1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* 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.
*/
#ifndef MODULES_AUDIO_CODING_NETEQ_DELAY_MANAGER_H_
#define MODULES_AUDIO_CODING_NETEQ_DELAY_MANAGER_H_
#include <memory>
#include <optional>
#include "api/field_trials_view.h"
#include "api/neteq/tick_timer.h"
#include "modules/audio_coding/neteq/reorder_optimizer.h"
#include "modules/audio_coding/neteq/underrun_optimizer.h"
namespace webrtc {
class DelayManager {
public:
struct Config {
explicit Config(const FieldTrialsView& field_trials);
void Log();
// Options that can be configured via field trial.
double quantile = 0.95;
double forget_factor = 0.983;
std::optional<double> start_forget_weight = 2;
std::optional<int> resample_interval_ms = 500;
bool use_reorder_optimizer = true;
double reorder_forget_factor = 0.9993;
int ms_per_loss_percent = 20;
};
DelayManager(const Config& config, const TickTimer* tick_timer);
virtual ~DelayManager();
DelayManager(const DelayManager&) = delete;
DelayManager& operator=(const DelayManager&) = delete;
// Updates the delay manager that a new packet arrived with delay
// `arrival_delay_ms`. This updates the statistics and a new target buffer
// level is calculated. The `reordered` flag indicates if the packet was
// reordered.
virtual void Update(int arrival_delay_ms, bool reordered);
// Resets all state.
virtual void Reset();
// Gets the target buffer level in milliseconds. If a minimum or maximum delay
// has been set, the target delay reported here also respects the configured
// min/max delay.
virtual int TargetDelayMs() const;
private:
UnderrunOptimizer underrun_optimizer_;
std::unique_ptr<ReorderOptimizer> reorder_optimizer_;
int target_level_ms_ = 0; // Currently preferred buffer level.
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_NETEQ_DELAY_MANAGER_H_
|
