[gstreamer-bugs] [Bug 560302] New: Add GST_TAG_MERGE_REMOVE

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: HEAD CVS
           Summary: Add GST_TAG_MERGE_REMOVE
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: ensonic at sonicpulse.de
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


The usecase is that one wants to implement a e.g. privacy filter and strip
certain tags. A pipeline would be something like
filesrc ! demuxer ! queue ! muxer ! filesink
Right now one would need to listen to GST_MESSAGE_TAG, filter the list manually
and then call
gst_tag_setter_merge_tags(setter, filteed_tags,GST_TAG_MERGE_REPLACE_ALL);

I propose adding GST_TAG_MERGE_REMOVE with the following semantics:
merge mode      A + B   A + !B  !A + B  !A + !B
REPLACE         -       A       -       -

This way one can do:
gst_tag_setter_add_tags (setter, GST_TAG_MERGE_REMOVE,
     GST_TAG_TITLE,NULL,
     GST_TAG_DURATION, GST_CLOCK_TIME_NONE,
     NULL);
Basically the values don't matter.


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