[LIBJPEG]
[reactos.git] / reactos / dll / 3rdparty / libjpeg / djpeg.c
1 /*
2 * djpeg.c
3 *
4 * Copyright (C) 1991-1997, Thomas G. Lane.
5 * Modified 2009-2015 by Guido Vollbeding.
6 * This file is part of the Independent JPEG Group's software.
7 * For conditions of distribution and use, see the accompanying README file.
8 *
9 * This file contains a command-line user interface for the JPEG decompressor.
10 * It should work on any system with Unix- or MS-DOS-style command lines.
11 *
12 * Two different command line styles are permitted, depending on the
13 * compile-time switch TWO_FILE_COMMANDLINE:
14 * djpeg [options] inputfile outputfile
15 * djpeg [options] [inputfile]
16 * In the second style, output is always to standard output, which you'd
17 * normally redirect to a file or pipe to some other program. Input is
18 * either from a named file or from standard input (typically redirected).
19 * The second style is convenient on Unix but is unhelpful on systems that
20 * don't support pipes. Also, you MUST use the first style if your system
21 * doesn't do binary I/O to stdin/stdout.
22 * To simplify script writing, the "-outfile" switch is provided. The syntax
23 * djpeg [options] -outfile outputfile inputfile
24 * works regardless of which command line style is used.
25 */
26
27 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
28 #include "jversion.h" /* for version message */
29
30 #include <ctype.h> /* to declare isprint() */
31
32 #ifdef USE_CCOMMAND /* command-line reader for Macintosh */
33 #ifdef __MWERKS__
34 #include <SIOUX.h> /* Metrowerks needs this */
35 #include <console.h> /* ... and this */
36 #endif
37 #ifdef THINK_C
38 #include <console.h> /* Think declares it here */
39 #endif
40 #endif
41
42
43 /* Create the add-on message string table. */
44
45 #define JMESSAGE(code,string) string ,
46
47 static const char * const cdjpeg_message_table[] = {
48 #include "cderror.h"
49 NULL
50 };
51
52
53 /*
54 * This list defines the known output image formats
55 * (not all of which need be supported by a given version).
56 * You can change the default output format by defining DEFAULT_FMT;
57 * indeed, you had better do so if you undefine PPM_SUPPORTED.
58 */
59
60 typedef enum {
61 FMT_BMP, /* BMP format (Windows flavor) */
62 FMT_GIF, /* GIF format */
63 FMT_OS2, /* BMP format (OS/2 flavor) */
64 FMT_PPM, /* PPM/PGM (PBMPLUS formats) */
65 FMT_RLE, /* RLE format */
66 FMT_TARGA, /* Targa format */
67 FMT_TIFF /* TIFF format */
68 } IMAGE_FORMATS;
69
70 #ifndef DEFAULT_FMT /* so can override from CFLAGS in Makefile */
71 #define DEFAULT_FMT FMT_PPM
72 #endif
73
74 static IMAGE_FORMATS requested_fmt;
75
76
77 /*
78 * Argument-parsing code.
79 * The switch parser is designed to be useful with DOS-style command line
80 * syntax, ie, intermixed switches and file names, where only the switches
81 * to the left of a given file name affect processing of that file.
82 * The main program in this file doesn't actually use this capability...
