[Bug 709747] New: [wayland_egl] Add support for GstVideoOverlay

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=709747
  GStreamer | gst-plugins-gl | git

           Summary: [wayland_egl] Add support for GstVideoOverlay
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-gl
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: julien.isorce at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=256826)
 View: https://bugzilla.gnome.org/attachment.cgi?id=256826
 Review: https://bugzilla.gnome.org/review?bug=709747&attachment=256826

use subsurface to implement GstVideoOverlay interface

Hi, here is a kind of proposal to have GstVideoOverlay enable with wayland in
gst-gl.

A surface and its future parent have to use the same wl_display
instance so a generic 'platform-display' property has been added to
glimagesink for this purpose. (Because unfortunately there is no function
"wl_surface_get_display" or "wl_proxy_get_display")

The wl_surface parent is set through gst_video_overlay_set_window_handle.

Note that the child surface has its own wl_event_queue which is different than
the parent's event queue.

Finally port the gtkvideooverlay example to gtk3 and now it shows how to use
GstVideoOverlay interface with wayland.

I have only tested it on Raspberry Pi.

Don't hesitate to put a comment!

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