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9de4ef4b24
Negative infinity is useful in comparisons as it represents a value guaranteed to be less than any other timestamp. This avoid using Timestamp::ms(0) to represent such a value or having to use optional for the special case of first time execution. To avoid ambiguity, Timestamp::Infinity is renamed to PlusInfinity. Bug: webrtc:9709 Change-Id: Ib2debff91036e94d1dc903ec0c6faae30febde4e Reviewed-on: https://webrtc-review.googlesource.com/79440 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24556}
50 lines
1.7 KiB
C++
50 lines
1.7 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 MODULES_CONGESTION_CONTROLLER_BBR_DATA_TRANSFER_TRACKER_H_
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#define MODULES_CONGESTION_CONTROLLER_BBR_DATA_TRANSFER_TRACKER_H_
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#include <deque>
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#include "api/units/data_size.h"
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#include "api/units/time_delta.h"
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#include "api/units/timestamp.h"
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namespace webrtc {
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namespace bbr {
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class DataTransferTracker {
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public:
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struct Result {
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TimeDelta ack_timespan = TimeDelta::Zero();
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TimeDelta send_timespan = TimeDelta::Zero();
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DataSize acked_data = DataSize::Zero();
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};
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DataTransferTracker();
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~DataTransferTracker();
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void AddSample(DataSize size_delta, Timestamp send_time, Timestamp ack_time);
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void ClearOldSamples(Timestamp excluding_end);
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// Get the average data rate in the window that starts with the last ack which
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// comes before covered_start and ends at the first ack that comes after or at
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// including_end.
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Result GetRatesByAckTime(Timestamp covered_start, Timestamp including_end);
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private:
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struct Sample {
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Timestamp ack_time = Timestamp::PlusInfinity();
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Timestamp send_time = Timestamp::PlusInfinity();
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DataSize size_delta = DataSize::Zero();
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DataSize size_sum = DataSize::Zero();
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};
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std::deque<Sample> samples_;
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DataSize size_sum_ = DataSize::Zero();
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};
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} // namespace bbr
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} // namespace webrtc
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#endif // MODULES_CONGESTION_CONTROLLER_BBR_DATA_TRANSFER_TRACKER_H_
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