edb9f00df7
This change is the complete Widevine metrics system. It will measure and record runtime information about what is happening in the CDM - such as errors and throughput. Bug: 33745339 Bug: 26027857 Change-Id: Ic9a82074f1e2b72c72d751b235f8ae361232787d
34 lines
730 B
C++
34 lines
730 B
C++
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// This file contains the definitions for the Distribution class members.
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#include "distribution.h"
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#include <float.h>
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namespace wvcdm {
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namespace metrics {
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Distribution::Distribution() :
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count_(0LL),
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min_(DBL_MAX),
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max_(-DBL_MAX),
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mean_(0.0),
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sum_squared_deviation_(0.0) {
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}
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void Distribution::Record(double value) {
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// Using method of provisional means.
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double deviation = value - mean_;
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mean_ = mean_ + (deviation / ++count_);
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sum_squared_deviation_ =
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sum_squared_deviation_ + (deviation * (value - mean_));
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min_ = min_ < value ? min_ : value;
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max_ = max_ > value ? max_ : value;
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}
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} // namespace metrics
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} // namespace wvcdm
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