You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
//
|
|
// Copyright (c) 2014 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 WEBRTC_SYSTEM_WRAPPERS_INTERFACE_FIELD_TRIAL_H_
|
|
#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_FIELD_TRIAL_H_
|
|
|
|
#include <string>
|
|
|
|
#include "webrtc/common_types.h"
|
|
|
|
// Field trials allow webrtc clients (such as Chrome) to turn on feature code
|
|
// in binaries out in the field and gather information with that.
|
|
//
|
|
// WebRTC clients MUST provide an implementation of:
|
|
//
|
|
// std::string webrtc::field_trial::FindFullName(const std::string& trial).
|
|
//
|
|
// Or link with a default one provided in:
|
|
//
|
|
// system_wrappers/source/system_wrappers.gyp:field_trial_default
|
|
//
|
|
//
|
|
// They are designed to wire up directly to chrome field trials and to speed up
|
|
// developers by reducing the need to wire APIs to control whether a feature is
|
|
// on/off. E.g. to experiment with a new method that could lead to a different
|
|
// trade-off between CPU/bandwidth:
|
|
//
|
|
// 1 - Develop the feature with default behaviour off:
|
|
//
|
|
// if (FieldTrial::FindFullName("WebRTCExperimenMethod2") == "Enabled")
|
|
// method2();
|
|
// else
|
|
// method1();
|
|
//
|
|
// 2 - Once the changes are rolled to chrome, the new code path can be
|
|
// controlled as normal chrome field trials.
|
|
//
|
|
// 3 - Evaluate the new feature and clean the code paths.
|
|
//
|
|
// Notes:
|
|
// - NOT every feature is a candidate to be controlled by this mechanism as
|
|
// it may require negotation between involved parties (e.g. SDP).
|
|
//
|
|
// TODO(andresp): since chrome --force-fieldtrials does not marks the trial
|
|
// as active it does not gets propaged to renderer process. For now one
|
|
// needs to push a config with start_active:true or run a local finch
|
|
// server.
|
|
//
|
|
// TODO(andresp): find out how to get bots to run tests with trials enabled.
|
|
|
|
namespace webrtc {
|
|
namespace field_trial {
|
|
|
|
// Returns the group name chosen for the named trial, or the empty string
|
|
// if the trial does not exists.
|
|
//
|
|
// Note: To keep things tidy append all the trial names with WebRTC.
|
|
std::string FindFullName(const std::string& name);
|
|
|
|
} // namespace field_trial
|
|
} // namespace webrtc
|
|
|
|
#endif // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_FIELD_TRIAL_H_
|