1 /*
2 * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
3 *
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
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "rtc_base/experiments/quality_scaler_settings.h"
12
13 #include "api/transport/field_trial_based_config.h"
14 #include "rtc_base/logging.h"
15
16 namespace webrtc {
17 namespace {
18 const int kMinFrames = 10;
19 const double kMinScaleFactor = 0.01;
20 } // namespace
21
QualityScalerSettings(const WebRtcKeyValueConfig * const key_value_config)22 QualityScalerSettings::QualityScalerSettings(
23 const WebRtcKeyValueConfig* const key_value_config)
24 : min_frames_("min_frames"),
25 initial_scale_factor_("initial_scale_factor"),
26 scale_factor_("scale_factor"),
27 initial_bitrate_interval_ms_("initial_bitrate_interval_ms"),
28 initial_bitrate_factor_("initial_bitrate_factor") {
29 ParseFieldTrial(
30 {&min_frames_, &initial_scale_factor_, &scale_factor_,
31 &initial_bitrate_interval_ms_, &initial_bitrate_factor_},
32 key_value_config->Lookup("WebRTC-Video-QualityScalerSettings"));
33 }
34
ParseFromFieldTrials()35 QualityScalerSettings QualityScalerSettings::ParseFromFieldTrials() {
36 FieldTrialBasedConfig field_trial_config;
37 return QualityScalerSettings(&field_trial_config);
38 }
39
MinFrames() const40 absl::optional<int> QualityScalerSettings::MinFrames() const {
41 if (min_frames_ && min_frames_.Value() < kMinFrames) {
42 RTC_LOG(LS_WARNING) << "Unsupported min_frames value, ignored.";
43 return absl::nullopt;
44 }
45 return min_frames_.GetOptional();
46 }
47
InitialScaleFactor() const48 absl::optional<double> QualityScalerSettings::InitialScaleFactor() const {
49 if (initial_scale_factor_ &&
50 initial_scale_factor_.Value() < kMinScaleFactor) {
51 RTC_LOG(LS_WARNING) << "Unsupported initial_scale_factor value, ignored.";
52 return absl::nullopt;
53 }
54 return initial_scale_factor_.GetOptional();
55 }
56
ScaleFactor() const57 absl::optional<double> QualityScalerSettings::ScaleFactor() const {
58 if (scale_factor_ && scale_factor_.Value() < kMinScaleFactor) {
59 RTC_LOG(LS_WARNING) << "Unsupported scale_factor value, ignored.";
60 return absl::nullopt;
61 }
62 return scale_factor_.GetOptional();
63 }
64
InitialBitrateIntervalMs() const65 absl::optional<int> QualityScalerSettings::InitialBitrateIntervalMs() const {
66 if (initial_bitrate_interval_ms_ &&
67 initial_bitrate_interval_ms_.Value() < 0) {
68 RTC_LOG(LS_WARNING) << "Unsupported bitrate_interval value, ignored.";
69 return absl::nullopt;
70 }
71 return initial_bitrate_interval_ms_.GetOptional();
72 }
73
InitialBitrateFactor() const74 absl::optional<double> QualityScalerSettings::InitialBitrateFactor() const {
75 if (initial_bitrate_factor_ &&
76 initial_bitrate_factor_.Value() < kMinScaleFactor) {
77 RTC_LOG(LS_WARNING) << "Unsupported initial_bitrate_factor value, ignored.";
78 return absl::nullopt;
79 }
80 return initial_bitrate_factor_.GetOptional();
81 }
82
83 } // namespace webrtc
84