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| author | Nicolas George <nicolas.george@normalesup.org> | 2013-03-31 19:17:57 +0200 |
|---|---|---|
| committer | Nicolas George <nicolas.george@normalesup.org> | 2013-04-03 17:33:27 +0200 |
| commit | 79d8cfacf07863500d4fedec669c49e2552c3876 (patch) | |
| tree | de362386cfaf64843de4de9308e695c2f53a9ccc /libavfilter/internal.h | |
| parent | c208576cef0a97903bbeac4f580fa436605a5c3e (diff) | |
| download | ffmpeg-79d8cfacf07863500d4fedec669c49e2552c3876.tar.gz | |
lavfi: loop on request_frame if necessary.
Some filters need several input frames before producing output.
For these filter, it becomes simpler to return 0 in
request_frame() and let the framework call it again until
output has been produced.
Diffstat (limited to 'libavfilter/internal.h')
| -rw-r--r-- | libavfilter/internal.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libavfilter/internal.h b/libavfilter/internal.h index 9a42ae08df..0b28422f1f 100644 --- a/libavfilter/internal.h +++ b/libavfilter/internal.h @@ -325,4 +325,18 @@ int ff_buffersink_read_samples_compat(AVFilterContext *ctx, AVFilterBufferRef ** */ int ff_filter_frame(AVFilterLink *link, AVFrame *frame); +/** + * Flags for AVFilterLink.flags. + */ +enum { + + /** + * Frame requests may need to loop in order to be fulfilled. + * A filter must set this flags on an output link if it may return 0 in + * request_frame() without filtering a frame. + */ + FF_LINK_FLAG_REQUEST_LOOP = 1, + +}; + #endif /* AVFILTER_INTERNAL_H */ |