multimediacommsengine/tsrc/mccstub/src/MmccCodecRed.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:04:58 +0200
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/*
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* Copyright (c) 2005 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:    MCC Redundancy CodecInformation
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*
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*/
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// INCLUDE FILES
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#include "mmcccodecred.h"
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#include "mccuids.hrh"
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#include "mmccinterfacelogs.h"
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#include "mccinternalcodecs.h"
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// ============================= LOCAL FUNCTIONS ===============================
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// ============================ MEMBER FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// CMccCodecRed::CMccCodecRed
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// default constructor
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// -----------------------------------------------------------------------------
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//
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CMccCodecRed::CMccCodecRed() : CMccCodecInformation()
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    {
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::ConstructL
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// Symbian 2nd phase constructor can leave.
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// -----------------------------------------------------------------------------
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//
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void CMccCodecRed::ConstructL()
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    {
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    iSdpName.Copy( KRedSdpName );
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    iFmtpAttr = HBufC8::NewL( 1 );
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    TPtr8 ptr = iFmtpAttr->Des();
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    ptr.Append( KNullDesC );
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    SetSamplingFreq( KRedSamplingFreq );
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    EnableVAD( EFalse );
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    SetMaxPTime( KRedMaxPTime ); // recommended "limit" 200ms
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    SetPTime( KRedPTime ); // default 20ms 
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    SetPayloadType( KDefaultRedPT );  
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    iFourCC = KMccFourCCIdRed;
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    iCodecMode = ENothing;
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    iPayloadFormatEncoder = KImplUidRedPayloadFormatEncode;
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    iPayloadFormatDecoder = KImplUidRedPayloadFormatDecode;
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::NewLC
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// Static constructor.
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// -----------------------------------------------------------------------------
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//
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CMccCodecRed* CMccCodecRed::NewL()
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    {
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    CMccCodecRed* self = new (ELeave) CMccCodecRed;
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self ); 
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    return self;
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::~CMccCodecRed
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// Destructor
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// -----------------------------------------------------------------------------   
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//
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CMccCodecRed::~CMccCodecRed()
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    {
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    iRedPayloads.Reset();
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    iRedPayloads.Close();
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::RequireSignalling
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// -----------------------------------------------------------------------------
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//
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TBool CMccCodecRed::RequireSignalling(
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    const CMccCodecInformation& aCandidate ) const      
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    {
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    return CMccCodecInformation::RequireSignalling( aCandidate );
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::SetBitrate
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// Sets the bitrate used with Redundacy codec.
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// -----------------------------------------------------------------------------
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//
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TInt CMccCodecRed::SetBitrate( TUint aBitrate )
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    {
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    iBitrate = aBitrate;
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    return KErrNone;
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::SetSamplingFreq
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// Sets the sampling frequency. 
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// -----------------------------------------------------------------------------
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//
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TInt CMccCodecRed::SetSamplingFreq( TUint32 aSamplingFreq )
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    {
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    iSamplingFreq = aSamplingFreq;
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    return KErrNone;
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::SetSdpName
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// Sets the SDP name
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// -----------------------------------------------------------------------------
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TInt CMccCodecRed::SetSdpName( const TDesC8& aSdpName )
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    {
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    if ( !aSdpName.CompareF( KRedSdpName ) )
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        {
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        iSdpName.Copy( aSdpName );
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   135
        }
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    else 
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        {
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        return KErrNotSupported;
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   139
        }
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    return KErrNone;
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   142
    }
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   143
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// -----------------------------------------------------------------------------
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// CMccCodecRed::PayloadType
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// Sets the payload type
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// -----------------------------------------------------------------------------
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TInt CMccCodecRed::SetPayloadType( TUint8 aPayloadType )
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    {
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    if ( aPayloadType < KMinDynamicPT ||
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         aPayloadType > KMaxPayloadType ) 
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        {
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        return KErrNotSupported;
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   154
        }
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   155
    else 
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        {
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        iPayloadType = aPayloadType;
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   158
        return KErrNone;
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   159
        }
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   160
    }
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parents:
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   161
    
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// -----------------------------------------------------------------------------
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   163
// CMccCodecRed::SetCodecMode
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// Sets the codec mode
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// -----------------------------------------------------------------------------
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TInt CMccCodecRed::SetCodecMode( TCodecMode aCodecMode )
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    {
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   168
    if ( ENothing == aCodecMode )
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   169
        {
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        iCodecMode = aCodecMode;
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        return KErrNone;
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   172
        }
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   173
    else
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parents:
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   174
        {
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   175
        return KErrNotSupported;
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   176
        }
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   177
    }
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   178
     
