jpcunpack.c File Reference

Unpack a data field that was packed into a JPEG2000 code stream. More...

#include <stdio.h>
#include <stdlib.h>
#include "grib2_int.h"

Go to the source code of this file.

Functions
g2int	jpcunpack (unsigned char *cpack, g2int len, g2int *idrstmpl, g2int ndpts, float *fld)
	Unpack JPEG2000 compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.40 or 5.40000. More...
static g2int	jpcunpack_int (unsigned char *cpack, g2int len, g2int *idrstmpl, g2int ndpts, void *fld, int fld_is_double)
	Unpack JPEG2000 compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.40 or 5.40000. More...
g2int	jpcunpackd (unsigned char *cpack, g2int len, g2int *idrstmpl, g2int ndpts, double *fld)
	Unpack JPEG2000 compressed data into an array of doubles, using info from the GRIB2 Data Representation Template 5.40 or 5.40000. More...

Detailed Description

Unpack a data field that was packed into a JPEG2000 code stream.

Author

Stephem Gilbert

Date

2003-08-27

Definition in file jpcunpack.c.

Function Documentation

jpcunpack()

g2int jpcunpack	(	unsigned char *	cpack,
		g2int	len,
		g2int *	idrstmpl,
		g2int	ndpts,
		float *	fld
	)

Unpack JPEG2000 compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.40 or 5.40000.

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.40 or 5.40000.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values as an array of float.

Returns

0 for success, 1 for memory allocation error.

Author

Stephem Gilbert

Date

2003-08-27

Author

Ed Hartnett

Definition at line 108 of file jpcunpack.c.

References jpcunpack_int().

Referenced by g2_unpack7().

jpcunpack_int()

static g2int jpcunpack_int ( unsigned char *  cpack, g2int  len, g2int *  idrstmpl, g2int  ndpts, void *  fld, int  fld_is_double  )

static

Unpack JPEG2000 compressed data into an array of floats, using info from the GRIB2 Data Representation Template 5.40 or 5.40000.

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.40 or 5.40000.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values.
fld_is_double	Non-zero if the data are to be unpacked into a double array, otherwise data will be unpacked into a float array.

Returns

0 for success, 1 for memory allocation error.

Author

Stephem Gilbert

Date

2003-08-27

Author

Ed Hartnett

Definition at line 33 of file jpcunpack.c.

References dec_jpeg2000(), G2_JPCUNPACK_MEM, G2_NO_ERROR, int_power(), and rdieee().

Referenced by jpcunpack(), and jpcunpackd().

jpcunpackd()

g2int jpcunpackd	(	unsigned char *	cpack,
		g2int	len,
		g2int *	idrstmpl,
		g2int	ndpts,
		double *	fld
	)

Unpack JPEG2000 compressed data into an array of doubles, using info from the GRIB2 Data Representation Template 5.40 or 5.40000.

Parameters

cpack	The packed data.
len	The length of the packed data.
idrstmpl	Pointer to array of values for Data Representation Template 5.40 or 5.40000.
ndpts	The number of data values to unpack.
fld	A pointer that gets the unpacked data values as an array of double.

Returns

0 for success, 1 for memory allocation error.

Author

Ed Hartnett

Date

2022-08-12

Definition at line 135 of file jpcunpack.c.

References jpcunpack_int().