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, 2014, 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 */
19 #include "jconfigint.h"
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, " -version Print version information and exit\n");
90 fprintf(stderr, "Switches for wizards:\n");
91 #ifdef C_MULTISCAN_FILES_SUPPORTED
92 fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
99 select_transform (JXFORM_CODE transform)
100 /* Silly little routine to detect multiple transform options,
101 * which we can't handle.
104 #if TRANSFORMS_SUPPORTED
105 if (transformoption.transform == JXFORM_NONE ||
106 transformoption.transform == transform) {
107 transformoption.transform = transform;
109 fprintf(stderr, "%s: can only do one image transformation at a time\n",
114 fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
122 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
123 int last_file_arg_seen, boolean for_real)
124 /* Parse optional switches.
125 * Returns argv[] index of first file-name argument (== argc if none).
126 * Any file names with indexes <= last_file_arg_seen are ignored;
127 * they have presumably been processed in a previous iteration.
128 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
129 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
135 boolean simple_progressive;
136 char * scansarg = NULL; /* saves -scans parm if any */
138 /* Set up default JPEG parameters. */
139 simple_progressive = FALSE;
141 copyoption = JCOPYOPT_DEFAULT;
142 transformoption.transform = JXFORM_NONE;
143 transformoption.perfect = FALSE;
144 transformoption.trim = FALSE;
145 transformoption.force_grayscale = FALSE;
146 transformoption.crop = FALSE;
147 transformoption.slow_hflip = FALSE;
148 cinfo->err->trace_level = 0;
150 /* Scan command line options, adjust parameters */
152 for (argn = 1; argn < argc; argn++) {
155 /* Not a switch, must be a file name argument */
156 if (argn <= last_file_arg_seen) {
157 outfilename = NULL; /* -outfile applies to just one input file */
158 continue; /* ignore this name if previously processed */
160 break; /* else done parsing switches */
162 arg++; /* advance past switch marker character */
164 if (keymatch(arg, "arithmetic", 1)) {
165 /* Use arithmetic coding. */
166 #ifdef C_ARITH_CODING_SUPPORTED
167 cinfo->arith_code = TRUE;
169 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
174 } else if (keymatch(arg, "copy", 2)) {
175 /* Select which extra markers to copy. */
176 if (++argn >= argc) /* advance to next argument */
178 if (keymatch(argv[argn], "none", 1)) {
179 copyoption = JCOPYOPT_NONE;
180 } else if (keymatch(argv[argn], "comments", 1)) {
181 copyoption = JCOPYOPT_COMMENTS;
182 } else if (keymatch(argv[argn], "all", 1)) {
183 copyoption = JCOPYOPT_ALL;
187 } else if (keymatch(arg, "crop", 2)) {
188 /* Perform lossless cropping. */
189 #if TRANSFORMS_SUPPORTED
190 if (++argn >= argc) /* advance to next argument */
192 if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
193 fprintf(stderr, "%s: bogus -crop argument '%s'\n",
194 progname, argv[argn]);
198 select_transform(JXFORM_NONE); /* force an error */
201 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
202 /* Enable debug printouts. */
203 /* On first -d, print version identification */
204 static boolean printed_version = FALSE;
206 if (! printed_version) {
207 fprintf(stderr, "%s version %s (build %s)\n",
208 PACKAGE_NAME, VERSION, BUILD);
209 fprintf(stderr, "%s\n\n", JCOPYRIGHT);
210 fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
212 printed_version = TRUE;
214 cinfo->err->trace_level++;
216 } else if (keymatch(arg, "version", 4)) {
217 fprintf(stderr, "%s version %s (build %s)\n",
218 PACKAGE_NAME, VERSION, BUILD);
221 } else if (keymatch(arg, "flip", 1)) {
222 /* Mirror left-right or top-bottom. */
223 if (++argn >= argc) /* advance to next argument */
225 if (keymatch(argv[argn], "horizontal", 1))
226 select_transform(JXFORM_FLIP_H);
