00604                                         : EXIT_SUCCESS);
00605   return 0;                     /* suppress no-return-value warnings */
00606 }

00339                                            {
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);

00235                                       {
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 

00274                                                                          {
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);