rosapps/lib/libjpeg/djpeg.c

   1 /*
   2  * djpeg.c
   3  *
   4  * Copyright (C) 1991-1997, Thomas G. Lane.
   5  * This file is part of the Independent JPEG Group's software.
   6  * For conditions of distribution and use, see the accompanying README file.
   7  *
   8  * This file contains a command-line user interface for the JPEG decompressor.
   9  * It should work on any system with Unix- or MS-DOS-style command lines.
  10  *
  11  * Two different command line styles are permitted, depending on the
  12  * compile-time switch TWO_FILE_COMMANDLINE:
  13  *      djpeg [options]  inputfile outputfile
  14  *      djpeg [options]  [inputfile]
  15  * In the second style, output is always to standard output, which you'd
  16  * normally redirect to a file or pipe to some other program.  Input is
  17  * either from a named file or from standard input (typically redirected).
  18  * The second style is convenient on Unix but is unhelpful on systems that
  19  * don't support pipes.  Also, you MUST use the first style if your system
  20  * doesn't do binary I/O to stdin/stdout.
  21  * To simplify script writing, the "-outfile" switch is provided.  The syntax
  22  *      djpeg [options]  -outfile outputfile  inputfile
  23  * works regardless of which command line style is used.
  24  */
  25
  26 #include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
  27 #include "jversion.h"           /* for version message */
  28
  29 #include <ctype.h>              /* to declare isprint() */
  30
  31 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
  32 #ifdef __MWERKS__
  33 #include <SIOUX.h>              /* Metrowerks needs this */
  34 #include <console.h>            /* ... and this */
  35 #endif
  36 #ifdef THINK_C
  37 #include <console.h>            /* Think declares it here */
  38 #endif
  39 #endif
  40
  41
  42 /* Create the add-on message string table. */
  43
  44 #define JMESSAGE(code,string)   string ,
  45
  46 static const char * const cdjpeg_message_table[] = {
  47 #include "cderror.h"
  48   NULL
  49 };
  50
  51
  52 /*
  53  * This list defines the known output image formats
  54  * (not all of which need be supported by a given version).
  55  * You can change the default output format by defining DEFAULT_FMT;
  56  * indeed, you had better do so if you undefine PPM_SUPPORTED.
  57  */
  58
  59 typedef enum {
  60         FMT_BMP,                /* BMP format (Windows flavor) */
  61         FMT_GIF,                /* GIF format */
  62         FMT_OS2,                /* BMP format (OS/2 flavor) */
  63         FMT_PPM,                /* PPM/PGM (PBMPLUS formats) */
  64         FMT_RLE,                /* RLE format */
  65         FMT_TARGA,              /* Targa format */
  66         FMT_TIFF                /* TIFF format */
  67 } IMAGE_FORMATS;
  68
  69 #ifndef DEFAULT_FMT             /* so can override from CFLAGS in Makefile */
  70 #define DEFAULT_FMT     FMT_PPM
  71 #endif
  72
  73 static IMAGE_FORMATS requested_fmt;
  74
  75
  76 /*
  77  * Argument-parsing code.
  78  * The switch parser is designed to be useful with DOS-style command line
  79  * syntax, ie, intermixed switches and file names, where only the switches
  80  * to the left of a given file name affect processing of that file.
  81  * The main program in this file doesn't actually use this capability...
