The issue here is that upstream nodes get their request counters increased
while sink hasn't requested any. This causes desync between sink request
counters and upstream node counters, potentially causing sample drops and
sink waiting forever for samples that will never come. Case like that
is easy to reproduce with mfplay-based player, where occasionally
end-of-presentation condition does not trigger, but new samples are coming in.
Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>