1 /*
2 * cjpeg.c
3 *
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, D. R. Commander.
9 * For conditions of distribution and use, see the accompanying README.ijg
10 * file.
11 *
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.
14 *
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.
28 */
29
30 #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
31 #include "jversion.h" /* for version message */
32 #include "jconfigint.h"
33
34 #ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
35 extern void *malloc(size_t size);
36 extern void free(void *ptr);
37 #endif
38
39 #ifdef USE_CCOMMAND /* command-line reader for Macintosh */
40 #ifdef __MWERKS__
41 #include <SIOUX.h> /* Metrowerks needs this */
42 #include <console.h> /* ... and this */
43 #endif
44 #ifdef THINK_C
45 #include <console.h> /* Think declares it here */
46 #endif
47 #endif
48
49
50 /* Create the add-on message string table. */
51
52 #define JMESSAGE(code, string) string,
53
54 static const char * const cdjpeg_message_table[] = {
55 #include "cderror.h"
56 NULL
57 };
58
59
60 /*
61 * This routine determines what format the input file is,
62 * and selects the appropriate input-reading module.
63 *
64 * To determine which family of input formats the file belongs to,
65 * we may look only at the first byte of the file, since C does not
66 * guarantee that more than one character can be pushed back with ungetc.
67 * Looking at additional bytes would require one of these approaches:
68 * 1) assume we can fseek() the input file (fails for piped input);
69 * 2) assume we can push back more than one character (works in
70 * some C implementations, but unportable);
71 * 3) provide our own buffering (breaks input readers that want to use
72 * stdio directly, such as the RLE library);
73 * or 4) don't put back the data, and modify the input_init methods to assume
74 * they start reading after the start of file (also breaks RLE library).
75 * #1 is attractive for MS-DOS but is untenable on Unix.
76 *
77 * The most portable solution for file types that can't be identified by their
78 * first byte is to make the user tell us what they are. This is also the
79 * only approach for "raw" file types that contain only arbitrary values.
80 * We presently apply this method for Targa files. Most of the time Targa
81 * files start with 0x00, so we recognize that case. Potentially, however,
82 * a Targa file could start with any byte value (byte 0 is the length of the
83 * seldom-used ID field), so we provide a switch to force Targa input mode.
84 */
85
86 static boolean is_targa; /* records user -targa switch */
87
88
89 LOCAL(cjpeg_source_ptr)
select_file_type(j_compress_ptr cinfo,FILE * infile)90 select_file_type(j_compress_ptr cinfo, FILE *infile)
91 {
92 int c;
93
94 if (is_targa) {
95 #ifdef TARGA_SUPPORTED
96 return jinit_read_targa(cinfo);
97 #else
98 ERREXIT(cinfo, JERR_TGA_NOTCOMP);
99 #endif
100 }
101
102 if ((c = getc(infile)) == EOF)
103 ERREXIT(cinfo, JERR_INPUT_EMPTY);
104 if (ungetc(c, infile) == EOF)
105 ERREXIT(cinfo, JERR_UNGETC_FAILED);
106
107 switch (c) {
108 #ifdef BMP_SUPPORTED
109 case 'B':
110 return jinit_read_bmp(cinfo, TRUE);
111 #endif
112 #ifdef GIF_SUPPORTED
113 case 'G':
114 return jinit_read_gif(cinfo);
115 #endif
116 #ifdef PPM_SUPPORTED
117 case 'P':
118 return jinit_read_ppm(cinfo);
119 #endif
120 #ifdef RLE_SUPPORTED
121 case 'R':
122 return jinit_read_rle(cinfo);
123 #endif
124 #ifdef TARGA_SUPPORTED
125 case 0x00:
126 return jinit_read_targa(cinfo);
127 #endif
128 default:
129 ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
130 break;
131 }
132
133 return NULL; /* suppress compiler warnings */
134 }
135
136
137 /*
138 * Argument-parsing code.
139 * The switch parser is designed to be useful with DOS-style command line
140 * syntax, ie, intermixed switches and file names, where only the switches
141 * to the left of a given file name affect processing of that file.
