workbench/libs/jpeg/djpeg.c

   1 /*
   2  * djpeg.c
   3  *
   4  * Copyright (C) 1991-1997, Thomas G. Lane.
   5  * Modified 2009-2013 by Guido Vollbeding.
   6  * This file is part of the Independent JPEG Group's software.
   7  * For conditions of distribution and use, see the accompanying README file.
   8  *
   9  * This file contains a command-line user interface for the JPEG decompressor.
  10  * It should work on any system with Unix- or MS-DOS-style command lines.
  11  *
  12  * Two different command line styles are permitted, depending on the
  13  * compile-time switch TWO_FILE_COMMANDLINE:
  14  *      djpeg [options]  inputfile outputfile
  15  *      djpeg [options]  [inputfile]
  16  * In the second style, output is always to standard output, which you'd
  17  * normally redirect to a file or pipe to some other program.  Input is
  18  * either from a named file or from standard input (typically redirected).
  19  * The second style is convenient on Unix but is unhelpful on systems that
  20  * don't support pipes.  Also, you MUST use the first style if your system
  21  * doesn't do binary I/O to stdin/stdout.
  22  * To simplify script writing, the "-outfile" switch is provided.  The syntax
  23  *      djpeg [options]  -outfile outputfile  inputfile
  24  * works regardless of which command line style is used.
  25  */
  26
  27 #include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
  28 #include "jversion.h"           /* for version message */
  29
  30 #include <ctype.h>              /* to declare isprint() */
  31
  32 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
  33 #ifdef __MWERKS__
  34 #include <SIOUX.h>              /* Metrowerks needs this */
  35 #include <console.h>            /* ... and this */
  36 #endif
  37 #ifdef THINK_C
  38 #include <console.h>            /* Think declares it here */
  39 #endif
  40 #endif
  41
  42
  43 /* Create the add-on message string table. */
  44
  45 #define JMESSAGE(code,string)   string ,
  46
  47 static const char * const cdjpeg_message_table[] = {
  48 #include "cderror.h"
  49   NULL
  50 };
  51
  52
  53 /*
  54  * This list defines the known output image formats
  55  * (not all of which need be supported by a given version).
  56  * You can change the default output format by defining DEFAULT_FMT;
  57  * indeed, you had better do so if you undefine PPM_SUPPORTED.
  58  */
  59
  60 typedef enum {
  61         FMT_BMP,                /* BMP format (Windows flavor) */
  62         FMT_GIF,                /* GIF format */
  63         FMT_OS2,                /* BMP format (OS/2 flavor) */
  64         FMT_PPM,                /* PPM/PGM (PBMPLUS formats) */
  65         FMT_RLE,                /* RLE format */
  66         FMT_TARGA,              /* Targa format */
  67         FMT_TIFF                /* TIFF format */
  68 } IMAGE_FORMATS;
  69
  70 #ifndef DEFAULT_FMT             /* so can override from CFLAGS in Makefile */
  71 #define DEFAULT_FMT     FMT_PPM
  72 #endif
  73
  74 static IMAGE_FORMATS requested_fmt;
  75
  76
  77 /*
  78  * Argument-parsing code.
  79  * The switch parser is designed to be useful with DOS-style command line
  80  * syntax, ie, intermixed switches and file names, where only the switches
  81  * to the left of a given file name affect processing of that file.
  82  * The main program in this file doesn't actually use this capability...
