16825b1a82
Existing code was inconsistent about whether to use uint16_t, int, unsigned int, or uint32_t, and sometimes silently truncated one to another, or truncated int64_t. Because most core time-handling functions use int64_t, being consistent about using int64_t unless otherwise necessary minimizes the number of explicit or implicit casts. BUG=chromium:81439 TEST=none R=henrik.lundin@webrtc.org, holmer@google.com, tommi@webrtc.org Review URL: https://webrtc-codereview.appspot.com/31349004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@8045 4adac7df-926f-26a2-2b94-8c16560cd09d
81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
/*
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* Copyright (c) 2014 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_REMOTE_BITRATE_ESTIMATOR_MIMD_RATE_CONTROL_H_
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#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_MIMD_RATE_CONTROL_H_
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#include "webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h"
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#include "webrtc/modules/remote_bitrate_estimator/remote_rate_control.h"
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namespace webrtc {
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// A RemoteRateControl implementation based on multiplicative increases of
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// bitrate when no over-use is detected and multiplicative decreases when
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// over-uses are detected.
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class MimdRateControl : public RemoteRateControl {
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public:
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explicit MimdRateControl(uint32_t min_bitrate_bps);
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virtual ~MimdRateControl() {}
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// Implements RemoteRateControl.
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virtual RateControlType GetControlType() const OVERRIDE;
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virtual uint32_t GetMinBitrate() const OVERRIDE;
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virtual bool ValidEstimate() const OVERRIDE;
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virtual int64_t GetFeedbackInterval() const OVERRIDE;
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virtual bool TimeToReduceFurther(
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int64_t time_now, uint32_t incoming_bitrate_bps) const OVERRIDE;
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virtual uint32_t LatestEstimate() const OVERRIDE;
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virtual uint32_t UpdateBandwidthEstimate(int64_t now_ms) OVERRIDE;
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virtual void SetRtt(int64_t rtt) OVERRIDE;
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virtual RateControlRegion Update(const RateControlInput* input,
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int64_t now_ms) OVERRIDE;
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virtual void SetEstimate(int bitrate_bps, int64_t now_ms) OVERRIDE;
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private:
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uint32_t ChangeBitRate(uint32_t current_bit_rate,
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uint32_t incoming_bit_rate,
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double delay_factor,
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int64_t now_ms);
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double RateIncreaseFactor(int64_t now_ms,
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int64_t last_ms,
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int64_t reaction_time_ms,
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double noise_var) const;
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void UpdateChangePeriod(int64_t now_ms);
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void UpdateMaxBitRateEstimate(float incoming_bit_rate_kbps);
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void ChangeState(const RateControlInput& input, int64_t now_ms);
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void ChangeState(RateControlState new_state);
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void ChangeRegion(RateControlRegion region);
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uint32_t min_configured_bit_rate_;
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uint32_t max_configured_bit_rate_;
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uint32_t current_bit_rate_;
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uint32_t max_hold_rate_;
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float avg_max_bit_rate_;
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float var_max_bit_rate_;
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RateControlState rate_control_state_;
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RateControlState came_from_state_;
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RateControlRegion rate_control_region_;
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int64_t last_bit_rate_change_;
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RateControlInput current_input_;
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bool updated_;
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int64_t time_first_incoming_estimate_;
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bool initialized_bit_rate_;
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float avg_change_period_;
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int64_t last_change_ms_;
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float beta_;
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int64_t rtt_;
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int64_t time_of_last_log_;
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DISALLOW_IMPLICIT_CONSTRUCTORS(MimdRateControl);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_MIMD_RATE_CONTROL_H_
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