avformat/mp3dec: avoid seeking to negative positions

Fixes Ticket4038 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-11-18 04:04:37 +01:00 · 2014-11-18 04:04:37 +01:00 · 0b75b6c3cd
commit 0b75b6c3cd
parent 9bb6e1175f
1 changed files with 4 additions and 0 deletions
--- a/libavformat/mp3dec.c
+++ b/libavformat/mp3dec.c
@ -457,6 +457,10 @@ static int mp3_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
        int64_t pos = ie->pos + (dir > 0 ? i - 1024 : -i);
        int64_t candidate = -1;
        int score = 999;
+
+        if (pos < 0)
+            continue;
+
        for(j=0; j<MIN_VALID; j++) {
            ret = check(s, pos);
            if(ret < 0)