Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * djpeg.c |
| 3 | * |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 4 | * Copyright (C) 1991-1997, Thomas G. Lane. |
DRC | 2cdd2ae | 2010-10-10 06:54:21 +0000 | [diff] [blame] | 5 | * Copyright (C) 2010, D. R. Commander. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 6 | * This file is part of the Independent JPEG Group's software. |
| 7 | * For conditions of distribution and use, see the accompanying README file. |
| 8 | * |
| 9 | * This file contains a command-line user interface for the JPEG decompressor. |
| 10 | * It should work on any system with Unix- or MS-DOS-style command lines. |
| 11 | * |
| 12 | * Two different command line styles are permitted, depending on the |
| 13 | * compile-time switch TWO_FILE_COMMANDLINE: |
| 14 | * djpeg [options] inputfile outputfile |
| 15 | * djpeg [options] [inputfile] |
| 16 | * In the second style, output is always to standard output, which you'd |
| 17 | * normally redirect to a file or pipe to some other program. Input is |
| 18 | * either from a named file or from standard input (typically redirected). |
| 19 | * The second style is convenient on Unix but is unhelpful on systems that |
| 20 | * don't support pipes. Also, you MUST use the first style if your system |
| 21 | * doesn't do binary I/O to stdin/stdout. |
| 22 | * To simplify script writing, the "-outfile" switch is provided. The syntax |
| 23 | * djpeg [options] -outfile outputfile inputfile |
| 24 | * works regardless of which command line style is used. |
| 25 | */ |
| 26 | |
| 27 | #include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 28 | #include "jversion.h" /* for version message */ |
DRC | 2cdd2ae | 2010-10-10 06:54:21 +0000 | [diff] [blame] | 29 | #include "config.h" |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 30 | |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 31 | #include <ctype.h> /* to declare isprint() */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 32 | |
| 33 | #ifdef USE_CCOMMAND /* command-line reader for Macintosh */ |
| 34 | #ifdef __MWERKS__ |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 35 | #include <SIOUX.h> /* Metrowerks needs this */ |
| 36 | #include <console.h> /* ... and this */ |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 37 | #endif |
| 38 | #ifdef THINK_C |
| 39 | #include <console.h> /* Think declares it here */ |
| 40 | #endif |
| 41 | #endif |
| 42 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 43 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 44 | /* Create the add-on message string table. */ |
| 45 | |
| 46 | #define JMESSAGE(code,string) string , |
| 47 | |
| 48 | static const char * const cdjpeg_message_table[] = { |
| 49 | #include "cderror.h" |
| 50 | NULL |
| 51 | }; |
| 52 | |
| 53 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 54 | /* |
| 55 | * This list defines the known output image formats |
| 56 | * (not all of which need be supported by a given version). |
| 57 | * You can change the default output format by defining DEFAULT_FMT; |
| 58 | * indeed, you had better do so if you undefine PPM_SUPPORTED. |
| 59 | */ |
| 60 | |
| 61 | typedef enum { |
| 62 | FMT_BMP, /* BMP format (Windows flavor) */ |
| 63 | FMT_GIF, /* GIF format */ |
| 64 | FMT_OS2, /* BMP format (OS/2 flavor) */ |
| 65 | FMT_PPM, /* PPM/PGM (PBMPLUS formats) */ |
| 66 | FMT_RLE, /* RLE format */ |
