--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/multimediacommscontroller/mmccredpayloadformat/src/mccredencoder.cpp	Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,231 @@
+/*
+* Copyright (c) 2005-2006 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:    Encoder implementation capable to form redundancy RTP payload.
+*
+*/
+
+
+
+
+
+// INCLUDE FILES
+#include    "mccredencoder.h"
+#include    "streamformatter.h"
+#include    "mccredpayloadformatdefs.h"
+#include    "mccdef.h"
+
+// CONSTANTS
+const TUint KPrimaryEncPTInd = 0;
+
+// ============================= LOCAL FUNCTIONS ===============================
+
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CMccRedEncoder::CMccRedEncoder
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CMccRedEncoder::CMccRedEncoder()
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::CMccRedEncoder" )
+    }
+
+// -----------------------------------------------------------------------------
+// CMccRedEncoder::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CMccRedEncoder::ConstructL()
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::ConstructL" )
+    
+    iRedHeaders 
+        = HBufC8::NewL( KDefRedCount * KRedHeaderSize + KFinalHeaderSize );
+    }
+
+// -----------------------------------------------------------------------------
+// CMccRedEncoder::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CMccRedEncoder* CMccRedEncoder::NewL()
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::NewL" )
+        
+    CMccRedEncoder* self = new( ELeave ) CMccRedEncoder;
+    
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+
+    return self;
+    }
+
+    
+// Destructor
+CMccRedEncoder::~CMccRedEncoder()
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::~CMccRedEncoder" )
+        
+    iRedTimeStamps.Close();
+    delete iRedHeaders;
+    delete iRedPayload;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMCCRedEncoder::DoInitializeL
+// Initialize encoder after encoding parameters are changed or encoding is
+// started again after pause.
+// -----------------------------------------------------------------------------
+//
+void CMccRedEncoder::DoInitializeL( TInt aRedBlockCount, TInt aMaxPayloadSize,
+    TInt /*aNumOfEncodings*/ )
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::DoInitializeL" )
+
+    if ( KMaxRedCount < aRedBlockCount || 0 > aRedBlockCount )
+        {
+        User::Leave( KErrArgument );
+        }
+        
+    if ( KDefRedCount != aRedBlockCount )
+        {
+        delete iRedHeaders;
+        iRedHeaders = NULL;
+        iRedHeaders = HBufC8::NewL( 
+            aRedBlockCount * KRedHeaderSize + KFinalHeaderSize );
+        }
+
+    // Memory for redundant payloads without redundancy headers
+    TInt redPayloadSize( aRedBlockCount * aMaxPayloadSize );
+    if ( iRedPayload )
+        {
+        if ( iRedPayload->Data().MaxSize() < redPayloadSize )
+            {
+            delete iRedPayload;
+            iRedPayload = NULL;
+            iRedPayload = CMMFDataBuffer::NewL( redPayloadSize );
+            }
+        }
+    else
+        {
+        iRedPayload = CMMFDataBuffer::NewL( redPayloadSize );
+        }
+    
+    iRedPackets = EFalse;
+    iRedTimeStamps.Reset();
+    iRedHeaders->Des().Zero();
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMccRedEncoder::EncodePayloadL
+// Encode payloads set with SetEncoding() -method.
+// -----------------------------------------------------------------------------
+//    
+void CMccRedEncoder::EncodePayloadL( TUint aCurTimeStamp )
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::EncodePayload" )
+    __ASSERT_ALWAYS( iRTPPayload, User::Leave( KErrNotReady ) );
+    
+    TDes8& rtpPayload = iRTPPayload->Data();
+    rtpPayload.Zero();
+    
+    // Copy redundant payload if exist
+    if ( iRedPackets )
+        {
+        rtpPayload.Append( iRedPayload->Data() );
+        }
+    
+    // Append new payload to the end of redundancy RTP payload
+    rtpPayload.Append( iEncodings[EMccPrimaryEncoding]->Data() );
+    iRedTimeStamps.AppendL( aCurTimeStamp );
+    
+    ConstructRedHeaders( aCurTimeStamp );
+    rtpPayload.Insert( 0, *iRedHeaders );
+    
+    // Save redundant data block
+    iRedPayload->Data().Copy( iEncodings[EMccPrimaryEncoding]->Data() );
+    iRedPackets = ETrue;
+    }
+
+
+// -----------------------------------------------------------------------------
+// CMccRedEncoder::ConstructRedHeaders
+// Construct redundancy headers.
+// -----------------------------------------------------------------------------
+//        
+void CMccRedEncoder::ConstructRedHeaders( TUint aCurTimeStamp )
+    {
+    DP_RED_ENCODE( "CMccRedEncoder::ConstructRedHeaders" )
+        
+    // Construct redundancy headers, final header is one byte long
+    iRedHeaders->Des().Zero();
+    const TUint8* seekPtr = iRedHeaders->Ptr();
+
+    TStreamEncoder streamEncoder;
+    streamEncoder.Initialize( const_cast<TUint8*>( seekPtr ), 0, 0 );
+    
+    // Encode headers except final header
+    if ( 1 < iRedTimeStamps.Count() )
+        {
+        iRedHeaders->Des().SetLength( 
+            iRedBlockCount * KRedHeaderSize + KFinalHeaderSize );
+        
+        for ( TInt i = 0; i < iRedBlockCount; i++ )
+            {
+            // F-bit            
+            streamEncoder.Encode( 1, KFBitLength );
+            // PT
+            streamEncoder.Encode( iPayloadTypes[KPrimaryEncPTInd], KPTFieldBits );
+            // Calculate timestamp offset
+            TUint offset = aCurTimeStamp - iRedTimeStamps[i];
+            // Timestamp offset
+            streamEncoder.Encode( offset, KTSOffsetBits );
+            // Block length
+            streamEncoder.Encode( iRedPayload->Data().Length(), KBlockLengthBits );
+            
+            DP_RED_ENCODE6( "ENC RED_HEADER NUM %d: F:%d PT:%d TIMESTAMP:%d, BL:%d", 
+                i, ETrue, iPayloadTypes[KPrimaryEncPTInd], iRedTimeStamps[i], 
+                iRedPayload->Data().Length() )
+            }    
+        }
+    else
+        {
+        iRedHeaders->Des().SetLength( KFinalHeaderSize );            
+        }            
+
+    // Encode final header
+    streamEncoder.Encode( 0, KFinalHeaderSize );
+    streamEncoder.Encode( iPayloadTypes[KPrimaryEncPTInd], KPTFieldBits );
+    
+    DP_RED_ENCODE5( "ENC FINAL RED_HEADER %d: F:%d PT:%d #TIMESTAMP#:%d",
+        iRedBlockCount, 0, iPayloadTypes[KPrimaryEncPTInd], aCurTimeStamp )
+    
+    // Delete oldest time stamp
+    if ( iRedTimeStamps.Count() > iRedBlockCount )
+        {
+        iRedTimeStamps.Remove( 0 );
+        }
+    }
+    
+
+// ========================== OTHER EXPORTED FUNCTIONS =========================
+
+
+//  End of File