author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:04:58 +0200 | |
changeset 0 | 1bce908db942 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 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: PayloadFormat plugin capable to read RTP payload containing |
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* Amr audio. |
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* |
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*/ |
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// INCLUDE FILES |
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#include "amrpayloadencoderoa.h" |
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#include "amrpayloadheaderoa.h" |
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#include "amrtocentryoa.h" |
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// ============================ MEMBER FUNCTIONS ============================= |
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoderOA::CAmrPayloadEncoderOA |
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// C++ default constructor can NOT contain any code, that |
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// might leave. |
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// --------------------------------------------------------------------------- |
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// |
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CAmrPayloadEncoderOA::CAmrPayloadEncoderOA( TBool aIsNb ) |
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: CAmrPayloadEncoder( aIsNb ) |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::CAmrPayloadEncoderOA" ); |
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CAmrPayloadEncoderOA::InitializeFrameEncoder( ); |
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} |
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoderOA::ConstructL |
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// Symbian 2nd phase constructor can leave. |
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// --------------------------------------------------------------------------- |
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// |
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void CAmrPayloadEncoderOA::ConstructL() |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::ConstructL" ); |
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// Allocate memory for iHeaderEncoder and iTocEntryEncoder and set them |
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// to NULL to avoid codescanner errors |
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delete iHeaderEncoder; |
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iHeaderEncoder = NULL; |
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delete iTocEntryEncoder; |
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iTocEntryEncoder = NULL; |
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iHeaderEncoder = CAmrPayloadHeaderOA::NewL(); |
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iTocEntryEncoder = CAmrTocEntryOA::NewL(); |
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} |
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoder::NewL |
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// Two-phased constructor. |
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// --------------------------------------------------------------------------- |
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// |
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CAmrPayloadEncoderOA* CAmrPayloadEncoderOA::NewL( TBool aIsNb ) |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::NewL" ); |
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CAmrPayloadEncoderOA* self = new( ELeave ) CAmrPayloadEncoderOA( aIsNb ); |
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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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// CAmrPayloadEncoderOA::~CAmrPayloadEncoderOA |
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// Destructor |
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// --------------------------------------------------------------------------- |
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// |
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CAmrPayloadEncoderOA::~CAmrPayloadEncoderOA() |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::~CAmrPayloadEncoderOA" ); |
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} |
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoderOA::EncodeFrame |
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// Encode a received Amr frame into the payload buffer. |
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// --------------------------------------------------------------------------- |
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// |
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TBool CAmrPayloadEncoderOA::EncodeFrame( TInt aChannel, |
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TAmrFrameType aFrameType, |
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TUint8 aFrameQualityInd, |
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const TDes8& aFrameData ) |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::EncodeFrame" ); |
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|
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TBool ret = CAmrPayloadEncoder::EncodeFrame( aChannel, aFrameType, |
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aFrameQualityInd, aFrameData ); |
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if ( EFalse == ret ) |
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{ |
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// Encoding a frame data only. Payload Header and TOCs haven't been filled |
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// Padding frame data to Byte boundary. |
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if ( iFrameEncoder.BitIndex( ) != 0 ) |
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{ |
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iFrameEncoder.Encode( 0, ( KBitsIn1Byte - iFrameEncoder.BitIndex( ) ) ); |
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} |
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} |
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else |
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{ |
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InitializeFrameEncoder(); |
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} |
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|
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return ret; |
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} |
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|
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|
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoderOA::SetChannelCount |
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// Set number of audio channels. |
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// --------------------------------------------------------------------------- |
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// |
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TInt CAmrPayloadEncoderOA::SetChannelCount( TInt aChannelCount ) |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::SetChannelCount" ); |
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|
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TInt ret = CAmrPayloadFormatter::SetChannelCount( aChannelCount ); |
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InitializeFrameEncoder( ); |
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return ret; |
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} |
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141 |
|
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|
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoderOA::SetFrameBlockCount |
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// Set number of Amr frame blocks included in one RTP packet. |
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// --------------------------------------------------------------------------- |
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// |
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TInt CAmrPayloadEncoderOA::SetFrameBlockCount( TInt aFrameblockCount ) |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::SetFrameBlockCount" ); |
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|
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TInt ret = CAmrPayloadFormatter::SetFrameBlockCount( aFrameblockCount ); |
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InitializeFrameEncoder(); |
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return ret; |
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} |
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|
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|
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// --------------------------------------------------------------------------- |
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// CAmrPayloadEncoderOA::InitializeFrameEncoder |
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// Initialize frame encoder ( Stream Encoder ). Starting position of first |
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// AMR frame data is calculated. Refer to RFC3267 4.4. |
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// --------------------------------------------------------------------------- |
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// |
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void CAmrPayloadEncoderOA::InitializeFrameEncoder() |
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{ |
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DP_AMR_ENCODE( "CAmrPayloadEncoderOA::InitializeFrameEncoder" ); |
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|
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// Total number of TOCs: iFrameCount = iChannelCount * iFrameBlockCount |
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// In OA mode, Bit Index always equals to Zero. |
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TInt numOfRedFrames( 0 ); |
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if ( iRedIntervalCollected ) |
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{ |
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numOfRedFrames = iFrameDatas.Count(); |
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} |
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|
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TInt frameByteIndex = ( KHeaderBitsOA |
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+ KTOCFieldBitsOA * ( iFrameCount + numOfRedFrames ) ) / KBitsIn1Byte; |
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|
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iFrameEncoder.Initialize( iPayload, frameByteIndex, 0 ); |
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} |