jpwl_lib.c File Reference

#include "../libopenjpeg/opj_includes.h"
#include <limits.h>

Defines
#define	MIN_V1   0.0
	Minimum and maximum values for the double->pfp conversion.
#define	MAX_V1   17293822569102704640.0
#define	MIN_V2   0.000030517578125
#define	MAX_V2   131040.0
Functions
unsigned short int	jpwl_double_to_pfp (double V, int bytes)
	conversion between a double precision floating point number and the corresponding pseudo-floating point used to represent sensitivity values
double	jpwl_pfp_to_double (unsigned short int em, int bytes)
	conversion between a pseudo-floating point used to represent sensitivity values and the corresponding double precision floating point number
int	jpwl_markcomp (const void *arg1, const void *arg2)
	this function is used to compare two JPWL markers based on their relevant wishlist position
int	jpwl_epbs_add (opj_j2k_t *j2k, jpwl_marker_t *jwmarker, int *jwmarker_num, bool latest, bool packed, bool insideMH, int *idx, int hprot, double place_pos, int tileno, unsigned long int pre_len, unsigned long int post_len)
	add a number of EPB marker segments
jpwl_epb_ms_t *	jpwl_epb_create (opj_j2k_t *j2k, bool latest, bool packed, int tileno, int idx, int hprot, unsigned long int pre_len, unsigned long int post_len)
	create an EPB marker segment
void	jpwl_epb_write (opj_j2k_t *j2k, jpwl_epb_ms_t *epb, unsigned char *buf)
	write an EPB MS to a buffer
jpwl_epc_ms_t *	jpwl_epc_create (opj_j2k_t *j2k, bool esd_on, bool red_on, bool epb_on, bool info_on)
	create an EPC marker segment
bool	jpwl_epb_fill (opj_j2k_t *j2k, jpwl_epb_ms_t *epb, unsigned char *buf, unsigned char *post_buf)
bool	jpwl_correct (opj_j2k_t *j2k)
	corrects the data in the JPWL codestream
bool	jpwl_epb_correct (opj_j2k_t *j2k, unsigned char *buffer, int type, int pre_len, int post_len, int *conn, unsigned char **L4_bufp)
	corrects the data protected by an EPB
void	jpwl_epc_write (opj_j2k_t *j2k, jpwl_epc_ms_t *epc, unsigned char *buf)
	write an EPC MS to a buffer
int	jpwl_esds_add (opj_j2k_t *j2k, jpwl_marker_t *jwmarker, int *jwmarker_num, int comps, unsigned char addrm, unsigned char ad_size, unsigned char senst, unsigned char se_size, double place_pos, int tileno)
	add a number of ESD marker segments
jpwl_esd_ms_t *	jpwl_esd_create (opj_j2k_t *j2k, int comp, unsigned char addrm, unsigned char ad_size, unsigned char senst, unsigned char se_size, int tileno, unsigned long int svalnum, void *sensval)
bool	jpwl_esd_fill (opj_j2k_t *j2k, jpwl_esd_ms_t *esd, unsigned char *buf)
void	jpwl_esd_write (opj_j2k_t *j2k, jpwl_esd_ms_t *esd, unsigned char *buf)
	write an ESD MS to a buffer
bool	jpwl_update_info (opj_j2k_t *j2k, jpwl_marker_t *jwmarker, int jwmarker_num)
	updates the information structure by modifying the positions and lengths

---

Define Documentation

#define MAX_V1   17293822569102704640.0

Referenced by jpwl_double_to_pfp(), and jpwl_esd_fill().

#define MAX_V2   131040.0

Referenced by jpwl_double_to_pfp().

#define MIN_V1   0.0

Minimum and maximum values for the double->pfp conversion.

Referenced by jpwl_double_to_pfp().

#define MIN_V2   0.000030517578125

Referenced by jpwl_double_to_pfp().

---

Function Documentation

unsigned short int jpwl_double_to_pfp	(	double	V,
		int	bytes
	)

conversion between a double precision floating point number and the corresponding pseudo-floating point used to represent sensitivity values

Parameters:

V

the double precision value Parameters: bytes  the number of bytes of the representation Returns: the pseudo-floating point value (cast accordingly)

References MAX_V1, MAX_V2, MIN_V1, and MIN_V2.