  83  */
  84
  85
  86 static const char * progname;   /* program name for error messages */
  87 static char * outfilename;      /* for -outfile switch */
  88
  89
  90 LOCAL(void)
  91 usage (void)
  92 /* complain about bad command line */
  93 {
  94   fprintf(stderr, "usage: %s [switches] ", progname);
  95 #ifdef TWO_FILE_COMMANDLINE
  96   fprintf(stderr, "inputfile outputfile\n");
  97 #else
  98   fprintf(stderr, "[inputfile]\n");
  99 #endif
 100
 101   fprintf(stderr, "Switches (names may be abbreviated):\n");
 102   fprintf(stderr, "  -colors N      Reduce image to no more than N colors\n");
 103   fprintf(stderr, "  -fast          Fast, low-quality processing\n");
 104   fprintf(stderr, "  -grayscale     Force grayscale output\n");
 105 #ifdef IDCT_SCALING_SUPPORTED
 106   fprintf(stderr, "  -scale M/N     Scale output image by fraction M/N, eg, 1/8\n");
 107 #endif
 108 #ifdef BMP_SUPPORTED
 109   fprintf(stderr, "  -bmp           Select BMP output format (Windows style)%s\n",
 110           (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
 111 #endif
 112 #ifdef GIF_SUPPORTED
 113   fprintf(stderr, "  -gif           Select GIF output format%s\n",
 114           (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
 115 #endif
 116 #ifdef BMP_SUPPORTED
 117   fprintf(stderr, "  -os2           Select BMP output format (OS/2 style)%s\n",
 118           (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
 119 #endif
 120 #ifdef PPM_SUPPORTED
 121   fprintf(stderr, "  -pnm           Select PBMPLUS (PPM/PGM) output format%s\n",
 122           (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
 123 #endif
 124 #ifdef RLE_SUPPORTED
 125   fprintf(stderr, "  -rle           Select Utah RLE output format%s\n",
 126           (DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
 127 #endif
 128 #ifdef TARGA_SUPPORTED
 129   fprintf(stderr, "  -targa         Select Targa output format%s\n",
 130           (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
 131 #endif
 132   fprintf(stderr, "Switches for advanced users:\n");
 133 #ifdef DCT_ISLOW_SUPPORTED
 134   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",
 135           (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
 136 #endif
 137 #ifdef DCT_IFAST_SUPPORTED
 138   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",
 139           (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
 140 #endif
 141 #ifdef DCT_FLOAT_SUPPORTED
 142   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",
 143           (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
 144 #endif
 145   fprintf(stderr, "  -dither fs     Use F-S dithering (default)\n");
 146   fprintf(stderr, "  -dither none   Don't use dithering in quantization\n");
 147   fprintf(stderr, "  -dither ordered  Use ordered dither (medium speed, quality)\n");
 148 #ifdef QUANT_2PASS_SUPPORTED
 149   fprintf(stderr, "  -map FILE      Map to colors used in named image file\n");
 150 #endif
 151   fprintf(stderr, "  -nosmooth      Don't use high-quality upsampling\n");
 152 #ifdef QUANT_1PASS_SUPPORTED
 153   fprintf(stderr, "  -onepass       Use 1-pass quantization (fast, low quality)\n");
 154 #endif
 155   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
 156   fprintf(stderr, "  -outfile name  Specify name for output file\n");
 157   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
 158   exit(EXIT_FAILURE);
 159 }
 160
 161
 162 LOCAL(int)
 163 parse_switches (j_decompress_ptr cinfo, int argc, char **argv,
 164                 int last_file_arg_seen, boolean for_real)
 165 /* Parse optional switches.
 166  * Returns argv[] index of first file-name argument (== argc if none).
 167  * Any file names with indexes <= last_file_arg_seen are ignored;
 168  * they have presumably been processed in a previous iteration.
 169  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
 170  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
 171  * processing.
