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

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
This commit is contained in:
Joakim Plate 2012-02-03 19:13:45 +00:00 committed by Justin Ruggles
parent e54165aa39
commit b69c2e0e6d
1 changed files with 5 additions and 3 deletions
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8
libavformat/yop.c
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@ -184,8 +184,6 @@ 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;
@ -196,9 +194,13 @@ 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;
}