workbench/libs/jpeg/jpegtran.c

   1 /*
   2  * jpegtran.c
   3  *
   4  * Copyright (C) 1995-2013, Thomas G. Lane, Guido Vollbeding.
   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 JPEG transcoding.
   9  * It is very similar to cjpeg.c, and partly to djpeg.c, but provides
  10  * lossless transcoding between different JPEG file formats.  It also
  11  * provides some lossless and sort-of-lossless transformations of JPEG data.
  12  */
  13
  14 #include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
  15 #include "transupp.h"           /* Support routines for jpegtran */
  16 #include "jversion.h"           /* for version message */
  17
  18 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
  19 #ifdef __MWERKS__
  20 #include <SIOUX.h>              /* Metrowerks needs this */
  21 #include <console.h>            /* ... and this */
  22 #endif
  23 #ifdef THINK_C
  24 #include <console.h>            /* Think declares it here */
  25 #endif
  26 #endif
  27
  28
  29 /*
  30  * Argument-parsing code.
  31  * The switch parser is designed to be useful with DOS-style command line
  32  * syntax, ie, intermixed switches and file names, where only the switches
  33  * to the left of a given file name affect processing of that file.
  34  * The main program in this file doesn't actually use this capability...
  35  */
  36
  37
  38 static const char * progname;   /* program name for error messages */
  39 static char * outfilename;      /* for -outfile switch */
  40 static char * scaleoption;      /* -scale switch */
  41 static JCOPY_OPTION copyoption; /* -copy switch */
  42 static jpeg_transform_info transformoption; /* image transformation options */
  43
  44
  45 LOCAL(void)
  46 usage (void)
  47 /* complain about bad command line */
  48 {
  49   fprintf(stderr, "usage: %s [switches] ", progname);
  50 #ifdef TWO_FILE_COMMANDLINE
  51   fprintf(stderr, "inputfile outputfile\n");
  52 #else
  53   fprintf(stderr, "[inputfile]\n");
  54 #endif
  55
  56   fprintf(stderr, "Switches (names may be abbreviated):\n");
  57   fprintf(stderr, "  -copy none     Copy no extra markers from source file\n");
  58   fprintf(stderr, "  -copy comments Copy only comment markers (default)\n");
  59   fprintf(stderr, "  -copy all      Copy all extra markers\n");
  60 #ifdef ENTROPY_OPT_SUPPORTED
  61   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");
  62 #endif
  63 #ifdef C_PROGRESSIVE_SUPPORTED
  64   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");
  65 #endif
  66   fprintf(stderr, "Switches for modifying the image:\n");
  67 #if TRANSFORMS_SUPPORTED
  68   fprintf(stderr, "  -crop WxH+X+Y  Crop to a rectangular subarea\n");
  69   fprintf(stderr, "  -flip [horizontal|vertical]  Mirror image (left-right or top-bottom)\n");
  70   fprintf(stderr, "  -grayscale     Reduce to grayscale (omit color data)\n");
  71   fprintf(stderr, "  -perfect       Fail if there is non-transformable edge blocks\n");
  72   fprintf(stderr, "  -rotate [90|180|270]         Rotate image (degrees clockwise)\n");
  73 #endif
  74   fprintf(stderr, "  -scale M/N     Scale output image by fraction M/N, eg, 1/8\n");
  75 #if TRANSFORMS_SUPPORTED
  76   fprintf(stderr, "  -transpose     Transpose image\n");
  77   fprintf(stderr, "  -transverse    Transverse transpose image\n");
  78   fprintf(stderr, "  -trim          Drop non-transformable edge blocks\n");
  79   fprintf(stderr, "  -wipe WxH+X+Y  Wipe (gray out) a rectangular subarea\n");
  80 #endif
  81   fprintf(stderr, "Switches for advanced users:\n");
  82 #ifdef C_ARITH_CODING_SUPPORTED
  83   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
  84 #endif
  85   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
  86   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
  87   fprintf(stderr, "  -outfile name  Specify name for output file\n");
  88   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
  89   fprintf(stderr, "Switches for wizards:\n");
  90 #ifdef C_MULTISCAN_FILES_SUPPORTED
  91   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
  92 #endif
  93   exit(EXIT_FAILURE);
  94 }
  95
  96
  97 LOCAL(void)
  98 select_transform (JXFORM_CODE transform)
  99 /* Silly little routine to detect multiple transform options,
 100  * which we can't handle.
