lavfi: drop the requirement that request_frame returns a frame.

It requires a loop in filters or the framework,
that makes the scheduling less efficient and more complex.
This is purely an internal change since the loop is now
present in buffersink.
Note that no filter except buffersink did rely on the requirement.

1 files changed, 0 insertions, 6 deletions

diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 642aa834ab..5d4cd6ce12 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -500,12 +500,6 @@ struct AVFilterLink {
     int channels;
 
     /**
-     * True if a frame is being requested on the link.
-     * Used internally by the framework.
-     */
-    unsigned frame_requested;
-
-    /**
      * Link processing flags.
      */
     unsigned flags;