dll/3rdparty/libjpeg/cjpeg.c

   1 /*
   2  * cjpeg.c
   3  *
   4  * Copyright (C) 1991-1998, Thomas G. Lane.
   5  * Modified 2003-2008 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 compressor.
  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  *      cjpeg [options]  inputfile outputfile
  15  *      cjpeg [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  *      cjpeg [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 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
  31 #ifdef __MWERKS__
  32 #include <SIOUX.h>              /* Metrowerks needs this */
  33 #include <console.h>            /* ... and this */
  34 #endif
  35 #ifdef THINK_C
  36 #include <console.h>            /* Think declares it here */
  37 #endif
  38 #endif
  39
  40
  41 /* Create the add-on message string table. */
  42
  43 #define JMESSAGE(code,string)   string ,
  44
  45 static const char * const cdjpeg_message_table[] = {
  46 #include "cderror.h"
  47   NULL
  48 };
  49
  50
  51 /*
  52  * This routine determines what format the input file is,
  53  * and selects the appropriate input-reading module.
  54  *
  55  * To determine which family of input formats the file belongs to,
  56  * we may look only at the first byte of the file, since C does not
  57  * guarantee that more than one character can be pushed back with ungetc.
  58  * Looking at additional bytes would require one of these approaches:
  59  *     1) assume we can fseek() the input file (fails for piped input);
  60  *     2) assume we can push back more than one character (works in
  61  *        some C implementations, but unportable);
  62  *     3) provide our own buffering (breaks input readers that want to use
  63  *        stdio directly, such as the RLE library);
  64  * or  4) don't put back the data, and modify the input_init methods to assume
  65  *        they start reading after the start of file (also breaks RLE library).
  66  * #1 is attractive for MS-DOS but is untenable on Unix.
  67  *
  68  * The most portable solution for file types that can't be identified by their
  69  * first byte is to make the user tell us what they are.  This is also the
  70  * only approach for "raw" file types that contain only arbitrary values.
  71  * We presently apply this method for Targa files.  Most of the time Targa
  72  * files start with 0x00, so we recognize that case.  Potentially, however,
  73  * a Targa file could start with any byte value (byte 0 is the length of the
  74  * seldom-used ID field), so we provide a switch to force Targa input mode.
  75  */
  76
  77 static boolean is_targa;        /* records user -targa switch */
  78
  79
  80 LOCAL(cjpeg_source_ptr)
  81 select_file_type (j_compress_ptr cinfo, FILE * infile)
  82 {
  83   int c;
  84
  85   if (is_targa) {
  86 #ifdef TARGA_SUPPORTED
  87     return jinit_read_targa(cinfo);
  88 #else
  89     ERREXIT(cinfo, JERR_TGA_NOTCOMP);
  90 #endif
  91   }
  92
  93   if ((c = getc(infile)) == EOF)
  94     ERREXIT(cinfo, JERR_INPUT_EMPTY);
  95   if (ungetc(c, infile) == EOF)
  96     ERREXIT(cinfo, JERR_UNGETC_FAILED);
  97
  98   switch (c) {
  99 #ifdef BMP_SUPPORTED
 100   case 'B':
 101     return jinit_read_bmp(cinfo);
 102 #endif
 103 #ifdef GIF_SUPPORTED
 104   case 'G':
 105     return jinit_read_gif(cinfo);
 106 #endif
 107 #ifdef PPM_SUPPORTED
 108   case 'P':
 109     return jinit_read_ppm(cinfo);
 110 #endif
 111 #ifdef RLE_SUPPORTED
 112   case 'R':
 113     return jinit_read_rle(cinfo);
 114 #endif
 115 #ifdef TARGA_SUPPORTED
 116   case 0x00:
 117     return jinit_read_targa(cinfo);
 118 #endif
 119   default:
 120     ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
 121     break;
 122   }
 123
 124   return NULL;                  /* suppress compiler warnings */
 125 }
 126
 127
 128 /*
 129  * Argument-parsing code.
 130  * The switch parser is designed to be useful with DOS-style command line
 131  * syntax, ie, intermixed switches and file names, where only the switches
 132  * to the left of a given file name affect processing of that file.
 133  * The main program in this file doesn't actually use this capability...