 101  */
 102 {
 103 #if TRANSFORMS_SUPPORTED
 104   if (transformoption.transform == JXFORM_NONE ||
 105       transformoption.transform == transform) {
 106     transformoption.transform = transform;
 107   } else {
 108     fprintf(stderr, "%s: can only do one image transformation at a time\n",
 109             progname);
 110     usage();
 111   }
 112 #else
 113   fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
 114           progname);
 115   exit(EXIT_FAILURE);
 116 #endif
 117 }
 118
 119
 120 LOCAL(int)
 121 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 122                 int last_file_arg_seen, boolean for_real)
 123 /* Parse optional switches.
 124  * Returns argv[] index of first file-name argument (== argc if none).
 125  * Any file names with indexes <= last_file_arg_seen are ignored;
 126  * they have presumably been processed in a previous iteration.
 127  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
 128  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
 129  * processing.
 130  */
 131 {
 132   int argn;
 133   char * arg;
 134   boolean simple_progressive;
 135   char * scansarg = NULL;       /* saves -scans parm if any */
 136
 137   /* Set up default JPEG parameters. */
 138   simple_progressive = FALSE;
 139   outfilename = NULL;
 140   scaleoption = NULL;
 141   copyoption = JCOPYOPT_DEFAULT;
 142   transformoption.transform = JXFORM_NONE;
 143   transformoption.perfect = FALSE;
 144   transformoption.trim = FALSE;
 145   transformoption.force_grayscale = FALSE;
 146   transformoption.crop = FALSE;
 147   cinfo->err->trace_level = 0;
 148
 149   /* Scan command line options, adjust parameters */
 150
 151   for (argn = 1; argn < argc; argn++) {
 152     arg = argv[argn];
 153     if (*arg != '-') {
 154       /* Not a switch, must be a file name argument */
 155       if (argn <= last_file_arg_seen) {
 156         outfilename = NULL;     /* -outfile applies to just one input file */
 157         continue;               /* ignore this name if previously processed */
 158       }
 159       break;                    /* else done parsing switches */
 160     }
 161     arg++;                      /* advance past switch marker character */
 162
 163     if (keymatch(arg, "arithmetic", 1)) {
 164       /* Use arithmetic coding. */
 165 #ifdef C_ARITH_CODING_SUPPORTED
 166       cinfo->arith_code = TRUE;
 167 #else
 168       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
 169               progname);
 170       exit(EXIT_FAILURE);
 171 #endif
 172
 173     } else if (keymatch(arg, "copy", 2)) {
 174       /* Select which extra markers to copy. */
 175       if (++argn >= argc)       /* advance to next argument */
 176         usage();
 177       if (keymatch(argv[argn], "none", 1)) {
 178         copyoption = JCOPYOPT_NONE;
 179       } else if (keymatch(argv[argn], "comments", 1)) {
 180         copyoption = JCOPYOPT_COMMENTS;
 181       } else if (keymatch(argv[argn], "all", 1)) {
 182         copyoption = JCOPYOPT_ALL;
 183       } else
 184         usage();
 185
 186     } else if (keymatch(arg, "crop", 2)) {
 187       /* Perform lossless cropping. */
 188 #if TRANSFORMS_SUPPORTED
 189       if (++argn >= argc)       /* advance to next argument */
 190         usage();
 191       if (transformoption.crop /* reject multiple crop/wipe requests */ ||
 192           ! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
 193         fprintf(stderr, "%s: bogus -crop argument '%s'\n",
 194                 progname, argv[argn]);
 195         exit(EXIT_FAILURE);
 196       }
 197 #else
 198       select_transform(JXFORM_NONE);    /* force an error */
 199 #endif
 200
 201     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
 202       /* Enable debug printouts. */
 203       /* On first -d, print version identification */
 204       static boolean printed_version = FALSE;
 205
 206       if (! printed_version) {
 207         fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
 208                 JVERSION, JCOPYRIGHT);
 209         printed_version = TRUE;
