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1 /* | 1 /* |
2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 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 #import "WebRTC/RTCFieldTrials.h" | 11 #import "WebRTC/RTCFieldTrials.h" |
12 | 12 |
13 #include <memory> | 13 #include <memory> |
14 | 14 |
15 #import "WebRTC/RTCLogging.h" | 15 #import "WebRTC/RTCLogging.h" |
16 | 16 |
17 #include "webrtc/system_wrappers/include/field_trial_default.h" | 17 #include "webrtc/system_wrappers/include/field_trial_default.h" |
18 | 18 |
19 static NSString * const kRTCEnableImprovedBitrateEstimateString = | 19 NSString * const kRTCFieldTrialAudioSendSideBweKey = @"WebRTC-Audio-SendSideBwe"
; |
20 @"WebRTC-ImprovedBitrateEstimate/Enabled/"; | 20 NSString * const kRTCFieldTrialFlexFec03Key = @"WebRTC-FlexFEC-03"; |
21 static NSString * const kRTCEnableAudioSendSideBweString = | 21 NSString * const kRTCFieldTrialImprovedBitrateEstimateKey = @"WebRTC-ImprovedBit
rateEstimate"; |
22 @"WebRTC-Audio-SendSideBwe/Enabled/"; | 22 NSString * const kRTCFieldTrialTrendlineFilterKey = @"WebRTC-BweTrendlineFilter"
; |
23 static NSString * const kRTCEnableFlexFec03String = | 23 NSString * const kRTCFieldTrialEnabledValue = @"Enabled"; |
24 @"WebRTC-FlexFEC-03/Enabled/"; | 24 |
25 static std::unique_ptr<char[]> gFieldTrialInitString; | 25 static std::unique_ptr<char[]> gFieldTrialInitString; |
26 | 26 |
27 void RTCInitFieldTrials(RTCFieldTrialOptions options) { | 27 NSString *RTCFieldTrialTrendlineFilterValue( |
| 28 size_t windowSize, double smoothingCoeff, double thresholdGain) { |
| 29 NSString *format = @"Enabled-%zu,%lf,%lf"; |
| 30 return [NSString stringWithFormat:format, windowSize, smoothingCoeff, threshol
dGain]; |
| 31 } |
| 32 |
| 33 void RTCInitFieldTrialDictionary(NSDictionary<NSString *, NSString *> *fieldTria
ls) { |
| 34 if (!fieldTrials) { |
| 35 RTCLogWarning(@"No fieldTrials provided."); |
| 36 return; |
| 37 } |
| 38 // Assemble the keys and values into the field trial string. |
| 39 // We don't perform any extra format checking. That should be done by the unde
rlying WebRTC calls. |
28 NSMutableString *fieldTrialInitString = [NSMutableString string]; | 40 NSMutableString *fieldTrialInitString = [NSMutableString string]; |
29 if (options & RTCFieldTrialOptionsImprovedBitrateEstimate) { | 41 for (NSString *key in fieldTrials) { |
30 [fieldTrialInitString appendString:kRTCEnableImprovedBitrateEstimateString]; | 42 NSString *fieldTrialEntry = [NSString stringWithFormat:@"%@/%@/", key, field
Trials[key]]; |
31 } | 43 [fieldTrialInitString appendString:fieldTrialEntry]; |
32 if (options & RTCFieldTrialOptionsAudioSendSideBwe) { | |
33 [fieldTrialInitString appendString:kRTCEnableAudioSendSideBweString]; | |
34 } | |
35 if (options & RTCFieldTrialOptionsFlexFec03) { | |
36 [fieldTrialInitString appendString:kRTCEnableFlexFec03String]; | |
37 } | 44 } |
38 size_t len = fieldTrialInitString.length + 1; | 45 size_t len = fieldTrialInitString.length + 1; |
39 gFieldTrialInitString.reset(new char[len]); | 46 gFieldTrialInitString.reset(new char[len]); |
40 if (![fieldTrialInitString getCString:gFieldTrialInitString.get() | 47 if (![fieldTrialInitString getCString:gFieldTrialInitString.get() |
41 maxLength:len | 48 maxLength:len |
42 encoding:NSUTF8StringEncoding]) { | 49 encoding:NSUTF8StringEncoding]) { |
43 RTCLogError(@"Failed to convert field trial string."); | 50 RTCLogError(@"Failed to convert field trial string."); |
44 return; | 51 return; |
45 } | 52 } |
46 webrtc::field_trial::InitFieldTrialsFromString(gFieldTrialInitString.get()); | 53 webrtc::field_trial::InitFieldTrialsFromString(gFieldTrialInitString.get()); |
47 } | 54 } |
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