Changes:
1) Scoped class
This is a special class for GLib based objects which we need to manually
delete with different functions. Wrapping these objects into Scoped class
will destroy them automatically when they go out of scope.
2) Window sharing support
Unlike screen sharing, with window sharing we are required to obtain more
information from the PipeWire stream, like video crop metadata, which we
use to properly set size of our buffer.
3) Support for DmaBuf and MemFd buffer types
As of now, we expected the PipeWire stream will provide only plain data
which we just need to copy to our buffer. We now add support for new
buffer types, which are often preferred for better effeciency.
4) Minor bugfixes:
a) Additionally accept PipeWire streams using alpha channels (BGRA, RGBA)
b) Add lock over PipeWire loop to prevent potential issues until we fully
intialize everything we need
c) When obtaining buffers, make sure we work with the latest one
Bug: chromium:682122
Change-Id: I64638d5dcbe18e7280550dca0b01b17c511ac98a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/194100
Commit-Queue: Jamie Walch <jamiewalch@chromium.org>
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#32763}
40c3ea5c71