Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
6417 | ashmew2 | 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 |
||
21 | #include |
||
22 | #endif |
||
23 | #ifdef THINK_C |
||
24 | #include |
||
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 | }>>>>>=>>=> |