reactos/dll/3rdparty/libjpeg/jpegtran.c

   1 /*
   2  * jpegtran.c
   3  *
   4  * Copyright (C) 1995-2010, 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, "  -grayscale     Reduce to grayscale (omit color data)\n");
  70   fprintf(stderr, "  -flip [horizontal|vertical]  Mirror image (left-right or top-bottom)\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 #endif
  80   fprintf(stderr, "Switches for advanced users:\n");
  81   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
  82   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
  83   fprintf(stderr, "  -outfile name  Specify name for output file\n");
  84   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
  85   fprintf(stderr, "Switches for wizards:\n");
  86 #ifdef C_ARITH_CODING_SUPPORTED
  87   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
  88 #endif
  89 #ifdef C_MULTISCAN_FILES_SUPPORTED
  90   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
  91 #endif
  92   exit(EXIT_FAILURE);
  93 }
  94
  95
  96 LOCAL(void)
  97 select_transform (JXFORM_CODE transform)
  98 /* Silly little routine to detect multiple transform options,
  99  * which we can't handle.
 100  */
 101 {
 102 #if TRANSFORMS_SUPPORTED
 103   if (transformoption.transform == JXFORM_NONE ||
 104       transformoption.transform == transform) {
 105     transformoption.transform = transform;
 106   } else {
 107     fprintf(stderr, "%s: can only do one image transformation at a time\n",
 108             progname);
 109     usage();
 110   }
 111 #else
 112   fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
 113           progname);
 114   exit(EXIT_FAILURE);
 115 #endif
 116 }
 117
 118
 119 LOCAL(int)
 120 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 121                 int last_file_arg_seen, boolean for_real)
 122 /* Parse optional switches.
 123  * Returns argv[] index of first file-name argument (== argc if none).
 124  * Any file names with indexes <= last_file_arg_seen are ignored;
 125  * they have presumably been processed in a previous iteration.
 126  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
 127  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
 128  * processing.
 129  */
 130 {
 131   int argn;
 132   char * arg;
 133   boolean simple_progressive;
 134   char * scansarg = NULL;       /* saves -scans parm if any */
 135
 136   /* Set up default JPEG parameters. */
 137   simple_progressive = FALSE;
 138   outfilename = NULL;
 139   scaleoption = NULL;
 140   copyoption = JCOPYOPT_DEFAULT;
 141   transformoption.transform = JXFORM_NONE;
 142   transformoption.perfect = FALSE;
 143   transformoption.trim = FALSE;
 144   transformoption.force_grayscale = FALSE;
 145   transformoption.crop = FALSE;
 146   cinfo->err->trace_level = 0;
 147
 148   /* Scan command line options, adjust parameters */
 149
 150   for (argn = 1; argn < argc; argn++) {
 151     arg = argv[argn];
 152     if (*arg != '-') {
 153       /* Not a switch, must be a file name argument */
 154       if (argn <= last_file_arg_seen) {
 155         outfilename = NULL;     /* -outfile applies to just one input file */
 156         continue;               /* ignore this name if previously processed */
 157       }
 158       break;                    /* else done parsing switches */
 159     }
 160     arg++;                      /* advance past switch marker character */
 161
 162     if (keymatch(arg, "arithmetic", 1)) {
 163       /* Use arithmetic coding. */
 164 #ifdef C_ARITH_CODING_SUPPORTED
 165       cinfo->arith_code = TRUE;
 166 #else
 167       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
 168               progname);
 169       exit(EXIT_FAILURE);
 170 #endif
 171
 172     } else if (keymatch(arg, "copy", 2)) {
 173       /* Select which extra markers to copy. */
 174       if (++argn >= argc)       /* advance to next argument */
 175         usage();
 176       if (keymatch(argv[argn], "none", 1)) {
 177         copyoption = JCOPYOPT_NONE;
 178       } else if (keymatch(argv[argn], "comments", 1)) {
 179         copyoption = JCOPYOPT_COMMENTS;
 180       } else if (keymatch(argv[argn], "all", 1)) {
 181         copyoption = JCOPYOPT_ALL;
 182       } else
 183         usage();
 184
