compiler/libjpeg/test/jpegtran.c

   1 /*
   2     $Id$
   3 */
   4
   5 /*
   6  * jpegtran.c
   7  *
   8  * Copyright (C) 1995-1997, Thomas G. Lane.
   9  * This file is part of the Independent JPEG Group's software.
  10  * For conditions of distribution and use, see the accompanying README file.
  11  *
  12  * This file contains a command-line user interface for JPEG transcoding.
  13  * It is very similar to cjpeg.c, but provides lossless transcoding between
  14  * different JPEG file formats.  It also provides some lossless and sort-of-
  15  * lossless transformations of JPEG data.
  16  */
  17
  18 #include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
  19 #include "transupp.h"           /* Support routines for jpegtran */
  20 #include "jversion.h"           /* for version message */
  21
  22 #ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
  23 #ifdef __MWERKS__
  24 #include <SIOUX.h>              /* Metrowerks needs this */
  25 #include <console.h>            /* ... and this */
  26 #endif
  27 #ifdef THINK_C
  28 #include <console.h>            /* Think declares it here */
  29 #endif
  30 #endif
  31
  32
  33 /*
  34  * Argument-parsing code.
  35  * The switch parser is designed to be useful with DOS-style command line
  36  * syntax, ie, intermixed switches and file names, where only the switches
  37  * to the left of a given file name affect processing of that file.
  38  * The main program in this file doesn't actually use this capability...
  39  */
  40
  41
  42 static const char * progname;   /* program name for error messages */
  43 static char * outfilename;      /* for -outfile switch */
  44 static JCOPY_OPTION copyoption; /* -copy switch */
  45 static jpeg_transform_info transformoption; /* image transformation options */
  46
  47
  48 LOCAL(void)
  49 usage (void)
  50 /* complain about bad command line */
  51 {
  52   fprintf(stderr, "usage: %s [switches] ", progname);
  53 #ifdef TWO_FILE_COMMANDLINE
  54   fprintf(stderr, "inputfile outputfile\n");
  55 #else
  56   fprintf(stderr, "[inputfile]\n");
  57 #endif
  58
  59   fprintf(stderr, "Switches (names may be abbreviated):\n");
  60   fprintf(stderr, "  -copy none     Copy no extra markers from source file\n");
  61   fprintf(stderr, "  -copy comments Copy only comment markers (default)\n");
  62   fprintf(stderr, "  -copy all      Copy all extra markers\n");
  63 #ifdef ENTROPY_OPT_SUPPORTED
  64   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");
  65 #endif
  66 #ifdef C_PROGRESSIVE_SUPPORTED
  67   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");
  68 #endif
  69 #if TRANSFORMS_SUPPORTED
  70   fprintf(stderr, "Switches for modifying the image:\n");
  71   fprintf(stderr, "  -grayscale     Reduce to grayscale (omit color data)\n");
  72   fprintf(stderr, "  -flip [horizontal|vertical]  Mirror image (left-right or top-bottom)\n");
  73   fprintf(stderr, "  -rotate [90|180|270]         Rotate image (degrees clockwise)\n");
  74   fprintf(stderr, "  -transpose     Transpose image\n");
  75   fprintf(stderr, "  -transverse    Transverse transpose image\n");
  76   fprintf(stderr, "  -trim          Drop non-transformable edge blocks\n");
  77 #endif /* TRANSFORMS_SUPPORTED */
  78   fprintf(stderr, "Switches for advanced users:\n");
  79   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
  80   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
  81   fprintf(stderr, "  -outfile name  Specify name for output file\n");
  82   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
  83   fprintf(stderr, "Switches for wizards:\n");
  84 #ifdef C_ARITH_CODING_SUPPORTED
  85   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
  86 #endif
  87 #ifdef C_MULTISCAN_FILES_SUPPORTED
  88   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
  89 #endif
  90   exit(EXIT_FAILURE);
  91 }
  92
  93
  94 LOCAL(void)
  95 select_transform (JXFORM_CODE transform)
  96 /* Silly little routine to detect multiple transform options,
  97  * which we can't handle.
  98  */
  99 {
 100 #if TRANSFORMS_SUPPORTED
 101   if (transformoption.transform == JXFORM_NONE ||
 102       transformoption.transform == transform) {
 103     transformoption.transform = transform;
 104   } else {
 105     fprintf(stderr, "%s: can only do one image transformation at a time\n",
 106             progname);
 107     usage();
 108   }
 109 #else
 110   fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
 111           progname);
 112   exit(EXIT_FAILURE);
 113 #endif
 114 }
 115
 116
 117 LOCAL(int)
 118 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 119                 int last_file_arg_seen, boolean for_real)
 120 /* Parse optional switches.
