avformat/movenc: assert that get_cluster_duration() value is valid

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · 20fa3fb93d
parent 1b872de8f4
commit 20fa3fb93d
1 changed files with 6 additions and 1 deletions
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@ -614,7 +614,12 @@ static int get_cluster_duration(MOVTrack *track, int cluster_idx)
    else
        next_dts = track->cluster[cluster_idx + 1].dts;

-    return next_dts - track->cluster[cluster_idx].dts;
+    next_dts -= track->cluster[cluster_idx].dts;
+
+    av_assert0(next_dts >= 0);
+    av_assert0(next_dts <= INT_MAX);
+
+    return next_dts;
 }

 static int get_samples_per_packet(MOVTrack *track)