From e5b1f2b02749c7fb02a26b65adb72fd9fdf630be Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Thu, 26 Jul 2018 22:26:01 -0300
Subject: [PATCH] avcodec/mpeg4_unpack_bframes_bsf: implement a
 AVBSFContext.flush() callback

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavcodec/mpeg4_unpack_bframes_bsf.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavcodec/mpeg4_unpack_bframes_bsf.c b/libavcodec/mpeg4_unpack_bframes_bsf.c
index c2b779a9d5..e9c535f390 100644
--- a/libavcodec/mpeg4_unpack_bframes_bsf.c
+++ b/libavcodec/mpeg4_unpack_bframes_bsf.c
@@ -166,6 +166,12 @@ static int mpeg4_unpack_bframes_init(AVBSFContext *ctx)
     return 0;
 }
 
+static void mpeg4_unpack_bframes_flush(AVBSFContext *bsfc)
+{
+    UnpackBFramesBSFContext *ctx = bsfc->priv_data;
+    av_packet_unref(ctx->b_frame);
+}
+
 static void mpeg4_unpack_bframes_close(AVBSFContext *bsfc)
 {
     UnpackBFramesBSFContext *ctx = bsfc->priv_data;
@@ -181,6 +187,7 @@ const AVBitStreamFilter ff_mpeg4_unpack_bframes_bsf = {
     .priv_data_size = sizeof(UnpackBFramesBSFContext),
     .init           = mpeg4_unpack_bframes_init,
     .filter         = mpeg4_unpack_bframes_filter,
+    .flush          = mpeg4_unpack_bframes_flush,
     .close          = mpeg4_unpack_bframes_close,
     .codec_ids      = codec_ids,
 };