d3d11_fmt: don't create an empty external decoder device
If the external code didn't provide proper devices, we should not create a
decoder device. When we have a VLC_DECODER_DEVICE_D3D11VA
we should assume
it's a valid one.
If the external code didn't provide proper devices, we should not create a
decoder device. When we have a VLC_DECODER_DEVICE_D3D11VA
we should assume
it's a valid one.
VideoLAN code repository instance