feat: 完成jpeg读取后端

server/src/Common/Image.cs

@@ -72,7 +72,7 @@ public class Image
                 var b8 = (byte)((b5 * 255) / 31);  // 5位扩展到8位
 
                 // 存储到 RGB24 数组
-                var rgb24Index = (i%2 == 0)?((i+1) * 3):((i-1) * 3);
+                var rgb24Index = (i % 2 == 0) ? ((i + 1) * 3) : ((i - 1) * 3);
                 rgb24Data[rgb24Index] = r8;     // R
                 rgb24Data[rgb24Index + 1] = g8; // G
                 rgb24Data[rgb24Index + 2] = b8; // B
@@ -255,13 +255,169 @@ public class Image
         return Encoding.ASCII.GetBytes("\r\n");
     }
 
+    /// <summary>
+    /// 将原始 JPEG 数据补全 JPEG 头部，生成完整的 JPEG 图片
+    /// </summary>
+    /// <param name="jpegData">原始 JPEG 数据（可能缺少完整头部）</param>
+    /// <param name="width">图像宽度</param>
+    /// <param name="height">图像高度</param>
+    /// <param name="quality">JPEG质量（1-100，默认80）</param>
+    /// <returns>完整的 JPEG 图片数据</returns>
+    public static Result<byte[]> CompleteJpegData(byte[] jpegData, int width, int height, int quality = 80)
+    {
+        if (jpegData == null)
+            return new(new ArgumentNullException(nameof(jpegData)));
+
+        if (width <= 0 || height <= 0)
+            return new(new ArgumentException("Width and height must be positive"));
+
+        if (quality < 1 || quality > 100)
+            return new(new ArgumentException("Quality must be between 1 and 100"));
+
+        try
+        {
+            // 检查是否已经是完整的 JPEG 文件（以 FFD8 开头，FFD9 结尾）
+            if (jpegData.Length >= 4 &&
+                jpegData[0] == 0xFF && jpegData[1] == 0xD8 &&
+                jpegData[jpegData.Length - 2] == 0xFF && jpegData[jpegData.Length - 1] == 0xD9)
+            {
+                // 已经是完整的 JPEG 文件，直接返回
+                return jpegData;
+            }
+
+            // 创建一个临时的 RGB24 图像用于生成 JPEG 头部
+            using var tempImage = new SixLabors.ImageSharp.Image<Rgb24>(new Configuration
+            {
+
+            }, width, height);
+
+            // 填充临时图像（使用简单的渐变色作为占位符）
+            for (int y = 0; y < height; y++)
+            {
+                for (int x = 0; x < width; x++)
+                {
+                    tempImage[x, y] = new Rgb24((byte)(x % 256), (byte)(y % 256), 128);
+                }
+            }
+
+            using var stream = new MemoryStream();
+            tempImage.SaveAsJpeg(stream, new JpegEncoder { Quality = quality });
+            var completeJpeg = stream.ToArray();
+
+            // 如果原始数据看起来是 JPEG 扫描数据，尝试替换扫描数据部分
+            if (jpegData.Length > 0)
+            {
+                // 查找 JPEG 扫描数据开始位置（SOS 标记 0xFFDA 后）
+                int sosIndex = -1;
+                for (int i = 0; i < completeJpeg.Length - 1; i++)
+                {
+                    if (completeJpeg[i] == 0xFF && completeJpeg[i + 1] == 0xDA)
+                    {
+                        // 跳过 SOS 段头部，找到实际扫描数据开始位置
+                        i += 2; // 跳过 FF DA
+                        if (i < completeJpeg.Length - 1)
+                        {
+                            int segmentLength = (completeJpeg[i] << 8) | completeJpeg[i + 1];
+                            sosIndex = i + segmentLength;
+                            break;
+                        }
+                    }
+                }
+
+                // 查找 EOI 标记位置（0xFFD9）
+                int eoiIndex = -1;
+                for (int i = completeJpeg.Length - 2; i >= 0; i--)
+                {
+                    if (completeJpeg[i] == 0xFF && completeJpeg[i + 1] == 0xD9)
+                    {
+                        eoiIndex = i;