 121  * Returns argv[] index of first file-name argument (== argc if none).
 122  * Any file names with indexes <= last_file_arg_seen are ignored;
 123  * they have presumably been processed in a previous iteration.
 124  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
 125  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
 126  * processing.
 127  */
 128 {
 129   int argn;
 130   char * arg;
 131   boolean simple_progressive;
 132   char * scansarg = NULL;       /* saves -scans parm if any */
 133
 134   /* Set up default JPEG parameters. */
 135   simple_progressive = FALSE;
 136   outfilename = NULL;
 137   copyoption = JCOPYOPT_DEFAULT;
 138   transformoption.transform = JXFORM_NONE;
 139   transformoption.trim = FALSE;
 140   transformoption.force_grayscale = FALSE;
 141   cinfo->err->trace_level = 0;
 142
 143   /* Scan command line options, adjust parameters */
 144
 145   for (argn = 1; argn < argc; argn++) {
 146     arg = argv[argn];
 147     if (*arg != '-') {
 148       /* Not a switch, must be a file name argument */
 149       if (argn <= last_file_arg_seen) {
 150         outfilename = NULL;     /* -outfile applies to just one input file */
 151         continue;               /* ignore this name if previously processed */
 152       }
 153       break;                    /* else done parsing switches */
 154     }
 155     arg++;                      /* advance past switch marker character */
 156
 157     if (keymatch(arg, "arithmetic", 1)) {
 158       /* Use arithmetic coding. */
 159 #ifdef C_ARITH_CODING_SUPPORTED
 160       cinfo->arith_code = TRUE;
 161 #else
 162       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
 163               progname);
 164       exit(EXIT_FAILURE);
 165 #endif
 166
 167     } else if (keymatch(arg, "copy", 1)) {
 168       /* Select which extra markers to copy. */
 169       if (++argn >= argc)       /* advance to next argument */
 170         usage();
 171       if (keymatch(argv[argn], "none", 1)) {
 172         copyoption = JCOPYOPT_NONE;
 173       } else if (keymatch(argv[argn], "comments", 1)) {
 174         copyoption = JCOPYOPT_COMMENTS;
 175       } else if (keymatch(argv[argn], "all", 1)) {
 176         copyoption = JCOPYOPT_ALL;
 177       } else
 178         usage();
 179
 180     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
 181       /* Enable debug printouts. */
 182       /* On first -d, print version identification */
 183       static boolean printed_version = FALSE;
 184
 185       if (! printed_version) {
 186         fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
 187                 JVERSION, JCOPYRIGHT);
 188         printed_version = TRUE;
 189       }
 190       cinfo->err->trace_level++;
 191
 192     } else if (keymatch(arg, "flip", 1)) {
 193       /* Mirror left-right or top-bottom. */
 194       if (++argn >= argc)       /* advance to next argument */
 195         usage();
 196       if (keymatch(argv[argn], "horizontal", 1))
 197         select_transform(JXFORM_FLIP_H);
 198       else if (keymatch(argv[argn], "vertical", 1))
 199         select_transform(JXFORM_FLIP_V);
 200       else
 201         usage();
 202
 203     } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
 204       /* Force to grayscale. */
 205 #if TRANSFORMS_SUPPORTED
 206       transformoption.force_grayscale = TRUE;
 207 #else
 208       select_transform(JXFORM_NONE);    /* force an error */
 209 #endif
 210
 211     } else if (keymatch(arg, "maxmemory", 3)) {
 212       /* Maximum memory in Kb (or Mb with 'm'). */
 213       long lval;
 214       char ch = 'x';
 215
 216       if (++argn >= argc)       /* advance to next argument */
 217         usage();
 218       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 219         usage();
 220       if (ch == 'm' || ch == 'M')
 221         lval *= 1000L;
 222       cinfo->mem->max_memory_to_use = lval * 1000L;
 223
 224     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
 225       /* Enable entropy parm optimization. */
 226 #ifdef ENTROPY_OPT_SUPPORTED
 227       cinfo->optimize_coding = TRUE;
 228 #else
 229       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
 230               progname);
 231       exit(EXIT_FAILURE);
 232 #endif
 233
 234     } else if (keymatch(arg, "outfile", 4)) {
 235       /* Set output file name. */
 236       if (++argn >= argc)       /* advance to next argument */
 237         usage();
 238       outfilename = argv[argn]; /* save it away for later use */
 239
