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mpegtspacketizer: Look harder for next sync position

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If ever we lose sync, we were just checking for the next 0x47 marker ...
which might actually happen within a mpeg-ts packet.

Instead check for 3 repeating 0x47 at the expected packet size interval,
which the same logic we use when we initially look for the packet size.
This commit is contained in:
Edward Hervey 2013-08-01 11:01:03 +02:00
parent c28acaa3c5
commit 3b60f88437
1 changed files with 5 additions and 3 deletions
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8
gst/mpegtsdemux/mpegtspacketizer.c
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@ -799,9 +799,11 @@ mpegts_packetizer_next_packet (MpegTSPacketizer2 * packetizer,
GST_LOG ("Lost sync %d", packet_size); GST_LOG ("Lost sync %d", packet_size);
/* Find the 0x47 in the buffer */ /* Find the 0x47 in the buffer (and require at least 2 checks) */
for (; sync_offset < priv->mapped_size; sync_offset++) for (; sync_offset < priv->mapped_size + 2 * packet_size; sync_offset++)
if (priv->mapped[sync_offset] == 0x47) if (priv->mapped[sync_offset] == 0x47 &&
priv->mapped[sync_offset + packet_size] == 0x47 &&
priv->mapped[sync_offset + 2 * packet_size] == 0x47)
break; break;
/* Pop out the remaining data... */ /* Pop out the remaining data... */