119 lines
4.4 KiB
Rust
119 lines
4.4 KiB
Rust
//! Temporary probe: replicate handle_whip_injest's Rtc setup, feed it a
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//! realistic OBS/libdatachannel WHIP offer, print the answer SDP and check
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//! whether the string-fixups in webrtc_ingest.rs actually match.
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use std::{net::SocketAddr, time::Instant};
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use str0m::{change::SdpOffer, net::Protocol, Candidate, Rtc};
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fn obs_like_offer() -> String {
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let mut s = String::new();
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s.push_str("v=0\r\n");
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s.push_str("o=- 4527835755568137757 2 IN IP4 127.0.0.1\r\n");
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s.push_str("s=-\r\n");
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s.push_str("t=0 0\r\n");
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s.push_str("a=group:BUNDLE 0 1\r\n");
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s.push_str("a=msid-semantic: WMS *\r\n");
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s.push_str("m=audio 9 UDP/TLS/RTP/SAVPF 111\r\n");
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s.push_str("c=IN IP4 0.0.0.0\r\n");
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s.push_str("a=rtcp:9 IN IP4 0.0.0.0\r\n");
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s.push_str("a=ice-ufrag:obs_ufrag_audio\r\n");
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s.push_str("a=ice-pwd:obs_pwd_audio\r\n");
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s.push_str("a=ice-options:trickle\r\n");
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s.push_str("a=fingerprint:sha-256 5A:6B:7C:8D:9E:AF:B0:C1:D2:E3:F4:05:16:27:38:49:5A:6B:7C:8D:9E:AF:B0:C1:D2:E3:F4:05:16:27:38:49:5A\r\n");
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s.push_str("a=setup:actpass\r\n");
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s.push_str("a=mid:0\r\n");
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s.push_str("a=sendrecv\r\n");
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s.push_str("a=rtcp-mux\r\n");
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s.push_str("a=rtpmap:111 opus/48000/2\r\n");
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s.push_str("a=rtcp-fb:111 transport-cc\r\n");
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s.push_str("a=fmtp:111 minptime=10;useinbandfec=1\r\n");
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s.push_str("m=video 9 UDP/TLS/RTP/SAVPF 96\r\n");
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s.push_str("c=IN IP4 0.0.0.0\r\n");
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s.push_str("a=rtcp:9 IN IP4 0.0.0.0\r\n");
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s.push_str("a=ice-ufrag:obs_ufrag_video\r\n");
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s.push_str("a=ice-pwd:obs_pwd_video\r\n");
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s.push_str("a=ice-options:trickle\r\n");
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s.push_str("a=fingerprint:sha-256 5A:6B:7C:8D:9E:AF:B0:C1:D2:E3:F4:05:16:27:38:49:5A:6B:7C:8D:9E:AF:B0:C1:D2:E3:F4:05:16:27:38:49:5A\r\n");
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s.push_str("a=setup:actpass\r\n");
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s.push_str("a=mid:1\r\n");
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s.push_str("a=sendrecv\r\n");
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s.push_str("a=rtcp-mux\r\n");
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s.push_str("a=rtpmap:96 H264/90000\r\n");
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s.push_str("a=rtcp-fb:96 nack\r\n");
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s.push_str("a=rtcp-fb:96 nack pli\r\n");
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s.push_str("a=rtcp-fb:96 transport-cc\r\n");
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s.push_str(
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"a=fmtp:96 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\r\n",
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);
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s
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}
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#[test]
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fn probe_whip_answer() {
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let offer_sdp = obs_like_offer();
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let sdp_offer = SdpOffer::from_sdp_string(&offer_sdp).expect("parse offer");
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// Mirror handle_whip_injest's builder setup.
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let mut builder = Rtc::builder();
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{
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let cc = builder.codec_config();
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cc.clear();
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cc.enable_opus(true);
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cc.enable_h264(true);
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}
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let mut rtc = builder.build(Instant::now());
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let public_addr: SocketAddr = "203.0.113.7:6969".parse().unwrap();
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let candidate = Candidate::host(public_addr, Protocol::Udp).unwrap();
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rtc.add_local_candidate(candidate);
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let answer = rtc.sdp_api().accept_offer(sdp_offer).expect("accept offer");
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let answer_sdp = answer.to_sdp_string();
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println!("=== RAW ANSWER ===");
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println!("{answer_sdp}");
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println!("=== END RAW ANSWER ===");
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// Now replicate the fixups from webrtc_ingest.rs verbatim.
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let answer_sdp = answer_sdp
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.replace("a=ice-options:trickle\r\n", "")
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.replace("a=ice-options:trickle\n", "");
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let answer_sdp = answer_sdp
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.replace("a=group:BUNDLE 0 1\r\n", "")
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.replace("a=group:BUNDLE 0 1\n", "");
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let answer_sdp =
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if let Some(cand_line) = answer_sdp.lines().find(|l| l.starts_with("a=candidate:")) {
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let cand_replacement = format!(
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"m=video 9 UDP/TLS/RTP/SAVPF 96\r\nc=IN IP4 127.0.0.1\r\n{}\r\n",
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cand_line
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);
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answer_sdp.replace(
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"m=video 9 UDP/TLS/RTP/SAVPF 96\r\nc=IN IP4 0.0.0.0\r\n",
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&cand_replacement,
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)
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} else {
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answer_sdp
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};
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println!("=== FIXED ANSWER ===");
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println!("{answer_sdp}");
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println!("=== END FIXED ANSWER ===");
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// Diagnostics
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let video_mline = answer_sdp
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.lines()
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.find(|l| l.starts_with("m=video"))
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.unwrap();
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println!("video m-line after fixup: {video_mline}");
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println!(
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"has a=candidate after fixup: {}",
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answer_sdp.lines().any(|l| l.starts_with("a=candidate:"))
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);
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println!(
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"a=candidate lines: {:?}",
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answer_sdp
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.lines()
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.filter(|l| l.starts_with("a=candidate:"))
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.collect::<Vec<_>>()
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);
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}
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