ref: f9e3d8813674fe45ec12a3b75f5ab9024747a41d
dir: /jbig2dec.c/
/*
jbig2dec
Copyright (C) 2001-2002 artofcode LLC.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
$Id: jbig2dec.c,v 1.31 2002/07/13 00:32:13 giles Exp $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#include "config_types.h"
#elif _WIN32
#include "config_win32.h"
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <stdio.h>
# include <stdlib.h>
# include <stddef.h>
# include <string.h>
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#else
# include "getopt.h"
#endif
#include "jbig2.h"
#include "jbig2_image.h"
typedef enum {
usage,dump,render
} jbig2dec_mode;
typedef struct {
jbig2dec_mode mode;
int verbose;
char *output_file;
} jbig2dec_params_t;
static int
print_usage (void)
{
fprintf(stderr,
"Usage: jbig2dec [options] <file.jbig2>\n"
" or jbig2dec [options] <global_stream> <page_stream>\n"
"\n"
" When invoked with a single file, it attempts to parse it as\n"
" a normal jbig2 file. Invoked with two files, it treats the\n"
" first as the global segments, and the second as the segment\n"
" stream for a particular page. This is useful for examining\n"
" embedded streams.\n"
"\n"
" available options:\n"
" -h --help this usage summary\n"
" -q --quiet suppress diagnostic output\n"
" -d --dump print the structure of the jbig2 file\n"
" rather than explicitly decoding\n"
" -o <file> send decoded output to <file>\n"
" Defaults to the the input with a different\n"
" extension. Pass '-' for stdout.\n"
"\n"
);
return 1;
}
static int
parse_options(int argc, char *argv[], jbig2dec_params_t *params)
{
static struct option long_options[] = {
{"quiet", 0, NULL, 'q'},
{"help", 0, NULL, 'h'},
{"dump", 0, NULL, 'd'},
{"output", 1, NULL, 'o'},
{NULL, 0, NULL, 0}
};
int option_idx = 1;
int option;
while (1) {
option = getopt_long(argc, argv,
"qhdo:", long_options, &option_idx);
if (option == -1) break;
fprintf(stderr, "option '%c' value '%s'\n", option, optarg);
switch (option) {
case 0: // unknown long option
if (!params->verbose) fprintf(stdout,
"unrecognized option: --%s\n",
long_options[option_idx].name);
break;
case 'q':
params->verbose = 0;
break;
case 'h':
case '?':
params->mode = usage;
break;
case 'd':
params->mode=dump;
break;
case 'o':
params->output_file = strdup(optarg);
break;
default:
if (!params->verbose) fprintf(stdout,
"unrecognized option: -%c\n", option);
break;
}
}
fprintf(stderr, "final option index %d out of %d\n", optind, argc);
return (optind);
}
static int
error_callback(void *error_callback_data, const char *buf, Jbig2Severity severity,
int32_t seg_idx)
{
char *type;
char segment[22];
switch (severity) {
case JBIG2_SEVERITY_DEBUG: type = "DEBUG"; break;;
case JBIG2_SEVERITY_INFO: type = "info"; break;;
case JBIG2_SEVERITY_WARNING: type = "WARNING"; break;;
case JBIG2_SEVERITY_FATAL: type = "FATAL ERROR"; break;;
default: type = "unknown message"; break;;
}
if (seg_idx == -1) segment[0] = '\0';
else snprintf(segment, sizeof(segment), "(segment 0x%02x)", seg_idx);
fprintf(stderr, "jbig2dec %s %s %s\n", type, buf, segment);
return 0;
}
static char *
make_output_filename(const char *input_filename, const char *extension)
{
char *output_filename;
const char *c, *e;
int len;
if (extension == NULL) {
fprintf(stderr, "make_output_filename called with no extension!\n");
exit (1);
}
if (input_filename == NULL)
c = "out";
else {
/* strip any leading path */
c = strrchr(input_filename, '/'); /* *nix */
if (c == NULL)
c = strrchr(input_filename, '\\'); /* win32/dos */
