From 87158bd6cdb05dc316e7e9eec01fd2fc93a64836 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Brzezi=C5=84ski?= <piotr@centricular.com>
Date: Thu, 9 Feb 2023 18:51:30 +0100
Subject: [PATCH] vtdec: Fix not waiting for async frames when flushing

This was causing incorrect output when seeking, especially
when used with a multithreaded source like `videotestsrc n-threads=2`.
It should now correctly wait for frames still being processed by VT
while vtdec is flushing.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3939>
---
 subprojects/gst-plugins-bad/sys/applemedia/vtdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/subprojects/gst-plugins-bad/sys/applemedia/vtdec.c b/subprojects/gst-plugins-bad/sys/applemedia/vtdec.c
index b96c88243a..dce469346a 100644
--- a/subprojects/gst-plugins-bad/sys/applemedia/vtdec.c
+++ b/subprojects/gst-plugins-bad/sys/applemedia/vtdec.c
@@ -1020,7 +1020,7 @@ gst_vtdec_push_frames_if_needed (GstVtdec * vtdec, gboolean drain,
     }
   }
 
-  if (drain)
+  if (drain || flush)
     VTDecompressionSessionWaitForAsynchronousFrames (vtdec->session);
 
   /* push a buffer if there are enough frames to guarantee that we push in PTS