4 * This file was part of the Independent JPEG Group's software:
5 * Copyright (C) 1995-2010, Thomas G. Lane, Guido Vollbeding.
6 * libjpeg-turbo Modifications:
7 * Copyright (C) 2010, D. R. Commander.
8 * For conditions of distribution and use, see the accompanying README file.
10 * This file contains a command-line user interface for JPEG transcoding.
11 * It is very similar to cjpeg.c, and partly to djpeg.c, but provides
12 * lossless transcoding between different JPEG file formats. It also
13 * provides some lossless and sort-of-lossless transformations of JPEG data.
16 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
17 #include "transupp.h" /* Support routines for jpegtran */
18 #include "jversion.h" /* for version message */
21 #ifdef USE_CCOMMAND /* command-line reader for Macintosh */
23 #include <SIOUX.h> /* Metrowerks needs this */
24 #include <console.h> /* ... and this */
27 #include <console.h> /* Think declares it here */
33 * Argument-parsing code.
34 * The switch parser is designed to be useful with DOS-style command line
35 * syntax, ie, intermixed switches and file names, where only the switches
36 * to the left of a given file name affect processing of that file.
37 * The main program in this file doesn't actually use this capability...
41 static const char * progname; /* program name for error messages */
42 static char * outfilename; /* for -outfile switch */
43 static JCOPY_OPTION copyoption; /* -copy switch */
44 static jpeg_transform_info transformoption; /* image transformation options */
49 /* complain about bad command line */
51 fprintf(stderr, "usage: %s [switches] ", progname);
52 #ifdef TWO_FILE_COMMANDLINE
53 fprintf(stderr, "inputfile outputfile\n");
55 fprintf(stderr, "[inputfile]\n");
58 fprintf(stderr, "Switches (names may be abbreviated):\n");
59 fprintf(stderr, " -copy none Copy no extra markers from source file\n");
60 fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
61 fprintf(stderr, " -copy all Copy all extra markers\n");
62 #ifdef ENTROPY_OPT_SUPPORTED
63 fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
65 #ifdef C_PROGRESSIVE_SUPPORTED
66 fprintf(stderr, " -progressive Create progressive JPEG file\n");
68 fprintf(stderr, "Switches for modifying the image:\n");
69 #if TRANSFORMS_SUPPORTED
70 fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular subarea\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, " -perfect Fail if there is non-transformable edge blocks\n");
74 fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
76 #if TRANSFORMS_SUPPORTED
77 fprintf(stderr, " -transpose Transpose image\n");
78 fprintf(stderr, " -transverse Transverse transpose image\n");
79 fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
81 fprintf(stderr, "Switches for advanced users:\n");
82 #ifdef C_ARITH_CODING_SUPPORTED
83 fprintf(stderr, " -arithmetic Use arithmetic coding\n");
85 fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
86 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
87 fprintf(stderr, " -outfile name Specify name for output file\n");
88 fprintf(stderr, " -verbose or -debug Emit debug output\n");
89 fprintf(stderr, "Switches for wizards:\n");
90 #ifdef C_MULTISCAN_FILES_SUPPORTED
91 fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
98 select_transform (JXFORM_CODE transform)
99 /* Silly little routine to detect multiple transform options,
100 * which we can't handle.
103 #if TRANSFORMS_SUPPORTED
104 if (transformoption.transform == JXFORM_NONE ||
105 transformoption.transform == transform) {
106 transformoption.transform = transform;
108 fprintf(stderr, "%s: can only do one image transformation at a time\n",
113 fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
121 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
122 int last_file_arg_seen, boolean for_real)
123 /* Parse optional switches.
124 * Returns argv[] index of first file-name argument (== argc if none).
125 * Any file names with indexes <= last_file_arg_seen are ignored;
126 * they have presumably been processed in a previous iteration.