142 * The main program in this file doesn't actually use this capability...
143 */
144
145
146 static const char *progname; /* program name for error messages */
147 static char *icc_filename; /* for -icc switch */
148 static char *outfilename; /* for -outfile switch */
149 boolean memdst; /* for -memdst switch */
150
151
152 LOCAL(void)
usage(void)153 usage(void)
154 /* complain about bad command line */
155 {
156 fprintf(stderr, "usage: %s [switches] ", progname);
157 #ifdef TWO_FILE_COMMANDLINE
158 fprintf(stderr, "inputfile outputfile\n");
159 #else
160 fprintf(stderr, "[inputfile]\n");
161 #endif
162
163 fprintf(stderr, "Switches (names may be abbreviated):\n");
164 fprintf(stderr, " -quality N[,...] Compression quality (0..100; 5-95 is most useful range,\n");
165 fprintf(stderr, " default is 75)\n");
166 fprintf(stderr, " -grayscale Create monochrome JPEG file\n");
167 fprintf(stderr, " -rgb Create RGB JPEG file\n");
168 #ifdef ENTROPY_OPT_SUPPORTED
169 fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
170 #endif
171 #ifdef C_PROGRESSIVE_SUPPORTED
172 fprintf(stderr, " -progressive Create progressive JPEG file\n");
173 #endif
174 #ifdef TARGA_SUPPORTED
175 fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n");
176 #endif
177 fprintf(stderr, "Switches for advanced users:\n");
178 #ifdef C_ARITH_CODING_SUPPORTED
179 fprintf(stderr, " -arithmetic Use arithmetic coding\n");
180 #endif
181 #ifdef DCT_ISLOW_SUPPORTED
182 fprintf(stderr, " -dct int Use integer DCT method%s\n",
183 (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
184 #endif
185 #ifdef DCT_IFAST_SUPPORTED
186 fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
187 (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
188 #endif
189 #ifdef DCT_FLOAT_SUPPORTED
190 fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
191 (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
192 #endif
193 fprintf(stderr, " -icc FILE Embed ICC profile contained in FILE\n");
194 fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
195 #ifdef INPUT_SMOOTHING_SUPPORTED
196 fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n");
197 #endif
198 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
199 fprintf(stderr, " -outfile name Specify name for output file\n");
200 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
201 fprintf(stderr, " -memdst Compress to memory instead of file (useful for benchmarking)\n");
202 #endif
203 fprintf(stderr, " -verbose or -debug Emit debug output\n");
204 fprintf(stderr, " -version Print version information and exit\n");
205 fprintf(stderr, "Switches for wizards:\n");
206 fprintf(stderr, " -baseline Force baseline quantization tables\n");
207 fprintf(stderr, " -qtables FILE Use quantization tables given in FILE\n");
208 fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
209 fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
210 #ifdef C_MULTISCAN_FILES_SUPPORTED
211 fprintf(stderr, " -scans FILE Create multi-scan JPEG per script FILE\n");
212 #endif
213 exit(EXIT_FAILURE);
214 }
215
216
217 LOCAL(int)
parse_switches(j_compress_ptr cinfo,int argc,char ** argv,int last_file_arg_seen,boolean for_real)218 parse_switches(j_compress_ptr cinfo, int argc, char **argv,
219 int last_file_arg_seen, boolean for_real)
220 /* Parse optional switches.
221 * Returns argv[] index of first file-name argument (== argc if none).
222 * Any file names with indexes <= last_file_arg_seen are ignored;
223 * they have presumably been processed in a previous iteration.
224 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
225 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
226 * processing.
