8a8ebd94b0
When operating on mobile devices, where hardware support is available for the AEC and NS functionality, it is desirable to be able to operate without hardcoded behaviors for the WebRTC AGC and HPF. This CL adds support to allow a field trial to turn these off whenever that is possible. BUG=webrtc:6220, webrtc:6183, webrtc:6181 Review-Url: https://codereview.webrtc.org/2876133002 Cr-Commit-Position: refs/heads/master@{#18226}
70 lines
3.1 KiB
Plaintext
70 lines
3.1 KiB
Plaintext
/*
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* Copyright 2016 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#import "WebRTC/RTCFieldTrials.h"
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#include <memory>
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#import "WebRTC/RTCLogging.h"
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// Adding 'nogncheck' to disable the gn include headers check.
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// We don't want to depend on 'system_wrappers:field_trial_default' because
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// clients should be able to provide their own implementation.
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#include "webrtc/system_wrappers/include/field_trial_default.h" // nogncheck
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NSString * const kRTCFieldTrialAudioSendSideBweKey = @"WebRTC-Audio-SendSideBwe";
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NSString * const kRTCFieldTrialSendSideBweWithOverheadKey = @"WebRTC-SendSideBwe-WithOverhead";
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NSString * const kRTCFieldTrialFlexFec03AdvertisedKey = @"WebRTC-FlexFEC-03-Advertised";
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NSString * const kRTCFieldTrialFlexFec03Key = @"WebRTC-FlexFEC-03";
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NSString * const kRTCFieldTrialImprovedBitrateEstimateKey = @"WebRTC-ImprovedBitrateEstimate";
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NSString * const kRTCFieldTrialMedianSlopeFilterKey = @"WebRTC-BweMedianSlopeFilter";
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NSString * const kRTCFieldTrialTrendlineFilterKey = @"WebRTC-BweTrendlineFilter";
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NSString * const kRTCFieldTrialH264HighProfileKey = @"WebRTC-H264HighProfile";
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NSString * const kRTCFieldTrialMinimizeResamplingOnMobileKey =
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@"WebRTC-Audio-MinimizeResamplingOnMobile";
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NSString * const kRTCFieldTrialEnabledValue = @"Enabled";
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static std::unique_ptr<char[]> gFieldTrialInitString;
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NSString *RTCFieldTrialMedianSlopeFilterValue(
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size_t windowSize, double thresholdGain) {
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NSString *format = @"Enabled-%zu,%lf";
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return [NSString stringWithFormat:format, windowSize, thresholdGain];
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}
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NSString *RTCFieldTrialTrendlineFilterValue(
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size_t windowSize, double smoothingCoeff, double thresholdGain) {
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NSString *format = @"Enabled-%zu,%lf,%lf";
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return [NSString stringWithFormat:format, windowSize, smoothingCoeff, thresholdGain];
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}
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void RTCInitFieldTrialDictionary(NSDictionary<NSString *, NSString *> *fieldTrials) {
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if (!fieldTrials) {
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RTCLogWarning(@"No fieldTrials provided.");
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return;
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}
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// Assemble the keys and values into the field trial string.
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// We don't perform any extra format checking. That should be done by the underlying WebRTC calls.
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NSMutableString *fieldTrialInitString = [NSMutableString string];
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for (NSString *key in fieldTrials) {
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NSString *fieldTrialEntry = [NSString stringWithFormat:@"%@/%@/", key, fieldTrials[key]];
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[fieldTrialInitString appendString:fieldTrialEntry];
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}
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size_t len = fieldTrialInitString.length + 1;
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gFieldTrialInitString.reset(new char[len]);
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if (![fieldTrialInitString getCString:gFieldTrialInitString.get()
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maxLength:len
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encoding:NSUTF8StringEncoding]) {
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RTCLogError(@"Failed to convert field trial string.");
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return;
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}
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webrtc::field_trial::InitFieldTrialsFromString(gFieldTrialInitString.get());
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}
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