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/*
* Copyright (c) 2021 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 "modules/audio_coding/neteq/underrun_optimizer.h"
#include <optional>
#include "api/neteq/tick_timer.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
constexpr int kDefaultHistogramQuantile = 1020054733; // 0.95 in Q30.
constexpr int kForgetFactor = 32745; // 0.9993 in Q15.
} // namespace
TEST(UnderrunOptimizerTest, ResamplePacketDelays) {
TickTimer tick_timer;
constexpr int kResampleIntervalMs = 500;
UnderrunOptimizer underrun_optimizer(&tick_timer, kDefaultHistogramQuantile,
kForgetFactor, std::nullopt,
kResampleIntervalMs);
// The histogram should be updated once with the maximum delay observed for
// the following sequence of updates.
for (int i = 0; i < 500; i += 20) {
underrun_optimizer.Update(i);
EXPECT_FALSE(underrun_optimizer.GetOptimalDelayMs());
}
tick_timer.Increment(kResampleIntervalMs / tick_timer.ms_per_tick() + 1);
underrun_optimizer.Update(0);
EXPECT_EQ(underrun_optimizer.GetOptimalDelayMs(), 500);
}
} // namespace webrtc
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