fabric-bridge: thread-safe startup, detailed Fabrics API logging

nodes/fabric-bridge/src/fabric_bridge_node.cpp

@@ -44,20 +44,30 @@ void FabricBridgeNode::configure(const nlohmann::json& params) {
 
     if (params.contains("target_info")) {
         target_info_str_ = params["target_info"].get<std::string>();
+        if (mode_ == FabricMode::Initiator && reader_.has_value() && !target_info_str_.empty()) {
+            start_requested_.store(true);
+            spdlog::info("Fabric-bridge: target_info set, signaling startup");
+        }
     }
 }
 
 void FabricBridgeNode::on_add_writer(const std::string& port_id, mxlFlowWriter writer) {
     if (port_id == "video_out") {
         writer_ = writer;
-        spdlog::info("Fabric-bridge: writer added (target mode)");
+        start_requested_.store(true);
+        spdlog::info("Fabric-bridge: writer added (target mode), signaling startup");
     }
 }
 
 void FabricBridgeNode::on_add_reader(const std::string& port_id, mxlFlowReader reader) {
     if (port_id == "video_in") {
         reader_ = reader;
-        spdlog::info("Fabric-bridge: reader added (initiator mode)");
+        if (mode_ == FabricMode::Initiator && !target_info_str_.empty()) {
+            start_requested_.store(true);
+            spdlog::info("Fabric-bridge: reader added (initiator mode), signaling startup");
+        } else {
+            spdlog::info("Fabric-bridge: reader added (initiator mode), waiting for target_info");
+        }
     }
 }
 
@@ -76,12 +86,11 @@ void FabricBridgeNode::on_remove_reader(const std::string& port_id) {
 }
 
 void FabricBridgeNode::process() {
-    if (!worker_thread_.has_value()) {
-        if (mode_ == FabricMode::Initiator && reader_.has_value() && !target_info_str_.empty()) {
+    if (!worker_thread_.has_value() && start_requested_.load()) {
         running_ = true;
+        if (mode_ == FabricMode::Initiator) {
             worker_thread_ = std::thread(&FabricBridgeNode::run_initiator, this);
-        } else if (mode_ == FabricMode::Target && writer_.has_value()) {
-            running_ = true;
+        } else {
             worker_thread_ = std::thread(&FabricBridgeNode::run_target, this);
         }
     }

nodes/fabric-bridge/src/fabric_bridge_node.hpp

@@ -57,6 +57,7 @@ private:
 
     std::optional<std::thread> worker_thread_;
     std::atomic<bool> running_{false};
+    std::atomic<bool> start_requested_{false};
 };
 
 } // namespace dmf_node