Referenced by jpwl_esd_fill().

void jpwl_epb_write	(	opj_j2k_t *	j2k,
		jpwl_epb_ms_t *	epbmark,
		unsigned char *	buf
	)

write an EPB MS to a buffer

Parameters:

j2k

J2K compressor handle Parameters: epbmark  pointer to the EPB MS Parameters: buf  pointer to the memory buffer

References opj_j2k::cstr_info, jpwl_epb_ms::Depb, j2k_add_marker(), J2K_MS_EPB, jpwl_epb_ms::LDPepb, jpwl_epb_ms::Lepb, and jpwl_epb_ms::Pepb.

Referenced by jpwl_dump_marks().

jpwl_epc_ms_t* jpwl_epc_create	(	opj_j2k_t *	j2k,
		bool	esd_on,
		bool	red_on,
		bool	epb_on,
		bool	info_on
	)

create an EPC marker segment

Parameters:

j2k

J2K compressor handle Parameters: esd_on  true if ESD is activated Parameters: red_on  true if RED is activated Parameters: epb_on  true if EPB is activated Parameters: info_on  true if informative techniques are activated Returns: returns the freshly created EPC

References opj_j2k::cinfo, opj_j2k::cp, jpwl_epc_ms::DL, opj_cp::epb_on, jpwl_epc_ms::epb_on, opj_cp::esd_on, jpwl_epc_ms::esd_on, EVT_ERROR, opj_cp::info_on, jpwl_epc_ms::info_on, jpwl_epc_ms::Lepc, opj_event_msg(), jpwl_epc_ms::Pcrc, jpwl_epc_ms::Pepc, opj_cp::red_on, and jpwl_epc_ms::red_on.

Referenced by jpwl_prepare_marks().

void jpwl_epc_write	(	opj_j2k_t *	j2k,
		jpwl_epc_ms_t *	epcmark,
		unsigned char *	buf
	)

write an EPC MS to a buffer

Parameters:

j2k

J2K compressor handle Parameters: epcmark  pointer to the EPC MS Parameters: buf  pointer to the memory buffer

References opj_j2k::cstr_info, jpwl_epc_ms::DL, j2k_add_marker(), J2K_MS_EPC, jpwl_epc_ms::Lepc, jpwl_epc_ms::Pcrc, and jpwl_epc_ms::Pepc.

Referenced by jpwl_dump_marks().

jpwl_esd_ms_t* jpwl_esd_create	(	opj_j2k_t *	j2k,
		int	comp,
		unsigned char	addrm,
		unsigned char	ad_size,
		unsigned char	senst,
		unsigned char	se_size,
		int	tileno,
		unsigned long int	svalnum,
		void *	sensval
	)

References jpwl_esd_ms::ad_size, jpwl_esd_ms::addrm, jpwl_esd_ms::Cesd, opj_j2k::cinfo, opj_codestream_info::codestream_size, opj_j2k::cstr_info, jpwl_esd_ms::data, EVT_ERROR, opj_j2k::image, jpwl_esd_ms::Lesd, opj_image::numcomps, jpwl_esd_ms::numcomps, opj_event_msg(), opj_codestream_info::packno, jpwl_esd_ms::Pesd, jpwl_esd_ms::se_size, jpwl_esd_ms::senst, jpwl_esd_ms::sensval_size, jpwl_esd_ms::svalnum, opj_codestream_info::th, jpwl_esd_ms::tileno, and opj_codestream_info::tw.

void jpwl_esd_write	(	opj_j2k_t *	j2k,
		jpwl_esd_ms_t *	esdmark,
		unsigned char *	buf
	)

write an ESD MS to a buffer

Parameters:

j2k

J2K compressor handle Parameters: esdmark  pointer to the ESD MS Parameters: buf  pointer to the memory buffer

References jpwl_esd_ms::Cesd, opj_j2k::cstr_info, j2k_add_marker(), J2K_MS_ESD, jpwl_esd_ms::Lesd, jpwl_esd_ms::numcomps, and jpwl_esd_ms::Pesd.

Referenced by jpwl_dump_marks().

int jpwl_markcomp	(	const void *	arg1,
		const void *	arg2
	)

this function is used to compare two JPWL markers based on their relevant wishlist position

Parameters:

arg1

pointer to first marker Parameters: arg2  pointer to second marker Returns: 1 if arg1>arg2, 0 if arg1=arg2, -1 if arg1<arg2

Referenced by jpwl_dump_marks().

double jpwl_pfp_to_double	(	unsigned short int	em,
		int	bytes
	)

conversion between a pseudo-floating point used to represent sensitivity values and the corresponding double precision floating point number

Parameters:

em

the pseudo-floating point value (cast accordingly) Parameters: bytes  the number of bytes of the representation Returns: the double precision value

Referenced by jpwl_esd_fill().