Delphi RTCPeerConnection
Talk WebRTC from Delphi/C++Builder — ICE for connectivity, DTLS for the keying handshake, SRTP for media, SCTP-over-DTLS for DataChannels. No browser required.
Talk WebRTC from Delphi/C++Builder — ICE for connectivity, DTLS for the keying handshake, SRTP for media, SCTP-over-DTLS for DataChannels. No browser required.
Native Delphi WebRTC peer — mirrors the W3C RTCPeerConnection surface (CreateOffer / CreateAnswer / SetRemoteDescription / AddIceCandidate / DataChannel) backed by the bundled ICE, DTLS, SRTP and SCTP stacks.
TsgcRTCPeerConnection
Windows, macOS, Linux, iOS, Android
Enterprise for the component, plus the sgcWebRTC pack for offer and answer, DataChannels and tracks. Both ship in All-Access.
The Enterprise block of sgcVer.inc defines SGC_ICE, SGC_DTLS, SGC_RTCPEERCONNECTION and SGC_TURN, which is what puts TsgcRTCPeerConnection on the palette and gives it an ICE and TURN transport. The offer and answer methods, the DataChannel API and the media API sit inside SGC_SDP, SGC_DATACHANNEL and SGC_RTP, and only SGC_PACK_WEBRTC defines those. They need the sgcWebRTC pack on top of Enterprise, or All-Access, which enables the pack for you.
Fill RTCOptions.ICEServers, call CreateOffer, send the SDP that OnLocalDescription hands you to the remote peer over your signalling channel, set the answer that comes back, and the data path lights up.
uses
sgcP2P, sgcP2P_DataChannel;
// TFormPeer holds FPeer, FChannel, FIncoming: TStringList and the handlers
procedure TFormPeer.CreatePeer;
begin
FPeer := TsgcRTCPeerConnection.Create(nil);
FPeer.RTCOptions.ICEServers.AddURL('stun:stun.l.google.com:19302');
FPeer.RTCOptions.ICE.TURN := False; // no TURN server yet
FPeer.OnLocalDescription := OnLocalDescription;
FPeer.OnDataChannel := OnDataChannel;
// outbound side. CreateDataChannel turns RTCOptions.DTLS on
FChannel := FPeer.CreateDataChannel('chat');
FChannel.OnMessage := OnChannelMessage;
FPeer.CreateOffer;
end;
procedure TFormPeer.OnLocalDescription(Sender: TObject;
const aType, aSDP: string);
begin
// aType is 'offer' or 'answer'
SignalToPeer(aType, aSDP); // over your WebSocket signalling channel
end;
procedure TFormPeer.OnDataChannel(Sender: TObject;
aChannel: TsgcRTCDataChannel);
begin
FChannel := aChannel;
FChannel.OnMessage := OnChannelMessage;
end;
procedure TFormPeer.OnChannelMessage(Sender: TObject;
const aText: string);
begin
// fires on a worker thread, marshal before you touch a control
FIncoming.Add(aText);
end;// includes: sgcP2P.hpp, sgcP2P_DataChannel.hpp
TsgcRTCPeerConnection *Peer = new TsgcRTCPeerConnection(this);
Peer->RTCOptions->ICEServers->AddURL("stun:stun.l.google.com:19302");
Peer->RTCOptions->ICE->TURN = false; // no TURN server yet
Peer->OnLocalDescription = OnLocalDescription;
Peer->OnDataChannel = OnDataChannel;
TsgcRTCDataChannel *Channel = Peer->CreateDataChannel("chat");
Peer->CreateOffer();
void __fastcall TFormPeer::OnLocalDescription(TObject *Sender,
const String aType, const String aSDP)
{
SignalToPeer(aType, aSDP); // over your WebSocket signalling channel
}
void __fastcall TFormPeer::OnDataChannel(TObject *Sender,
TsgcRTCDataChannel *aChannel)
{
aChannel->OnMessage = OnChannelMessage;
}A native WebRTC peer that bundles ICE, DTLS, SRTP and SCTP into a single component — mirroring the W3C RTCPeerConnection API.
CreateOffer and CreateAnswer generate RFC 8866 SDP with the right ICE-UFRAG / ICE-PWD / FINGERPRINT / SETUP attributes; SetRemoteDescription ingests the peer's SDP.
Uses TsgcICEClient internally for candidate gathering and connectivity checks; AddIceCandidate feeds remote candidates as they trickle in from signalling.
Once the selected ICE pair becomes writable the component runs a DTLS handshake (RFC 6347) and exports the SRTP keying material with the RFC 5764 EXTRACTOR-dtls_srtp label. RTCOptions.DTLS defaults to False, and CreateDataChannel turns it on for you.
CreateDataChannel opens an SCTP stream multiplexed over DTLS — reliable / partial-reliable, ordered / unordered, with backpressure via BufferedAmount.
AddTrack publishes an audio or video track and OnTrack receives the remote one, both over SRTP. The companion TsgcWSPServer_RTCPeerConnection is the WebSocket signalling broker: it pairs a caller with a callee and relays their SDP and their candidates.
Interops with browser RTCPeerConnection — tested against Chromium / Firefox / Safari. Same SDP semantics, same ICE candidates, same DataChannel wire format.
Authoritative sources for the protocol this component implements.
Deep-link to the component reference, grab the ready-to-run demo project, and download the trial.
| Online Help — TsgcRTCPeerConnection Full property, method and event reference for this component. | Open | |
| Demo Project — Demos\35.P2P\05.RTCPeerConnection Ready-to-run example project. Ships inside the sgcWebSockets package — download the trial below. | Open | |
| Technical Document (PDF) Features, quick start, code samples for Delphi & C++ Builder and primary-source references — this component only. | Open | |
| User Manual (PDF) Comprehensive manual covering every component in the library. | Open |