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cjpeg.c
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00001 /*
00002  * cjpeg.c
00003  *
00004  * Copyright (C) 1991-1998, Thomas G. Lane.
00005  * This file is part of the Independent JPEG Group's software.
00006  * For conditions of distribution and use, see the accompanying README file.
00007  *
00008  * This file contains a command-line user interface for the JPEG compressor.
00009  * It should work on any system with Unix- or MS-DOS-style command lines.
00010  *
00011  * Two different command line styles are permitted, depending on the
00012  * compile-time switch TWO_FILE_COMMANDLINE:
00013  *     cjpeg [options]  inputfile outputfile
00014  *     cjpeg [options]  [inputfile]
00015  * In the second style, output is always to standard output, which you'd
00016  * normally redirect to a file or pipe to some other program.  Input is
00017  * either from a named file or from standard input (typically redirected).
00018  * The second style is convenient on Unix but is unhelpful on systems that
00019  * don't support pipes.  Also, you MUST use the first style if your system
00020  * doesn't do binary I/O to stdin/stdout.
00021  * To simplify script writing, the "-outfile" switch is provided.  The syntax
00022  *     cjpeg [options]  -outfile outputfile  inputfile
00023  * works regardless of which command line style is used.
00024  */
00025 
00026 #include "cdjpeg.h"         /* Common decls for cjpeg/djpeg applications */
00027 #include "jversion.h"              /* for version message */
00028 
00029 #ifdef USE_CCOMMAND         /* command-line reader for Macintosh */
00030 #ifdef __MWERKS__
00031 #include <SIOUX.h>              /* Metrowerks needs this */
00032 #include <console.h>        /* ... and this */
00033 #endif
00034 #ifdef THINK_C
00035 #include <console.h>        /* Think declares it here */
00036 #endif
00037 #endif
00038 
00039 
00040 /* Create the add-on message string table. */
00041 
00042 #define JMESSAGE(code,string)      string ,
00043 
00044 static const char * const cdjpeg_message_table[] = {
00045 #include "cderror.h"
00046   NULL
00047 };
00048 
00049 
00050 /*
00051  * This routine determines what format the input file is,
00052  * and selects the appropriate input-reading module.
00053  *
00054  * To determine which family of input formats the file belongs to,
00055  * we may look only at the first byte of the file, since C does not
00056  * guarantee that more than one character can be pushed back with ungetc.
00057  * Looking at additional bytes would require one of these approaches:
00058  *     1) assume we can fseek() the input file (fails for piped input);
00059  *     2) assume we can push back more than one character (works in
00060  *        some C implementations, but unportable);
00061  *     3) provide our own buffering (breaks input readers that want to use
00062  *        stdio directly, such as the RLE library);
00063  * or  4) don't put back the data, and modify the input_init methods to assume
00064  *        they start reading after the start of file (also breaks RLE library).
00065  * #1 is attractive for MS-DOS but is untenable on Unix.
00066  *
00067  * The most portable solution for file types that can't be identified by their
00068  * first byte is to make the user tell us what they are.  This is also the
00069  * only approach for "raw" file types that contain only arbitrary values.
00070  * We presently apply this method for Targa files.  Most of the time Targa
00071  * files start with 0x00, so we recognize that case.  Potentially, however,
00072  * a Targa file could start with any byte value (byte 0 is the length of the
00073  * seldom-used ID field), so we provide a switch to force Targa input mode.
00074  */
00075 
00076 static boolean is_targa;    /* records user -targa switch */
00077 
00078 
00079 LOCAL(cjpeg_source_ptr)
00080 select_file_type (j_compress_ptr cinfo, FILE * infile)
00081 {
00082   int c;
00083 
00084   if (is_targa) {
00085 #ifdef TARGA_SUPPORTED
00086     return jinit_read_targa(cinfo);
00087 #else
00088     ERREXIT(cinfo, JERR_TGA_NOTCOMP);
00089 #endif
00090   }
00091 
00092   if ((c = getc(infile)) == EOF)
00093     ERREXIT(cinfo, JERR_INPUT_EMPTY);
00094   if (ungetc(c, infile) == EOF)
00095     ERREXIT(cinfo, JERR_UNGETC_FAILED);
00096 
00097   switch (c) {
00098 #ifdef BMP_SUPPORTED
00099   case 'B':
00100     return jinit_read_bmp(cinfo);
00101 #endif
00102 #ifdef GIF_SUPPORTED
00103   case 'G':
00104     return jinit_read_gif(cinfo);
00105 #endif
00106 #ifdef PPM_SUPPORTED
00107   case 'P':
00108     return jinit_read_ppm(cinfo);
00109 #endif
00110 #ifdef RLE_SUPPORTED
00111   case 'R':
00112     return jinit_read_rle(cinfo);
00113 #endif
00114 #ifdef TARGA_SUPPORTED
00115   case 0x00:
00116     return jinit_read_targa(cinfo);
00117 #endif
00118   default:
00119     ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
00120     break;
00121   }
00122 
00123   return NULL;                     /* suppress compiler warnings */
00124 }
00125 
00126 
00127 /*
00128  * Argument-parsing code.
