commit 84916937b70472715efe5682bc273e91c3a72695
author Taylor Brandstetter <deadbeef@webrtc.org> Mon Jun 25 22:50:26 2018
committer Commit Bot <commit-bot@chromium.org> Mon Jun 25 23:56:39 2018
tree 9bb205be9dc6dda2f8c0adef0144397c5bf1c24c
parent 111fdfd7320416faf92e4b4c6d37d0e7021a837c

Update packetsLost and jitter stats any time a packet is received.

Before this CL, the packetsLost and jitter stats (as returned by
GetStats, at the API level) were only being updated when an RTCP SR or
RR is generated. According to the stats spec, "local" stats like this
should be updated any time a packet is received.

This CL also fixes some minor issues with the calculation of packetsLost
(and fractionLost):
* Packets weren't being count as lost if lost over a sequence number
  rollover.
* Temporary periods of "negative" loss (caused by duplicate or out of
  order packets) weren't being accumulated into the cumulative loss
  counter. Example:
  Period 1: Received packets 1, 2, 4
    Loss over that period: 1 (expected 4 packets, got 3)
    Reported cumulative loss: 1
  Period 2: Received packets 3, 5
    Loss over that period: -1 (expected 1 packet, got 2)
    Reported cumulative loss: 1 (should be 0!)

Landing with NOTRY because Android compile bots are broken for an
unrelated reason.
NOTRY=True

Bug: webrtc:8804
Change-Id: I840ba34de8957b1276f6bdaf93718f805629f5c8
Reviewed-on: https://webrtc-review.googlesource.com/50020
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23731}