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Wpf_AiSportsMicrospace/D3DFrameRenderer.cs

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+using System;
+using System.Collections.Generic;
+using System.Drawing.Imaging;
+using System.Drawing;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Interop;
+using System.Windows.Media.Imaging;
+using System.Windows.Media;
+using System.Windows;
+
+namespace Wpf_AiSportsMicrospace
+{
+    public class D3DFrameRenderer
+    {
+        private D3DImage _d3dImage;
+
+        public D3DFrameRenderer(D3DImage d3dImage)
+        {
+            _d3dImage = d3dImage;
+        }
+
+        // 当有新帧时调用
+        public void RenderFrame(byte[] jpegBuffer)
+        {
+            Task.Run(() =>
+            {
+                int width, height;
+                var bgra = ConvertJpegToBGRA32(jpegBuffer, out width, out height);
+
+                // 更新 UI
+                Application.Current.Dispatcher.BeginInvoke(new Action(() =>
+                {
+                    if (!_d3dImage.IsFrontBufferAvailable) return;
+
+                    if (_d3dImage.PixelWidth != width || _d3dImage.PixelHeight != height)
+                    {
+                        _d3dImage.Lock();
+                        _d3dImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero); // 先清空
+                        _d3dImage.Unlock();
+                    }
+
+                    // 用 WriteableBitmap 临时显示
+                    var wb = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgra32, null);
+                    wb.Lock();
+                    Marshal.Copy(bgra, 0, wb.BackBuffer, bgra.Length);
+                    wb.AddDirtyRect(new Int32Rect(0, 0, width, height));
+                    wb.Unlock();
+                    _d3dImage.Lock();
+                    _d3dImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero); // 暂时不绑定真实 D3D Surface
+                    _d3dImage.Unlock();
+
+                    // 临时用 ImageSource 显示
+                    FrameReady?.Invoke(wb, width, height);
+                }));
+            });
+        }
+
+        public delegate void FrameReadyHandler(ImageSource frame, int width, int height);
+        public event FrameReadyHandler FrameReady;
+
+        private byte[] ConvertJpegToBGRA32(byte[] jpegBuffer, out int width, out int height)
+        {
+            using var ms = new MemoryStream(jpegBuffer);
+            using var bmp = new Bitmap(ms);
+
+            width = bmp.Width;
+            height = bmp.Height;
+
+            var rect = new Rectangle(0, 0, width, height);
+            var bmpData = bmp.LockBits(rect, ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
+
+            int bytes = bmpData.Stride * height;
+            byte[] raw = new byte[bytes];
+            Marshal.Copy(bmpData.Scan0, raw, 0, bytes);
+
+            bmp.UnlockBits(bmpData);
+            return raw;
+        }
+    }
+}