83 */
84
85
86 static const char * progname; /* program name for error messages */
87 static char * outfilename; /* for -outfile switch */
88
89
90 LOCAL(void)
91 usage (void)
92 /* complain about bad command line */
93 {
94 fprintf(stderr, "usage: %s [switches] ", progname);
95 #ifdef TWO_FILE_COMMANDLINE
96 fprintf(stderr, "inputfile outputfile\n");
97 #else
98 fprintf(stderr, "[inputfile]\n");
99 #endif
100
101 fprintf(stderr, "Switches (names may be abbreviated):\n");
102 fprintf(stderr, " -colors N Reduce image to no more than N colors\n");
103 fprintf(stderr, " -fast Fast, low-quality processing\n");
104 fprintf(stderr, " -grayscale Force grayscale output\n");
105 fprintf(stderr, " -rgb Force RGB output\n");
106 #ifdef IDCT_SCALING_SUPPORTED
107 fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
108 #endif
109 #ifdef BMP_SUPPORTED
110 fprintf(stderr, " -bmp Select BMP output format (Windows style)%s\n",
111 (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
112 #endif
113 #ifdef GIF_SUPPORTED
114 fprintf(stderr, " -gif Select GIF output format%s\n",
115 (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
116 #endif
117 #ifdef BMP_SUPPORTED
118 fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\n",
119 (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
120 #endif
121 #ifdef PPM_SUPPORTED
122 fprintf(stderr, " -pnm Select PBMPLUS (PPM/PGM) output format%s\n",
123 (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
124 #endif
125 #ifdef RLE_SUPPORTED
126 fprintf(stderr, " -rle Select Utah RLE output format%s\n",
127 (DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
128 #endif
129 #ifdef TARGA_SUPPORTED
130 fprintf(stderr, " -targa Select Targa output format%s\n",
131 (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
132 #endif
133 fprintf(stderr, "Switches for advanced users:\n");
134 #ifdef DCT_ISLOW_SUPPORTED
135 fprintf(stderr, " -dct int Use integer DCT method%s\n",
136 (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
137 #endif
138 #ifdef DCT_IFAST_SUPPORTED
139 fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
140 (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
141 #endif
142 #ifdef DCT_FLOAT_SUPPORTED
143 fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
144 (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
145 #endif
146 fprintf(stderr, " -dither fs Use F-S dithering (default)\n");
147 fprintf(stderr, " -dither none Don't use dithering in quantization\n");
148 fprintf(stderr, " -dither ordered Use ordered dither (medium speed, quality)\n");
149 #ifdef QUANT_2PASS_SUPPORTED
150 fprintf(stderr, " -map FILE Map to colors used in named image file\n");
151 #endif
152 fprintf(stderr, " -nosmooth Don't use high-quality upsampling\n");
153 #ifdef QUANT_1PASS_SUPPORTED
154 fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\n");
155 #endif
156 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
157 fprintf(stderr, " -outfile name Specify name for output file\n");
158 fprintf(stderr, " -verbose or -debug Emit debug output\n");
159 exit(EXIT_FAILURE);
160 }
161
162
163 LOCAL(int)
164 parse_switches (j_decompress_ptr cinfo, int argc, char **argv,
165 int last_file_arg_seen, boolean for_real)
166 /* Parse optional switches.
167 * Returns argv[] index of first file-name argument (== argc if none).
168 * Any file names with indexes <= last_file_arg_seen are ignored;
169 * they have presumably been processed in a previous iteration.
170 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
171 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
172 * processing.
173 */
174 {
175 int argn;
176 char * arg;
177
178 /* Set up default JPEG parameters. */
179 requested_fmt = DEFAULT_FMT; /* set default output file format */
180 outfilename = NULL;
181 cinfo->err->trace_level = 0;
182
183 /* Scan command line options, adjust parameters */
184
185 for (argn = 1; argn < argc; argn++) {
186 arg = argv[argn];
187 if (*arg != '-') {
188 /* Not a switch, must be a file name argument */
189 if (argn <= last_file_arg_seen) {
190 outfilename = NULL; /* -outfile applies to just one input file */
191 continue; /* ignore this name if previously processed */
192 }
193 break; /* else done parsing switches */
194 }
195 arg++; /* advance past switch marker character */
196
197 if (keymatch(arg, "bmp", 1)) {
198 /* BMP output format. */
199 requested_fmt = FMT_BMP;
200
201 } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
202 keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
203 /* Do color quantization. */
204 int val;
205
206 if (++argn >= argc) /* advance to next argument */
