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mxfdec: Sanity check PreviousPartition 

Without this certain files could get the demuxer stuck in a loop
This commit is contained in:
Tomas Härdin 2011-12-21 10:56:59 +01:00
parent e7839602f4
commit 46d65fb8a5
1 changed files with 7 additions and 0 deletions
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7
libavformat/mxfdec.c
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@ -479,6 +479,13 @@ static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size
partition->previous_partition, footer_partition,
partition->index_sid, partition->body_sid);
/* sanity check PreviousPartition if set */
if (partition->previous_partition &&
mxf->run_in + partition->previous_partition >= klv_offset) {
av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition points to this partition or forward\n");
return AVERROR_INVALIDDATA;
}
if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;