00129  * The switch parser is designed to be useful with DOS-style command line
00130  * syntax, ie, intermixed switches and file names, where only the switches
00131  * to the left of a given file name affect processing of that file.
00132  * The main program in this file doesn't actually use this capability...
00133  */
00134 
00135 
00136 static const char * progname;      /* program name for error messages */
00137 static char * outfilename;  /* for -outfile switch */
00138 
00139 
00140 LOCAL(void)
00141 usage (void)
00142 /* complain about bad command line */
00143 {
00144   fprintf(stderr, "usage: %s [switches] ", progname);
00145 #ifdef TWO_FILE_COMMANDLINE
00146   fprintf(stderr, "inputfile outputfile\n");
00147 #else
00148   fprintf(stderr, "[inputfile]\n");
00149 #endif
00150 
00151   fprintf(stderr, "Switches (names may be abbreviated):\n");
00152   fprintf(stderr, "  -quality N     Compression quality (0..100; 5-95 is useful range)\n");
00153   fprintf(stderr, "  -grayscale     Create monochrome JPEG file\n");
00154 #ifdef ENTROPY_OPT_SUPPORTED
00155   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");
00156 #endif
00157 #ifdef C_PROGRESSIVE_SUPPORTED
00158   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");
00159 #endif
00160 #ifdef TARGA_SUPPORTED
00161   fprintf(stderr, "  -targa         Input file is Targa format (usually not needed)\n");
00162 #endif
00163   fprintf(stderr, "Switches for advanced users:\n");
00164 #ifdef DCT_ISLOW_SUPPORTED
00165   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",
00166          (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
00167 #endif
00168 #ifdef DCT_IFAST_SUPPORTED
00169   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",
00170          (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
00171 #endif
00172 #ifdef DCT_FLOAT_SUPPORTED
00173   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",
00174          (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
00175 #endif
00176   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
00177 #ifdef INPUT_SMOOTHING_SUPPORTED
00178   fprintf(stderr, "  -smooth N      Smooth dithered input (N=1..100 is strength)\n");
00179 #endif
00180   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
00181   fprintf(stderr, "  -outfile name  Specify name for output file\n");
00182   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
00183   fprintf(stderr, "Switches for wizards:\n");
00184 #ifdef C_ARITH_CODING_SUPPORTED
00185   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
00186 #endif
00187   fprintf(stderr, "  -baseline      Force baseline quantization tables\n");
00188   fprintf(stderr, "  -qtables file  Use quantization tables given in file\n");
00189   fprintf(stderr, "  -qslots N[,...]    Set component quantization tables\n");
00190   fprintf(stderr, "  -sample HxV[,...]  Set component sampling factors\n");
00191 #ifdef C_MULTISCAN_FILES_SUPPORTED
00192   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
00193 #endif
00194   exit(EXIT_FAILURE);
00195 }
00196 
00197 
00198 LOCAL(int)
00199 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
00200               int last_file_arg_seen, boolean for_real)
00201 /* Parse optional switches.
00202  * Returns argv[] index of first file-name argument (== argc if none).
00203  * Any file names with indexes <= last_file_arg_seen are ignored;
00204  * they have presumably been processed in a previous iteration.
00205  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
00206  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
00207  * processing.
00208  */
00209 {
00210   int argn;
00211   char * arg;
00212   int quality;                     /* -quality parameter */
00213   int q_scale_factor;              /* scaling percentage for -qtables */
00214   boolean force_baseline;
00215   boolean simple_progressive;
00216   char * qtablefile = NULL; /* saves -qtables filename if any */
00217   char * qslotsarg = NULL;  /* saves -qslots parm if any */
00218   char * samplearg = NULL;  /* saves -sample parm if any */
00219   char * scansarg = NULL;   /* saves -scans parm if any */
00220 
00221   /* Set up default JPEG parameters. */
00222   /* Note that default -quality level need not, and does not,
00223    * match the default scaling for an explicit -qtables argument.
