mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-12 21:30:45 +01:00
96e3b991da
Bug: webrtc:12338 Change-Id: I72fcb505a92f03b2ace7160ee33d555a977eddfd Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226955 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#34587}
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
/*
|
|
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#ifndef RTC_BASE_NUMERICS_HISTOGRAM_PERCENTILE_COUNTER_H_
|
|
#define RTC_BASE_NUMERICS_HISTOGRAM_PERCENTILE_COUNTER_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <map>
|
|
#include <vector>
|
|
|
|
#include "absl/types/optional.h"
|
|
|
|
namespace rtc {
|
|
// Calculates percentiles on the stream of data. Use `Add` methods to add new
|
|
// values. Use `GetPercentile` to get percentile of the currently added values.
|
|
class HistogramPercentileCounter {
|
|
public:
|
|
// Values below `long_tail_boundary` are stored as the histogram in an array.
|
|
// Values above - in a map.
|
|
explicit HistogramPercentileCounter(uint32_t long_tail_boundary);
|
|
~HistogramPercentileCounter();
|
|
void Add(uint32_t value);
|
|
void Add(uint32_t value, size_t count);
|
|
void Add(const HistogramPercentileCounter& other);
|
|
// Argument should be from 0 to 1.
|
|
absl::optional<uint32_t> GetPercentile(float fraction);
|
|
|
|
private:
|
|
std::vector<size_t> histogram_low_;
|
|
std::map<uint32_t, size_t> histogram_high_;
|
|
const uint32_t long_tail_boundary_;
|
|
size_t total_elements_;
|
|
size_t total_elements_low_;
|
|
};
|
|
} // namespace rtc
|
|
#endif // RTC_BASE_NUMERICS_HISTOGRAM_PERCENTILE_COUNTER_H_
|