  82  */
  83
  84
  85 static const char * progname;   /* program name for error messages */
  86 static char * outfilename;      /* for -outfile switch */
  87
  88
  89 LOCAL(void)
  90 usage (void)
  91 /* complain about bad command line */
  92 {
  93   fprintf(stderr, "usage: %s [switches] ", progname);
  94 #ifdef TWO_FILE_COMMANDLINE
  95   fprintf(stderr, "inputfile outputfile\n");
  96 #else
  97   fprintf(stderr, "[inputfile]\n");
  98 #endif
  99
 100   fprintf(stderr, "Switches (names may be abbreviated):\n");
 101   fprintf(stderr, "  -colors N      Reduce image to no more than N colors\n");
 102   fprintf(stderr, "  -fast          Fast, low-quality processing\n");
 103   fprintf(stderr, "  -grayscale     Force grayscale output\n");
 104 #ifdef IDCT_SCALING_SUPPORTED
 105   fprintf(stderr, "  -scale M/N     Scale output image by fraction M/N, eg, 1/8\n");
 106 #endif
 107 #ifdef BMP_SUPPORTED
 108   fprintf(stderr, "  -bmp           Select BMP output format (Windows style)%s\n",
 109           (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
 110 #endif
 111 #ifdef GIF_SUPPORTED
 112   fprintf(stderr, "  -gif           Select GIF output format%s\n",
 113           (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
 114 #endif
 115 #ifdef BMP_SUPPORTED
 116   fprintf(stderr, "  -os2           Select BMP output format (OS/2 style)%s\n",
 117           (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
 118 #endif
 119 #ifdef PPM_SUPPORTED
 120   fprintf(stderr, "  -pnm           Select PBMPLUS (PPM/PGM) output format%s\n",
 121           (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
 122 #endif
 123 #ifdef RLE_SUPPORTED
 124   fprintf(stderr, "  -rle           Select Utah RLE output format%s\n",
 125           (DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
 126 #endif
 127 #ifdef TARGA_SUPPORTED
 128   fprintf(stderr, "  -targa         Select Targa output format%s\n",
 129           (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
 130 #endif
 131   fprintf(stderr, "Switches for advanced users:\n");
 132 #ifdef DCT_ISLOW_SUPPORTED
 133   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",
 134           (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
 135 #endif
 136 #ifdef DCT_IFAST_SUPPORTED
 137   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",
 138           (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
 139 #endif
 140 #ifdef DCT_FLOAT_SUPPORTED
 141   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",
 142           (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
 143 #endif
 144   fprintf(stderr, "  -dither fs     Use F-S dithering (default)\n");
 145   fprintf(stderr, "  -dither none   Don't use dithering in quantization\n");
 146   fprintf(stderr, "  -dither ordered  Use ordered dither (medium speed, quality)\n");
 147 #ifdef QUANT_2PASS_SUPPORTED
 148   fprintf(stderr, "  -map FILE      Map to colors used in named image file\n");
 149 #endif
 150   fprintf(stderr, "  -nosmooth      Don't use high-quality upsampling\n");
 151 #ifdef QUANT_1PASS_SUPPORTED
 152   fprintf(stderr, "  -onepass       Use 1-pass quantization (fast, low quality)\n");
 153 #endif
 154   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
 155   fprintf(stderr, "  -outfile name  Specify name for output file\n");
 156   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
 157   exit(EXIT_FAILURE);
 158 }
 159
 160
 161 LOCAL(int)
 162 parse_switches (j_decompress_ptr cinfo, int argc, char **argv,
 163                 int last_file_arg_seen, boolean for_real)
 164 /* Parse optional switches.
 165  * Returns argv[] index of first file-name argument (== argc if none).
 166  * Any file names with indexes <= last_file_arg_seen are ignored;
 167  * they have presumably been processed in a previous iteration.
 168  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
 169  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
 170  * processing.
