Fix NV12 crash issue when recreate camera object

(new structure) does not work

modules/ANSFR/CMakeLists.txt

@@ -5,6 +5,7 @@ set(ANSFR_SOURCES
     ANSFRCommon.cpp
     ANSFaceRecognizer.cpp
     ANSGpuFrameRegistry.cpp
+    GpuNV12SlotPool.cpp
     FaceDatabase.cpp
     FaceNet.cpp
     dllmain.cpp

modules/ANSFR/GpuNV12SlotPool.cpp

@@ -0,0 +1,23 @@
+// GpuNV12SlotPool.cpp — Cross-DLL singleton resolver for ANSODEngine.dll.
+//
+// Finds the canonical GpuNV12SlotPool instance exported by ANSCV.dll
+// via GetProcAddress.  No link dependency on ANSCV.lib needed.
+
+#define WIN32_LEAN_AND_MEAN
+#define NOMINMAX
+#include <windows.h>
+#include "GpuNV12SlotPool.h"
+
+GpuNV12SlotPool* GpuNV12SlotPool::resolveProcessWide() {
+    // ANSCV.dll is always loaded before inference starts (it provides RTSP).
+    HMODULE hMod = GetModuleHandleA("ANSCV.dll");
+    if (hMod) {
+        typedef GpuNV12SlotPool* (*GetInstanceFn)();
+        auto fn = reinterpret_cast<GetInstanceFn>(
+            GetProcAddress(hMod, "GpuNV12SlotPool_GetInstance"));
+        if (fn) return fn();
+    }
+    // Fallback: local instance (unit tests without ANSCV.dll).
+    static GpuNV12SlotPool local;
+    return &local;
+}