新增 Mjpegplayer 用来播放 Web 流

SHH.CameraSdk/Drivers/DaHua/DahuaVideoSource.cs

@@ -3,6 +3,7 @@ using OpenCvSharp;
 using Serilog;
 using System.Runtime.ExceptionServices;
 using System.Security;
+using static SHH.CameraSdk.DahuaPlaySDK;
 
 namespace SHH.CameraSdk;
 
@@ -173,8 +174,35 @@ public class DahuaVideoSource : BaseVideoSource
                     {
                         _playPort = port;
                         DahuaPlaySDK.PLAY_SetStreamOpenMode(_playPort, 0);
+
+                        // 打开流
                         DahuaPlaySDK.PLAY_OpenStream(_playPort, IntPtr.Zero, 0, 1024 * 1024 * 2);
 
+                        // =================================================================================
+                        // 🚀 [新增代码] 性能优化：尝试开启大华 GPU 硬解码
+                        // 位置：必须在 PLAY_OpenStream 之后，PLAY_Play 之前
+                        // =================================================================================
+                        try
+                        {
+                            // nDecodeEngine: 1 = 开启硬解码 (Nvidia/Intel)
+                            // 注意：大华 SDK 若不支持会自动降级，try-catch 仅为了防止 P/Invoke 签名缺失崩溃
+                            // Optimized: 使用新版接口开启硬件解码，优先尝试 CUDA 以保证 Ayay 的多路并发性能
+                            // nPort 是通过 PLAY_GetFreePort 获取的播放通道号
+                            bool success = PLAY_SetEngine(_playPort, DecodeType.DECODE_HW_NV_CUDA, RenderType.RENDER_D3D11);
+
+                            if (!success)
+                            {
+                                // 如果显卡不支持 CUDA，降级为普通硬解或软解
+                                PLAY_SetEngine(_playPort, DecodeType.DECODE_HW, RenderType.RENDER_D3D9);
+                            }
+                            _sdkLog.Information($"[Perf] Dahua 尝试开启硬解码. ID:{_config.Id} Port:{_playPort}");
+                        }
+                        catch (Exception ex)
+                        {
+                            _sdkLog.Warning($"[Perf] Dahua 开启硬解码失败: {ex.Message}");
+                        }
+
+                        // 设置回调与播放
                         _decCallBack = new DahuaPlaySDK.DECCBFUN(SafeOnDecodingCallBack);
                         DahuaPlaySDK.PLAY_SetDecCallBack(_playPort, _decCallBack);
                         DahuaPlaySDK.PLAY_Play(_playPort, IntPtr.Zero);