[Bug 754678] controller: the cubic interpolation we have implemented can overshoot min/max of the control-point values

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=754678

--- Comment #9 from Stefan Sauer (gstreamer, gtkdoc dev) <ensonic at sonicpulse.de> ---
Meh #2, this struct needs padding. If we need to preserve compat for  now, I'll
have to revert the changes and wait for 2.0.

The only solution that keeps the ABI I can think of would be to use a gpointer
in the union (smaller than two doubles) and then in the
GstInterpolationControlSource keep a GHashTable<gpointer,
struct-with-3-doubles>. The struct-with-3-doubles would be allocates on the
fly. The hashtables would be nuked on finalize.

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