tiff_common.h File Reference

TIFF Common Routines. More...

#include "avcodec.h"
#include "tiff.h"
#include "bytestream.h"
#include "libavutil/bprint.h"

Go to the source code of this file.

Enumerations
enum	TiffTypes {   TIFF_BYTE = 1, TIFF_STRING, TIFF_SHORT, TIFF_LONG,   TIFF_RATIONAL, TIFF_SBYTE, TIFF_UNDEFINED, TIFF_SSHORT,   TIFF_SLONG, TIFF_SRATIONAL, TIFF_FLOAT, TIFF_DOUBLE,   TIFF_IFD }
	data type identifiers for TIFF tags

Functions
int	ff_tis_ifd (unsigned tag)
	Returns a value > 0 if the tag is a known IFD-tag. More...
unsigned	ff_tget_short (GetByteContext *gb, int le)
	Reads a short from the bytestream using given endianness. More...
unsigned	ff_tget_long (GetByteContext *gb, int le)
	Reads a long from the bytestream using given endianness. More...
double	ff_tget_double (GetByteContext *gb, int le)
	Reads a double from the bytestream using given endianness. More...
unsigned	ff_tget (GetByteContext *gb, int type, int le)
	Reads a byte from the bytestream using given endianness. More...
char *	ff_trationals2str (int *rp, int count, const char *sep)
	Returns an allocated string containing count rational values using the given separator.
char *	ff_tlongs2str (int32_t *lp, int count, const char *sep)
	Returns an allocated string containing count long values using the given separator.
char *	ff_tdoubles2str (double *dp, int count, const char *sep)
	Returns an allocated string containing count double values using the given separator.
char *	ff_tshorts2str (int16_t *sp, int count, const char *sep)
	Returns an allocated string containing count short values using the given separator.
int	ff_tadd_rational_metadata (int count, const char *name, const char *sep, GetByteContext *gb, int le, AVDictionary **metadata)
	Adds count rationals converted to a string into the metadata dictionary.
int	ff_tadd_long_metadata (int count, const char *name, const char *sep, GetByteContext *gb, int le, AVDictionary **metadata)
	Adds count longs converted to a string into the metadata dictionary.
int	ff_tadd_doubles_metadata (int count, const char *name, const char *sep, GetByteContext *gb, int le, AVDictionary **metadata)
	Adds count doubles converted to a string into the metadata dictionary.
int	ff_tadd_shorts_metadata (int count, const char *name, const char *sep, GetByteContext *gb, int le, int is_signed, AVDictionary **metadata)
	Adds count shorts converted to a string into the metadata dictionary.
int	ff_tadd_bytes_metadata (int count, const char *name, const char *sep, GetByteContext *gb, int le, int is_signed, AVDictionary **metadata)
	Adds count bytes converted to a string into the metadata dictionary.
int	ff_tadd_string_metadata (int count, const char *name, GetByteContext *gb, int le, AVDictionary **metadata)
	Adds a string of count characters into the metadata dictionary.
int	ff_tdecode_header (GetByteContext *gb, int *le, int *ifd_offset)
	Decodes a TIFF header from the input bytestream and sets the endianness in *le and the offset to the first IFD in *ifd_offset accordingly.
int	ff_tread_tag (GetByteContext *gb, int le, unsigned *tag, unsigned *type, unsigned *count, int *next)
	Reads the first 3 fields of a TIFF tag, which are the tag id, the tag type and the count of values for that tag. More...

Detailed Description

TIFF Common Routines.

Author

Thilo Borgmann <thilo.borgmann at mail.de>

Function Documentation

ff_tget()

unsigned ff_tget	(	GetByteContext *	gb,
		int	type,
		int	le
	)

Reads a byte from the bytestream using given endianness.

ff_tget_double()

double ff_tget_double	(	GetByteContext *	gb,
		int	le
	)

Reads a double from the bytestream using given endianness.

ff_tget_long()

unsigned ff_tget_long	(	GetByteContext *	gb,
		int	le
	)

Reads a long from the bytestream using given endianness.

ff_tget_short()

unsigned ff_tget_short	(	GetByteContext *	gb,
		int	le
	)

Reads a short from the bytestream using given endianness.

ff_tis_ifd()

int ff_tis_ifd

(

unsigned

tag

)

Returns a value > 0 if the tag is a known IFD-tag.

The return value is the array index + 1 within ifd_tags[].

ff_tread_tag()

int ff_tread_tag	(	GetByteContext *	gb,
		int	le,
		unsigned *	tag,
		unsigned *	type,
		unsigned *	count,
		int *	next
	)

Reads the first 3 fields of a TIFF tag, which are the tag id, the tag type and the count of values for that tag.

Afterwards the bytestream is located at the first value to read and *next holds the bytestream offset of the following tag.