227 */
228 {
229 int argn;
230 char *arg;
231 boolean force_baseline;
232 boolean simple_progressive;
233 char *qualityarg = NULL; /* saves -quality parm if any */
234 char *qtablefile = NULL; /* saves -qtables filename if any */
235 char *qslotsarg = NULL; /* saves -qslots parm if any */
236 char *samplearg = NULL; /* saves -sample parm if any */
237 char *scansarg = NULL; /* saves -scans parm if any */
238
239 /* Set up default JPEG parameters. */
240
241 force_baseline = FALSE; /* by default, allow 16-bit quantizers */
242 simple_progressive = FALSE;
243 is_targa = FALSE;
244 icc_filename = NULL;
245 outfilename = NULL;
246 memdst = FALSE;
247 cinfo->err->trace_level = 0;
248
249 /* Scan command line options, adjust parameters */
250
251 for (argn = 1; argn < argc; argn++) {
252 arg = argv[argn];
253 if (*arg != '-') {
254 /* Not a switch, must be a file name argument */
255 if (argn <= last_file_arg_seen) {
256 outfilename = NULL; /* -outfile applies to just one input file */
257 continue; /* ignore this name if previously processed */
258 }
259 break; /* else done parsing switches */
260 }
261 arg++; /* advance past switch marker character */
262
263 if (keymatch(arg, "arithmetic", 1)) {
264 /* Use arithmetic coding. */
265 #ifdef C_ARITH_CODING_SUPPORTED
266 cinfo->arith_code = TRUE;
267 #else
268 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
269 progname);
270 exit(EXIT_FAILURE);
271 #endif
272
273 } else if (keymatch(arg, "baseline", 1)) {
274 /* Force baseline-compatible output (8-bit quantizer values). */
275 force_baseline = TRUE;
276
277 } else if (keymatch(arg, "dct", 2)) {
278 /* Select DCT algorithm. */
279 if (++argn >= argc) /* advance to next argument */
280 usage();
281 if (keymatch(argv[argn], "int", 1)) {
282 cinfo->dct_method = JDCT_ISLOW;
283 } else if (keymatch(argv[argn], "fast", 2)) {
284 cinfo->dct_method = JDCT_IFAST;
285 } else if (keymatch(argv[argn], "float", 2)) {
286 cinfo->dct_method = JDCT_FLOAT;
287 } else
288 usage();
289
290 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
291 /* Enable debug printouts. */
292 /* On first -d, print version identification */
293 static boolean printed_version = FALSE;
294
295 if (!printed_version) {
296 fprintf(stderr, "%s version %s (build %s)\n",
297 PACKAGE_NAME, VERSION, BUILD);
298 fprintf(stderr, "%s\n\n", JCOPYRIGHT);
299 fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
300 JVERSION);
301 printed_version = TRUE;
302 }
303 cinfo->err->trace_level++;
304
305 } else if (keymatch(arg, "version", 4)) {
306 fprintf(stderr, "%s version %s (build %s)\n",
307 PACKAGE_NAME, VERSION, BUILD);
308 exit(EXIT_SUCCESS);
309
310 } else if (keymatch(arg, "grayscale", 2) ||
311 keymatch(arg, "greyscale", 2)) {
312 /* Force a monochrome JPEG file to be generated. */
313 jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
314
315 } else if (keymatch(arg, "rgb", 3)) {
316 /* Force an RGB JPEG file to be generated. */
317 jpeg_set_colorspace(cinfo, JCS_RGB);
318
319 } else if (keymatch(arg, "icc", 1)) {
320 /* Set ICC filename. */
321 if (++argn >= argc) /* advance to next argument */
322 usage();
323 icc_filename = argv[argn];
324
325 } else if (keymatch(arg, "maxmemory", 3)) {
326 /* Maximum memory in Kb (or Mb with 'm'). */
327 long lval;
