Method createJoinResponseLocked

pkg/rtc/room.go:1041–1070

(
	participant types.LocalParticipant,
	iceServers []*livekit.ICEServer,
)

}

func (r *Room) createJoinResponseLocked(
	participant types.LocalParticipant,
	iceServers []*livekit.ICEServer,
) *livekit.JoinResponse {
	iceConfig := participant.GetICEConfig()
	hasICEFallback := iceConfig.GetPreferencePublisher() != livekit.ICECandidateType_ICT_NONE || iceConfig.GetPreferenceSubscriber() != livekit.ICECandidateType_ICT_NONE
	return &livekit.JoinResponse{
		Room:        r.ToProto(),
		Participant: participant.ToProto(),
		OtherParticipants: GetOtherParticipantInfo(
			participant,
			false, // isMigratingIn
			toParticipants(slices.Collect(maps.Values(r.participants))),
			false, // skipSubscriberBroadcast
		),
		IceServers: iceServers,
		// indicates both server and client support subscriber as primary
		SubscriberPrimary:   participant.SubscriberAsPrimary(),
		ClientConfiguration: participant.GetClientConfiguration(),
		// sane defaults for ping interval & timeout
		PingInterval:         PingIntervalSeconds,
		PingTimeout:          PingTimeoutSeconds,
		ServerInfo:           r.serverInfo,
		ServerVersion:        r.serverInfo.Version,
		ServerRegion:         r.serverInfo.Region,
		SifTrailer:           r.trailer,
		EnabledPublishCodecs: participant.GetEnabledPublishCodecs(),
		FastPublish:          participant.CanPublish() && !hasICEFallback,
	}
}

// a ParticipantImpl in the room added a new track, subscribe other participants to it
func (r *Room) onTrackPublished(participant types.Participant, track types.MediaTrack) {