mmserv/metadatautility/Src/3GPExtParser.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 14 Apr 2010 16:29:54 +0300
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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:  This class implements an 3GPExt metadata parser 
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*
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*/
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#ifndef C3GPEXTPARSER_H
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#define C3GPEXTPARSER_H
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// INCLUDES
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#include <e32base.h>
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#include <mp4lib.h>
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#include "MetaDataFieldContainer.h"
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#include "MetaDataField.hrh"
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// CONSTANTS
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_LIT8 (K3GPExtMetaTitleFormat, "%cnam"); 
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_LIT8 (K3GPExtMetaArtistFormat, "%cART"); 
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_LIT8 (K3GPExtMetaComposerFormat, "%cwrt"); 
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_LIT8 (K3GPExtMetaAlbumFormat, "%calb"); 
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_LIT8 (K3GPExtMetaCommentFormat, "%ccmt"); 
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_LIT8 (K3GPExtMetaCustomGenreFormat, "%cgen");  // mapped to rating
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_LIT8 (K3GPExtMetaYearFormat, "%cday"); 
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_LIT8 (K3GPExtMetaGenre, "gnre");
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_LIT8 (K3GPExtMetaTrack, "trkn"); 
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_LIT8 (K3GPExtMetaJpeg, "covr"); 
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// CLASS DECLARATION
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/**
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*  This class implements an 3GPExt metadata parser.
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*
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*  @lib 3GPExtParser.lib
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*  @since 3.0
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*/
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class C3GPExtParser : public CBase
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	{
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    public:  // Constructors and destructor
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        /**
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        * Two-phased constructor.
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        * @return A pointer to a new instance of parser; NULL if parser is not created.
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        */
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        IMPORT_C static C3GPExtParser* NewL(MP4Handle& aMP4Handle);
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        /**
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        * Destructor.
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        */
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        IMPORT_C virtual ~C3GPExtParser();
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        /**
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		* Extract meta data boxes from ilst
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		* @since 3.0
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		* @param aBox wanted metadata box
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        * @param aFieldId metadata field in 3GPExtParser
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		* @return void
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		*/
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		IMPORT_C void GetilstBoxesL(const TDesC8& aBox, TMetaDataFieldId aFieldId, HBufC** aBuf);
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		/**
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		* Extract meta data boxes from ilst
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		* 8-bit version to support international languages in string metadata
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		* @since 3.1
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		* @param aBox wanted metadata box
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        * @param aFieldId metadata field in 3GPExtParser
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		* @return void
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		*/
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		IMPORT_C void GetilstBoxesL(const TDesC8& aBox, TMetaDataFieldId aFieldId, HBufC8** aBuf);
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		/** 
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		* Checks if file has 3GPExt metadata
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		*/ 
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		IMPORT_C TBool Is3GPExtMetadataL();
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 	private:
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        /**
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        * C++ default constructor.
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        */
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		C3GPExtParser(MP4Handle& aMP4Handle);
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        /**
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        * By default Symbian 2nd phase constructor is private.
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        */
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		void ConstructL();
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		/**
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        * Maps ID3v1 genre integer to string
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        * @param aNum genre integer code
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        * @param aGenrePtr string genre value returned
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        * @since 3.0
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        * @return void
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        */
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		void MapID3GenreToString(TInt aNum, TDes& aGenrePtr);
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		/**
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        * Translates error code from MP4 library to one of System Errors.
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        * @since 3.0
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        * @param aError error code from MP4 library
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        * @return System error
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        */
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		TInt TranslateMP4Err( MP4Err aError );
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   118
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		/**
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        * Parses iList Boxes
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        * @since 3.0
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        * @param none
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        * @return void 
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        */
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		void ParseIlstBoxesL();
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   126
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	private:
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		// MP4 Handle
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		MP4Handle& iMP4Handle;
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		// ilst box
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		TPtrC8 ilst;
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		// 3GPExt metadata exists
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		TBool iExists;
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		// local chunk
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		RChunk iChunk;
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		// chuck status
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		TInt iChunkStatus;
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   140
		
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		TUint32 iTitleOffset;
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		TUint32 iTitleSize;
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 		TUint32 iArtistOffset;	
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 		TUint32 iArtistSize;
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 		TUint32 iComposerOffset;
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 		TUint32 iComposerSize;
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 		TUint32 iAlbumOffset;
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 		TUint32 iAlbumSize;
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 		TUint32 iCommentOffset;
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 		TUint32 iCommentSize;
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 		TUint32 iCustomGenreOffset;
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 		TUint32 iCustomGenreSize;
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 		TUint32 iYearOffset;
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 		TUint32 iYearSize;
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 		TUint32 iGenreOffset;
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 		TUint32 iGenreSize;
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 		TUint32 iTrackNumberOffset;
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 		TUint32 iTrackNumberSize;
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 		TUint32 iCoverOffset;
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 		TUint32 iCoverSize;
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   161
 		
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 	public:
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 				// constants
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		TBuf8<4> K3GPExtMetaTitle;
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		TBuf8<4> K3GPExtMetaArtist;
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		TBuf8<4> K3GPExtMetaComposer;
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		TBuf8<4> K3GPExtMetaAlbum;
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		TBuf8<4> K3GPExtMetaComment;
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		TBuf8<4> K3GPExtMetaCustomGenre;
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		TBuf8<4> K3GPExtMetaYear;
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    };
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#endif      // C3GPEXTPARSER_H
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// End of File