Improve bitrate probing for the audio-only case.

webrtc/modules/pacing/alr_detector.cc

 /*
  *  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.
  */
 
 #include "webrtc/modules/pacing/alr_detector.h"
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 
 namespace {
 
 // Time period over which outgoing traffic is measured.
 constexpr int kMeasurementPeriodMs = 500;
 
 // Sent traffic percentage as a function of network capacity used to determine
 // application-limited region. ALR region start when bandwidth usage drops below
 // kAlrStartUsagePercent and ends when it raises above kAlrEndUsagePercent.
 // NOTE: This is intentionally conservative at the moment until BW adjustments
 // of application limited region is fine tuned.
-constexpr int kAlrStartUsagePercent = 30;
-constexpr int kAlrEndUsagePercent = 50;
+constexpr int kAlrStartUsagePercent = 60;
+constexpr int kAlrEndUsagePercent = 70;
 
 }  // namespace
 
 namespace webrtc {
 
 AlrDetector::AlrDetector()
     : rate_(kMeasurementPeriodMs, RateStatistics::kBpsScale) {}
 
 AlrDetector::~AlrDetector() {}
 
@@ skipping 17 matching lines @@
   RTC_DCHECK(bitrate_bps);
   estimated_bitrate_bps_ = bitrate_bps;
 }
 
 rtc::Optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime()
     const {
   return alr_started_time_ms_;
 }
 
 }  // namespace webrtc