Add used SDP examples

elixir-webrtc · Sep 27, 2023 · 1439f77 · 1439f77
1 parent 66e474d
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Showing 5 changed files with 117 additions and 12 deletions.
diff --git a/examples/example.exs b/examples/example.exs
@@ -1,7 +1,7 @@
 Mix.install([{:gun, "~> 2.0.1"}, {:ex_webrtc, path: "./", force: true}, {:jason, "~> 1.4.0"}])
 
 require Logger
-Logger.configure(level: :debug)
+Logger.configure(level: :info)
 
 defmodule Peer do
   use GenServer

diff --git a/examples/example.js b/examples/example.js
@@ -13,7 +13,11 @@ const start_connection = async (ws) => {
   const pc = new RTCPeerConnection(pcConfig);
 
   pc.onconnectionstatechange = _ => console.log("Connection state changed:", pc.connectionState);
-
+  pc.onicecandidateerror = event => console.log("ICE candidate error:", event);
+  pc.oniceconnectionstatechange = _ => console.log("ICE connection state changed:", pc.iceConnectionState);
+  pc.onicegatheringstatechange = _ => console.log("ICE gathering state changed:", pc.iceGatheringState);
+  pc.onsignalingstatechange = _ => console.log("Signaling state changed:", pc.signalingState);
+  pc.ontrack = event => console.log("New track:", event);
   pc.onicecandidate = event => {
     console.log("New local ICE candidate:", event.candidate);
 
@@ -22,16 +26,17 @@ const start_connection = async (ws) => {
     }
   };
 
-  pc.ontrack = null;  // TODO
-
   ws.onmessage = event => {
     const msg = JSON.parse(event.data);
-    console.log("Received message:", msg);
 
     if (msg.type === "answer") {
+      console.log("Recieved SDP answer:", msg);
       pc.setRemoteDescription(msg);
     } else if (msg.type === "ice") {
+      console.log("Recieved remote ICE candidate:", msg.data);
       pc.addIceCandidate(msg.data);
+    } else {
+      console.log("Received unexpected message:", msg);
     }
   };
 

diff --git a/examples/sdp_answer.txt b/examples/sdp_answer.txt
@@ -0,0 +1,33 @@
+v=0
+o=- 7596991810024734139 2 IN IP4 127.0.0.1
+s=-
+t=0 0
+a=group:BUNDLE 0
+a=extmap-allow-mixed
+a=msid-semantic: WMS
+m=audio 9 UDP/TLS/RTP/SAVPF 111 63 9 0 8 13 110 126
+c=IN IP4 0.0.0.0
+a=rtcp:9 IN IP4 0.0.0.0
+a=ice-ufrag:vx/1
+a=ice-pwd:ldFUrCsXvndFY2L1u0UQ7ikf
+a=ice-options:trickle
+a=fingerprint:sha-256 76:61:77:1E:7C:2E:BB:CD:19:B5:27:4E:A7:40:84:06:6B:17:97:AB:C4:61:90:16:EE:96:9F:9E:BD:42:96:3D
+a=setup:passive
+a=mid:0
+a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
+a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
+a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
+a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid
+a=recvonly
+a=rtcp-mux
+a=rtpmap:111 opus/48000/2
+a=rtcp-fb:111 transport-cc
+a=fmtp:111 minptime=10;useinbandfec=1
+a=rtpmap:63 red/48000/2
+a=fmtp:63 111/111
+a=rtpmap:9 G722/8000
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:13 CN/8000
+a=rtpmap:110 telephone-event/48000
+a=rtpmap:126 telephone-event/8000
diff --git a/examples/sdp_offer.txt b/examples/sdp_offer.txt
@@ -0,0 +1,36 @@
+v=0
+o=- 8941027839948408955 2 IN IP4 127.0.0.1
+s=-
+t=0 0
+a=group:BUNDLE 0
+a=extmap-allow-mixed
+a=msid-semantic: WMS 4d0a4923-289d-4f4c-931a-c72db00c055f
+m=audio 9 UDP/TLS/RTP/SAVPF 111 63 9 0 8 13 110 126
+c=IN IP4 0.0.0.0
+a=rtcp:9 IN IP4 0.0.0.0
+a=ice-ufrag:q1Cp
+a=ice-pwd:AazQ7Pof8R7suS3j9aod8DjV
+a=ice-options:trickle
+a=fingerprint:sha-256 42:85:3D:4C:72:D6:C2:5B:AE:EE:7F:6A:53:7C:04:63:6E:B9:55:18:46:E5:82:31:57:EE:21:F0:E7:60:82:CD
+a=setup:actpass
+a=mid:0
+a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
+a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
+a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
+a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid
+a=sendrecv
+a=msid:4d0a4923-289d-4f4c-931a-c72db00c055f 6a7555a6-7a70-4196-a58f-89567c49b12d
+a=rtcp-mux
+a=rtpmap:111 opus/48000/2
+a=rtcp-fb:111 transport-cc
+a=fmtp:111 minptime=10;useinbandfec=1
+a=rtpmap:63 red/48000/2
+a=fmtp:63 111/111
+a=rtpmap:9 G722/8000
+a=rtpmap:0 PCMU/8000
+a=rtpmap:8 PCMA/8000
+a=rtpmap:13 CN/8000
+a=rtpmap:110 telephone-event/48000
+a=rtpmap:126 telephone-event/8000
+a=ssrc:2776039216 cname:1qch+ontR0BspBY6
+a=ssrc:2776039216 msid:4d0a4923-289d-4f4c-931a-c72db00c055f 6a7555a6-7a70-4196-a58f-89567c49b12d
diff --git a/lib/ex_webrtc/peer_connection.ex b/lib/ex_webrtc/peer_connection.ex
@@ -24,6 +24,42 @@ defmodule ExWebRTC.PeerConnection do
                 signaling_state: :stable
               ]
 
