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Improve adaptation to reordered packets in delay manager.

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This is done by adding a reorder optimizer that estimates the probability of receiving reordered packets.

The optimal delay is decided by balancing the cost of increasing the delay against the probability of missing a reordered packet, resulting in a loss. This balance is decided using the `ms_per_loss_percent` parameter.

The usage and parameters can be controlled via field trial.

Bug: webrtc:10178
Change-Id: Ic484df0412af35610e74b3a6070f2bac7a926a63
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/231541
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#34954}
This commit is contained in:
Jakob Ivarsson
2021-09-08 16:35:50 +02:00
committed by WebRTC LUCI CQ
parent 1f38a38b6f
commit 58ed02eae3
10 changed files with 251 additions and 11 deletions
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6
modules/audio_coding/neteq/delay_manager.h
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@ -20,6 +20,7 @@
#include "api/neteq/tick_timer.h"
#include "modules/audio_coding/neteq/histogram.h"
#include "modules/audio_coding/neteq/relative_arrival_delay_tracker.h"
#include "modules/audio_coding/neteq/reorder_optimizer.h"
#include "modules/audio_coding/neteq/underrun_optimizer.h"
#include "rtc_base/constructor_magic.h"
#include "rtc_base/experiments/struct_parameters_parser.h"
@ -39,6 +40,10 @@ class DelayManager {
absl::optional<int> resample_interval_ms;
int max_history_ms = 2000;
bool use_reorder_optimizer = true;
double reorder_forget_factor = 0.9993;
int ms_per_loss_percent = 20;
// Options that are externally populated.
int max_packets_in_buffer = 200;
int base_minimum_delay_ms = 0;
@ -104,6 +109,7 @@ class DelayManager {
// TODO(jakobi): set maximum buffer delay instead of number of packets.
const int max_packets_in_buffer_;
UnderrunOptimizer underrun_optimizer_;
std::unique_ptr<ReorderOptimizer> reorder_optimizer_;
RelativeArrivalDelayTracker relative_arrival_delay_tracker_;
int base_minimum_delay_ms_;