author | hgs |
Fri, 14 May 2010 18:19:45 -0500 | |
changeset 20 | b67dd1fc57c5 |
parent 0 | 71ca22bcf22a |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004 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: Recognizer for AAC files. |
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* |
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*/ |
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|
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// INCLUDES |
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#include <f32file.h> |
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#include <barsread.h> |
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#include <implementationproxy.h> |
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#include "AACAudioPlayControllerRecognizer.h" |
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// LOCAL CONSTANTS AND MACROS |
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const TUid KUidMimeAacRecognizer = {0x101FAF96}; |
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const TInt KExtLength = 4; |
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_LIT(KDotAac, ".aac"); |
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_LIT8(KAacMimeType, "audio/aac"); |
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// ============================ MEMBER FUNCTIONS =============================== |
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// ----------------------------------------------------------------------------- |
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// CAACAudioPlayControllerRecognizer::CAACAudioPlayControllerRecognizer() |
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// C++ default constructor can NOT contain any code, that |
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// might leave. |
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// Call base constructor with the recognizer's UID and confidence level |
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// ----------------------------------------------------------------------------- |
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// |
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CAACAudioPlayControllerRecognizer::CAACAudioPlayControllerRecognizer() |
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: CApaDataRecognizerType(KUidMimeAacRecognizer, CApaDataRecognizerType::EHigh) |
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{ |
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// Set the number of data (MIME) types supported by this recognizer. |
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iCountDataTypes = 1; |
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} |
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// ----------------------------------------------------------------------------- |
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// CAACAudioPlayControllerRecognizer::ConstructL() |
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// Symbian 2nd phase constructor can leave. |
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// ----------------------------------------------------------------------------- |
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// |
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void CAACAudioPlayControllerRecognizer::ConstructL() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CAACAudioPlayControllerRecognizer::NewL() |
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// Two-phased constructor. |
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// ----------------------------------------------------------------------------- |
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// |
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CAACAudioPlayControllerRecognizer* CAACAudioPlayControllerRecognizer::NewL() |
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{ |
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#ifdef _DEBUG |
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RDebug::Print(_L("CAACAudioPlayControllerRecognizer::NewL")); |
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#endif |
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CAACAudioPlayControllerRecognizer* self = new (ELeave) CAACAudioPlayControllerRecognizer(); |
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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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// Destructor |
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CAACAudioPlayControllerRecognizer::~CAACAudioPlayControllerRecognizer() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CAACAudioPlayControllerRecognizer::SupportedDataTypeL |
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// Return the MimeType of the DataType depending on |
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// mime type of the file |
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// ----------------------------------------------------------------------------- |
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// |
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TDataType CAACAudioPlayControllerRecognizer::SupportedDataTypeL( |
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TInt aIndex ) const |
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{ |
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#ifdef _DEBUG |
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RDebug::Print(_L("CAACAudioPlayControllerRecognizer::SupportedDataTypeL [%d]"), aIndex); |
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#endif |
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TDataType dataType; |
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switch ( aIndex ) |
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{ |
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case 0: |
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dataType = TDataType(KAacMimeType); |
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break; |
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default: |
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User::Leave(KErrArgument); |
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break; |
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} |
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return dataType; |
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} |
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// ----------------------------------------------------------------------------- |
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// CAACAudioPlayControllerRecognizer::PreferredBufSize() |
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// Return the supposed minimum buffer size we need to |
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// successfully recognize the data |
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// ----------------------------------------------------------------------------- |
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// |
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TUint CAACAudioPlayControllerRecognizer::PreferredBufSize() |
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{ |
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return 0; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CAACAudioPlayControllerRecognizer::DoRecognizeL |
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// Attempt to recognize the data |
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// this recognizer only attempts to match the data and/or file suffix |
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// |
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// NB if the file is not recognized, this function should NOT leave : |
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// it should instead set iConfidence = ENotRecognized and return |
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// the function should only leave if there is an out-of-memory condition |
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// ----------------------------------------------------------------------------- |
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// |
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void CAACAudioPlayControllerRecognizer::DoRecognizeL( |
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const TDesC& aName, |
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const TDesC8& /*aBuffer*/ ) |
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{ |
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#ifdef _DEBUG |
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RDebug::Print(_L("CAACAudioPlayControllerRecognizer::DoRecognizeL: ")); |
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RDebug::RawPrint(aName); |
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RDebug::Print(_L(" ")); |
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#endif |
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// assume match will fail |
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iConfidence = CApaDataRecognizerType::ENotRecognized; |
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if ( aName.Length() < KExtLength ) |
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{ |
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#ifdef _DEBUG |
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RDebug::Print(_L("CAACAudioPlayControllerRecognizer::DoRecognizeL - Ext not present")); |
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#endif |
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return; |
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} |
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|
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if ( aName.Right( KDotAac.iTypeLength ).CompareF(KDotAac) == 0 ) |
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{ |
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#ifdef _DEBUG |
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RDebug::Print(_L("CAACAudioPlayControllerRecognizer::DoRecognizeL - Possible match!")); |
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#endif |
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iDataType = TDataType(KAacMimeType); |
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iConfidence = EProbable; |
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} |
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} |
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|
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// ========================== OTHER EXPORTED FUNCTIONS ========================= |
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|
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// ----------------------------------------------------------------------------- |
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// CApaDataRecognizerType* CreateRecognizerL() |
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// Used to create an instance of a CApaDataRecognizerType-derived class |
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// ----------------------------------------------------------------------------- |
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// |
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CApaDataRecognizerType* CAACAudioPlayControllerRecognizer::CreateRecognizerL() |
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{ |
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return new (ELeave) CAACAudioPlayControllerRecognizer (); |
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} |
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|
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const TImplementationProxy ImplementationTable[] = |
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{ |
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IMPLEMENTATION_PROXY_ENTRY(0x101FAFD7, CAACAudioPlayControllerRecognizer::CreateRecognizerL) |
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}; |
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|
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EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount) |
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{ |
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aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy); |
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return ImplementationTable; |
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} |
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|
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// End of file |