author | hgs |
Fri, 09 Jul 2010 13:14:28 +0300 | |
changeset 32 | f2ed1fc4c163 |
parent 0 | 1bce908db942 |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: MccJitterCalculator calculates jitter level and compares given |
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* triggers. |
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* |
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*/ |
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#ifndef MCCJITTERCALCULATOR_H |
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#define MCCJITTERCALCULATOR_H |
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// INCLUDES |
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#include <mmf/common/mmfcontrollerframework.h> |
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#include <mmccinterfacedef.h> |
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#ifdef FTD_ENABLED |
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#include <e32msgqueue.h> |
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#include <mccstreamstats.h> |
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#include <mccjbufferstats.h> |
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#endif |
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// CLASS DECLARATION |
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/** |
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* Observer for jitter calculation event notification |
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* |
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* @lib MccRtpSourceSink.dll |
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* @since Series 60 3.2 |
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*/ |
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class MRtpJitterObserver |
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{ |
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public: |
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virtual void SendJitterEvent( TMccRtpEventDataExtended aEvent, TInt aError ) = 0; |
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}; |
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/** |
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* Class which implements jittercalculations for received RTP packets |
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* |
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* @lib Mccrtpsourcesink.dll |
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* @since Series 60 3.0 |
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*/ |
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class CMccJitterCalculator : public CBase |
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{ |
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public: // Constructors and destructor |
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/** |
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* Two-phased constructor. |
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*/ |
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static CMccJitterCalculator* NewL( MRtpJitterObserver& aObserver ); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CMccJitterCalculator( ); |
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public: // New functions |
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/** |
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* Starts media quality observing |
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* @since Series 60 3.0 |
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* @return Error code |
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*/ |
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TInt StartObserving(); |
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/** |
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* Cancels media quality observing |
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* @since Series 60 3.0 |
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* @return void |
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*/ |
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void CancelObserving(); |
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/** |
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* Handles received packets and calculates jitter level |
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* @since Series 60 3.0 |
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* @param "aHeaderInfo" |
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* RTP header from received packet |
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* @return void |
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*/ |
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void RtpPacketReceived( const TUint32 aTimeStamp, TBool aMarker, TUint16 aSeqNum ); |
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/** |
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* Set media configurations |
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* @since Series 60 3.0 |
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* @param "aMessage" |
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* message from client |
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* @return void |
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*/ |
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void SetMediaConfigsL( const TMMFMessage& aMessage ); |
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/** |
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* Reset local counters |
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* @since Series 60 3.0 |
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* @return void |
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*/ |
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void ResetCounters( ); |
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|
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/** |
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* Check the observing status |
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* @since Series 60 3.0 |
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* @return iMediaQualityObservingStarted |
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*/ |
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TBool IsObserving() const; |
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private: |
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/** |
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* C++ default constructor. |
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*/ |
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CMccJitterCalculator( MRtpJitterObserver& aObserver ); |
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/** |
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* By default Symbian 2nd phase constructor is private. |
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*/ |
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void ConstructL(); |
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/** |
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* Jitter level observing routines |
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* @since Series 60 3.0 |
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* @return void |
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*/ |
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void JitterObserving(); |
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32 | 137 |
/** |
138 |
* Counts packet loss percentage from iStartingSeqNum, iCurrentSeqNum |
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* and iReceivedPacketCounter |
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* @return Counted packet loss percentage |
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*/ |
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TInt CountPacketLossPercentage(); |
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||
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/** |
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* Checks if current jitter level exceeds the jitter level given by the client, |
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* and if exceeded, sends the report to client |
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* @param "aReportIntervalReached" |
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* Changed to ETrue if the report interval was reached |
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* @param "aReportSent" |
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* Changed to ETrue if the jitter report was sent |
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* @return void |
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*/ |
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void CheckJitter( TBool& aReportIntervalReached, TBool& aReportSent ); |
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/** |
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* Checks if current packet loss level exceeds the packet loss level |
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* given by the client, and if exceeded, sends the report to client |
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* @param "aReportIntervalReached" |
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* Changed to ETrue if the report interval was reached |
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* @param "aReportSent" |
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* Changed to ETrue if the packet loss report was sent |
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* @return void |
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*/ |
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void CheckPacketLoss( TBool& aReportIntervalReached, TBool& aReportSent ); |
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||
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/** |
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* Calculates a new FER value |
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* @param aPrevValue Previous FER value |
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* @param aAdd Value to add( ETrue/EFalse) |
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* @param aFlag To add (ETrue) or remove (EFalse) |
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* @return new FER value |
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*/ |
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TUint32 CalculateFer( TUint32 aPrevValue, TBool aAdd, TBool aFlag ); |
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||
0
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private: |
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// Number of packets received |
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TUint32 iPacketsReceived; |
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// Current jitter estimate |
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TUint64 iCurJitter; |
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// Holds the previous packet arrival time |
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TTime iPrevPacketArrival; |
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|
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// Holds the previous packets transit time |
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TInt64 iPrevPacketTransit; |
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|
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// Indicates reference jitter level from client |
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TUint iJitterLevelFromClient; |
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|
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// Indicates current report type |
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TInt iReportType; |
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|
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// Indicates report interval type |
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TInt iReportIntervalType; |
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|
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// Indicates report interval |
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TInt iReportInterval; |
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|
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// Flags for indicating jitter level observing state and frame loss rate |
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TBool iJitterObsOn; |
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TBool iFrameLossObsOn; |
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|
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// Indicates observing state. Refer to IsObserving-method |
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TBool iMediaQualityObservingStarted; |
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|
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// Indicates interval time |
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TTime iIntervalTime; |
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|
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// Indicates packet loss rate from client |
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TInt iPacketLossFromClient; |
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|
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// Indicates amount of received packets |
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TUint32 iReceivedPacketCounter; |
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216 |
|
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// Media config buffer is filled with config data |
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TMccMediaQualityConfig iMediaConf; |
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|
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// Indicates home time |
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TTime iHomeTime; |
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|
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// Indicates current time |
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TTime iCurTime; |
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|
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/** |
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* jitter observer |
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* Own. |
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*/ |
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MRtpJitterObserver* iObserver; |
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|
32 | 232 |
// Current packet sequence number |
233 |
TUint16 iCurrentSeqNum; |
|
234 |
||
235 |
// Packet sequence number where to start counting the packet loss |
|
236 |
TUint16 iStartingSeqNum; |
|
237 |
||
238 |
// Holds the previous number of packets expected |
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239 |
TUint32 iPrevExpectedPackets; |
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240 |
||
241 |
// Holds the previous number of packets received |
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242 |
TUint32 iPrevPacketsReceived; |
|
243 |
||
244 |
// Holds the previous FER value |
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245 |
TUint32 iPrevFerValue; |
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246 |
||
0
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#ifdef FTD_ENABLED |
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|
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// Message queue carrying stream statistics |
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RMsgQueue<TMccStreamStats> iStreamStatsQueue; |
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|
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// Message queue carrying jitter buffer statistics |
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RMsgQueue<TMccJBufferStats> iJBufStatsQueue; |
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#endif |
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#ifdef TEST_EUNIT |
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public: |
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friend class UT_CMccRtpDataSource; |
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friend class UT_CMccJitterCalculator; |
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#endif |
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}; |
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#endif // MCCJITTERCALCULATOR_H |
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// End of File |