blob: 854bc7caaf4f288686eb5699abb680279c13de47 [file] [log] [blame]
* 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 "WebRTC/RTCFieldTrials.h"
#include <memory>
#import "WebRTC/RTCLogging.h"
// Adding 'nogncheck' to disable the gn include headers check.
// We don't want to depend on 'system_wrappers:field_trial_default' because
// clients should be able to provide their own implementation.
#include "webrtc/system_wrappers/include/field_trial_default.h" // nogncheck
NSString * const kRTCFieldTrialAudioSendSideBweKey = @"WebRTC-Audio-SendSideBwe";
NSString * const kRTCFieldTrialSendSideBweWithOverheadKey = @"WebRTC-SendSideBwe-WithOverhead";
NSString * const kRTCFieldTrialFlexFec03AdvertisedKey = @"WebRTC-FlexFEC-03-Advertised";
NSString * const kRTCFieldTrialFlexFec03Key = @"WebRTC-FlexFEC-03";
NSString * const kRTCFieldTrialImprovedBitrateEstimateKey = @"WebRTC-ImprovedBitrateEstimate";
NSString * const kRTCFieldTrialMedianSlopeFilterKey = @"WebRTC-BweMedianSlopeFilter";
NSString * const kRTCFieldTrialTrendlineFilterKey = @"WebRTC-BweTrendlineFilter";
NSString * const kRTCFieldTrialH264HighProfileKey = @"WebRTC-H264HighProfile";
NSString * const kRTCFieldTrialMinimizeResamplingOnMobileKey =
NSString * const kRTCFieldTrialEnabledValue = @"Enabled";
static std::unique_ptr<char[]> gFieldTrialInitString;
NSString *RTCFieldTrialMedianSlopeFilterValue(
size_t windowSize, double thresholdGain) {
NSString *format = @"Enabled-%zu,%lf";
return [NSString stringWithFormat:format, windowSize, thresholdGain];
NSString *RTCFieldTrialTrendlineFilterValue(
size_t windowSize, double smoothingCoeff, double thresholdGain) {
NSString *format = @"Enabled-%zu,%lf,%lf";
return [NSString stringWithFormat:format, windowSize, smoothingCoeff, thresholdGain];
void RTCInitFieldTrialDictionary(NSDictionary<NSString *, NSString *> *fieldTrials) {
if (!fieldTrials) {
RTCLogWarning(@"No fieldTrials provided.");
// 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;
gFieldTrialInitString.reset(new char[len]);
if (![fieldTrialInitString getCString:gFieldTrialInitString.get()
encoding:NSUTF8StringEncoding]) {
RTCLogError(@"Failed to convert field trial string.");