From f4b84d89d1cf17835a1ed2d2b8a0cfa08b810fe9 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Thu, 10 Sep 2020 17:23:41 +0200
Subject: [PATCH] avformat/brstm: clip timestamp when seeking into acceptable
 range

---
 libavformat/brstm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavformat/brstm.c b/libavformat/brstm.c
index ca965ed7e1..a63c7ee5ab 100644
--- a/libavformat/brstm.c
+++ b/libavformat/brstm.c
@@ -446,7 +446,11 @@ static int read_seek(AVFormatContext *s, int stream_index,
     BRSTMDemuxContext *b = s->priv_data;
     int64_t ret = 0;
 
+    if (timestamp < 0)
+        timestamp = 0;
     timestamp /= b->samples_per_block;
+    if (timestamp >= b->block_count)
+        timestamp = b->block_count - 1;
     ret = avio_seek(s->pb, b->data_start + timestamp * b->block_size *
                            st->codecpar->channels, SEEK_SET);
     if (ret < 0)