author | vnuitven <> |
Mon, 06 Sep 2010 18:50:40 +0530 | |
branch | rcs |
changeset 50 | 1d8943dd8be6 |
parent 0 | 1bce908db942 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2004-2006 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: Formatter classes for encoding/decoding of RTP payload format |
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* for AMR ( narrow band ) and AMR-WB ( wide band ) audio codecs. |
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* |
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*/ |
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#ifndef AMRPAYLOADFORMATTER_H |
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#define AMRPAYLOADFORMATTER_H |
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// INCLUDES |
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#include <e32base.h> |
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#include "amrpayloadformatutil.h" |
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#include "mccinternalevents.h" |
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#include "amrframe.h" |
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#ifdef FTD_ENABLED |
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#include <e32msgqueue.h> |
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#include "MccCodecStats.h" |
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#include "MccJBufferStats.h" |
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#endif |
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#ifdef _DEBUG |
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#include <e32svr.h> |
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#define _DEBUG_AMR_DECODE |
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#define _DEBUG_AMR_ENCODE |
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#define TRACE_AMR_PAYLOAD_FORMAT_READ |
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#define TRACE_AMR_PAYLOAD_FORMAT_WRITE |
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#define TRACE_PAYLOAD_FORMAT |
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#endif |
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// CONSTANTS |
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const TUint KAmrNbSampleRate = 8000; |
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const TUint KAmrWbSampleRate = 16000; |
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const TUint KCMRFieldBits = 4; |
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// Max two frames is used with AMR FEC redundancy |
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const TInt KMaxAmrRedCount = 5; |
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// Max number of frames to save for redundancy detection |
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const TInt KMaxAmrFramesSaved = 5; |
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// How many octets are compared while determining is a frame already received |
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const TInt KMaxCompareOctets = 6; |
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const TInt KMaxChannelCount = 2; |
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const TInt KMaxFrameBlocksPerPacket = 20; |
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const TInt KMaxFrameCountPerPacket |
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= KMaxChannelCount * ( KMaxFrameBlocksPerPacket + KMaxAmrRedCount ); |
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const TInt KHeaderBitsBE = 4; |
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const TInt KHeaderBitsOA = 8; |
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const TInt KTOCFieldBitsBE = 6; |
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const TInt KTOCFieldBitsOA = 8; |
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const TInt KNumberOfNbModes = 8; |
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// In bytes; equals to |
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// [( KMaxFrameCountPerPacket * maximum-frame-size ) + header + TOC + CRC] |
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// in octet-aligned mode maximum-frame-size = 31 ( AMR-NB ); header = 1; |
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// TOC = CRC = KMaxFrameCountPerPacket |
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// Refer to 3GPP TS 26.101 V5.0.0 and RFC 3267 |
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// the total number of bits in speech data for different AMR frame types |
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// total speech |
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// Index Mode bits |
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// ---------------------------- |
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// 0 AMR 4.75 95 |
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// 1 AMR 5.15 103 |
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// 2 AMR 5.9 118 |
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// 3 AMR 6.7 134 |
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// 4 AMR 7.4 148 |
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// 5 AMR 7.95 159 |
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// 6 AMR 10.2 204 |
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// 7 AMR 12.2 244 |
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// 8 AMR SID 39 |
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const TInt KNumberOfNbFrameTypes = 9; |
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const TInt KAmrNbTotalSpeechBits[KNumberOfNbFrameTypes] = |
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{95, 103, 118, 134, 148, 159, 204, 244, 39}; |
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const TInt KMaxBitsLength = 32; // max length in bits that TStreamFormatter |
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// can handle once when encoding and decoding |
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const TInt KAmrNbModes[KNumberOfNbModes] = |
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{4750, 5150, 5900, 6700, 7400, 7950, 10200, 12200}; |
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100 |
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const TInt KNumberOfWbModes = 9; |
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// Refer to 3GPP TS 26.201 V7.0.0 and RFC 3267 |
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103 |
// the total number of bits in speech data for different AMR frame types |
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// total speech |
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// Index Mode bits |
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// ---------------------------- |
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// 0 AMR-WB 6.60 132 |
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// 1 AMR-WB 8.85 177 |
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// 2 AMR-WB 12.65 253 |
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// 3 AMR-WB 14.25 285 |
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// 4 AMR-WB 15.85 317 |
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// 5 AMR-WB 18.25 365 |
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// 6 AMR-WB 19.85 397 |
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// 7 AMR-WB 23.05 461 |
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// 8 AMR-WB 23.85 477 |
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// 9 AMR-WB SID 40 |
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117 |
|
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const TInt KNumberOfWbFrameTypes = 10; |
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const TInt KAmrWbTotalSpeechBits[KNumberOfWbFrameTypes] = |
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{132, 177,253, 285, 317, 365, 397, 461, 477, 40}; |
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const TInt KAmrWbModes[KNumberOfWbModes] = |
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{6600, 8850, 12650, 14250, 15850, 18250, 19850, 23050, 23850}; |
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123 |
|
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// MACROS |
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#ifdef _DEBUG_AMR_DECODE |
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#define DP_AMR_DECODE(a) { _LIT( KName, a); RDebug::Print(KName); } |
