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hevc: Search start code in decode_nal_units().

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User may cut off a weird position and send a packet from there.
This avoids returning as invalid data immediately.
This commit is contained in:
Yusuke Nakamura 2013-10-21 02:36:51 +09:00 committed by Mickaël Raulet
parent 610a8b1537
commit f7f8801839
1 changed files with 9 additions and 8 deletions
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17
libavcodec/hevc.c
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@ -2325,14 +2325,15 @@ static int decode_nal_units(HEVCContext *s, const uint8_t *buf, int length)
goto fail; goto fail;
} }
} else { } else {
if (buf[2] == 0) { /* search start code */
length--; while (buf[0] != 0 || buf[1] != 0 || buf[2] != 1) {
buf++; ++buf;
continue; --length;
} if (length < 4) {
if (buf[0] != 0 || buf[1] != 0 || buf[2] != 1) { av_log(s->avctx, AV_LOG_ERROR, "No start code is found.\n");
ret = AVERROR_INVALIDDATA; ret = AVERROR_INVALIDDATA;
goto fail; goto fail;
}
} }
buf += 3; buf += 3;