avfilter_register   31 libavfilter/allfilters.c             avfilter_register(&ff_##y##_##x);                           \
avfilter_register   37 libavfilter/allfilters.c         avfilter_register(&ff_##x);                                     \
avfilter_register  991 libavfilter/avfilter.h int avfilter_register(AVFilter *filter);