godot-webrtc-mplayer-testing/scripts/global/webrtc_negotiator.gd

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GDScript3
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extends Node
"""
This module sets up WebRTC peer connections.
"""
onready var webrtc = WebRTCMultiplayer.new()
var signaller_client = null
var ice_servers = null
func _init(_ice_servers, _signaller_client):
ice_servers = _ice_servers
signaller_client = _signaller_client
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print("Initializing WebRTCNegotiator with ICE servers: %s" % ice_servers)
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func _ready():
signaller_client.connect("offer_received", self, "_offer_received")
signaller_client.connect("answer_received", self, "_answer_received")
signaller_client.connect("candidate_received", self, "_candidate_received")
# signaller_client.connect("websocket_disconnected", self, "disconnected")
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signaller_client.connect("peer_init", self, "_peer_id_set")
signaller_client.connect("peer_data", self, "_peer_data")
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# webrtc.connect("peer_disconnected", self, "peer_disconnected")
# connect("lobby_sealed", self, "lobby_sealed")
add_child(self.signaller_client)
func close():
webrtc.close()
signaller_client.close()
func connect_to_signaller():
signaller_client.connect_websocket()
func _create_peer(peer_id):
# if peer_id == signaller_client.peer_id: return
var peer: WebRTCPeerConnection = WebRTCPeerConnection.new()
print("New Net Peer with peer_id %d" % [peer_id])
var _peer_init_results = peer.initialize({"iceServers": ice_servers})
var _result = peer.connect("session_description_created", self, "_offer_created", [peer_id])
_result = peer.connect("ice_candidate_created", self, "_new_ice_candidate", [peer_id])
webrtc.add_peer(peer, peer_id)
var uid = webrtc.get_unique_id()
if peer_id > uid:
var offer_result = peer.create_offer()
print("Create Offer Result: %s" % offer_result)
else:
print("Did not create offer: %d <= %d" % [peer_id, uid])
return peer
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func _new_ice_candidate(mid, index, sdp, peer_id):
print("New ICE Candidate - MID: %s, Index: %s, SDP: %s, PeerID: %s" % [mid, index, sdp, peer_id])
signaller_client.send_candidate(peer_id, mid, index, sdp)
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func _offer_created(type, data, peer_id):
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print("%s created - PeerID: %s, Data: %s" % [type, peer_id, JSON.print(data)])
if not webrtc.has_peer(peer_id): return
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webrtc.get_peer(peer_id).connection.set_local_description(type, data)
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if type == "offer": signaller_client.send_offer(peer_id, data)
else: signaller_client.send_answer(peer_id, data)
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func _peer_id_set(peer_id):
print("Peer ID received %s - setting up to peer..." % [peer_id])
webrtc.initialize(peer_id, true)
get_tree().network_peer = webrtc
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func _peer_data(peers):
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for i in range(len(peers)):
var peer = peers[i]
if peer.has("peerId"):
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var peer_id = peer.peerId
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if not webrtc.has_peer(peer_id):
_create_peer(peer_id)
func peer_disconnected(id):
print("Peer %s disconnected" % id)
if webrtc.has_peer(id):
webrtc.remove_peer(id)
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func _offer_received(data):
var id = data.peerId
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if webrtc.has_peer(id):
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print("Setting offer remote description: %s" % JSON.print(data.offer))
webrtc.get_peer(id).connection.set_remote_description("offer", data.offer)
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else:
print("Received an offer for a peer with ID %s that hasn't been added" % id)
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func _answer_received(data):
var id = data.peerId
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if webrtc.has_peer(id):
print("Setting answer remote description: %s" % JSON.print(data))
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webrtc.get_peer(id).connection.set_remote_description("answer", data.answer)
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func _candidate_received(data):
var id = data.peerId
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if webrtc.has_peer(id):
print("Adding ice candidate: %s" % JSON.print(data))
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webrtc.get_peer(id).connection.add_ice_candidate(data.mid, data.index, data.sdp)
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else:
print("Received candidate for non-existant peer %s" % id)