Data Structures
struct	imgreg_param
	image region parameters More...

Typedefs
typedef struct imgreg_param	imgreg_param_t
	image region parameters More...

Functions
imgreg_param_t	map_viewin2imgreg (const int fx, const int fy, const int rx, const int ry, const int rw, const int rh, const int XOsiz, const int YOsiz, const int Xsiz, const int Ysiz, const int numOfreslev)
	map view-window requests to codestream image resolutions and regions More...

void	find_level (int maxlev, int lev, int fx, int fy, int xmin, int ymin, int xmax, int *ymax)
	find deconposition level and its resolution size C.4.1 Mapping view-window requests to codestream image resolution and regions Note: only round-down implemented More...

int	comp_decomplev (int fw, int fh, int Xsiz, int Ysiz)
	compute decomposition level (only to get the level use find_level for all parameters More...

void	print_imgreg (imgreg_param_t imgreg)
	print image region parameters More...

Typedef Documentation

◆ imgreg_param_t

typedef struct imgreg_param imgreg_param_t

image region parameters

Function Documentation

◆ comp_decomplev()

int comp_decomplev	(	int	fw,
		int	fh,
		int	Xsiz,
		int	Ysiz
	)

compute decomposition level (only to get the level use find_level for all parameters

Parameters

[in]	fw	horizontal frame size
[in]	fh	vertical frame size
[in]	Xsiz	image width
[in]	Ysiz	image height

Returns: decomposition level

References find_level().

Referenced by recons_codestream_from_JPPstream(), and recons_codestream_from_JPTstream().

◆ find_level()

void find_level	(	int	maxlev,
		int *	lev,
		int *	fx,
		int *	fy,
		int *	xmin,
		int *	ymin,
		int *	xmax,
		int *	ymax
	)

find deconposition level and its resolution size C.4.1 Mapping view-window requests to codestream image resolution and regions Note: only round-down implemented

Parameters

[in]	maxlev	maximum decomposition level
[in,out]	lev	decomposition level pointer
[in,out]	fx	horizontal frame size pointer
[in,out]	fy	vertical frame size pointer
[in,out]	xmin	horizontal image offset pointer
[in,out]	ymin	vertical image offset pointer
[in,out]	xmax	horizontal image size pointer
[in,out]	ymax	vertical image size pointer

References FCGI_stderr, and find_level().

Referenced by comp_decomplev(), find_level(), and map_viewin2imgreg().

◆ map_viewin2imgreg()

imgreg_param_t map_viewin2imgreg	(	const int	fx,
		const int	fy,
		const int	rx,
		const int	ry,
		const int	rw,
		const int	rh,
		const int	XOsiz,
		const int	YOsiz,
		const int	Xsiz,
		const int	Ysiz,
		const int	numOfreslev
	)

map view-window requests to codestream image resolutions and regions

Parameters

[in]	fx,fy	frame size
[in]	rx,ry	offset of region
[in]	rw,rh	size of region
[in]	XOsiz,YOsiz	offset from the origin of the reference grid to the left side of the image area
[in]	Xsiz,Ysiz	size of the reference grid
[in]	numOfreslev	number of resolution levels