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/*
* Copyright (c) 2012 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/delay_manager.h"
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include <memory>
#include "api/field_trials_view.h"
#include "api/neteq/tick_timer.h"
#include "modules/audio_coding/neteq/reorder_optimizer.h"
#include "rtc_base/experiments/struct_parameters_parser.h"
#include "rtc_base/logging.h"
namespace webrtc {
namespace {
constexpr int kStartDelayMs = 80;
std::unique_ptr<ReorderOptimizer> MaybeCreateReorderOptimizer(
const DelayManager::Config& config) {
if (!config.use_reorder_optimizer) {
return nullptr;
}
return std::make_unique<ReorderOptimizer>(
(1 << 15) * config.reorder_forget_factor, config.ms_per_loss_percent,
config.start_forget_weight);
}
} // namespace
DelayManager::Config::Config(const FieldTrialsView& field_trials) {
StructParametersParser::Create( //
"quantile", &quantile, //
"forget_factor", &forget_factor, //
"start_forget_weight", &start_forget_weight, //
"resample_interval_ms", &resample_interval_ms, //
"use_reorder_optimizer", &use_reorder_optimizer, //
"reorder_forget_factor", &reorder_forget_factor, //
"ms_per_loss_percent", &ms_per_loss_percent)
->Parse(field_trials.Lookup("WebRTC-Audio-NetEqDelayManagerConfig"));
}
void DelayManager::Config::Log() {
RTC_LOG(LS_INFO) << "Delay manager config:"
" quantile="
<< quantile << " forget_factor=" << forget_factor
<< " start_forget_weight=" << start_forget_weight.value_or(0)
<< " resample_interval_ms="
<< resample_interval_ms.value_or(0)
<< " use_reorder_optimizer=" << use_reorder_optimizer
<< " reorder_forget_factor=" << reorder_forget_factor
<< " ms_per_loss_percent=" << ms_per_loss_percent;
}
DelayManager::DelayManager(const Config& config, const TickTimer* tick_timer)
: underrun_optimizer_(tick_timer,
(1 << 30) * config.quantile,
(1 << 15) * config.forget_factor,
config.start_forget_weight,
config.resample_interval_ms),
reorder_optimizer_(MaybeCreateReorderOptimizer(config)),
target_level_ms_(kStartDelayMs) {
Reset();
}
DelayManager::~DelayManager() {}
void DelayManager::Update(int arrival_delay_ms, bool reordered) {
if (!reorder_optimizer_ || !reordered) {
underrun_optimizer_.Update(arrival_delay_ms);
}
target_level_ms_ =
underrun_optimizer_.GetOptimalDelayMs().value_or(kStartDelayMs);
if (reorder_optimizer_) {
reorder_optimizer_->Update(arrival_delay_ms, reordered, target_level_ms_);
target_level_ms_ = std::max(
target_level_ms_, reorder_optimizer_->GetOptimalDelayMs().value_or(0));
}
}
void DelayManager::Reset() {
underrun_optimizer_.Reset();
target_level_ms_ = kStartDelayMs;
if (reorder_optimizer_) {
reorder_optimizer_->Reset();
}
}
int DelayManager::TargetDelayMs() const {
return target_level_ms_;
}
} // namespace webrtc
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