Originally DMABufs were imported into a temporary buffer followed by a
copy operation into the desktop frame itself. This is not needed as we
can import them directly into desktop frames and avoid this overhead.
Also drop support for MemPtr buffers as both Mutter and KWin don't seem
to support them and they are going to be too slow anyway.
Testing with latest Chromium, I could see two processes with usage around 20% and 40% without this change going down to 10% and 20% with
this change applied.
Bug: webrtc:13429
Bug: chrome:1378258
Change-Id: Ice3292528ff56300931c8638f8e03d4883d5e331
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/297501
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Commit-Queue: Jan Grulich <grulja@gmail.com>
Cr-Commit-Position: refs/heads/main@{#39594}
d9faa73cbb