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Raw packet loss rate reported by RTP_RTCP module may vary too drastically over time. This CL is to add a filter to the value in VoE before lending it to audio coding module.

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The filter is an exponential filter borrowed from video coding module.

The method is written in a new class called PacketLossProtector (not sure if the name is nice), which can be used in the future for more sophisticated logic.

BUG=
R=henrika@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/20809004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6709 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
minyue@webrtc.org
2014-07-16 21:28:26 +00:00
parent 4c3e9917e7
commit 74aaf29a0f
20 changed files with 391 additions and 204 deletions
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6
webrtc/modules/video_coding/main/source/media_opt_util.cc
View File

@ -837,7 +837,7 @@ uint8_t VCMLossProtectionLogic::FilteredLoss(
case kNoFilter:
break;
case kAvgFilter:
filtered_loss = static_cast<uint8_t> (_lossPr255.Value() + 0.5);
filtered_loss = static_cast<uint8_t>(_lossPr255.filtered() + 0.5);
break;
case kMaxFilter:
filtered_loss = MaxFilteredLossPr(nowMs);
@ -907,8 +907,8 @@ VCMLossProtectionLogic::UpdateMethod()
_currentParameters.keyFrameSize = _keyFrameSize;
_currentParameters.fecRateDelta = _fecRateDelta;
_currentParameters.fecRateKey = _fecRateKey;
_currentParameters.packetsPerFrame = _packetsPerFrame.Value();
_currentParameters.packetsPerFrameKey = _packetsPerFrameKey.Value();
_currentParameters.packetsPerFrame = _packetsPerFrame.filtered();
_currentParameters.packetsPerFrameKey = _packetsPerFrameKey.filtered();
_currentParameters.residualPacketLossFec = _residualPacketLossFec;
_currentParameters.codecWidth = _codecWidth;
_currentParameters.codecHeight = _codecHeight;

44
webrtc/modules/video_coding/main/source/media_opt_util.h
View File

@ -14,9 +14,9 @@
#include <math.h>
#include <stdlib.h>
#include "webrtc/base/exp_filter.h"
#include "webrtc/modules/video_coding/main/source/internal_defines.h"
#include "webrtc/modules/video_coding/main/source/qm_select.h"
#include "webrtc/modules/video_coding/utility/include/exp_filter.h"
#include "webrtc/system_wrappers/interface/trace.h"
#include "webrtc/typedefs.h"
@ -367,27 +367,27 @@ private:
// Sets the available loss protection methods.
void UpdateMaxLossHistory(uint8_t lossPr255, int64_t now);
uint8_t MaxFilteredLossPr(int64_t nowMs) const;
VCMProtectionMethod* _selectedMethod;
VCMProtectionParameters _currentParameters;
uint32_t _rtt;
float _lossPr;
float _bitRate;
float _frameRate;
float _keyFrameSize;
uint8_t _fecRateKey;
uint8_t _fecRateDelta;
int64_t _lastPrUpdateT;
int64_t _lastPacketPerFrameUpdateT;
int64_t _lastPacketPerFrameUpdateTKey;
VCMExpFilter _lossPr255;
VCMLossProbabilitySample _lossPrHistory[kLossPrHistorySize];
uint8_t _shortMaxLossPr255;
VCMExpFilter _packetsPerFrame;
VCMExpFilter _packetsPerFrameKey;
float _residualPacketLossFec;
uint16_t _codecWidth;
uint16_t _codecHeight;
int _numLayers;
VCMProtectionMethod* _selectedMethod;
VCMProtectionParameters _currentParameters;
uint32_t _rtt;
float _lossPr;
float _bitRate;
float _frameRate;
float _keyFrameSize;
uint8_t _fecRateKey;
uint8_t _fecRateDelta;
int64_t _lastPrUpdateT;
int64_t _lastPacketPerFrameUpdateT;
int64_t _lastPacketPerFrameUpdateTKey;
rtc::ExpFilter _lossPr255;
VCMLossProbabilitySample _lossPrHistory[kLossPrHistorySize];
uint8_t _shortMaxLossPr255;
rtc::ExpFilter _packetsPerFrame;
rtc::ExpFilter _packetsPerFrameKey;
float _residualPacketLossFec;
uint16_t _codecWidth;
uint16_t _codecHeight;
int _numLayers;
};
} // namespace media_optimization