 185     } else if (keymatch(arg, "crop", 2)) {
 186       /* Perform lossless cropping. */
 187 #if TRANSFORMS_SUPPORTED
 188       if (++argn >= argc)       /* advance to next argument */
 189         usage();
 190       if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
 191         fprintf(stderr, "%s: bogus -crop argument '%s'\n",
 192                 progname, argv[argn]);
 193         exit(EXIT_FAILURE);
 194       }
 195 #else
 196       select_transform(JXFORM_NONE);    /* force an error */
 197 #endif
 198
 199     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
 200       /* Enable debug printouts. */
 201       /* On first -d, print version identification */
 202       static boolean printed_version = FALSE;
 203
 204       if (! printed_version) {
 205         fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
 206                 JVERSION, JCOPYRIGHT);
 207         printed_version = TRUE;
 208       }
 209       cinfo->err->trace_level++;
 210
 211     } else if (keymatch(arg, "flip", 1)) {
 212       /* Mirror left-right or top-bottom. */
 213       if (++argn >= argc)       /* advance to next argument */
 214         usage();
 215       if (keymatch(argv[argn], "horizontal", 1))
 216         select_transform(JXFORM_FLIP_H);
 217       else if (keymatch(argv[argn], "vertical", 1))
 218         select_transform(JXFORM_FLIP_V);
 219       else
 220         usage();
 221
 222     } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
 223       /* Force to grayscale. */
 224 #if TRANSFORMS_SUPPORTED
 225       transformoption.force_grayscale = TRUE;
 226 #else
 227       select_transform(JXFORM_NONE);    /* force an error */
 228 #endif
 229
 230     } else if (keymatch(arg, "maxmemory", 3)) {
 231       /* Maximum memory in Kb (or Mb with 'm'). */
 232       long lval;
 233       char ch = 'x';
 234
 235       if (++argn >= argc)       /* advance to next argument */
 236         usage();
 237       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 238         usage();
 239       if (ch == 'm' || ch == 'M')
 240         lval *= 1000L;
 241       cinfo->mem->max_memory_to_use = lval * 1000L;
 242
 243     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
 244       /* Enable entropy parm optimization. */
 245 #ifdef ENTROPY_OPT_SUPPORTED
 246       cinfo->optimize_coding = TRUE;
 247 #else
 248       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
 249               progname);
 250       exit(EXIT_FAILURE);
 251 #endif
 252
 253     } else if (keymatch(arg, "outfile", 4)) {
 254       /* Set output file name. */
 255       if (++argn >= argc)       /* advance to next argument */
 256         usage();
 257       outfilename = argv[argn]; /* save it away for later use */
 258
 259     } else if (keymatch(arg, "perfect", 2)) {
 260       /* Fail if there is any partial edge MCUs that the transform can't
 261        * handle. */
 262       transformoption.perfect = TRUE;
 263
 264     } else if (keymatch(arg, "progressive", 2)) {
 265       /* Select simple progressive mode. */
 266 #ifdef C_PROGRESSIVE_SUPPORTED
 267       simple_progressive = TRUE;
 268       /* We must postpone execution until num_components is known. */
 269 #else
 270       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
 271               progname);
 272       exit(EXIT_FAILURE);
 273 #endif
 274
 275     } else if (keymatch(arg, "restart", 1)) {
 276       /* Restart interval in MCU rows (or in MCUs with 'b'). */
 277       long lval;
 278       char ch = 'x';
 279
 280       if (++argn >= argc)       /* advance to next argument */
 281         usage();
 282       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 283         usage();
 284       if (lval < 0 || lval > 65535L)
 285         usage();
 286       if (ch == 'b' || ch == 'B') {
 287         cinfo->restart_interval = (unsigned int) lval;
 288         cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
 289       } else {
 290         cinfo->restart_in_rows = (int) lval;
 291         /* restart_interval will be computed during startup */
 292       }
 293
 294     } else if (keymatch(arg, "rotate", 2)) {
 295       /* Rotate 90, 180, or 270 degrees (measured clockwise). */
