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/*
* 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/quality_rampup_experiment.h"
#include "test/field_trial.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
class QualityRampupExperimentTest : public ::testing::Test {
protected:
int64_t NowMs() const { return current_ms_; }
int64_t AdvanceMs(int64_t delta_ms) {
current_ms_ += delta_ms;
return current_ms_;
}
int64_t current_ms_ = 2345;
};
TEST_F(QualityRampupExperimentTest, ValuesNotSetByDefault) {
const auto settings = QualityRampupExperiment::ParseSettings();
EXPECT_FALSE(settings.MinPixels());
EXPECT_FALSE(settings.MinDurationMs());
EXPECT_FALSE(settings.MaxBitrateFactor());
}
TEST_F(QualityRampupExperimentTest, ParseMinPixels) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/min_pixels:10000/");
EXPECT_EQ(10000, QualityRampupExperiment::ParseSettings().MinPixels());
}
TEST_F(QualityRampupExperimentTest, ParseMinDuration) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/min_duration_ms:987/");
EXPECT_EQ(987, QualityRampupExperiment::ParseSettings().MinDurationMs());
}
TEST_F(QualityRampupExperimentTest, ParseMaxBitrateFactor) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/max_bitrate_factor:1.23/");
EXPECT_EQ(1.23, QualityRampupExperiment::ParseSettings().MaxBitrateFactor());
}
TEST_F(QualityRampupExperimentTest, ReportsBwHighWhenDurationPassed) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/"
"min_pixels:10000,min_duration_ms:2000/");
auto exp = QualityRampupExperiment::ParseSettings();
EXPECT_EQ(10000, exp.MinPixels());
EXPECT_EQ(2000, exp.MinDurationMs());
const uint32_t kMaxKbps = 800;
exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
const uint32_t kAvailableKbps = kMaxKbps;
EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000 - 1), kAvailableKbps));
EXPECT_TRUE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
}
TEST_F(QualityRampupExperimentTest, UsesMaxSetBitrate) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/"
"min_pixels:10000,min_duration_ms:2000/");
auto exp = QualityRampupExperiment::ParseSettings();
const uint32_t kMaxKbps = 800;
exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps - 1);
EXPECT_FALSE(exp.BwHigh(NowMs(), kMaxKbps - 1));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000), kMaxKbps - 1));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kMaxKbps));
EXPECT_TRUE(exp.BwHigh(AdvanceMs(2000), kMaxKbps));
}
TEST_F(QualityRampupExperimentTest, DoesNotReportBwHighIfBelowMinPixels) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/"
"min_pixels:10000,min_duration_ms:2000/");
auto exp = QualityRampupExperiment::ParseSettings();
const uint32_t kMaxKbps = 800;
exp.SetMaxBitrate(/*pixels*/ 9999, kMaxKbps);
const uint32_t kAvailableKbps = kMaxKbps;
EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000), kAvailableKbps));
}
TEST_F(QualityRampupExperimentTest, ReportsBwHighWithMaxBitrateFactor) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/"
"min_pixels:10000,min_duration_ms:2000,max_bitrate_factor:1.5/");
auto exp = QualityRampupExperiment::ParseSettings();
EXPECT_EQ(10000, exp.MinPixels());
EXPECT_EQ(2000, exp.MinDurationMs());
EXPECT_EQ(1.5, exp.MaxBitrateFactor());
const uint32_t kMaxKbps = 800;
exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
const uint32_t kAvailableKbps = kMaxKbps * 1.5;
EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps - 1));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000), kAvailableKbps - 1));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
EXPECT_TRUE(exp.BwHigh(AdvanceMs(2000), kAvailableKbps));
}
TEST_F(QualityRampupExperimentTest, ReportsBwHigh) {
test::ScopedFieldTrials field_trials(
"WebRTC-Video-QualityRampupSettings/"
"min_pixels:10000,min_duration_ms:2000/");
auto exp = QualityRampupExperiment::ParseSettings();
const uint32_t kMaxKbps = 800;
exp.SetMaxBitrate(/*pixels*/ 10000, kMaxKbps);
const uint32_t kAvailableKbps = kMaxKbps;
EXPECT_FALSE(exp.BwHigh(NowMs(), kAvailableKbps));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000 - 1), kAvailableKbps));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kAvailableKbps - 1)); // Below, reset.
EXPECT_FALSE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
EXPECT_FALSE(exp.BwHigh(AdvanceMs(2000 - 1), kAvailableKbps));
EXPECT_TRUE(exp.BwHigh(AdvanceMs(1), kAvailableKbps));
}
} // namespace
} // namespace webrtc
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