 172  */
 173 {
 174   int argn;
 175   char * arg;
 176
 177   /* Set up default JPEG parameters. */
 178   requested_fmt = DEFAULT_FMT;  /* set default output file format */
 179   outfilename = NULL;
 180   cinfo->err->trace_level = 0;
 181
 182   /* Scan command line options, adjust parameters */
 183
 184   for (argn = 1; argn < argc; argn++) {
 185     arg = argv[argn];
 186     if (*arg != '-') {
 187       /* Not a switch, must be a file name argument */
 188       if (argn <= last_file_arg_seen) {
 189         outfilename = NULL;     /* -outfile applies to just one input file */
 190         continue;               /* ignore this name if previously processed */
 191       }
 192       break;                    /* else done parsing switches */
 193     }
 194     arg++;                      /* advance past switch marker character */
 195
 196     if (keymatch(arg, "bmp", 1)) {
 197       /* BMP output format. */
 198       requested_fmt = FMT_BMP;
 199
 200     } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
 201                keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
 202       /* Do color quantization. */
 203       int val;
 204
 205       if (++argn >= argc)       /* advance to next argument */
 206         usage();
 207       if (sscanf(argv[argn], "%d", &val) != 1)
 208         usage();
 209       cinfo->desired_number_of_colors = val;
 210       cinfo->quantize_colors = TRUE;
 211
 212     } else if (keymatch(arg, "dct", 2)) {
 213       /* Select IDCT algorithm. */
 214       if (++argn >= argc)       /* advance to next argument */
 215         usage();
 216       if (keymatch(argv[argn], "int", 1)) {
 217         cinfo->dct_method = JDCT_ISLOW;
 218       } else if (keymatch(argv[argn], "fast", 2)) {
 219         cinfo->dct_method = JDCT_IFAST;
 220       } else if (keymatch(argv[argn], "float", 2)) {
 221         cinfo->dct_method = JDCT_FLOAT;
 222       } else
 223         usage();
 224
 225     } else if (keymatch(arg, "dither", 2)) {
 226       /* Select dithering algorithm. */
 227       if (++argn >= argc)       /* advance to next argument */
 228         usage();
 229       if (keymatch(argv[argn], "fs", 2)) {
 230         cinfo->dither_mode = JDITHER_FS;
 231       } else if (keymatch(argv[argn], "none", 2)) {
 232         cinfo->dither_mode = JDITHER_NONE;
 233       } else if (keymatch(argv[argn], "ordered", 2)) {
 234         cinfo->dither_mode = JDITHER_ORDERED;
 235       } else
 236         usage();
 237
 238     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
 239       /* Enable debug printouts. */
 240       /* On first -d, print version identification */
 241       static boolean printed_version = FALSE;
 242
 243       if (! printed_version) {
 244         fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
 245                 JVERSION, JCOPYRIGHT);
 246         printed_version = TRUE;
 247       }
 248       cinfo->err->trace_level++;
 249
 250     } else if (keymatch(arg, "fast", 1)) {
 251       /* Select recommended processing options for quick-and-dirty output. */
 252       cinfo->two_pass_quantize = FALSE;
 253       cinfo->dither_mode = JDITHER_ORDERED;
 254       if (! cinfo->quantize_colors) /* don't override an earlier -colors */
 255         cinfo->desired_number_of_colors = 216;
 256       cinfo->dct_method = JDCT_FASTEST;
 257       cinfo->do_fancy_upsampling = FALSE;
 258
 259     } else if (keymatch(arg, "gif", 1)) {
 260       /* GIF output format. */
 261       requested_fmt = FMT_GIF;
 262
 263     } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
 264       /* Force monochrome output. */
 265       cinfo->out_color_space = JCS_GRAYSCALE;
 266
 267     } else if (keymatch(arg, "map", 3)) {
 268       /* Quantize to a color map taken from an input file. */
 269       if (++argn >= argc)       /* advance to next argument */
 270         usage();
 271       if (for_real) {           /* too expensive to do twice! */
 272 #ifdef QUANT_2PASS_SUPPORTED    /* otherwise can't quantize to supplied map */
 273         FILE * mapfile;
