zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Probing: Add support for exponential startup probing

Browse Source 
Adds support for exponentially probing the bandwidth at start-up to allow
ramp-up to real capacity of the network.

BUG=webrtc:6332
R=philipel@webrtc.org, stefan@webrtc.org

Review URL: https://codereview.webrtc.org/2235373004 .

Cr-Commit-Position: refs/heads/master@{#14189}
This commit is contained in:
Irfan Sheriff
2016-09-12 12:28:54 -07:00
parent a421ddd60e
commit b2540bb99f
25 changed files with 353 additions and 112 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
webrtc/modules/congestion_controller/probe_controller.h Normal file
View File

@ -0,0 +1,62 @@
/*
* Copyright (c) 2016 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 WEBRTC_MODULES_CONGESTION_CONTROLLER_PROBE_CONTROLLER_H_
#define WEBRTC_MODULES_CONGESTION_CONTROLLER_PROBE_CONTROLLER_H_
#include <initializer_list>
#include "webrtc/base/criticalsection.h"
#include "webrtc/common_types.h"
#include "webrtc/modules/pacing/paced_sender.h"
namespace webrtc {
class Clock;
// This class controls initiation of probing to estimate initial channel
// capacity. There is also support for probing during a session when max
// bitrate is adjusted by an application.
class ProbeController {
public:
ProbeController(PacedSender* pacer, Clock* clock);
void SetBitrates(int min_bitrate_bps,
int start_bitrate_bps,
int max_bitrate_bps);
void SetEstimatedBitrate(int bitrate_bps);
private:
void InitiateProbing(std::initializer_list<int> bitrates_to_probe,
int min_bitrate_to_probe_further_bps)
EXCLUSIVE_LOCKS_REQUIRED(critsect_);
enum class State {
// Initial state where no probing has been triggered yet.
kInit,
// Waiting for probing results to continue further probing.
kWaitingForProbingResult,
// Probing is complete.
kProbingComplete,
};
rtc::CriticalSection critsect_;
PacedSender* const pacer_;
Clock* const clock_;
State state_ GUARDED_BY(critsect_);
int min_bitrate_to_probe_further_bps_ GUARDED_BY(critsect_);
int64_t time_last_probing_initiated_ms_ GUARDED_BY(critsect_);
int estimated_bitrate_bps_ GUARDED_BY(critsect_);
int max_bitrate_bps_ GUARDED_BY(critsect_);
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(ProbeController);
};
} // namespace webrtc
#endif // WEBRTC_MODULES_CONGESTION_CONTROLLER_PROBE_CONTROLLER_H_