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// -----------------------------------------------------------------------------
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// CMccCodecRed::EnableVAD
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// 
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// -----------------------------------------------------------------------------
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TInt CMccCodecRed::EnableVAD( TBool aEnableVAD ) 
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   184
    {
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    iEnableVAD = aEnableVAD;        
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   186
    return KErrNone;
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   187
    }
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   188
    
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   189
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// -----------------------------------------------------------------------------
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   191
// CMccCodecRed::SetPTime
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   192
//
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   193
// -----------------------------------------------------------------------------
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   194
//
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   195
TInt CMccCodecRed::SetPTime( TUint aPTime )
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   196
    {
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   197
    if ( aPTime && ( KMinPtime <= aPTime ) &&  ( aPTime <= KMaxPtime ) && 
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   198
        (( aPTime % KMinPtime )  == 0 ))
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   199
        {
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        iPTime = aPTime;
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   201
        return KErrNone;    
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   202
        }
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   203
    else
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parents:
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   204
        {
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   205
        return KErrNotSupported;
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   206
        }
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   207
    }
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   208
    
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// -----------------------------------------------------------------------------
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   210
// CMccCodecRed::SetMaxPTime
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   211
//
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   212
// -----------------------------------------------------------------------------
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   213
//
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   214
TInt CMccCodecRed::SetMaxPTime( TUint aMaxPTime )
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parents:
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   215
    {
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   216
    if ( aMaxPTime && ( iPTime <= aMaxPTime )&& ( KMinPtime <= aMaxPTime ) && 
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parents:
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   217
        ( aMaxPTime <= KMaxPtime ) && (( aMaxPTime % KMinPtime )  == 0 ) )
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parents:
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   218
        {
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   219
        iMaxPTime = aMaxPTime;
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   220
        return KErrNone;    
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parents:
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   221
        }
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parents:
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   222
    else
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parents:
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   223
        {
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   224
        return KErrNotSupported;
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parents:
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   225
        }
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parents:
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   226
    }
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parents:
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   227
    
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   228
// -----------------------------------------------------------------------------
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   229
// CMccCodecInformation::ParseFmtpAttr
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   230
// Parses the fmtp attribute
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   231
// -----------------------------------------------------------------------------
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parents:
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   232
//
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parents:
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   233
TBool CMccCodecRed::ParseFmtpAttrL( const TDesC8& aFmtp )
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parents:
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   234
    {
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    // Parse codecs used for primary and secondary etc. codecs from the 
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    // fmtp attribute
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    // example fmtp attribute:
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    // a=fmtp:99 0/103 
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    // 99 is the redundancy format payload type
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    // 0 is the primary codecs payload type
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    // 103 is the secondary codecs payload type
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    // NOTE: currently redundancy is allowed only for single payload type
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    TBool updated( EFalse );
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    TInt nextIndex = 0;
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    TInt prevIndex = 0;
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    TUint8 prevPayloadFormat = KMccPayloadTypeMax;
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    HBufC8* modifyBuf = HBufC8::NewLC( aFmtp.Length() );
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    TPtr8 pFmtpValue( modifyBuf->Des() );
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    pFmtpValue = aFmtp;
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    if( aFmtp.Length() > 0 )
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        {   
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        // Search for all the slashes and convert number strings between them
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        // to integers    
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        TBool found = ETrue;
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        while( EFalse != found )
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            {     
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            pFmtpValue = modifyBuf->Mid( nextIndex );
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            nextIndex = pFmtpValue.Locate( KCharSlash );          
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   263
            if( ( KErrNotFound == nextIndex ) ) 
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                {
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                found = EFalse;
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                if( 0 != pFmtpValue.Length() )
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                    {
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                    nextIndex = pFmtpValue.Length(); // Handle last payload value      
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                    }
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                }
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            if( 0 != pFmtpValue.Length() )
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                {
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                TLex8 lex = pFmtpValue.Mid( prevIndex, (nextIndex - prevIndex) );
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                TUint8 payloadFormat;
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                TInt err = lex.Val( payloadFormat, EDecimal );
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                if( KErrNone == err )
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                    {
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                    if ( prevPayloadFormat != KMccPayloadTypeMax &&
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                         prevPayloadFormat != payloadFormat )
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                         {
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                         iRedPayloads.Reset();
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                         User::Leave( KErrNotSupported );
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                         }
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                    iRedPayloads.AppendL( static_cast<TUint>( payloadFormat ) );  
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                    updated = ETrue;  
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                    prevPayloadFormat = payloadFormat;  
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                    }
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                nextIndex++;         
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                prevIndex = 0;
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                }
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            }
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        }
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   295
    
