author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 14 May 2010 16:22:35 +0300 | |
changeset 16 | 43d09473c595 |
parent 12 | 5a06f39ad45b |
child 20 | b67dd1fc57c5 |
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: The functions in this module implements the specific behavior |
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* for the advanced audio converter class for configuration of |
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* hardware accelerated codec. |
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* |
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*/ |
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|
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|
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// INCLUDE FILES |
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#include "AMRAudioPlayControllerDecoder.h" |
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#include "DebugMacros.h" |
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//#include <AmrDecHwDeviceTICIM.h> |
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#include <MmfPanicCodes.h> |
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// The size of AMR header, header must include bits for determining frame length |
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const TInt KAmrFrameHeaderSize1 = 1; |
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// Frame length table (number of frame bytes) |
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const TInt KAmrFrameLength[16] = {13,14,16,18,20,21,27,32,6,0,0,0,0,0,0,1}; |
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// Maximum number of PCM samples in one AMR frame |
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const TInt KAmrSamplesPerFrame160 = 160; |
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const TInt KAmrSampleRate8K = 8000; |
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const TInt KAmrChannels1 = 1; |
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const TInt KAmrMaxFrameSize = 32; |
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const TUint KSizeOfInBuffer = 2*KAmrMaxFrameSize; |
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class TAudioFrameInfo |
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{ |
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public: |
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TInt iMode; // encoding mode |
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TInt iBitRate; // bitrate (bit/s) |
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TInt iSamplingRate; // sampling frequency (Hz) |
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TInt iChannels; // number of channels |
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TInt iFrameSize; // encoded size (bytes) |
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TInt iFrameSamples; // samples per frame |
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TInt iSamplingRateOut; // sampling frequency after conversion (Hz) |
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TInt iChannelsOut; // number of audio channels after conversion (1 or 2) |
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TInt iFrameSamplesOut; // decoded size after conversion (samples per frame) |
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TInt iPadding; // padding flag (TRUE or FALSE, TRUE if p slot exists) |
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TInt iId; // id of algorithm (1 MPEG-1, 0 MPEG-2) |
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}; |
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// ============================ MEMBER FUNCTIONS =============================== |
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// ----------------------------------------------------------------------------- |
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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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CAMRAudioPlayControllerDecoder::CAMRAudioPlayControllerDecoder() |
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: CAdvancedAudioDecoder(CActive::EPriorityStandard) |
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{ |
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DP0(_L("CAMRAudioPlayControllerDecoder::CAMRAudioPlayControllerDecoder - Hardware Accelerated")); |
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iMaxFrameSize = KAmrMaxFrameSize; |
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iSizeOfInBuffer = KSizeOfInBuffer; |
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} |
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// ----------------------------------------------------------------------------- |
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// CAMRAudioPlayControllerDecoder::ConstructL |
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// Symbian 2nd phase constructor can leave. |
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// ----------------------------------------------------------------------------- |
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// |
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void CAMRAudioPlayControllerDecoder::ConstructL() |
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{ |
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DP1(_L("CAMRAudioPlayControllerDecoder::ConstructL"), this); |
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iFrameTable = CFrameTable::NewL(); |
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RenderEnable(); |
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UnMarkPlayEnd(); |
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Enable(); |
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CActiveScheduler::Add(this); |
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} |
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// ----------------------------------------------------------------------------- |
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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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CAMRAudioPlayControllerDecoder* CAMRAudioPlayControllerDecoder::NewL() |
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{ |
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DP0(_L("CAMRAudioPlayControllerDecoder::NewL")); |
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CAMRAudioPlayControllerDecoder* self = new(ELeave) CAMRAudioPlayControllerDecoder(); |
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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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104 |
|
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105 |
// Destructor |
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CAMRAudioPlayControllerDecoder::~CAMRAudioPlayControllerDecoder() |
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107 |
{ |
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DP0(_L("CAMRAudioPlayControllerDecoder::~CAMRAudioPlayControllerDecoder")); |
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delete iFrameTable; |
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} |
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111 |
|
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TInt CAMRAudioPlayControllerDecoder::CodecConfig(RArray<TInt>& /*aConfigData*/) |
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113 |
{ |
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TInt status = KErrNone; |
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iFrameTable->InitFrameTable(KAmrSampleRate8K, KAmrSamplesPerFrame160); |
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return status; |
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} |
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118 |
|
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// ----------------------------------------------------------------------------- |
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// CAMRAudioPlayControllerDecoder::ResetL |
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// Resets configuration data and configures the codec. |
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// ----------------------------------------------------------------------------- |
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// |
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void CAMRAudioPlayControllerDecoder::ResetL() |
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125 |
{ |
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DP0(_L ("CAMRAudioPlayControllerDecoder::Reset - Enter")); |
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127 |
|
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delete[] iOutBuffer; |
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delete[] iInBuffer; |
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130 |
|
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iInBuffer = NULL; |
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iOutBuffer = NULL; |
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iInBufferCount = 0; |
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iOutBufferCount = 0; |
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iOutBufferPtr = NULL; |
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iOutFrameLength = KAmrMaxFrameSize; // since data is not decoded |
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iInBuffer = new (ELeave) TUint8[KSizeOfInBuffer]; |
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138 |
|
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iOutBuffer = new (ELeave) TUint8[iOutFrameLength]; |
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iOutBufferPtr = iOutBuffer; |
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141 |
|
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iAccLen = 0; |
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143 |
|
