4 * This file was part of the Independent JPEG Group's software:
5 * Copyright (C) 1991-1998, Thomas G. Lane.
6 * Modified 2003-2011 by Guido Vollbeding.
7 * libjpeg-turbo Modifications:
8 * Copyright (C) 2010, 2013-2014, 2017, 2019-2022, D. R. Commander.
9 * For conditions of distribution and use, see the accompanying README.ijg
12 * This file contains a command-line user interface for the JPEG compressor.
13 * It should work on any system with Unix- or MS-DOS-style command lines.
15 * Two different command line styles are permitted, depending on the
16 * compile-time switch TWO_FILE_COMMANDLINE:
17 * cjpeg [options] inputfile outputfile
18 * cjpeg [options] [inputfile]
19 * In the second style, output is always to standard output, which you'd
20 * normally redirect to a file or pipe to some other program. Input is
21 * either from a named file or from standard input (typically redirected).
22 * The second style is convenient on Unix but is unhelpful on systems that
23 * don't support pipes. Also, you MUST use the first style if your system
24 * doesn't do binary I/O to stdin/stdout.
25 * To simplify script writing, the "-outfile" switch is provided. The syntax
26 * cjpeg [options] -outfile outputfile inputfile
27 * works regardless of which command line style is used.
31 #define _CRT_SECURE_NO_DEPRECATE
35 #define JPEG_INTERNALS
37 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
38 #include "jversion.h" /* for version message */
39 #include "jconfigint.h"
42 /* Create the add-on message string table. */
44 #define JMESSAGE(code, string) string,
46 static const char * const cdjpeg_message_table[] = {
53 * This routine determines what format the input file is,
54 * and selects the appropriate input-reading module.
56 * To determine which family of input formats the file belongs to,
57 * we may look only at the first byte of the file, since C does not
58 * guarantee that more than one character can be pushed back with ungetc.
59 * Looking at additional bytes would require one of these approaches:
60 * 1) assume we can fseek() the input file (fails for piped input);
61 * 2) assume we can push back more than one character (works in
62 * some C implementations, but unportable);
63 * 3) provide our own buffering (breaks input readers that want to use
65 * or 4) don't put back the data, and modify the input_init methods to assume
66 * they start reading after the start of file.
67 * #1 is attractive for MS-DOS but is untenable on Unix.
69 * The most portable solution for file types that can't be identified by their
70 * first byte is to make the user tell us what they are. This is also the
71 * only approach for "raw" file types that contain only arbitrary values.
72 * We presently apply this method for Targa files. Most of the time Targa
73 * files start with 0x00, so we recognize that case. Potentially, however,
74 * a Targa file could start with any byte value (byte 0 is the length of the
75 * seldom-used ID field), so we provide a switch to force Targa input mode.
78 static boolean is_targa; /* records user -targa switch */
81 LOCAL(cjpeg_source_ptr)
82 select_file_type(j_compress_ptr cinfo, FILE *infile)
87 #ifdef TARGA_SUPPORTED
88 return jinit_read_targa(cinfo);
90 ERREXIT(cinfo, JERR_TGA_NOTCOMP);
94 if ((c = getc(infile)) == EOF)
95 ERREXIT(cinfo, JERR_INPUT_EMPTY);
96 if (ungetc(c, infile) == EOF)
97 ERREXIT(cinfo, JERR_UNGETC_FAILED);
102 return jinit_read_bmp(cinfo, TRUE);
106 return jinit_read_gif(cinfo);
110 return jinit_read_ppm(cinfo);
112 #ifdef TARGA_SUPPORTED
114 return jinit_read_targa(cinfo);
117 ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
121 return NULL; /* suppress compiler warnings */
126 * Argument-parsing code.
127 * The switch parser is designed to be useful with DOS-style command line
128 * syntax, ie, intermixed switches and file names, where only the switches
129 * to the left of a given file name affect processing of that file.
130 * The main program in this file doesn't actually use this capability...
