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Diffstat (limited to 'third_party/libwebrtc/api/field_trials_view.h')
-rw-r--r-- | third_party/libwebrtc/api/field_trials_view.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/field_trials_view.h b/third_party/libwebrtc/api/field_trials_view.h new file mode 100644 index 0000000000..d8df84574d --- /dev/null +++ b/third_party/libwebrtc/api/field_trials_view.h @@ -0,0 +1,46 @@ +/* + * Copyright 2019 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. + */ +#ifndef API_FIELD_TRIALS_VIEW_H_ +#define API_FIELD_TRIALS_VIEW_H_ + +#include <string> + +#include "absl/strings/match.h" +#include "absl/strings/string_view.h" +#include "rtc_base/system/rtc_export.h" + +namespace webrtc { + +// An interface that provides the means to access field trials. +// +// Note that there are no guarantess that the meaning of a particular key-value +// mapping will be preserved over time and no announcements will be made if they +// are changed. It's up to the library user to ensure that the behavior does not +// break. +class RTC_EXPORT FieldTrialsView { + public: + virtual ~FieldTrialsView() = default; + + // Returns the configured value for `key` or an empty string if the field + // trial isn't configured. + virtual std::string Lookup(absl::string_view key) const = 0; + + bool IsEnabled(absl::string_view key) const { + return absl::StartsWith(Lookup(key), "Enabled"); + } + + bool IsDisabled(absl::string_view key) const { + return absl::StartsWith(Lookup(key), "Disabled"); + } +}; + +} // namespace webrtc + +#endif // API_FIELD_TRIALS_VIEW_H_ |