query_formats() returning EAGAIN is not considered a progress
in the format negotiation.
If the filter returns EAGAIN but did set some of its formats
lists, it could be considered a partial success and counted
as progress in the negotiation. Not counting it is not a
problem because it currently only happens in the first round,
where there will always be some progress on the other filters.
ret = ff_default_query_formats(f);
if (ret < 0 && ret != AVERROR(EAGAIN))
return ret;
- count_queried++;
+ /* note: EAGAIN could indicate a partial success, not counted yet */
+ count_queried += ret >= 0;
}
/* go through and merge as many format lists as possible */