I'm trying to achieve audio calling with WebRTC. The pods I have are:
pod 'Starscream', '~> 2.0.4'
pod 'libjingle_peerconnection'
When I try to send SDP received as an answer, it got failed. I'm here providing selected lines of code as it's too lengthy.
Connect Socket
self.socket?.connect()As socket get connected status, initialize WebRTC
func initalizeWebRTC() -> Void { print("----------------initalizeWebRTC----------------") RTCPeerConnectionFactory.initializeSSL() self.webRtcClient = RTCPeerConnectionFactory.init() let stunServer = self.defaultStunServer() let defaultConstraint = self.createDefaultConstraint() self.peerConnection = self.webRtcClient?.peerConnection(withICEServers: [stunServer], constraints: defaultConstraint, delegate: self) self.localVideoView.delegate = self self.remoteVideoView.delegate = self // webrtc initalized local rendering of video on self.addLocalMediaStrem() }Here are my configurations
func defaultStunServer() -> RTCICEServer { print("----------------defaultStunServer----------------") let url = URL.init(string: stunServer); let iceServer = RTCICEServer.init(uri: url, username: "", password: "") return iceServer! } func createAudioVideoConstraints() -> RTCMediaConstraints{ print("----------------createAudioVideoConstraints----------------") let audioOffer : RTCPair = RTCPair(key: "OfferToReceiveAudio", value: "true") let videoOffer : RTCPair = RTCPair(key: "OfferToReceiveVideo", value: "false") let dtlsSrtpKeyAgreement : RTCPair = RTCPair(key: "DtlsSrtpKeyAgreement", value: "true") let connectConstraints : RTCMediaConstraints = RTCMediaConstraints.init(mandatoryConstraints: [audioOffer,videoOffer], optionalConstraints: [dtlsSrtpKeyAgreement]) return connectConstraints } func createDefaultConstraint() -> RTCMediaConstraints { print("----------------createDefaultConstraint----------------") let dtlsSrtpKeyAgreement : RTCPair = RTCPair(key: "DtlsSrtpKeyAgreement", value: "true") let connectConstraints : RTCMediaConstraints = RTCMediaConstraints.init(mandatoryConstraints: nil, optionalConstraints: [dtlsSrtpKeyAgreement]) return connectConstraints }Create offer using WebRTC
self.peerConnection?.createOffer(with: self, constraints: constraint)Write data to socket
let offerDict = ["id":"joinRoomPresenter","name":fileName,"roomName":fileName,"isFrontCamera":"false","isMicroPhone":"false","isPhoneAudio":"false","isChat":"false","isOneToOneSession":"false","accessToken":"9289010e-d2d5-42e8-a95c-212f06aa9238","userId":"3459","fileName":fileName,"portalId":voiceCallID,"personName":fileName,"photoURL":"","sdpOffer":sdp.description] as [String : Any] socket?.write(string: offerDict.json)On success, I received sip as a message from socket.
["sdpAnswer": v=0
o=- 544328641767753251 2 IN IP4 104.248.181.233
s=VideoRoom 2623889018315199
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS janus
m=audio 9 UDP/TLS/RTP/SAVPF 111
c=IN IP4 104.248.181.233
a=recvonly
a=mid:audio
a=rtcp-mux
a=ice-ufrag:SJ8U
a=ice-pwd:72CaTpbKHUzwWj7rX64cGn
a=ice-options:trickle
a=fingerprint:sha-256 13:2A:57:AA:FC:AE:2B:44:86:1A:FD:FD:77:4A:11:BD:78:60:A3:4E:D1:98:3C:43:1C:71:82:C7:88:EE:01:CC
a=setup:active
a=rtpmap:111 opus/48000/2
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=msid:janus janusa0
a=ssrc:1319411670 cname:janus
a=ssrc:1319411670 msid:janus janusa0
a=ssrc:1319411670 mslabel:janus
a=ssrc:1319411670 label:janusa0
a=candidate:1 1 udp 2013266431 104.248.181.233 57307 typ host
a=candidate:2 1 udp 2013266430 10.46.0.9 56250 typ host
a=end-of-candidates
, "id": joinRoomPresenterResponse, "response": accepted]
I send the same sdp as an answer
self.peerConnection?.setRemoteDescriptionWith(self, sessionDescription: rtcSessionDesc!)I got the iceGathering state Changed to 2 (gathering). but after some seconds, iceConnection state Changed to 4 (failed)
Where I'm wrong?
