--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/imagingmodules/exiflib/inc/ExifReadImpl.h Thu Dec 17 09:22:31 2009 +0200
@@ -0,0 +1,691 @@
+/*
+* Copyright (c) 2003, 2004 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Exif file format parser ( reader ) class implementation
+*
+*/
+
+
+#ifndef EXIFREADIMPL_H
+#define EXIFREADIMPL_H
+
+// INCLUDES
+#include "ExifRead.h"
+#include "ExifValueTable.h"
+
+// CONSTANTS
+
+// MACROS
+
+// DATA TYPES
+
+// FUNCTION PROTOTYPES
+
+// FORWARD DECLARATIONS
+class CExifEndianBase;
+class CExifCore;
+
+// CLASS DECLARATION
+
+/**
+* CExifReadImpl
+* Implementation class for parsing Exif v2.2 file format. An instance of this
+* class can be instantiated providing valid Exif data.
+*
+* @lib ExifLib
+* @since 2.6
+*/
+NONSHARABLE_CLASS( CExifReadImpl ): public CExifRead
+ {
+ public: // Constructors and destructor
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifReadImpl* NewL( const TDesC8& aExifData, TBool aCreate, TUint aExifReadOption );
+
+ /**
+ * Two-phased constructor.
+ */
+ static CExifReadImpl* NewL();
+
+ /**
+ * Destructor.
+ */
+ virtual ~CExifReadImpl();
+
+ public: // Functions from base classes
+
+ /**
+ * From CExifRead. Returns the Tag instance, which has the specified ID
+ * from the requested IFD.
+ * @since 2.6
+ * @param aIfdType The hosting IFD type
+ * @param aTagId The queried tag ID.
+ * @return Unmodifiable tag instance returned.
+ */
+ const CExifTag* GetTagL( TExifIfdType aIfdType, TUint16 aTagId ) const;
+
+ /**
+ * From CExifRead. Returns the IDs of all the tags that are stored in
+ * the Exif data.
+ * @since 2.6
+ * @param aIfdType The hosting IFD type.
+ * @param aNoTags Number of tag IDs returned.
+ * @return Pointer to the tag IDs.
+ */
+ TUint16* GetTagIdsL( TExifIfdType aIfdType, TInt& aNoTags ) const;
+
+ /**
+ * From CExifRead. Returns the types of the IFDs stored in the Exif data.
+ * @since 2.6
+ * @param aNoIfd Number of IFD types returned.
+ * @return Pointer to the IFD types.
+ */
+ TExifIfdType* GetIfdTypesL( TInt& aNoIfd ) const;
+
+ /**
+ * From CExifRead. Returns pointer to a copy of the thumbnail image data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing a copy of the Exif
+ * thumbnail image.
+ */
+ HBufC8* GetThumbnailL() const;
+
+ /**
+ * From CExifRead. Returns a boolean stating if the queried IFD
+ * structure exists in the Exif data.
+ * @since 2.6
+ * @param aIfdType The queried IFD type.
+ * @return Boolean stating if the specified IFD exists or not.
+ */
+ TBool IfdExists( TExifIfdType aIfdType ) const;
+
+ /**
+ * From CExifRead. Returns a boolean stating if the queried tag exists
+ * in the specified IFD structure.
+ * @since 2.6
+ * @param aTagId Queried tag ID.
+ * @param aIfdType The hosting IFD type.
+ * @return Boolean stating if the specified tag exists or not.
+ */
+ TBool TagExists( TUint16 aTagId, TExifIfdType aIfdType ) const;
+
+ /**
+ * From CExifRead. Gets the Image Description tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Image
+ * Description data.
+ */
+ HBufC8* GetImageDescriptionL() const;
+
+ /**
+ * From CExifRead. Gets the Make tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Make data.
+ */
+ HBufC8* GetMakeL() const;
+
+ /**
+ * From CExifRead. Gets the Model tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Model data.
+ */
+ HBufC8* GetModelL() const;
+
+ /**
+ * From CExifRead. Gets the Transfer Function tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Transfer
+ * Function data.
+ */
+ HBufC8* GetTransferFunctionL() const;
+
+ /**
+ * From CExifRead. Gets the Date Time tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Date Time
+ * data.
+ */
+ HBufC8* GetDateTimeL() const;
+
+ /**
+ * From CExifRead. Gets the Software tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Software
+ * data.
