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h2645_parse: only read avc length code at the correct position

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Reading it from any other position would result in a wrong size being
read, instead fallback to the re-sync mechanic in the else clause.
This commit is contained in:
Hendrik Leppkes 2016-07-07 20:18:26 +02:00
parent b450b82514
commit c3e9b098e1
1 changed files with 4 additions and 1 deletions
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5
libavcodec/h2645_parse.c
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@ -258,7 +258,7 @@ int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
int extract_length = 0;
int skip_trailing_zeros = 1;
if (buf >= next_avc) {
if (buf == next_avc) {
int i;
for (i = 0; i < nal_length_size; i++)
extract_length = (extract_length << 8) | buf[i];
@ -271,6 +271,9 @@ int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
}
next_avc = buf + extract_length;
} else {
if (buf > next_avc)
av_log(logctx, AV_LOG_WARNING, "Exceeded next NALFF position, re-syncing.\n");
/* search start code */
while (buf[0] != 0 || buf[1] != 0 || buf[2] != 1) {
++buf;