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Add DecelerationTargetLevelOffset Field Trial.

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This change allows NetEq to reach preferred jitter buffer size much faster
for high target delays because it uses absolute units instead of relative ones
during computation of lower_limit.

More details can be found here:
https://docs.google.com/document/d/12qPMJYFhGXrA_o_nvz9VshpzAJX6aULxFig1fTzBzDI/edit

Change-Id: I21ce0e35e25166d935fdf0325c083bcf990899f5

Bug: webrtc:10619
Change-Id: I21ce0e35e25166d935fdf0325c083bcf990899f5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/135745
Reviewed-by: Minyue Li <minyue@webrtc.org>
Reviewed-by: Jakob Ivarsson‎ <jakobi@webrtc.org>
Commit-Queue: Ruslan Burakov <kuddai@google.com>
Cr-Commit-Position: refs/heads/master@{#27970}
This commit is contained in:
Ruslan Burakov
2019-05-15 14:31:22 +02:00
committed by Commit Bot
parent 8e1a0080d3
commit 1e193faaf1
3 changed files with 152 additions and 9 deletions
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13
modules/audio_coding/neteq/delay_manager.h
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@ -101,6 +101,9 @@ class DelayManager {
// within to the corresponding pointers. The values are in (fractions of)
// packets in Q8.
virtual void BufferLimits(int* lower_limit, int* higher_limit) const;
virtual void BufferLimits(int target_level,
int* lower_limit,
int* higher_limit) const;
// Gets the target buffer level, in (fractions of) packets in Q8.
virtual int TargetLevel() const;
@ -130,6 +133,11 @@ class DelayManager {
}
// This accessor is only intended for testing purposes.
absl::optional<int> deceleration_target_level_offset_ms() const {
return deceleration_target_level_offset_ms_;
}
// These accessors are only intended for testing purposes.
HistogramMode histogram_mode() const { return histogram_mode_; }
int histogram_quantile() const { return histogram_quantile_; }
int histogram_forget_factor() const { return histogram_->forget_factor(); }
@ -196,6 +204,11 @@ class DelayManager {
const bool enable_rtx_handling_;
int num_reordered_packets_ = 0; // Number of consecutive reordered packets.
std::deque<int> delay_history_;
// When current buffer level is more than
// |deceleration_target_level_offset_ms_| below the target level, NetEq will
// impose deceleration to increase the buffer level. The value is in Q8, and
// measured in milliseconds.
const absl::optional<int> deceleration_target_level_offset_ms_;
RTC_DISALLOW_COPY_AND_ASSIGN(DelayManager);
};