+ */
+ HBufC8* GetSoftwareL() const;
+
+ /**
+ * From CExifRead. Gets the Copyright tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Copyright
+ * data.
+ */
+ HBufC8* GetCopyrightL() const;
+
+ /**
+ * From CExifRead. Gets the Orientation tag data.
+ * @since 2.6
+ * @param aOrientation Returned Orientation data.
+ * @return Error code.
+ */
+ TInt GetOrientation( TUint16& aOrientation ) const;
+
+ /**
+ * From CExifRead. Gets the X Resolution tag data.
+ * @since 2.6
+ * @param aXResolution1 Returned X Resolution numerator.
+ * @param aXResolution2 Returned X Resolution denominator.
+ * @return Error code.
+ */
+ TInt GetXResolution(
+ TUint32& aXResolution1,
+ TUint32& aXResolution2 ) const;
+
+ /**
+ * From CExifRead. Gets the Y Resolution tag data.
+ * @since 2.6
+ * @param aYResolution1 Returned Y Resolution numerator.
+ * @param aYResolution2 Returned Y Resolution denominator.
+ * @return Error code.
+ */
+ TInt GetYResolution(
+ TUint32& aYResolution1,
+ TUint32& aYResolution2 ) const;
+
+ /**
+ * From CExifRead. Gets the Resolution Unit tag data.
+ * @since 2.6
+ * @param aResolutionUnit Returned Resolution Unit data.
+ * @return Error code.
+ */
+ TInt GetResolutionUnit( TUint16& aResolutionUnit ) const;
+
+ /**
+ * From CExifRead. Gets the YCbCr Positioning tag data.
+ * @since 2.6
+ * @param aYCbCrPositioning Returned YCbCr Positioning data.
+ * @return Error code.
+ */
+ TInt GetYCbCrPositioning( TUint16& aYCbCrPositioning ) const;
+
+ /**
+ * From CExifRead. Gets the Exif Ifd Pointer tag data.
+ * @since 2.6
+ * @param aExifIfdPointer Returned Exif Ifd Pointer data.
+ * @return Error code.
+ */
+ TInt GetExifIfdPointer( TUint32& aExifIfdPointer ) const;
+
+ /**
+ * From CExifRead. Gets the Gps Info Ifd Pointer tag data.
+ * @since 2.6
+ * @param aGpsInfoIfdPointer Returned Gps Info Ifd Pointer data.
+ * @return Error code.
+ */
+ TInt GetGpsInfoIfdPointer( TUint32& aGpsInfoIfdPointer ) const;
+
+ /**
+ * From CExifRead. Gets the Iso Speed Ratings tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Iso Speed
+ * Ratings data.
+ */
+ HBufC8* GetIsoSpeedRatingsL() const;
+
+ /**
+ * From CExifRead. Gets the Date Time Original tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Date Time
+ * Original data.
+ */
+ HBufC8* GetDateTimeOriginalL() const;
+
+ /**
+ * From CExifRead. Gets the Date Time Digitized tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Date Time
+ * Digitized data.
+ */
+ HBufC8* GetDateTimeDigitizedL() const;
+
+ /**
+ * From CExifRead. Gets the Maker Note tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Maker Note
+ * data.
+ */
+ HBufC8* GetMakerNoteL() const;
+
+ /**
+ * From CExifRead. Gets the User Comment tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the User Comment
+ * data.
+ */
+ HBufC8* GetUserCommentL() const;
+
+ /**
+ * From CExifRead. Gets the Related Sound File tag data.
+ * @since 2.6
+ * @return Pointer to the descriptor containing copy of the Related
+ * Sound File data.
+ */
+ HBufC8* GetRelatedSoundFileL() const;
+
+ /**
+ * From CExifRead. Gets the Exposure Time tag data.
+ * @since 2.6
+ * @param ExposureTime Returned Exposure Time data.
+ * @return Error code.
+ */
+ TInt GetExposureTime(
+ TUint32& aExposureTime1,
+ TUint32& aExposureTime2 ) const;
+
+ /**
+ * From CExifRead. Gets the Components Configuration tag data.
+ * @since 2.6
+ * @param aComponentsConfiguration Returned Components Configuration
+ * data.
+ * @return Error code.