 274
 275         if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
 276           fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
 277           exit(EXIT_FAILURE);
 278         }
 279         read_color_map(cinfo, mapfile);
 280         fclose(mapfile);
 281         cinfo->quantize_colors = TRUE;
 282 #else
 283         ERREXIT(cinfo, JERR_NOT_COMPILED);
 284 #endif
 285       }
 286
 287     } else if (keymatch(arg, "maxmemory", 3)) {
 288       /* Maximum memory in Kb (or Mb with 'm'). */
 289       long lval;
 290       char ch = 'x';
 291
 292       if (++argn >= argc)       /* advance to next argument */
 293         usage();
 294       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 295         usage();
 296       if (ch == 'm' || ch == 'M')
 297         lval *= 1000L;
 298       cinfo->mem->max_memory_to_use = lval * 1000L;
 299
 300     } else if (keymatch(arg, "nosmooth", 3)) {
 301       /* Suppress fancy upsampling. */
 302       cinfo->do_fancy_upsampling = FALSE;
 303
 304     } else if (keymatch(arg, "onepass", 3)) {
 305       /* Use fast one-pass quantization. */
 306       cinfo->two_pass_quantize = FALSE;
 307
 308     } else if (keymatch(arg, "os2", 3)) {
 309       /* BMP output format (OS/2 flavor). */
 310       requested_fmt = FMT_OS2;
 311
 312     } else if (keymatch(arg, "outfile", 4)) {
 313       /* Set output file name. */
 314       if (++argn >= argc)       /* advance to next argument */
 315         usage();
 316       outfilename = argv[argn]; /* save it away for later use */
 317
 318     } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
 319       /* PPM/PGM output format. */
 320       requested_fmt = FMT_PPM;
 321
 322     } else if (keymatch(arg, "rle", 1)) {
 323       /* RLE output format. */
 324       requested_fmt = FMT_RLE;
 325
 326     } else if (keymatch(arg, "scale", 1)) {
 327       /* Scale the output image by a fraction M/N. */
 328       if (++argn >= argc)       /* advance to next argument */
 329         usage();
 330       if (sscanf(argv[argn], "%u/%u",
 331                  &cinfo->scale_num, &cinfo->scale_denom) < 1)
 332         usage();
 333
 334     } else if (keymatch(arg, "targa", 1)) {
 335       /* Targa output format. */
 336       requested_fmt = FMT_TARGA;
 337
 338     } else {
 339       usage();                  /* bogus switch */
 340     }
 341   }
 342
 343   return argn;                  /* return index of next arg (file name) */
 344 }
 345
 346
 347 /*
 348  * Marker processor for COM and interesting APPn markers.
 349  * This replaces the library's built-in processor, which just skips the marker.
 350  * We want to print out the marker as text, to the extent possible.
 351  * Note this code relies on a non-suspending data source.
 352  */
 353
 354 LOCAL(unsigned int)
 355 jpeg_getc (j_decompress_ptr cinfo)
 356 /* Read next byte */
 357 {
 358   struct jpeg_source_mgr * datasrc = cinfo->src;
 359
 360   if (datasrc->bytes_in_buffer == 0) {
 361     if (! (*datasrc->fill_input_buffer) (cinfo))
 362       ERREXIT(cinfo, JERR_CANT_SUSPEND);
 363   }
 364   datasrc->bytes_in_buffer--;
 365   return GETJOCTET(*datasrc->next_input_byte++);
 366 }
 367
 368
 369 METHODDEF(boolean)
 370 print_text_marker (j_decompress_ptr cinfo)
 371 {
 372   boolean traceit = (cinfo->err->trace_level >= 1);
 373   INT32 length;
 374   unsigned int ch;
 375   unsigned int lastch = 0;
 376
 377   length = jpeg_getc(cinfo) << 8;
 378   length += jpeg_getc(cinfo);
 379   length -= 2;                  /* discount the length word itself */
 380
 381   if (traceit) {
 382     if (cinfo->unread_marker == JPEG_COM)
 383       fprintf(stderr, "Comment, length %ld:\n", (long) length);
 384     else                        /* assume it is an APPn otherwise */
 385       fprintf(stderr, "APP%d, length %ld:\n",
 386               cinfo->unread_marker - JPEG_APP0, (long) length);
 387   }
 388
 389   while (--length >= 0) {
 390     ch = jpeg_getc(cinfo);
 391     if (traceit) {
 392       /* Emit the character in a readable form.
