Le vendredi 28 juillet 2023 à 16:22 +0900, Tomasz Figa a écrit : > > For MPLANE, where backward compatibility was built into libv4l2 LD_PRELOAD > > wrapper, > > Could you refresh my memory on what kind of backwards compatibility we > had in libv4l2? Was that to make it possible to use new MPLANE-only > drivers with old applications? https://git.linuxtv.org/v4l-utils.git/tree/lib/libv4l-mplane It does some "magic" trick due to some of the new fields not guarantied to be zero, translate the type, the capabilities. Strangely it does not filter the pixel formats. I suspect it assumes legacy application won't know about the new one and will just ignore/not use them. Nicolas