00224    */
00225   quality = 75;                    /* default -quality value */
00226   q_scale_factor = 100;            /* default to no scaling for -qtables */
00227   force_baseline = FALSE;   /* by default, allow 16-bit quantizers */
00228   simple_progressive = FALSE;
00229   is_targa = FALSE;
00230   outfilename = NULL;
00231   cinfo->err->trace_level = 0;
00232 
00233   /* Scan command line options, adjust parameters */
00234 
00235   for (argn = 1; argn < argc; argn++) {
00236     arg = argv[argn];
00237     if (*arg != '-') {
00238       /* Not a switch, must be a file name argument */
00239       if (argn <= last_file_arg_seen) {
00240        outfilename = NULL;  /* -outfile applies to just one input file */
00241        continue;            /* ignore this name if previously processed */
00242       }
00243       break;                /* else done parsing switches */
00244     }
00245     arg++;                  /* advance past switch marker character */
00246 
00247     if (keymatch(arg, "arithmetic", 1)) {
00248       /* Use arithmetic coding. */
00249 #ifdef C_ARITH_CODING_SUPPORTED
00250       cinfo->arith_code = TRUE;
00251 #else
00252       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
00253              progname);
00254       exit(EXIT_FAILURE);
00255 #endif
00256 
00257     } else if (keymatch(arg, "baseline", 1)) {
00258       /* Force baseline-compatible output (8-bit quantizer values). */
00259       force_baseline = TRUE;
00260 
00261     } else if (keymatch(arg, "dct", 2)) {
00262       /* Select DCT algorithm. */
00263       if (++argn >= argc)   /* advance to next argument */
00264        usage();
00265       if (keymatch(argv[argn], "int", 1)) {
00266        cinfo->dct_method = JDCT_ISLOW;
00267       } else if (keymatch(argv[argn], "fast", 2)) {
00268        cinfo->dct_method = JDCT_IFAST;
00269       } else if (keymatch(argv[argn], "float", 2)) {
00270        cinfo->dct_method = JDCT_FLOAT;
00271       } else
00272        usage();
00273 
00274     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
00275       /* Enable debug printouts. */
00276       /* On first -d, print version identification */
00277       static boolean printed_version = FALSE;
00278 
00279       if (! printed_version) {
00280        fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
00281               JVERSION, JCOPYRIGHT);
00282        printed_version = TRUE;
00283       }
00284       cinfo->err->trace_level++;
00285 
00286     } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
00287       /* Force a monochrome JPEG file to be generated. */
00288       jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
00289 
00290     } else if (keymatch(arg, "maxmemory", 3)) {
00291       /* Maximum memory in Kb (or Mb with 'm'). */
00292       long lval;
00293       char ch = 'x';
00294 
00295       if (++argn >= argc)   /* advance to next argument */
00296        usage();
00297       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
00298        usage();
00299       if (ch == 'm' || ch == 'M')
00300        lval *= 1000L;
00301       cinfo->mem->max_memory_to_use = lval * 1000L;
00302 
00303     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
00304       /* Enable entropy parm optimization. */
00305 #ifdef ENTROPY_OPT_SUPPORTED
00306       cinfo->optimize_coding = TRUE;
00307 #else
00308       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
00309              progname);
00310       exit(EXIT_FAILURE);
00311 #endif
00312 
00313     } else if (keymatch(arg, "outfile", 4)) {
00314       /* Set output file name. */
00315       if (++argn >= argc)   /* advance to next argument */
00316        usage();
00317       outfilename = argv[argn];    /* save it away for later use */
00318 
00319     } else if (keymatch(arg, "progressive", 1)) {
00320       /* Select simple progressive mode. */
00321 #ifdef C_PROGRESSIVE_SUPPORTED
00322       simple_progressive = TRUE;
00323       /* We must postpone execution until num_components is known. */
00324 #else
00325       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
00326              progname);
00327       exit(EXIT_FAILURE);
00328 #endif
00329 
00330     } else if (keymatch(arg, "quality", 1)) {
00331       /* Quality factor (quantization table scaling factor). */
00332       if (++argn >= argc)   /* advance to next argument */
00333        usage();
00334       if (sscanf(argv[argn], "%d", &quality) != 1)
00335        usage();
00336       /* Change scale factor in case -qtables is present. */
00337       q_scale_factor = jpeg_quality_scaling(quality);
00338 
00339     } else if (keymatch(arg, "qslots", 2)) {
00340       /* Quantization table slot numbers. */
00341       if (++argn >= argc)   /* advance to next argument */
00342        usage();
00343       qslotsarg = argv[argn];
00344       /* Must delay setting qslots until after we have processed any
00345        * colorspace-determining switches, since jpeg_set_colorspace sets
00346        * default quant table numbers.
