imginfo.c

用C语言实现的JPEG编码

/*
 * Copyright (c) 2001-2003 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 * 
 * JasPer Software License
 * 
 * IMAGE POWER JPEG-2000 PUBLIC LICENSE
 * ************************************
 * 
 * GRANT:
 * 
 * Permission is hereby granted, free of charge, to any person (the "User")
 * obtaining a copy of this software and associated documentation, to deal
 * in the JasPer Software without restriction, including without limitation
 * the right to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the JasPer Software (in source and binary forms),
 * and to permit persons to whom the JasPer Software is furnished to do so,
 * provided further that the License Conditions below are met.
 * 
 * License Conditions
 * ******************
 * 
 * A.  Redistributions of source code must retain the above copyright notice,
 * and this list of conditions, and the following disclaimer.
 * 
 * B.  Redistributions in binary form must reproduce the above copyright
 * notice, and this list of conditions, and the following disclaimer in
 * the documentation and/or other materials provided with the distribution.
 * 
 * C.  Neither the name of Image Power, Inc. nor any other contributor
 * (including, but not limited to, the University of British Columbia and
 * Michael David Adams) may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * D.  User agrees that it shall not commence any action against Image Power,
 * Inc., the University of British Columbia, Michael David Adams, or any
 * other contributors (collectively "Licensors") for infringement of any
 * intellectual property rights ("IPR") held by the User in respect of any
 * technology that User owns or has a right to license or sublicense and
 * which is an element required in order to claim compliance with ISO/IEC
 * 15444-1 (i.e., JPEG-2000 Part 1).  "IPR" means all intellectual property
 * rights worldwide arising under statutory or common law, and whether
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 * renewals, reissues and extensions of the foregoing (as and to the extent
 * applicable) now existing, hereafter filed, issued or acquired.
 * 
 * E.  If User commences an infringement action against any Licensor(s) then
 * such Licensor(s) shall have the right to terminate User's license and
 * all sublicenses that have been granted hereunder by User to other parties.
 * 
 * F.  This software is for use only in hardware or software products that
 * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1).  No license
 * or right to this Software is granted for products that do not comply
 * with ISO/IEC 15444-1.  The JPEG-2000 Part 1 standard can be purchased
 * from the ISO.
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 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
 * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND
 * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION,
 * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE,
 * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING.  THOSE INTENDING
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 * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE
 * IS WITH THE USER.  SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE
 * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY
 * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY
 * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING,
 * REPAIR OR CORRECTION.  UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY,
 * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE
 * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC.,
 * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE
 * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO
 * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
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 * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR
 * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF
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 * OF SUCH DAMAGES.  THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT
 * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR
 * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING
 * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES,
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 * ("HIGH RISK ACTIVITIES").  LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS
 * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.  USER WILL NOT
 * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING
 * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS
 * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE
 * NOTICE SPECIFIED IN THIS SECTION.
 * 
 * __END_OF_JASPER_LICENSE__
 */

/*
 * Image Information Program
 *
 * $Id$
 */

/******************************************************************************\
* Includes.
\******************************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <float.h>
#include <assert.h>

#include <jasper/jasper.h>

/******************************************************************************\
*
\******************************************************************************/

typedef enum {
	OPT_HELP,
	OPT_VERSION,
	OPT_VERBOSE,
	OPT_INFILE
} optid_t;

/******************************************************************************\
*
\******************************************************************************/

static void usage(void);
static void cmdinfo(void);

/******************************************************************************\
*
\******************************************************************************/

static jas_opt_t opts[] = {
	{OPT_HELP, "help", 0},
	{OPT_VERSION, "version", 0},
	{OPT_VERBOSE, "verbose", 0},
	{OPT_INFILE, "f", JAS_OPT_HASARG},
	{-1, 0, 0}
};

static char *cmdname = 0;

/******************************************************************************\
* Main program.
\******************************************************************************/

int main(int argc, char **argv)
{
	int fmtid;
	int id;
	char *infile;
	jas_stream_t *instream;
	jas_image_t *image;
	int width;
	int height;
	int depth;
	int numcmpts;
	int verbose;
	char *fmtname;

	if (jas_init()) {
		abort();
	}

	cmdname = argv[0];

	infile = 0;
	verbose = 0;

	/* Parse the command line options. */
	while ((id = jas_getopt(argc, argv, opts)) >= 0) {
		switch (id) {
		case OPT_VERBOSE:
			verbose = 1;
			break;
		case OPT_VERSION:
			printf("%s\n", JAS_VERSION);
			exit(EXIT_SUCCESS);
			break;
		case OPT_INFILE:
			infile = jas_optarg;
			break;
		case OPT_HELP:
		default:
			usage();
			break;
		}
	}

	/* Open the image file. */
	if (infile) {
		/* The image is to be read from a file. */
		if (!(instream = jas_stream_fopen(infile, "rb"))) {
			fprintf(stderr, "cannot open input image file %s\n", infile);
			exit(EXIT_FAILURE);
		}
	} else {
		/* The image is to be read from standard input. */
		if (!(instream = jas_stream_fdopen(0, "rb"))) {
			fprintf(stderr, "cannot open standard input\n");
			exit(EXIT_FAILURE);
		}
	}

	if ((fmtid = jas_image_getfmt(instream)) < 0) {
		fprintf(stderr, "unknown image format\n");
	}

	/* Decode the image. */
	if (!(image = jas_image_decode(instream, fmtid, 0))) {
		fprintf(stderr, "cannot load image\n");
		return EXIT_FAILURE;
	}

	/* Close the image file. */
	jas_stream_close(instream);

	numcmpts = jas_image_numcmpts(image);
	width = jas_image_cmptwidth(image, 0);
	height = jas_image_cmptheight(image, 0);
	depth = jas_image_cmptprec(image, 0);
	if (!(fmtname = jas_image_fmttostr(fmtid))) {
		abort();
	}
	printf("%s %d %d %d %d %ld\n", fmtname, numcmpts, width, height, depth, (long) jas_image_rawsize(image));

	jas_image_destroy(image);
	jas_image_clearfmts();

	return EXIT_SUCCESS;
}

/******************************************************************************\
*
\******************************************************************************/

static void cmdinfo()
{
	fprintf(stderr, "Image Information Utility (Version %s).\n",
	  JAS_VERSION);
	fprintf(stderr,
	  "Copyright (c) 2001 Michael David Adams.\n"
	  "All rights reserved.\n"
	  );
}

static void usage()
{
	cmdinfo();
	fprintf(stderr, "usage:\n");
	fprintf(stderr,"%s ", cmdname);
	fprintf(stderr, "[-f image_file]\n");
	exit(EXIT_FAILURE);
}