71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
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/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/audio_coding/neteq/reorder_optimizer.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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constexpr int kForgetFactor = 32745; // 0.9993 in Q15.
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constexpr int kMsPerLossPercent = 20;
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constexpr int kStartForgetWeight = 1;
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} // namespace
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TEST(ReorderOptimizerTest, OnlyIncreaseDelayForReorderedPackets) {
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ReorderOptimizer reorder_optimizer(kForgetFactor, kMsPerLossPercent,
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kStartForgetWeight);
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EXPECT_FALSE(reorder_optimizer.GetOptimalDelayMs());
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// Delay should not increase for in-order packets.
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reorder_optimizer.Update(60, /*reordered=*/false, 0);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 20);
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reorder_optimizer.Update(100, /*reordered=*/false, 0);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 20);
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reorder_optimizer.Update(80, /*reordered=*/true, 0);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 100);
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}
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TEST(ReorderOptimizerTest, AvoidIncreasingDelayWhenProbabilityIsLow) {
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ReorderOptimizer reorder_optimizer(kForgetFactor, kMsPerLossPercent,
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kStartForgetWeight);
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reorder_optimizer.Update(40, /*reordered=*/true, 0);
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reorder_optimizer.Update(40, /*reordered=*/true, 0);
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reorder_optimizer.Update(40, /*reordered=*/true, 0);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 60);
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// The cost of the delay is too high relative the probability.
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reorder_optimizer.Update(600, /*reordered=*/true, 0);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 60);
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}
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TEST(ReorderOptimizerTest, BaseDelayIsSubtractedFromCost) {
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constexpr int kBaseDelayMs = 200;
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ReorderOptimizer reorder_optimizer(kForgetFactor, kMsPerLossPercent,
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kStartForgetWeight);
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reorder_optimizer.Update(40, /*reordered=*/true, kBaseDelayMs);
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reorder_optimizer.Update(40, /*reordered=*/true, kBaseDelayMs);
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reorder_optimizer.Update(40, /*reordered=*/true, kBaseDelayMs);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 60);
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// The cost of the delay is too high relative the probability.
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reorder_optimizer.Update(600, /*reordered=*/true, kBaseDelayMs);
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EXPECT_EQ(reorder_optimizer.GetOptimalDelayMs(), 620);
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}
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} // namespace webrtc
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