[Bug 748233] New: Add support for a format-specifier to GstObject names for uniqueness

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=748233

            Bug ID: 748233
           Summary: Add support for a format-specifier to GstObject names
                    for uniqueness
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gstreamer (core)
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: nirbheek.chauhan at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 302051
  --> https://bugzilla.gnome.org/attachment.cgi?id=302051&action=edit
gstobject: Add support for a format-specifier suffix

Similar to how the default name for an element is automatically assigned to be
unique, it would be useful to be able to pass a custom name that can be
automatically made unique.

For instance, if I have a program with a complex pipeline with queues in
several different contexts (after decoders, after tees, etc), I want to be able
to specify a context-specific name such as "video-decoder-queue-%u",
"tee-queue-%u", etc which will become "video-decoder-queue-0",
"video-decoder-queue-1", and so on. This makes parsing debug logs much easier
when you see "video-decoder-queue-12" instead of "queue34".

The attached patch implements this.

gst_element_factory_make (queue, "somequeue-%u");

will create "some-queue-0", "some-queue-1", etc using the same infrastructure
as the code that does the default name generation.

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