207 usage();
208 if (sscanf(argv[argn], "%d", &val) != 1)
209 usage();
210 cinfo->desired_number_of_colors = val;
211 cinfo->quantize_colors = TRUE;
212
213 } else if (keymatch(arg, "dct", 2)) {
214 /* Select IDCT algorithm. */
215 if (++argn >= argc) /* advance to next argument */
216 usage();
217 if (keymatch(argv[argn], "int", 1)) {
218 cinfo->dct_method = JDCT_ISLOW;
219 } else if (keymatch(argv[argn], "fast", 2)) {
220 cinfo->dct_method = JDCT_IFAST;
221 } else if (keymatch(argv[argn], "float", 2)) {
222 cinfo->dct_method = JDCT_FLOAT;
223 } else
224 usage();
225
226 } else if (keymatch(arg, "dither", 2)) {
227 /* Select dithering algorithm. */
228 if (++argn >= argc) /* advance to next argument */
229 usage();
230 if (keymatch(argv[argn], "fs", 2)) {
231 cinfo->dither_mode = JDITHER_FS;
232 } else if (keymatch(argv[argn], "none", 2)) {
233 cinfo->dither_mode = JDITHER_NONE;
234 } else if (keymatch(argv[argn], "ordered", 2)) {
235 cinfo->dither_mode = JDITHER_ORDERED;
236 } else
237 usage();
238
239 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
240 /* Enable debug printouts. */
241 /* On first -d, print version identification */
242 static boolean printed_version = FALSE;
243
244 if (! printed_version) {
245 fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
246 JVERSION, JCOPYRIGHT);
247 printed_version = TRUE;
248 }
249 cinfo->err->trace_level++;
250
251 } else if (keymatch(arg, "fast", 1)) {
252 /* Select recommended processing options for quick-and-dirty output. */
253 cinfo->two_pass_quantize = FALSE;
254 cinfo->dither_mode = JDITHER_ORDERED;
255 if (! cinfo->quantize_colors) /* don't override an earlier -colors */
256 cinfo->desired_number_of_colors = 216;
257 cinfo->dct_method = JDCT_FASTEST;
258 cinfo->do_fancy_upsampling = FALSE;
259
260 } else if (keymatch(arg, "gif", 1)) {
261 /* GIF output format. */
262 requested_fmt = FMT_GIF;
263
264 } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
265 /* Force monochrome output. */
266 cinfo->out_color_space = JCS_GRAYSCALE;
267
268 } else if (keymatch(arg, "rgb", 3)) {
269 /* Force RGB output. */
270 cinfo->out_color_space = JCS_RGB;
271
272 } else if (keymatch(arg, "map", 3)) {
273 /* Quantize to a color map taken from an input file. */
274 if (++argn >= argc) /* advance to next argument */
275 usage();
276 if (for_real) { /* too expensive to do twice! */
277 #ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
278 FILE * mapfile;
279
280 if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
281 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
282 exit(EXIT_FAILURE);
283 }
284 read_color_map(cinfo, mapfile);
285 fclose(mapfile);
286 cinfo->quantize_colors = TRUE;
287 #else
288 ERREXIT(cinfo, JERR_NOT_COMPILED);
289 #endif
290 }
291
292 } else if (keymatch(arg, "maxmemory", 3)) {
293 /* Maximum memory in Kb (or Mb with 'm'). */
294 long lval;
295 char ch = 'x';
296
297 if (++argn >= argc) /* advance to next argument */
298 usage();
299 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
300 usage();
301 if (ch == 'm' || ch == 'M')
302 lval *= 1000L;
303 cinfo->mem->max_memory_to_use = lval * 1000L;
304
305 } else if (keymatch(arg, "nosmooth", 3)) {
306 /* Suppress fancy upsampling. */
307 cinfo->do_fancy_upsampling = FALSE;
308
309 } else if (keymatch(arg, "onepass", 3)) {
310 /* Use fast one-pass quantization. */
311 cinfo->two_pass_quantize = FALSE;
312
313 } else if (keymatch(arg, "os2", 3)) {
314 /* BMP output format (OS/2 flavor). */
315 requested_fmt = FMT_OS2;
316
317 } else if (keymatch(arg, "outfile", 4)) {
318 /* Set output file name. */
319 if (++argn >= argc) /* advance to next argument */
320 usage();
321 outfilename = argv[argn]; /* save it away for later use */
322
323 } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
324 /* PPM/PGM output format. */
325 requested_fmt = FMT_PPM;
326
327 } else if (keymatch(arg, "rle", 1)) {
328 /* RLE output format. */
329 requested_fmt = FMT_RLE;
330
331 } else if (keymatch(arg, "scale", 1)) {
332 /* Scale the output image by a fraction M/N. */
333 if (++argn >= argc) /* advance to next argument */
334 usage();
335 if (sscanf(argv[argn], "%u/%u",
336 &cinfo->scale_num, &cinfo->scale_denom) < 1)
337 usage();
338
339 } else if (keymatch(arg, "targa", 1)) {
340 /* Targa output format. */
341 requested_fmt = FMT_TARGA;
342
343 } else {
344 usage(); /* bogus switch */
345 }
346 }
347
348 return argn; /* return index of next arg (file name) */
349 }
350
351
352 /*
353 * Marker processor for COM and interesting APPn markers.
354 * This replaces the library's built-in processor, which just skips the marker.