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#define DP_AMR_DECODE2(a, b) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b); } |
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#define DP_AMR_DECODE3(a, b, c) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c); } |
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#define DP_AMR_DECODE4(a, b, c, d) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d); } |
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#define DP_AMR_DECODE5(a, b, c, d, e) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d, e); } |
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#define DP_AMR_DECODE6(a, b, c, d, e, f) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d, e, f); } |
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#else |
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#define DP_AMR_DECODE(a); |
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#define DP_AMR_DECODE2(a, b); |
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#define DP_AMR_DECODE3(a, b, c); |
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#define DP_AMR_DECODE4(a, b, c, d); |
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#define DP_AMR_DECODE5(a, b, c, d, e); |
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#define DP_AMR_DECODE6(a, b, c, d, e, f); |
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#endif |
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145 |
|
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#ifdef _DEBUG_AMR_ENCODE |
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#define DP_AMR_ENCODE(a) { _LIT( KName, a); RDebug::Print(KName); } |
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#define DP_AMR_ENCODE2(a, b) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b); } |
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#define DP_AMR_ENCODE3(a, b, c) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c); } |
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#define DP_AMR_ENCODE4(a, b, c, d) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d); } |
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#define DP_AMR_ENCODE5(a, b, c, d, e) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d, e); } |
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#define DP_AMR_ENCODE6(a, b, c, d, e, f) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d, e, f); } |
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#define DP_AMR_ENCODE7(a, b, c, d, e, f, g) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d, e, f, g); } |
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#else |
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#define DP_AMR_ENCODE(a); |
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#define DP_AMR_ENCODE2(a, b); |
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#define DP_AMR_ENCODE3(a, b, c); |
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#define DP_AMR_ENCODE4(a, b, c, d); |
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#define DP_AMR_ENCODE5(a, b, c, d, e); |
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#define DP_AMR_ENCODE6(a, b, c, d, e, f); |
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#define DP_AMR_ENCODE7(a, b, c, d, e, f, g); |
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#endif |
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|
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#ifdef TRACE_AMR_PAYLOAD_FORMAT_READ |
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#define AMR_PAYLOAD_FORMAT_READ(a) \ |
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{ _LIT( KName, a); RDebug::Print(KName); } |
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#define AMR_PAYLOAD_FORMAT_READ2(a, b) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b); } |
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#define AMR_PAYLOAD_FORMAT_READ3(a, b, c) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c); } |
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#define AMR_PAYLOAD_FORMAT_READ4(a, b, c, d) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d); } |
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#define AMR_PAYLOAD_FORMAT_READ5(a, b, c, d, e) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d, e); } |
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#else |
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#define AMR_PAYLOAD_FORMAT_READ(a); |
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#define AMR_PAYLOAD_FORMAT_READ2(a, b); |
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#define AMR_PAYLOAD_FORMAT_READ3(a, b, c); |
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#define AMR_PAYLOAD_FORMAT_READ4(a, b, c, d); |
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#define AMR_PAYLOAD_FORMAT_READ5(a, b, c, d, e) |
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#endif |
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|
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#ifdef TRACE_AMR_PAYLOAD_FORMAT_WRITE |
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#define AMR_PAYLOAD_FORMAT_WRITE(a) \ |
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{ _LIT( KName, a); RDebug::Print(KName); } |
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#define AMR_PAYLOAD_FORMAT_WRITE2(a, b) \ |
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{ _LIT(KName, a);RDebug::Print(KName, b); } |
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#define AMR_PAYLOAD_FORMAT_WRITE3(a, b, c) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c); } |
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#define AMR_PAYLOAD_FORMAT_WRITE4(a, b, c, d) \ |
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{ _LIT(KName, a); RDebug::Print(KName, b, c, d); } |
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#else |
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#define AMR_PAYLOAD_FORMAT_WRITE(a) |
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#define AMR_PAYLOAD_FORMAT_WRITE2(a, b) |
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#define AMR_PAYLOAD_FORMAT_WRITE3(a, b, c) |
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#define AMR_PAYLOAD_FORMAT_WRITE4(a, b, c, d) |
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#endif |
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#ifdef TRACE_PAYLOAD_FORMAT |
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#define TRACE_PAYLOAD_FORMAT_PRINT(a) \ |
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{ _LIT( KName, a); RDebug::Print(KName); } |
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#else |
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#define TRACE_PAYLOAD_FORMAT_PRINT(a) |
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#endif |
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// DATA TYPES |
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// CLASS DECLARATION |
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/** |
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* The AMR payload formatter for an RTP packet. |
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* |
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* @lib <TBD> |
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* @since Series-60 2.1 |
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*/ |
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class CAmrPayloadFormatter : public CBase |
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{ |
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public: // Constructors and destructor |
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/** |
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* Destructor. |
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*/ |
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virtual ~CAmrPayloadFormatter( ); |
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public: // New functions |
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/** |
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* Initializes AMR encoder/decoder. Initialization must be done when playback |
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* is started. |
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* @since Series 60 3.0 |
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*/ |