+  @dummy_sdp "
+  v=0\r\n
+  o=- 7596991810024734139 2 IN IP4 127.0.0.1\r\n
+  s=-\r\n
+  t=0 0\r\n
+  a=group:BUNDLE 0\r\n
+  a=extmap-allow-mixed\r\n
+  a=msid-semantic: WMS\r\n
+  m=audio 9 UDP/TLS/RTP/SAVPF 111 63 9 0 8 13 110 126\r\n
+  c=IN IP4 0.0.0.0\r\n
+  a=rtcp:9 IN IP4 0.0.0.0\r\n
+  a=ice-ufrag:vx/1\r\n
+  a=ice-pwd:ldFUrCsXvndFY2L1u0UQ7ikf\r\n
+  a=ice-options:trickle\r\n
+  a=fingerprint:sha-256 76:61:77:1E:7C:2E:BB:CD:19:B5:27:4E:A7:40:84:06:6B:17:97:AB:C4:61:90:16:EE:96:9F:9E:BD:42:96:3D\r\n
+  a=setup:passive\r\n
+  a=mid:0\r\n
+  a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\n
+  a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\n
+  a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\n
+  a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\r\n
+  a=recvonly\r\n
+  a=rtcp-mux\r\n
+  a=rtpmap:111 opus/48000/2\r\n
+  a=rtcp-fb:111 transport-cc\r\n
+  a=fmtp:111 minptime=10;useinbandfec=1\r\n
+  a=rtpmap:63 red/48000/2\r\n
+  a=fmtp:63 111/111\r\n
+  a=rtpmap:9 G722/8000\r\n
+  a=rtpmap:0 PCMU/8000\r\n
+  a=rtpmap:8 PCMA/8000\r\n
+  a=rtpmap:13 CN/8000\r\n
+  a=rtpmap:110 telephone-event/48000\r\n
+  a=rtpmap:126 telephone-event/8000\r\n
+  "
+
   #### API ####
 
   def start_link(configuration \\ []) do
@@ -71,6 +107,7 @@ defmodule ExWebRTC.PeerConnection do
     config = struct(Configuration, config)
     :ok = Configuration.check_support(config)
 
+    # ATM, ExICE does not support relay via TURN
     stun_servers =
       config.ice_servers
       |> Enum.flat_map(&if(is_list(&1.urls), do: &1.urls, else: [&1.urls]))
@@ -90,14 +127,9 @@ defmodule ExWebRTC.PeerConnection do
   @impl true
   def handle_call({:create_answer, _options}, _from, state)
       when state.signaling_state in [:have_remote_offer, :have_local_pranswer] do
-    # hardcoded answer based generated by chrome with no added tracks
-    # in response to offer also generated by chrome with 1 audio track
     {:ok, ufrag, pwd} = ICEAgent.get_local_credentials(state.ice_agent)
 
-    test_answer =
-      "v=0\r\no=- 7596991810024734139 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE 0\r\na=extmap-allow-mixed\r\na=msid-semantic: WMS\r\nm=audio 9 UDP/TLS/RTP/SAVPF 111 63 9 0 8 13 110 126\r\nc=IN IP4 0.0.0.0\r\na=rtcp:9 IN IP4 0.0.0.0\r\na=ice-ufrag:vx/1\r\na=ice-pwd:ldFUrCsXvndFY2L1u0UQ7ikf\r\na=ice-options:trickle\r\na=fingerprint:sha-256 76:61:77:1E:7C:2E:BB:CD:19:B5:27:4E:A7:40:84:06:6B:17:97:AB:C4:61:90:16:EE:96:9F:9E:BD:42:96:3D\r\na=setup:active\r\na=mid:0\r\na=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\na=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\na=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01\r\na=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid\r\na=recvonly\r\na=rtcp-mux\r\na=rtpmap:111 opus/48000/2\r\na=rtcp-fb:111 transport-cc\r\na=fmtp:111 minptime=10;useinbandfec=1\r\na=rtpmap:63 red/48000/2\r\na=fmtp:63 111/111\r\na=rtpmap:9 G722/8000\r\na=rtpmap:0 PCMU/8000\r\na=rtpmap:8 PCMA/8000\r\na=rtpmap:13 CN/8000\r\na=rtpmap:110 telephone-event/48000\r\na=rtpmap:126 telephone-event/8000\r\n"
-
-    sdp = ExSDP.parse!(test_answer)
+    sdp = ExSDP.parse!(@dummy_sdp)
     media = hd(sdp.media)
 
     attrs =
@@ -148,7 +180,6 @@ defmodule ExWebRTC.PeerConnection do
     end
   end
 
-  @impl true
   def handle_call({:add_ice_candidate, candidate}, _from, state) do
     with "candidate:" <> attr <- candidate.candidate do
       ICEAgent.add_remote_candidate(state.ice_agent, attr)