+ */
+ TInt GetComponentsConfiguration(
+ TUint8& aFirstComponent, TUint8& aSecondComponent,
+ TUint8& aThirdComponent, TUint8& aFourthComponent) const;
+
+
+ /**
+ * From CExifRead. Gets the Flash tag data.
+ * @since 2.6
+ * @param aFlash Returned Flash data.
+ * @return Error code.
+ */
+ TInt GetFlash( TUint16& aFlash ) const;
+
+ /**
+ * From CExifRead. Gets the ColorSpace tag data.
+ * @since 2.6
+ * @param aColorSpace Returned ColorSpace data.
+ * @return Error code.
+ */
+ TInt GetColorSpace( TUint16& aColorSpace ) const;
+
+ /**
+ * From CExifRead. Gets the Pixel X Dimension tag data.
+ * @since 2.6
+ * @param aPixelXDimension Returned Pixel X Dimension data.
+ * @return Error code.
+ */
+ TInt GetPixelXDimension( TUint32& aPixelXDimension ) const;
+
+ /**
+ * From CExifRead. Gets the Pixel Y Dimension tag data.
+ * @since 2.6
+ * @param aPixelYDimension Returned Pixel Y Dimension data.
+ * @return Error code.
+ */
+ TInt GetPixelYDimension( TUint32& aPixelYDimension ) const;
+
+ /**
+ * From CExifRead. Gets the Exposure Mode tag data.
+ * @since 2.6
+ * @param aExposureMode Returned Exposure Mode data.
+ * @return Error code.
+ */
+ TInt GetExposureMode( TUint16& aExposureMode ) const;
+
+ /**
+ * From CExifRead. Gets the White Balance tag data.
+ * @since 2.6
+ * @param aWhiteBalance Returned White Balance data.
+ * @return Error code.
+ */
+ TInt GetWhiteBalance( TUint16& aWhiteBalance ) const;
+
+ /**
+ * From CExifRead. Gets the Scene Capture Type tag data.
+ * @since 2.6
+ * @param aSceneCaptureType Returned Scene Capture Type data.
+ * @return Error code.
+ */
+ TInt GetSceneCaptureType( TUint16& aSceneCaptureType ) const;
+
+ /**
+ * From CExifRead. Gets the Exposure Program tag data.
+ * @since 2.6
+ * @param aExposureProgram Returned Exposure Program data.
+ * @return Error code.
+ */
+ TInt GetExposureProgram( TUint16& aExposureProgram ) const;
+
+ /**
+ * From CExifRead. Gets the Aperture Value tag data.
+ * @since 2.6
+ * @param aApertureValue1 Returned Aperture Value numerator.
+ * @param aApertureValue2 Returned Aperture Value denominator.
+ * @return Error code.
+ */
+ TInt GetApertureValue(
+ TUint32& aApertureValue1,
+ TUint32& aApertureValue2 ) const;
+
+ /**
+ * From CExifRead. Gets the Exposure Bias Value tag data.
+ * @since 2.6
+ * @param aExposureBiasValue1 Returned Exposure Bias Value numerator.
+ * @param aExposureBiasValue1 Returned Exposure Bias Value denominator.
+ * @return Error code.
+ */
+ TInt GetExposureBiasValue(
+ TInt32& aExposureBiasValue1,
+ TInt32& aExposureBiasValue2 ) const;
+
+ /**
+ * From CExifRead. Gets the Metering Mode tag data.
+ * @since 2.6
+ * @param aMeteringMode Returned Metering Mode data.
+ * @return Error code.
+ */
+ TInt GetMeteringMode( TUint16& aMeteringMode ) const;
+
+ /**
+ * From CExifRead. Gets the Light Source tag data.
+ * @since 2.6
+ * @param aLightSource Returned Light Source data.
+ * @return Error code.
+ */
+ TInt GetLightSource( TUint16& aLightSource ) const;
+
+ /**
+ * From CExifRead. Gets the File Source tag data.
+ * @since 2.6
+ * @param aFileSource Returned File Source data.
+ * @return Error code.
+ */
+ TInt GetFileSource( TInt8& aFileSource ) const;
+
+ /**
+ * From CExifRead. Gets the Digital Zoom Ratio tag data.
+ * @since 2.6
+ * @param aDigitalZoomRatio1 Returned Digital Zoom Ratio numerator.
+ * @param aDigitalZoomRatio2 Returned Digital Zoom Ratio denominator.
+ * @return Error code.
