OpenRaw::Internals::IFDFileContainer Class Reference

Inheritance diagram for OpenRaw::Internals::IFDFileContainer:

Public Types
enum	{ IFD_NONE = -1, IFD_EXIF = -2, IFD_GPS = -3, IFD_INTEROP = -4 }
Public Types inherited from OpenRaw::Internals::RawContainer
enum	EndianType { ENDIAN_NULL = 0, ENDIAN_BIG, ENDIAN_LITTLE }

Public Member Functions
	IFDFileContainer (IO::Stream *file, off_t offset)
virtual	~IFDFileContainer ()
virtual EndianType	isMagicHeader (const char *p, int len)
IFDDir::Ref	setDirectory (int dir)
int	countDirectories (void)
std::vector< IFDDir::Ref > &	directories ()
int	currentDirectory ()
size_t	getDirectoryDataSize ()
int	lastError () const
int	exifOffsetCorrection () const
void	setExifOffsetCorrection (int corr)
Public Member Functions inherited from OpenRaw::Internals::RawContainer
	RawContainer (IO::Stream *_file, off_t offset)
virtual	~RawContainer ()
IO::Stream *	file ()
EndianType	endian () const
bool	readInt8 (IO::Stream *f, int8_t &v)
bool	readUInt8 (IO::Stream *f, uint8_t &v)
bool	readInt16 (IO::Stream *f, int16_t &v)
bool	readInt32 (IO::Stream *f, int32_t &v)
bool	readUInt16 (IO::Stream *f, uint16_t &v)
bool	readUInt32 (IO::Stream *f, uint32_t &v)
size_t	fetchData (void *buf, const off_t offset, const size_t buf_size)

Protected Member Functions
virtual bool	locateDirsPreHook ()
Protected Member Functions inherited from OpenRaw::Internals::RawContainer
	RawContainer (const RawContainer &)
RawContainer &	operator= (const RawContainer &)
void	setEndian (EndianType _endian)

Additional Inherited Members
Protected Attributes inherited from OpenRaw::Internals::RawContainer
IO::Stream *	m_file
off_t	m_offset
EndianType	m_endian

Detailed Description

Definition at line 45 of file ifdfilecontainer.h.

Member Enumeration Documentation

anonymous enum

anonymous enum

due to the way Exif works, we have to set specific index to address these IFD

Enumerator
IFD_NONE	invalid IFD. Means an error
IFD_EXIF	exif IFD: see field 0x6789 in IFD 0
IFD_GPS	GPS IFD: see field 0x8825 in IFD 0
IFD_INTEROP	interoperability IFD: see field 0xa005 in exif IFD

Definition at line 62 of file ifdfilecontainer.h.

Constructor & Destructor Documentation

IFDFileContainer()

OpenRaw::Internals::IFDFileContainer::IFDFileContainer	(	IO::Stream *	file,
		off_t	offset
	)

constructor

Parameters

file	the file handle
offset	the offset from the start of the file

Definition at line 40 of file ifdfilecontainer.cpp.

~IFDFileContainer()

OpenRaw::Internals::IFDFileContainer::~IFDFileContainer ( )

virtual

destructor

Definition at line 49 of file ifdfilecontainer.cpp.

Member Function Documentation

countDirectories()

int OpenRaw::Internals::IFDFileContainer::countDirectories

(

void

)

Count the number of image file directories, not including EXIF, GPS and INTEROP.

Returns

the number of image file directories

Definition at line 74 of file ifdfilecontainer.cpp.

Referenced by directories(), and setDirectory().

currentDirectory()

int OpenRaw::Internals::IFDFileContainer::currentDirectory

(

)

Get the number of the current directory

Returns

the index of the current directory. By default we are in directory 0. -1 indicates an initialized IFD file

directories()

std::vector< IFDDir::Ref > & OpenRaw::Internals::IFDFileContainer::directories

(

)

Get the directories, loading them if necessary

Returns

the directories

Definition at line 87 of file ifdfilecontainer.cpp.

References countDirectories().

Referenced by OpenRaw::Internals::IFDFile::_enumThumbnailSizes().

getDirectoryDataSize()

size_t OpenRaw::Internals::IFDFileContainer::getDirectoryDataSize

(

)

get the extra data size chunk associated to the current image directory

Returns

the size of the data chunk in bytes

Definition at line 121 of file ifdfilecontainer.cpp.

References OpenRaw::Internals::RawContainer::m_file, OpenRaw::Internals::RawContainer::readInt32(), and OpenRaw::IO::Stream::seek().

isMagicHeader()

IFDFileContainer::EndianType OpenRaw::Internals::IFDFileContainer::isMagicHeader ( const char *  p, int  len  )

virtual

Check the IFD magic header

Parameters

p	the pointer to check
len	the length of the block to check. Likely to be at least 4.

Returns

the endian if it is the magic header

subclasses needs to override it for like Olympus RAW

Reimplemented in OpenRaw::Internals::MRWContainer, and OpenRaw::Internals::OrfContainer.

Definition at line 56 of file ifdfilecontainer.cpp.

References OpenRaw::Internals::RawContainer::ENDIAN_BIG, and OpenRaw::Internals::RawContainer::ENDIAN_LITTLE.

lastError()

int OpenRaw::Internals::IFDFileContainer::lastError ( ) const

inline

Return the last error

Returns

the error code

Definition at line 116 of file ifdfilecontainer.h.

locateDirsPreHook()

bool OpenRaw::Internals::IFDFileContainer::locateDirsPreHook ( )

protectedvirtual

hook to be called at the start of _locateDirs()

Reimplemented in OpenRaw::Internals::MRWContainer.

Definition at line 144 of file ifdfilecontainer.cpp.

setDirectory()

IFDDir::Ref OpenRaw::Internals::IFDFileContainer::setDirectory

(

int

dir

)

Set the current directory

Parameters

dir	the index of the directory to read, or one of the specific IFD index values that are < -1

Returns

NULL if no error, or return the reference to the current directory

Definition at line 96 of file ifdfilecontainer.cpp.

References countDirectories().

---

The documentation for this class was generated from the following files:

• lib/ifdfilecontainer.h
• lib/ifdfilecontainer.cpp