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Avoids mismatching packets on wraparound in log parser.

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Bug: webrtc:10170
Change-Id: I364b69d0218ba6fcec1174fdfb9f52847febc9a5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/134465
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27837}
This commit is contained in:
Sebastian Jansson 2019-04-29 13:53:39 +02:00 committed by Commit Bot
parent bd20c3f5ae
commit 26f40a89d6
1 changed files with 22 additions and 2 deletions
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24
logging/rtc_event_log/rtc_event_log_parser.cc
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@ -1933,6 +1933,13 @@ std::vector<LoggedPacketInfo> ParsedRtcEventLog::GetPacketInfos(
current_overhead = overhead_iter->overhead;
++overhead_iter;
}
// If we have a large time delta, it can be caused by a gap in logging,
// therefore we don't want to match up sequence numbers as we might have had
// a wraparound.
if (new_log_time - last_log_time > TimeDelta::seconds(30)) {
seq_num_unwrapper = SequenceNumberUnwrapper();
indices.clear();
}
RTC_DCHECK(new_log_time >= last_log_time);
last_log_time = new_log_time;
};
@ -1963,6 +1970,14 @@ std::vector<LoggedPacketInfo> ParsedRtcEventLog::GetPacketInfos(
logged.log_feedback_time = Timestamp::PlusInfinity();
int64_t unwrapped_seq_num =
seq_num_unwrapper.Unwrap(logged.transport_seq_no);
if (indices.find(unwrapped_seq_num) != indices.end()) {
auto prev = packets[indices[unwrapped_seq_num]];
RTC_LOG(LS_WARNING)
<< "Repeated sent packet sequence number: " << unwrapped_seq_num
<< " Packet time:" << prev.log_packet_time.seconds() << "s vs "
<< logged.log_packet_time.seconds()
<< "s at:" << rtp.log_time_ms() / 1000;
}
indices[unwrapped_seq_num] = packets.size();
}
packets.push_back(logged);
@ -1990,13 +2005,13 @@ std::vector<LoggedPacketInfo> ParsedRtcEventLog::GetPacketInfos(
std::vector<LoggedPacketInfo*> packet_feedbacks;
packet_feedbacks.reserve(feedback.GetAllPackets().size());
Timestamp receive_timestamp = feedback_base_time;
std::vector<int64_t> unknown_seq_nums;
for (const auto& packet : feedback.GetAllPackets()) {
int64_t unwrapped_seq_num =
seq_num_unwrapper.Unwrap(packet.sequence_number());
auto it = indices.find(unwrapped_seq_num);
if (it == indices.end()) {
RTC_LOG(LS_WARNING) << "Received feedback for unknown packet: "
<< unwrapped_seq_num;
unknown_seq_nums.push_back(unwrapped_seq_num);
continue;
}
LoggedPacketInfo* sent = &packets[it->second];
@ -2021,6 +2036,11 @@ std::vector<LoggedPacketInfo> ParsedRtcEventLog::GetPacketInfos(
}
packet_feedbacks.push_back(sent);
}
if (!unknown_seq_nums.empty()) {
RTC_LOG(LS_WARNING)
<< "Received feedback for unknown packets: "
<< unknown_seq_nums.front() << " - " << unknown_seq_nums.back();
}
if (packet_feedbacks.empty())
return;
LoggedPacketInfo* last = packet_feedbacks.back();