From fe57904a71fde486237595c47ba8fee072c4aa5c Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 1 May 2022 14:13:29 +0200
Subject: [PATCH] avfilter/af_afftdn: request new frames only when needed

---
 libavfilter/af_afftdn.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavfilter/af_afftdn.c b/libavfilter/af_afftdn.c
index 1b6487a102..cdb256fa10 100644
--- a/libavfilter/af_afftdn.c
+++ b/libavfilter/af_afftdn.c
@@ -1154,6 +1154,11 @@ static int activate(AVFilterContext *ctx)
     if (ret > 0)
         return output_frame(inlink, in);
 
+    if (ff_inlink_queued_samples(inlink) >= s->sample_advance) {
+        ff_filter_set_ready(ctx, 10);
+        return 0;
+    }
+
     FF_FILTER_FORWARD_STATUS(inlink, outlink);
     FF_FILTER_FORWARD_WANTED(outlink, inlink);