mmserv/metadatautility/Src/MetaDataParserID3v1.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 ID3v1 and v1.1 parser as specified in
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*                www.id3.org.
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*
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*/
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#ifndef CMETADATAPARSERID3V1_H
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#define CMETADATAPARSERID3V1_H
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// INCLUDES
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#include <e32base.h>
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#include "MetaDataParser.h"
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#include "MetaDataSource.h"
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#include "MetaDataFieldContainer.h"
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#include "MetaDataField.h"
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// CONSTANTS
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const TInt KID3v1TagLength = 128;
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// CLASS DECLARATION
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/**
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*  This class implements an ID3v1 and v1.1 parser.
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*
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*  @lib MetaDataUtility.lib
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*  @since 3.0
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*/
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class CMetaDataParserID3v1 : public CMetaDataParser
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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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        * @param aSource Reference to a metadata source
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        * @return A pointer to a new instance of this class
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        */
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        static CMetaDataParserID3v1* NewL( CMetaDataSource& aSource );
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        /**
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        * Destructor.
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        */
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        virtual ~CMetaDataParserID3v1();
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    public: // Functions from base classes
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        /**
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        * From CMetaDataParser
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        * Parses the source and if metadata is found, the metadata fields are
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        * inserted into the container.
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        * @since 3.0
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		* @param aWantedFields An array of TMetaDataFieldId's. Empty array is interpreted as all fields.
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        * @param aContainer On return, metadata found in aSource is stored here
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		* @return void
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        */
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		void ParseL( const RArray<TMetaDataFieldId>& aWantedFields, CMetaDataFieldContainer& aContainer );
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        enum TAutoDetectCommand		// Possible autodetect commands
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		{
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	    EDetectFromTopList = 0,
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		EDetectFromNextList,
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		EDetectFromRestList
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		};
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		/**
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        * From CMetaDataParser
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        * returns ID3 version
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        * @since 3.0
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		* @return TID3Version
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        */
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		TID3Version ID3Version();
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	private:
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        /**
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        * C++ default constructor.
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        */
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		CMetaDataParserID3v1( CMetaDataSource& aSource );
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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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		* Validates whether there is ID3v1 tag in the source or not.
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		*/
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		TBool ValidateL();
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        /**
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        * Append title to the container, if found.
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        * @return void
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		*/
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		void GetTitleL();
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        /**
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        * Append artist to the container, if found.
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        * @return void
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		*/
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		void GetArtistL();
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        /**
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        * Append album to the container, if found.
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        * @return void
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		*/
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		void GetAlbumL();
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        /**
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        * Append year to the container, if found.
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        * @return void
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		*/
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		void GetYearL();
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        /**
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        * Append comment to the container, if found.
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        * @return void
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		*/
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		void GetCommentL();
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        /**
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        * Append album track to the container, if found.
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        * @return void
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		*/
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		void GetAlbumTrackL();
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        /**
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        * Append genre to the container, if found.
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        * @return void
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		*/
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		void GetGenreL();
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        /**
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        * Converts to unicode.
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		* @param aDesc Source to be converted to unicode.
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		* @param aUnicode Contains the converted unicode on return.
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        * @return KErrNone if successful, otherwise one of the system errors.
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		*/
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		TInt ConvertToUnicodeL( const TDesC8& aDesc, TDes16& aUnicode );
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        /**
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        * Detects the character set for the descriptor.
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		* @param aDesc Source to be converted to unicode.
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        * @return KErrNone if successful, otherwise one of the system errors.
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		*/
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		TInt DetectCharacterSetL( const TDesC8& aDesc);
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 	private:	// Data
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		// Metadata source
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		CMetaDataSource& iSource;
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		// Tag data
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		TBuf8<KID3v1TagLength> iTagData;
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		// Character Set Id used during Unicode conversion
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    	TUint iCharacterSetId;
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    };
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#endif      // CMETADATAPARSERID3V1_H
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// End of File