gl: Enable the modifier support in glupload plugin.
We already meet more and more HW which the traditional DMA manner can not work. The driver(VA, 3D, etc) requires a modifier and even other meta data to work correctly.
We should make
gst-launch-1.0 -vf filesrc location=test.mp4 ! qtdemux name=de de.video_0 ! h265parse ! vah265dec ! "video/x-raw(memory:DMABuf)" ! vapostproc ! "video/x-raw(memory:DMABuf),width=1280,height=720,pixel-aspect-ratio=(fraction)1/1" ! glimagesink
work together with !4044 (merged).
Edited by He Junyan