This removes a dependency of checkasm on lavfi/vf_eq.o
and also allows to inline ff_eq_init() irrespectively of
interposing.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
In particular, add support for t, pos, n, r parameters, and add an eval
mode option.
Also, partially reword option documentation.
With several major edit by Stefano Sabatini.
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