134 static const char *progname; /* program name for error messages */
135 static char *icc_filename; /* for -icc switch */
136 static char *outfilename; /* for -outfile switch */
137 boolean memdst; /* for -memdst switch */
138 boolean report; /* for -report switch */
139 boolean strict; /* for -strict switch */
146 struct my_error_mgr {
147 struct jpeg_error_mgr pub;
148 jmp_buf setjmp_buffer;
151 void my_error_exit(j_common_ptr cinfo)
153 struct my_error_mgr *myerr = (struct my_error_mgr *)cinfo->err;
155 longjmp(myerr->setjmp_buffer, 1);
158 static void my_emit_message_fuzzer(j_common_ptr cinfo, int msg_level)
161 cinfo->err->num_warnings++;
164 #define HANDLE_ERROR() { \
165 if (cinfo.global_state > CSTATE_START) { \
166 if (memdst && outbuffer) \
167 (*cinfo.dest->term_destination) (&cinfo); \
168 jpeg_abort_compress(&cinfo); \
170 jpeg_destroy_compress(&cinfo); \
171 if (input_file != stdin && input_file != NULL) \
172 fclose(input_file); \
175 return EXIT_FAILURE; \
183 /* complain about bad command line */
185 fprintf(stderr, "usage: %s [switches] ", progname);
186 #ifdef TWO_FILE_COMMANDLINE
187 fprintf(stderr, "inputfile outputfile\n");
189 fprintf(stderr, "[inputfile]\n");
192 fprintf(stderr, "Switches (names may be abbreviated):\n");
193 fprintf(stderr, " -quality N[,...] Compression quality (0..100; 5-95 is most useful range,\n");
194 fprintf(stderr, " default is 75)\n");
195 fprintf(stderr, " -grayscale Create monochrome JPEG file\n");
196 fprintf(stderr, " -rgb Create RGB JPEG file\n");
197 #ifdef ENTROPY_OPT_SUPPORTED
198 fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
200 #ifdef C_PROGRESSIVE_SUPPORTED
201 fprintf(stderr, " -progressive Create progressive JPEG file\n");
203 #ifdef TARGA_SUPPORTED
204 fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n");
206 fprintf(stderr, "Switches for advanced users:\n");
207 #ifdef C_ARITH_CODING_SUPPORTED
208 fprintf(stderr, " -arithmetic Use arithmetic coding\n");
210 #ifdef DCT_ISLOW_SUPPORTED
211 fprintf(stderr, " -dct int Use accurate integer DCT method%s\n",
212 (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
214 #ifdef DCT_IFAST_SUPPORTED
215 fprintf(stderr, " -dct fast Use less accurate integer DCT method [legacy feature]%s\n",
216 (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
218 #ifdef DCT_FLOAT_SUPPORTED
219 fprintf(stderr, " -dct float Use floating-point DCT method [legacy feature]%s\n",
220 (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
222 fprintf(stderr, " -icc FILE Embed ICC profile contained in FILE\n");
223 fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
224 #ifdef INPUT_SMOOTHING_SUPPORTED
225 fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n");
227 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
228 fprintf(stderr, " -outfile name Specify name for output file\n");
229 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
230 fprintf(stderr, " -memdst Compress to memory instead of file (useful for benchmarking)\n");
232 fprintf(stderr, " -report Report compression progress\n");
233 fprintf(stderr, " -strict Treat all warnings as fatal\n");
234 fprintf(stderr, " -verbose or -debug Emit debug output\n");
235 fprintf(stderr, " -version Print version information and exit\n");
236 fprintf(stderr, "Switches for wizards:\n");
237 fprintf(stderr, " -baseline Force baseline quantization tables\n");
238 fprintf(stderr, " -qtables FILE Use quantization tables given in FILE\n");
239 fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
240 fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
241 #ifdef C_MULTISCAN_FILES_SUPPORTED
242 fprintf(stderr, " -scans FILE Create multi-scan JPEG per script FILE\n");
249 parse_switches(j_compress_ptr cinfo, int argc, char **argv,
250 int last_file_arg_seen, boolean for_real)
251 /* Parse optional switches.
252 * Returns argv[] index of first file-name argument (== argc if none).
253 * Any file names with indexes <= last_file_arg_seen are ignored;
254 * they have presumably been processed in a previous iteration.
