Exemplo n.º 1
0
        private static void WatchFaces(string directory, bool debug, Machine machine)
        {
            var lastSeen   = new Dictionary <string, DateTime>();
            var repeatTime = double.Parse(config["faceRepeatSeconds"]);
            var watcher    = new FileSystemWatcher(directory)
            {
                IncludeSubdirectories = true, EnableRaisingEvents = true
            };
            var    wait      = new EventWaitHandle(false, EventResetMode.AutoReset);
            string imagePath = null;

            watcher.Created += (_, e) =>
            {
                imagePath = e.FullPath;
                wait.Set();
                if (debug)
                {
                    Console.WriteLine($"Image: {imagePath}");
                }
            };

            (new Thread(new ThreadStart(() =>
            {
                while (true)
                {
                    wait.WaitOne();
                    if (debug)
                    {
                        Console.WriteLine($"Face reco {imagePath}");
                    }
                    byte[] image = null;
                    var attempt = 3;
                    do
                    {
                        try
                        {
                            image = File.ReadAllBytes(imagePath);
                            break;
                        }
                        catch (Exception)
                        {
                            Thread.Sleep(100); // file lock
                        }
                    } while (attempt-- > 0);

                    if (image != null)
                    {
                        foreach (var f in faces.RecoFaces(image, debug))
                        {
                            if (debug)
                            {
                                Console.WriteLine($"Recognized {f}");
                            }
                            var last = lastSeen.ContainsKey(f) ? lastSeen[f] : DateTime.MinValue;
                            if ((DateTime.Now - last).TotalSeconds > repeatTime)
                            {
                                var key = $"faceGreeting.{f}";
                                var cmd = config.ContainsKey(key) ? config[key] : config["faceGreeting.default"];
                                machine.Execute(String.Format(cmd, f));
                            }
                            else
                            {
                                if (debug)
                                {
                                    Console.WriteLine("  Already seen recently...");
                                }
                            }
                            lastSeen[f] = DateTime.Now;
                        }
                    }
                }
            }))
            {
                IsBackground = true
            }).Start();
        }