mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 13:50:40 +01:00
7ca375c8ca
The overshoot detector uses a simple pacer model to determine an estimate of how much the encoder is overusing the target bitrate. This utilization factor can then be adjuster for when configuring the actual target bitrate. Spatial layers (simulcast streams) are adjusted separately. Temporal layers are measured separately, but are combined into a single utilization factor per spatial layer. Bug: webrtc:10155 Change-Id: I8ea58dc6c4871e880553d7c22202f11cb2feb216 Reviewed-on: https://webrtc-review.googlesource.com/c/114886 Commit-Queue: Erik Språng <sprang@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26573}
143 lines
5.4 KiB
C++
143 lines
5.4 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include "rtc_base/experiments/rate_control_settings.h"
|
|
|
|
#include "api/video_codecs/video_codec.h"
|
|
#include "api/video_codecs/video_encoder_config.h"
|
|
#include "test/field_trial.h"
|
|
#include "test/gtest.h"
|
|
|
|
namespace webrtc {
|
|
|
|
namespace {
|
|
|
|
TEST(RateControlSettingsTest, CongestionWindow) {
|
|
EXPECT_FALSE(
|
|
RateControlSettings::ParseFromFieldTrials().UseCongestionWindow());
|
|
|
|
test::ScopedFieldTrials field_trials("WebRTC-VideoRateControl/cwnd:100/");
|
|
const RateControlSettings settings_after =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
EXPECT_TRUE(settings_after.UseCongestionWindow());
|
|
EXPECT_EQ(settings_after.GetCongestionWindowAdditionalTimeMs(), 100);
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, CongestionWindowPushback) {
|
|
EXPECT_FALSE(RateControlSettings::ParseFromFieldTrials()
|
|
.UseCongestionWindowPushback());
|
|
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/cwnd:100,cwnd_pushback:100000/");
|
|
const RateControlSettings settings_after =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
EXPECT_TRUE(settings_after.UseCongestionWindowPushback());
|
|
EXPECT_EQ(settings_after.CongestionWindowMinPushbackTargetBitrateBps(),
|
|
100000u);
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, PacingFactor) {
|
|
EXPECT_FALSE(RateControlSettings::ParseFromFieldTrials().GetPacingFactor());
|
|
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/pacing_factor:1.2/");
|
|
const RateControlSettings settings_after =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
// Need to explicitly dereference the absl::optional
|
|
// for the EXPECT_DOUBLE_EQ to compile.
|
|
ASSERT_TRUE(settings_after.GetPacingFactor());
|
|
EXPECT_DOUBLE_EQ(*settings_after.GetPacingFactor(), 1.2);
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, AlrProbing) {
|
|
EXPECT_FALSE(RateControlSettings::ParseFromFieldTrials().UseAlrProbing());
|
|
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/alr_probing:1/");
|
|
EXPECT_TRUE(RateControlSettings::ParseFromFieldTrials().UseAlrProbing());
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, LibvpxTrustedRateController) {
|
|
const RateControlSettings settings_before =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
EXPECT_FALSE(settings_before.LibvpxVp8TrustedRateController());
|
|
EXPECT_FALSE(settings_before.LibvpxVp9TrustedRateController());
|
|
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/trust_vp8:1,trust_vp9:1/");
|
|
const RateControlSettings settings_after =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
EXPECT_TRUE(settings_after.LibvpxVp8TrustedRateController());
|
|
EXPECT_TRUE(settings_after.LibvpxVp9TrustedRateController());
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, GetSimulcastHysteresisFactor) {
|
|
const RateControlSettings settings_before =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
EXPECT_DOUBLE_EQ(settings_before.GetSimulcastHysteresisFactor(
|
|
VideoCodecMode::kRealtimeVideo),
|
|
1.0);
|
|
EXPECT_DOUBLE_EQ(settings_before.GetSimulcastHysteresisFactor(
|
|
VideoEncoderConfig::ContentType::kRealtimeVideo),
|
|
1.0);
|
|
EXPECT_DOUBLE_EQ(settings_before.GetSimulcastHysteresisFactor(
|
|
VideoCodecMode::kScreensharing),
|
|
1.35);
|
|
EXPECT_DOUBLE_EQ(settings_before.GetSimulcastHysteresisFactor(
|
|
VideoEncoderConfig::ContentType::kScreen),
|
|
1.35);
|
|
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/"
|
|
"video_hysteresis:1.2,screenshare_hysteresis:1.4/");
|
|
const RateControlSettings settings_after =
|
|
RateControlSettings::ParseFromFieldTrials();
|
|
|
|
EXPECT_DOUBLE_EQ(settings_after.GetSimulcastHysteresisFactor(
|
|
VideoCodecMode::kRealtimeVideo),
|
|
1.2);
|
|
EXPECT_DOUBLE_EQ(settings_after.GetSimulcastHysteresisFactor(
|
|
VideoEncoderConfig::ContentType::kRealtimeVideo),
|
|
1.2);
|
|
EXPECT_DOUBLE_EQ(settings_after.GetSimulcastHysteresisFactor(
|
|
VideoCodecMode::kScreensharing),
|
|
1.4);
|
|
EXPECT_DOUBLE_EQ(settings_after.GetSimulcastHysteresisFactor(
|
|
VideoEncoderConfig::ContentType::kScreen),
|
|
1.4);
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, TriggerProbeOnMaxAllocatedBitrateChange) {
|
|
EXPECT_TRUE(RateControlSettings::ParseFromFieldTrials()
|
|
.TriggerProbeOnMaxAllocatedBitrateChange());
|
|
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/probe_max_allocation:0/");
|
|
EXPECT_FALSE(RateControlSettings::ParseFromFieldTrials()
|
|
.TriggerProbeOnMaxAllocatedBitrateChange());
|
|
}
|
|
|
|
TEST(RateControlSettingsTest, UseEncoderBitrateAdjuster) {
|
|
// Should be off by default.
|
|
EXPECT_FALSE(
|
|
RateControlSettings::ParseFromFieldTrials().UseEncoderBitrateAdjuster());
|
|
|
|
{
|
|
// Can be turned on via field trial.
|
|
test::ScopedFieldTrials field_trials(
|
|
"WebRTC-VideoRateControl/bitrate_adjuster:true/");
|
|
EXPECT_TRUE(RateControlSettings::ParseFromFieldTrials()
|
|
.UseEncoderBitrateAdjuster());
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
} // namespace webrtc
|