 210       }
 211       cinfo->err->trace_level++;
 212
 213     } else if (keymatch(arg, "flip", 1)) {
 214       /* Mirror left-right or top-bottom. */
 215       if (++argn >= argc)       /* advance to next argument */
 216         usage();
 217       if (keymatch(argv[argn], "horizontal", 1))
 218         select_transform(JXFORM_FLIP_H);
 219       else if (keymatch(argv[argn], "vertical", 1))
 220         select_transform(JXFORM_FLIP_V);
 221       else
 222         usage();
 223
 224     } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
 225       /* Force to grayscale. */
 226 #if TRANSFORMS_SUPPORTED
 227       transformoption.force_grayscale = TRUE;
 228 #else
 229       select_transform(JXFORM_NONE);    /* force an error */
 230 #endif
 231
 232     } else if (keymatch(arg, "maxmemory", 3)) {
 233       /* Maximum memory in Kb (or Mb with 'm'). */
 234       long lval;
 235       char ch = 'x';
 236
 237       if (++argn >= argc)       /* advance to next argument */
 238         usage();
 239       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 240         usage();
 241       if (ch == 'm' || ch == 'M')
 242         lval *= 1000L;
 243       cinfo->mem->max_memory_to_use = lval * 1000L;
 244
 245     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
 246       /* Enable entropy parm optimization. */
 247 #ifdef ENTROPY_OPT_SUPPORTED
 248       cinfo->optimize_coding = TRUE;
 249 #else
 250       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
 251               progname);
 252       exit(EXIT_FAILURE);
 253 #endif
 254
 255     } else if (keymatch(arg, "outfile", 4)) {
 256       /* Set output file name. */
 257       if (++argn >= argc)       /* advance to next argument */
 258         usage();
 259       outfilename = argv[argn]; /* save it away for later use */
 260
 261     } else if (keymatch(arg, "perfect", 2)) {
 262       /* Fail if there is any partial edge MCUs that the transform can't
 263        * handle. */
 264       transformoption.perfect = TRUE;
 265
 266     } else if (keymatch(arg, "progressive", 2)) {
 267       /* Select simple progressive mode. */
 268 #ifdef C_PROGRESSIVE_SUPPORTED
 269       simple_progressive = TRUE;
 270       /* We must postpone execution until num_components is known. */
 271 #else
 272       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
 273               progname);
 274       exit(EXIT_FAILURE);
 275 #endif
 276
 277     } else if (keymatch(arg, "restart", 1)) {
 278       /* Restart interval in MCU rows (or in MCUs with 'b'). */
 279       long lval;
 280       char ch = 'x';
 281
 282       if (++argn >= argc)       /* advance to next argument */
 283         usage();
 284       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 285         usage();
 286       if (lval < 0 || lval > 65535L)
 287         usage();
 288       if (ch == 'b' || ch == 'B') {
 289         cinfo->restart_interval = (unsigned int) lval;
 290         cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
 291       } else {
 292         cinfo->restart_in_rows = (int) lval;
 293         /* restart_interval will be computed during startup */
 294       }
 295
 296     } else if (keymatch(arg, "rotate", 2)) {
 297       /* Rotate 90, 180, or 270 degrees (measured clockwise). */
 298       if (++argn >= argc)       /* advance to next argument */
 299         usage();
 300       if (keymatch(argv[argn], "90", 2))
 301         select_transform(JXFORM_ROT_90);
 302       else if (keymatch(argv[argn], "180", 3))
 303         select_transform(JXFORM_ROT_180);
 304       else if (keymatch(argv[argn], "270", 3))
 305         select_transform(JXFORM_ROT_270);
 306       else
 307         usage();
 308
 309     } else if (keymatch(arg, "scale", 4)) {
 310       /* Scale the output image by a fraction M/N. */
 311       if (++argn >= argc)       /* advance to next argument */
 312         usage();
 313       scaleoption = argv[argn];
 314       /* We must postpone processing until decompression startup. */
 315
 316     } else if (keymatch(arg, "scans", 1)) {