| 67 | FMT_TARGA, /* Targa format */ |
| 68 | FMT_TIFF /* TIFF format */ |
| 69 | } IMAGE_FORMATS; |
| 70 | |
| 71 | #ifndef DEFAULT_FMT /* so can override from CFLAGS in Makefile */ |
| 72 | #define DEFAULT_FMT FMT_PPM |
| 73 | #endif |
| 74 | |
| 75 | static IMAGE_FORMATS requested_fmt; |
| 76 | |
| 77 | |
| 78 | /* |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 79 | * Argument-parsing code. |
| 80 | * The switch parser is designed to be useful with DOS-style command line |
| 81 | * syntax, ie, intermixed switches and file names, where only the switches |
| 82 | * to the left of a given file name affect processing of that file. |
| 83 | * The main program in this file doesn't actually use this capability... |
| 84 | */ |
| 85 | |
| 86 | |
| 87 | static const char * progname; /* program name for error messages */ |
| 88 | static char * outfilename; /* for -outfile switch */ |
| 89 | |
| 90 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 91 | LOCAL(void) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 92 | usage (void) |
| 93 | /* complain about bad command line */ |
| 94 | { |
| 95 | fprintf(stderr, "usage: %s [switches] ", progname); |
| 96 | #ifdef TWO_FILE_COMMANDLINE |
| 97 | fprintf(stderr, "inputfile outputfile\n"); |
| 98 | #else |
| 99 | fprintf(stderr, "[inputfile]\n"); |
| 100 | #endif |
| 101 | |
| 102 | fprintf(stderr, "Switches (names may be abbreviated):\n"); |
| 103 | fprintf(stderr, " -colors N Reduce image to no more than N colors\n"); |
| 104 | fprintf(stderr, " -fast Fast, low-quality processing\n"); |
| 105 | fprintf(stderr, " -grayscale Force grayscale output\n"); |
| 106 | #ifdef IDCT_SCALING_SUPPORTED |
| 107 | fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n"); |
| 108 | #endif |
| 109 | #ifdef BMP_SUPPORTED |
| 110 | fprintf(stderr, " -bmp Select BMP output format (Windows style)%s\n", |
| 111 | (DEFAULT_FMT == FMT_BMP ? " (default)" : "")); |
| 112 | #endif |
| 113 | #ifdef GIF_SUPPORTED |
| 114 | fprintf(stderr, " -gif Select GIF output format%s\n", |
| 115 | (DEFAULT_FMT == FMT_GIF ? " (default)" : "")); |
| 116 | #endif |
| 117 | #ifdef BMP_SUPPORTED |
| 118 | fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\n", |
| 119 | (DEFAULT_FMT == FMT_OS2 ? " (default)" : "")); |
| 120 | #endif |
| 121 | #ifdef PPM_SUPPORTED |
| 122 | fprintf(stderr, " -pnm Select PBMPLUS (PPM/PGM) output format%s\n", |
| 123 | (DEFAULT_FMT == FMT_PPM ? " (default)" : "")); |
| 124 | #endif |
| 125 | #ifdef RLE_SUPPORTED |
| 126 | fprintf(stderr, " -rle Select Utah RLE output format%s\n", |
| 127 | (DEFAULT_FMT == FMT_RLE ? " (default)" : "")); |
| 128 | #endif |
| 129 | #ifdef TARGA_SUPPORTED |
| 130 | fprintf(stderr, " -targa Select Targa output format%s\n", |
| 131 | (DEFAULT_FMT == FMT_TARGA ? " (default)" : "")); |
| 132 | #endif |
| 133 | fprintf(stderr, "Switches for advanced users:\n"); |
| 134 | #ifdef DCT_ISLOW_SUPPORTED |
| 135 | fprintf(stderr, " -dct int Use integer DCT method%s\n", |
| 136 | (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : "")); |
| 137 | #endif |
| 138 | #ifdef DCT_IFAST_SUPPORTED |
| 139 | fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n", |
| 140 | (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : "")); |
| 141 | #endif |
| 142 | #ifdef DCT_FLOAT_SUPPORTED |
| 143 | fprintf(stderr, " -dct float Use floating-point DCT method%s\n", |
| 144 | (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : "")); |