127 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
128 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
134 boolean simple_progressive;
135 char * scansarg = NULL; /* saves -scans parm if any */
137 /* Set up default JPEG parameters. */
138 simple_progressive = FALSE;
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 transformoption.slow_hflip = FALSE;
147 cinfo->err->trace_level = 0;
149 /* Scan command line options, adjust parameters */
151 for (argn = 1; argn < argc; argn++) {
154 /* Not a switch, must be a file name argument */
155 if (argn <= last_file_arg_seen) {
156 outfilename = NULL; /* -outfile applies to just one input file */
157 continue; /* ignore this name if previously processed */
159 break; /* else done parsing switches */
161 arg++; /* advance past switch marker character */
163 if (keymatch(arg, "arithmetic", 1)) {
164 /* Use arithmetic coding. */
165 #ifdef C_ARITH_CODING_SUPPORTED
166 cinfo->arith_code = TRUE;
168 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
173 } else if (keymatch(arg, "copy", 2)) {
174 /* Select which extra markers to copy. */
175 if (++argn >= argc) /* advance to next argument */
177 if (keymatch(argv[argn], "none", 1)) {
178 copyoption = JCOPYOPT_NONE;
179 } else if (keymatch(argv[argn], "comments", 1)) {
180 copyoption = JCOPYOPT_COMMENTS;
181 } else if (keymatch(argv[argn], "all", 1)) {
182 copyoption = JCOPYOPT_ALL;
186 } else if (keymatch(arg, "crop", 2)) {
187 /* Perform lossless cropping. */
188 #if TRANSFORMS_SUPPORTED
189 if (++argn >= argc) /* advance to next argument */
191 if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
192 fprintf(stderr, "%s: bogus -crop argument '%s'\n",
193 progname, argv[argn]);
197 select_transform(JXFORM_NONE); /* force an error */
200 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
201 /* Enable debug printouts. */
202 /* On first -d, print version identification */
203 static boolean printed_version = FALSE;
205 if (! printed_version) {
206 fprintf(stderr, "%s version %s (build %s)\n",
207 PACKAGE_NAME, VERSION, BUILD);
208 fprintf(stderr, "%s\n\n", JCOPYRIGHT);
209 fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
211 printed_version = TRUE;
213 cinfo->err->trace_level++;
215 } else if (keymatch(arg, "flip", 1)) {
216 /* Mirror left-right or top-bottom. */
217 if (++argn >= argc) /* advance to next argument */
219 if (keymatch(argv[argn], "horizontal", 1))
220 select_transform(JXFORM_FLIP_H);
221 else if (keymatch(argv[argn], "vertical", 1))
222 select_transform(JXFORM_FLIP_V);
226 } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
227 /* Force to grayscale. */
228 #if TRANSFORMS_SUPPORTED
229 transformoption.force_grayscale = TRUE;
231 select_transform(JXFORM_NONE); /* force an error */
234 } else if (keymatch(arg, "maxmemory", 3)) {
235 /* Maximum memory in Kb (or Mb with 'm'). */
239 if (++argn >= argc) /* advance to next argument */
241 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
243 if (ch == 'm' || ch == 'M')
245 cinfo->mem->max_memory_to_use = lval * 1000L;
247 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
248 /* Enable entropy parm optimization. */
249 #ifdef ENTROPY_OPT_SUPPORTED
250 cinfo->optimize_coding = TRUE;
252 fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
257 } else if (keymatch(arg, "outfile", 4)) {
258 /* Set output file name. */
259 if (++argn >= argc) /* advance to next argument */
261 outfilename = argv[argn]; /* save it away for later use */
263 } else if (keymatch(arg, "perfect", 2)) {
264 /* Fail if there is any partial edge MCUs that the transform can't
266 transformoption.perfect = TRUE;
268 } else if (keymatch(arg, "progressive", 2)) {
269 /* Select simple progressive mode. */
270 #ifdef C_PROGRESSIVE_SUPPORTED
271 simple_progressive = TRUE;
272 /* We must postpone execution until num_components is known. */
274 fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
279 } else if (keymatch(arg, "restart", 1)) {
280 /* Restart interval in MCU rows (or in MCUs with 'b'). */
284 if (++argn >= argc) /* advance to next argument */
286 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
288 if (lval < 0 || lval > 65535L)
290 if (ch == 'b' || ch == 'B') {
291 cinfo->restart_interval = (unsigned int) lval;
292 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
294 cinfo->restart_in_rows = (int) lval;
295 /* restart_interval will be computed during startup */
298 } else if (keymatch(arg, "rotate", 2)) {
299 /* Rotate 90, 180, or 270 degrees (measured clockwise). */
300 if (++argn >= argc) /* advance to next argument */
302 if (keymatch(argv[argn], "90", 2))
303 select_transform(JXFORM_ROT_90);
304 else if (keymatch(argv[argn], "180", 3))
305 select_transform(JXFORM_ROT_180);
306 else if (keymatch(argv[argn], "270", 3))
307 select_transform(JXFORM_ROT_270);
311 } else if (keymatch(arg, "scans", 1)) {
312 /* Set scan script. */
313 #ifdef C_MULTISCAN_FILES_SUPPORTED
314 if (++argn >= argc) /* advance to next argument */
316 scansarg = argv[argn];
317 /* We must postpone reading the file in case -progressive appears. */
319 fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
324 } else if (keymatch(arg, "transpose", 1)) {
325 /* Transpose (across UL-to-LR axis). */
326 select_transform(JXFORM_TRANSPOSE);
328 } else if (keymatch(arg, "transverse", 6)) {
329 /* Transverse transpose (across UR-to-LL axis). */
330 select_transform(JXFORM_TRANSVERSE);
332 } else if (keymatch(arg, "trim", 3)) {
333 /* Trim off any partial edge MCUs that the transform can't handle. */
334 transformoption.trim = TRUE;
337 usage(); /* bogus switch */
341 /* Post-switch-scanning cleanup */
345 #ifdef C_PROGRESSIVE_SUPPORTED
346 if (simple_progressive) /* process -progressive; -scans can override */
347 jpeg_simple_progression(cinfo);
350 #ifdef C_MULTISCAN_FILES_SUPPORTED
351 if (scansarg != NULL) /* process -scans if it was present */
352 if (! read_scan_script(cinfo, scansarg))
357 return argn; /* return index of next arg (file name) */
366 main (int argc, char **argv)
368 struct jpeg_decompress_struct srcinfo;
369 struct jpeg_compress_struct dstinfo;
370 struct jpeg_error_mgr jsrcerr, jdsterr;
371 #ifdef PROGRESS_REPORT
372 struct cdjpeg_progress_mgr progress;
374 jvirt_barray_ptr * src_coef_arrays;
375 jvirt_barray_ptr * dst_coef_arrays;
377 /* We assume all-in-memory processing and can therefore use only a
378 * single file pointer for sequential input and output operation.
