livoxProto1: udpCmdDemux now consults per-device handler registry

Device class objects now have a per-Device unordered_map of handlers
keyed by cmd_set+cmd_id.

commonLibs/livoxProto1/device.h

@@ -7,6 +7,7 @@
 #include <atomic>
 #include <optional>
 #include <functional>
+#include <unordered_map>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
@@ -16,6 +17,16 @@
 #include "protocol.h"
 #include <callback.h>
 
+// Custom hash function for std::pair<uint8_t, uint8_t>
+namespace std {
+	template<>
+	struct hash<std::pair<uint8_t, uint8_t>> {
+		size_t operator()(const std::pair<uint8_t, uint8_t>& p) const noexcept {
+			return (static_cast<size_t>(p.first) << 8) | static_cast<size_t>(p.second);
+		}
+	};
+}
+
 // Forward declaration
 namespace smo {
 	class ComponentThread;
@@ -146,10 +157,25 @@ public:
 		const uint8_t* data, ssize_t bytesReceived,
 		const struct sockaddr_in& senderAddr);
 
+	// Command handler registration
+	void registerUdpCommandHandler(
+		uint8_t cmd_set, uint8_t cmd_id,
+		std::function<void(
+			const uint8_t* data, ssize_t bytesReceived,
+			const struct sockaddr_in& senderAddr)> handler);
+	void unregisterUdpCommandHandler(uint8_t cmd_set, uint8_t cmd_id);
+
 private:
 	// Point cloud data setup
 	bool setupPcloudDataSocket();
 	void cleanupPcloudDataSocket();
+
+	// Command handler map
+	std::unordered_map<
+		std::pair<uint8_t, uint8_t>,
+		std::function<void(
+			const uint8_t* data, ssize_t bytesReceived,
+			const struct sockaddr_in& senderAddr)>> udpCommandHandlers;
 };
 
 } // namespace livoxProto1