 296       if (++argn >= argc)       /* advance to next argument */
 297         usage();
 298       if (keymatch(argv[argn], "90", 2))
 299         select_transform(JXFORM_ROT_90);
 300       else if (keymatch(argv[argn], "180", 3))
 301         select_transform(JXFORM_ROT_180);
 302       else if (keymatch(argv[argn], "270", 3))
 303         select_transform(JXFORM_ROT_270);
 304       else
 305         usage();
 306
 307     } else if (keymatch(arg, "scale", 4)) {
 308       /* Scale the output image by a fraction M/N. */
 309       if (++argn >= argc)       /* advance to next argument */
 310         usage();
 311       scaleoption = argv[argn];
 312       /* We must postpone processing until decompression startup. */
 313
 314     } else if (keymatch(arg, "scans", 1)) {
 315       /* Set scan script. */
 316 #ifdef C_MULTISCAN_FILES_SUPPORTED
 317       if (++argn >= argc)       /* advance to next argument */
 318         usage();
 319       scansarg = argv[argn];
 320       /* We must postpone reading the file in case -progressive appears. */
 321 #else
 322       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
 323               progname);
 324       exit(EXIT_FAILURE);
 325 #endif
 326
 327     } else if (keymatch(arg, "transpose", 1)) {
 328       /* Transpose (across UL-to-LR axis). */
 329       select_transform(JXFORM_TRANSPOSE);
 330
 331     } else if (keymatch(arg, "transverse", 6)) {
 332       /* Transverse transpose (across UR-to-LL axis). */
 333       select_transform(JXFORM_TRANSVERSE);
 334
 335     } else if (keymatch(arg, "trim", 3)) {
 336       /* Trim off any partial edge MCUs that the transform can't handle. */
 337       transformoption.trim = TRUE;
 338
 339     } else {
 340       usage();                  /* bogus switch */
 341     }
 342   }
 343
 344   /* Post-switch-scanning cleanup */
 345
 346   if (for_real) {
 347
 348 #ifdef C_PROGRESSIVE_SUPPORTED
 349     if (simple_progressive)     /* process -progressive; -scans can override */
 350       jpeg_simple_progression(cinfo);
 351 #endif
 352
 353 #ifdef C_MULTISCAN_FILES_SUPPORTED
 354     if (scansarg != NULL)       /* process -scans if it was present */
 355       if (! read_scan_script(cinfo, scansarg))
 356         usage();
 357 #endif
 358   }
 359
 360   return argn;                  /* return index of next arg (file name) */
 361 }
 362
 363
 364 /*
 365  * The main program.
 366  */
 367
 368 int
 369 main (int argc, char **argv)
 370 {
 371   struct jpeg_decompress_struct srcinfo;
 372   struct jpeg_compress_struct dstinfo;
 373   struct jpeg_error_mgr jsrcerr, jdsterr;
 374 #ifdef PROGRESS_REPORT
 375   struct cdjpeg_progress_mgr progress;
 376 #endif
 377   jvirt_barray_ptr * src_coef_arrays;
 378   jvirt_barray_ptr * dst_coef_arrays;
 379   int file_index;
 380   /* We assume all-in-memory processing and can therefore use only a
 381    * single file pointer for sequential input and output operation.
 382    */
 383   FILE * fp;
 384
 385   /* On Mac, fetch a command line. */
 386 #ifdef USE_CCOMMAND
 387   argc = ccommand(&argv);
 388 #endif
 389
 390   progname = argv[0];
 391   if (progname == NULL || progname[0] == 0)
 392     progname = "jpegtran";      /* in case C library doesn't provide it */
 393
 394   /* Initialize the JPEG decompression object with default error handling. */
 395   srcinfo.err = jpeg_std_error(&jsrcerr);
 396   jpeg_create_decompress(&srcinfo);
 397   /* Initialize the JPEG compression object with default error handling. */
 398   dstinfo.err = jpeg_std_error(&jdsterr);
 399   jpeg_create_compress(&dstinfo);
 400
 401   /* Now safe to enable signal catcher.
 402    * Note: we assume only the decompression object will have virtual arrays.
 403    */
 404 #ifdef NEED_SIGNAL_CATCHER
 405   enable_signal_catcher((j_common_ptr) &srcinfo);
 406 #endif
 407
 408   /* Scan command line to find file names.
 409    * It is convenient to use just one switch-parsing routine, but the switch
 410    * values read here are mostly ignored; we will rescan the switches after
 411    * opening the input file.  Also note that most of the switches affect the
 412    * destination JPEG object, so we parse into that and then copy over what
 413    * needs to affects the source too.
