author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 23:18:32 +0200 | |
branch | RCL_3 |
changeset 8 | bee149131e4b |
parent 0 | a2952bb97e68 |
child 14 | f56ec6ce2732 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 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: Enumerator objects |
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* |
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*/ |
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#ifndef CMEDIAMTPDATAPROVIDERENUMERATOR_H |
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#define CMEDIAMTPDATAPROVIDERENUMERATOR_H |
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#include <e32base.h> |
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#include <d32dbms.h> |
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#include "mmmtpenumerationcallback.h" |
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#include "cmmmtpdpperflog.h" |
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// Forward declarations |
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class MMTPDataProviderFramework; |
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class MMTPObjectMgr; |
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class CMTPObjectMetaData; |
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class CMediaMtpDataProvider; |
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/** |
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* Defines file enumerator. Enumerates all files/directories under a |
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* specified path or storage |
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*/ |
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class CMediaMtpDataProviderEnumerator: public CActive |
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{ |
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public: |
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/** |
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* Two phase constructor |
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* @param aFramework Reference to MMTPDataProviderFramework |
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* @param aDataProvider Reference to CMediaMtpDataProvider |
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* @return A pointer to a new instance of the object |
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*/ |
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static CMediaMtpDataProviderEnumerator* NewL( MMTPDataProviderFramework& aFramework, |
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CMediaMtpDataProvider& aDataProvider ); |
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/** |
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* destructor |
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*/ |
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~CMediaMtpDataProviderEnumerator(); |
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/** |
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* Kick off the enumeration on the specified storage |
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* @param aStorageId storage to be enumerated |
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*/ |
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void StartL( TUint32 aStorageId ); |
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// introduce to cleanup db at close session |
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void SessionClosedL(); |
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protected: |
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// from CActive |
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/** |
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* Cancel the enumeration process |
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*/ |
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void DoCancel(); |
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void RunL(); |
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/** |
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* Ignore the error, continue with the next one |
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*/ |
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TInt RunError( TInt aError ); |
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private: |
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/** |
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* Standard C++ Constructor |
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* @param aFramework Reference to MMTPDataProviderFramework |
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* @param aDataProvider Reference to CMediaMtpDataProvider |
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*/ |
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CMediaMtpDataProviderEnumerator( MMTPDataProviderFramework& aFramework, |
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CMediaMtpDataProvider& aDataProvider ); |
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void ConstructL(); |
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/** |
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* Called when the enumeration is completed |
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*/ |
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void SignalCompleteL( MMTPEnumerationCallback& aCallback, |
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TInt aError = KErrNone ); |
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void ScanStorageL( TUint32 aStorageId ); |
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/** |
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* Scan next storage |
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*/ |
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void ScanNextStorageL(); |
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/** |
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* Scans directory at aPath recursing into subdirectories on a depth |
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* first basis. |
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* |
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* Directory entries are kept in iDirStack - which is a LIFO stack. |
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* The current path, needed since TEntries don't keep track of it, |
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* is kept in iPath. |
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* |
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* The algorithm works as follows: |
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* |
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* 1. Read directory entries. |
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* 2. ProcessEntriesL is called if no error occurs and >= 1 entries are |
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* read. |
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* 3. ProcessEntriesL adds entries to database, if entry is directory |
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* add to iDirStack. |
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* 4. When all entries are processed pop entry off the dirstack, |
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* if entry is empty TEntry remove one directory from iPath. |
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* 5. Append entry name onto iPath - to update path with new depth |
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* (parent/subdir). |
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* 6. Push an empty TEntry onto iDirStack - this tells us we have |
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* recursed one, think of it as pushing the '\' separator onto |
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* iDirStack. |
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* 7. Repeat 1-7 until iDirStack is empty. |
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*/ |
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void ScanDirL(); |
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|
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/** |
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* Recurse into the next directory on the stack |
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* and scan it for entries. |
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*/ |
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void ScanNextDirL(); |
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|
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/** |
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* Scan next sub dir |
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*/ |
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void ScanNextSubdirL(); |
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138 |
|
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/** |
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* Iterates iEntries adding entries as needed to object manager and |
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* iDirStack. |
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*/ |
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void ProcessEntriesL(); |
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144 |
|
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/** |
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* Add a file entry to the object store |
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* @param aFullFileName current scanned file path |
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*/ |
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void AddEntryL( const TDesC& aFullFileName ); |
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150 |
|
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/** |
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* Returns a TMTPFormatCode for the requested object |
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*/ |
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TMTPFormatCode GetObjectFormatCode( const TDesC& aFullFileName ); |
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|
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/** |
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* @param aFullFileName the object file name |
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* @return the file if needed to be enumeratored? |
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*/ |
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TBool IsFileAccepted( const TDesC& aFullFileName ); |
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161 |
|
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/** |
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* start count system tick |
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*/ |
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void StartEnumerationCount(); |
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166 |
|
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/** |
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* check if the system tick more than predefined value |
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* @retuan if more than the predefined value, return true |
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* else return false |
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*/ |
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TBool IsOverThreshold(); |
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173 |
|
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/** |
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* Get modified content and report to Symbian MTP Framework |
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*/ |
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void GetModifiedContentL( const TDesC& aStorageRoot ); |
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|
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private: |
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// Owned |
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/** MMTPDataProviderFramework used to access MTP components*/ |
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MMTPDataProviderFramework& iFramework; |
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183 |
|
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/** MTP Object Manager */ |
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MMTPObjectMgr& iObjectMgr; |
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|
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/** MTP Data Provider ID */ |
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TUint iDataProviderId; |
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|
0
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CMediaMtpDataProvider& iDataProvider; |
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TParse iPath; |
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RDir iDir; |
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TEntryArray iEntries; |
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TInt iFirstUnprocessed; |
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RPointerArray<TEntry> iDirStack; |
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RArray<TUint> iStorages; |
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TUint32 iStorageId; |
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TUint32 iParentHandle; |
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TMTPFormatCode iFormatCode; |
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TBool iScanningDir; |
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|
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// record the system tick |
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TUint iTickCountBegin; |
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TInt iTickPeriod; |
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|
0
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#if defined(_DEBUG) || defined(MMMTPDP_PERFLOG) |
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CMmMtpDpPerfLog* iPerfLog; |
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#endif |
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}; |
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#endif // CMEDIAMTPDATAPROVIDERENUMERATOR_H |