8fc2af44c8
The algorithm for generating the current slot index is a simple round robin, nonetheless it's not assured that the next slot index it's not still used by a still living encode picture. This new way holds an array with the still living encode pictures and the next slot index looks for a released index in the array. Its downside is deallocating a picture need to be removed from the array, so the helper has to be passed to the uninit() function Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8007>