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mxfdec: Make sure x < index_table->nb_ptses

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Avoids a SIGSEGV on files with IndexEntryCount < IndexDuration.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Tomas Härdin 2012-01-26 13:21:31 +01:00 committed by Diego Biurrun
parent f769cfedd8
commit a3923482f2
1 changed files with 7 additions and 0 deletions
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7
libavformat/mxfdec.c
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@ -1113,6 +1113,13 @@ static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_ta
int offset = s->temporal_offset_entries[j] / index_delta; int offset = s->temporal_offset_entries[j] / index_delta;
int index = x + offset; 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].timestamp = x;
index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0; index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;