| 145 | #endif |
| 146 | fprintf(stderr, " -dither fs Use F-S dithering (default)\n"); |
| 147 | fprintf(stderr, " -dither none Don't use dithering in quantization\n"); |
| 148 | fprintf(stderr, " -dither ordered Use ordered dither (medium speed, quality)\n"); |
| 149 | #ifdef QUANT_2PASS_SUPPORTED |
| 150 | fprintf(stderr, " -map FILE Map to colors used in named image file\n"); |
| 151 | #endif |
| 152 | fprintf(stderr, " -nosmooth Don't use high-quality upsampling\n"); |
| 153 | #ifdef QUANT_1PASS_SUPPORTED |
| 154 | fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\n"); |
| 155 | #endif |
| 156 | fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n"); |
| 157 | fprintf(stderr, " -outfile name Specify name for output file\n"); |
| 158 | fprintf(stderr, " -verbose or -debug Emit debug output\n"); |
| 159 | exit(EXIT_FAILURE); |
| 160 | } |
| 161 | |
| 162 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 163 | LOCAL(int) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 164 | parse_switches (j_decompress_ptr cinfo, int argc, char **argv, |
| 165 | int last_file_arg_seen, boolean for_real) |
| 166 | /* Parse optional switches. |
| 167 | * Returns argv[] index of first file-name argument (== argc if none). |
| 168 | * Any file names with indexes <= last_file_arg_seen are ignored; |
| 169 | * they have presumably been processed in a previous iteration. |
| 170 | * (Pass 0 for last_file_arg_seen on the first or only iteration.) |
| 171 | * for_real is FALSE on the first (dummy) pass; we may skip any expensive |
| 172 | * processing. |
| 173 | */ |
| 174 | { |
| 175 | int argn; |
| 176 | char * arg; |
| 177 | |
| 178 | /* Set up default JPEG parameters. */ |
| 179 | requested_fmt = DEFAULT_FMT; /* set default output file format */ |
| 180 | outfilename = NULL; |
| 181 | cinfo->err->trace_level = 0; |
| 182 | |
| 183 | /* Scan command line options, adjust parameters */ |
| 184 | |
| 185 | for (argn = 1; argn < argc; argn++) { |
| 186 | arg = argv[argn]; |
| 187 | if (*arg != '-') { |
| 188 | /* Not a switch, must be a file name argument */ |
| 189 | if (argn <= last_file_arg_seen) { |
| 190 | outfilename = NULL; /* -outfile applies to just one input file */ |
| 191 | continue; /* ignore this name if previously processed */ |
| 192 | } |
| 193 | break; /* else done parsing switches */ |
| 194 | } |
| 195 | arg++; /* advance past switch marker character */ |
| 196 | |
| 197 | if (keymatch(arg, "bmp", 1)) { |
| 198 | /* BMP output format. */ |
| 199 | requested_fmt = FMT_BMP; |
| 200 | |
| 201 | } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) || |
| 202 | keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) { |
| 203 | /* Do color quantization. */ |
| 204 | int val; |
| 205 | |
| 206 | if (++argn >= argc) /* advance to next argument */ |
| 207 | usage(); |
| 208 | if (sscanf(argv[argn], "%d", &val) != 1) |
| 209 | usage(); |
| 210 | cinfo->desired_number_of_colors = val; |
| 211 | cinfo->quantize_colors = TRUE; |
| 212 | |
| 213 | } else if (keymatch(arg, "dct", 2)) { |
| 214 | /* Select IDCT algorithm. */ |
| 215 | if (++argn >= argc) /* advance to next argument */ |
| 216 | usage(); |
| 217 | if (keymatch(argv[argn], "int", 1)) { |
| 218 | cinfo->dct_method = JDCT_ISLOW; |
| 219 | } else if (keymatch(argv[argn], "fast", 2)) { |
| 220 | cinfo->dct_method = JDCT_IFAST; |
| 221 | } else if (keymatch(argv[argn], "float", 2)) { |
| 222 | cinfo->dct_method = JDCT_FLOAT; |