227 else if (keymatch(argv[argn], "vertical", 1))
228 select_transform(JXFORM_FLIP_V);
232 } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
233 /* Force to grayscale. */
234 #if TRANSFORMS_SUPPORTED
235 transformoption.force_grayscale = TRUE;
237 select_transform(JXFORM_NONE); /* force an error */
240 } else if (keymatch(arg, "maxmemory", 3)) {
241 /* Maximum memory in Kb (or Mb with 'm'). */
245 if (++argn >= argc) /* advance to next argument */
247 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
249 if (ch == 'm' || ch == 'M')
251 cinfo->mem->max_memory_to_use = lval * 1000L;
253 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
254 /* Enable entropy parm optimization. */
255 #ifdef ENTROPY_OPT_SUPPORTED
256 cinfo->optimize_coding = TRUE;
258 fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
263 } else if (keymatch(arg, "outfile", 4)) {
264 /* Set output file name. */
265 if (++argn >= argc) /* advance to next argument */
267 outfilename = argv[argn]; /* save it away for later use */
269 } else if (keymatch(arg, "perfect", 2)) {
270 /* Fail if there is any partial edge MCUs that the transform can't
272 transformoption.perfect = TRUE;
274 } else if (keymatch(arg, "progressive", 2)) {
275 /* Select simple progressive mode. */
276 #ifdef C_PROGRESSIVE_SUPPORTED
277 simple_progressive = TRUE;
278 /* We must postpone execution until num_components is known. */
280 fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
285 } else if (keymatch(arg, "restart", 1)) {
286 /* Restart interval in MCU rows (or in MCUs with 'b'). */
290 if (++argn >= argc) /* advance to next argument */
292 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
294 if (lval < 0 || lval > 65535L)
296 if (ch == 'b' || ch == 'B') {
297 cinfo->restart_interval = (unsigned int) lval;
298 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
300 cinfo->restart_in_rows = (int) lval;
301 /* restart_interval will be computed during startup */
304 } else if (keymatch(arg, "rotate", 2)) {
305 /* Rotate 90, 180, or 270 degrees (measured clockwise). */
306 if (++argn >= argc) /* advance to next argument */
308 if (keymatch(argv[argn], "90", 2))
309 select_transform(JXFORM_ROT_90);
310 else if (keymatch(argv[argn], "180", 3))
311 select_transform(JXFORM_ROT_180);
312 else if (keymatch(argv[argn], "270", 3))
313 select_transform(JXFORM_ROT_270);
317 } else if (keymatch(arg, "scans", 1)) {
318 /* Set scan script. */
319 #ifdef C_MULTISCAN_FILES_SUPPORTED
320 if (++argn >= argc) /* advance to next argument */
322 scansarg = argv[argn];
323 /* We must postpone reading the file in case -progressive appears. */
325 fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
330 } else if (keymatch(arg, "transpose", 1)) {
331 /* Transpose (across UL-to-LR axis). */
332 select_transform(JXFORM_TRANSPOSE);
334 } else if (keymatch(arg, "transverse", 6)) {
335 /* Transverse transpose (across UR-to-LL axis). */
336 select_transform(JXFORM_TRANSVERSE);
338 } else if (keymatch(arg, "trim", 3)) {
339 /* Trim off any partial edge MCUs that the transform can't handle. */
340 transformoption.trim = TRUE;
343 usage(); /* bogus switch */
347 /* Post-switch-scanning cleanup */
351 #ifdef C_PROGRESSIVE_SUPPORTED
352 if (simple_progressive) /* process -progressive; -scans can override */
353 jpeg_simple_progression(cinfo);
356 #ifdef C_MULTISCAN_FILES_SUPPORTED
357 if (scansarg != NULL) /* process -scans if it was present */
358 if (! read_scan_script(cinfo, scansarg))
363 return argn; /* return index of next arg (file name) */
372 main (int argc, char **argv)
374 struct jpeg_decompress_struct srcinfo;
375 struct jpeg_compress_struct dstinfo;
376 struct jpeg_error_mgr jsrcerr, jdsterr;
377 #ifdef PROGRESS_REPORT
378 struct cdjpeg_progress_mgr progress;
380 jvirt_barray_ptr * src_coef_arrays;
381 jvirt_barray_ptr * dst_coef_arrays;
383 /* We assume all-in-memory processing and can therefore use only a
384 * single file pointer for sequential input and output operation.
