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Diffstat (limited to 'webrtc/modules/video_coding/main/source/jitter_estimator_tests.cc')
-rw-r--r-- | webrtc/modules/video_coding/main/source/jitter_estimator_tests.cc | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/webrtc/modules/video_coding/main/source/jitter_estimator_tests.cc b/webrtc/modules/video_coding/main/source/jitter_estimator_tests.cc deleted file mode 100644 index c69c4bcdad..0000000000 --- a/webrtc/modules/video_coding/main/source/jitter_estimator_tests.cc +++ /dev/null @@ -1,160 +0,0 @@ -/* 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. - */ - -#include "webrtc/modules/video_coding/main/source/jitter_estimator.h" - -#include "testing/gtest/include/gtest/gtest.h" -#include "webrtc/system_wrappers/include/clock.h" - -namespace webrtc { - -class TestEstimator : public VCMJitterEstimator { - public: - explicit TestEstimator(bool exp_enabled) - : VCMJitterEstimator(&fake_clock_, 0, 0), - fake_clock_(0), - exp_enabled_(exp_enabled) {} - - virtual bool LowRateExperimentEnabled() { return exp_enabled_; } - - void AdvanceClock(int64_t microseconds) { - fake_clock_.AdvanceTimeMicroseconds(microseconds); - } - - private: - SimulatedClock fake_clock_; - const bool exp_enabled_; -}; - -class TestVCMJitterEstimator : public ::testing::Test { - protected: - TestVCMJitterEstimator() - : regular_estimator_(false), low_rate_estimator_(true) {} - - virtual void SetUp() { regular_estimator_.Reset(); } - - TestEstimator regular_estimator_; - TestEstimator low_rate_estimator_; -}; - -// Generates some simple test data in the form of a sawtooth wave. -class ValueGenerator { - public: - ValueGenerator(int32_t amplitude) : amplitude_(amplitude), counter_(0) {} - virtual ~ValueGenerator() {} - - int64_t Delay() { return ((counter_ % 11) - 5) * amplitude_; } - - uint32_t FrameSize() { return 1000 + Delay(); } - - void Advance() { ++counter_; } - - private: - const int32_t amplitude_; - int64_t counter_; -}; - -// 5 fps, disable jitter delay altogether. -TEST_F(TestVCMJitterEstimator, TestLowRate) { - ValueGenerator gen(10); - uint64_t time_delta = 1000000 / 5; - for (int i = 0; i < 60; ++i) { - regular_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - regular_estimator_.AdvanceClock(time_delta); - low_rate_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - low_rate_estimator_.AdvanceClock(time_delta); - EXPECT_GT(regular_estimator_.GetJitterEstimate(0), 0); - if (i > 2) - EXPECT_EQ(low_rate_estimator_.GetJitterEstimate(0), 0); - gen.Advance(); - } -} - -// 8 fps, steady state estimate should be in interpolated interval between 0 -// and value of previous method. -TEST_F(TestVCMJitterEstimator, TestMidRate) { - ValueGenerator gen(10); - uint64_t time_delta = 1000000 / 8; - for (int i = 0; i < 60; ++i) { - regular_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - regular_estimator_.AdvanceClock(time_delta); - low_rate_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - low_rate_estimator_.AdvanceClock(time_delta); - EXPECT_GT(regular_estimator_.GetJitterEstimate(0), 0); - EXPECT_GT(low_rate_estimator_.GetJitterEstimate(0), 0); - EXPECT_GE(regular_estimator_.GetJitterEstimate(0), - low_rate_estimator_.GetJitterEstimate(0)); - gen.Advance(); - } -} - -// 30 fps, steady state estimate should be same as previous method. -TEST_F(TestVCMJitterEstimator, TestHighRate) { - ValueGenerator gen(10); - uint64_t time_delta = 1000000 / 30; - for (int i = 0; i < 60; ++i) { - regular_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - regular_estimator_.AdvanceClock(time_delta); - low_rate_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - low_rate_estimator_.AdvanceClock(time_delta); - EXPECT_EQ(regular_estimator_.GetJitterEstimate(0), - low_rate_estimator_.GetJitterEstimate(0)); - gen.Advance(); - } -} - -// 10 fps, high jitter then low jitter. Low rate estimator should converge -// faster to low noise estimate. -TEST_F(TestVCMJitterEstimator, TestConvergence) { - // Reach a steady state with high noise. - ValueGenerator gen(50); - uint64_t time_delta = 1000000 / 10; - for (int i = 0; i < 100; ++i) { - regular_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - regular_estimator_.AdvanceClock(time_delta * 2); - low_rate_estimator_.UpdateEstimate(gen.Delay(), gen.FrameSize()); - low_rate_estimator_.AdvanceClock(time_delta * 2); - gen.Advance(); - } - - int threshold = regular_estimator_.GetJitterEstimate(0) / 2; - - // New generator with zero noise. - ValueGenerator low_gen(0); - int regular_iterations = 0; - int low_rate_iterations = 0; - for (int i = 0; i < 500; ++i) { - if (regular_iterations == 0) { - regular_estimator_.UpdateEstimate(low_gen.Delay(), low_gen.FrameSize()); - regular_estimator_.AdvanceClock(time_delta); - if (regular_estimator_.GetJitterEstimate(0) < threshold) { - regular_iterations = i; - } - } - - if (low_rate_iterations == 0) { - low_rate_estimator_.UpdateEstimate(low_gen.Delay(), low_gen.FrameSize()); - low_rate_estimator_.AdvanceClock(time_delta); - if (low_rate_estimator_.GetJitterEstimate(0) < threshold) { - low_rate_iterations = i; - } - } - - if (regular_iterations != 0 && low_rate_iterations != 0) { - break; - } - - gen.Advance(); - } - - EXPECT_NE(regular_iterations, 0); - EXPECT_NE(low_rate_iterations, 0); - EXPECT_LE(low_rate_iterations, regular_iterations); -} -} |