| 223 | } else |
| 224 | usage(); |
| 225 | |
| 226 | } else if (keymatch(arg, "dither", 2)) { |
| 227 | /* Select dithering algorithm. */ |
| 228 | if (++argn >= argc) /* advance to next argument */ |
| 229 | usage(); |
| 230 | if (keymatch(argv[argn], "fs", 2)) { |
| 231 | cinfo->dither_mode = JDITHER_FS; |
| 232 | } else if (keymatch(argv[argn], "none", 2)) { |
| 233 | cinfo->dither_mode = JDITHER_NONE; |
| 234 | } else if (keymatch(argv[argn], "ordered", 2)) { |
| 235 | cinfo->dither_mode = JDITHER_ORDERED; |
| 236 | } else |
| 237 | usage(); |
| 238 | |
| 239 | } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) { |
| 240 | /* Enable debug printouts. */ |
| 241 | /* On first -d, print version identification */ |
| 242 | static boolean printed_version = FALSE; |
| 243 | |
| 244 | if (! printed_version) { |
DRC | 2cdd2ae | 2010-10-10 06:54:21 +0000 | [diff] [blame] | 245 | fprintf(stderr, "%s version %s (build %s)\n", |
| 246 | PACKAGE_NAME, VERSION, BUILD); |
| 247 | fprintf(stderr, "%s\n\n", LJTCOPYRIGHT); |
| 248 | fprintf(stderr, "Based on Independent JPEG Group's libjpeg, version %s\n%s\n\n", |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 249 | JVERSION, JCOPYRIGHT); |
| 250 | printed_version = TRUE; |
| 251 | } |
| 252 | cinfo->err->trace_level++; |
| 253 | |
| 254 | } else if (keymatch(arg, "fast", 1)) { |
| 255 | /* Select recommended processing options for quick-and-dirty output. */ |
| 256 | cinfo->two_pass_quantize = FALSE; |
| 257 | cinfo->dither_mode = JDITHER_ORDERED; |
| 258 | if (! cinfo->quantize_colors) /* don't override an earlier -colors */ |
| 259 | cinfo->desired_number_of_colors = 216; |
| 260 | cinfo->dct_method = JDCT_FASTEST; |
| 261 | cinfo->do_fancy_upsampling = FALSE; |
| 262 | |
| 263 | } else if (keymatch(arg, "gif", 1)) { |
| 264 | /* GIF output format. */ |
| 265 | requested_fmt = FMT_GIF; |
| 266 | |
| 267 | } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) { |
| 268 | /* Force monochrome output. */ |
| 269 | cinfo->out_color_space = JCS_GRAYSCALE; |
| 270 | |
| 271 | } else if (keymatch(arg, "map", 3)) { |
| 272 | /* Quantize to a color map taken from an input file. */ |
| 273 | if (++argn >= argc) /* advance to next argument */ |
| 274 | usage(); |
| 275 | if (for_real) { /* too expensive to do twice! */ |
| 276 | #ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */ |
| 277 | FILE * mapfile; |
| 278 | |
| 279 | if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) { |
| 280 | fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]); |
| 281 | exit(EXIT_FAILURE); |
| 282 | } |
| 283 | read_color_map(cinfo, mapfile); |
| 284 | fclose(mapfile); |
| 285 | cinfo->quantize_colors = TRUE; |
| 286 | #else |
| 287 | ERREXIT(cinfo, JERR_NOT_COMPILED); |
| 288 | #endif |
| 289 | } |
| 290 | |
| 291 | } else if (keymatch(arg, "maxmemory", 3)) { |
| 292 | /* Maximum memory in Kb (or Mb with 'm'). */ |
| 293 | long lval; |
| 294 | char ch = 'x'; |
| 295 | |
| 296 | if (++argn >= argc) /* advance to next argument */ |
| 297 | usage(); |
| 298 | if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1) |
| 299 | usage(); |
| 300 | if (ch == 'm' || ch == 'M') |
| 301 | lval *= 1000L; |
| 302 | cinfo->mem->max_memory_to_use = lval * 1000L; |
| 303 | |
| 304 | } else if (keymatch(arg, "nosmooth", 3)) { |
| 305 | /* Suppress fancy upsampling */ |
| 306 | cinfo->do_fancy_upsampling = FALSE; |
| 307 | |