+ */
+ TInt GetDigitalZoomRatio(
+ TUint32& aDigitalZoomRatio1,
+ TUint32& aDigitalZoomRatio2 ) const;
+
+ /**
+ * From CExifRead. Gets the Contrast tag data.
+ * @since 2.6
+ * @param aContrast Returned Contrast data.
+ * @return Error code.
+ */
+ TInt GetContrast( TUint16& aContrast ) const;
+
+ /**
+ * From CExifRead. Gets the Saturation tag data.
+ * @since 2.6
+ * @param aSaturation Returned Saturation data.
+ * @return Error code.
+ */
+ TInt GetSaturation( TUint16& aSaturation ) const;
+
+ /**
+ * From CExifRead. Gets the Sharpness tag data.
+ * @since 2.6
+ * @param aSharpness Returned Sharpness data.
+ * @return Error code.
+ */
+ TInt GetSharpness( TUint16& aSharpness ) const;
+
+ /**
+ * From CExifRead. Gets the Exif Version tag data.
+ * @since 2.6
+ * @param aExifVersion Returned Exif Version data.
+ * @return Error code.
+ */
+ TInt GetExifVersion( TUint32& aExifVersion ) const;
+
+ /**
+ * From CExifRead. Gets the Flash Pix Version tag data.
+ * @since 2.6
+ * @param aFlashPixVersion Returned Flash Pix Version data.
+ * @return Error code.
+ */
+ TInt GetFlashPixVersion( TUint32& aFlashPixVersion ) const;
+
+ /**
+ * From CExifRead. Gets the Interoperability Ifd Pointer tag data.
+ * @since 2.6
+ * @param aInteroperabilityIfdPointer Returned Interoperability Ifd
+ * Pointer data.
+ * @return Error code.
+ */
+ TInt GetInteroperabilityIfdPointer(
+ TUint32& aInteroperabilityIfdPointer ) const;
+
+ /**
+ * From CExifRead. Gets the thumbnail X Resolution tag data.
+ * @since 2.6
+ * @param aXResolution1 Returned thumbnail X Resolution numerator.
+ * @param aXResolution1 Returned thumbnail X Resolution denominator.
+ * @return Error code.
+ */
+ TInt GetThumbnailXResolution(
+ TUint32& aXResolution1,
+ TUint32& aXResolution2 ) const;
+
+ /**
+ * From CExifRead. Gets the thumbnail Y Resolution tag data.
+ * @since 2.6
+ * @param aYResolution1 Returned thumbnail Y Resolution numerator.
+ * @param aYResolution1 Returned thumbnail Y Resolution denominator.
+ * @return Error code.
+ */
+ TInt GetThumbnailYResolution(
+ TUint32& aYResolution1,
+ TUint32& aYResolution2 ) const;
+
+ /**
+ * From CExifRead. Gets the thumbnail Resolution Unit tag data.
+ * @since 2.6
+ * @param aResolutionUnit Returned thumbnail Resolution Unit data.
+ * @return Error code.
+ */
+ TInt GetThumbnailResolutionUnit( TUint16& aResolutionUnit ) const;
+
+ /**
+ * From CExifRead. Gets the thumbnail Compression tag data.
+ * @since 2.6
+ * @param aCompression Returned thumbnail Compression data.
+ * @return Error code.
+ */
+ TInt GetThumbnailCompression( TUint16& aCompression ) const;
+
+ /**
+ * From CExifRead. Gets the thumbnail Jpeg Interchange Format tag data.
+ * @since 2.6
+ * @param aJpegInterchangeFormat Returned thumbnail Jpeg Interchange
+ * Format data.
+ * @return Error code.
+ */
+ TInt GetJpegInterchangeFormat( TUint32& aJpegInterchangeFormat ) const;
+
+ /**
+ * From CExifRead. Gets the thumbnail Jpeg Interchange Format Length tag
+ * data.
+ * @since 2.6
+ * @param aJpegInterchangeFormatLength Returned thumbnail Jpeg
+ * Interchange Format Length data.
+ * @return Error code.
+ */
+ TInt GetJpegInterchangeFormatLength(
+ TUint32& aJpegInterchangeFormatLength ) const;
+
+ /**
+ * From CExifRead. Returns a copy of whole Exif APP1 segment in a
+ * descriptor.
+ * @since 2.6
+ * @return Descriptor containing the Exif APP1 segment data.
