1 /* 2 * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "modules/audio_coding/neteq/underrun_optimizer.h" 12 13 #include "test/gtest.h" 14 15 namespace webrtc { 16 17 namespace { 18 19 constexpr int kDefaultHistogramQuantile = 1020054733; // 0.95 in Q30. 20 constexpr int kForgetFactor = 32745; // 0.9993 in Q15. 21 22 } // namespace 23 TEST(UnderrunOptimizerTest,ResamplePacketDelays)24TEST(UnderrunOptimizerTest, ResamplePacketDelays) { 25 TickTimer tick_timer; 26 constexpr int kResampleIntervalMs = 500; 27 UnderrunOptimizer underrun_optimizer(&tick_timer, kDefaultHistogramQuantile, 28 kForgetFactor, absl::nullopt, 29 kResampleIntervalMs); 30 31 // The histogram should be updated once with the maximum delay observed for 32 // the following sequence of updates. 33 for (int i = 0; i < 500; i += 20) { 34 underrun_optimizer.Update(i); 35 EXPECT_FALSE(underrun_optimizer.GetOptimalDelayMs()); 36 } 37 tick_timer.Increment(kResampleIntervalMs / tick_timer.ms_per_tick() + 1); 38 underrun_optimizer.Update(0); 39 EXPECT_EQ(underrun_optimizer.GetOptimalDelayMs(), 500); 40 } 41 42 } // namespace webrtc 43