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void Initialize(); |
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/** |
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* Set payload buffer. |
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* Calling function must have allocated memory for the buffer. |
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* @since Series-60 2.1 |
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* @param aBuffer - [input] Descriptor of payload buffer |
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* @return None |
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*/ |
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virtual void SetPayloadBuffer( TDes8& aBuffer ); |
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/** |
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* Set number of audio channels. |
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* @since Series-60 2.1 |
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* @param aChannelCount - [input] Number of audio channels |
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* @return TInt - KErrNone if successful; system wide error code otherwise |
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*/ |
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virtual TInt SetChannelCount( TInt aChannelCount ); |
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/** |
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* Set number of AMR frame blocks included in one RTP packet. |
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* Each frame block contains frames for all audio channels. |
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* @since Series-60 2.1 |
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* @param aFrameblockCount - [input] Number of AMR frame blocks included |
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* in one RTP packet |
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* @return TInt - KErrNone if successful; system wide error code otherwise |
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*/ |
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virtual TInt SetFrameBlockCount( TInt aFrameblockCount ); |
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/** |
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* Get the payload buffer. |
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* @since Series-60 2.1 |
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* @return TDes8& - Descriptor of payload buffer |
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*/ |
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inline TDes8& PayloadBuffer( ) { return iPayloadPtr; }; |
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/** |
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* Get number of speech bits in an AMR frame |
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* @since Series-60 2.1 |
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* @param aFrameType - [input] AMR frame type |
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* @return TInt - Number of speech bits in an AMR frame |
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*/ |
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TInt SpeechBitCount( enum TAmrFrameType aFrameType ) const; |
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/** |
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* Get number of audio channels. |
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* @since Series-60 2.1 |
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* @return TInt - Number of audio channels |
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*/ |
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inline TInt ChannelCount( ) const { return iChannelCount; }; |
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/** |
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* Get number of AMR frame blocks included in one RTP packet. |
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* Each frame block contains frames for all audio channels. |
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* @since Series-60 2.1 |
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* @return TInt - Number of AMR frame blocks |
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*/ |
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inline TInt FrameBlockCount( ) const { return iFrameBlockCount; }; |
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/** |
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* Get number of AMR frame included in one RTP packet. |
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* @since Series-60 2.1 |
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* @return TInt - Number of AMR frames |
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*/ |
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inline TInt FrameCount( ) const { return iFrameCount; }; |
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protected: // Functions |
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/** |
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* Constructor. |
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*/ |
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CAmrPayloadFormatter( TBool aIsNb ); |
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virtual void DoInitialize() = 0; |
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protected: // Data |
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// TRUE, if this is formater for narrow band AMR. FALSE for wide band. |
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TBool iIsNb; |
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// Payload parameters |
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// Number of audio channels |
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TInt iChannelCount; |
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// Number of AMR frame blocks included in one packet |
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TInt iFrameBlockCount; |
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// Number of AMR frames included in one packet |
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TInt iFrameCount; |
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// Codec mode request |
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TAmrModeRequest iModeRequest; |
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// Frame information |
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// AMR frames for one RTP packet |
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TAmrFrame iFrames[KMaxFrameCountPerPacket]; |
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// Current index to `iFrames' array |
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TInt iFrameIndex; |
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// Payload data buffer info |
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// Pointer descriptor for payload buffer |
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TPtr8 iPayloadPtr; |
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// Pointer to payload buffer |
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TUint8* iPayload; |
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// Size, in bytes, of payload buffer |
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TInt iPayloadSize; |
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// Frames either for redundancy detection or redundancy sending |
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RPointerArray<HBufC8> iFrameDatas; |
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#ifdef FTD_ENABLED |
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// Message queue carrying codec statistics |
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RMsgQueue<TMccCodecStats> iCodecStatsQueue; |
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// Message queue carrying jitter buffer statistics |
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RMsgQueue<TMccJBufferStats> iJBufStatsQueue; |
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#endif |
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}; |
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#endif // __AMRPAYLOADFORMATTER_H |
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// End of File |