+ */
+ HBufC8* GetExifAppSegmentL() const;
+
+ /**
+ * From CExifRead. Gets the Shutter Speed Value tag data.
+ * @since 2.6
+ * @param aShutterSpeedValue1 Shutter Speed Value numerator.
+ * @param aShutterSpeedValue2 Shutter Speed Value denominator.
+ * @return Error code.
+ */
+ TInt GetShutterSpeedValue( TInt32& aShutterSpeedValue1,
+ TInt32& aShutterSpeedValue2 ) const;
+
+ /**
+ * From CExifRead. Gets the Brightness Value tag data.
+ * @since 2.6
+ * @param aBrightnessValue1 Brightness Value numerator.
+ * @param aBrightnessValue2 Brightness Value denominator.
+ * @return Error code.
+ */
+ TInt GetBrightnessValue( TInt32& aBrightnessValue1,
+ TInt32& aBrightnessValue2 ) const;
+
+ /**
+ * From CExifRead. Gets the Custom Rendered tag data.
+ * @since 2.6
+ * @param aCustomRendered Returned Custom Rendered data.
+ * @return Error code.
+ */
+ TInt GetCustomRendered( TUint16& aCustomRendered ) const;
+
+ /**
+ * From CExifRead. Gets the Gain Control tag data.
+ * @since 2.6
+ * @param aGainControl Returned Gain Control data.
+ * @return Error code.
+ */
+ TInt GetGainControl( TUint16& aGainControl ) const;
+
+ /**
+ * From CExifRead. Gets the Gps Version tag data.
+ * @since 2.6
+ * @param aGpsVersion Returned Gps Version data.
+ * @return Error code.
+ */
+ TInt GetGpsVersion( TUint32& aGpsVersion ) const;
+
+ /**
+ * Parses the Jpeg primary image data and initializes the Jpeg primary
+ * image structures.
+ * @since 2.6
+ * @return void.
+ */
+ void ParseJpegDataL( const TDesC8& aJpegData );
+
+ private:
+
+ /**
+ * C++ default constructor.
+ */
+ CExifReadImpl();
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL( const TDesC8& aExifData, TBool aCreate, TUint aReadOption );
+
+ /**
+ * By default Symbian 2nd phase constructor is private.
+ */
+ void ConstructL();
+
+ private: // New functions
+
+ /**
+ * Parses the Exif data format and creates/initializes the internal
+ * Exif data structures.
+ * @since 2.6
+ * @return void.
+ */
+ void ParseExifFormatL();
+
+ /**
+ * Parses the IFD data according to the specified IFD type.
+ * Creates/initializes the internal IFD data structures.
+ * Returns the offset of the next IFD in the parameter.
+ * @since 2.6
+ * @param aIfdType The parsed IFD type
+ * @param aNextIfdOffset The next IFD offset returned.
+ * @return void.
+ */
+ void ParseIfdL( TExifIfdType aIfdType, TUint32& aNextIfdOffset );
+
+ /**
+ * Parses the Jpeg primary image data and initializes the Jpeg primary
+ * image structures.
+ * @since 2.6
+ * @return void.
+ */
+ void ParseJpegDataL();
+
+ /**
+ * Parses the Jpeg thumbnail image data and initializes the Jpeg
+ * thumbnail structures.
+ * @since 2.6
+ * @return void.
+ */
+ void ParseThumbnailL();
+
+ /**
+ * Reads the tag header, and returns the header information in the
+ * parameters.
+ * @since 2.6
+ * @param aTagId The tag ID read.
+ * @param aTagType The tag data type read
+ * @param aTagCount The number of tag data elements read.
+ * @return Error code.
+ */
+ TInt ReadTagHeader(
+ TUint16& aTagId,
+ TUint16& aTagType,
+ TUint32& aTagCount ) const;
+
+
+ private:
+
+ // Exif data reader/parser
+ CExifEndianBase* iReader;
+
+ // Core Exif data structure storing the IFDs and tags.
+ CExifCore* iExifCore;
+
+ private:
+
+ // CExifModifyImpl (only) needs to access iExifCore member of this
+ // class. Thus, it is defined as friend.
+ friend class CExifModifyImpl;
+
+ private:
+
+ // Exif read options
+ TUint iExifReadOption;
+
+ };
+
+#endif // EXIFREADIMPL_H
+
+// End of File