 171  */
 172 {
 173   int argn;
 174   char * arg;
 175
 176   /* Set up default JPEG parameters. */
 177   requested_fmt = DEFAULT_FMT;  /* set default output file format */
 178   outfilename = NULL;
 179   cinfo->err->trace_level = 0;
 180
 181   /* Scan command line options, adjust parameters */
 182
 183   for (argn = 1; argn < argc; argn++) {
 184     arg = argv[argn];
 185     if (*arg != '-') {
 186       /* Not a switch, must be a file name argument */
 187       if (argn <= last_file_arg_seen) {
 188         outfilename = NULL;     /* -outfile applies to just one input file */
 189         continue;               /* ignore this name if previously processed */
 190       }
 191       break;                    /* else done parsing switches */
 192     }
 193     arg++;                      /* advance past switch marker character */
 194
 195     if (keymatch(arg, "bmp", 1)) {
 196       /* BMP output format. */
 197       requested_fmt = FMT_BMP;
 198
 199     } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
 200                keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
 201       /* Do color quantization. */
 202       int val;
 203
 204       if (++argn >= argc)       /* advance to next argument */
 205         usage();
 206       if (sscanf(argv[argn], "%d", &val) != 1)
 207         usage();
 208       cinfo->desired_number_of_colors = val;
 209       cinfo->quantize_colors = TRUE;
 210
 211     } else if (keymatch(arg, "dct", 2)) {
 212       /* Select IDCT algorithm. */
 213       if (++argn >= argc)       /* advance to next argument */
 214         usage();
 215       if (keymatch(argv[argn], "int", 1)) {
 216         cinfo->dct_method = JDCT_ISLOW;
 217       } else if (keymatch(argv[argn], "fast", 2)) {
 218         cinfo->dct_method = JDCT_IFAST;
 219       } else if (keymatch(argv[argn], "float", 2)) {
 220         cinfo->dct_method = JDCT_FLOAT;
 221       } else
 222         usage();
 223
 224     } else if (keymatch(arg, "dither", 2)) {
 225       /* Select dithering algorithm. */
 226       if (++argn >= argc)       /* advance to next argument */
 227         usage();
 228       if (keymatch(argv[argn], "fs", 2)) {
 229         cinfo->dither_mode = JDITHER_FS;
 230       } else if (keymatch(argv[argn], "none", 2)) {
 231         cinfo->dither_mode = JDITHER_NONE;
 232       } else if (keymatch(argv[argn], "ordered", 2)) {
 233         cinfo->dither_mode = JDITHER_ORDERED;
 234       } else
 235         usage();
 236
 237     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
 238       /* Enable debug printouts. */
 239       /* On first -d, print version identification */
 240       static boolean printed_version = FALSE;
 241
 242       if (! printed_version) {
 243         fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
 244                 JVERSION, JCOPYRIGHT);
 245         printed_version = TRUE;
 246       }
 247       cinfo->err->trace_level++;
 248
 249     } else if (keymatch(arg, "fast", 1)) {
 250       /* Select recommended processing options for quick-and-dirty output. */
 251       cinfo->two_pass_quantize = FALSE;
 252       cinfo->dither_mode = JDITHER_ORDERED;
 253       if (! cinfo->quantize_colors) /* don't override an earlier -colors */
 254         cinfo->desired_number_of_colors = 216;
 255       cinfo->dct_method = JDCT_FASTEST;
 256       cinfo->do_fancy_upsampling = FALSE;
 257
 258     } else if (keymatch(arg, "gif", 1)) {
 259       /* GIF output format. */
 260       requested_fmt = FMT_GIF;
 261
 262     } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
 263       /* Force monochrome output. */
 264       cinfo->out_color_space = JCS_GRAYSCALE;
 265
 266     } else if (keymatch(arg, "map", 3)) {
 267       /* Quantize to a color map taken from an input file. */
 268       if (++argn >= argc)       /* advance to next argument */
 269         usage();
 270       if (for_real) {           /* too expensive to do twice! */
 271 #ifdef QUANT_2PASS_SUPPORTED    /* otherwise can't quantize to supplied map */
 272         FILE * mapfile;
