From 42271f8e182a85ac1d6706e0461b37895fd6c1f0 Mon Sep 17 00:00:00 2001
From: Nicolas Gaullier <nicolas.gaullier@cji.paris>
Date: Thu, 5 Mar 2020 09:17:23 +0100
Subject: [PATCH] avcodec/utils: Fix ff_add_cpb_side_data() add twice

Makes it behave similarly to av_stream_add_side_data().

Signed-off-by: Anton Khirnov <anton@khirnov.net>
---
 libavcodec/utils.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 66bfdaf4f8..4ab8cff4f5 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1981,6 +1981,11 @@ AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx)
     AVPacketSideData *tmp;
     AVCPBProperties  *props;
     size_t size;
+    int i;
+
+    for (i = 0; i < avctx->nb_coded_side_data; i++)
+        if (avctx->coded_side_data[i].type == AV_PKT_DATA_CPB_PROPERTIES)
+            return (AVCPBProperties *)avctx->coded_side_data[i].data;
 
     props = av_cpb_properties_alloc(&size);
     if (!props)