From 16557887127256fb1e491702375e7ea7b3940924 Mon Sep 17 00:00:00 2001
From: Nicolas George <george@nsup.org>
Date: Wed, 30 Sep 2015 16:11:57 +0200
Subject: lavfi: make request_frame() non-recursive.

Instead of calling the input filter request_frame() method,
ff_request_frame() now marks the link and returns immediately.
buffersink is changed to activate the marked filters until
a frame is obtained.
---
 libavfilter/buffersink.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'libavfilter/buffersink.c')

diff --git a/libavfilter/buffersink.c b/libavfilter/buffersink.c
index 7a19df2c3a..2feb56dee9 100644
--- a/libavfilter/buffersink.c
+++ b/libavfilter/buffersink.c
@@ -140,6 +140,11 @@ int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFr
             return AVERROR(EAGAIN);
         if ((ret = ff_request_frame(inlink)) < 0)
             return ret;
+        while (inlink->frame_wanted_out) {
+            ret = ff_filter_graph_run_once(ctx->graph);
+            if (ret < 0)
+                return ret;
+        }
     }
 
     if (flags & AV_BUFFERSINK_FLAG_PEEK) {
-- 
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