382 /* On Mac, fetch a command line. */
384 argc = ccommand(&argv);
388 if (progname == NULL || progname[0] == 0)
389 progname = "jpegtran"; /* in case C library doesn't provide it */
391 /* Initialize the JPEG decompression object with default error handling. */
392 srcinfo.err = jpeg_std_error(&jsrcerr);
393 jpeg_create_decompress(&srcinfo);
394 /* Initialize the JPEG compression object with default error handling. */
395 dstinfo.err = jpeg_std_error(&jdsterr);
396 jpeg_create_compress(&dstinfo);
398 /* Now safe to enable signal catcher.
399 * Note: we assume only the decompression object will have virtual arrays.
401 #ifdef NEED_SIGNAL_CATCHER
402 enable_signal_catcher((j_common_ptr) &srcinfo);
405 /* Scan command line to find file names.
406 * It is convenient to use just one switch-parsing routine, but the switch
407 * values read here are mostly ignored; we will rescan the switches after
408 * opening the input file. Also note that most of the switches affect the
409 * destination JPEG object, so we parse into that and then copy over what
410 * needs to affects the source too.
413 file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
414 jsrcerr.trace_level = jdsterr.trace_level;
415 srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
417 #ifdef TWO_FILE_COMMANDLINE
418 /* Must have either -outfile switch or explicit output file name */
419 if (outfilename == NULL) {
420 if (file_index != argc-2) {
421 fprintf(stderr, "%s: must name one input and one output file\n",
425 outfilename = argv[file_index+1];
427 if (file_index != argc-1) {
428 fprintf(stderr, "%s: must name one input and one output file\n",
434 /* Unix style: expect zero or one file name */
435 if (file_index < argc-1) {
436 fprintf(stderr, "%s: only one input file\n", progname);
439 #endif /* TWO_FILE_COMMANDLINE */
441 /* Open the input file. */
442 if (file_index < argc) {
443 if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
444 fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
448 /* default input file is stdin */
452 #ifdef PROGRESS_REPORT
453 start_progress_monitor((j_common_ptr) &dstinfo, &progress);
456 /* Specify data source for decompression */
457 jpeg_stdio_src(&srcinfo, fp);
459 /* Enable saving of extra markers that we want to copy */
460 jcopy_markers_setup(&srcinfo, copyoption);
462 /* Read file header */
463 (void) jpeg_read_header(&srcinfo, TRUE);
465 /* Any space needed by a transform option must be requested before
466 * jpeg_read_coefficients so that memory allocation will be done right.
468 #if TRANSFORMS_SUPPORTED
469 /* Fail right away if -perfect is given and transformation is not perfect.
471 if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
472 fprintf(stderr, "%s: transformation is not perfect\n", progname);
477 /* Read source file as DCT coefficients */
478 src_coef_arrays = jpeg_read_coefficients(&srcinfo);
480 /* Initialize destination compression parameters from source values */
481 jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
483 /* Adjust destination parameters if required by transform options;
484 * also find out which set of coefficient arrays will hold the output.
486 #if TRANSFORMS_SUPPORTED
487 dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
491 dst_coef_arrays = src_coef_arrays;
494 /* Close input file, if we opened it.
495 * Note: we assume that jpeg_read_coefficients consumed all input
496 * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
497 * only consume more while (! cinfo->inputctl->eoi_reached).
498 * We cannot call jpeg_finish_decompress here since we still need the
499 * virtual arrays allocated from the source object for processing.
504 /* Open the output file. */
505 if (outfilename != NULL) {
506 if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
507 fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
511 /* default output file is stdout */
515 /* Adjust default compression parameters by re-parsing the options */
516 file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
518 /* Specify data destination for compression */
519 jpeg_stdio_dest(&dstinfo, fp);
521 /* Start compressor (note no image data is actually written here) */
522 jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
524 /* Copy to the output file any extra markers that we want to preserve */
525 jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
527 /* Execute image transformation, if any */
528 #if TRANSFORMS_SUPPORTED
529 jtransform_execute_transformation(&srcinfo, &dstinfo,
534 /* Finish compression and release memory */
535 jpeg_finish_compress(&dstinfo);
536 jpeg_destroy_compress(&dstinfo);
537 (void) jpeg_finish_decompress(&srcinfo);
538 jpeg_destroy_decompress(&srcinfo);
540 /* Close output file, if we opened it */
544 #ifdef PROGRESS_REPORT
545 end_progress_monitor((j_common_ptr) &dstinfo);
549 exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
550 return 0; /* suppress no-return-value warnings */