328 char ch = 'x';
329
330 if (++argn >= argc) /* advance to next argument */
331 usage();
332 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
333 usage();
334 if (ch == 'm' || ch == 'M')
335 lval *= 1000L;
336 cinfo->mem->max_memory_to_use = lval * 1000L;
337
338 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
339 /* Enable entropy parm optimization. */
340 #ifdef ENTROPY_OPT_SUPPORTED
341 cinfo->optimize_coding = TRUE;
342 #else
343 fprintf(stderr, "%s: sorry, entropy optimization was not compiled in\n",
344 progname);
345 exit(EXIT_FAILURE);
346 #endif
347
348 } else if (keymatch(arg, "outfile", 4)) {
349 /* Set output file name. */
350 if (++argn >= argc) /* advance to next argument */
351 usage();
352 outfilename = argv[argn]; /* save it away for later use */
353
354 } else if (keymatch(arg, "progressive", 1)) {
355 /* Select simple progressive mode. */
356 #ifdef C_PROGRESSIVE_SUPPORTED
357 simple_progressive = TRUE;
358 /* We must postpone execution until num_components is known. */
359 #else
360 fprintf(stderr, "%s: sorry, progressive output was not compiled in\n",
361 progname);
362 exit(EXIT_FAILURE);
363 #endif
364
365 } else if (keymatch(arg, "memdst", 2)) {
366 /* Use in-memory destination manager */
367 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
368 memdst = TRUE;
369 #else
370 fprintf(stderr, "%s: sorry, in-memory destination manager was not compiled in\n",
371 progname);
372 exit(EXIT_FAILURE);
373 #endif
374
375 } else if (keymatch(arg, "quality", 1)) {
376 /* Quality ratings (quantization table scaling factors). */
377 if (++argn >= argc) /* advance to next argument */
378 usage();
379 qualityarg = argv[argn];
380
381 } else if (keymatch(arg, "qslots", 2)) {
382 /* Quantization table slot numbers. */
383 if (++argn >= argc) /* advance to next argument */
384 usage();
385 qslotsarg = argv[argn];
386 /* Must delay setting qslots until after we have processed any
387 * colorspace-determining switches, since jpeg_set_colorspace sets
388 * default quant table numbers.
389 */
390
391 } else if (keymatch(arg, "qtables", 2)) {
392 /* Quantization tables fetched from file. */
393 if (++argn >= argc) /* advance to next argument */
394 usage();
395 qtablefile = argv[argn];
396 /* We postpone actually reading the file in case -quality comes later. */
397
398 } else if (keymatch(arg, "restart", 1)) {
399 /* Restart interval in MCU rows (or in MCUs with 'b'). */
400 long lval;
401 char ch = 'x';
402
403 if (++argn >= argc) /* advance to next argument */
404 usage();
405 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
406 usage();
407 if (lval < 0 || lval > 65535L)
408 usage();
409 if (ch == 'b' || ch == 'B') {
410 cinfo->restart_interval = (unsigned int)lval;
411 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
412 } else {
413 cinfo->restart_in_rows = (int)lval;
414 /* restart_interval will be computed during startup */
415 }
416
417 } else if (keymatch(arg, "sample", 2)) {
418 /* Set sampling factors. */
419 if (++argn >= argc) /* advance to next argument */
420 usage();
421 samplearg = argv[argn];
422 /* Must delay setting sample factors until after we have processed any
423 * colorspace-determining switches, since jpeg_set_colorspace sets
424 * default sampling factors.
