[Bug 739765] caps: Add gst_caps_foreach() and gst_caps_map_in_place()

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=739765
  GStreamer | gstreamer (core) | unspecified

--- Comment #5 from Sebastian Dröge (slomo) <slomo at coaxion.net> 2014-12-16 08:57:10 UTC ---
Rather with "and" as you can do both at the same time on the same
caps/structure:
- gst_caps_filter_and_map_in_place()
- gst_structure_filter_and_map_in_place()


Adding non-inplace variants for all this doesn't seem too important as foreach
already allows that by putting an empty caps/structure into the user_data and
filling that during iteration.

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