 317       /* Set scan script. */
 318 #ifdef C_MULTISCAN_FILES_SUPPORTED
 319       if (++argn >= argc)       /* advance to next argument */
 320         usage();
 321       scansarg = argv[argn];
 322       /* We must postpone reading the file in case -progressive appears. */
 323 #else
 324       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
 325               progname);
 326       exit(EXIT_FAILURE);
 327 #endif
 328
 329     } else if (keymatch(arg, "transpose", 1)) {
 330       /* Transpose (across UL-to-LR axis). */
 331       select_transform(JXFORM_TRANSPOSE);
 332
 333     } else if (keymatch(arg, "transverse", 6)) {
 334       /* Transverse transpose (across UR-to-LL axis). */
 335       select_transform(JXFORM_TRANSVERSE);
 336
 337     } else if (keymatch(arg, "trim", 3)) {
 338       /* Trim off any partial edge MCUs that the transform can't handle. */
 339       transformoption.trim = TRUE;
 340
 341     } else if (keymatch(arg, "wipe", 1)) {
 342 #if TRANSFORMS_SUPPORTED
 343       if (++argn >= argc)       /* advance to next argument */
 344         usage();
 345       if (transformoption.crop /* reject multiple crop/wipe requests */ ||
 346           ! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
 347         fprintf(stderr, "%s: bogus -wipe argument '%s'\n",
 348                 progname, argv[argn]);
 349         exit(EXIT_FAILURE);
 350       }
 351       select_transform(JXFORM_WIPE);
 352 #else
 353       select_transform(JXFORM_NONE);    /* force an error */
 354 #endif
 355
 356     } else {
 357       usage();                  /* bogus switch */
 358     }
 359   }
 360
 361   /* Post-switch-scanning cleanup */
 362
 363   if (for_real) {
 364
 365 #ifdef C_PROGRESSIVE_SUPPORTED
 366     if (simple_progressive)     /* process -progressive; -scans can override */
 367       jpeg_simple_progression(cinfo);
 368 #endif
 369
 370 #ifdef C_MULTISCAN_FILES_SUPPORTED
 371     if (scansarg != NULL)       /* process -scans if it was present */
 372       if (! read_scan_script(cinfo, scansarg))
 373         usage();
 374 #endif
 375   }
 376
 377   return argn;                  /* return index of next arg (file name) */
 378 }
 379
 380
 381 /*
 382  * The main program.
 383  */
 384
 385 int
 386 main (int argc, char **argv)
 387 {
 388   struct jpeg_decompress_struct srcinfo;
 389   struct jpeg_compress_struct dstinfo;
 390   struct jpeg_error_mgr jsrcerr, jdsterr;
 391 #ifdef PROGRESS_REPORT
 392   struct cdjpeg_progress_mgr progress;
 393 #endif
 394   jvirt_barray_ptr * src_coef_arrays;
 395   jvirt_barray_ptr * dst_coef_arrays;
 396   int file_index;
 397   /* We assume all-in-memory processing and can therefore use only a
 398    * single file pointer for sequential input and output operation.
 399    */
 400   FILE * fp;
 401
 402   /* On Mac, fetch a command line. */
 403 #ifdef USE_CCOMMAND
 404   argc = ccommand(&argv);
 405 #endif
 406
 407   progname = argv[0];
 408   if (progname == NULL || progname[0] == 0)
 409     progname = "jpegtran";      /* in case C library doesn't provide it */
 410
 411   /* Initialize the JPEG decompression object with default error handling. */
 412   srcinfo.err = jpeg_std_error(&jsrcerr);
 413   jpeg_create_decompress(&srcinfo);
 414   /* Initialize the JPEG compression object with default error handling. */
 415   dstinfo.err = jpeg_std_error(&jdsterr);
 416   jpeg_create_compress(&dstinfo);
 417
 418   /* Now safe to enable signal catcher.
 419    * Note: we assume only the decompression object will have virtual arrays.
 420    */
 421 #ifdef NEED_SIGNAL_CATCHER
 422   enable_signal_catcher((j_common_ptr) &srcinfo);
 423 #endif
 424
 425   /* Scan command line to find file names.
 426    * It is convenient to use just one switch-parsing routine, but the switch
 427    * values read here are mostly ignored; we will rescan the switches after
 428    * opening the input file.  Also note that most of the switches affect the
 429    * destination JPEG object, so we parse into that and then copy over what
 430    * needs to affects the source too.