 134  */
 135
 136
 137 static const char * progname;   /* program name for error messages */
 138 static char * outfilename;      /* for -outfile switch */
 139
 140
 141 LOCAL(void)
 142 usage (void)
 143 /* complain about bad command line */
 144 {
 145   fprintf(stderr, "usage: %s [switches] ", progname);
 146 #ifdef TWO_FILE_COMMANDLINE
 147   fprintf(stderr, "inputfile outputfile\n");
 148 #else
 149   fprintf(stderr, "[inputfile]\n");
 150 #endif
 151
 152   fprintf(stderr, "Switches (names may be abbreviated):\n");
 153   fprintf(stderr, "  -quality N[,...]   Compression quality (0..100; 5-95 is useful range)\n");
 154   fprintf(stderr, "  -grayscale     Create monochrome JPEG file\n");
 155 #ifdef ENTROPY_OPT_SUPPORTED
 156   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");
 157 #endif
 158 #ifdef C_PROGRESSIVE_SUPPORTED
 159   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");
 160 #endif
 161 #ifdef DCT_SCALING_SUPPORTED
 162   fprintf(stderr, "  -scale M/N     Scale image by fraction M/N, eg, 1/2\n");
 163 #endif
 164 #ifdef TARGA_SUPPORTED
 165   fprintf(stderr, "  -targa         Input file is Targa format (usually not needed)\n");
 166 #endif
 167   fprintf(stderr, "Switches for advanced users:\n");
 168 #ifdef DCT_ISLOW_SUPPORTED
 169   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",
 170           (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
 171 #endif
 172 #ifdef DCT_IFAST_SUPPORTED
 173   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",
 174           (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
 175 #endif
 176 #ifdef DCT_FLOAT_SUPPORTED
 177   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",
 178           (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
 179 #endif
 180   fprintf(stderr, "  -nosmooth      Don't use high-quality downsampling\n");
 181   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
 182 #ifdef INPUT_SMOOTHING_SUPPORTED
 183   fprintf(stderr, "  -smooth N      Smooth dithered input (N=1..100 is strength)\n");
 184 #endif
 185   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
 186   fprintf(stderr, "  -outfile name  Specify name for output file\n");
 187   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
 188   fprintf(stderr, "Switches for wizards:\n");
 189 #ifdef C_ARITH_CODING_SUPPORTED
 190   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
 191 #endif
 192   fprintf(stderr, "  -baseline      Force baseline quantization tables\n");
 193   fprintf(stderr, "  -qtables file  Use quantization tables given in file\n");
 194   fprintf(stderr, "  -qslots N[,...]    Set component quantization tables\n");
 195   fprintf(stderr, "  -sample HxV[,...]  Set component sampling factors\n");
 196 #ifdef C_MULTISCAN_FILES_SUPPORTED
 197   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
 198 #endif
 199   exit(EXIT_FAILURE);
 200 }
 201
 202
 203 LOCAL(int)
 204 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 205                 int last_file_arg_seen, boolean for_real)
 206 /* Parse optional switches.
 207  * Returns argv[] index of first file-name argument (== argc if none).
 208  * Any file names with indexes <= last_file_arg_seen are ignored;
 209  * they have presumably been processed in a previous iteration.
 210  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
 211  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
 212  * processing.