425 */
426
427 } else if (keymatch(arg, "scans", 4)) {
428 /* Set scan script. */
429 #ifdef C_MULTISCAN_FILES_SUPPORTED
430 if (++argn >= argc) /* advance to next argument */
431 usage();
432 scansarg = argv[argn];
433 /* We must postpone reading the file in case -progressive appears. */
434 #else
435 fprintf(stderr, "%s: sorry, multi-scan output was not compiled in\n",
436 progname);
437 exit(EXIT_FAILURE);
438 #endif
439
440 } else if (keymatch(arg, "smooth", 2)) {
441 /* Set input smoothing factor. */
442 int val;
443
444 if (++argn >= argc) /* advance to next argument */
445 usage();
446 if (sscanf(argv[argn], "%d", &val) != 1)
447 usage();
448 if (val < 0 || val > 100)
449 usage();
450 cinfo->smoothing_factor = val;
451
452 } else if (keymatch(arg, "targa", 1)) {
453 /* Input file is Targa format. */
454 is_targa = TRUE;
455
456 } else {
457 usage(); /* bogus switch */
458 }
459 }
460
461 /* Post-switch-scanning cleanup */
462
463 if (for_real) {
464
465 /* Set quantization tables for selected quality. */
466 /* Some or all may be overridden if -qtables is present. */
467 if (qualityarg != NULL) /* process -quality if it was present */
468 if (!set_quality_ratings(cinfo, qualityarg, force_baseline))
469 usage();
470
471 if (qtablefile != NULL) /* process -qtables if it was present */
472 if (!read_quant_tables(cinfo, qtablefile, force_baseline))
473 usage();
474
475 if (qslotsarg != NULL) /* process -qslots if it was present */
476 if (!set_quant_slots(cinfo, qslotsarg))
477 usage();
478
479 if (samplearg != NULL) /* process -sample if it was present */
480 if (!set_sample_factors(cinfo, samplearg))
481 usage();
482
483 #ifdef C_PROGRESSIVE_SUPPORTED
484 if (simple_progressive) /* process -progressive; -scans can override */
485 jpeg_simple_progression(cinfo);
486 #endif
487
488 #ifdef C_MULTISCAN_FILES_SUPPORTED
489 if (scansarg != NULL) /* process -scans if it was present */
490 if (!read_scan_script(cinfo, scansarg))
491 usage();
492 #endif
493 }
494
495 return argn; /* return index of next arg (file name) */
496 }
497
498
499 /*
500 * The main program.
501 */
502
503 int
main(int argc,char ** argv)504 main(int argc, char **argv)
505 {
506 struct jpeg_compress_struct cinfo;
507 struct jpeg_error_mgr jerr;
508 #ifdef PROGRESS_REPORT
509 struct cdjpeg_progress_mgr progress;
510 #endif
511 int file_index;
512 cjpeg_source_ptr src_mgr;
513 FILE *input_file;
514 FILE *icc_file;
515 JOCTET *icc_profile = NULL;
516 long icc_len = 0;
517 FILE *output_file = NULL;
518 unsigned char *outbuffer = NULL;
519 unsigned long outsize = 0;
520 JDIMENSION num_scanlines;
521
522 /* On Mac, fetch a command line. */
523 #ifdef USE_CCOMMAND
524 argc = ccommand(&argv);
525 #endif
526
527 progname = argv[0];
528 if (progname == NULL || progname[0] == 0)
529 progname = "cjpeg"; /* in case C library doesn't provide it */
530
531 /* Initialize the JPEG compression object with default error handling. */
532 cinfo.err = jpeg_std_error(&jerr);
533 jpeg_create_compress(&cinfo);
534 /* Add some application-specific error messages (from cderror.h) */
535 jerr.addon_message_table = cdjpeg_message_table;
536 jerr.first_addon_message = JMSG_FIRSTADDONCODE;
537 jerr.last_addon_message = JMSG_LASTADDONCODE;
538
539 /* Initialize JPEG parameters.
540 * Much of this may be overridden later.
541 * In particular, we don't yet know the input file's color space,
542 * but we need to provide some value for jpeg_set_defaults() to work.
543 */
544
545 cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
546 jpeg_set_defaults(&cinfo);
547
548 /* Scan command line to find file names.
549 * It is convenient to use just one switch-parsing routine, but the switch
550 * values read here are ignored; we will rescan the switches after opening
551 * the input file.
