8c68845090
Variance calculation isn't currently used but overflow checks there may cause unnecessary crash. Instead of completely deleting useful feature it's now easy to disable it by choosing an appropriate Counter class. Bug: None Change-Id: Ifa8bbf2d023553504caa768e08e59ebccfb2fbb4 Reviewed-on: https://webrtc-review.googlesource.com/99561 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24699}
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018 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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#ifndef RTC_BASE_NUMERICS_SAMPLE_COUNTER_H_
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#define RTC_BASE_NUMERICS_SAMPLE_COUNTER_H_
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#include "absl/types/optional.h"
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namespace rtc {
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// Simple utility class for counting basic statistics (max./avg./variance) on
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// stream of samples.
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class SampleCounter {
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public:
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SampleCounter();
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~SampleCounter();
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void Add(int sample);
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absl::optional<int> Avg(int64_t min_required_samples) const;
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absl::optional<int> Max() const;
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void Reset();
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// Adds all the samples from the |other| SampleCounter as if they were all
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// individually added using |Add(int)| method.
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void Add(const SampleCounter& other);
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protected:
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int64_t sum_ = 0;
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int64_t num_samples_ = 0;
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absl::optional<int> max_;
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};
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class SampleCounterWithVariance : public SampleCounter {
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public:
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SampleCounterWithVariance();
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~SampleCounterWithVariance();
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void Add(int sample);
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absl::optional<int64_t> Variance(int64_t min_required_samples) const;
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void Reset();
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// Adds all the samples from the |other| SampleCounter as if they were all
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// individually added using |Add(int)| method.
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void Add(const SampleCounterWithVariance& other);
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private:
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int64_t sum_squared_ = 0;
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};
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} // namespace rtc
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#endif // RTC_BASE_NUMERICS_SAMPLE_COUNTER_H_
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