 213  */
 214 {
 215   int argn;
 216   char * arg;
 217   boolean force_baseline;
 218   boolean simple_progressive;
 219   char * qualityarg = NULL;     /* saves -quality parm if any */
 220   char * qtablefile = NULL;     /* saves -qtables filename if any */
 221   char * qslotsarg = NULL;      /* saves -qslots parm if any */
 222   char * samplearg = NULL;      /* saves -sample parm if any */
 223   char * scansarg = NULL;       /* saves -scans parm if any */
 224
 225   /* Set up default JPEG parameters. */
 226
 227   force_baseline = FALSE;       /* by default, allow 16-bit quantizers */
 228   simple_progressive = FALSE;
 229   is_targa = FALSE;
 230   outfilename = NULL;
 231   cinfo->err->trace_level = 0;
 232
 233   /* Scan command line options, adjust parameters */
 234
 235   for (argn = 1; argn < argc; argn++) {
 236     arg = argv[argn];
 237     if (*arg != '-') {
 238       /* Not a switch, must be a file name argument */
 239       if (argn <= last_file_arg_seen) {
 240         outfilename = NULL;     /* -outfile applies to just one input file */
 241         continue;               /* ignore this name if previously processed */
 242       }
 243       break;                    /* else done parsing switches */
 244     }
 245     arg++;                      /* advance past switch marker character */
 246
 247     if (keymatch(arg, "arithmetic", 1)) {
 248       /* Use arithmetic coding. */
 249 #ifdef C_ARITH_CODING_SUPPORTED
 250       cinfo->arith_code = TRUE;
 251 #else
 252       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
 253               progname);
 254       exit(EXIT_FAILURE);
 255 #endif
 256
 257     } else if (keymatch(arg, "baseline", 1)) {
 258       /* Force baseline-compatible output (8-bit quantizer values). */
 259       force_baseline = TRUE;
 260
 261     } else if (keymatch(arg, "dct", 2)) {
 262       /* Select DCT algorithm. */
 263       if (++argn >= argc)       /* advance to next argument */
 264         usage();
 265       if (keymatch(argv[argn], "int", 1)) {
 266         cinfo->dct_method = JDCT_ISLOW;
 267       } else if (keymatch(argv[argn], "fast", 2)) {
 268         cinfo->dct_method = JDCT_IFAST;
 269       } else if (keymatch(argv[argn], "float", 2)) {
 270         cinfo->dct_method = JDCT_FLOAT;
 271       } else
 272         usage();
 273
 274     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
 275       /* Enable debug printouts. */
 276       /* On first -d, print version identification */
 277       static boolean printed_version = FALSE;
 278
 279       if (! printed_version) {
 280         fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
 281                 JVERSION, JCOPYRIGHT);
 282         printed_version = TRUE;
 283       }
 284       cinfo->err->trace_level++;
 285
 286     } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
 287       /* Force a monochrome JPEG file to be generated. */
 288       jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
 289
 290     } else if (keymatch(arg, "maxmemory", 3)) {
 291       /* Maximum memory in Kb (or Mb with 'm'). */
 292       long lval;
 293       char ch = 'x';
 294
 295       if (++argn >= argc)       /* advance to next argument */
 296         usage();
 297       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 298         usage();
 299       if (ch == 'm' || ch == 'M')
 300         lval *= 1000L;
 301       cinfo->mem->max_memory_to_use = lval * 1000L;
 302
 303     } else if (keymatch(arg, "nosmooth", 3)) {
 304       /* Suppress fancy downsampling */
 305       cinfo->do_fancy_downsampling = FALSE;
 306
 307     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
 308       /* Enable entropy parm optimization. */
 309 #ifdef ENTROPY_OPT_SUPPORTED
 310       cinfo->optimize_coding = TRUE;
 311 #else
 312       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
 313               progname);
 314       exit(EXIT_FAILURE);
 315 #endif
 316
 317     } else if (keymatch(arg, "outfile", 4)) {
 318       /* Set output file name. */
 319       if (++argn >= argc)       /* advance to next argument */
 320         usage();
 321       outfilename = argv[argn]; /* save it away for later use */
 322
 323     } else if (keymatch(arg, "progressive", 1)) {
 324       /* Select simple progressive mode. */
 325 #ifdef C_PROGRESSIVE_SUPPORTED
 326       simple_progressive = TRUE;
 327       /* We must postpone execution until num_components is known. */
 328 #else
 329       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
 330               progname);
 331       exit(EXIT_FAILURE);
 332 #endif
 333
 334     } else if (keymatch(arg, "quality", 1)) {
 335       /* Quality ratings (quantization table scaling factors). */
 336       if (++argn >= argc)       /* advance to next argument */
 337         usage();
 338       qualityarg = argv[argn];
 339
 340     } else if (keymatch(arg, "qslots", 2)) {
 341       /* Quantization table slot numbers. */
 342       if (++argn >= argc)       /* advance to next argument */
 343         usage();
 344       qslotsarg = argv[argn];
 345       /* Must delay setting qslots until after we have processed any
 346        * colorspace-determining switches, since jpeg_set_colorspace sets
 347        * default quant table numbers.
