zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add NetEq::FilteredCurrentDelayMs() and use it in VoiceEngine

Browse Source 
The new method returns the current total delay (packet buffer and sync
buffer) in ms, with smoothing applied to even out short-time
fluctuations due to jitter. The packet buffer part of the delay is not
updated during DTX/CNG periods.

This CL also pipes the new metric through ACM and uses it in
VoiceEngine. It replaces the previous method of estimating the buffer
delay (where an inserted packet's RTP timestamp was compared with the
last played timestamp from NetEq). The new method works better under
periods of DTX/CNG.

Review-Url: https://codereview.webrtc.org/2262203002
Cr-Commit-Position: refs/heads/master@{#13855}
This commit is contained in:
henrik.lundin
2016-08-22 15:39:53 -07:00
committed by Commit bot
parent e131ea50b4
commit b3f1c5d2fe
8 changed files with 53 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
webrtc/modules/audio_coding/neteq/neteq_impl.cc
View File

@ -353,6 +353,22 @@ int NetEqImpl::CurrentDelayMs() const {
return delay_ms;
}
int NetEqImpl::FilteredCurrentDelayMs() const {
rtc::CritScope lock(&crit_sect_);
// Calculate the filtered packet buffer level in samples. The value from
// |buffer_level_filter_| is in number of packets, represented in Q8.
const size_t packet_buffer_samples =
(buffer_level_filter_->filtered_current_level() *
decoder_frame_length_) >>
8;
// Sum up the filtered packet buffer level with the future length of the sync
// buffer, and divide the sum by the sample rate.
const size_t delay_samples =
packet_buffer_samples + sync_buffer_->FutureLength();
// The division below will truncate. The return value is in ms.
return static_cast<int>(delay_samples) / rtc::CheckedDivExact(fs_hz_, 1000);
}
// Deprecated.
// TODO(henrik.lundin) Delete.
void NetEqImpl::SetPlayoutMode(NetEqPlayoutMode mode) {