--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommsengine/mmceshared/src/mcecomilbccodec.cpp	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,389 @@
+/*
+* 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 "mceilbccodec.h"
+#include "mcecomilbccodec.h"
+
+#ifdef MCE_COMMON_SERVER_SIDE
+
+#include <mmcccodecinformation.h>
+#include "mcesrvstream.h"
+#include "mcesrvsource.h"
+
+#endif//MCE_COMMON_SERVER_SIDE
+
+// Frame Size
+const TUint KMceiLBCMode20FrameSize = 20;
+const TUint KMceiLBCMode30FrameSize = 30;
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::NewL
+// -----------------------------------------------------------------------------
+//
+CMceComiLBCCodec* CMceComiLBCCodec::NewL( TBuf8<KMceMaxSdpNameLength> aSdpName )
+    {
+    CMceComiLBCCodec* self = NewLC( aSdpName );
+    CleanupStack::Pop( self );
+    return self;
+    
+    }
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::NewLC
+// -----------------------------------------------------------------------------
+//
+CMceComiLBCCodec* CMceComiLBCCodec::NewLC( TBuf8<KMceMaxSdpNameLength> aSdpName )
+    {
+    CMceComiLBCCodec* self = new (ELeave) CMceComiLBCCodec();
+    CleanupStack::PushL( self );
+    self->ConstructL( aSdpName );
+    return self;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::~CMceComiLBCCodec
+// -----------------------------------------------------------------------------
+//
+CMceComiLBCCodec::~CMceComiLBCCodec()
+    {
+    }
+    
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::CMceComiLBCCodec
+// -----------------------------------------------------------------------------
+//
+CMceComiLBCCodec::CMceComiLBCCodec()
+ : CMceComAudioCodec()
+    {
+    iFourCC = 0;
+    iEnableVAD = EFalse;
+    iSamplingFreq  = KMceiLBCSamplingFreq;
+    iBitrate  = KMceiLBCLevel30Bitrate;   
+    iPTime = KMceiLBCDefaultPtime30;
+    iMaxPTime = KMceiLBCDefaultMaxPtime;
+    iAllowedBitrates = KMceAllowediLBCBitrate20| 
+					   KMceAllowediLBCBitrate30;
+    iPayloadType = KMceDefaultiLBCPayloadType;
+    iCodecMode = KiLBCodecMode;					   
+    iFrameSize = KMceiLBCMode30FrameSize;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::ConstructL
+// -----------------------------------------------------------------------------
+//
+CMceComAudioCodec* CMceComiLBCCodec::CloneL()
+    {
+    CMceComiLBCCodec* copy = new (ELeave) CMceComiLBCCodec();
+    CleanupStack::PushL( copy );
+    copy->ConstructL( *this );
+    CleanupStack::Pop( copy );
+    return copy;
+    
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::ConstructL
+// -----------------------------------------------------------------------------
+//
+void CMceComiLBCCodec::ConstructL( TBuf8<KMceMaxSdpNameLength> aSdpName )
+    {
+    CMceComAudioCodec::ConstructL( aSdpName );
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::ConstructL
+// -----------------------------------------------------------------------------
+//
+void CMceComiLBCCodec::ConstructL( CMceComiLBCCodec& aCodec )
+    {
+    CMceComAudioCodec::ConstructL( aCodec );
+    }
+
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::SetBitrate
+// -----------------------------------------------------------------------------
+//
+TInt CMceComiLBCCodec::SetBitrate( TUint aBitrate )
+    {
+	TBool isValid = ETrue;
+	
+    switch ( aBitrate )
+    	{
+    	case KMceiLBCLevel20Bitrate:
+    	case KMceiLBCLevel30Bitrate:
+    	    {
+    	    if ( aBitrate > GetMaxBitRate() )
+    	        {
+        		isValid = EFalse;
+    	        }
+    	    break;
+    	    }
+    	default:
+    		isValid = EFalse;
+    		break;
+    	}
+    	
+    if ( isValid )
+    	{
+        return CMceComCodec::SetBitrate( aBitrate );
+    	}
+    else
+    	{
+    	return KErrNotSupported;
+    	}
+    
+    }
+
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::SetAllowedBitrates 
+// -----------------------------------------------------------------------------
+//
+
+TInt CMceComiLBCCodec::SetAllowedBitrates( TUint aBitrates )
+    {
+      TInt error = KErrNone;
+    
+      if ( !aBitrates || 
+        ( aBitrates >> 8 ) > 0 ) 
+        {
+        error = KErrArgument;
+        }
+    else
+        {
+        CMceComCodec::SetAllowedBitrates( KMceAllowediLBCBitrateAll );
+        iAllowedBitrates &= aBitrates;
+        TUint maxBitrate = GetMaxBitRate();
+        if ( iBitrate > maxBitrate )
+            {
+            error = CMceComCodec::SetBitrate( maxBitrate );
+            }
+        }
+    
+    return error;
+    
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::SetCodecMode
+// -----------------------------------------------------------------------------
+//
+TInt CMceComiLBCCodec::SetCodecMode( TUint aCodecMode )
+    {
+    if ( KiLBCodecMode == aCodecMode )
+        {
+        iCodecMode = aCodecMode;
+        return KErrNone;
+        }
+    else
+        {
+        return KErrNotSupported;
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::SetPayloadType
+// -----------------------------------------------------------------------------
+//
+TInt CMceComiLBCCodec::SetPayloadType( TUint8 aPayloadType )
+    {
+    if ( KMinDynPayloadType <= aPayloadType )
+        {
+        return CMceComCodec::SetPayloadType( aPayloadType );
+        }
+    else
+        {
+        return KErrNotSupported;
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::GetMaxBitRate  
+// -----------------------------------------------------------------------------
+//
+TUint CMceComiLBCCodec::GetMaxBitRate()
+    {
+    if( iAllowedBitrates & KMceAllowediLBCBitrate20 )
+        {
+        return KMceiLBCLevel20Bitrate;
+        }
+    else if( iAllowedBitrates & KMceAllowediLBCBitrate30 )
+        {
+        return KMceiLBCLevel30Bitrate;
+        }
+    else
+        {
+        return 0;    
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::SetPTime
+// Just basic validity checks can be done here. Valid configuration cannot be 
+// assured at method level. Client is responsible for setting ptime, maxptime 
+// and bitrate so that they are aligned with each other.
