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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "webrtc/modules/pacing/alr_detector.h" | 11 #include "webrtc/modules/pacing/alr_detector.h" |
12 | 12 |
13 #include <string> | 13 #include <string> |
14 | 14 |
| 15 #include "webrtc/logging/rtc_event_log/rtc_event_log.h" |
15 #include "webrtc/rtc_base/checks.h" | 16 #include "webrtc/rtc_base/checks.h" |
16 #include "webrtc/rtc_base/format_macros.h" | 17 #include "webrtc/rtc_base/format_macros.h" |
17 #include "webrtc/rtc_base/logging.h" | 18 #include "webrtc/rtc_base/logging.h" |
18 #include "webrtc/rtc_base/timeutils.h" | 19 #include "webrtc/rtc_base/timeutils.h" |
19 #include "webrtc/system_wrappers/include/field_trial.h" | 20 #include "webrtc/system_wrappers/include/field_trial.h" |
20 | 21 |
21 namespace webrtc { | 22 namespace webrtc { |
22 | 23 |
23 const char AlrDetector::kScreenshareProbingBweExperimentName[] = | 24 const char AlrDetector::kScreenshareProbingBweExperimentName[] = |
24 "WebRTC-ProbingScreenshareBwe"; | 25 "WebRTC-ProbingScreenshareBwe"; |
25 const char AlrDetector::kStrictPacingAndProbingExperimentName[] = | 26 const char AlrDetector::kStrictPacingAndProbingExperimentName[] = |
26 "WebRTC-StrictPacingAndProbing"; | 27 "WebRTC-StrictPacingAndProbing"; |
27 | 28 |
28 AlrDetector::AlrDetector() | 29 AlrDetector::AlrDetector() : AlrDetector(nullptr) {} |
| 30 |
| 31 AlrDetector::AlrDetector(RtcEventLog* event_log) |
29 : bandwidth_usage_percent_(kDefaultAlrBandwidthUsagePercent), | 32 : bandwidth_usage_percent_(kDefaultAlrBandwidthUsagePercent), |
30 alr_start_budget_level_percent_(kDefaultAlrStartBudgetLevelPercent), | 33 alr_start_budget_level_percent_(kDefaultAlrStartBudgetLevelPercent), |
31 alr_stop_budget_level_percent_(kDefaultAlrStopBudgetLevelPercent), | 34 alr_stop_budget_level_percent_(kDefaultAlrStopBudgetLevelPercent), |
32 alr_budget_(0, true) { | 35 alr_budget_(0, true), |
| 36 event_log_(event_log) { |
33 RTC_CHECK( | 37 RTC_CHECK( |
34 field_trial::FindFullName(kStrictPacingAndProbingExperimentName) | 38 field_trial::FindFullName(kStrictPacingAndProbingExperimentName) |
35 .empty() || | 39 .empty() || |
36 field_trial::FindFullName(kScreenshareProbingBweExperimentName).empty()); | 40 field_trial::FindFullName(kScreenshareProbingBweExperimentName).empty()); |
37 rtc::Optional<AlrExperimentSettings> experiment_settings = | 41 rtc::Optional<AlrExperimentSettings> experiment_settings = |
38 ParseAlrSettingsFromFieldTrial(kScreenshareProbingBweExperimentName); | 42 ParseAlrSettingsFromFieldTrial(kScreenshareProbingBweExperimentName); |
39 if (!experiment_settings) { | 43 if (!experiment_settings) { |
40 experiment_settings = | 44 experiment_settings = |
41 ParseAlrSettingsFromFieldTrial(kStrictPacingAndProbingExperimentName); | 45 ParseAlrSettingsFromFieldTrial(kStrictPacingAndProbingExperimentName); |
42 } | 46 } |
43 if (experiment_settings) { | 47 if (experiment_settings) { |
44 alr_stop_budget_level_percent_ = | 48 alr_stop_budget_level_percent_ = |
