[ashlar]

To others, I'll soon delete the github fork that was merged, it did not work as I hopped. 
So I'm changing the strategy to port DSPlayer to Kodi 19. 

Is it perhaps easier to implement mpv or it's library?
https://mpv.io/
https://github.com/haasn/libplacebo 

The idea has been, for a long time, to be able to use madVR, due to it being the most advanced renderer available currently for HTPCs. I'm not sure that having mpv would warrant the effort needed. mpv might probably be a good choice for Kodi, overall, if there was interest in playback engine (as it offers multiplatform support for Windows, Mac, Linux, Android). But I think, at that point, an "easier" solution might be to implement some more advanced resizers in the existing engine.
Let's give fandangos the time he needs to evaluate the different possibilities and approaches.