jpwl.c File Reference

#include "opj_includes.h"

Functions
jpwl_esd_ms_t *	jpwl_esd_create (opj_j2k_t *j2k, int comps, unsigned char addrm, unsigned char ad_size, unsigned char senst, int se_size, int tileno, unsigned long int svalnum, void *sensval)
	create an EPC marker segment More...
int	jpwl_markcomp (const void *arg1, const void *arg2)
	this function is used to compare two JPWL markers based on their relevant wishlist position More...
void	jpwl_epb_write (opj_j2k_t *j2k, jpwl_epb_ms_t *epbmark, unsigned char *buf)
	write an EPB MS to a buffer More...
void	jpwl_epc_write (opj_j2k_t *j2k, jpwl_epc_ms_t *epcmark, unsigned char *buf)
	write an EPC MS to a buffer More...
void	jpwl_esd_write (opj_j2k_t *j2k, jpwl_esd_ms_t *esdmark, unsigned char *buf)
	write an ESD MS to a buffer More...
void	jpwl_encode (opj_j2k_t *j2k, opj_cio_t *cio, opj_image_t *image)
	Encode according to JPWL specs More...
void	j2k_add_marker (opj_codestream_info_t *cstr_info, unsigned short int type, int pos, int len)
void	jpwl_prepare_marks (opj_j2k_t *j2k, opj_cio_t *cio, opj_image_t *image)
	Prepare the list of JPWL markers, after the Part 1 codestream has been finalized (index struct is full) More...
void	jpwl_dump_marks (opj_j2k_t *j2k, opj_cio_t *cio, opj_image_t *image)
	Dump the list of JPWL markers, after it has been prepared More...
void	j2k_read_epc (opj_j2k_t *j2k)
	Read the EPC marker (Error Protection Capability) More...
void	j2k_write_epc (opj_j2k_t *j2k)
	Write the EPC marker (Error Protection Capability), BUT the DL field is always set to 0 (this simplifies the management of EPBs and it is openly stated in the standard as a possible value, mening that the information is not available) and the informative techniques are not yet implemented More...
void	j2k_read_epb (opj_j2k_t *j2k)
	Read the EPB marker (Error Protection Block) More...
void	j2k_write_epb (opj_j2k_t *j2k)
	Write the EPB marker (Error Protection Block) More...
void	j2k_read_esd (opj_j2k_t *j2k)
	Read the ESD marker (Error Sensitivity Descriptor) More...
void	j2k_read_red (opj_j2k_t *j2k)
	Read the RED marker (Residual Error Descriptor) More...
opj_bool	jpwl_check_tile (opj_j2k_t *j2k, opj_tcd_t *tcd, int tileno)
	check that a tile and its children have valid data More...
Local static functions
jpwl_epc_ms_t *	jpwl_epc_create (opj_j2k_t *j2k, opj_bool esd_on, opj_bool red_on, opj_bool epb_on, opj_bool info_on)
	create an EPC marker segment More...
void	j2k_read_sec (opj_j2k_t *j2k)
	Read the SEC marker (SEcured Codestream) More...
void	j2k_write_sec (opj_j2k_t *j2k)
	Write the SEC marker (SEcured Codestream) More...
void	j2k_read_insec (opj_j2k_t *j2k)
	Read the INSEC marker (SEcured Codestream) More...

Variables
Local static variables
static int	jwmarker_num
	number of JPWL prepared markers More...
static jpwl_marker_t	jwmarker [JPWL_MAX_NO_MARKERS]
	properties of JPWL markers to insert More...

Function Documentation

jpwl_epb_write()

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
epbmark	pointer to the EPB MS
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_create()

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

create an EPC marker segment

Parameters

j2k	J2K compressor handle
esd_on	true if ESD is activated
red_on	true if RED is activated
epb_on	true if EPB is activated
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, jpwl_epc_ms::epb_on, opj_cp::epb_on, jpwl_epc_ms::esd_on, opj_cp::esd_on, EVT_ERROR, jpwl_epc_ms::info_on, opj_cp::info_on, jpwl_epc_ms::Lepc, opj_event_msg(), opj_malloc, jpwl_epc_ms::Pcrc, jpwl_epc_ms::Pepc, jpwl_epc_ms::red_on, and opj_cp::red_on.

Referenced by jpwl_prepare_marks().

jpwl_epc_write()

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
epcmark	pointer to the EPC MS
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_create()

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

create an EPC marker segment

Parameters

j2k	J2K compressor handle
comps	considered component (-1=average, 0/1/2/...=component no.)
addrm	addressing mode (0=packet, 1=byte range, 2=packet range, 3=reserved)
ad_size	size of addresses (2/4 bytes)
senst	sensitivity type
se_size	sensitivity values size (1/2 bytes)
tileno	tile where this ESD lies (-1 means MH)
svalnum	number of sensitivity values (if 0, they will be automatically filled)
sensval	pointer to an array of sensitivity values (if NULL, they will be automatically filled)

Returns

returns the freshly created ESD

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, jpwl_esd_ms::numcomps, opj_image::numcomps, opj_event_msg(), opj_malloc, 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.

Referenced by jpwl_prepare_marks().

jpwl_esd_write()

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
esdmark	pointer to the ESD MS
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().

jpwl_markcomp()

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
arg2	pointer to second marker

Returns

1 if arg1>arg2, 0 if arg1=arg2, -1 if arg1<arg2

Referenced by jpwl_dump_marks().