436 lines
15 KiB
C#
436 lines
15 KiB
C#
using System.Net;
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using System.Collections.Concurrent;
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using Peripherals.HdmiInClient;
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using Peripherals.JpegClient;
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namespace server.Services;
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public class HdmiVideoStreamEndpoint
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{
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public string BoardId { get; set; } = "";
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public string MjpegUrl { get; set; } = "";
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public string VideoUrl { get; set; } = "";
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public string SnapshotUrl { get; set; } = "";
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}
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public class HdmiVideoStreamClient
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{
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public required HdmiIn HdmiInClient { get; set; }
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public required Jpeg JpegClient { get; set; }
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public required CancellationTokenSource CTS { get; set; }
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public required int Offset { get; set; }
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public int Width { get; set; }
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public int Height { get; set; }
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}
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public class HttpHdmiVideoStreamService : BackgroundService
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{
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private readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
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private HttpListener? _httpListener;
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private readonly int _serverPort = 4322;
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private readonly ConcurrentDictionary<string, HdmiVideoStreamClient> _clientDict = new();
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public override async Task StartAsync(CancellationToken cancellationToken)
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{
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_httpListener = new HttpListener();
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_httpListener.Prefixes.Add($"http://{Global.LocalHost}:{_serverPort}/");
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_httpListener.Start();
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logger.Info($"HDMI Video Stream Service started on port {_serverPort}");
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await base.StartAsync(cancellationToken);
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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while (!stoppingToken.IsCancellationRequested)
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{
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if (_httpListener == null) continue;
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try
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{
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logger.Debug("Waiting for HTTP request...");
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var contextTask = _httpListener.GetContextAsync();
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var completedTask = await Task.WhenAny(contextTask, Task.Delay(-1, stoppingToken));
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if (completedTask == contextTask)
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{
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var context = contextTask.Result;
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logger.Debug($"Received request: {context.Request.Url?.AbsolutePath}");
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if (context != null)
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_ = HandleRequestAsync(context, stoppingToken);
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}
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else
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{
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break;
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}
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}
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catch (Exception ex)
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{
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logger.Error(ex, "Error in GetContextAsync");
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break;
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}
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}
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}
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public override async Task StopAsync(CancellationToken cancellationToken)
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{
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logger.Info("Stopping HDMI Video Stream Service...");
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// 禁用所有活跃的HDMI传输
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var disableTasks = new List<Task>();
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foreach (var hdmiKey in _clientDict.Keys)
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{
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disableTasks.Add(DisableHdmiTransmissionAsync(hdmiKey));
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}
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// 等待所有禁用操作完成
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await Task.WhenAll(disableTasks);
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// 清空字典
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_clientDict.Clear();
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await base.StopAsync(cancellationToken);
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}
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public async Task DisableHdmiTransmissionAsync(string key)
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{
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try
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{
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var client = _clientDict[key];
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client.CTS.Cancel();
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var disableResult = await client.JpegClient.SetEnable(false);
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if (disableResult)
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{
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logger.Info("Successfully disabled HDMI transmission");
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}
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else
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{
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logger.Error($"Failed to disable HDMI transmission");
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}
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}
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catch (Exception ex)
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{
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logger.Error(ex, "Exception occurred while disabling HDMI transmission");
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}
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}
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private async Task<HdmiVideoStreamClient?> GetOrCreateClientAsync(string boardId)
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{
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if (_clientDict.TryGetValue(boardId, out var client))
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{
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client.Width = client.JpegClient.Width;
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client.Height = client.JpegClient.Height;
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return client;
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}
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var userManager = new Database.UserManager();
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var boardRet = userManager.GetBoardByID(Guid.Parse(boardId));
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if (!boardRet.IsSuccessful || !boardRet.Value.HasValue)
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{
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logger.Error($"Failed to get board with ID {boardId}");
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return null;
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}
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var board = boardRet.Value.Value;
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client = new HdmiVideoStreamClient()
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{
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HdmiInClient = new HdmiIn(board.IpAddr, board.Port, 1),
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JpegClient = new Jpeg(board.IpAddr, board.Port, 1),
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CTS = new CancellationTokenSource(),
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Offset = 0
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};
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// 启用HDMI传输
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try
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{
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// var hdmiEnableRet = await client.JpegClient.EnableTrans(true);
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// if (!hdmiEnableRet.IsSuccessful)
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// {
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// logger.Error($"Failed to enable HDMI transmission for board {boardId}: {hdmiEnableRet.Error}");
