[Bug 760267] tracer: how to pass and structure tracing data (GstStructure, GVariant, etc.)

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=760267

--- Comment #18 from Stefan Sauer (gstreamer, gtkdoc dev) <ensonic at sonicpulse.de> ---
Meh, absolute show-stopper :/

When serializing a structure, the fields are serialized using
gst_value_serialize() and this escaped substrings using gst_string_wrap(). It I
build the format string and rely on GST_PTR_FORMAT for e.g. nested structures,
this is not the case :/

We log the structures contained in messages/queries.

My first thought was to fixup the string from the tracer (call
gst_structure_to_string() there), but that won't work - we would need to make
the escaping code public and the gtype would then be string and not structure
:/

Maybe I can iterate the var_vars in the log handler and handle this there. Any
better ideas? That comes from optimizing code that works :/

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