/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:    

*

*/

#include "mcecomaudiocodec.h"

#include "mceamrcodec.h"

#include "mceg711codec.h"   

#include "mceg729codec.h"    

#include  "mceilbccodec.h"  

#include "mceserial.h"

#include "mceevents.h"

#include "mcecomrtpsource.h"

#include "mcertpsource.h"

#ifdef MCE_COMMON_SERVER_SIDE

#include <mmcccodecinformation.h>

#include "mcesrvstream.h"

#include "mcesrvsource.h"

#include "mcemmlogs.h"

#endif//MCE_COMMON_SERVER_SIDE

// CONSTANTS

const TUint KMceSamplingFreq8000 = 8000;

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CMceComAudioCodec::NewL

// -----------------------------------------------------------------------------

//

CMceComAudioCodec* CMceComAudioCodec::NewL( TBuf8<KMceMaxSdpNameLength> aSdpName )

    {

    CMceComAudioCodec* self = NewLC( aSdpName );

    CleanupStack::Pop( self );

    return self;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::NewLC

// -----------------------------------------------------------------------------

//

CMceComAudioCodec* CMceComAudioCodec::NewLC( TBuf8<KMceMaxSdpNameLength> aSdpName )

    {

    CMceComAudioCodec* self = new (ELeave) CMceComAudioCodec();

    CleanupStack::PushL( self );

    self->ConstructL( aSdpName );

    return self;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::~CMceComAudioCodec

// -----------------------------------------------------------------------------

//

CMceComAudioCodec::~CMceComAudioCodec()

    {

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::CMceComAudioCodec

// -----------------------------------------------------------------------------

//

CMceComAudioCodec::CMceComAudioCodec()

  : CMceComCodec(),

    iEnableVAD( EFalse ),

    iSamplingFreq( 0 ),

    iPTime( 0 ),

    iMaxPTime( 0 ),

    iRedPayloadType( KMcePayloadTypeUndefined ),

    iRedCount( 0 ),

    iComfortNoiseEnabled( EFalse )

    {

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::ConstructL

// -----------------------------------------------------------------------------

//

CMceComAudioCodec* CMceComAudioCodec::CloneL()

    {

    CMceComAudioCodec* copy = new (ELeave) CMceComAudioCodec();

    CleanupStack::PushL( copy );

    copy->ConstructL( *this );

    CleanupStack::Pop( copy );

    return copy;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::ConstructL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::ConstructL( TBuf8<KMceMaxSdpNameLength> aSdpName )

    {

    CMceComCodec::ConstructL( aSdpName );

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::ConstructL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::ConstructL( CMceComAudioCodec& aCodec )

    {

    CMceComCodec::ConstructL( aCodec );

    iEnableVAD = aCodec.iEnableVAD;

	iSamplingFreq = aCodec.iSamplingFreq;	

	iPTime = aCodec.iPTime;

	iMaxPTime = aCodec.iMaxPTime;

	iRedPayloadType = aCodec.iRedPayloadType;

    iRedCount = aCodec.iRedCount;

    iComfortNoiseEnabled = aCodec.iComfortNoiseEnabled;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::InternalizeFlatL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::InternalizeFlatL( RReadStream& aReadStream )

    {

    CMceComCodec::InternalizeFlatL( aReadStream );

    iEnableVAD = static_cast<TBool>( aReadStream.ReadUint8L() );

	iSamplingFreq = aReadStream.ReadUint16L();

	iPTime = aReadStream.ReadUint16L();

	iMaxPTime = aReadStream.ReadUint16L();

	iRedPayloadType = aReadStream.ReadUint8L();

	iRedCount = aReadStream.ReadUint16L();

	iComfortNoiseEnabled = static_cast<TBool>( aReadStream.ReadUint8L() );

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::ExternalizeFlatL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::ExternalizeFlatL( RWriteStream& aWriteStream )