+                        break;
+                    }
+                }
+
+                if (sosIndex > 0 && eoiIndex > sosIndex)
+                {
+                    // 替换扫描数据部分
+                    var headerLength = sosIndex;
+                    var footerStart = eoiIndex;
+                    var footerLength = completeJpeg.Length - footerStart;
+
+                    var newJpegLength = headerLength + jpegData.Length + footerLength;
+                    var newJpegData = new byte[newJpegLength];
+
+                    // 复制头部
+                    Array.Copy(completeJpeg, 0, newJpegData, 0, headerLength);
+
+                    // 复制原始扫描数据
+                    Array.Copy(jpegData, 0, newJpegData, headerLength, jpegData.Length);
+
+                    // 复制尾部
+                    Array.Copy(completeJpeg, footerStart, newJpegData, headerLength + jpegData.Length, footerLength);
+
+                    return newJpegData;
+                }
+            }
+
+            // 如果无法智能合并，返回完整的模板 JPEG
+            return completeJpeg;
+        }
+        catch (Exception ex)
+        {
+            return new(ex);
+        }
+    }
+
+    /// <summary>
+    /// 从 JPEG 数据生成 MJPEG 帧数据
+    /// </summary>
+    /// <param name="jpegData">完整的 JPEG 数据</param>
+    /// <param name="boundary">边界字符串（默认为"--boundary"）</param>
+    /// <returns>MJPEG 帧数据</returns>
+    public static Result<(byte[] header, byte[] footer, byte[] data)> CreateMjpegFrameFromJpeg(
+        byte[] jpegData, string boundary = "--boundary")
+    {
+        if (jpegData == null)
+            return new(new ArgumentNullException(nameof(jpegData)));
+
+        // 验证是否为有效的 JPEG 数据
+        if (jpegData.Length < 4 || jpegData[0] != 0xFF || jpegData[1] != 0xD8)
+        {
+            return new(new ArgumentException("Invalid JPEG data: missing JPEG header"));
+        }
+
+        try
+        {
+            var header = CreateMjpegFrameHeader(jpegData.Length, boundary);
+            var footer = CreateMjpegFrameFooter();
+
+            var totalLength = header.Length + jpegData.Length + footer.Length;
+            var frameData = new byte[totalLength];
+
+            var offset = 0;
+            Array.Copy(header, 0, frameData, offset, header.Length);
+            offset += header.Length;
+
+            Array.Copy(jpegData, 0, frameData, offset, jpegData.Length);
+            offset += jpegData.Length;
+
+            Array.Copy(footer, 0, frameData, offset, footer.Length);
+
+            return (header, footer, frameData);
+        }
+        catch (Exception ex)
+        {
+            return new(ex);
+        }
+    }
+
     /// <summary>
     /// 创建完整的 MJPEG 帧数据
     /// </summary>
     /// <param name="jpegData">JPEG数据</param>
     /// <param name="boundary">边界字符串（默认为"--boundary"）</param>
     /// <returns>完整的MJPEG帧数据</returns>
-    public static Result<byte[]> CreateMjpegFrame(byte[] jpegData, string boundary = "--boundary")
+    public static Result<(byte[] header, byte[] footer, byte[] data)> CreateMjpegFrame(
+        byte[] jpegData, string boundary = "--boundary")
     {
         if (jpegData == null)
             return new(new ArgumentNullException(nameof(jpegData)));
@@ -283,7 +439,7 @@ public class Image
 
             Array.Copy(footer, 0, frameData, offset, footer.Length);
 
-            return frameData;
+            return (header, footer, frameData);
         }
         catch (Exception ex)
         {

server/src/Peripherals/JpegClient.cs

@@ -82,6 +82,9 @@ public class Jpeg
     readonly string address;
     private IPEndPoint ep;
 