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DP0(_L ("CAMRAudioPlayControllerDecoder::Reset - Exit")); |
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145 |
} |
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146 |
|
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TCodecProcessResult CAMRAudioPlayControllerDecoder::ProcessL(CMMFBuffer& aSrc, CMMFBuffer& aDst) |
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148 |
{ |
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DP0(_L ("CAMRAudioPlayControllerDecoder::ProcessL")); |
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return CAdvancedAudioDecoder::ProcessHwL(aSrc, aDst); |
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151 |
} |
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152 |
|
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TInt CAMRAudioPlayControllerDecoder::FrameLength(const TUint8* aBuf, TInt aBufLen, TInt& aFrameLength) |
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154 |
{ |
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TInt stat = KErrNone; |
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TAudioFrameInfo info; |
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TInt len = FrameInfo(aBuf, aBufLen, info); |
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if (len > 0) |
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159 |
{ |
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aFrameLength = len; |
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161 |
} |
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162 |
else |
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163 |
{ |
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stat = KErrUnknown; |
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165 |
} |
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return stat; |
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167 |
} |
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168 |
|
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169 |
TInt CAMRAudioPlayControllerDecoder::FrameInfo( |
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const TUint8* aBuf, |
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TInt aBufLen, |
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TAudioFrameInfo& aInfo) |
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173 |
{ |
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TInt length = 0; |
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aInfo.iBitRate = 0; |
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if (aBufLen >= KAmrFrameHeaderSize1) |
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177 |
{ |
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// extract mode information |
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const TInt mode = (aBuf[0] & 0x78) >> 3; // 1st byte 0b.MODE... |
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// get length |
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length = KAmrFrameLength[mode]; |
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182 |
|
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// check start stuffing bits |
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if ((aBuf[0] & 0x83) != 0) |
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185 |
{ |
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length = 0; // syntax error |
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187 |
} |
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188 |
|
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189 |
// SKIP CHECKING FOR STUFFING BITS |
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190 |
/* |
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191 |
// check end stuffing bits |
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192 |
if (length > 0 && aBufLen >= length) |
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193 |
{ |
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194 |
TUint32 stuffBits = aBuf[length-1]; |
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stuffBits <<= (11 - KAmrStuffLength[mode]); |
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if ((stuffBits & 0x0000FF) != 0) |
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197 |
{ |
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198 |
length = 0; // syntax error |
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199 |
} |
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200 |
} |
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201 |
*/ |
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202 |
// update frame parameters |
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203 |
aInfo.iMode = mode; |
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aInfo.iBitRate = length * 400; |
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205 |
aInfo.iSamplingRate = KAmrSampleRate8K; |
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206 |
aInfo.iChannels = KAmrChannels1; |
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207 |
aInfo.iFrameSize = length; |
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208 |
aInfo.iFrameSamples = KAmrSamplesPerFrame160; |
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aInfo.iSamplingRateOut = aInfo.iSamplingRate; |
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aInfo.iChannelsOut = aInfo.iChannels; |
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aInfo.iFrameSamplesOut= aInfo.iFrameSamples; |
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} |
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return length; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CAMRAudioControllerUtility::SeekSync |
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// ----------------------------------------------------------------------------- |
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// |
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TInt CAMRAudioPlayControllerDecoder::SeekSync(TUint8* aBuf, TInt aBufLen) |
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{ |
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const TInt KMaxFrames = 3; // number of frames to check |
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const TInt KNotFound = aBufLen; // sync not found position |
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TAudioFrameInfo frameInfo; // frame parameters |
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TInt i = 0; |
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TInt syncPos = KNotFound; |
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TInt maxSeek = KMaxFrames; |
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const TUint8* endPtr = aBuf + aBufLen; |
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|
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// Seek a valid frame candidate byte by byte until a valid frame |
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// is found or all bytes have been checked. |
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while (aBuf < endPtr && syncPos == KNotFound) |
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{ |
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TInt seekCount = 0; |
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const TUint8* framePtr = aBuf; |
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TInt frameBufLen = aBufLen; |
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syncPos = i; |
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// Check the validity of this frame candidate and the nearest next |
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// frames. If they are not OK, syncPos will be set to KNotFound. |
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while (framePtr < endPtr && syncPos != KNotFound && seekCount < maxSeek) |
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{ |
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TInt length = FrameInfo(framePtr, frameBufLen, frameInfo); |
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if (frameBufLen >= KAmrFrameHeaderSize1 && length == 0) |
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{ |
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syncPos = KNotFound; |
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} |
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framePtr += length; |
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frameBufLen -= length; |
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seekCount++; |
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} |
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aBuf++; aBufLen--; i++; |
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} |
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return syncPos; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CAMRAudioPlayControllerDecoder::IsHwAccelerated |
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// Always return true when no soft codec is used. |
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// ----------------------------------------------------------------------------- |
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// |
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TBool CAMRAudioPlayControllerDecoder::IsHwAccelerated() |
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{ |
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return ETrue; |
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} |
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|
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TInt CAMRAudioPlayControllerDecoder::CodecCmd(TCodecCmd /*aCmd*/) |
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{ |
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return KErrNotSupported; |
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} |
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|
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|
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// End of file |