[Bug 755665] New: Add support for rolling headers and clock update in the teletext decoder

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=755665

            Bug ID: 755665
           Summary: Add support for rolling headers and clock update in
                    the teletext decoder
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: dkk089 at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 312204
  --> https://bugzilla.gnome.org/attachment.cgi?id=312204&action=edit
Add support for rolling headers and clock updates in teletextdec

This patch adds support for rolling headers and clock updates in the teletext
decoder's RGBA output mode. Thus, the behaviour is now quite similar to what
can be seen with analogue TVs :

 * Right after turning on the decoder, only the rolling header is displayed,
while the page content is blank.
 * After finding the page, only the clock is updated.
 * When changing the requested page, the content of the old page is still
displayed, but the header shows rolling page numbers.

The patch requires applying the patch porting the teletextdec element to 1.0,
which I posted previously.

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