avfilter/af_aresample: Use preinit instead of init_dict

By using preinit, the SwrContext already exists directly after
allocating the filter, so that the filter's AVClass's child_next
becomes usable for setting options with the AV_OPT_SEARCH_CHILDREN
search flag. This means that it is no longer necessary to use
the init_dict callback for this filter.

Furthermore, the earlier code did not abide by the documentation
of the init_dict callback at all: Instead of only returning the
options that have not been recognized it always returned all options
on any av_opt_set() error and errored out in this case; yet if
the error was just caused by an unrecognized option, it should not
error out at all and instead return said option.

This behaviour has been inherited by avfilter_init_dict(),
contradicting its documentation. This is also fixed by this commit.

Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

0 files changed, 0 insertions, 0 deletions