[FFmpeg-cvslog] [yop] Check return value of avio_seek and avoid modifying state if it fails

[Joakim Plate]

ffmpeg | branch: master | Joakim Plate <elupus at ecce.se> | Wed Sep 14 19:43:38 2011 +0200| [5d7053680479a75562258c010715761c4285fd7f] | committer: Joakim Plate

[yop] Check return value of avio_seek and avoid modifying state if it fails

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5d7053680479a75562258c010715761c4285fd7f
---

 libavformat/yop.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/libavformat/yop.c b/libavformat/yop.c
index da4f050..9e548f0 100644
--- a/libavformat/yop.c
+++ b/libavformat/yop.c
@@ -183,8 +183,6 @@ static int yop_read_seek(AVFormatContext *s, int stream_index,
     int64_t frame_pos, pos_min, pos_max;
     int frame_count;
 
-    av_free_packet(&yop->video_packet);
-
     if (!stream_index)
         return -1;
 
@@ -195,9 +193,13 @@ static int yop_read_seek(AVFormatContext *s, int stream_index,
     timestamp      = FFMAX(0, FFMIN(frame_count, timestamp));
 
     frame_pos      = timestamp * yop->frame_size + pos_min;
+
+    if (avio_seek(s->pb, frame_pos, SEEK_SET) < 0)
+        return -1;
+
+    av_free_packet(&yop->video_packet);
     yop->odd_frame = timestamp & 1;
 
-    avio_seek(s->pb, frame_pos, SEEK_SET);
     return 0;
 }