    {

    CMceComCodec::ExternalizeFlatL( aWriteStream );

    aWriteStream.WriteUint8L( iEnableVAD );

    aWriteStream.WriteUint16L( iSamplingFreq );

    aWriteStream.WriteUint16L( iPTime );

    aWriteStream.WriteUint16L( iMaxPTime ); 

    aWriteStream.WriteUint8L( iRedPayloadType );

    aWriteStream.WriteUint16L( iRedCount ); 

    aWriteStream.WriteUint8L( iComfortNoiseEnabled );

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::UpdateL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::UpdateL( CMceComCodec& aUpdate )

    {

    CMceComCodec::UpdateL( aUpdate );

    CMceComAudioCodec& update = static_cast<CMceComAudioCodec&>( aUpdate );

    iEnableVAD = update.iEnableVAD;

    iSamplingFreq = update.iSamplingFreq;

    if ( IS_RECEIVESTREAM( iStream ) )

        {

        iPTime = update.iPTime;

        iMaxPTime = update.iMaxPTime;

        }

    iRedPayloadType = update.iRedPayloadType;

    iRedCount = update.iRedCount;

    iComfortNoiseEnabled = update.iComfortNoiseEnabled;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::Factory

// -----------------------------------------------------------------------------

//

TMceComAudioCodecFactory CMceComAudioCodec::Factory()

    {

    return TMceComAudioCodecFactory();

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::CompareSdpIndex

// -----------------------------------------------------------------------------

//

TInt CMceComAudioCodec::CompareSdpIndex( 

    const CMceComAudioCodec& aIndex1, const CMceComAudioCodec& aIndex2 )

    {

    // NOTE: if zero (equals) is returned from here, order is strangely anyway

    // changed. Returning positive value if indexes are equal is for avoiding

    // this quirk.

    if ( aIndex1.iCodecSdpIndex >= aIndex2.iCodecSdpIndex )

        {

        return (1);

        }

    else if ( aIndex1.iCodecSdpIndex < aIndex2.iCodecSdpIndex )

        {

        return (-1);

        }

    else

        {

        return (0);

        }

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::SetSamplingFreq

// -----------------------------------------------------------------------------

//

TInt CMceComAudioCodec::SetSamplingFreq( TUint aSamplingFreq )

    {

    if ( KMceSamplingFreq8000 == aSamplingFreq )

        {

        iSamplingFreq = aSamplingFreq;

        return KErrNone;

        }

    else

        {

        return KErrNotSupported;

        }

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::SetPTime

// -----------------------------------------------------------------------------

//

TInt CMceComAudioCodec::SetPTime( TUint aPTime )

    {

    if ( ( 0 < aPTime ) && ( aPTime <= iMaxPTime ) )

        {

        iPTime = aPTime;

        return KErrNone;

        }

    else

        {

        return KErrNotSupported;

        }

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::SetMaxPTime

// -----------------------------------------------------------------------------

//

TInt CMceComAudioCodec::SetMaxPTime( TUint aMaxPTime )

    {

    if ( ( 0 < aMaxPTime ) && ( iPTime <= aMaxPTime ) )

        {

        iMaxPTime = aMaxPTime;

        return KErrNone;

        }

    else

        {

        return KErrNotSupported;

        }

    }

#ifdef MCE_COMMON_SERVER_SIDE

// -----------------------------------------------------------------------------

// CMceComAudioCodec::operator=

// -----------------------------------------------------------------------------

//

/*lint -e1539 */

CMceComCodec& CMceComAudioCodec::operator=( CMccCodecInformation& aMccCodec )

