Median filter

If the array size is even, the median should be average of its two middlemost elements.

NADA unittests updated accordingly.

BUG=webrtc:4550
R=stefan@webrtc.org

Committed: https://chromium.googlesource.com/external/webrtc/+/496019c5961cdda13181ff51a3abf0d09d315cc4

[magalhaesc, 2015-07-22 08:17:46]

magalhaesc@google.com changed reviewers:
+ stefan@webrtc.org

[magalhaesc, 2015-07-22 09:01:11]

Minor change on NADA::MedianFilter

https://codereview.webrtc.org/1246083006/diff/1/webrtc/modules/remote_bitrate...
File webrtc/modules/remote_bitrate_estimator/test/estimators/nada.cc (right):

https://codereview.webrtc.org/1246083006/diff/1/webrtc/modules/remote_bitrate...
webrtc/modules/remote_bitrate_estimator/test/estimators/nada.cc:134: if (size %
2 == 1) {
This "if" statement isn't necessary here. But it avoids unnecessary nth_element
computations (since currently nearly all calls use size = 5).

[stefan-webrtc, 2015-07-22 09:21:19]

lgtm

https://codereview.webrtc.org/1246083006/diff/1/webrtc/modules/remote_bitrate...
File webrtc/modules/remote_bitrate_estimator/test/estimators/nada.cc (right):

https://codereview.webrtc.org/1246083006/diff/1/webrtc/modules/remote_bitrate...
webrtc/modules/remote_bitrate_estimator/test/estimators/nada.cc:132:
array_copy.end());
Move this inside the if statement.

[magalhaesc, 2015-07-22 09:23:56]

Comment addressed

[magalhaesc, 2015-07-22 09:30:41]

Committed patchset #2 (id:20001) manually as
496019c5961cdda13181ff51a3abf0d09d315cc4 (presubmit successful).