[FFmpeg-cvslog] avformat/vpk: check that samples_per_block is > 0

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Wed Feb 24 17:03:11 2021 +0100| [8213f0a7f7e64c81a275118ac00decbaa96e040a] | committer: Paul B Mahol

avformat/vpk: check that samples_per_block is > 0

Fixes floating point exception.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8213f0a7f7e64c81a275118ac00decbaa96e040a
---

 libavformat/vpk.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavformat/vpk.c b/libavformat/vpk.c
index b1df4e0dfd..f7f20548dc 100644
--- a/libavformat/vpk.c
+++ b/libavformat/vpk.c
@@ -121,7 +121,10 @@ static int vpk_read_seek(AVFormatContext *s, int stream_index,
     int64_t ret = 0;
 
     samples_per_block = av_get_audio_frame_duration2(par, par->block_align);
-    timestamp /= samples_per_block;
+    if (samples_per_block > 0)
+        timestamp /= samples_per_block;
+    else
+        return -1;
     ret = avio_seek(s->pb, vpk->data_start + timestamp * par->block_align, SEEK_SET);
     if (ret < 0)
         return ret;