 240     } else if (keymatch(arg, "progressive", 1)) {
 241       /* Select simple progressive mode. */
 242 #ifdef C_PROGRESSIVE_SUPPORTED
 243       simple_progressive = TRUE;
 244       /* We must postpone execution until num_components is known. */
 245 #else
 246       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
 247               progname);
 248       exit(EXIT_FAILURE);
 249 #endif
 250
 251     } else if (keymatch(arg, "restart", 1)) {
 252       /* Restart interval in MCU rows (or in MCUs with 'b'). */
 253       long lval;
 254       char ch = 'x';
 255
 256       if (++argn >= argc)       /* advance to next argument */
 257         usage();
 258       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
 259         usage();
 260       if (lval < 0 || lval > 65535L)
 261         usage();
 262       if (ch == 'b' || ch == 'B') {
 263         cinfo->restart_interval = (unsigned int) lval;
 264         cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
 265       } else {
 266         cinfo->restart_in_rows = (int) lval;
 267         /* restart_interval will be computed during startup */
 268       }
 269
 270     } else if (keymatch(arg, "rotate", 2)) {
 271       /* Rotate 90, 180, or 270 degrees (measured clockwise). */
 272       if (++argn >= argc)       /* advance to next argument */
 273         usage();
 274       if (keymatch(argv[argn], "90", 2))
 275         select_transform(JXFORM_ROT_90);
 276       else if (keymatch(argv[argn], "180", 3))
 277         select_transform(JXFORM_ROT_180);
 278       else if (keymatch(argv[argn], "270", 3))
 279         select_transform(JXFORM_ROT_270);
 280       else
 281         usage();
 282
 283     } else if (keymatch(arg, "scans", 1)) {
 284       /* Set scan script. */
 285 #ifdef C_MULTISCAN_FILES_SUPPORTED
 286       if (++argn >= argc)       /* advance to next argument */
 287         usage();
 288       scansarg = argv[argn];
 289       /* We must postpone reading the file in case -progressive appears. */
 290 #else
 291       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
 292               progname);
 293       exit(EXIT_FAILURE);
 294 #endif
 295
 296     } else if (keymatch(arg, "transpose", 1)) {
 297       /* Transpose (across UL-to-LR axis). */
 298       select_transform(JXFORM_TRANSPOSE);
 299
 300     } else if (keymatch(arg, "transverse", 6)) {
 301       /* Transverse transpose (across UR-to-LL axis). */
 302       select_transform(JXFORM_TRANSVERSE);
 303
 304     } else if (keymatch(arg, "trim", 3)) {
 305       /* Trim off any partial edge MCUs that the transform can't handle. */
 306       transformoption.trim = TRUE;
 307
 308     } else {
 309       usage();                  /* bogus switch */
 310     }
 311   }
 312
 313   /* Post-switch-scanning cleanup */
 314
 315   if (for_real) {
 316
 317 #ifdef C_PROGRESSIVE_SUPPORTED
 318     if (simple_progressive)     /* process -progressive; -scans can override */
 319       jpeg_simple_progression(cinfo);
 320 #endif
 321
 322 #ifdef C_MULTISCAN_FILES_SUPPORTED
 323     if (scansarg != NULL)       /* process -scans if it was present */
 324       if (! read_scan_script(cinfo, scansarg))
 325         usage();
 326 #endif
 327   }
 328
 329   return argn;                  /* return index of next arg (file name) */
 330 }
 331
 332
 333 /*
 334  * The main program.
 335  */
 336
 337 int
 338 main (int argc, char **argv)
 339 {
 340   struct jpeg_decompress_struct srcinfo;
 341   struct jpeg_compress_struct dstinfo;
 342   struct jpeg_error_mgr jsrcerr, jdsterr;
 343 #ifdef PROGRESS_REPORT
 344   struct cdjpeg_progress_mgr progress;
 345 #endif
 346   jvirt_barray_ptr * src_coef_arrays;
 347   jvirt_barray_ptr * dst_coef_arrays;
 348   int file_index;
 349   FILE * input_file;
 350   FILE * output_file;
 351
 352   /* On Mac, fetch a command line. */
 353 #ifdef USE_CCOMMAND
 354   argc = ccommand(&argv);
 355 #endif
 356
 357   progname = argv[0];
 358   if (progname == NULL || progname[0] == 0)
 359     progname = "jpegtran";      /* in case C library doesn't provide it */
 360
 361   /* Initialize the JPEG decompression object with default error handling. */
 362   srcinfo.err = jpeg_std_error(&jsrcerr);
 363   jpeg_create_decompress(&srcinfo);
 364   /* Initialize the JPEG compression object with default error handling. */
 365   dstinfo.err = jpeg_std_error(&jdsterr);
 366   jpeg_create_compress(&dstinfo);
 367
 368   /* Now safe to enable signal catcher.
 369    * Note: we assume only the decompression object will have virtual arrays.