255 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
256 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
262 boolean force_baseline;
263 boolean simple_progressive;
264 char *qualityarg = NULL; /* saves -quality parm if any */
265 char *qtablefile = NULL; /* saves -qtables filename if any */
266 char *qslotsarg = NULL; /* saves -qslots parm if any */
267 char *samplearg = NULL; /* saves -sample parm if any */
268 char *scansarg = NULL; /* saves -scans parm if any */
270 /* Set up default JPEG parameters. */
272 force_baseline = FALSE; /* by default, allow 16-bit quantizers */
273 simple_progressive = FALSE;
280 cinfo->err->trace_level = 0;
282 /* Scan command line options, adjust parameters */
284 for (argn = 1; argn < argc; argn++) {
287 /* Not a switch, must be a file name argument */
288 if (argn <= last_file_arg_seen) {
289 outfilename = NULL; /* -outfile applies to just one input file */
290 continue; /* ignore this name if previously processed */
292 break; /* else done parsing switches */
294 arg++; /* advance past switch marker character */
296 if (keymatch(arg, "arithmetic", 1)) {
297 /* Use arithmetic coding. */
298 #ifdef C_ARITH_CODING_SUPPORTED
299 cinfo->arith_code = TRUE;
301 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
306 } else if (keymatch(arg, "baseline", 1)) {
307 /* Force baseline-compatible output (8-bit quantizer values). */
308 force_baseline = TRUE;
310 } else if (keymatch(arg, "dct", 2)) {
311 /* Select DCT algorithm. */
312 if (++argn >= argc) /* advance to next argument */
314 if (keymatch(argv[argn], "int", 1)) {
315 cinfo->dct_method = JDCT_ISLOW;
316 } else if (keymatch(argv[argn], "fast", 2)) {
317 cinfo->dct_method = JDCT_IFAST;
318 } else if (keymatch(argv[argn], "float", 2)) {
319 cinfo->dct_method = JDCT_FLOAT;
323 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
324 /* Enable debug printouts. */
325 /* On first -d, print version identification */
326 static boolean printed_version = FALSE;
328 if (!printed_version) {
329 fprintf(stderr, "%s version %s (build %s)\n",
330 PACKAGE_NAME, VERSION, BUILD);
331 fprintf(stderr, "%s\n\n", JCOPYRIGHT);
332 fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
334 printed_version = TRUE;
336 cinfo->err->trace_level++;
338 } else if (keymatch(arg, "version", 4)) {
339 fprintf(stderr, "%s version %s (build %s)\n",
340 PACKAGE_NAME, VERSION, BUILD);
343 } else if (keymatch(arg, "grayscale", 2) ||
344 keymatch(arg, "greyscale", 2)) {
345 /* Force a monochrome JPEG file to be generated. */
346 jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
348 } else if (keymatch(arg, "rgb", 3)) {
349 /* Force an RGB JPEG file to be generated. */
350 jpeg_set_colorspace(cinfo, JCS_RGB);
352 } else if (keymatch(arg, "icc", 1)) {
353 /* Set ICC filename. */
354 if (++argn >= argc) /* advance to next argument */
356 icc_filename = argv[argn];
358 } else if (keymatch(arg, "maxmemory", 3)) {
359 /* Maximum memory in Kb (or Mb with 'm'). */
363 if (++argn >= argc) /* advance to next argument */
365 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
367 if (ch == 'm' || ch == 'M')
369 cinfo->mem->max_memory_to_use = lval * 1000L;
371 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
372 /* Enable entropy parm optimization. */
373 #ifdef ENTROPY_OPT_SUPPORTED
374 cinfo->optimize_coding = TRUE;
376 fprintf(stderr, "%s: sorry, entropy optimization was not compiled in\n",
381 } else if (keymatch(arg, "outfile", 4)) {
382 /* Set output file name. */
383 if (++argn >= argc) /* advance to next argument */
385 outfilename = argv[argn]; /* save it away for later use */
387 } else if (keymatch(arg, "progressive", 1)) {
388 /* Select simple progressive mode. */
389 #ifdef C_PROGRESSIVE_SUPPORTED
390 simple_progressive = TRUE;
391 /* We must postpone execution until num_components is known. */
393 fprintf(stderr, "%s: sorry, progressive output was not compiled in\n",
398 } else if (keymatch(arg, "memdst", 2)) {
399 /* Use in-memory destination manager */
400 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
403 fprintf(stderr, "%s: sorry, in-memory destination manager was not compiled in\n",
408 } else if (keymatch(arg, "quality", 1)) {
409 /* Quality ratings (quantization table scaling factors). */
410 if (++argn >= argc) /* advance to next argument */
412 qualityarg = argv[argn];
414 } else if (keymatch(arg, "qslots", 2)) {
415 /* Quantization table slot numbers. */
416 if (++argn >= argc) /* advance to next argument */
418 qslotsarg = argv[argn];
419 /* Must delay setting qslots until after we have processed any
420 * colorspace-determining switches, since jpeg_set_colorspace sets
421 * default quant table numbers.