45 experiment_settings->alr_stop_budget_level_percent; | 49 experiment_settings->alr_stop_budget_level_percent; |
46 alr_start_budget_level_percent_ = | 50 alr_start_budget_level_percent_ = |
47 experiment_settings->alr_start_budget_level_percent; | 51 experiment_settings->alr_start_budget_level_percent; |
48 bandwidth_usage_percent_ = experiment_settings->alr_bandwidth_usage_percent; | 52 bandwidth_usage_percent_ = experiment_settings->alr_bandwidth_usage_percent; |
49 } | 53 } |
50 } | 54 } |
51 | 55 |
52 AlrDetector::~AlrDetector() {} | 56 AlrDetector::~AlrDetector() {} |
53 | 57 |
54 void AlrDetector::OnBytesSent(size_t bytes_sent, int64_t delta_time_ms) { | 58 void AlrDetector::OnBytesSent(size_t bytes_sent, int64_t delta_time_ms) { |
55 alr_budget_.UseBudget(bytes_sent); | 59 alr_budget_.UseBudget(bytes_sent); |
56 alr_budget_.IncreaseBudget(delta_time_ms); | 60 alr_budget_.IncreaseBudget(delta_time_ms); |
57 | |
58 if (alr_budget_.budget_level_percent() > alr_start_budget_level_percent_ && | 61 if (alr_budget_.budget_level_percent() > alr_start_budget_level_percent_ && |
59 !alr_started_time_ms_) { | 62 !alr_started_time_ms_) { |
60 alr_started_time_ms_.emplace(rtc::TimeMillis()); | 63 alr_started_time_ms_.emplace(rtc::TimeMillis()); |
61 } else if (alr_budget_.budget_level_percent() < | 64 } else if (alr_budget_.budget_level_percent() < |
62 alr_stop_budget_level_percent_ && | 65 alr_stop_budget_level_percent_ && |
63 alr_started_time_ms_) { | 66 alr_started_time_ms_) { |
64 alr_started_time_ms_.reset(); | 67 alr_started_time_ms_.reset(); |
65 } | 68 } |
| 69 int usage = 100 - alr_budget_.budget_level_percent(); |
| 70 uint32_t usage_kbps = usage * alr_budget_.target_rate_kbps() / 200; |
| 71 usage_kbps *= 100.0 / bandwidth_usage_percent_; |
| 72 if (event_log_) |
| 73 event_log_->LogAlrState(alr_started_time_ms_.has_value(), |
| 74 usage_kbps * 1000); |
66 } | 75 } |
67 | 76 |
68 void AlrDetector::SetEstimatedBitrate(int bitrate_bps) { | 77 void AlrDetector::SetEstimatedBitrate(int bitrate_bps) { |
69 RTC_DCHECK(bitrate_bps); | 78 RTC_DCHECK(bitrate_bps); |
70 alr_budget_.set_target_rate_kbps(bitrate_bps * bandwidth_usage_percent_ / | 79 alr_budget_.set_target_rate_kbps(bitrate_bps * bandwidth_usage_percent_ / |
71 (1000 * 100)); | 80 (1000 * 100)); |
72 } | 81 } |
73 | 82 |
74 rtc::Optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime() | 83 rtc::Optional<int64_t> AlrDetector::GetApplicationLimitedRegionStartTime() |
75 const { | 84 const { |
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108 << ", ALR end budget level percent: " | 117 << ", ALR end budget level percent: " |
109 << settings.alr_stop_budget_level_percent; | 118 << settings.alr_stop_budget_level_percent; |
110 } else { | 119 } else { |
111 LOG(LS_INFO) << "Failed to parse ALR experiment: " << experiment_name; | 120 LOG(LS_INFO) << "Failed to parse ALR experiment: " << experiment_name; |
112 } | 121 } |
113 | 122 |
114 return ret; | 123 return ret; |
115 } | 124 } |
116 | 125 |
117 } // namespace webrtc | 126 } // namespace webrtc |
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