This sets an opaque, named pointer on a miniobject.
The name is specified through a #GQuark (retrieved e.g. via
g_quark_from_static_string()), and the pointer
can be gotten back from the @object with gst_mini_object_get_qdata()
until the @object is disposed.
Setting a previously set user data pointer, overrides (frees)
the old pointer set, using %NULL as pointer essentially
removes the data stored.
@destroy may be specified which is called with @data as argument
when the @object is disposed, or the data is being overwritten by
a call to gst_mini_object_set_qdata() with the same @quark.
This sets an opaque, named pointer on a miniobject. The name is specified through a #GQuark (retrieved e.g. via g_quark_from_static_string()), and the pointer can be gotten back from the @object with gst_mini_object_get_qdata() until the @object is disposed. Setting a previously set user data pointer, overrides (frees) the old pointer set, using %NULL as pointer essentially removes the data stored.
@destroy may be specified which is called with @data as argument when the @object is disposed, or the data is being overwritten by a call to gst_mini_object_set_qdata() with the same @quark.