00347        */
00348 
00349     } else if (keymatch(arg, "qtables", 2)) {
00350       /* Quantization tables fetched from file. */
00351       if (++argn >= argc)   /* advance to next argument */
00352        usage();
00353       qtablefile = argv[argn];
00354       /* We postpone actually reading the file in case -quality comes later. */
00355 
00356     } else if (keymatch(arg, "restart", 1)) {
00357       /* Restart interval in MCU rows (or in MCUs with 'b'). */
00358       long lval;
00359       char ch = 'x';
00360 
00361       if (++argn >= argc)   /* advance to next argument */
00362        usage();
00363       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
00364        usage();
00365       if (lval < 0 || lval > 65535L)
00366        usage();
00367       if (ch == 'b' || ch == 'B') {
00368        cinfo->restart_interval = (unsigned int) lval;
00369        cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
00370       } else {
00371        cinfo->restart_in_rows = (int) lval;
00372        /* restart_interval will be computed during startup */
00373       }
00374 
00375     } else if (keymatch(arg, "sample", 2)) {
00376       /* Set sampling factors. */
00377       if (++argn >= argc)   /* advance to next argument */
00378        usage();
00379       samplearg = argv[argn];
00380       /* Must delay setting sample factors until after we have processed any
00381        * colorspace-determining switches, since jpeg_set_colorspace sets
00382        * default sampling factors.
00383        */
00384 
00385     } else if (keymatch(arg, "scans", 2)) {
00386       /* Set scan script. */
00387 #ifdef C_MULTISCAN_FILES_SUPPORTED
00388       if (++argn >= argc)   /* advance to next argument */
00389        usage();
00390       scansarg = argv[argn];
00391       /* We must postpone reading the file in case -progressive appears. */
00392 #else
00393       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
00394              progname);
00395       exit(EXIT_FAILURE);
00396 #endif
00397 
00398     } else if (keymatch(arg, "smooth", 2)) {
00399       /* Set input smoothing factor. */
00400       int val;
00401 
00402       if (++argn >= argc)   /* advance to next argument */
00403        usage();
00404       if (sscanf(argv[argn], "%d", &val) != 1)
00405        usage();
00406       if (val < 0 || val > 100)
00407        usage();
00408       cinfo->smoothing_factor = val;
00409 
00410     } else if (keymatch(arg, "targa", 1)) {
00411       /* Input file is Targa format. */
00412       is_targa = TRUE;
00413 
00414     } else {
00415       usage();                     /* bogus switch */
00416     }
00417   }
00418 
00419   /* Post-switch-scanning cleanup */
00420 
00421   if (for_real) {
00422 
00423     /* Set quantization tables for selected quality. */
00424     /* Some or all may be overridden if -qtables is present. */
00425     jpeg_set_quality(cinfo, quality, force_baseline);
00426 
00427     if (qtablefile != NULL) /* process -qtables if it was present */
00428       if (! read_quant_tables(cinfo, qtablefile,
00429                            q_scale_factor, force_baseline))
00430        usage();
00431 
00432     if (qslotsarg != NULL)  /* process -qslots if it was present */
00433       if (! set_quant_slots(cinfo, qslotsarg))
00434        usage();
00435 
00436     if (samplearg != NULL)  /* process -sample if it was present */
00437       if (! set_sample_factors(cinfo, samplearg))
00438        usage();
00439 
00440 #ifdef C_PROGRESSIVE_SUPPORTED
00441     if (simple_progressive) /* process -progressive; -scans can override */
00442       jpeg_simple_progression(cinfo);
00443 #endif
00444 
00445 #ifdef C_MULTISCAN_FILES_SUPPORTED
00446     if (scansarg != NULL)   /* process -scans if it was present */
00447       if (! read_scan_script(cinfo, scansarg))
00448        usage();
00449 #endif
00450   }
00451 
00452   return argn;                     /* return index of next arg (file name) */
00453 }
00454 
00455 
00456 /*
00457  * The main program.