 348        */
 349
 350     } else if (keymatch(arg, "qtables", 2)) {
 351       /* Quantization tables fetched from file. */
 352       if (++argn >= argc)       /* advance to next argument */
 353         usage();
 354       qtablefile = argv[argn];
 355       /* We postpone actually reading the file in case -quality comes later. */
 356
 357     } else if (keymatch(arg, "restart", 1)) {
 358       /* Restart interval in MCU rows (or in MCUs with 'b'). */
 359       long lval;
 360       char ch = 'x';
 361
 362       if (++argn >= argc)       /* advance to next argument */
 363         usage();
 364       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 365         usage();
 366       if (lval < 0 || lval > 65535L)
 367         usage();
 368       if (ch == 'b' || ch == 'B') {
 369         cinfo->restart_interval = (unsigned int) lval;
 370         cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
 371       } else {
 372         cinfo->restart_in_rows = (int) lval;
 373         /* restart_interval will be computed during startup */
 374       }
 375
 376     } else if (keymatch(arg, "sample", 2)) {
 377       /* Set sampling factors. */
 378       if (++argn >= argc)       /* advance to next argument */
 379         usage();
 380       samplearg = argv[argn];
 381       /* Must delay setting sample factors until after we have processed any
 382        * colorspace-determining switches, since jpeg_set_colorspace sets
 383        * default sampling factors.
 384        */
 385
 386     } else if (keymatch(arg, "scale", 4)) {
 387       /* Scale the image by a fraction M/N. */
 388       if (++argn >= argc)       /* advance to next argument */
 389         usage();
 390       if (sscanf(argv[argn], "%d/%d",
 391                  &cinfo->scale_num, &cinfo->scale_denom) != 2)
 392         usage();
 393
 394     } else if (keymatch(arg, "scans", 4)) {
 395       /* Set scan script. */
 396 #ifdef C_MULTISCAN_FILES_SUPPORTED
 397       if (++argn >= argc)       /* advance to next argument */
 398         usage();
 399       scansarg = argv[argn];
 400       /* We must postpone reading the file in case -progressive appears. */
 401 #else
 402       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
 403               progname);
 404       exit(EXIT_FAILURE);
 405 #endif
 406
 407     } else if (keymatch(arg, "smooth", 2)) {
 408       /* Set input smoothing factor. */
 409       int val;
 410
 411       if (++argn >= argc)       /* advance to next argument */
 412         usage();
 413       if (sscanf(argv[argn], "%d", &val) != 1)
 414         usage();
 415       if (val < 0 || val > 100)
 416         usage();
 417       cinfo->smoothing_factor = val;
 418
 419     } else if (keymatch(arg, "targa", 1)) {
 420       /* Input file is Targa format. */
 421       is_targa = TRUE;
 422
 423     } else {
 424       usage();                  /* bogus switch */
 425     }
 426   }
 427
 428   /* Post-switch-scanning cleanup */
 429
 430   if (for_real) {
 431
 432     /* Set quantization tables for selected quality. */
 433     /* Some or all may be overridden if -qtables is present. */
 434     if (qualityarg != NULL)     /* process -quality if it was present */
 435       if (! set_quality_ratings(cinfo, qualityarg, force_baseline))
 436         usage();
 437
 438     if (qtablefile != NULL)     /* process -qtables if it was present */
 439       if (! read_quant_tables(cinfo, qtablefile, force_baseline))
 440         usage();
 441
 442     if (qslotsarg != NULL)      /* process -qslots if it was present */
 443       if (! set_quant_slots(cinfo, qslotsarg))
 444         usage();
 445
 446     if (samplearg != NULL)      /* process -sample if it was present */
 447       if (! set_sample_factors(cinfo, samplearg))
 448         usage();
 449
 450 #ifdef C_PROGRESSIVE_SUPPORTED
 451     if (simple_progressive)     /* process -progressive; -scans can override */
 452       jpeg_simple_progression(cinfo);
 453 #endif
 454
 455 #ifdef C_MULTISCAN_FILES_SUPPORTED
 456     if (scansarg != NULL)       /* process -scans if it was present */
 457       if (! read_scan_script(cinfo, scansarg))
 458         usage();
 459 #endif
 460   }
 461
 462   return argn;                  /* return index of next arg (file name) */
 463 }
 464
 465
 466 /*
 467  * The main program.