355 * We want to print out the marker as text, to the extent possible.
356 * Note this code relies on a non-suspending data source.
357 */
358
359 LOCAL(unsigned int)
360 jpeg_getc (j_decompress_ptr cinfo)
361 /* Read next byte */
362 {
363 struct jpeg_source_mgr * datasrc = cinfo->src;
364
365 if (datasrc->bytes_in_buffer == 0) {
366 if (! (*datasrc->fill_input_buffer) (cinfo))
367 ERREXIT(cinfo, JERR_CANT_SUSPEND);
368 }
369 datasrc->bytes_in_buffer--;
370 return GETJOCTET(*datasrc->next_input_byte++);
371 }
372
373
374 METHODDEF(boolean)
375 print_text_marker (j_decompress_ptr cinfo)
376 {
377 boolean traceit = (cinfo->err->trace_level >= 1);
378 INT32 length;
379 unsigned int ch;
380 unsigned int lastch = 0;
381
382 length = jpeg_getc(cinfo) << 8;
383 length += jpeg_getc(cinfo);
384 length -= 2; /* discount the length word itself */
385
386 if (traceit) {
387 if (cinfo->unread_marker == JPEG_COM)
388 fprintf(stderr, "Comment, length %ld:\n", (long) length);
389 else /* assume it is an APPn otherwise */
390 fprintf(stderr, "APP%d, length %ld:\n",
391 cinfo->unread_marker - JPEG_APP0, (long) length);
392 }
393
394 while (--length >= 0) {
395 ch = jpeg_getc(cinfo);
396 if (traceit) {
397 /* Emit the character in a readable form.
398 * Nonprintables are converted to \nnn form,
399 * while \ is converted to \\.
400 * Newlines in CR, CR/LF, or LF form will be printed as one newline.
401 */
402 if (ch == '\r') {
403 fprintf(stderr, "\n");
404 } else if (ch == '\n') {
405 if (lastch != '\r')
406 fprintf(stderr, "\n");
407 } else if (ch == '\\') {
408 fprintf(stderr, "\\\\");
409 } else if (isprint(ch)) {
410 putc(ch, stderr);
411 } else {
412 fprintf(stderr, "\\%03o", ch);
413 }
414 lastch = ch;
415 }
416 }
417
418 if (traceit)
419 fprintf(stderr, "\n");
420
421 return TRUE;
422 }
423
424
425 /*
426 * The main program.
427 */
428
429 int
430 main (int argc, char **argv)
431 {
432 struct jpeg_decompress_struct cinfo;
433 struct jpeg_error_mgr jerr;
434 #ifdef PROGRESS_REPORT
435 struct cdjpeg_progress_mgr progress;
436 #endif
437 int file_index;
438 djpeg_dest_ptr dest_mgr = NULL;
439 FILE * input_file;
440 FILE * output_file;
441 JDIMENSION num_scanlines;
442
443 /* On Mac, fetch a command line. */
444 #ifdef USE_CCOMMAND
445 argc = ccommand(&argv);
446 #endif
447
448 progname = argv[0];
449 if (progname == NULL || progname[0] == 0)
450 progname = "djpeg"; /* in case C library doesn't provide it */
451
452 /* Initialize the JPEG decompression object with default error handling. */
453 cinfo.err = jpeg_std_error(&jerr);
454 jpeg_create_decompress(&cinfo);
455 /* Add some application-specific error messages (from cderror.h) */
456 jerr.addon_message_table = cdjpeg_message_table;
457 jerr.first_addon_message = JMSG_FIRSTADDONCODE;
458 jerr.last_addon_message = JMSG_LASTADDONCODE;
459
460 /* Insert custom marker processor for COM and APP12.
461 * APP12 is used by some digital camera makers for textual info,
462 * so we provide the ability to display it as text.
463 * If you like, additional APPn marker types can be selected for display,
464 * but don't try to override APP0 or APP14 this way (see libjpeg.doc).
465 */
466 jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
467 jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
468
469 /* Now safe to enable signal catcher. */
470 #ifdef NEED_SIGNAL_CATCHER
471 enable_signal_catcher((j_common_ptr) &cinfo);
472 #endif
473
474 /* Scan command line to find file names. */
475 /* It is convenient to use just one switch-parsing routine, but the switch
476 * values read here are ignored; we will rescan the switches after opening
477 * the input file.
