3168781d2f
This is a simple application limited region detector that is quite conservative at the moment. We detect as being application-limited if we see sending rate as less than 30% of the estimated bandwidth over 500 ms. The moment we detect a single burst above 30% over a 100 ms period, we consider ourselves network limited. This class is currently not used. A follow up CL will leverage this to enable probing. BUG=webrtc:6332 Review-Url: https://codereview.webrtc.org/2340763004 Cr-Commit-Position: refs/heads/master@{#14505}
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*
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* Copyright (c) 2016 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 WEBRTC_MODULES_PACING_ALR_DETECTOR_H_
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#define WEBRTC_MODULES_PACING_ALR_DETECTOR_H_
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#include "webrtc/common_types.h"
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#include "webrtc/modules/pacing/paced_sender.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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// Application limited region detector is a class that utilizes signals of
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// elapsed time and bytes sent to estimate whether network traffic is
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// currently limited by the application's ability to generate traffic.
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//
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// AlrDetector provides a signal that can be utilized to adjust
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// estimate bandwidth.
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// Note: This class is not thread-safe.
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class AlrDetector {
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public:
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AlrDetector();
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~AlrDetector();
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void OnBytesSent(size_t bytes_sent, int64_t elapsed_time_ms);
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// Set current estimated bandwidth.
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void SetEstimatedBitrate(int bitrate_bps);
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// Returns true if currently in application-limited region.
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bool InApplicationLimitedRegion();
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private:
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size_t measurement_interval_bytes_sent_;
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int64_t measurement_interval_elapsed_time_ms_;
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int estimated_bitrate_bps_;
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// Number of consecutive periods over which we observe traffic is application
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// limited.
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int application_limited_count_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_PACING_ALR_DETECTOR_H_
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