webrtc_features.cc | Explore in Territory

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/webrtc/webrtc_features.h"

#include "base/command_line.h"
#include "base/metrics/field_trial_params.h"
#include "build/build_config.h"
#include "third_party/webrtc/modules/audio_processing/include/audio_processing.h"

namespace features {

// When enabled we will tell WebRTC that we want to use the 0Hz mode of the
// DirectX and GDI based DesktopCapturers in combination with sharing the screen
// or a separate window. In this mode, only frames with new content will be sent
// to the client leading to to 0fps for a static source. A special flag called
// kWebRtcAllowWgcZeroHz is used to specify the support when using the WGC
// capture API.
// This flag has no effect if kWebRtcAllowWgcDesktopCapturer is enabled. Use
// kWebRtcAllowWgcZeroHz for WGC.
BASE_FEATURE(…);

// When enabled we will tell WebRTC that we want to use the
// Windows.Graphics.Capture API based screen capturer, if it is available.
BASE_FEATURE(…);

// When enabled we will tell WebRTC that we want to use the
// Windows.Graphics.Capture API based window capturer, if it is available.
BASE_FEATURE(…);

// When enabled we will tell WebRTC that we want to use the 0Hz mode of the
// Windows.Graphics.Capture API based {Screen/Window} capturer, if the WGC
// capturer is available and enabled. In this mode, only frames with new content
// will be sent to the client leading to to 0fps for a static {Screen/Window}
// source.
// This flag only has an effect if kWebRtcAllowWgcScreenCapturer is enabled.
BASE_FEATURE(…);
// This flag only has an effect if kWebRtcAllowWgcWindowCapturer is enabled.
BASE_FEATURE(…);

// TODO(crbug.com/40872787): Deactivate the flag gradually before deleting it.
// When disabled, any WebRTC Audio Processing Module input volume recommendation
// is ignored and no adjustment takes place.
BASE_FEATURE(…);

// When enabled, overrides the Audio Processing Module parameter that controls
// how multi-channel capture audio is downmixed to mono (when downmixing is
// needed).
BASE_FEATURE(…);

// When enabled, the Audio Processing Module is used to determine whether the
// playout reference is needed. Otherwise the decision is based on
// `media::AudioProcessingSettings`.
BASE_FEATURE(…);

// When enabled, allow H.265 codec to be used for sending WebRTC streams.
// Platform hardware H.265 encoder needs to be supported and enabled in order to
// negotiate usage of H.265 in SDP in the direction of sending.
BASE_FEATURE(…);

// When enabled, allow H.265 codec to be used for receiving WebRTC streams.
// Platform hardware H.265 decoder needs to be supported and enabled in order to
// negotiate usage of H.265 in SDP in the direction of receiving.
BASE_FEATURE(…);

#if BUILDFLAG(IS_ANDROID)
// Kill-switch for using 48 kHz as sample rate for Audio Processing Module
// processing on Android. When enabled, enforces a 16 kHz sample rate for audio
// processing on Android.
BASE_FEATURE(kWebRtcApm48kHzSampleRateOnAndroidKillSwitch,
             "WebRtcApm48kHzSampleRateOnAndroidKillSwitch",
             base::FEATURE_DISABLED_BY_DEFAULT);
#endif

}  // namespace features
chromium/media/webrtc/webrtc_features.cc