+// -----------------------------------------------------------------------------
+//
+TInt CMceComiLBCCodec::SetPTime( TUint aPTime )
+    {
+    if ( ( aPTime % KMceiLBCMode20FrameSize ) == 0 ||
+         ( aPTime % KMceiLBCMode30FrameSize ) == 0 )
+        {
+        return CMceComAudioCodec::SetPTime( aPTime );
+        }
+    else
+        {
+        return KErrNotSupported;
+        }
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::SetMaxPTime
+// -----------------------------------------------------------------------------
+//
+TInt CMceComiLBCCodec::SetMaxPTime( TUint aMaxPTime )
+    {
+    if ( ( aMaxPTime % KMceiLBCMode20FrameSize ) == 0 ||
+         ( aMaxPTime % KMceiLBCMode30FrameSize ) == 0 )
+        {
+        return CMceComAudioCodec::SetMaxPTime( aMaxPTime );
+        }
+    else
+        {
+        return KErrNotSupported;
+        }
+    }
+
+
+#ifdef MCE_COMMON_SERVER_SIDE
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::DoMccEncodeL
+// -----------------------------------------------------------------------------
+//
+void CMceComiLBCCodec::DoMccEncodeL( CMccCodecInformation& aMccCodec,
+                                     CMceSrvStream& aStream )
+    {
+    CMceComAudioCodec::DoMccEncodeL( aMccCodec, aStream );
+    
+    // iLBC codec may ignore ptime setting if it fights against codec mode,
+	// update MCE ptime to be one which is really used
+	iPTime = aMccCodec.PTime();	
+    }
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::DoMccValidateL
+// iLBC requires that both direction streams are in same mode.
+// Role answerer: mcccodec represents the received offer and codec the answer.
+// Role offerer: codec represents the sent offer and mcccodec the answer.
+// Do not allow bitrate upgrade when answering.
+// Ignore bitrate upgrade when offering.
+// -----------------------------------------------------------------------------
+//
+CMceComCodec* CMceComiLBCCodec::DoMccValidateL( CMccCodecInformation& aMccCodec,
+                                                CMceSrvStream& aStream,
+                                                TMceNegotiationRole aRole )
+    {
+    CMceComAudioCodec::DoMccValidateL( aMccCodec, aStream, aRole );
+     
+    TBool notValid = ( aRole == EMceRoleAnswerer && aMccCodec.Bitrate() < iBitrate ); 
+	User::LeaveIfError( notValid ? KErrNotSupported : KErrNone );
+
+    CMceComCodec* bidirectional = NULL;
+    
+    CMceComCodec& codec = aStream.Codec();
+    if ( codec.Stream()->BoundStream() )
+        {
+        CMceComCodec* boundCodec = 
+            codec.Stream()->BoundStreamL().FindCodecL( codec );
+        
+        bidirectional = 
+            ( boundCodec && boundCodec->iBitrate != aMccCodec.Bitrate() ) ? boundCodec : NULL;
+            
+        if ( bidirectional )
+            {
+            if ( aRole == EMceRoleOfferer )
+                {
+                if ( bidirectional->iBitrate < aMccCodec.Bitrate() )
+                    {
+                    // Ignoring bitrate upgrade
+                    __ASSERT_ALWAYS( bidirectional->iFmtpAttr, User::Leave( KErrNotReady ) );
+                    SetFmtpAttributeL( *bidirectional->iFmtpAttr );
+                    aMccCodec.SetFmtpAttrL( *bidirectional->iFmtpAttr );
+                    }
+                else
+                    {
+                    // Bitrate downgrade, NOP
+                    }
+                }
+            else
+                {
+                __ASSERT_ALWAYS( iFmtpAttr, User::Leave( KErrNotReady ) );
+                bidirectional->SetFmtpAttributeL( *iFmtpAttr );
+                }
+            }
+        }
+        
+    return bidirectional;    
+    }
+
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::DoMccAdjustL
+// -----------------------------------------------------------------------------
+//
+void CMceComiLBCCodec::DoMccAdjustL( CMccCodecInformation& aMccCodec,
+                                     CMceSrvStream& aStream )
+    {
+    CMceComAudioCodec::DoMccAdjustL( aMccCodec, aStream );
+		
+    // iLBC codec may ignore ptime setting if it fights against codec mode,
+	// update MCE ptime to be one which is really used
+	iPTime = aMccCodec.PTime();	
+    }
+    
+// -----------------------------------------------------------------------------
+// CMceComiLBCCodec::DoSetDefaultFmtpAttributeL
+// -----------------------------------------------------------------------------
+//
+void CMceComiLBCCodec::DoSetDefaultFmtpAttributeL()
+    {
+    SetFmtpAttributeL( KNullDesC8 );   
+    }
+    
+#endif
+        
+// End of File
+