424 } else if (keymatch(arg, "qtables", 2)) {
425 /* Quantization tables fetched from file. */
426 if (++argn >= argc) /* advance to next argument */
428 qtablefile = argv[argn];
429 /* We postpone actually reading the file in case -quality comes later. */
431 } else if (keymatch(arg, "report", 3)) {
434 } else if (keymatch(arg, "restart", 1)) {
435 /* Restart interval in MCU rows (or in MCUs with 'b'). */
439 if (++argn >= argc) /* advance to next argument */
441 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
443 if (lval < 0 || lval > 65535L)
445 if (ch == 'b' || ch == 'B') {
446 cinfo->restart_interval = (unsigned int)lval;
447 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
449 cinfo->restart_in_rows = (int)lval;
450 /* restart_interval will be computed during startup */
453 } else if (keymatch(arg, "sample", 2)) {
454 /* Set sampling factors. */
455 if (++argn >= argc) /* advance to next argument */
457 samplearg = argv[argn];
458 /* Must delay setting sample factors until after we have processed any
459 * colorspace-determining switches, since jpeg_set_colorspace sets
460 * default sampling factors.
463 } else if (keymatch(arg, "scans", 4)) {
464 /* Set scan script. */
465 #ifdef C_MULTISCAN_FILES_SUPPORTED
466 if (++argn >= argc) /* advance to next argument */
468 scansarg = argv[argn];
469 /* We must postpone reading the file in case -progressive appears. */
471 fprintf(stderr, "%s: sorry, multi-scan output was not compiled in\n",
476 } else if (keymatch(arg, "smooth", 2)) {
477 /* Set input smoothing factor. */
480 if (++argn >= argc) /* advance to next argument */
482 if (sscanf(argv[argn], "%d", &val) != 1)
484 if (val < 0 || val > 100)
486 cinfo->smoothing_factor = val;
488 } else if (keymatch(arg, "strict", 2)) {
491 } else if (keymatch(arg, "targa", 1)) {
492 /* Input file is Targa format. */
496 usage(); /* bogus switch */
500 /* Post-switch-scanning cleanup */
504 /* Set quantization tables for selected quality. */
505 /* Some or all may be overridden if -qtables is present. */
506 if (qualityarg != NULL) /* process -quality if it was present */
507 if (!set_quality_ratings(cinfo, qualityarg, force_baseline))
510 if (qtablefile != NULL) /* process -qtables if it was present */
511 if (!read_quant_tables(cinfo, qtablefile, force_baseline))
514 if (qslotsarg != NULL) /* process -qslots if it was present */
515 if (!set_quant_slots(cinfo, qslotsarg))
518 if (samplearg != NULL) /* process -sample if it was present */
519 if (!set_sample_factors(cinfo, samplearg))
522 #ifdef C_PROGRESSIVE_SUPPORTED
523 if (simple_progressive) /* process -progressive; -scans can override */
524 jpeg_simple_progression(cinfo);
527 #ifdef C_MULTISCAN_FILES_SUPPORTED
528 if (scansarg != NULL) /* process -scans if it was present */
529 if (!read_scan_script(cinfo, scansarg))
534 return argn; /* return index of next arg (file name) */
539 my_emit_message(j_common_ptr cinfo, int msg_level)
542 /* Treat warning as fatal */
543 cinfo->err->error_exit(cinfo);
545 if (cinfo->err->trace_level >= msg_level)
546 cinfo->err->output_message(cinfo);
556 main(int argc, char **argv)
558 struct jpeg_compress_struct cinfo;
560 struct my_error_mgr myerr;
561 struct jpeg_error_mgr &jerr = myerr.pub;
563 struct jpeg_error_mgr jerr;
565 struct cdjpeg_progress_mgr progress;
567 cjpeg_source_ptr src_mgr;
568 FILE *input_file = NULL;
570 JOCTET *icc_profile = NULL;
572 FILE *output_file = NULL;
573 unsigned char *outbuffer = NULL;
574 unsigned long outsize = 0;
575 JDIMENSION num_scanlines;
578 if (progname == NULL || progname[0] == 0)
579 progname = "cjpeg"; /* in case C library doesn't provide it */
581 /* Initialize the JPEG compression object with default error handling. */
582 cinfo.err = jpeg_std_error(&jerr);
583 jpeg_create_compress(&cinfo);
584 /* Add some application-specific error messages (from cderror.h) */
585 jerr.addon_message_table = cdjpeg_message_table;
586 jerr.first_addon_message = JMSG_FIRSTADDONCODE;
587 jerr.last_addon_message = JMSG_LASTADDONCODE;
589 /* Initialize JPEG parameters.
