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rtpsource: Track the seqnum for senders

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RTP source statistics are tracked for local senders by
treating them as a receiver of their own outbound packets.

Accordingly, track the highest packet seqnum so that the
packets-lost calculation generates a sensible number instead
of always reporting -$number_of_packets_sent

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3454>
This commit is contained in:
Jan Schmidt 2022-11-23 16:37:40 +11:00 committed by GStreamer Marge Bot
parent 843f10f7f9
commit cb225b3682
1 changed files with 22 additions and 0 deletions
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22
subprojects/gst-plugins-good/gst/rtpmanager/rtpsource.c
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@ -1251,6 +1251,28 @@ update_receiver_stats (RTPSource * src, RTPPacketInfo * pinfo,
GST_INFO ("duplicate or reordered packet (seqnr %u, expected %u)",
seqnr, expected);
}
} else {
/* Sender stats - update the outbound sequence number */
expected = src->stats.max_seq + 1;
delta = gst_rtp_buffer_compare_seqnum (expected, seqnr);
/* No probation for local senders, just check for lost / dropouts */
if (delta >= 0 && delta < max_dropout) {
stats->bad_seq = RTP_SEQ_MOD + 1; /* so seq == bad_seq is false */
/* in order, with permissible gap */
if (seqnr < stats->max_seq) {
/* sequence number wrapped - count another 64K cycle. */
stats->cycles += RTP_SEQ_MOD;
}
stats->max_seq = seqnr;
} else if (delta < -max_misorder || delta >= max_dropout) {
/* the sequence number made a very large jump */
if (seqnr != stats->bad_seq) {
/* unacceptable jump */
stats->bad_seq = (seqnr + 1) & (RTP_SEQ_MOD - 1);
}
} else { /* delta < 0 && delta >= -max_misorder */
stats->bad_seq = RTP_SEQ_MOD + 1; /* so seq == bad_seq is false */
}
}
src->stats.octets_received += pinfo->payload_len;