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Update rtpAnalyze matlab tool to handle reordered packets

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With this change, the tool will find and mark reordered packets in the
plot. Furthermore, the instantaneous send bitrate will be correct even
for reordered packets.

BUG=webrtc:2692
R=tina.legrand@webrtc.org

Review URL: https://codereview.webrtc.org/1172533004.

Cr-Commit-Position: refs/heads/master@{#9443}
This commit is contained in:
Henrik Lundin 2015-06-16 09:28:09 +02:00
parent ac81163011
commit 76381d921f
1 changed files with 35 additions and 3 deletions
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38
tools/matlab/rtpAnalyze.m
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@ -65,9 +65,12 @@ if length(uPT) > 1
end
fprintf('\n');
fprintf('Packets: %i\n', length(SeqNo));
SortSeqNo = sort(SeqNoUW);
fprintf('Missing sequence numbers: %i\n', ...
length(find(diff(sort(SeqNoUW)) > 1)));
fprintf('Reordered packets: %i\n', length(find(diff(sort(SeqNoUW)) < 1)));
length(find(diff(SortSeqNo) > 1)));
fprintf('Duplicated packets: %i\n', length(find(diff(SortSeqNo) == 0)));
reorderIx = findReorderedPackets(SeqNoUW);
fprintf('Reordered packets: %i\n', length(reorderIx));
tsdiff = diff(TimeStampUW);
tsdiff = tsdiff(diff(SeqNoUW) == 1);
[utsdiff, ~, ixtsdiff] = unique(tsdiff);
@ -117,8 +120,20 @@ fprintf('Received average bitrate: %i kbps\n', ...
%% Plots.
delay = ArrTime - SendTimeMs;
delay = delay - min(delay);
delayOrdered = delay;
delayOrdered(reorderIx) = nan; % Set reordered packets to NaN.
delayReordered = delay(reorderIx); % Pick the reordered packets.
sendTimeMsReordered = SendTimeMs(reorderIx);
% Sort time arrays in packet send order.
[~, sortix] = sort(SeqNoUW);
SendTimeMs = SendTimeMs(sortix);
Size = Size(sortix);
delayOrdered = delayOrdered(sortix);
figure
plot(SendTimeMs / 1000, delay);
plot(SendTimeMs / 1000, delayOrdered, ...
sendTimeMsReordered / 1000, delayReordered, 'r.');
xlabel('Send time [s]');
ylabel('Relative transport delay [ms]');
title(sprintf('SSRC: %s', SSRC{1}));
@ -130,6 +145,23 @@ xlabel('Send time [s]');
ylabel('Send bitrate [kbps]');
end
%% Subfunctions.
% findReorderedPackets returns the index to all packets that are considered
% old compared with the largest seen sequence number. The input seqNo must
% be unwrapped for this to work.
function reorderIx = findReorderedPackets(seqNo)
largestSeqNo = seqNo(1);
reorderIx = [];
for i = 2:length(seqNo)
if seqNo(i) < largestSeqNo
reorderIx = [reorderIx; i]; %#ok<AGROW>
else
largestSeqNo = seqNo(i);
end
end
end
%% Auto-generated subfunction.
function [SeqNo,TimeStamp,SendTime,Size,PT,M,SSRC] = ...
importfile(filename, startRow, endRow)