[FFmpeg-cvslog] av1_metadata: Error out if fragment is empty

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Thu Jun 20 01:45:00 2019 +0200| [3f81cc8c94586ccd500827b606c1eabfb6e2dadb] | committer: Mark Thompson

av1_metadata: Error out if fragment is empty

If the fragment is empty after parsing (i.e. it contains no OBUs), then
the check for the type of the fragment's first OBU is nonsensical; so
error out in this case just as h264_metadata and hevc_metadata do.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3f81cc8c94586ccd500827b606c1eabfb6e2dadb
---

 libavcodec/av1_metadata_bsf.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/av1_metadata_bsf.c b/libavcodec/av1_metadata_bsf.c
index 842b80c201..bb2ca2075b 100644
--- a/libavcodec/av1_metadata_bsf.c
+++ b/libavcodec/av1_metadata_bsf.c
@@ -133,6 +133,12 @@ static int av1_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
         goto fail;
     }
 
+    if (frag->nb_units == 0) {
+        av_log(bsf, AV_LOG_ERROR, "No OBU in packet.\n");
+        err = AVERROR_INVALIDDATA;
+        goto fail;
+    }
+
     for (i = 0; i < frag->nb_units; i++) {
         if (frag->units[i].type == AV1_OBU_SEQUENCE_HEADER) {
             obu = frag->units[i].content;