 393        * Nonprintables are converted to \nnn form,
 394        * while \ is converted to \\.
 395        * Newlines in CR, CR/LF, or LF form will be printed as one newline.
 396        */
 397       if (ch == '\r') {
 398         fprintf(stderr, "\n");
 399       } else if (ch == '\n') {
 400         if (lastch != '\r')
 401           fprintf(stderr, "\n");
 402       } else if (ch == '\\') {
 403         fprintf(stderr, "\\\\");
 404       } else if (isprint(ch)) {
 405         putc(ch, stderr);
 406       } else {
 407         fprintf(stderr, "\\%03o", ch);
 408       }
 409       lastch = ch;
 410     }
 411   }
 412
 413   if (traceit)
 414     fprintf(stderr, "\n");
 415
 416   return TRUE;
 417 }
 418
 419
 420 /*
 421  * The main program.
 422  */
 423
 424 int
 425 main (int argc, char **argv)
 426 {
 427   struct jpeg_decompress_struct cinfo;
 428   struct jpeg_error_mgr jerr;
 429 #ifdef PROGRESS_REPORT
 430   struct cdjpeg_progress_mgr progress;
 431 #endif
 432   int file_index;
 433   djpeg_dest_ptr dest_mgr = NULL;
 434   FILE * input_file;
 435   FILE * output_file;
 436   JDIMENSION num_scanlines;
 437
 438   /* On Mac, fetch a command line. */
 439 #ifdef USE_CCOMMAND
 440   argc = ccommand(&argv);
 441 #endif
 442
 443   progname = argv[0];
 444   if (progname == NULL || progname[0] == 0)
 445     progname = "djpeg";         /* in case C library doesn't provide it */
 446
 447   /* Initialize the JPEG decompression object with default error handling. */
 448   cinfo.err = jpeg_std_error(&jerr);
 449   jpeg_create_decompress(&cinfo);
 450   /* Add some application-specific error messages (from cderror.h) */
 451   jerr.addon_message_table = cdjpeg_message_table;
 452   jerr.first_addon_message = JMSG_FIRSTADDONCODE;
 453   jerr.last_addon_message = JMSG_LASTADDONCODE;
 454
 455   /* Insert custom marker processor for COM and APP12.
 456    * APP12 is used by some digital camera makers for textual info,
 457    * so we provide the ability to display it as text.
 458    * If you like, additional APPn marker types can be selected for display,
 459    * but don't try to override APP0 or APP14 this way (see libjpeg.doc).
 460    */
 461   jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
 462   jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
 463
 464   /* Now safe to enable signal catcher. */
 465 #ifdef NEED_SIGNAL_CATCHER
 466   enable_signal_catcher((j_common_ptr) &cinfo);
 467 #endif
 468
 469   /* Scan command line to find file names. */
 470   /* It is convenient to use just one switch-parsing routine, but the switch
 471    * values read here are ignored; we will rescan the switches after opening
 472    * the input file.
 473    * (Exception: tracing level set here controls verbosity for COM markers
 474    * found during jpeg_read_header...)