590 * Much of this may be overridden later.
591 * In particular, we don't yet know the input file's color space,
592 * but we need to provide some value for jpeg_set_defaults() to work.
595 cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
596 jpeg_set_defaults(&cinfo);
598 /* Scan command line to find file names.
599 * It is convenient to use just one switch-parsing routine, but the switch
600 * values read here are ignored; we will rescan the switches after opening
604 file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
607 jerr.emit_message = my_emit_message;
609 #ifdef TWO_FILE_COMMANDLINE
611 /* Must have either -outfile switch or explicit output file name */
612 if (outfilename == NULL) {
613 if (file_index != argc - 2) {
614 fprintf(stderr, "%s: must name one input and one output file\n",
618 outfilename = argv[file_index + 1];
620 if (file_index != argc - 1) {
621 fprintf(stderr, "%s: must name one input and one output file\n",
628 /* Unix style: expect zero or one file name */
629 if (file_index < argc - 1) {
630 fprintf(stderr, "%s: only one input file\n", progname);
633 #endif /* TWO_FILE_COMMANDLINE */
635 /* Open the input file. */
636 if (file_index < argc) {
637 if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
638 fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
642 /* default input file is stdin */
643 input_file = read_stdin();
646 /* Open the output file. */
647 if (outfilename != NULL) {
648 if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
649 fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
652 } else if (!memdst) {
653 /* default output file is stdout */
654 output_file = write_stdout();
657 if (icc_filename != NULL) {
658 if ((icc_file = fopen(icc_filename, READ_BINARY)) == NULL) {
659 fprintf(stderr, "%s: can't open %s\n", progname, icc_filename);
662 if (fseek(icc_file, 0, SEEK_END) < 0 ||
663 (icc_len = ftell(icc_file)) < 1 ||
664 fseek(icc_file, 0, SEEK_SET) < 0) {
665 fprintf(stderr, "%s: can't determine size of %s\n", progname,
669 if ((icc_profile = (JOCTET *)malloc(icc_len)) == NULL) {
670 fprintf(stderr, "%s: can't allocate memory for ICC profile\n", progname);
674 if (fread(icc_profile, icc_len, 1, icc_file) < 1) {
675 fprintf(stderr, "%s: can't read ICC profile from %s\n", progname,
685 jerr.error_exit = my_error_exit;
686 jerr.emit_message = my_emit_message_fuzzer;
687 if (setjmp(myerr.setjmp_buffer))
692 start_progress_monitor((j_common_ptr)&cinfo, &progress);
693 progress.report = report;
696 /* Figure out the input file format, and set up to read it. */
697 src_mgr = select_file_type(&cinfo, input_file);
698 src_mgr->input_file = input_file;
700 src_mgr->max_pixels = 1048576;
703 /* Read the input file header to obtain file size & colorspace. */
704 (*src_mgr->start_input) (&cinfo, src_mgr);
706 /* Now that we know input colorspace, fix colorspace-dependent defaults */
707 jpeg_default_colorspace(&cinfo);
709 /* Adjust default compression parameters by re-parsing the options */
710 file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
712 /* Specify data destination for compression */
713 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
715 jpeg_mem_dest(&cinfo, &outbuffer, &outsize);
718 jpeg_stdio_dest(&cinfo, output_file);
721 if (setjmp(myerr.setjmp_buffer))
725 /* Start compressor */
726 jpeg_start_compress(&cinfo, TRUE);
728 if (icc_profile != NULL)
729 jpeg_write_icc_profile(&cinfo, icc_profile, (unsigned int)icc_len);
732 while (cinfo.next_scanline < cinfo.image_height) {
733 num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
734 (void)jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
737 /* Finish compression and release memory */
738 (*src_mgr->finish_input) (&cinfo, src_mgr);
739 jpeg_finish_compress(&cinfo);
740 jpeg_destroy_compress(&cinfo);
742 /* Close files, if we opened them */
743 if (input_file != stdin)
745 if (output_file != stdout && output_file != NULL)
749 end_progress_monitor((j_common_ptr)&cinfo);
753 fprintf(stderr, "Compressed size: %lu bytes\n", outsize);
761 return (jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);