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// return null;
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// }
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// logger.Info($"Successfully enabled HDMI transmission for board {boardId}");
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var jpegEnableRet = await client.JpegClient.Init(true);
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if (!jpegEnableRet.IsSuccessful)
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{
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logger.Error($"Failed to enable JPEG transmission for board {boardId}: {jpegEnableRet.Error}");
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return null;
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}
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logger.Info($"Successfully enabled JPEG transmission for board {boardId}");
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client.Width = client.JpegClient.Width;
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client.Height = client.JpegClient.Height;
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}
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catch (Exception ex)
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{
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logger.Error(ex, $"Exception occurred while enabling HDMI transmission for board {boardId}");
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return null;
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}
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_clientDict[boardId] = client;
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return client;
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}
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private async Task HandleRequestAsync(HttpListenerContext context, CancellationToken cancellationToken)
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{
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var path = context.Request.Url?.AbsolutePath ?? "/";
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var boardId = context.Request.QueryString["boardId"];
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if (string.IsNullOrEmpty(boardId))
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{
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await SendErrorAsync(context.Response, "Missing boardId");
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return;
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}
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var client = await GetOrCreateClientAsync(boardId);
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if (client == null)
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{
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await SendErrorAsync(context.Response, "Invalid boardId or board not available");
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return;
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}
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var hdmiInToken = _clientDict[boardId].CTS.Token;
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if (path == "/snapshot")
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{
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await HandleSnapshotRequestAsync(context.Response, client, hdmiInToken);
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}
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else if (path == "/mjpeg")
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{
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await HandleMjpegStreamAsync(context.Response, client, hdmiInToken);
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}
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else if (path == "/video")
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{
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await SendVideoHtmlPageAsync(context.Response, boardId);
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}
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else
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{
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await SendIndexHtmlPageAsync(context.Response, boardId);
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}
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}
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private async Task HandleSnapshotRequestAsync(
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HttpListenerResponse response, HdmiVideoStreamClient client, CancellationToken cancellationToken)
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{
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try
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{
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logger.Debug("处理HDMI快照请求");
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// 从HDMI读取RGB565数据
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var frameResult = await client.JpegClient.GetMultiFrames((uint)client.Offset);
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if (!frameResult.IsSuccessful || frameResult.Value == null || frameResult.Value.Count == 0)
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{
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logger.Error("HDMI快照获取失败");
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response.StatusCode = 500;
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var errorBytes = System.Text.Encoding.UTF8.GetBytes("Failed to get HDMI snapshot");
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await response.OutputStream.WriteAsync(errorBytes, 0, errorBytes.Length, cancellationToken);
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response.Close();
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return;
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}
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var jpegData = frameResult.Value[0];
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var jpegImage = Common.Image.CompleteJpegData(jpegData, client.Width, client.Height);
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if (!jpegImage.IsSuccessful)
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{
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logger.Error("JPEG数据补全失败");
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response.StatusCode = 500;
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var errorBytes = System.Text.Encoding.UTF8.GetBytes("Failed to complete JPEG data");
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await response.OutputStream.WriteAsync(errorBytes, 0, errorBytes.Length, cancellationToken);
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response.Close();
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return;
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}
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// 设置响应头（参考Camera版本）
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response.ContentType = "image/jpeg";
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response.ContentLength64 = jpegImage.Value.Length;
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response.Headers.Add("Cache-Control", "no-cache, no-store, must-revalidate");
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await response.OutputStream.WriteAsync(jpegImage.Value, 0, jpegImage.Value.Length, cancellationToken);
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await response.OutputStream.FlushAsync(cancellationToken);
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logger.Debug("已发送HDMI快照图像，大小：{Size} 字节", jpegImage.Value.Length);
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}
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catch (Exception ex)
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{
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logger.Error(ex, "处理HDMI快照请求时出错");
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response.StatusCode = 500;
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}
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finally
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{
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response.Close();
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}
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}
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private async Task HandleMjpegStreamAsync(
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HttpListenerResponse response, HdmiVideoStreamClient client, CancellationToken cancellationToken)
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{
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try
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{
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// 设置MJPEG流的响应头（参考Camera版本）
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response.ContentType = "multipart/x-mixed-replace; boundary=--boundary";
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response.Headers.Add("Cache-Control", "no-cache, no-store, must-revalidate");
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response.Headers.Add("Pragma", "no-cache");
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response.Headers.Add("Expires", "0");
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logger.Debug("开始HDMI MJPEG流传输");
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int frameCounter = 0;
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while (!cancellationToken.IsCancellationRequested)
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{
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var frameStartTime = DateTime.UtcNow;
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var frameResult =
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await client.JpegClient.GetMultiFrames((uint)client.Offset);
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if (!frameResult.IsSuccessful || frameResult.Value == null || frameResult.Value.Count == 0)
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{
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logger.Error("获取HDMI帧失败");
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await Task.Delay(100, cancellationToken);
