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asfdec: convert condition for the replicated data reading to be safer

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Alexandra Hájková 2015-07-17 14:17:05 +02:00 committed by Anton Khirnov
parent 406627287e
commit 0989d3ad1f
1 changed files with 2 additions and 2 deletions
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4
libavformat/asfdec.c
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@ -1133,7 +1133,7 @@ static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
} else
avio_skip(pb, 4); // reading of media object size is already done
asf_pkt->dts = avio_rl32(pb); // read presentation time
if (asf->rep_data_len && ((asf->rep_data_len - 8) > 0))
if (asf->rep_data_len && (asf->rep_data_len >= 8))
avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
}
pay_len = avio_rl16(pb); // payload length should be WORD
@ -1183,7 +1183,7 @@ static int asf_read_single_payload(AVFormatContext *s, AVPacket *pkt,
} else
avio_skip(pb, 4); // skip media object size
asf_pkt->dts = avio_rl32(pb); // read presentation time
if ((asf->rep_data_len - 8) > 0)
if (asf->rep_data_len >= 8)
avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
offset = avio_tell(pb);