552 */
553
554 file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
555
556 #ifdef TWO_FILE_COMMANDLINE
557 if (!memdst) {
558 /* Must have either -outfile switch or explicit output file name */
559 if (outfilename == NULL) {
560 if (file_index != argc - 2) {
561 fprintf(stderr, "%s: must name one input and one output file\n",
562 progname);
563 usage();
564 }
565 outfilename = argv[file_index + 1];
566 } else {
567 if (file_index != argc - 1) {
568 fprintf(stderr, "%s: must name one input and one output file\n",
569 progname);
570 usage();
571 }
572 }
573 }
574 #else
575 /* Unix style: expect zero or one file name */
576 if (file_index < argc - 1) {
577 fprintf(stderr, "%s: only one input file\n", progname);
578 usage();
579 }
580 #endif /* TWO_FILE_COMMANDLINE */
581
582 /* Open the input file. */
583 if (file_index < argc) {
584 if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
585 fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
586 exit(EXIT_FAILURE);
587 }
588 } else {
589 /* default input file is stdin */
590 input_file = read_stdin();
591 }
592
593 /* Open the output file. */
594 if (outfilename != NULL) {
595 if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
596 fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
597 exit(EXIT_FAILURE);
598 }
599 } else if (!memdst) {
600 /* default output file is stdout */
601 output_file = write_stdout();
602 }
603
604 if (icc_filename != NULL) {
605 if ((icc_file = fopen(icc_filename, READ_BINARY)) == NULL) {
606 fprintf(stderr, "%s: can't open %s\n", progname, icc_filename);
607 exit(EXIT_FAILURE);
608 }
609 if (fseek(icc_file, 0, SEEK_END) < 0 ||
610 (icc_len = ftell(icc_file)) < 1 ||
611 fseek(icc_file, 0, SEEK_SET) < 0) {
612 fprintf(stderr, "%s: can't determine size of %s\n", progname,
613 icc_filename);
614 exit(EXIT_FAILURE);
615 }
616 if ((icc_profile = (JOCTET *)malloc(icc_len)) == NULL) {
617 fprintf(stderr, "%s: can't allocate memory for ICC profile\n", progname);
618 fclose(icc_file);
619 exit(EXIT_FAILURE);
620 }
621 if (fread(icc_profile, icc_len, 1, icc_file) < 1) {
622 fprintf(stderr, "%s: can't read ICC profile from %s\n", progname,
623 icc_filename);
624 free(icc_profile);
625 fclose(icc_file);
626 exit(EXIT_FAILURE);
627 }
628 fclose(icc_file);
629 }
630
631 #ifdef PROGRESS_REPORT
632 start_progress_monitor((j_common_ptr)&cinfo, &progress);
633 #endif
634
635 /* Figure out the input file format, and set up to read it. */
636 src_mgr = select_file_type(&cinfo, input_file);
637 src_mgr->input_file = input_file;
638
639 /* Read the input file header to obtain file size & colorspace. */
640 (*src_mgr->start_input) (&cinfo, src_mgr);
641
642 /* Now that we know input colorspace, fix colorspace-dependent defaults */
643 jpeg_default_colorspace(&cinfo);
644
645 /* Adjust default compression parameters by re-parsing the options */
646 file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
647
648 /* Specify data destination for compression */
649 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
650 if (memdst)
651 jpeg_mem_dest(&cinfo, &outbuffer, &outsize);
652 else
653 #endif
654 jpeg_stdio_dest(&cinfo, output_file);
655
656 /* Start compressor */
657 jpeg_start_compress(&cinfo, TRUE);
658
659 if (icc_profile != NULL)
660 jpeg_write_icc_profile(&cinfo, icc_profile, (unsigned int)icc_len);
661
662 /* Process data */
663 while (cinfo.next_scanline < cinfo.image_height) {
664 num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
665 (void)jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
666 }
667
668 /* Finish compression and release memory */
669 (*src_mgr->finish_input) (&cinfo, src_mgr);
670 jpeg_finish_compress(&cinfo);
671 jpeg_destroy_compress(&cinfo);
672
673 /* Close files, if we opened them */
674 if (input_file != stdin)
675 fclose(input_file);
676 if (output_file != stdout && output_file != NULL)
677 fclose(output_file);
678
679 #ifdef PROGRESS_REPORT
680 end_progress_monitor((j_common_ptr)&cinfo);
681 #endif
682
683 if (memdst) {
684 fprintf(stderr, "Compressed size: %lu bytes\n", outsize);
685 if (outbuffer != NULL)
686 free(outbuffer);
687 }
688
689 if (icc_profile != NULL)
690 free(icc_profile);
691
692 /* All done. */
693 exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
694 return 0; /* suppress no-return-value warnings */
695 }
696