williamr@2: /*
williamr@2: * Copyright (c) 2003, 2004 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: * All rights reserved.
williamr@2: * This component and the accompanying materials are made available
williamr@4: * under the terms of "Eclipse Public License v1.0"
williamr@2: * which accompanies this distribution, and is available
williamr@4: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
williamr@2: *
williamr@2: * Initial Contributors:
williamr@2: * Nokia Corporation - initial contribution.
williamr@2: *
williamr@2: * Contributors:
williamr@2: *
williamr@2: * Description:  Exif file format parser ( reader ) class
williamr@2: *
williamr@2: */
williamr@2: 
williamr@2: 
williamr@2: #ifndef EXIFREAD_H
williamr@2: #define EXIFREAD_H
williamr@2: 
williamr@2: //  INCLUDES
williamr@2: #include <e32base.h>
williamr@2: 
williamr@2: // CONSTANTS
williamr@2: 
williamr@2: // MACROS
williamr@2: 
williamr@2: // DATA TYPES
williamr@2: enum TExifIfdType
williamr@2:     {
williamr@2: 	EIfd0 = 0,
williamr@2: 	EIfdExif,
williamr@2: 	EIfd1,
williamr@2: 	EIfdGps,
williamr@2: 	EIfdIntOp
williamr@2:     };
williamr@2: 
williamr@2: 
williamr@2: // FUNCTION PROTOTYPES
williamr@2: 
williamr@2: // FORWARD DECLARATIONS
williamr@2: class CExifTag;
williamr@2: 
williamr@2: // CLASS DECLARATION
williamr@2: 
williamr@2: /**
williamr@2: * CExifRead
williamr@2: * Interface class for parsing Exif v2.2 file format. An instance of this class 
williamr@2: * can be instantiated providing valid Exif data. 
williamr@2: *
williamr@2: * @lib ExifLib
williamr@2: * @since 2.6 
williamr@2: */
williamr@2: NONSHARABLE_CLASS( CExifRead ): public CBase
williamr@2:     {
williamr@2: 
williamr@2:     public:  // Enumerations
williamr@2:         enum TExifReadOption
williamr@2:         {
williamr@2: 	    ENoOptions          = 0x0000, // Original, safe full parsing
williamr@2: 	    ENoJpeg             = 0x0001, // No main JPEG included, no parsing for main image
williamr@2: 	    EFastJpegParsing    = 0x0002, // Fast JPEG marker parsing
williamr@2: 	    ENoTagChecking      = 0x0004  // Ignore unknown EXIF tags and mandatory tag checking
williamr@2:         };
williamr@2: 
williamr@2:     public:  // Constructors and destructor
williamr@2:         
williamr@2:         /**
williamr@2:         * Two-phased constructor.
williamr@2:         */
williamr@2:     	IMPORT_C static CExifRead* NewL( const TDesC8& aExifData );
williamr@2: 
williamr@2:     	IMPORT_C static CExifRead* NewL( const TDesC8& aExifData, TUint aExifReadOption );
williamr@2:         
williamr@2:         /**
williamr@2:         * Destructor.
williamr@2:         */
williamr@2:     	virtual ~CExifRead();
williamr@2: 
williamr@2:     public: // New functions
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns the Tag instance, which has the specified ID from the 
williamr@2:         * requested IFD.
williamr@2:         * @since 2.6
williamr@2:         * @param aIfdType The hosting IFD type
williamr@2:         * @param aTagId The queried tag ID.
williamr@2:         * @return Unmodifiable tag instance returned.
williamr@2:         */
williamr@2:     	virtual const CExifTag* GetTagL( 
williamr@2:             TExifIfdType aIfdType, 
williamr@2:             TUint16 aTagId ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns the IDs of all the tags that are stored in the Exif data.
williamr@2:         * @since 2.6
williamr@2:         * @param aIfdType The hosting IFD type.
williamr@2:         * @param aNoTags Number of tag IDs returned.
williamr@2:         * @return Pointer to the tag IDs.
