OpenJPEG: byte_manager.h File Reference

OpenJPEG 2.3.1

#include <stddef.h>
#include "openjpeg.h"
#include "opj_stdint.h"

Go to the source code of this file.

Typedefs
typedef uint8_t	Byte_t

typedef uint16_t	Byte2_t

typedef uint32_t	Byte4_t

typedef uint64_t	Byte8_t

Functions
Byte_t *	fetch_bytes (int fd, OPJ_OFF_T offset, OPJ_SIZE_T size)
	fetch bytes of data in file stream More...

Byte_t	fetch_1byte (int fd, OPJ_OFF_T offset)
	fetch a 1-byte Byte codes in file stream More...

Byte2_t	fetch_2bytebigendian (int fd, OPJ_OFF_T offset)
	fetch a 2-byte big endian Byte codes in file stream More...

Byte4_t	fetch_4bytebigendian (int fd, OPJ_OFF_T offset)
	fetch a 4-byte big endian Byte codes in file stream More...

Byte8_t	fetch_8bytebigendian (int fd, OPJ_OFF_T offset)
	fetch a 8-byte big endian Byte codes in file stream More...

Byte2_t	big2 (Byte_t *buf)
	convert 2-byte big endian Byte codes to number More...

Byte4_t	big4 (Byte_t *buf)
	convert 4-byte big endian Byte codes to number More...

Byte8_t	big8 (Byte_t *buf)
	convert 8-byte big endian Byte codes to number More...

void	modify_4Bytecode (Byte4_t code, Byte_t *stream)
	modify 4Byte code in a codestream More...

OPJ_OFF_T	get_filesize (int fd)
	Get file size. More...

Typedef Documentation

◆ Byte2_t

typedef uint16_t Byte2_t

◆ Byte4_t

typedef uint32_t Byte4_t

◆ Byte8_t

typedef uint64_t Byte8_t

◆ Byte_t

typedef uint8_t Byte_t

Function Documentation

◆ big2()

Byte2_t big2 ( Byte_t * buf )

convert 2-byte big endian Byte codes to number

Parameters

[in] buf Byte codes

Returns: resolved number

Referenced by fetch_2bytebigendian(), gene_ihdrbox(), get_CODmkrdata_from_j2kstream(), get_mainheader_from_j2kstream(), get_SIZmkrdata_from_j2kstream(), and modify_COCmkrstream().

◆ big4()

Byte4_t big4 ( Byte_t * buf )

convert 4-byte big endian Byte codes to number

Parameters

[in] buf Byte codes

Returns: resolved number

Referenced by add_emptyboxstream(), big8(), fetch_4bytebigendian(), gene_boxbyOffinStream(), gene_boxbyOffset(), gene_boxbyType(), gene_boxbyTypeinStream(), gene_ihdrbox(), get_SIZmkrdata_from_j2kstream(), and parse_phld().

◆ big8()

Byte8_t big8 ( Byte_t * buf )

convert 8-byte big endian Byte codes to number

Parameters

[in] buf Byte codes

Returns: resolved number

References big4().

Referenced by add_emptyboxstream(), fetch_8bytebigendian(), gene_boxbyOffinStream(), gene_boxbyOffset(), gene_boxbyType(), gene_boxbyTypeinStream(), and parse_phld().

◆ fetch_1byte()

Byte_t fetch_1byte	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 1-byte Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns: fetched codes

References FCGI_stderr, and FCGI_stdout.

Referenced by fetch_codestream1byte(), and fetch_DBox1byte().

◆ fetch_2bytebigendian()

Byte2_t fetch_2bytebigendian	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 2-byte big endian Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns: fetched codes

References big2(), FCGI_stderr, and fetch_bytes().

Referenced by fetch_codestream2bytebigendian(), and fetch_DBox2bytebigendian().

◆ fetch_4bytebigendian()

Byte4_t fetch_4bytebigendian	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 4-byte big endian Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns: fetched codes

References big4(), FCGI_stderr, and fetch_bytes().

Referenced by fetch_codestream4bytebigendian(), fetch_DBox4bytebigendian(), and gene_boxheader().

◆ fetch_8bytebigendian()

Byte8_t fetch_8bytebigendian	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 8-byte big endian Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns: fetched codes

References big8(), FCGI_stderr, and fetch_bytes().

Referenced by fetch_DBox8bytebigendian(), and gene_boxheader().

◆ fetch_bytes()

Byte_t* fetch_bytes	(	int	fd,
		OPJ_OFF_T	offset,
		OPJ_SIZE_T	size
	)

fetch bytes of data in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position
[in]	size	Byte length

Returns: pointer to the fetched data

References FCGI_stderr, and FCGI_stdout.

Referenced by add_body_stream(), fetch_2bytebigendian(), fetch_4bytebigendian(), fetch_8bytebigendian(), fetch_codestreambytes(), fetch_DBoxbytes(), fetch_headbytes(), gene_boxbyOffset(), gene_boxbyType(), and gene_boxheader().

◆ get_filesize()

OPJ_OFF_T get_filesize ( int fd )

Get file size.

Parameters

[in] fd file discriptor

Returns: file size

References FCGI_stderr, and FCGI_stdout.

Referenced by const_metadatalist(), fread_jpip(), gene_boxbyType(), and parse_jp2file().

◆ modify_4Bytecode()

void modify_4Bytecode	(	Byte4_t	code,
		Byte_t *	stream
	)

modify 4Byte code in a codestream

Parameters

[in]	code	code value
[out]	stream	modifying codestream

Referenced by modify_SIZmkrstream(), and modify_tileheader().