    {

	iPayloadType = aMccCodec.PayloadType();

	iBitrate = aMccCodec.Bitrate();

	iAllowedBitrates = aMccCodec.AllowedBitrates();

	iCodecMode = aMccCodec.CodecMode();

	iFourCC = aMccCodec.FourCC();

	iFrameSize = aMccCodec.FrameSize();

    iEnableVAD = aMccCodec.VAD();

	iSamplingFreq = aMccCodec.SamplingFreq();

	iPTime = aMccCodec.PTime();

	iMaxPTime = aMccCodec.MaxPTime();

	iRedPayloadType = aMccCodec.RedundancyPT();

	iRedCount = aMccCodec.RedCount();

	iComfortNoiseEnabled = 

	    ( aMccCodec.ComfortNoiseGeneration() != KPayloadTypeUndefined );

    return *this;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoMccDecodeL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::DoMccDecodeL( CMccCodecInformation& aMccCodec )

    {

    //copy values, which are not explicitely in SDP, from mcc codec

	iSamplingFreq = aMccCodec.SamplingFreq();

	iBitrate = aMccCodec.Bitrate();

	iRedPayloadType = aMccCodec.RedundancyPT();

	iRedCount = aMccCodec.RedCount();

	iComfortNoiseEnabled = aMccCodec.ComfortNoiseGeneration();

	//copy the value of VAD which are received from MO side

	iEnableVAD = aMccCodec.VAD();

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoMccEncodeL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::DoMccEncodeL( CMccCodecInformation& aMccCodec,

                                      CMceSrvStream& aStream )

    {

    User::LeaveIfError( aMccCodec.SetSamplingFreq( iSamplingFreq ) );

    // Packet times are negotiated at session or media line level but all 

    // codecs in a group may not support all packet times. In this case 

    // codec's defaults are taken into use so that session negotiation is not 

    // unnecessary failed.

    if ( KErrNone != aMccCodec.SetMaxPTime( iMaxPTime ) )

        {

	    iMaxPTime = aMccCodec.MaxPTime();

	    }

    if ( KErrNone != aMccCodec.SetPTime( iPTime ) )

        {

        iPTime = aMccCodec.PTime();

        }

    User::LeaveIfError( aMccCodec.EnableVAD( iEnableVAD ) );

    User::LeaveIfError( aMccCodec.SetBitrate( iBitrate ) );

    if ( aStream.Source().Data().iType == KMceRTPSource )

        {

        CMceComRtpSource& rtpSource = 

		    static_cast<CMceComRtpSource&> ( aStream.Source().Data() );

		User::LeaveIfError( 

    	    aMccCodec.SetJitterBufInactivityTimeOut( rtpSource.iInactivityTimer ) );

    	User::LeaveIfError( 

    	    aMccCodec.SetJitterBufThreshold( rtpSource.iBufferTreshold ) );

    	User::LeaveIfError( 

    	    aMccCodec.SetJitterBufBufferLength( rtpSource.iBufferLength ) );

        }

    DoMccEncodeComfortNoiseL( aMccCodec, aStream );

    DoMccEncodeRedundancyL( aMccCodec, aStream );

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoMccValidateL

// -----------------------------------------------------------------------------

//

CMceComCodec* CMceComAudioCodec::DoMccValidateL( CMccCodecInformation& aMccCodec,

                                                 CMceSrvStream& aStream,

                                                 TMceNegotiationRole aRole )

    {

    //if answerer mcc codec represents the received offer and codec the answer

    //if offerer codec represents the sent offer and mcc codec the answer

    TBool notValid = aRole == EMceRoleAnswerer ?

                  ( iAllowedBitrates && aMccCodec.AllowedBitrates() == 0 ||

	                iAllowedBitrates > aMccCodec.AllowedBitrates() ) :

                  ( iAllowedBitrates && aMccCodec.AllowedBitrates() == 0 ||

	                iAllowedBitrates < aMccCodec.AllowedBitrates() );

	User::LeaveIfError( notValid ? KErrNotSupported : KErrNone );

	//Explicitly call default implementation of DoMccValidateL in base class

	// to enable the check for codecMode

	return CMceComCodec::DoMccValidateL( aMccCodec, aStream, aRole);  

