.TH "jpcunpack.c" 3 "Fri Jun 3 2022" "Version 1.6.4" "NCEPLIBS-g2c" \" -*- nroff -*-
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.SH NAME
jpcunpack.c \- Unpack a data field that was packed into a JPEG2000 code stream\&.  

.SH SYNOPSIS
.br
.PP
\fC#include <stdio\&.h>\fP
.br
\fC#include <stdlib\&.h>\fP
.br
\fC#include 'grib2\&.h'\fP
.br

.SS "Functions"

.in +1c
.ti -1c
.RI "int \fBdec_jpeg2000\fP (char *, \fBg2int\fP, \fBg2int\fP *)"
.br
.RI "This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i\&.e\&., ISO/IEC 15444-1) using JasPer Software version 1\&.500\&.4 (or 1\&.700\&.2) written by the University of British Columbia and Image Power Inc, and others\&. "
.ti -1c
.RI "\fBg2int\fP \fBjpcunpack\fP (unsigned char *cpack, \fBg2int\fP len, \fBg2int\fP *idrstmpl, \fBg2int\fP ndpts, \fBg2float\fP *fld)"
.br
.RI "This subroutine unpacks a data field that was packed into a JPEG2000 code stream using info from the GRIB2 Data Representation Template 5\&.40 or 5\&.40000\&. "
.in -1c
.SH "Detailed Description"
.PP 
Unpack a data field that was packed into a JPEG2000 code stream\&. 


.PP
\fBAuthor\fP
.RS 4
Stephem Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2003-08-27 
.RE
.PP

.PP
Definition in file \fBjpcunpack\&.c\fP\&.
.SH "Function Documentation"
.PP 
.SS "int dec_jpeg2000 (char * injpc, \fBg2int\fP bufsize, \fBg2int\fP * outfld)"

.PP
This Function decodes a JPEG2000 code stream specified in the JPEG2000 Part-1 standard (i\&.e\&., ISO/IEC 15444-1) using JasPer Software version 1\&.500\&.4 (or 1\&.700\&.2) written by the University of British Columbia and Image Power Inc, and others\&. JasPer is available at http://www.ece.uvic.ca/~mdadams/jasper/\&.
.PP
\fBParameters\fP
.RS 4
\fIinjpc\fP Input JPEG2000 code stream\&. 
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\fIbufsize\fP Length (in bytes) of the input JPEG2000 code stream\&.
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\fIoutfld\fP Output matrix of grayscale image values\&.
.RE
.PP
\fBReturns\fP
.RS 4
.IP "\(bu" 2
0 Successful decode
.IP "\(bu" 2
-3 Error decode jpeg2000 code stream\&.
.IP "\(bu" 2
-5 decoded image had multiple color components\&. Only grayscale is expected\&.
.PP
.RE
.PP
\fBNote\fP
.RS 4
Requires JasPer Software version 1\&.500\&.4 or 1\&.700\&.2\&.
.RE
.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2002-12-02 
.RE
.PP

.PP
Definition at line 43 of file dec_jpeg2000\&.c\&.
.PP
Referenced by jpcunpack()\&.
.SS "\fBg2int\fP jpcunpack (unsigned char * cpack, \fBg2int\fP len, \fBg2int\fP * idrstmpl, \fBg2int\fP ndpts, \fBg2float\fP * fld)"

.PP
This subroutine unpacks a data field that was packed into a JPEG2000 code stream using info from the GRIB2 Data Representation Template 5\&.40 or 5\&.40000\&. 
.PP
\fBParameters\fP
.RS 4
\fIcpack\fP The packed data field (character*1 array)\&. 
.br
\fIlen\fP length of packed field cpack\&. 
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\fIidrstmpl\fP Pointer to array of values for Data Representation Template 5\&.40 or 5\&.40000\&. 
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\fIndpts\fP The number of data values to unpack\&. 
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\fIfld\fP Contains the unpacked data values\&.
.RE
.PP
\fBReturns\fP
.RS 4
0 for success, 1 for memory allocation error\&.
.RE
.PP
\fBAuthor\fP
.RS 4
Stephem Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2003-08-27 
.RE
.PP

.PP
Definition at line 29 of file jpcunpack\&.c\&.
.PP
References dec_jpeg2000(), int_power(), and rdieee()\&.
.PP
Referenced by g2_unpack7()\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for NCEPLIBS-g2c from the source code\&.