- Remove pre-CUDA-memory allocation for all input types (CUDA, GL, and SYSTEM)
- Register input CUDA memory directly to encoding session if possible. Otherwise (if input type is not CUDA), input memory will be copied into internal CUDA memory using newly added gst_cuda_buffer_copy() method and then internal CUDA memory is registered to encoding session
- D3D11 is not supported yet.
Depends on !1945 (merged)