WIP: DMA improvement
Improve the DMA to a generic usage, such as
gst-launch-1.0 -v filesrc location=264.bits ! h264parse ! vaapih264dec ! video/x-raw(memory:DMABuf) ! vaapipostproc ! video/x-raw(memory:DMABuf) ! vaapih265enc ! filesink location=1.265
Also use the new API of vaExportSurfaceHandle() to replace the old manner.
Edited by He Junyan