[Bug 736133] New: v4l2: query crop configuration after each call of S_CROP

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=736133
  GStreamer | gst-plugins-good | git

           Summary: v4l2: query crop configuration after each call of
                    S_CROP
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: aurelien.zanelli at parrot.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


S_CROP ioctl is write-only and the device can adjust crop rectangle so we have
to query crop configuration after each call of S_CROP to know if it has been
adjusted or not. I will attach a simple patch for that.

A more serious thing is that, according to specification, a driver could also
change the configured format on a S_CROP so we may have to do something in this
case if some drivers do this.

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