478 * (Exception: tracing level set here controls verbosity for COM markers
479 * found during jpeg_read_header...)
480 */
481
482 file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
483
484 #ifdef TWO_FILE_COMMANDLINE
485 /* Must have either -outfile switch or explicit output file name */
486 if (outfilename == NULL) {
487 if (file_index != argc-2) {
488 fprintf(stderr, "%s: must name one input and one output file\n",
489 progname);
490 usage();
491 }
492 outfilename = argv[file_index+1];
493 } else {
494 if (file_index != argc-1) {
495 fprintf(stderr, "%s: must name one input and one output file\n",
496 progname);
497 usage();
498 }
499 }
500 #else
501 /* Unix style: expect zero or one file name */
502 if (file_index < argc-1) {
503 fprintf(stderr, "%s: only one input file\n", progname);
504 usage();
505 }
506 #endif /* TWO_FILE_COMMANDLINE */
507
508 /* Open the input file. */
509 if (file_index < argc) {
510 if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
511 fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
512 exit(EXIT_FAILURE);
513 }
514 } else {
515 /* default input file is stdin */
516 input_file = read_stdin();
517 }
518
519 /* Open the output file. */
520 if (outfilename != NULL) {
521 if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
522 fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
523 exit(EXIT_FAILURE);
524 }
525 } else {
526 /* default output file is stdout */
527 output_file = write_stdout();
528 }
529
530 #ifdef PROGRESS_REPORT
531 start_progress_monitor((j_common_ptr) &cinfo, &progress);
532 #endif
533
534 /* Specify data source for decompression */
535 jpeg_stdio_src(&cinfo, input_file);
536
537 /* Read file header, set default decompression parameters */
538 (void) jpeg_read_header(&cinfo, TRUE);
539
540 /* Adjust default decompression parameters by re-parsing the options */
541 file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
542
543 /* Initialize the output module now to let it override any crucial
544 * option settings (for instance, GIF wants to force color quantization).
545 */
546 switch (requested_fmt) {
547 #ifdef BMP_SUPPORTED
548 case FMT_BMP:
549 dest_mgr = jinit_write_bmp(&cinfo, FALSE);
550 break;
551 case FMT_OS2:
552 dest_mgr = jinit_write_bmp(&cinfo, TRUE);
553 break;
554 #endif
555 #ifdef GIF_SUPPORTED
556 case FMT_GIF:
557 dest_mgr = jinit_write_gif(&cinfo);
558 break;
559 #endif
560 #ifdef PPM_SUPPORTED
561 case FMT_PPM:
562 dest_mgr = jinit_write_ppm(&cinfo);
563 break;
564 #endif
565 #ifdef RLE_SUPPORTED
566 case FMT_RLE:
567 dest_mgr = jinit_write_rle(&cinfo);
568 break;
569 #endif
570 #ifdef TARGA_SUPPORTED
571 case FMT_TARGA:
572 dest_mgr = jinit_write_targa(&cinfo);
573 break;
574 #endif
575 default:
576 ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
577 break;
578 }
579 dest_mgr->output_file = output_file;
580
581 /* Start decompressor */
582 (void) jpeg_start_decompress(&cinfo);
583
584 /* Write output file header */
585 (*dest_mgr->start_output) (&cinfo, dest_mgr);
586
587 /* Process data */
588 while (cinfo.output_scanline < cinfo.output_height) {
589 num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
590 dest_mgr->buffer_height);
591 (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
592 }
593
594 #ifdef PROGRESS_REPORT
595 /* Hack: count final pass as done in case finish_output does an extra pass.
596 * The library won't have updated completed_passes.
597 */
598 progress.pub.completed_passes = progress.pub.total_passes;
599 #endif
600
601 /* Finish decompression and release memory.
602 * I must do it in this order because output module has allocated memory
603 * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
604 */
605 (*dest_mgr->finish_output) (&cinfo, dest_mgr);
606 (void) jpeg_finish_decompress(&cinfo);
607 jpeg_destroy_decompress(&cinfo);
608
609 /* Close files, if we opened them */
610 if (input_file != stdin)
611 fclose(input_file);
612 if (output_file != stdout)
613 fclose(output_file);
614
615 #ifdef PROGRESS_REPORT
616 end_progress_monitor((j_common_ptr) &cinfo);
617 #endif
618
619 /* All done. */
620 exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
621 return 0; /* suppress no-return-value warnings */
622 }