| /* |
| * Copyright 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. |
| */ |
| |
| #import "RTCFieldTrials.h" |
| |
| #include <memory> |
| |
| #import "base/RTCLogging.h" |
| |
| #include "system_wrappers/include/field_trial.h" |
| |
| NSString * const kRTCFieldTrialAudioForceABWENoTWCCKey = @"WebRTC-Audio-ABWENoTWCC"; |
| NSString * const kRTCFieldTrialSendSideBweWithOverheadKey = @"WebRTC-SendSideBwe-WithOverhead"; |
| NSString * const kRTCFieldTrialFlexFec03AdvertisedKey = @"WebRTC-FlexFEC-03-Advertised"; |
| NSString * const kRTCFieldTrialFlexFec03Key = @"WebRTC-FlexFEC-03"; |
| NSString * const kRTCFieldTrialH264HighProfileKey = @"WebRTC-H264HighProfile"; |
| NSString * const kRTCFieldTrialMinimizeResamplingOnMobileKey = |
| @"WebRTC-Audio-MinimizeResamplingOnMobile"; |
| NSString *const kRTCFieldTrialUseNWPathMonitor = @"WebRTC-Network-UseNWPathMonitor"; |
| NSString * const kRTCFieldTrialEnabledValue = @"Enabled"; |
| |
| // InitFieldTrialsFromString stores the char*, so the char array must outlive |
| // the application. |
| static char *gFieldTrialInitString = nullptr; |
| |
| void RTCInitFieldTrialDictionary(NSDictionary<NSString *, NSString *> *fieldTrials) { |
| if (!fieldTrials) { |
| RTCLogWarning(@"No fieldTrials provided."); |
| return; |
| } |
| // Assemble the keys and values into the field trial string. |
| // We don't perform any extra format checking. That should be done by the underlying WebRTC calls. |
| NSMutableString *fieldTrialInitString = [NSMutableString string]; |
| for (NSString *key in fieldTrials) { |
| NSString *fieldTrialEntry = [NSString stringWithFormat:@"%@/%@/", key, fieldTrials[key]]; |
| [fieldTrialInitString appendString:fieldTrialEntry]; |
| } |
| size_t len = fieldTrialInitString.length + 1; |
| if (gFieldTrialInitString != nullptr) { |
| delete[] gFieldTrialInitString; |
| } |
| gFieldTrialInitString = new char[len]; |
| if (![fieldTrialInitString getCString:gFieldTrialInitString |
| maxLength:len |
| encoding:NSUTF8StringEncoding]) { |
| RTCLogError(@"Failed to convert field trial string."); |
| return; |
| } |
| webrtc::field_trial::InitFieldTrialsFromString(gFieldTrialInitString); |
| } |