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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-27 19:07:00 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-04-23 21:29:01 +0200 |
| commit | 575e88e0893453ed510b58723540876af4faf8c1 (patch) | |
| tree | 7714a442bbd806fb28e974975ae098372d833ae6 | |
| parent | ae9ec86ef305091df002380b06002b6511e9436d (diff) | |
| download | ffmpeg-575e88e0893453ed510b58723540876af4faf8c1.tar.gz | |
avformat/mpegts: Improve the position determination for avpriv_mpegts_parse_packet()
Fixes: assertion failure
Fixes: Ticket 8005
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e5bb48ae5990347dff22fc38ff5a1c1f7f60a1c5)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mpegts.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c index 370ebc20ea..4db526d330 100644 --- a/libavformat/mpegts.c +++ b/libavformat/mpegts.c @@ -2164,13 +2164,12 @@ static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet); /* handle one TS packet */ -static int handle_packet(MpegTSContext *ts, const uint8_t *packet) +static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos) { MpegTSFilter *tss; int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity, has_adaptation, has_payload; const uint8_t *p, *p_end; - int64_t pos; pid = AV_RB16(packet + 1) & 0x1fff; if (pid && discard_pid(ts, pid)) @@ -2227,7 +2226,6 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) if (p >= p_end || !has_payload) return 0; - pos = avio_tell(ts->stream->pb); if (pos >= 0) { av_assert0(pos >= TS_PACKET_SIZE); ts->pos47_full = pos - TS_PACKET_SIZE; @@ -2430,7 +2428,7 @@ static int handle_packets(MpegTSContext *ts, int64_t nb_packets) ret = read_packet(s, packet, ts->raw_packet_size, &data); if (ret != 0) break; - ret = handle_packet(ts, data); + ret = handle_packet(ts, data, avio_tell(s->pb)); finished_reading_packet(s, ts->raw_packet_size); if (ret != 0) break; @@ -2820,7 +2818,7 @@ int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, buf++; len--; } else { - handle_packet(ts, buf); + handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE); buf += TS_PACKET_SIZE; len -= TS_PACKET_SIZE; if (ts->stop_parse == 1) |