adding single peer connection support

include/livekit/room.h

@@ -73,6 +73,11 @@ struct RoomOptions {
   // Enable dynacast (server sends optimal layers depending on subscribers).
   bool dynacast = false;
 
+  // Enable single peer connection mode. When true, uses one RTCPeerConnection
+  // for both publishing and subscribing instead of two separate connections.
+  // Falls back to dual peer connection if the server doesn't support single PC.
+  bool single_peer_connection = true;
+
   // Optional WebRTC configuration (ICE policy, servers, etc.)
   std::optional<RtcConfig> rtc_config;
 

src/ffi_client.cpp

@@ -317,6 +317,7 @@ FfiClient::connectAsync(const std::string &url, const std::string &token,
   auto *opts = connect->mutable_options();
   opts->set_auto_subscribe(options.auto_subscribe);
   opts->set_dynacast(options.dynacast);
+  opts->set_single_peer_connection(options.single_peer_connection);
   // --- E2EE / encryption (optional) ---
   if (options.encryption.has_value()) {
     const E2EEOptions &e2ee = *options.encryption;