 475    */
 476
 477   file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
 478
 479 #ifdef TWO_FILE_COMMANDLINE
 480   /* Must have either -outfile switch or explicit output file name */
 481   if (outfilename == NULL) {
 482     if (file_index != argc-2) {
 483       fprintf(stderr, "%s: must name one input and one output file\n",
 484               progname);
 485       usage();
 486     }
 487     outfilename = argv[file_index+1];
 488   } else {
 489     if (file_index != argc-1) {
 490       fprintf(stderr, "%s: must name one input and one output file\n",
 491               progname);
 492       usage();
 493     }
 494   }
 495 #else
 496   /* Unix style: expect zero or one file name */
 497   if (file_index < argc-1) {
 498     fprintf(stderr, "%s: only one input file\n", progname);
 499     usage();
 500   }
 501 #endif /* TWO_FILE_COMMANDLINE */
 502
 503   /* Open the input file. */
 504   if (file_index < argc) {
 505     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
 506       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
 507       exit(EXIT_FAILURE);
 508     }
 509   } else {
 510     /* default input file is stdin */
 511     input_file = read_stdin();
 512   }
 513
 514   /* Open the output file. */
 515   if (outfilename != NULL) {
 516     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
 517       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
 518       exit(EXIT_FAILURE);
 519     }
 520   } else {
 521     /* default output file is stdout */
 522     output_file = write_stdout();
 523   }
 524
 525 #ifdef PROGRESS_REPORT
 526   start_progress_monitor((j_common_ptr) &cinfo, &progress);
 527 #endif
 528
 529   /* Specify data source for decompression */
 530   jpeg_stdio_src(&cinfo, input_file);
 531
 532   /* Read file header, set default decompression parameters */
 533   (void) jpeg_read_header(&cinfo, TRUE);
 534
 535   /* Adjust default decompression parameters by re-parsing the options */
 536   file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
 537
 538   /* Initialize the output module now to let it override any crucial
 539    * option settings (for instance, GIF wants to force color quantization).
 540    */
 541   switch (requested_fmt) {
 542 #ifdef BMP_SUPPORTED
 543   case FMT_BMP:
 544     dest_mgr = jinit_write_bmp(&cinfo, FALSE);
 545     break;
 546   case FMT_OS2:
 547     dest_mgr = jinit_write_bmp(&cinfo, TRUE);
 548     break;
 549 #endif
 550 #ifdef GIF_SUPPORTED
 551   case FMT_GIF:
 552     dest_mgr = jinit_write_gif(&cinfo);
 553     break;
 554 #endif
 555 #ifdef PPM_SUPPORTED
 556   case FMT_PPM:
 557     dest_mgr = jinit_write_ppm(&cinfo);
 558     break;
 559 #endif
 560 #ifdef RLE_SUPPORTED
 561   case FMT_RLE:
 562     dest_mgr = jinit_write_rle(&cinfo);
 563     break;
 564 #endif
 565 #ifdef TARGA_SUPPORTED
 566   case FMT_TARGA:
 567     dest_mgr = jinit_write_targa(&cinfo);
 568     break;
 569 #endif
 570   default:
 571     ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
 572     break;
 573   }
 574   dest_mgr->output_file = output_file;
 575
 576   /* Start decompressor */
 577   (void) jpeg_start_decompress(&cinfo);
 578
 579   /* Write output file header */
 580   (*dest_mgr->start_output) (&cinfo, dest_mgr);
 581
 582   /* Process data */
 583   while (cinfo.output_scanline < cinfo.output_height) {
 584     num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
 585                                         dest_mgr->buffer_height);
 586     (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
 587   }
 588
 589 #ifdef PROGRESS_REPORT
 590   /* Hack: count final pass as done in case finish_output does an extra pass.
 591    * The library won't have updated completed_passes.
 592    */
 593   progress.pub.completed_passes = progress.pub.total_passes;
 594 #endif
 595
 596   /* Finish decompression and release memory.
 597    * I must do it in this order because output module has allocated memory
 598    * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
 599    */
 600   (*dest_mgr->finish_output) (&cinfo, dest_mgr);
 601   (void) jpeg_finish_decompress(&cinfo);
 602   jpeg_destroy_decompress(&cinfo);
 603
 604   /* Close files, if we opened them */
 605   if (input_file != stdin)
 606     fclose(input_file);
 607   if (output_file != stdout)
 608     fclose(output_file);
 609
 610 #ifdef PROGRESS_REPORT
 611   end_progress_monitor((j_common_ptr) &cinfo);
 612 #endif
 613
 614   /* All done. */
 615   exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
 616   return 0;                     /* suppress no-return-value warnings */
 617 }