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