 468  */
 469
 470 int
 471 main (int argc, char **argv)
 472 {
 473   struct jpeg_compress_struct cinfo;
 474   struct jpeg_error_mgr jerr;
 475 #ifdef PROGRESS_REPORT
 476   struct cdjpeg_progress_mgr progress;
 477 #endif
 478   int file_index;
 479   cjpeg_source_ptr src_mgr;
 480   FILE * input_file;
 481   FILE * output_file;
 482   JDIMENSION num_scanlines;
 483
 484   /* On Mac, fetch a command line. */
 485 #ifdef USE_CCOMMAND
 486   argc = ccommand(&argv);
 487 #endif
 488
 489   progname = argv[0];
 490   if (progname == NULL || progname[0] == 0)
 491     progname = "cjpeg";         /* in case C library doesn't provide it */
 492
 493   /* Initialize the JPEG compression object with default error handling. */
 494   cinfo.err = jpeg_std_error(&jerr);
 495   jpeg_create_compress(&cinfo);
 496   /* Add some application-specific error messages (from cderror.h) */
 497   jerr.addon_message_table = cdjpeg_message_table;
 498   jerr.first_addon_message = JMSG_FIRSTADDONCODE;
 499   jerr.last_addon_message = JMSG_LASTADDONCODE;
 500
 501   /* Now safe to enable signal catcher. */
 502 #ifdef NEED_SIGNAL_CATCHER
 503   enable_signal_catcher((j_common_ptr) &cinfo);
 504 #endif
 505
 506   /* Initialize JPEG parameters.
 507    * Much of this may be overridden later.
 508    * In particular, we don't yet know the input file's color space,
 509    * but we need to provide some value for jpeg_set_defaults() to work.
 510    */
 511
 512   cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
 513   jpeg_set_defaults(&cinfo);
 514
 515   /* Scan command line to find file names.
 516    * It is convenient to use just one switch-parsing routine, but the switch
 517    * values read here are ignored; we will rescan the switches after opening
 518    * the input file.
 519    */
 520
 521   file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
 522
 523 #ifdef TWO_FILE_COMMANDLINE
 524   /* Must have either -outfile switch or explicit output file name */
 525   if (outfilename == NULL) {
 526     if (file_index != argc-2) {
 527       fprintf(stderr, "%s: must name one input and one output file\n",
 528               progname);
 529       usage();
 530     }
 531     outfilename = argv[file_index+1];
 532   } else {
 533     if (file_index != argc-1) {
 534       fprintf(stderr, "%s: must name one input and one output file\n",
 535               progname);
 536       usage();
 537     }
 538   }
 539 #else
 540   /* Unix style: expect zero or one file name */
 541   if (file_index < argc-1) {
 542     fprintf(stderr, "%s: only one input file\n", progname);
 543     usage();
 544   }
 545 #endif /* TWO_FILE_COMMANDLINE */
 546
 547   /* Open the input file. */
 548   if (file_index < argc) {
 549     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
 550       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
 551       exit(EXIT_FAILURE);
 552     }
 553   } else {
 554     /* default input file is stdin */
 555     input_file = read_stdin();
 556   }
 557
 558   /* Open the output file. */
 559   if (outfilename != NULL) {
 560     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
 561       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
 562       exit(EXIT_FAILURE);
 563     }
 564   } else {
 565     /* default output file is stdout */
 566     output_file = write_stdout();
 567   }
 568
 569 #ifdef PROGRESS_REPORT
 570   start_progress_monitor((j_common_ptr) &cinfo, &progress);
 571 #endif
 572
 573   /* Figure out the input file format, and set up to read it. */
 574   src_mgr = select_file_type(&cinfo, input_file);
 575   src_mgr->input_file = input_file;
 576
 577   /* Read the input file header to obtain file size & colorspace. */
 578   (*src_mgr->start_input) (&cinfo, src_mgr);
 579
 580   /* Now that we know input colorspace, fix colorspace-dependent defaults */
 581   jpeg_default_colorspace(&cinfo);
 582
 583   /* Adjust default compression parameters by re-parsing the options */
 584   file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
 585
 586   /* Specify data destination for compression */
 587   jpeg_stdio_dest(&cinfo, output_file);
 588
 589   /* Start compressor */
 590   jpeg_start_compress(&cinfo, TRUE);
 591
 592   /* Process data */
 593   while (cinfo.next_scanline < cinfo.image_height) {
 594     num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
 595     (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
 596   }
 597
 598   /* Finish compression and release memory */
 599   (*src_mgr->finish_input) (&cinfo, src_mgr);
 600   jpeg_finish_compress(&cinfo);
 601   jpeg_destroy_compress(&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 }