williamr@2:         */
williamr@2:     	virtual TUint16* GetTagIdsL( 
williamr@2:             TExifIfdType aIfdType, 
williamr@2:             TInt& aNoTags ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns the types of the IFDs stored in the Exif data.
williamr@2:         * @since 2.6
williamr@2:         * @param aNoIfd Number of IFD types returned.
williamr@2:         * @return Pointer to the IFD types.
williamr@2:         */
williamr@2:     	virtual TExifIfdType* GetIfdTypesL( TInt& aNoIfd ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns pointer to a copy of the thumbnail image data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing a copy of the 
williamr@2:         * Exif thumbnail image.
williamr@2:         */
williamr@2:     	virtual HBufC8* GetThumbnailL() const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns a boolean stating if the queried IFD structure exists in the 
williamr@2:         * Exif data.
williamr@2:         * @since 2.6
williamr@2:         * @param aIfdType The queried IFD type.
williamr@2:         * @return Boolean stating if the specified IFD exists or not.
williamr@2:         */
williamr@2:     	virtual TBool IfdExists( TExifIfdType aIfdType ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns a boolean stating if the queried tag exists in the specified 
williamr@2:         * IFD structure.
williamr@2:         * @since 2.6
williamr@2:         * @param aTagId Queried tag ID.
williamr@2:         * @param aIfdType The hosting IFD type.
williamr@2:         * @return Boolean stating if the specified tag exists or not.
williamr@2:         */
williamr@2:     	virtual TBool TagExists( 
williamr@2:             TUint16 aTagId, 
williamr@2:             TExifIfdType aIfdType ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Image Description tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Image 
williamr@2:         * Description data.
williamr@2:         */
williamr@2:     	virtual HBufC8* GetImageDescriptionL() const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Make tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Make data.
williamr@2:         */
williamr@2:     	virtual HBufC8* GetMakeL() const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Model tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Model data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetModelL() const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Transfer Function tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Transfer 
williamr@2:         * Function data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetTransferFunctionL() const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Date Time tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Date Time 
williamr@2:         * data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetDateTimeL() const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Software tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Software 
williamr@2:         * data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetSoftwareL() const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Copyright tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Copyright 
williamr@2:         * data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetCopyrightL() const = 0; 
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Orientation tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aOrientation Returned Orientation data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:     	virtual TInt GetOrientation( TUint16& aOrientation ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the X Resolution tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aXResolution1 Returned X Resolution numerator.
williamr@2:         * @param aXResolution2 Returned X Resolution denominator.
williamr@2:         * @return Error code. 
williamr@2:         */
williamr@2:         virtual TInt GetXResolution( 
williamr@2:             TUint32& aXResolution1, 
williamr@2:             TUint32& aXResolution2 ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Y Resolution tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aYResolution1 Returned Y Resolution numerator.
williamr@2:         * @param aYResolution2 Returned Y Resolution denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetYResolution( 
williamr@2:             TUint32& aYResolution1, 
williamr@2:             TUint32& aYResolution2 ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Resolution Unit tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aResolutionUnit Returned Resolution Unit data.
williamr@2:         * @return Error code. 
williamr@2:         */
williamr@2:         virtual TInt GetResolutionUnit( TUint16& aResolutionUnit ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the YCbCr Positioning tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aYCbCrPositioning Returned YCbCr Positioning data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetYCbCrPositioning( 
williamr@2:             TUint16& aYCbCrPositioning ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Exif Ifd Pointer tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aExifIfdPointer Returned Exif Ifd Pointer data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetExifIfdPointer( TUint32& aExifIfdPointer ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Gps Info Ifd Pointer tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aGpsInfoIfdPointer Returned Gps Info Ifd Pointer data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetGpsInfoIfdPointer( 
williamr@2:             TUint32& aGpsInfoIfdPointer ) const = 0; 
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Iso Speed Ratings tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Iso Speed 
williamr@2:         * Ratings data.