 273
 274         if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
 275           fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
 276           exit(EXIT_FAILURE);
 277         }
 278         read_color_map(cinfo, mapfile);
 279         fclose(mapfile);
 280         cinfo->quantize_colors = TRUE;
 281 #else
 282         ERREXIT(cinfo, JERR_NOT_COMPILED);
 283 #endif
 284       }
 285
 286     } else if (keymatch(arg, "maxmemory", 3)) {
 287       /* Maximum memory in Kb (or Mb with 'm'). */
 288       long lval;
 289       char ch = 'x';
 290
 291       if (++argn >= argc)       /* advance to next argument */
 292         usage();
 293       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 294         usage();
 295       if (ch == 'm' || ch == 'M')
 296         lval *= 1000L;
 297       cinfo->mem->max_memory_to_use = lval * 1000L;
 298
 299     } else if (keymatch(arg, "nosmooth", 3)) {
 300       /* Suppress fancy upsampling */
 301       cinfo->do_fancy_upsampling = FALSE;
 302
 303     } else if (keymatch(arg, "onepass", 3)) {
 304       /* Use fast one-pass quantization. */
 305       cinfo->two_pass_quantize = FALSE;
 306
 307     } else if (keymatch(arg, "os2", 3)) {
 308       /* BMP output format (OS/2 flavor). */
 309       requested_fmt = FMT_OS2;
 310
 311     } else if (keymatch(arg, "outfile", 4)) {
 312       /* Set output file name. */
 313       if (++argn >= argc)       /* advance to next argument */
 314         usage();
 315       outfilename = argv[argn]; /* save it away for later use */
 316
 317     } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
 318       /* PPM/PGM output format. */
 319       requested_fmt = FMT_PPM;
 320
 321     } else if (keymatch(arg, "rle", 1)) {
 322       /* RLE output format. */
 323       requested_fmt = FMT_RLE;
 324
 325     } else if (keymatch(arg, "scale", 1)) {
 326       /* Scale the output image by a fraction M/N. */
 327       if (++argn >= argc)       /* advance to next argument */
 328         usage();
 329       if (sscanf(argv[argn], "%d/%d",
 330                  &cinfo->scale_num, &cinfo->scale_denom) != 2)
 331         usage();
 332
 333     } else if (keymatch(arg, "targa", 1)) {
 334       /* Targa output format. */
 335       requested_fmt = FMT_TARGA;
 336
 337     } else {
 338       usage();                  /* bogus switch */
 339     }
 340   }
 341
 342   return argn;                  /* return index of next arg (file name) */
 343 }
 344
 345
 346 /*
 347  * Marker processor for COM and interesting APPn markers.
 348  * This replaces the library's built-in processor, which just skips the marker.
 349  * We want to print out the marker as text, to the extent possible.
 350  * Note this code relies on a non-suspending data source.
 351  */
 352
 353 LOCAL(unsigned int)
 354 jpeg_getc (j_decompress_ptr cinfo)
 355 /* Read next byte */
 356 {
 357   struct jpeg_source_mgr * datasrc = cinfo->src;
 358
 359   if (datasrc->bytes_in_buffer == 0) {
 360     if (! (*datasrc->fill_input_buffer) (cinfo))
 361       ERREXIT(cinfo, JERR_CANT_SUSPEND);
 362   }
 363   datasrc->bytes_in_buffer--;
 364   return GETJOCTET(*datasrc->next_input_byte++);
 365 }
 366
 367
 368 METHODDEF(boolean)
 369 print_text_marker (j_decompress_ptr cinfo)
 370 {
 371   boolean traceit = (cinfo->err->trace_level >= 1);
 372   INT32 length;
 373   unsigned int ch;
 374   unsigned int lastch = 0;
 375
 376   length = jpeg_getc(cinfo) << 8;
 377   length += jpeg_getc(cinfo);
 378   length -= 2;                  /* discount the length word itself */
 379
 380   if (traceit) {
 381     if (cinfo->unread_marker == JPEG_COM)
 382       fprintf(stderr, "Comment, length %ld:\n", (long) length);
 383     else                        /* assume it is an APPn otherwise */
 384       fprintf(stderr, "APP%d, length %ld:\n",
 385               cinfo->unread_marker - JPEG_APP0, (long) length);
 386   }
 387
 388   while (--length >= 0) {
 389     ch = jpeg_getc(cinfo);
 390     if (traceit) {
 391       /* Emit the character in a readable form.
