[Bug 791617] New: waylandsink: fix dmabuf import for zwp_linux_dmabuf_v1 interface version 3

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=791617

            Bug ID: 791617
           Summary: waylandsink: fix dmabuf import for zwp_linux_dmabuf_v1
                    interface version 3
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: p.zabel at pengutronix.de
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 365545
  --> https://bugzilla.gnome.org/attachment.cgi?id=365545&action=edit
wldisplay: update to zwp_linux_dmabuf_v1 interface version 3

Weston 3.0 implements the zwp_linux_dmabuf_v1 interface version 3, which sends
"modifier" events. As far as I am aware, "format" events, which are likely to
become deprecated, have never been sent.
Therefore waylandsink currently always probes an empty format list for
video/x-raw(memory:DMABuf). This can be fixed by updating the the
zwp_linux_dmabuf_v1 interface to version 3.

As long as DRM modifiers can't be negotiated through caps, all formats that are
reported with non-linear modifiers can be dropped.

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