if (c != NULL)
c++; /* skip the path separator */
else
c = input_filename; /* no leading path */
}
/* make sure we haven't just stripped the last character */
if (*c == '\0')
c = "out";
/* strip the extension */
len = strlen(c);
e = strrchr(c, '.');
if (e != NULL)
len -= strlen(e);
/* allocate enough space for the base + ext */
output_filename = malloc(len + strlen(extension) + 1);
if (output_filename == NULL) {
fprintf(stderr, "couldn't allocate memory for output_filename\n");
exit (1);
}
strncpy(output_filename, c, len);
strncpy(output_filename + len, extension, strlen(extension));
*(output_filename + len + strlen(extension)) = '\0';
/* return the new string */
return (output_filename);
}
static int
write_page_image(jbig2dec_params_t *params, Jbig2Image *image)
{
if (!strcmp(params->output_file, "-"))
{
fprintf(stderr, "writing decoded page to stdout\n");
#ifdef HAVE_LIBPNG
jbig2_image_write_png(image, stdout);
#else
jbig2_image_write_pbm(image, stdout);
#endif
}
else
{
fprintf(stderr, "saving decoded page as '%s'\n", params->output_file);
#ifdef HAVE_LIBPNG
jbig2_image_write_png_file(image, params->output_file);
#else
jbig2_image_write_pbm_file(image, params->output_file);
#endif
}
return 0;
}
int
main (int argc, char **argv)
{
FILE *f = NULL, *f_page = NULL;
Jbig2Ctx *ctx;
uint8_t buf[4096];
jbig2dec_params_t params = {render,1,NULL};
int filearg;
filearg = parse_options(argc, argv, ¶ms);
switch (params.mode) {
case usage:
print_usage();
exit (0);
break;
case dump:
fprintf(stderr, "Sorry, segment dump not yet implemented\n");
break;
case render:
if ((argc - filearg) == 1)
// only one argument--open as a jbig2 file
{
char *fn = argv[filearg];
f = fopen(fn, "rb");
if (f == NULL)
{
fprintf(stderr, "error opening %s\n", fn);
return 1;
}
}
else if ((argc - filearg) == 2)
// two arguments open as separate global and page streams
{
char *fn = argv[filearg];
char *fn_page = argv[filearg+1];
f = fopen(fn, "rb");
if (f == NULL)
{
fprintf(stderr, "error opening %s\n", fn);
return 1;
}
f_page = fopen(fn_page, "rb");
if (f_page == NULL)
{
fprintf(stderr, "error opening %s\n", fn_page);
return 1;
}
}
else
// any other number of arguments
return print_usage();
ctx = jbig2_ctx_new(NULL, f_page != NULL ? JBIG2_OPTIONS_EMBEDDED : 0,
NULL,
error_callback, NULL);
// pull the whole file/global stream into memory
for (;;)
{
int n_bytes = fread(buf, 1, sizeof(buf), f);
if (n_bytes <= 0)
break;
jbig2_data_in(ctx, buf, n_bytes);
}
fclose(f);
// if there's a local page stream read that in its entirety
if (f_page != NULL)
{
Jbig2GlobalCtx *global_ctx = jbig2_make_global_ctx(ctx);
ctx = jbig2_ctx_new(NULL, JBIG2_OPTIONS_EMBEDDED, global_ctx,
error_callback, NULL);
for (;;)
{
int n_bytes = fread(buf, 1, sizeof(buf), f_page);
if (n_bytes <= 0)
break;
jbig2_data_in(ctx, buf, n_bytes);
}
fclose(f_page);
jbig2_global_ctx_free(global_ctx);
}
// retrieve and output the returned pages
{
Jbig2Image *image;
/* work around broken CVision embedded streams */
if (f_page != NULL)
jbig2_complete_page(ctx);
if (params.output_file == NULL)
{
#ifdef HAVE_LIBPNG
params.output_file = make_output_filename(argv[filearg], ".png");
#else
params.output_file = make_output_filename(argv[filearg], ".pbm");
#endif
}
/* retrieve and write out all the completed pages */
while ((image = jbig2_page_out(ctx)) != NULL) {
write_page_image(¶ms, image);
jbig2_release_page(ctx, image);
}
}
jbig2_ctx_free(ctx);
} /* end params.mode switch */
// fin
return 0;
}