 392        * Nonprintables are converted to \nnn form,
 393        * while \ is converted to \\.
 394        * Newlines in CR, CR/LF, or LF form will be printed as one newline.
 395        */
 396       if (ch == '\r') {
 397         fprintf(stderr, "\n");
 398       } else if (ch == '\n') {
 399         if (lastch != '\r')
 400           fprintf(stderr, "\n");
 401       } else if (ch == '\\') {
 402         fprintf(stderr, "\\\\");
 403       } else if (isprint(ch)) {
 404         putc(ch, stderr);
 405       } else {
 406         fprintf(stderr, "\\%03o", ch);
 407       }
 408       lastch = ch;
 409     }
 410   }
 411
 412   if (traceit)
 413     fprintf(stderr, "\n");
 414
 415   return TRUE;
 416 }
 417
 418
 419 /*
 420  * The main program.
 421  */
 422
 423 int
 424 main (int argc, char **argv)
 425 {
 426   struct jpeg_decompress_struct cinfo;
 427   struct jpeg_error_mgr jerr;
 428 #ifdef PROGRESS_REPORT
 429   struct cdjpeg_progress_mgr progress;
 430 #endif
 431   int file_index;
 432   djpeg_dest_ptr dest_mgr = NULL;
 433   FILE * input_file;
 434   FILE * output_file;
 435   JDIMENSION num_scanlines;
 436
 437   /* On Mac, fetch a command line. */
 438 #ifdef USE_CCOMMAND
 439   argc = ccommand(&argv);
 440 #endif
 441
 442   progname = argv[0];
 443   if (progname == NULL || progname[0] == 0)
 444     progname = "djpeg";         /* in case C library doesn't provide it */
 445
 446   /* Initialize the JPEG decompression object with default error handling. */
 447   cinfo.err = jpeg_std_error(&jerr);
 448   jpeg_create_decompress(&cinfo);
 449   /* Add some application-specific error messages (from cderror.h) */
 450   jerr.addon_message_table = cdjpeg_message_table;
 451   jerr.first_addon_message = JMSG_FIRSTADDONCODE;
 452   jerr.last_addon_message = JMSG_LASTADDONCODE;
 453
 454   /* Insert custom marker processor for COM and APP12.
 455    * APP12 is used by some digital camera makers for textual info,
 456    * so we provide the ability to display it as text.
 457    * If you like, additional APPn marker types can be selected for display,
 458    * but don't try to override APP0 or APP14 this way (see libjpeg.doc).
 459    */
 460   jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
 461   jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
 462
 463   /* Now safe to enable signal catcher. */
 464 #ifdef NEED_SIGNAL_CATCHER
 465   enable_signal_catcher((j_common_ptr) &cinfo);
 466 #endif
 467
 468   /* Scan command line to find file names. */
 469   /* It is convenient to use just one switch-parsing routine, but the switch
 470    * values read here are ignored; we will rescan the switches after opening
 471    * the input file.
 472    * (Exception: tracing level set here controls verbosity for COM markers
 473    * found during jpeg_read_header...)