388 /* On Mac, fetch a command line. */
390 argc = ccommand(&argv);
394 if (progname == NULL || progname[0] == 0)
395 progname = "jpegtran"; /* in case C library doesn't provide it */
397 /* Initialize the JPEG decompression object with default error handling. */
398 srcinfo.err = jpeg_std_error(&jsrcerr);
399 jpeg_create_decompress(&srcinfo);
400 /* Initialize the JPEG compression object with default error handling. */
401 dstinfo.err = jpeg_std_error(&jdsterr);
402 jpeg_create_compress(&dstinfo);
404 /* Scan command line to find file names.
405 * It is convenient to use just one switch-parsing routine, but the switch
406 * values read here are mostly ignored; we will rescan the switches after
407 * opening the input file. Also note that most of the switches affect the
408 * destination JPEG object, so we parse into that and then copy over what
409 * needs to affects the source too.
412 file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
413 jsrcerr.trace_level = jdsterr.trace_level;
414 srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
416 #ifdef TWO_FILE_COMMANDLINE
417 /* Must have either -outfile switch or explicit output file name */
418 if (outfilename == NULL) {
419 if (file_index != argc-2) {
420 fprintf(stderr, "%s: must name one input and one output file\n",
424 outfilename = argv[file_index+1];
426 if (file_index != argc-1) {
427 fprintf(stderr, "%s: must name one input and one output file\n",
433 /* Unix style: expect zero or one file name */
434 if (file_index < argc-1) {
435 fprintf(stderr, "%s: only one input file\n", progname);
438 #endif /* TWO_FILE_COMMANDLINE */
440 /* Open the input file. */
441 if (file_index < argc) {
442 if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
443 fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
447 /* default input file is stdin */
451 #ifdef PROGRESS_REPORT
452 start_progress_monitor((j_common_ptr) &dstinfo, &progress);
455 /* Specify data source for decompression */
456 jpeg_stdio_src(&srcinfo, fp);
458 /* Enable saving of extra markers that we want to copy */
459 jcopy_markers_setup(&srcinfo, copyoption);
461 /* Read file header */
462 (void) jpeg_read_header(&srcinfo, TRUE);
464 /* Any space needed by a transform option must be requested before
465 * jpeg_read_coefficients so that memory allocation will be done right.
467 #if TRANSFORMS_SUPPORTED
468 /* Fail right away if -perfect is given and transformation is not perfect.
470 if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
471 fprintf(stderr, "%s: transformation is not perfect\n", progname);
476 /* Read source file as DCT coefficients */
477 src_coef_arrays = jpeg_read_coefficients(&srcinfo);
479 /* Initialize destination compression parameters from source values */
480 jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
482 /* Adjust destination parameters if required by transform options;
483 * also find out which set of coefficient arrays will hold the output.
485 #if TRANSFORMS_SUPPORTED
486 dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
490 dst_coef_arrays = src_coef_arrays;
493 /* Close input file, if we opened it.
494 * Note: we assume that jpeg_read_coefficients consumed all input
495 * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
496 * only consume more while (! cinfo->inputctl->eoi_reached).
497 * We cannot call jpeg_finish_decompress here since we still need the
498 * virtual arrays allocated from the source object for processing.
503 /* Open the output file. */
504 if (outfilename != NULL) {
505 if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
506 fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
510 /* default output file is stdout */
514 /* Adjust default compression parameters by re-parsing the options */
515 file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
517 /* Specify data destination for compression */
518 jpeg_stdio_dest(&dstinfo, fp);
520 /* Start compressor (note no image data is actually written here) */
521 jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
523 /* Copy to the output file any extra markers that we want to preserve */
524 jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
526 /* Execute image transformation, if any */
527 #if TRANSFORMS_SUPPORTED
528 jtransform_execute_transformation(&srcinfo, &dstinfo,
533 /* Finish compression and release memory */
534 jpeg_finish_compress(&dstinfo);
535 jpeg_destroy_compress(&dstinfo);
536 (void) jpeg_finish_decompress(&srcinfo);
537 jpeg_destroy_decompress(&srcinfo);
539 /* Close output file, if we opened it */
543 #ifdef PROGRESS_REPORT
544 end_progress_monitor((j_common_ptr) &dstinfo);
548 exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
549 return 0; /* suppress no-return-value warnings */