+    public int Width { get; set; }
+    public int Height { get; set; }
+
     public Jpeg(string address, int port, int taskID, int timeout = 2000)
     {
         if (timeout < 0)
@@ -206,6 +209,9 @@ public class Jpeg
 
         var width = data[0] | (data[1] << 8);
         var height = data[2] | (data[3] << 8);
+        this.Width = width;
+        this.Height = height;
+
         return new((width, height));
     }
 

server/src/Services/HttpHdmiVideoStreamService.cs

@@ -20,6 +20,11 @@ public class HdmiVideoStreamClient
     public required Jpeg JpegClient { get; set; }
 
     public required CancellationTokenSource CTS { get; set; }
+
+    public required int Offset { get; set; }
+
+    public int Width { get; set; }
+    public int Height { get; set; }
 }
 
 public class HttpHdmiVideoStreamService : BackgroundService
@@ -97,14 +102,14 @@ public class HttpHdmiVideoStreamService : BackgroundService
             var client = _clientDict[key];
             client.CTS.Cancel();
 
-            var disableResult = await client.HdmiInClient.EnableTrans(false);
+            var disableResult = await client.JpegClient.SetEnable(false);
-            if (disableResult.IsSuccessful)
+            if (disableResult)
             {
                 logger.Info("Successfully disabled HDMI transmission");
             }
             else
             {
-                logger.Error($"Failed to disable HDMI transmission: {disableResult.Error}");
+                logger.Error($"Failed to disable HDMI transmission");
             }
         }
         catch (Exception ex)
@@ -115,7 +120,12 @@ public class HttpHdmiVideoStreamService : BackgroundService
 
     private async Task<HdmiVideoStreamClient?> GetOrCreateClientAsync(string boardId)
     {
-        if (_clientDict.TryGetValue(boardId, out var client)) return client;
+        if (_clientDict.TryGetValue(boardId, out var client))
+        {
+            client.Width = client.JpegClient.Width;
+            client.Height = client.JpegClient.Height;
+            return client;
+        }
 
         var userManager = new Database.UserManager();
 
@@ -132,19 +142,20 @@ public class HttpHdmiVideoStreamService : BackgroundService
         {
             HdmiInClient = new HdmiIn(board.IpAddr, board.Port, 1),
             JpegClient = new Jpeg(board.IpAddr, board.Port, 1),
-            CTS = new CancellationTokenSource()
+            CTS = new CancellationTokenSource(),
+            Offset = 0
         };
 
         // 启用HDMI传输
         try
         {
-            var hdmiEnableRet = await client.HdmiInClient.EnableTrans(true);
+            // var hdmiEnableRet = await client.JpegClient.EnableTrans(true);
-            if (!hdmiEnableRet.IsSuccessful)
+            // if (!hdmiEnableRet.IsSuccessful)
-            {
+            // {
-                logger.Error($"Failed to enable HDMI transmission for board {boardId}: {hdmiEnableRet.Error}");
+            //     logger.Error($"Failed to enable HDMI transmission for board {boardId}: {hdmiEnableRet.Error}");
-                return null;
+            //     return null;
-            }
+            // }
-            logger.Info($"Successfully enabled HDMI transmission for board {boardId}");
+            // logger.Info($"Successfully enabled HDMI transmission for board {boardId}");
 
             var jpegEnableRet = await client.JpegClient.Init(true);
             if (!jpegEnableRet.IsSuccessful)
@@ -153,6 +164,9 @@ public class HttpHdmiVideoStreamService : BackgroundService
                 return null;
             }
             logger.Info($"Successfully enabled JPEG transmission for board {boardId}");
+
+            client.Width = client.JpegClient.Width;
+            client.Height = client.JpegClient.Height;
         }
         catch (Exception ex)
         {
@@ -209,8 +223,8 @@ public class HttpHdmiVideoStreamService : BackgroundService
             logger.Debug("处理HDMI快照请求");
 
