* the min or max values set by the control point, but is more 'curvy'
* @GST_INTERPOLATION_MODE_CUBIC_MONOTONIC: monotonic cubic interpolation, will not
* produce any values outside of the min-max range set by the control points
* the min or max values set by the control point, but is more 'curvy'
* @GST_INTERPOLATION_MODE_CUBIC_MONOTONIC: monotonic cubic interpolation, will not
* produce any values outside of the min-max range set by the control points