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92ea95e34a
In https://webrtc-review.googlesource.com/c/src/+/1560 we moved WebRTC from src/webrtc to src/ (in order to preserve an healthy git history). This CL takes care of fixing header guards, #include paths, etc... NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iea91618212bee0af16aa3f05071eab8f93706578 Reviewed-on: https://webrtc-review.googlesource.com/1561 Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19846}
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
/*
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* Copyright 2015 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_RATETRACKER_H_
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#define RTC_BASE_RATETRACKER_H_
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#include <stdlib.h>
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#include "rtc_base/basictypes.h"
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namespace rtc {
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// Computes units per second over a given interval by tracking the units over
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// each bucket of a given size and calculating the instantaneous rate assuming
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// that over each bucket the rate was constant.
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class RateTracker {
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public:
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RateTracker(int64_t bucket_milliseconds, size_t bucket_count);
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virtual ~RateTracker();
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// Computes the average rate over the most recent interval_milliseconds,
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// or if the first sample was added within this period, computes the rate
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// since the first sample was added.
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double ComputeRateForInterval(int64_t interval_milliseconds) const;
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// Computes the average rate over the rate tracker's recording interval
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// of bucket_milliseconds * bucket_count.
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double ComputeRate() const {
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return ComputeRateForInterval(bucket_milliseconds_ *
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static_cast<int64_t>(bucket_count_));
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}
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// Computes the average rate since the first sample was added to the
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// rate tracker.
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double ComputeTotalRate() const;
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// The total number of samples added.
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size_t TotalSampleCount() const;
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// Reads the current time in order to determine the appropriate bucket for
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// these samples, and increments the count for that bucket by sample_count.
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void AddSamples(size_t sample_count);
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protected:
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// overrideable for tests
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virtual int64_t Time() const;
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private:
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void EnsureInitialized();
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size_t NextBucketIndex(size_t bucket_index) const;
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const int64_t bucket_milliseconds_;
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const size_t bucket_count_;
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size_t* sample_buckets_;
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size_t total_sample_count_;
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size_t current_bucket_;
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int64_t bucket_start_time_milliseconds_;
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int64_t initialization_time_milliseconds_;
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};
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} // namespace rtc
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#endif // RTC_BASE_RATETRACKER_H_
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