             // 从HDMI读取RGB565数据
-            var frameResult = await client.HdmiInClient.ReadFrame();
+            var frameResult = await client.JpegClient.GetMultiFrames((uint)client.Offset);
-            if (!frameResult.IsSuccessful || frameResult.Value == null)
+            if (!frameResult.IsSuccessful || frameResult.Value == null || frameResult.Value.Count == 0)
             {
                 logger.Error("HDMI快照获取失败");
                 response.StatusCode = 500;
@@ -220,17 +234,27 @@ public class HttpHdmiVideoStreamService : BackgroundService
                 return;
             }
 
-            var jpegData = frameResult.Value;
+            var jpegData = frameResult.Value[0];
+            var jpegImage = Common.Image.CompleteJpegData(jpegData, client.Width, client.Height);
+            if (!jpegImage.IsSuccessful)
+            {
+                logger.Error("JPEG数据补全失败");
+                response.StatusCode = 500;
+                var errorBytes = System.Text.Encoding.UTF8.GetBytes("Failed to complete JPEG data");
+                await response.OutputStream.WriteAsync(errorBytes, 0, errorBytes.Length, cancellationToken);
+                response.Close();
+                return;
+            }
 
             // 设置响应头（参考Camera版本）
             response.ContentType = "image/jpeg";
-            response.ContentLength64 = jpegData.Length;
+            response.ContentLength64 = jpegImage.Value.Length;
             response.Headers.Add("Cache-Control", "no-cache, no-store, must-revalidate");
 
-            await response.OutputStream.WriteAsync(jpegData, 0, jpegData.Length, cancellationToken);
+            await response.OutputStream.WriteAsync(jpegImage.Value, 0, jpegImage.Value.Length, cancellationToken);
             await response.OutputStream.FlushAsync(cancellationToken);
 
-            logger.Debug("已发送HDMI快照图像，大小：{Size} 字节", jpegData.Length);
+            logger.Debug("已发送HDMI快照图像，大小：{Size} 字节", jpegImage.Value.Length);
         }
         catch (Exception ex)
         {
@@ -259,14 +283,36 @@ public class HttpHdmiVideoStreamService : BackgroundService
             int frameCounter = 0;
 
             while (!cancellationToken.IsCancellationRequested)
-            {
-                try
             {
                 var frameStartTime = DateTime.UtcNow;
 
-                    var ret = await client.HdmiInClient.GetMJpegFrame();
+                var frameResult =
-                    if (ret == null) continue;
+                    await client.JpegClient.GetMultiFrames((uint)client.Offset);
-                    var frame = ret.Value;
+                if (!frameResult.IsSuccessful || frameResult.Value == null || frameResult.Value.Count == 0)
+                {
+                    logger.Error("获取HDMI帧失败");
+                    await Task.Delay(100, cancellationToken);
+                    continue;
+                }
+
+                foreach (var framebytes in frameResult.Value)
+                {
+                    var jpegImage = Common.Image.CompleteJpegData(framebytes, client.Width, client.Height);
+                    if (!jpegImage.IsSuccessful)
+                    {
+                        logger.Error("JPEG数据不完整");
+                        await Task.Delay(100, cancellationToken);
+                        continue;
+                    }
+
+                    var frameRet = Common.Image.CreateMjpegFrameFromJpeg(jpegImage.Value);
+                    if (!frameRet.IsSuccessful)
+                    {
+                        logger.Error("创建MJPEG帧失败");
+                        await Task.Delay(100, cancellationToken);
+                        continue;
+                    }
+                    var frame = frameRet.Value;
 
                     await response.OutputStream.WriteAsync(frame.header, 0, frame.header.Length, cancellationToken);
                     await response.OutputStream.WriteAsync(frame.data, 0, frame.data.Length, cancellationToken);
@@ -283,10 +329,7 @@ public class HttpHdmiVideoStreamService : BackgroundService
                         logger.Debug("HDMI帧 {FrameNumber} 性能统计 - 总计: {TotalTime:F1}ms, JPEG大小: {JpegSize} 字节",
                             frameCounter, totalTime, frame.data.Length);
                     }
-                }
+
-                catch (Exception ex)
-                {
-                    logger.Error(ex, "处理HDMI帧时发生错误");
                 }
             }
         }