func onRecvCustomCmdMsgUserId(_ userId: String, cmdID: Int, seq: UInt32, message: Data) {
    if cmdID == 1 {
        do {
            if let jsonObject = try JSONSerialization.jsonObject(with: message, options: []) as? [String: Any] {
                print("Dictionary: \\(jsonObject)")
            } else {
                print("The data is not a dictionary.")
            }
        } catch {
            print("Error parsing JSON: \\(error)")
        }
    }
}

trtcClient.on(TRTC.EVENT.CUSTOM_MESSAGE, (event) => {
    let data = new TextDecoder().decode(event.data);
    let jsonData = JSON.parse(data);
    console.log(`receive custom msg from ${event.userId} cmdId: ${event.cmdId} seq: ${event.seq} data: ${data}`);
        
    if (jsonData.type == 10000 && jsonData.payload.end == false) {
        // 字幕中间状态
    } else if (jsonData.type == 10000 && jsonData.payload.end == true) {
       //  一句话说完了 
    }
});

void onRecvCustomCmdMsg(const char* userId, int cmdID, int seq,
                            const uint8_t* message, uint32_t msgLen) {
        std::string data;
        if (message != nullptr && msgLen > 0) {
            data.assign(reinterpret_cast<const char*>(message), msgLen);
        }
        if (cmdID == 1) {
            try {
                auto j = nlohmann::json::parse(data);
                std::cout << "Dictionary: " << j.dump() << std::endl;
            } catch (const std::exception& e) {
                std::cerr << "Error parsing JSON: " << e.what() << std::endl;
            }
            return;
        }
}

void onRecvCustomCmdMsg(String userId, int cmdID, int seq, String message) {
  if (cmdID == 1) {
    try {
      final decoded = json.decode(message);
      if (decoded is Map<String, dynamic>) {
        print('Dictionary: $decoded');
      } else {
        print('The data is not a dictionary. Raw: $decoded');
      }
    } catch (e) {
      print('Error parsing JSON: $e');
    }
    return;
  }
}