)
Expand Down Expand Up @@ -150,6 +150,10 @@ func (t *RTPTransceiver) Direction() RTPTransceiverDirection {

// Stop irreversibly stops the RTPTransceiver
func (t *RTPTransceiver) Stop() error {
if t.isStopped.swap(true) {
return nil
}

if sender := t.Sender(); sender != nil {
if err := sender.Stop(); err != nil {
return err
Expand All @@ -166,6 +170,11 @@ func (t *RTPTransceiver) Stop() error {
return nil
}

// IsStopped returns true if RTPTransceiver is stopped, else returns false
func (t *RTPTransceiver) IsStopped() bool {
return t.isStopped.get()
}

func (t *RTPTransceiver) setReceiver(r *RTPReceiver) {
if r != nil {
r.setRTPTransceiver(t)
Expand Down