--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dvrengine/CommonRecordingEngine/DvrRtpUtils/src/CRtpPacket.cpp	Thu Dec 17 09:14:38 2009 +0200
@@ -0,0 +1,207 @@
+/*
+* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "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:    Class to RTP packet parsing.*
+*/
+
+
+
+
+// INCLUDE FILES
+#include "CRtpPacket.h"
+
+// CONSTANTS
+const TInt KRtpPacketVersion( 2 );
+const TInt KRtpMinHeaderLength( 12 );
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CRtpPacket* CRtpPacket::NewL()
+    {
+    CRtpPacket* self = CRtpPacket::NewLC();
+    CleanupStack::Pop();
+    return self;
+    }
+    
+// -----------------------------------------------------------------------------
+// CRtpPacket::NewLC
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CRtpPacket* CRtpPacket::NewLC()
+    {
+    CRtpPacket* self = new( ELeave ) CRtpPacket();
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::CRtpPacket
+// C++ default constructor can NOT contain any code, that might leave.
+// -----------------------------------------------------------------------------
+//
+CRtpPacket::CRtpPacket() : iPayload( NULL, 0 )
+    {
+    // None
+    }
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CRtpPacket::ConstructL()
+    {
+    // None
+    }
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::CRtpPacket
+// Destructor.
+// -----------------------------------------------------------------------------
+//
+EXPORT_C CRtpPacket::~CRtpPacket()
+    {
+    if ( iRtpRecvHeader.iHeaderExtension )
+        {
+        // Remove iData
+        delete[] ( iRtpRecvHeader.iHeaderExtension )->iData;
+        delete iRtpRecvHeader.iHeaderExtension;
+        }
+    
+    if ( iRtpRecvHeader.iCsrcList )
+        {
+        delete[] iRtpRecvHeader.iCsrcList;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::ParseRtcp
+// 
+// -----------------------------------------------------------------------------
+//
+EXPORT_C TInt CRtpPacket::ParseRtp( const TDesC8& aPktBuf )
+    {
+    if ( aPktBuf.Length() < KRtpMinHeaderLength )
+        {
+        SetTimeStamp( 0 );
+        iPayload.Set( NULL, 0 );
+        return KErrUnderflow;
+        }
+    
+    // 1st byte
+    TInt byte( 0 );
+    TUint8 version_flag( ( aPktBuf[byte] & 0xc0 ) >> 6 );
+    // v=2 is mandatory 
+    if ( version_flag != KRtpPacketVersion ) 
+        {
+        SetTimeStamp( 0 );
+        iPayload.Set( NULL, 0 );
+        return KErrNotSupported;
+        } 
+        
+    iRtpRecvHeader.iPadding = ( aPktBuf[byte] >> 5 ) & 1;
+    iRtpRecvHeader.iExtension = ( aPktBuf[byte] >> 4 ) & 1;
+    iRtpRecvHeader.iCsrcCount = aPktBuf[byte++] & 0xf;
+    
+    // 2nd byte
+    iRtpRecvHeader.iMarker = ( aPktBuf[byte] >> 7 ) & 1;
+    iRtpRecvHeader.iPayloadType = aPktBuf[byte++] & 0x7f;
+    
+    // 3rd - 4th bytes
+    TUint16 seq_no( aPktBuf[byte++] << 8 );
+    seq_no |= aPktBuf[byte++];
+    iRtpRecvHeader.iSeqNum = seq_no;
+    
+    // 5th - 8th bytes
+    TUint32 timestamp( Read32Bits( aPktBuf, byte ) );
+    iRtpRecvHeader.iTimestamp = timestamp;
+
+    // 9th - 12th bytes
+    TInt32 ssrc( Read32Bits( aPktBuf, byte ) );
+    
+    // 13th - bytes (optional)
+    // total len = 4 * csrc_len (bytes)
+    if ( iRtpRecvHeader.iCsrcCount > 0 )
+        {
+        iRtpRecvHeader.iCsrcList = new TUint32[iRtpRecvHeader.iCsrcCount];
+        //TInt32* csrc = new TInt32[csrc_len];
+        for ( TInt i( 0 ); i < iRtpRecvHeader.iCsrcCount; i++ )
+            {
+            iRtpRecvHeader.iCsrcList[i] = Read32Bits( aPktBuf, byte );
+            }
+        }
+
+    // optional extension field
+    if ( iRtpRecvHeader.iExtension == 1 )
+        {
+        /*
+        iRtpRecvHeader.iHeaderExtension = new TRtpHeaderExtension();
+        // 16 bits
+        TInt16 op_code( aPktBuf[byte++] << 8 );
+        op_code |= aPktBuf[byte++];
+        iRtpRecvHeader.iHeaderExtension->iType = op_code;
+        
+        // 16 bits
+        TInt16 op_code_data_length = aPktBuf[byte++] << 8;
+        op_code_data_length |= aPktBuf[byte++];
+        iRtpRecvHeader.iHeaderExtension->iLength = op_code_data_length;
+        
+        op_code_data_length * 4 bytes of extension data
+        op_code_data = new TInt32[op_code_data_length];
+        iRtpRecvHeader.iHeaderExtension->iData = new TInt32[op_code_data_length];
+        for ( TInt i( 0 ); i < op_code_data_length; i++ )
+            {
+            iRtpRecvHeader.iHeaderExtension)->iData[i] = Read32Bits( aPktBuf, byte );
+            }
+        */
+        }
+    
+    // The rest is payload data
+    iPayload.Set( aPktBuf.Mid( byte ) );
+    
+    return KErrNone;
+    }
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::SetTimeStamp
+// 
+// -----------------------------------------------------------------------------
+//
+EXPORT_C void CRtpPacket::SetTimeStamp( const TUint32 aTs )
+    {
+    iRtpRecvHeader.iTimestamp = aTs;
+    }
+
+// -----------------------------------------------------------------------------
+// CRtpPacket::Read32Bits
+// 
+// -----------------------------------------------------------------------------
+//
+TUint CRtpPacket::Read32Bits( const TPtrC8& aPktBuf, TInt& aByte )
+    {
+    TUint ret( ( ( TUint )( aPktBuf[aByte++] ) ) << 24 );
+    ret |= ( ( TUint )( aPktBuf[aByte++] ) ) << 16;
+    ret |= ( ( TUint )( aPktBuf[aByte++] ) ) << 8;
+    ret |= ( ( TUint )( aPktBuf[aByte++] ) );
+    
+    return ret;
+    }
+
+// End of File