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    CleanupStack::PopAndDestroy( modifyBuf );
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   297
    
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    return updated;
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   299
    }
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   300
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// -----------------------------------------------------------------------------
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// CMccCodecRed::SetAllowedBitrates
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// -----------------------------------------------------------------------------
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// 
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   305
TInt CMccCodecRed::SetAllowedBitrates( TUint /*aBitrateMask*/ )
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    {
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    return KErrNone;           
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   308
    }
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// -----------------------------------------------------------------------------
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   311
// CMccCodecRed::SetRedCodecs
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// Set the payload types used in redundancy
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// -----------------------------------------------------------------------------
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   314
//
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   315
void CMccCodecRed::SetRedPayloadsL( RArray<TUint>& aRedPayloads )
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    {
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    iRedPayloads.Reset();
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    TInt i;
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   319
    for( i = 0; i < aRedPayloads.Count(); i++ )
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   320
        {
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   321
        iRedPayloads.AppendL( aRedPayloads[ i ] );  
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   322
        }
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   323
    
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   324
    // Convert parsed payload formats back to string and set
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   325
    // the iFmtpAttr variable
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   326
    const TInt KCharsPerPayload( 4 );
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   327
    delete iFmtpAttr;
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   328
    iFmtpAttr = NULL;
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   329
    iFmtpAttr = HBufC8::NewL( iRedPayloads.Count() * KCharsPerPayload );
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   330
    
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   331
    TPtr8 descPtr = iFmtpAttr->Des();
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   332
    for( i = 0; i < iRedPayloads.Count(); i++ )
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   333
        {
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   334
        descPtr.AppendNum( static_cast<TUint64>( iRedPayloads[i] ), EDecimal );
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   335
        descPtr.Append( KCharSlash );       
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   336
        }   
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   337
    
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   338
    // Remove the last slash character
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   339
    descPtr.SetLength( descPtr.Length() - 1 );  
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   340
    }
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   341
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   342
// -----------------------------------------------------------------------------
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   343
// CMccCodecRed::RedPayloadsL
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   344
// Fills array with red payload type values
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   345
// -----------------------------------------------------------------------------
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   346
//
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   347
void CMccCodecRed::RedPayloadsL( RArray<TUint>& aRedPayloads ) const
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   348
    {
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   349
    for ( TInt i = 0; i < iRedPayloads.Count(); i++ )
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        {
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        aRedPayloads.AppendL( iRedPayloads[ i ] );
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        }
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecInformation::RedPayloads
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// Return the reference to the redundancy codecs array
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// -----------------------------------------------------------------------------
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//
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const RArray<TUint>& CMccCodecRed::RedPayloads() const
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    {
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    return iRedPayloads;
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    }
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// -----------------------------------------------------------------------------
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// CMccCodecRed::CloneDefaultsL
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// Make a default setting clone from this Redundancy codec
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// -----------------------------------------------------------------------------
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//
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CMccCodecInformation* CMccCodecRed::CloneDefaultsL()
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    {
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    return CMccCodecRed::NewL();
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    }
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// -----------------------------------------------------------------------------
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// CMCCAMRCodec::CloneDetailedL
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// Make a detailed clone from this Redundancy codec
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// -----------------------------------------------------------------------------
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//
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CMccCodecInformation* CMccCodecRed::CloneDetailedL()
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    {
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    CMccCodecRed* newCodec = CMccCodecRed::NewL();
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    CleanupStack::PushL( newCodec );   
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    newCodec->SetBitrate( this->Bitrate() );
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    newCodec->SetCodecMode( this->CodecMode() );
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    newCodec->SetMaxPTime( this->MaxPTime() );
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    newCodec->SetPayloadType( this->PayloadType() );
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    newCodec->SetPTime( this->PTime() );
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    newCodec->SetSamplingFreq( this->SamplingFreq() );
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    newCodec->SetSdpName( this->SdpName() );
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    newCodec->ParseFmtpAttrL( this->GetFmtpL() );
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    CleanupStack::Pop( newCodec );       
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    return newCodec;
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    }
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   395
    
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// ========================== OTHER EXPORTED FUNCTIONS =========================
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//  End of File