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continue;
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}
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foreach (var framebytes in frameResult.Value)
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{
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var jpegImage = Common.Image.CompleteJpegData(framebytes, client.Width, client.Height);
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if (!jpegImage.IsSuccessful)
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{
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logger.Error("JPEG数据不完整");
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await Task.Delay(100, cancellationToken);
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continue;
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}
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var frameRet = Common.Image.CreateMjpegFrameFromJpeg(jpegImage.Value);
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if (!frameRet.IsSuccessful)
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{
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logger.Error("创建MJPEG帧失败");
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await Task.Delay(100, cancellationToken);
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continue;
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}
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var frame = frameRet.Value;
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await response.OutputStream.WriteAsync(frame.header, 0, frame.header.Length, cancellationToken);
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await response.OutputStream.WriteAsync(frame.data, 0, frame.data.Length, cancellationToken);
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await response.OutputStream.WriteAsync(frame.footer, 0, frame.footer.Length, cancellationToken);
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await response.OutputStream.FlushAsync(cancellationToken);
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frameCounter++;
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var totalTime = (DateTime.UtcNow - frameStartTime).TotalMilliseconds;
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// 性能统计日志（每30帧记录一次）
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if (frameCounter % 30 == 0)
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{
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logger.Debug("HDMI帧 {FrameNumber} 性能统计 - 总计: {TotalTime:F1}ms, JPEG大小: {JpegSize} 字节",
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frameCounter, totalTime, frame.data.Length);
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}
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}
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}
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}
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catch (Exception ex)
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{
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logger.Error(ex, "HDMI MJPEG流处理异常");
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}
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finally
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{
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try
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{
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// 停止传输时禁用HDMI传输
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await client.HdmiInClient.EnableTrans(false);
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logger.Info("已禁用HDMI传输");
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}
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catch (Exception ex)
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{
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logger.Error(ex, "禁用HDMI传输时出错");
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}
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try
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{
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response.Close();
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}
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catch
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{
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// 忽略关闭时的错误
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}
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logger.Debug("HDMI MJPEG流连接已关闭");
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}
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}
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private async Task SendVideoHtmlPageAsync(HttpListenerResponse response, string boardId)
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{
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string html = $@"<html><body>
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<h1>HDMI Video Stream for Board {boardId}</h1>
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<img src='/mjpeg?boardId={boardId}' />
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</body></html>";
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response.ContentType = "text/html";
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await response.OutputStream.WriteAsync(System.Text.Encoding.UTF8.GetBytes(html));
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response.Close();
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}
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private async Task SendIndexHtmlPageAsync(HttpListenerResponse response, string boardId)
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{
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string html = $@"<html><body>
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<h1>Welcome to HDMI Video Stream Service</h1>
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<a href='/video?boardId={boardId}'>View Video Stream for Board {boardId}</a>
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</body></html>";
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response.ContentType = "text/html";
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await response.OutputStream.WriteAsync(System.Text.Encoding.UTF8.GetBytes(html));
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response.Close();
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}
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private async Task SendErrorAsync(HttpListenerResponse response, string message)
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{
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response.StatusCode = 400;
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await response.OutputStream.WriteAsync(System.Text.Encoding.UTF8.GetBytes(message));
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response.Close();
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}
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/// <summary>
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/// 获取所有可用的HDMI视频流终端点
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/// </summary>
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/// <returns>返回所有可用的HDMI视频流终端点列表</returns>
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public List<HdmiVideoStreamEndpoint>? GetAllVideoEndpoints()
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{
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var userManager = new Database.UserManager();
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var boards = userManager.GetAllBoard();
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if (boards == null)
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return null;
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var endpoints = new List<HdmiVideoStreamEndpoint>();
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foreach (var board in boards)
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{
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endpoints.Add(new HdmiVideoStreamEndpoint
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{
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BoardId = board.ID.ToString(),
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MjpegUrl = $"http://{Global.LocalHost}:{_serverPort}/mjpeg?boardId={board.ID}",
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VideoUrl = $"http://{Global.LocalHost}:{_serverPort}/video?boardId={board.ID}",
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SnapshotUrl = $"http://{Global.LocalHost}:{_serverPort}/snapshot?boardId={board.ID}"
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});
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}
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return endpoints;
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}
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/// <summary>
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/// 获取指定板卡ID的HDMI视频流终端点
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/// </summary>
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/// <param name="boardId">板卡ID</param>
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/// <returns>返回指定板卡的HDMI视频流终端点</returns>
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public HdmiVideoStreamEndpoint GetVideoEndpoint(string boardId)
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{
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return new HdmiVideoStreamEndpoint
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{
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BoardId = boardId,
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MjpegUrl = $"http://{Global.LocalHost}:{_serverPort}/mjpeg?boardId={boardId}",
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VideoUrl = $"http://{Global.LocalHost}:{_serverPort}/video?boardId={boardId}",
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SnapshotUrl = $"http://{Global.LocalHost}:{_serverPort}/snapshot?boardId={boardId}"
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};
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}
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}
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