C<encoding> is assumed to be an C<Encode> object, the PV of C<ssv> is
assumed to be octets in that encoding and decoding the input starts
from the position which S<C<(PV + *offset)>> pointed to. C<dsv> will be
C<encoding> is assumed to be an C<Encode> object, the PV of C<ssv> is
assumed to be octets in that encoding and decoding the input starts
from the position which S<C<(PV + *offset)>> pointed to. C<dsv> will be