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| author | Nicolas George <george@nsup.org> | 2022-02-19 16:13:39 +0100 |
|---|---|---|
| committer | Nicolas George <george@nsup.org> | 2022-02-20 12:38:52 +0100 |
| commit | 531d09fb2d6bddb968dbef1fbb8b351aed85cbfa (patch) | |
| tree | 97c39854f9436c81ea773b151c457fa0a5ab332a /libavfilter | |
| parent | 12139d11036e3e5db87c4ab5a2b064fed7394bbb (diff) | |
| download | ffmpeg-531d09fb2d6bddb968dbef1fbb8b351aed85cbfa.tar.gz | |
lavfi: add ff_inoutlink_check_flow()
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/avfilter.c | 8 | ||||
| -rw-r--r-- | libavfilter/filters.h | 8 |
2 files changed, 16 insertions, 0 deletions
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c index 7362bcdab5..1f37a70179 100644 --- a/libavfilter/avfilter.c +++ b/libavfilter/avfilter.c @@ -1559,6 +1559,14 @@ int ff_outlink_get_status(AVFilterLink *link) return link->status_in; } +int ff_inoutlink_check_flow(AVFilterLink *inlink, AVFilterLink *outlink) +{ + return ff_outlink_frame_wanted(outlink) || + ff_inlink_check_available_frame(inlink) || + inlink->status_out; +} + + const AVClass *avfilter_get_class(void) { return &avfilter_class; diff --git a/libavfilter/filters.h b/libavfilter/filters.h index 1157755403..86bc49d459 100644 --- a/libavfilter/filters.h +++ b/libavfilter/filters.h @@ -258,4 +258,12 @@ static inline void ff_outlink_set_status(AVFilterLink *link, int status, int64_t } \ } while (0) +/** + * Check for flow control between input and output. + * This is necessary for filters that may produce several output frames for + * a single input event, otherwise they may produce them all at once, + * causing excessive memory consumption. + */ +int ff_inoutlink_check_flow(AVFilterLink *inlink, AVFilterLink *outlink); + #endif /* AVFILTER_FILTERS_H */ |