Mainly depth is included in Y_ and CBCR_LIMIT - the used denominator
255.0 matched only 8 bits.
Add (substract) epsilon 0.5 when converting the to integer to round the
value correctly.
The management of should_exit events should be also be shared with the
transcoding reflector that uses some parts that may depend upon this
functionality.
This is not purely a refactorization but slightly changes behavior,
namely the shared state cleanup is done in a destructor, not by
`uv.stop()` as it used to be.
see GH-307
With standard log level, the tests produce unnecessary warnings intended
mainly to main user, not a developer. So silence this by default to be
nicer (but allow '-V' option).
return int -1 if test failed; 0 if succeeded; 1 if not applicable (but
not failed)
As the old and new tests are mostly compatible now, do not take
different approach handling both groups.