00458  */
00459 
00460 int
00461 main (int argc, char **argv)
00462 {
00463   struct jpeg_compress_struct cinfo;
00464   struct jpeg_error_mgr jerr;
00465 #ifdef PROGRESS_REPORT
00466   struct cdjpeg_progress_mgr progress;
00467 #endif
00468   int file_index;
00469   cjpeg_source_ptr src_mgr;
00470   FILE * input_file;
00471   FILE * output_file;
00472   JDIMENSION num_scanlines;
00473 
00474   /* On Mac, fetch a command line. */
00475 #ifdef USE_CCOMMAND
00476   argc = ccommand(&argv);
00477 #endif
00478 
00479   progname = argv[0];
00480   if (progname == NULL || progname[0] == 0)
00481     progname = "cjpeg";            /* in case C library doesn't provide it */
00482 
00483   /* Initialize the JPEG compression object with default error handling. */
00484   cinfo.err = jpeg_std_error(&jerr);
00485   jpeg_create_compress(&cinfo);
00486   /* Add some application-specific error messages (from cderror.h) */
00487   jerr.addon_message_table = cdjpeg_message_table;
00488   jerr.first_addon_message = JMSG_FIRSTADDONCODE;
00489   jerr.last_addon_message = JMSG_LASTADDONCODE;
00490 
00491   /* Now safe to enable signal catcher. */
00492 #ifdef NEED_SIGNAL_CATCHER
00493   enable_signal_catcher((j_common_ptr) &cinfo);
00494 #endif
00495 
00496   /* Initialize JPEG parameters.
00497    * Much of this may be overridden later.
00498    * In particular, we don't yet know the input file's color space,
00499    * but we need to provide some value for jpeg_set_defaults() to work.
00500    */
00501 
00502   cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
00503   jpeg_set_defaults(&cinfo);
00504 
00505   /* Scan command line to find file names.
00506    * It is convenient to use just one switch-parsing routine, but the switch
00507    * values read here are ignored; we will rescan the switches after opening
00508    * the input file.
00509    */
00510 
00511   file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
00512 
00513 #ifdef TWO_FILE_COMMANDLINE
00514   /* Must have either -outfile switch or explicit output file name */
00515   if (outfilename == NULL) {
00516     if (file_index != argc-2) {
00517       fprintf(stderr, "%s: must name one input and one output file\n",
00518              progname);
00519       usage();
00520     }
00521     outfilename = argv[file_index+1];
00522   } else {
00523     if (file_index != argc-1) {
00524       fprintf(stderr, "%s: must name one input and one output file\n",
00525              progname);
00526       usage();
00527     }
00528   }
00529 #else
00530   /* Unix style: expect zero or one file name */
00531   if (file_index < argc-1) {
00532     fprintf(stderr, "%s: only one input file\n", progname);
00533     usage();
00534   }
00535 #endif /* TWO_FILE_COMMANDLINE */
00536 
00537   /* Open the input file. */
00538   if (file_index < argc) {
00539     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
00540       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
00541       exit(EXIT_FAILURE);
00542     }
00543   } else {
00544     /* default input file is stdin */
00545     input_file = read_stdin();
00546   }
00547 
00548   /* Open the output file. */
00549   if (outfilename != NULL) {
00550     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
00551       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
00552       exit(EXIT_FAILURE);
00553     }
00554   } else {
00555     /* default output file is stdout */
00556     output_file = write_stdout();
00557   }
00558 
00559 #ifdef PROGRESS_REPORT
00560   start_progress_monitor((j_common_ptr) &cinfo, &progress);
00561 #endif
00562 
00563   /* Figure out the input file format, and set up to read it. */
00564   src_mgr = select_file_type(&cinfo, input_file);
00565   src_mgr->input_file = input_file;
00566 
00567   /* Read the input file header to obtain file size & colorspace. */
00568   (*src_mgr->start_input) (&cinfo, src_mgr);
00569 
00570   /* Now that we know input colorspace, fix colorspace-dependent defaults */
00571   jpeg_default_colorspace(&cinfo);
00572 
00573   /* Adjust default compression parameters by re-parsing the options */
00574   file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
00575 
00576   /* Specify data destination for compression */
00577   jpeg_stdio_dest(&cinfo, output_file);
00578 
00579   /* Start compressor */
00580   jpeg_start_compress(&cinfo, TRUE);
00581 
00582   /* Process data */
00583   while (cinfo.next_scanline < cinfo.image_height) {
00584     num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
00585     (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
00586   }
00587 
00588   /* Finish compression and release memory */
00589   (*src_mgr->finish_input) (&cinfo, src_mgr);
00590   jpeg_finish_compress(&cinfo);
00591   jpeg_destroy_compress(&cinfo);
00592 
00593   /* Close files, if we opened them */
00594   if (input_file != stdin)
00595     fclose(input_file);
00596   if (output_file != stdout)
00597     fclose(output_file);
00598 
00599 #ifdef PROGRESS_REPORT
00600   end_progress_monitor((j_common_ptr) &cinfo);
00601 #endif
00602 
00603   /* All done. */
00604   exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
00605   return 0;                 /* suppress no-return-value warnings */
00606 }