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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2013 Blender Foundation. All rights reserved. */
/** \file
* \ingroup depsgraph
*/
#pragma once
namespace blender {
namespace deg {
/* Utility class which takes care of calculating average of time series, such as FPS counters. */
template<int MaxSamples> class AveragedTimeSampler {
public:
AveragedTimeSampler() : num_samples_(0), next_sample_index_(0)
{
}
void add_sample(double value)
{
samples_[next_sample_index_] = value;
/* Move to the next index, keeping wrapping at the end of array into account. */
++next_sample_index_;
if (next_sample_index_ == MaxSamples) {
next_sample_index_ = 0;
}
/* Update number of stored samples. */
if (num_samples_ != MaxSamples) {
++num_samples_;
}
}
double get_averaged() const
{
double sum = 0.0;
for (int i = 0; i < num_samples_; ++i) {
sum += samples_[i];
}
return sum / num_samples_;
}
protected:
double samples_[MaxSamples];
/* Number of samples which are actually stored in the array. */
int num_samples_;
/* Index in the samples_ array under which next sample will be stored. */
int next_sample_index_;
};
} // namespace deg
} // namespace blender
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