williamr@2:         */
williamr@2:     	virtual HBufC8* GetIsoSpeedRatingsL() const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Date Time Original tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Date Time 
williamr@2:         * Original data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetDateTimeOriginalL() const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Date Time Digitized tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Date Time 
williamr@2:         * Digitized data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetDateTimeDigitizedL() const = 0; 
williamr@2: 
williamr@2:     	/**
williamr@2:         * Gets the Maker Note tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Maker Note 
williamr@2:         * data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetMakerNoteL() const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the User Comment tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the User 
williamr@2:         * Comment data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetUserCommentL() const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Related Sound File tag data.
williamr@2:         * @since 2.6
williamr@2:         * @return Pointer to the descriptor containing copy of the Related 
williamr@2:         * Sound File data.
williamr@2:         */
williamr@2:         virtual HBufC8* GetRelatedSoundFileL() const = 0; 
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Exposure Time tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param ExposureTime Returned Exposure Time data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:     	virtual TInt GetExposureTime( 
williamr@2:             TUint32& aExposureTime1, 
williamr@2:             TUint32& aExposureTime2 ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Components Configuration tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aComponentsConfiguration Returned Components Configuration 
williamr@2:         * data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetComponentsConfiguration( 
williamr@2:             TUint8& aFirstComponent, TUint8& aSecondComponent,
williamr@2:             TUint8& aThirdComponent, TUint8& aFourthComponent) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Flash tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aFlash Returned Flash data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetFlash( TUint16& aFlash ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the ColorSpace tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aColorSpace Returned ColorSpace data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetColorSpace( TUint16& aColorSpace ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Pixel X Dimension tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aPixelXDimension Returned Pixel X Dimension data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetPixelXDimension( TUint32& aPixelXDimension ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Pixel Y Dimension tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aPixelYDimension Returned Pixel Y Dimension data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetPixelYDimension( TUint32& aPixelYDimension ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Exposure Mode tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aExposureMode Returned Exposure Mode data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetExposureMode( TUint16& aExposureMode ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the White Balance tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aWhiteBalance Returned White Balance data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetWhiteBalance( TUint16& aWhiteBalance ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Scene Capture Type tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aSceneCaptureType Returned Scene Capture Type data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetSceneCaptureType( 
williamr@2:             TUint16& aSceneCaptureType ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Exposure Program tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aExposureProgram Returned Exposure Program data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetExposureProgram( TUint16& aExposureProgram ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Aperture Value tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aApertureValue1 Returned Aperture Value numerator.
williamr@2:         * @param aApertureValue2 Returned Aperture Value denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetApertureValue( 
williamr@2:             TUint32& aApertureValue1, 
williamr@2:             TUint32& aApertureValue2 ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Exposure Bias Value tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aExposureBiasValue1 Returned Exposure Bias Value numerator.
williamr@2:         * @param aExposureBiasValue1 Returned Exposure Bias Value denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetExposureBiasValue( 
williamr@2:             TInt32& aExposureBiasValue1, 
williamr@2:             TInt32& aExposureBiasValue2 ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Metering Mode tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aMeteringMode Returned Metering Mode data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetMeteringMode( TUint16& aMeteringMode ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Light Source tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aLightSource Returned Light Source data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetLightSource( TUint16& aLightSource ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the File Source tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aFileSource Returned File Source data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetFileSource( TInt8& aFileSource ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Digital Zoom Ratio tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aDigitalZoomRatio1 Returned Digital Zoom Ratio numerator.
williamr@2:         * @param aDigitalZoomRatio2 Returned Digital Zoom Ratio denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetDigitalZoomRatio( 
williamr@2:             TUint32& aDigitalZoomRatio1, 
williamr@2:             TUint32& aDigitalZoomRatio2 ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Contrast tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aContrast Returned Contrast data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetContrast( TUint16& aContrast ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Saturation tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aSaturation Returned Saturation data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetSaturation( TUint16& aSaturation ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Sharpness tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aSharpness Returned Sharpness data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetSharpness( TUint16& aSharpness ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Exif Version tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aExifVersion Returned Exif Version data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetExifVersion( TUint32& aExifVersion ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Flash Pix Version tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aFlashPixVersion Returned Flash Pix Version data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetFlashPixVersion( TUint32& aFlashPixVersion ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the Interoperability Ifd Pointer tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aInteroperabilityIfdPointer Returned Interoperability Ifd 
williamr@2:         * Pointer data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetInteroperabilityIfdPointer( 
williamr@2:             TUint32& aInteroperabilityIfdPointer ) const = 0; 
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the thumbnail X Resolution tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aXResolution1 Returned thumbnail X Resolution numerator.
