[vlc-commits] d3d11va: make the OS detection not dependent on the app manifest

[Steve Lhomme]

vlc | branch: master | Steve Lhomme <robux4 at ycbcr.xyz> | Tue Aug  7 14:18:04 2018 +0200| [c54494b4551bc5d421ab0d33814b6aa65b6ab4bb] | committer: Steve Lhomme

d3d11va: make the OS detection not dependent on the app manifest

hopefully the location won't change in future Windows versions

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=c54494b4551bc5d421ab0d33814b6aa65b6ab4bb
---

 modules/codec/avcodec/d3d11va.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/modules/codec/avcodec/d3d11va.c b/modules/codec/avcodec/d3d11va.c
index 6e5fc20f44..9e3a7106ee 100644
--- a/modules/codec/avcodec/d3d11va.c
+++ b/modules/codec/avcodec/d3d11va.c
@@ -321,9 +321,18 @@ static int Open(vlc_va_t *va, AVCodecContext *ctx, enum PixelFormat pix_fmt,
     if (pix_fmt != AV_PIX_FMT_D3D11VA_VLD)
         return VLC_EGENERIC;
 
+#if !VLC_WINSTORE_APP
     /* Allow using D3D11VA automatically starting from Windows 8.1 */
-    if (!va->obj.force && !IsWindows8Point1OrGreater())
-        return VLC_EGENERIC;
+    if (!va->obj.force)
+    {
+        bool isWin81OrGreater = false;
+        HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll"));
+        if (likely(hKernel32 != NULL))
+            isWin81OrGreater = GetProcAddress(hKernel32, "IsProcessCritical") != NULL;
+        if (!isWin81OrGreater)
+            return VLC_EGENERIC;
+    }
+#endif
 
     vlc_va_sys_t *sys = calloc(1, sizeof (*sys));
     if (unlikely(sys == NULL))