dec_jpeg2000.c File Reference

Decodes JPEG2000 code stream. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "grib2_int.h"
#include "jasper/jasper.h"

Go to the source code of this file.

Functions
int	dec_jpeg2000 (char *injpc, g2int bufsize, g2int *outfld)
	This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i.e., ISO/IEC 15444-1) using JasPer Software. More...
int	g2c_dec_jpeg2000 (char *injpc, size_t bufsize, int *outfld)
	This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i.e., ISO/IEC 15444-1) using JasPer Software. More...
static int	int_dec_jpeg2000 (char *injpc, g2int bufsize, void *outfld, int out_is_g2int)
	This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i.e., ISO/IEC 15444-1) using JasPer Software. More...

Detailed Description

Decodes JPEG2000 code stream.

Author

Stephen Gilbert

Date

2002-12-02

Program History Log

Date	Programmer	Comments
2002-12-02	Gilbert	Initial
2022-04-15	Hartnett	Converted to use jas_ instead of jpc_ functions.

Definition in file dec_jpeg2000.c.

Function Documentation

dec_jpeg2000()

int dec_jpeg2000	(	char *	injpc,
		g2int	bufsize,
		g2int *	outfld
	)

This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i.e., ISO/IEC 15444-1) using JasPer Software.

Parameters

injpc	Pointer to buffer that holds the input JPEG2000 code stream.
bufsize	Length (in bytes) of the buffer that holds the input JPEG2000 code stream.
outfld	Pointer to g2int array, already allocated, that gets the unpacked data.

Returns

• 0 Successful decode
• G2_JASPER_DECODE Error decode jpeg2000 code stream.
• G2_JASPER_DECODE_COLOR decoded image had multiple color components. Only grayscale is expected.
• G2_JASPER_INIT Error inializing Jasper library.

Author

Stephen Gilbert, Ed Hartnett

Definition at line 201 of file dec_jpeg2000.c.

References int_dec_jpeg2000().

Referenced by jpcunpack_int().

g2c_dec_jpeg2000()

int g2c_dec_jpeg2000	(	char *	injpc,
		size_t	bufsize,
		int *	outfld
	)

This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i.e., ISO/IEC 15444-1) using JasPer Software.

Parameters

injpc	Pointer to buffer that holds the input JPEG2000 code stream.
bufsize	Length (in bytes) of the buffer that holds the input JPEG2000 code stream.
outfld	Pointer to int array, already allocated, that gets the unpacked data.

Returns

• G2C_NOERROR No error.
• G2_JASPER_DECODE Error decode jpeg2000 code stream.
• G2_JASPER_DECODE_COLOR decoded image had multiple color components. Only grayscale is expected.
• G2_JASPER_INIT Error inializing Jasper library.

Author

Ed Hartnett

Date

9/7/22

Definition at line 174 of file dec_jpeg2000.c.

References int_dec_jpeg2000().

int_dec_jpeg2000()

static int int_dec_jpeg2000 ( char *  injpc, g2int  bufsize, void *  outfld, int  out_is_g2int  )

static

This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i.e., ISO/IEC 15444-1) using JasPer Software.

Parameters

injpc	Pointer to buffer that holds the input JPEG2000 code stream.
bufsize	Length (in bytes) of the buffer that holds the input JPEG2000 code stream.
outfld	Pointer to either int or g2int array, already allocated, that gets the unpacked data.
out_is_g2int	Non-zero if the output array is of type g2int (i.e. 64-bit ints), zero if output is an int array (32-bits).

Returns

• 0 Successful decode
• G2_JASPER_DECODE Error decode jpeg2000 code stream.
• G2_JASPER_DECODE_COLOR decoded image had multiple color components. Only grayscale is expected.
• G2_JASPER_INIT Error inializing Jasper library.

Author

Stephen Gilbert

Date

2002-12-02

Author

Ed Hartnett

Eric Engle

Definition at line 44 of file dec_jpeg2000.c.

References G2_JASPER_DECODE, G2_JASPER_DECODE_COLOR, G2_JASPER_INIT, G2C_JASPER_JPEG_FORMAT_NAME, G2C_JASPER_MAX_MEM, and LOG.

Referenced by dec_jpeg2000(), and g2c_dec_jpeg2000().