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74158ff761
Split out `RelativeArrivalDelayTracker` and `DelayOptimizer` logic. This is in preparation for adding another `DelayOptimizer` specialized in handling reordered packets. Bug: webrtc:10178 Change-Id: Id3c1746d91980b171fa524f9b2b71cf11fc75f64 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/231224 Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org> Reviewed-by: Ivo Creusen <ivoc@webrtc.org> Cr-Commit-Position: refs/heads/main@{#34938}
71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
/*
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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/underrun_optimizer.h"
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#include <algorithm>
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namespace webrtc {
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namespace {
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constexpr int kDelayBuckets = 100;
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constexpr int kBucketSizeMs = 20;
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} // namespace
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UnderrunOptimizer::UnderrunOptimizer(const TickTimer* tick_timer,
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int histogram_quantile,
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int forget_factor,
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absl::optional<int> start_forget_weight,
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absl::optional<int> resample_interval_ms)
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: tick_timer_(tick_timer),
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histogram_(kDelayBuckets, forget_factor, start_forget_weight),
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histogram_quantile_(histogram_quantile),
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resample_interval_ms_(resample_interval_ms) {}
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void UnderrunOptimizer::Update(int relative_delay_ms) {
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absl::optional<int> histogram_update;
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if (resample_interval_ms_) {
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if (!resample_stopwatch_) {
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resample_stopwatch_ = tick_timer_->GetNewStopwatch();
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}
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if (static_cast<int>(resample_stopwatch_->ElapsedMs()) >
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*resample_interval_ms_) {
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histogram_update = max_delay_in_interval_ms_;
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resample_stopwatch_ = tick_timer_->GetNewStopwatch();
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max_delay_in_interval_ms_ = 0;
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}
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max_delay_in_interval_ms_ =
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std::max(max_delay_in_interval_ms_, relative_delay_ms);
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} else {
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histogram_update = relative_delay_ms;
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}
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if (!histogram_update) {
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return;
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}
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const int index = *histogram_update / kBucketSizeMs;
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if (index < histogram_.NumBuckets()) {
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// Maximum delay to register is 2000 ms.
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histogram_.Add(index);
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}
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int bucket_index = histogram_.Quantile(histogram_quantile_);
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optimal_delay_ms_ = (1 + bucket_index) * kBucketSizeMs;
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}
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void UnderrunOptimizer::Reset() {
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histogram_.Reset();
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resample_stopwatch_ = tick_timer_->GetNewStopwatch();
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max_delay_in_interval_ms_ = 0;
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optimal_delay_ms_.reset();
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}
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} // namespace webrtc
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