// Copyright (c) 2004-2009 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:

//

//#include <e32base.h>

#include <iclexif.h>

#include  "ExifTagDescriptions.h"

#include "ExifUtility.h"

/**

Constructor

Instantiates the exif reader utility.

Note: no method on this utility should be used after the metadate has been destroyed

@param aExifMetadata

	the metadata class on which to read the tags

*/

EXPORT_C TExifReaderUtility::TExifReaderUtility(MExifMetadataReader* aExifMetadata)

	: iExifRead(aExifMetadata)

	{

	}

// Getters

/**

Gets the make tag value of the metadata. 

@param aParam

	on return, the make value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetMake(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag010F[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the model tag value of the metadata. 

@param aParam

	on return, the model value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetModel(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0110[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the dateTime tag value of the metadata. 

@param aParam

	on return, the dateTime value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetDateTime(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0132[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the dateTimeOriginal tag value of the metadata. 

@param aParam

	on return, the dateTimeOriginal value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetDateTimeOriginal(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag9003[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the dateTimeDigitized tag value of the metadata. 

@param aParam

	on return, the dateTimeDigitized value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetDateTimeDigitized(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag9004[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the interoperabilityIndex tag value of the metadata. 

@param aParam

	on return, the interoperabilityIndex value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetInteroperabilityIndex(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0001[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the interoperabilityVersion tag value of the metadata. 

@param aParam

	on return, the interoperabilityVersion value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetInteroperabilityVersion(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0002[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the exifVersion tag value of the metadata. 

@param aParam

	on return, the exifVersion value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetExifVersion(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag9000[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the componentsConfiguration tag value of the metadata. 

@param aParam

	on return, the ComponentConfiguration value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetComponentsConfiguration(HBufC8*& aParam) const

	{	

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag9101[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the flashpixVersion tag value of the metadata. 

@param aParam

	on return, the flashpixVersion value

	Ownership of the buffer pointed to by aParam transfers to the client, which is therefore responsible for deleting the buffer when required. 

	Note: The client should always initialise aParam to NULL, and the plugin should only assign to this parameter when ready to transfer ownership.

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetFlashPixVersion(HBufC8*& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTagA000[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetParam8(tag, ifd, aParam);

	}

/**

Gets the main image xResolution tag value of the metadata. 

@param aNumerator

	on return, the main image xResolution numerator value

@param aDenominator

	on return, the main image xResolution denominator value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetXResolution(TInt& aNumerator, TInt& aDenominator) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag011A[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetRationalParam(tag, ifd, aNumerator, aDenominator);

	}

/**

Gets the main image yResolution tag value of the metadata. 

@param aNumerator

	on return, the main image yResolution numerator value

@param aDenominator

	on return, the main image yResolution denominator value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetYResolution(TInt& aNumerator, TInt& aDenominator) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag011B[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetRationalParam(tag, ifd, aNumerator, aDenominator);

	}

/**

Gets the thumbnail xResolution tag value of the metadata. 

@param aNumerator

	on return, the main thumbnail xResolution numerator value

@param aDenominator

	on return, the main thumbnail xResolution denominator value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetThumbXResolution(TInt& aNumerator, TInt& aDenominator) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KThumbTag011A[ETagValue];

	TInt ifd = KExifIfdOne;

	return iExifRead->GetRationalParam(tag, ifd, aNumerator, aDenominator);

	}

/**

Gets the thumbnail yResolution tag value of the metadata. 

@param aNumerator

	on return, the main thumbnail yResolution numerator value

@param aDenominator

	on return, the main thumbnail yResolution denominator value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetThumbYResolution(TInt& aNumerator, TInt& aDenominator) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KThumbTag011B[ETagValue];

	TInt ifd = KExifIfdOne;

	return iExifRead->GetRationalParam(tag, ifd, aNumerator, aDenominator);

	}

/**

Gets the main image resolutionUnit tag value of the metadata. 

@param aParam

	on return, the main image resolutionUnit value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetResolutionUnit(TUint16& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0128[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetShortParam(tag, ifd, aParam);

	}

/**

Gets the yCbCrPositioning tag value of the metadata. 

@param aParam

	on return, the yCbCrPositioning value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetYCbCrPositioning(TUint16& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0213[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetShortParam(tag, ifd, aParam);

	}

/**

Gets the main image orientation tag value of the metadata. 

@param aParam

	on return, the main image orientation value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/EXPORT_C TInt TExifReaderUtility::GetOrientation(TUint16& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTag0112[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetShortParam(tag, ifd, aParam);

	}

/**

Gets the colorSpace tag value of the metadata. 

@param aParam

	on return, the colorSpace value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetColorSpace(TUint16& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTagA001[ETagValue];

	TInt ifd = KExifIfdZero;

	return iExifRead->GetShortParam(tag, ifd, aParam);

	}

/**

Gets the pixelXDimension tag value of the metadata. 

@param aParam

	on return, the pixelXDimension value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetPixelXDimension(TInt& aParam) const

	{

	if(iExifRead==NULL)

		{

		return KErrOverflow;

		}

	TInt tag = KTagA002[ETagValue];

	TInt ifd = KExifIfdZero;

	//This tag can be SHORT or LONG so first try to read as integer if

	//that does not work then try as SHORT

	TInt err = iExifRead->GetIntegerParam(tag, ifd, aParam);

	if (err == KErrArgument)

		{

		//then the tag could be short

		TUint16 paramShort = 0;

		err = iExifRead->GetShortParam(tag, ifd, paramShort);

		if (err == KErrNone)

			{

			//tag was SHORT so set aParam

			aParam = static_cast<TInt>(paramShort);

			}

		else

			{

			err = KErrArgument; //just to ensure behaviour is unaltered from 9.x

			}

		}

	return err;

	}

/**

Gets the pixelYDimension tag value of the metadata. 

@param aParam

	on return, the pixelYDimension value

@return error code

	KErrArgument if the requested data type does not match with the tag.

	KErrNotSupported if called on an encoding module.

	KErrNotFound if the tag cannot be found.

*/

EXPORT_C TInt TExifReaderUtility::GetPixelYDimension(TInt& aParam) const