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Add visualization of late feedback packets, and avoid plotting incorrect delays computed based on those.

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BUG=None

Review-Url: https://codereview.webrtc.org/3009823002
Cr-Commit-Position: refs/heads/master@{#19705}
This commit is contained in:
stefan
2017-09-06 02:06:32 -07:00
committed by Commit Bot
parent ee3d760e45
commit a0a8ed78c3
1 changed files with 12 additions and 2 deletions
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14
webrtc/rtc_tools/event_log_visualizer/analyzer.cc
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@ -1247,6 +1247,7 @@ void EventLogAnalyzer::CreateNetworkDelayFeedbackGraph(Plot* plot) {
SimulatedClock clock(0);
TransportFeedbackAdapter feedback_adapter(&clock);
TimeSeries late_feedback_series("Late feedback results.", DOT_GRAPH);
TimeSeries time_series("Network Delay Change", LINE_DOT_GRAPH);
int64_t estimated_base_delay_ms = std::numeric_limits<int64_t>::max();
@ -1266,6 +1267,7 @@ void EventLogAnalyzer::CreateNetworkDelayFeedbackGraph(Plot* plot) {
};
int64_t time_us = std::min(NextRtpTime(), NextRtcpTime());
int64_t prev_y = 0;
while (time_us != std::numeric_limits<int64_t>::max()) {
clock.AdvanceTimeMicroseconds(time_us - clock.TimeInMicroseconds());
if (clock.TimeInMicroseconds() >= NextRtcpTime()) {
@ -1278,10 +1280,15 @@ void EventLogAnalyzer::CreateNetworkDelayFeedbackGraph(Plot* plot) {
feedback_adapter.GetTransportFeedbackVector();
SortPacketFeedbackVector(&feedback);
for (const PacketFeedback& packet : feedback) {
int64_t y = packet.arrival_time_ms - packet.send_time_ms;
float x =
static_cast<float>(clock.TimeInMicroseconds() - begin_time_) /
1000000;
if (packet.send_time_ms == -1) {
late_feedback_series.points.emplace_back(x, prev_y);
continue;
}
int64_t y = packet.arrival_time_ms - packet.send_time_ms;
prev_y = y;
estimated_base_delay_ms = std::min(y, estimated_base_delay_ms);
time_series.points.emplace_back(x, y);
}
@ -1307,8 +1314,11 @@ void EventLogAnalyzer::CreateNetworkDelayFeedbackGraph(Plot* plot) {
// observed during the call.
for (TimeSeriesPoint& point : time_series.points)
point.y -= estimated_base_delay_ms;
for (TimeSeriesPoint& point : late_feedback_series.points)
point.y -= estimated_base_delay_ms;
// Add the data set to the plot.
plot->AppendTimeSeries(std::move(time_series));
plot->AppendTimeSeriesIfNotEmpty(std::move(time_series));
plot->AppendTimeSeriesIfNotEmpty(std::move(late_feedback_series));
plot->SetXAxis(0, call_duration_s_, "Time (s)", kLeftMargin, kRightMargin);
plot->SetSuggestedYAxis(0, 10, "Delay (ms)", kBottomMargin, kTopMargin);