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ff_read_timestamp: check stream_index before using it as array index 

Fixes out of array read

Found-by: durandal_1707
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-18 19:48:44 +01:00
parent 85921499c7
commit 695a766bff
1 changed files with 4 additions and 1 deletions
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5
libavformat/utils.c
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@ -1767,7 +1767,10 @@ int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp,
static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
{
return wrap_timestamp(s->streams[stream_index], read_timestamp(s, stream_index, ppos, pos_limit));
int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit);
if (stream_index >= 0)
ts = wrap_timestamp(s->streams[stream_index], ts);
return ts;
}
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)