d3d11: implement the Check method to verify if D3D11 is available

2 files changed, 10 insertions, 1 deletions

diff --git a/decoder/LAVVideo/decoders/d3d11va.cpp b/decoder/LAVVideo/decoders/d3d11va.cpp
index 31565d20..0946c2fd 100644
--- a/decoder/LAVVideo/decoders/d3d11va.cpp
+++ b/decoder/LAVVideo/decoders/d3d11va.cpp
@@ -90,6 +90,7 @@ STDMETHODIMP CDecD3D11::DestroyDecoder(bool bFull, bool bNoAVCodec)
   return S_OK;
 }
 
+// ILAVDecoder
 STDMETHODIMP CDecD3D11::Init()
 {
   dx.d3d11lib = LoadLibrary(L"d3d11.dll");
@@ -123,7 +124,14 @@ STDMETHODIMP CDecD3D11::Init()
   return S_OK;
 }
 
-// ILAVDecoder
+STDMETHODIMP CDecD3D11::Check()
+{
+  // attempt creating a hardware device with video support
+  // by passing nullptr to the device parameter, no actual device will be created and only support will be checked
+  HRESULT hr = dx.mD3D11CreateDevice(nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, D3D11_CREATE_DEVICE_VIDEO_SUPPORT, nullptr, 0, D3D11_SDK_VERSION, nullptr, nullptr, nullptr);
+  return hr;
+}
+
 STDMETHODIMP CDecD3D11::InitAllocator(IMemAllocator **ppAlloc)
 {
   HRESULT hr = S_OK;
diff --git a/decoder/LAVVideo/decoders/d3d11va.h b/decoder/LAVVideo/decoders/d3d11va.h
index 965de0ec..b20570fb 100644
--- a/decoder/LAVVideo/decoders/d3d11va.h
+++ b/decoder/LAVVideo/decoders/d3d11va.h
@@ -43,6 +43,7 @@ public:
   virtual ~CDecD3D11(void);
 
   // ILAVDecoder
+  STDMETHODIMP Check();
   STDMETHODIMP InitDecoder(AVCodecID codec, const CMediaType *pmt);
   STDMETHODIMP GetPixelFormat(LAVPixelFormat *pPix, int *pBpp);
   STDMETHODIMP Flush();