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoMccRequireSignalling

// -----------------------------------------------------------------------------

//

TInt CMceComAudioCodec::DoMccRequireSignalling( 

    const CMceSrvStream& aStream,

    const CMccCodecInformation& aMccCurentCodec, 

    const CMccCodecInformation& aMccUpdateCodec ) const

    {

    TInt action = KMceNoSignalling;

    if ( aStream.StreamType() == CMceComMediaStream::EReceiveStream ||

         aStream.StreamType() == CMceComMediaStream::EReceiveOnlyStream )

        {

        if ( aMccCurentCodec.PTime() != aMccUpdateCodec.PTime() ||

             aMccCurentCodec.MaxPTime() != aMccUpdateCodec.MaxPTime() )

            {

            action = KMceRequiresSignalling;

            }

        }

    return action;

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoMccAdjustL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::DoMccAdjustL( CMccCodecInformation& aMccCodec,

                                      CMceSrvStream& aStream )

    {

	if( aStream.Data().iStreamType == CMceComMediaStream::ESendStream ||

        aStream.Data().iStreamType == CMceComMediaStream::ESendOnlyStream )

		{

	    // Do nothing if iPTime or iMaxPTime is greater than codecs supports.

	    // Then codecs default values is used.

		aMccCodec.SetPTime( iPTime );

		aMccCodec.SetMaxPTime( iMaxPTime );

		User::LeaveIfError( aMccCodec.SetBitrate( iBitrate ) );

		DoMccEncodeComfortNoiseL( aMccCodec, aStream );

		}

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoSetDefaultFmtpAttributeL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::DoSetDefaultFmtpAttributeL()

    {

    // NOP

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoDecodeAudioL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::DoDecodeAudioL( 

    TInt aCodecIndex,

    RPointerArray<CMceSrvStream>& aStreams,

    CMceComAudioStream& aAudio,

    CMceMediaManager& aManager )

    {

    if ( aCodecIndex == 0 || IS_RECEIVESTREAM( &aAudio ) )

        {

        SetEnabled( ETrue );

        }

    for( TInt sinkNdx = 0; sinkNdx < aAudio.Sinks().Count(); sinkNdx++ )

        {

        CMceSrvStream* srvStream = 

            CMceSrvStream::NewL( aManager, 

                                 aAudio, 

                                 *aAudio.Source(),

                                 *aAudio.Sinks()[ sinkNdx ],

                                 *this );

        CleanupStack::PushL( srvStream );

        MCEMM_DEBUG_STREAM( "CMceComAudioCodec::DoDecodeAudioL(): decoded audio", 

                            *srvStream );

        aStreams.AppendL( srvStream );

        CleanupStack::Pop( srvStream );

        } 

    }

// -----------------------------------------------------------------------------

// CMceComAudioCodec::DoMccEncodeComfortNoiseL

// -----------------------------------------------------------------------------

//

void CMceComAudioCodec::DoMccEncodeComfortNoiseL( 

    CMccCodecInformation& aMccCodec,

    CMceSrvStream& aStream )

    {

    // If CN codec is not anymore present in session, disable comfort noise

    // generation from this codec.

    CMceComAudioCodec* searchCodec = Factory().CreateCodecLC( KMceSDPNameCn() );

    CMceComCodec* cnCodec = aStream.Data().FindCodecL( *searchCodec );

    iComfortNoiseEnabled = cnCodec ? cnCodec->iIsNegotiated : EFalse;

    // KPayloadTypeUndefined is used if cn is disabled   

    TUint8 comforNoisePt = 

        iComfortNoiseEnabled ? cnCodec->iPayloadType : KPayloadTypeUndefined;

    // If cn is disabled, handle removing the codec here

    if ( !iComfortNoiseEnabled )

    	{

    	aStream.Data().RemoveCodecL( cnCodec );

    	if ( aStream.Data().BoundStream() )

            {

            CMceComCodec* boundCnCodec = 

            	aStream.Data().BoundStreamL().FindCodecL( *searchCodec );

           	aStream.Data().BoundStreamL().RemoveCodecL( boundCnCodec );

            }