docs: Update for d3d11, mediafoundation, wasapi and nvcodec plugins
cache file is not meant to be updated here.
This MR is to update doc of some Windows only plugin (+ nvcodec) (directshow/directsound will not be covered by this MR)
Major changes are:
- Make use of
GST_PARAM_CONDITIONALLY_AVAILABLE
for hardware elements - Use
gst_type_mark_as_plugin_api()
for plugin internalGType
Note: there's nothing to update for wasapi2
plugin regarding GST_PARAM_CONDITIONALLY_AVAILABLE
and gst_type_mark_as_plugin_api()
Edited by Seungha Yang