feat: 支持HDMI关闭传输

server/src/Controllers/HdmiVideoStreamController.cs

@@ -60,4 +60,38 @@ public class HdmiVideoStreamController : ControllerBase
         var endpoint = _videoStreamService.GetVideoEndpoint(boardId.ToString());
         return Ok(endpoint);
     }
+
+    // 禁用指定板子的 HDMI 传输
+    [HttpPost("DisableHdmiTransmission")]
+    [Authorize]
+    public async Task<IActionResult> DisableHdmiTransmission()
+    {
+        var userName = User.FindFirstValue(ClaimTypes.Name);
+        if (string.IsNullOrEmpty(userName))
+            return Unauthorized("User name not found in claims.");
+
+        var db = new AppDataConnection();
+        if (db == null)
+            return NotFound("Database connection failed.");
+
+        var userRet = db.GetUserByName(userName);
+        if (!userRet.IsSuccessful || !userRet.Value.HasValue)
+            return NotFound("User not found.");
+
+        var user = userRet.Value.Value;
+        var boardId = user.BoardID;
+        if (boardId == Guid.Empty)
+            return NotFound("No board bound to this user.");
+
+        try
+        {
+            await _videoStreamService.DisableHdmiTransmissionAsync(boardId.ToString());
+            return Ok($"HDMI transmission for board {boardId} disabled.");
+        }
+        catch (Exception ex)
+        {
+            logger.Error(ex, $"Failed to disable HDMI transmission for board {boardId}");
+            return StatusCode(500, $"Error disabling HDMI transmission: {ex.Message}");
+        }
+    }
 }

server/src/Services/HttpHdmiVideoStreamService.cs

@@ -18,7 +18,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
     private HttpListener? _httpListener;
     private readonly int _serverPort = 4322;
     private readonly ConcurrentDictionary<string, HdmiIn> _hdmiInDict = new();
-    private bool _isEnabled = true;
+    private readonly ConcurrentDictionary<string, CancellationTokenSource> _hdmiInCtsDict = new();
 
     public override async Task StartAsync(CancellationToken cancellationToken)
     {
@@ -72,29 +72,33 @@ public class HttpHdmiVideoStreamService : BackgroundService
     public override async Task StopAsync(CancellationToken cancellationToken)
     {
         logger.Info("Stopping HDMI Video Stream Service...");
-        _isEnabled = false;
-        
+
         // 禁用所有活跃的HDMI传输
         var disableTasks = new List<Task>();
-        foreach (var hdmiIn in _hdmiInDict.Values)
+        foreach (var hdmiKey in _hdmiInDict.Keys)
         {
-            disableTasks.Add(DisableHdmiTransmissionAsync(hdmiIn));
+            disableTasks.Add(DisableHdmiTransmissionAsync(hdmiKey));
         }
-        
+
         // 等待所有禁用操作完成
         await Task.WhenAll(disableTasks);
-        
+
         // 清空字典
         _hdmiInDict.Clear();
-        
+        _hdmiInCtsDict.Clear();
+
         _httpListener?.Close(); // 立即关闭监听器，唤醒阻塞
         await base.StopAsync(cancellationToken);
     }
-    
-    private async Task DisableHdmiTransmissionAsync(HdmiIn hdmiIn)
+
+    public async Task DisableHdmiTransmissionAsync(string key)
     {
         try
         {
+            var cts = _hdmiInCtsDict[key];
+            cts.Cancel();
+
+            var hdmiIn = _hdmiInDict[key];
             var disableResult = await hdmiIn.EnableTrans(false);
             if (disableResult.IsSuccessful)
             {
@@ -134,7 +138,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
         var board = boardRet.Value.Value;
 
         hdmiIn = new HdmiIn(board.IpAddr, board.Port, 0); // taskID 可根据实际需求调整
-        
+
         // 启用HDMI传输
         try
         {
@@ -153,6 +157,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
         }
 
         _hdmiInDict[boardId] = hdmiIn;
+        _hdmiInCtsDict[boardId] = new CancellationTokenSource();
         return hdmiIn;
     }
 
@@ -173,13 +178,20 @@ public class HttpHdmiVideoStreamService : BackgroundService
             return;
         }
 
+        var hdmiInToken = _hdmiInCtsDict[boardId].Token;
+        if (hdmiInToken == null)
+        {
+            await SendErrorAsync(context.Response, "HDMI input is not available");
+            return;
+        }
+
         if (path == "/snapshot")
         {
-            await HandleSnapshotRequestAsync(context.Response, hdmiIn, cancellationToken);
+            await HandleSnapshotRequestAsync(context.Response, hdmiIn, hdmiInToken);
         }
         else if (path == "/mjpeg")
         {
-            await HandleMjpegStreamAsync(context.Response, hdmiIn, cancellationToken);
+            await HandleMjpegStreamAsync(context.Response, hdmiIn, hdmiInToken);
         }
         else if (path == "/video")
         {
@@ -218,7 +230,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
             var expectedLength = frameWidth * frameHeight * 2;
             if (rgb565Data.Length != expectedLength)
             {
-                logger.Warn("HDMI快照数据长度不匹配，期望: {Expected}, 实际: {Actual}", 
+                logger.Warn("HDMI快照数据长度不匹配，期望: {Expected}, 实际: {Actual}",
                     expectedLength, rgb565Data.Length);
             }
 
@@ -285,7 +297,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
             const int frameWidth = 960;  // HDMI输入分辨率
             const int frameHeight = 540;
 
-            while (!cancellationToken.IsCancellationRequested && _isEnabled)
+            while (!cancellationToken.IsCancellationRequested)
             {
                 try
                 {
@@ -381,7 +393,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
             {
                 logger.Error(ex, "禁用HDMI传输时出错");
             }
-            
+
             try
             {
                 response.Close();