 431    */
 432
 433   file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
 434   jsrcerr.trace_level = jdsterr.trace_level;
 435   srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
 436
 437 #ifdef TWO_FILE_COMMANDLINE
 438   /* Must have either -outfile switch or explicit output file name */
 439   if (outfilename == NULL) {
 440     if (file_index != argc-2) {
 441       fprintf(stderr, "%s: must name one input and one output file\n",
 442               progname);
 443       usage();
 444     }
 445     outfilename = argv[file_index+1];
 446   } else {
 447     if (file_index != argc-1) {
 448       fprintf(stderr, "%s: must name one input and one output file\n",
 449               progname);
 450       usage();
 451     }
 452   }
 453 #else
 454   /* Unix style: expect zero or one file name */
 455   if (file_index < argc-1) {
 456     fprintf(stderr, "%s: only one input file\n", progname);
 457     usage();
 458   }
 459 #endif /* TWO_FILE_COMMANDLINE */
 460
 461   /* Open the input file. */
 462   if (file_index < argc) {
 463     if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
 464       fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
 465       exit(EXIT_FAILURE);
 466     }
 467   } else {
 468     /* default input file is stdin */
 469     fp = read_stdin();
 470   }
 471
 472 #ifdef PROGRESS_REPORT
 473   start_progress_monitor((j_common_ptr) &dstinfo, &progress);
 474 #endif
 475
 476   /* Specify data source for decompression */
 477   jpeg_stdio_src(&srcinfo, fp);
 478
 479   /* Enable saving of extra markers that we want to copy */
 480   jcopy_markers_setup(&srcinfo, copyoption);
 481
 482   /* Read file header */
 483   (void) jpeg_read_header(&srcinfo, TRUE);
 484
 485   /* Adjust default decompression parameters */
 486   if (scaleoption != NULL)
 487     if (sscanf(scaleoption, "%u/%u",
 488         &srcinfo.scale_num, &srcinfo.scale_denom) < 1)
 489       usage();
 490
 491   /* Any space needed by a transform option must be requested before
 492    * jpeg_read_coefficients so that memory allocation will be done right.
 493    */
 494 #if TRANSFORMS_SUPPORTED
 495   /* Fail right away if -perfect is given and transformation is not perfect.
 496    */
 497   if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
 498     fprintf(stderr, "%s: transformation is not perfect\n", progname);
 499     exit(EXIT_FAILURE);
 500   }
 501 #endif
 502
 503   /* Read source file as DCT coefficients */
 504   src_coef_arrays = jpeg_read_coefficients(&srcinfo);
 505
 506   /* Initialize destination compression parameters from source values */
 507   jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
 508
 509   /* Adjust destination parameters if required by transform options;
 510    * also find out which set of coefficient arrays will hold the output.
 511    */
 512 #if TRANSFORMS_SUPPORTED
 513   dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
 514                                                  src_coef_arrays,
 515                                                  &transformoption);
 516 #else
 517   dst_coef_arrays = src_coef_arrays;
 518 #endif
 519
 520   /* Close input file, if we opened it.
 521    * Note: we assume that jpeg_read_coefficients consumed all input
 522    * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
 523    * only consume more while (! cinfo->inputctl->eoi_reached).
 524    * We cannot call jpeg_finish_decompress here since we still need the
 525    * virtual arrays allocated from the source object for processing.
 526    */
 527   if (fp != stdin)
 528     fclose(fp);
 529
 530   /* Open the output file. */
 531   if (outfilename != NULL) {
 532     if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
 533       fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
 534       exit(EXIT_FAILURE);
 535     }
 536   } else {
 537     /* default output file is stdout */
 538     fp = write_stdout();
 539   }
 540
 541   /* Adjust default compression parameters by re-parsing the options */
 542   file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
 543
 544   /* Specify data destination for compression */
 545   jpeg_stdio_dest(&dstinfo, fp);
 546
 547   /* Start compressor (note no image data is actually written here) */
 548   jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
 549
 550   /* Copy to the output file any extra markers that we want to preserve */
 551   jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
 552
 553   /* Execute image transformation, if any */
 554 #if TRANSFORMS_SUPPORTED
 555   jtransform_execute_transformation(&srcinfo, &dstinfo,
 556                                     src_coef_arrays,
 557                                     &transformoption);
 558 #endif
 559
 560   /* Finish compression and release memory */
 561   jpeg_finish_compress(&dstinfo);
 562   jpeg_destroy_compress(&dstinfo);
 563   (void) jpeg_finish_decompress(&srcinfo);
 564   jpeg_destroy_decompress(&srcinfo);
 565
 566   /* Close output file, if we opened it */
 567   if (fp != stdout)
 568     fclose(fp);
 569
 570 #ifdef PROGRESS_REPORT
 571   end_progress_monitor((j_common_ptr) &dstinfo);
 572 #endif
 573
 574   /* All done. */
 575   exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
 576   return 0;                     /* suppress no-return-value warnings */
 577 }