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mxfdec: Make sure x < index_table->nb_ptses

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Without this the demuxer will SIGSEGV on files with IndexEntryCount < IndexDuration
This commit is contained in:
Tomas Härdin 2011-12-20 09:57:07 +01:00
parent 085249a379
commit 6e9081f4d8
1 changed files with 6 additions and 0 deletions
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6
libavformat/mxfdec.c
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@ -1085,6 +1085,12 @@ static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_ta
int offset = s->temporal_offset_entries[j] / index_delta;
int index = x + offset;
if (x >= index_table->nb_ptses) {
av_log(mxf->fc, AV_LOG_ERROR, "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
s->nb_index_entries, s->index_duration);
break;
}
index_table->fake_index[x].timestamp = x;
index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;