 474    */
 475
 476   file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
 477
 478 #ifdef TWO_FILE_COMMANDLINE
 479   /* Must have either -outfile switch or explicit output file name */
 480   if (outfilename == NULL) {
 481     if (file_index != argc-2) {
 482       fprintf(stderr, "%s: must name one input and one output file\n",
 483               progname);
 484       usage();
 485     }
 486     outfilename = argv[file_index+1];
 487   } else {
 488     if (file_index != argc-1) {
 489       fprintf(stderr, "%s: must name one input and one output file\n",
 490               progname);
 491       usage();
 492     }
 493   }
 494 #else
 495   /* Unix style: expect zero or one file name */
 496   if (file_index < argc-1) {
 497     fprintf(stderr, "%s: only one input file\n", progname);
 498     usage();
 499   }
 500 #endif /* TWO_FILE_COMMANDLINE */
 501
 502   /* Open the input file. */
 503   if (file_index < argc) {
 504     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
 505       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
 506       exit(EXIT_FAILURE);
 507     }
 508   } else {
 509     /* default input file is stdin */
 510     input_file = read_stdin();
 511   }
 512
 513   /* Open the output file. */
 514   if (outfilename != NULL) {
 515     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
 516       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
 517       exit(EXIT_FAILURE);
 518     }
 519   } else {
 520     /* default output file is stdout */
 521     output_file = write_stdout();
 522   }
 523
 524 #ifdef PROGRESS_REPORT
 525   start_progress_monitor((j_common_ptr) &cinfo, &progress);
 526 #endif
 527
 528   /* Specify data source for decompression */
 529   jpeg_stdio_src(&cinfo, input_file);
 530
 531   /* Read file header, set default decompression parameters */
 532   (void) jpeg_read_header(&cinfo, TRUE);
 533
 534   /* Adjust default decompression parameters by re-parsing the options */
 535   file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
 536
 537   /* Initialize the output module now to let it override any crucial
 538    * option settings (for instance, GIF wants to force color quantization).
 539    */
 540   switch (requested_fmt) {
 541 #ifdef BMP_SUPPORTED
 542   case FMT_BMP:
 543     dest_mgr = jinit_write_bmp(&cinfo, FALSE);
 544     break;
 545   case FMT_OS2:
 546     dest_mgr = jinit_write_bmp(&cinfo, TRUE);
 547     break;
 548 #endif
 549 #ifdef GIF_SUPPORTED
 550   case FMT_GIF:
 551     dest_mgr = jinit_write_gif(&cinfo);
 552     break;
 553 #endif
 554 #ifdef PPM_SUPPORTED
 555   case FMT_PPM:
 556     dest_mgr = jinit_write_ppm(&cinfo);
 557     break;
 558 #endif
 559 #ifdef RLE_SUPPORTED
 560   case FMT_RLE:
 561     dest_mgr = jinit_write_rle(&cinfo);
 562     break;
 563 #endif
 564 #ifdef TARGA_SUPPORTED
 565   case FMT_TARGA:
 566     dest_mgr = jinit_write_targa(&cinfo);
 567     break;
 568 #endif
 569   default:
 570     ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
 571     break;
 572   }
 573   dest_mgr->output_file = output_file;
 574
 575   /* Start decompressor */
 576   (void) jpeg_start_decompress(&cinfo);
 577
 578   /* Write output file header */
 579   (*dest_mgr->start_output) (&cinfo, dest_mgr);
 580
 581   /* Process data */
 582   while (cinfo.output_scanline < cinfo.output_height) {
 583     num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
 584                                         dest_mgr->buffer_height);
 585     (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
 586   }
 587
 588 #ifdef PROGRESS_REPORT
 589   /* Hack: count final pass as done in case finish_output does an extra pass.
 590    * The library won't have updated completed_passes.
 591    */
 592   progress.pub.completed_passes = progress.pub.total_passes;
 593 #endif
 594
 595   /* Finish decompression and release memory.
 596    * I must do it in this order because output module has allocated memory
 597    * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
 598    */
 599   (*dest_mgr->finish_output) (&cinfo, dest_mgr);
 600   (void) jpeg_finish_decompress(&cinfo);
 601   jpeg_destroy_decompress(&cinfo);
 602
 603   /* Close files, if we opened them */
 604   if (input_file != stdin)
 605     fclose(input_file);
 606   if (output_file != stdout)
 607     fclose(output_file);
 608
 609 #ifdef PROGRESS_REPORT
 610   end_progress_monitor((j_common_ptr) &cinfo);
 611 #endif
 612
 613   /* All done. */
 614   exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
 615   return 0;                     /* suppress no-return-value warnings */
 616 }