 414    */
 415
 416   file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
 417   jsrcerr.trace_level = jdsterr.trace_level;
 418   srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
 419
 420 #ifdef TWO_FILE_COMMANDLINE
 421   /* Must have either -outfile switch or explicit output file name */
 422   if (outfilename == NULL) {
 423     if (file_index != argc-2) {
 424       fprintf(stderr, "%s: must name one input and one output file\n",
 425               progname);
 426       usage();
 427     }
 428     outfilename = argv[file_index+1];
 429   } else {
 430     if (file_index != argc-1) {
 431       fprintf(stderr, "%s: must name one input and one output file\n",
 432               progname);
 433       usage();
 434     }
 435   }
 436 #else
 437   /* Unix style: expect zero or one file name */
 438   if (file_index < argc-1) {
 439     fprintf(stderr, "%s: only one input file\n", progname);
 440     usage();
 441   }
 442 #endif /* TWO_FILE_COMMANDLINE */
 443
 444   /* Open the input file. */
 445   if (file_index < argc) {
 446     if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
 447       fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
 448       exit(EXIT_FAILURE);
 449     }
 450   } else {
 451     /* default input file is stdin */
 452     fp = read_stdin();
 453   }
 454
 455 #ifdef PROGRESS_REPORT
 456   start_progress_monitor((j_common_ptr) &dstinfo, &progress);
 457 #endif
 458
 459   /* Specify data source for decompression */
 460   jpeg_stdio_src(&srcinfo, fp);
 461
 462   /* Enable saving of extra markers that we want to copy */
 463   jcopy_markers_setup(&srcinfo, copyoption);
 464
 465   /* Read file header */
 466   (void) jpeg_read_header(&srcinfo, TRUE);
 467
 468   /* Adjust default decompression parameters */
 469   if (scaleoption != NULL)
 470     if (sscanf(scaleoption, "%d/%d",
 471         &srcinfo.scale_num, &srcinfo.scale_denom) < 1)
 472       usage();
 473
 474   /* Any space needed by a transform option must be requested before
 475    * jpeg_read_coefficients so that memory allocation will be done right.
 476    */
 477 #if TRANSFORMS_SUPPORTED
 478   /* Fail right away if -perfect is given and transformation is not perfect.
 479    */
 480   if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
 481     fprintf(stderr, "%s: transformation is not perfect\n", progname);
 482     exit(EXIT_FAILURE);
 483   }
 484 #endif
 485
 486   /* Read source file as DCT coefficients */
 487   src_coef_arrays = jpeg_read_coefficients(&srcinfo);
 488
 489   /* Initialize destination compression parameters from source values */
 490   jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
 491
 492   /* Adjust destination parameters if required by transform options;
 493    * also find out which set of coefficient arrays will hold the output.
 494    */
 495 #if TRANSFORMS_SUPPORTED
 496   dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
 497                                                  src_coef_arrays,
 498                                                  &transformoption);
 499 #else
 500   dst_coef_arrays = src_coef_arrays;
 501 #endif
 502
 503   /* Close input file, if we opened it.
 504    * Note: we assume that jpeg_read_coefficients consumed all input
 505    * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
 506    * only consume more while (! cinfo->inputctl->eoi_reached).
 507    * We cannot call jpeg_finish_decompress here since we still need the
 508    * virtual arrays allocated from the source object for processing.
 509    */
 510   if (fp != stdin)
 511     fclose(fp);
 512
 513   /* Open the output file. */
 514   if (outfilename != NULL) {
 515     if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
 516       fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
 517       exit(EXIT_FAILURE);
 518     }
 519   } else {
 520     /* default output file is stdout */
 521     fp = write_stdout();
 522   }
 523
 524   /* Adjust default compression parameters by re-parsing the options */
 525   file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
 526
 527   /* Specify data destination for compression */
 528   jpeg_stdio_dest(&dstinfo, fp);
 529
 530   /* Start compressor (note no image data is actually written here) */
 531   jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
 532
 533   /* Copy to the output file any extra markers that we want to preserve */
 534   jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
 535
 536   /* Execute image transformation, if any */
 537 #if TRANSFORMS_SUPPORTED
 538   jtransform_execute_transformation(&srcinfo, &dstinfo,
 539                                     src_coef_arrays,
 540                                     &transformoption);
 541 #endif
 542
 543   /* Finish compression and release memory */
 544   jpeg_finish_compress(&dstinfo);
 545   jpeg_destroy_compress(&dstinfo);
 546   (void) jpeg_finish_decompress(&srcinfo);
 547   jpeg_destroy_decompress(&srcinfo);
 548
 549   /* Close output file, if we opened it */
 550   if (fp != stdout)
 551     fclose(fp);
 552
 553 #ifdef PROGRESS_REPORT
 554   end_progress_monitor((j_common_ptr) &dstinfo);
 555 #endif
 556
 557   /* All done. */
 558   exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
 559   return 0;                     /* suppress no-return-value warnings */
 560 }