Provide function to copy nvdec device memory to vulkan texture
Created by: jojo61
I would like to have the possibility to copy device memory from nvdec to a vulkan texture as Device-to-Device copy. At the moment I need to copy it via cuda_memcpy2d to host memory and then upload it to the vulkan texture. This is not very fast. In mpv this is already done and it would be great if libplacebo could provide this also.