williamr@2:         * @param aXResolution1 Returned thumbnail X Resolution denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:     	virtual TInt GetThumbnailXResolution( 
williamr@2:             TUint32& aXResolution1, 
williamr@2:             TUint32& aXResolution2 ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the thumbnail Y Resolution tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aYResolution1 Returned thumbnail Y Resolution numerator.
williamr@2:         * @param aYResolution1 Returned thumbnail Y Resolution denominator.
williamr@2:         * @return Error code.
williamr@2:         */        
williamr@2:         virtual TInt GetThumbnailYResolution( 
williamr@2:             TUint32& aYResolution1, 
williamr@2:             TUint32& aYResolution2 ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the thumbnail Resolution Unit tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aResolutionUnit Returned thumbnail Resolution Unit data.
williamr@2:         * @return Error code.
williamr@2:         */            
williamr@2:         virtual TInt GetThumbnailResolutionUnit( 
williamr@2:             TUint16& aResolutionUnit ) const = 0;
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the thumbnail Compression tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aCompression Returned thumbnail Compression data.
williamr@2:         * @return Error code.
williamr@2:         */            
williamr@2:         virtual TInt GetThumbnailCompression( TUint16& aCompression ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the thumbnail Jpeg Interchange Format tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aJpegInterchangeFormat Returned thumbnail Jpeg Interchange 
williamr@2:         * Format data.
williamr@2:         * @return Error code.
williamr@2:         */            
williamr@2:         virtual TInt GetJpegInterchangeFormat( 
williamr@2:             TUint32& aJpegInterchangeFormat ) const = 0; 
williamr@2:     	
williamr@2:         /**
williamr@2:         * Gets the thumbnail Jpeg Interchange Format Length tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aJpegInterchangeFormatLength Returned thumbnail Jpeg 
williamr@2:         * Interchange Format Length data.
williamr@2:         * @return Error code.
williamr@2:         */    
williamr@2:         virtual TInt GetJpegInterchangeFormatLength( 
williamr@2:             TUint32& aJpegInterchangeFormatLength ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Returns a copy of whole Exif APP1 segment in a descriptor.
williamr@2:         * @since 2.6
williamr@2:         * @return Descriptor containing the Exif APP1 segment data.
williamr@2:         */    
williamr@2:         virtual HBufC8* GetExifAppSegmentL() const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Shutter Speed Value tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aShutterSpeedValue1 Shutter Speed Value numerator.
williamr@2:         * @param aShutterSpeedValue2 Shutter Speed Value denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetShutterSpeedValue( TInt32& aShutterSpeedValue1, 
williamr@2:             TInt32& aShutterSpeedValue2 ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Brightness Value tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aBrightnessValue1 Brightness Value numerator.
williamr@2:         * @param aBrightnessValue2 Brightness Value denominator.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetBrightnessValue( TInt32& aBrightnessValue1, 
williamr@2:             TInt32& aBrightnessValue2 ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Custom Rendered tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aCustomRendered Returned Custom Rendered data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetCustomRendered( TUint16& aCustomRendered ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Gain Control tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aGainControl Returned Gain Control data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetGainControl( TUint16& aGainControl ) const = 0;
williamr@2: 
williamr@2:         /**
williamr@2:         * Gets the Gps Version tag data.
williamr@2:         * @since 2.6
williamr@2:         * @param aGpsVersion Returned Gps Version data.
williamr@2:         * @return Error code.
williamr@2:         */
williamr@2:         virtual TInt GetGpsVersion( TUint32& aGpsVersion ) const = 0; 
williamr@2:     };
williamr@2: 
williamr@2: #endif      // EXIFREAD_H   
williamr@2:             
williamr@2: // End of File