 370    */
 371 #ifdef NEED_SIGNAL_CATCHER
 372   enable_signal_catcher((j_common_ptr) &srcinfo);
 373 #endif
 374
 375   /* Scan command line to find file names.
 376    * It is convenient to use just one switch-parsing routine, but the switch
 377    * values read here are mostly ignored; we will rescan the switches after
 378    * opening the input file.  Also note that most of the switches affect the
 379    * destination JPEG object, so we parse into that and then copy over what
 380    * needs to affects the source too.
 381    */
 382
 383   file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
 384   jsrcerr.trace_level = jdsterr.trace_level;
 385   srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
 386
 387 #ifdef TWO_FILE_COMMANDLINE
 388   /* Must have either -outfile switch or explicit output file name */
 389   if (outfilename == NULL) {
 390     if (file_index != argc-2) {
 391       fprintf(stderr, "%s: must name one input and one output file\n",
 392               progname);
 393       usage();
 394     }
 395     outfilename = argv[file_index+1];
 396   } else {
 397     if (file_index != argc-1) {
 398       fprintf(stderr, "%s: must name one input and one output file\n",
 399               progname);
 400       usage();
 401     }
 402   }
 403 #else
 404   /* Unix style: expect zero or one file name */
 405   if (file_index < argc-1) {
 406     fprintf(stderr, "%s: only one input file\n", progname);
 407     usage();
 408   }
 409 #endif /* TWO_FILE_COMMANDLINE */
 410
 411   /* Open the input file. */
 412   if (file_index < argc) {
 413     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
 414       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
 415       exit(EXIT_FAILURE);
 416     }
 417   } else {
 418     /* default input file is stdin */
 419     input_file = read_stdin();
 420   }
 421
 422   /* Open the output file. */
 423   if (outfilename != NULL) {
 424     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
 425       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
 426       exit(EXIT_FAILURE);
 427     }
 428   } else {
 429     /* default output file is stdout */
 430     output_file = write_stdout();
 431   }
 432
 433 #ifdef PROGRESS_REPORT
 434   start_progress_monitor((j_common_ptr) &dstinfo, &progress);
 435 #endif
 436
 437   /* Specify data source for decompression */
 438   jpeg_stdio_src(&srcinfo, input_file);
 439
 440   /* Enable saving of extra markers that we want to copy */
 441   jcopy_markers_setup(&srcinfo, copyoption);
 442
 443   /* Read file header */
 444   (void) jpeg_read_header(&srcinfo, TRUE);
 445
 446   /* Any space needed by a transform option must be requested before
 447    * jpeg_read_coefficients so that memory allocation will be done right.
 448    */
 449 #if TRANSFORMS_SUPPORTED
 450   jtransform_request_workspace(&srcinfo, &transformoption);
 451 #endif
 452
 453   /* Read source file as DCT coefficients */
 454   src_coef_arrays = jpeg_read_coefficients(&srcinfo);
 455
 456   /* Initialize destination compression parameters from source values */
 457   jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
 458
 459   /* Adjust destination parameters if required by transform options;
 460    * also find out which set of coefficient arrays will hold the output.
 461    */
 462 #if TRANSFORMS_SUPPORTED
 463   dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
 464                                                  src_coef_arrays,
 465                                                  &transformoption);
 466 #else
 467   dst_coef_arrays = src_coef_arrays;
 468 #endif
 469
 470   /* Adjust default compression parameters by re-parsing the options */
 471   file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
 472
 473   /* Specify data destination for compression */
 474   jpeg_stdio_dest(&dstinfo, output_file);
 475
 476   /* Start compressor (note no image data is actually written here) */
 477   jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
 478
 479   /* Copy to the output file any extra markers that we want to preserve */
 480   jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
 481
 482   /* Execute image transformation, if any */
 483 #if TRANSFORMS_SUPPORTED
 484   jtransform_execute_transformation(&srcinfo, &dstinfo,
 485                                     src_coef_arrays,
 486                                     &transformoption);
 487 #endif
 488
 489   /* Finish compression and release memory */
 490   jpeg_finish_compress(&dstinfo);
 491   jpeg_destroy_compress(&dstinfo);
 492   (void) jpeg_finish_decompress(&srcinfo);
 493   jpeg_destroy_decompress(&srcinfo);
 494
 495   /* Close files, if we opened them */
 496   if (input_file != stdin)
 497     fclose(input_file);
 498   if (output_file != stdout)
 499     fclose(output_file);
 500
 501 #ifdef PROGRESS_REPORT
 502   end_progress_monitor((j_common_ptr) &dstinfo);
 503 #endif
 504
 505   /* All done. */
 506   exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
 507   return 0;                     /* suppress no-return-value warnings */
 508 }