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3be2a55e7f
This is a reland of 1880c7162b
Original change's description:
> Updated analysis in videoprocessor.
>
> - Run analysis after all frames are processed. Before part of it was
> done at bitrate change points;
> - Analysis is done for whole stream as well as for each rate update
> interval;
> - Changed units from number of frames to time units for some metrics
> and thresholds. E.g. 'num frames to hit tagret bitrate' is changed to
> 'time to reach target bitrate, sec';
> - Changed data type of FrameStatistic::max_nalu_length (renamed to
> max_nalu_size_bytes) from rtc::Optional to size_t. There it no need to
> use such advanced data type in such low level data structure.
>
> Bug: webrtc:8524
> Change-Id: Ic9f6eab5b15ee12a80324b1f9c101de1bf3c702f
> Reviewed-on: https://webrtc-review.googlesource.com/31901
> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
> Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> Reviewed-by: Åsa Persson <asapersson@webrtc.org>
> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#21653}
TBR=brandtr@webrtc.org, stefan@webrtc.org
Bug: webrtc:8524
Change-Id: Ie0ad7790689422ffa61da294967fc492a13b75ae
Reviewed-on: https://webrtc-review.googlesource.com/40202
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21668}
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "test/statistics.h"
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#include <math.h>
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#include <algorithm>
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namespace webrtc {
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namespace test {
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Statistics::Statistics()
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: sum_(0.0),
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sum_squared_(0.0),
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max_(std::numeric_limits<double>::min()),
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min_(std::numeric_limits<double>::max()),
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count_(0) {}
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void Statistics::AddSample(double sample) {
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sum_ += sample;
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sum_squared_ += sample * sample;
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max_ = std::max(max_, sample);
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min_ = std::min(min_, sample);
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++count_;
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}
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double Statistics::Max() const {
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return max_;
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}
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double Statistics::Mean() const {
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if (count_ == 0)
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return 0.0;
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return sum_ / count_;
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}
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double Statistics::Min() const {
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return min_;
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}
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double Statistics::Variance() const {
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if (count_ == 0)
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return 0.0;
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return sum_squared_ / count_ - Mean() * Mean();
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}
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double Statistics::StandardDeviation() const {
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return sqrt(Variance());
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}
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} // namespace test
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} // namespace webrtc
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