| 308 | } else if (keymatch(arg, "onepass", 3)) { |
| 309 | /* Use fast one-pass quantization. */ |
| 310 | cinfo->two_pass_quantize = FALSE; |
| 311 | |
| 312 | } else if (keymatch(arg, "os2", 3)) { |
| 313 | /* BMP output format (OS/2 flavor). */ |
| 314 | requested_fmt = FMT_OS2; |
| 315 | |
| 316 | } else if (keymatch(arg, "outfile", 4)) { |
| 317 | /* Set output file name. */ |
| 318 | if (++argn >= argc) /* advance to next argument */ |
| 319 | usage(); |
| 320 | outfilename = argv[argn]; /* save it away for later use */ |
| 321 | |
| 322 | } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) { |
| 323 | /* PPM/PGM output format. */ |
| 324 | requested_fmt = FMT_PPM; |
| 325 | |
| 326 | } else if (keymatch(arg, "rle", 1)) { |
| 327 | /* RLE output format. */ |
| 328 | requested_fmt = FMT_RLE; |
| 329 | |
| 330 | } else if (keymatch(arg, "scale", 1)) { |
| 331 | /* Scale the output image by a fraction M/N. */ |
| 332 | if (++argn >= argc) /* advance to next argument */ |
| 333 | usage(); |
| 334 | if (sscanf(argv[argn], "%d/%d", |
| 335 | &cinfo->scale_num, &cinfo->scale_denom) != 2) |
| 336 | usage(); |
| 337 | |
| 338 | } else if (keymatch(arg, "targa", 1)) { |
| 339 | /* Targa output format. */ |
| 340 | requested_fmt = FMT_TARGA; |
| 341 | |
| 342 | } else { |
| 343 | usage(); /* bogus switch */ |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | return argn; /* return index of next arg (file name) */ |
| 348 | } |
| 349 | |
| 350 | |
| 351 | /* |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 352 | * Marker processor for COM and interesting APPn markers. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 353 | * This replaces the library's built-in processor, which just skips the marker. |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 354 | * We want to print out the marker as text, to the extent possible. |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 355 | * Note this code relies on a non-suspending data source. |
| 356 | */ |
| 357 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 358 | LOCAL(unsigned int) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 359 | jpeg_getc (j_decompress_ptr cinfo) |
| 360 | /* Read next byte */ |
| 361 | { |
| 362 | struct jpeg_source_mgr * datasrc = cinfo->src; |
| 363 | |
| 364 | if (datasrc->bytes_in_buffer == 0) { |
| 365 | if (! (*datasrc->fill_input_buffer) (cinfo)) |
| 366 | ERREXIT(cinfo, JERR_CANT_SUSPEND); |
| 367 | } |
| 368 | datasrc->bytes_in_buffer--; |
| 369 | return GETJOCTET(*datasrc->next_input_byte++); |
| 370 | } |
| 371 | |
| 372 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 373 | METHODDEF(boolean) |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 374 | print_text_marker (j_decompress_ptr cinfo) |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 375 | { |
| 376 | boolean traceit = (cinfo->err->trace_level >= 1); |
| 377 | INT32 length; |
| 378 | unsigned int ch; |
| 379 | unsigned int lastch = 0; |
| 380 | |
| 381 | length = jpeg_getc(cinfo) << 8; |
| 382 | length += jpeg_getc(cinfo); |
| 383 | length -= 2; /* discount the length word itself */ |
| 384 | |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 385 | if (traceit) { |
| 386 | if (cinfo->unread_marker == JPEG_COM) |
| 387 | fprintf(stderr, "Comment, length %ld:\n", (long) length); |
| 388 | else /* assume it is an APPn otherwise */ |
| 389 | fprintf(stderr, "APP%d, length %ld:\n", |
| 390 | cinfo->unread_marker - JPEG_APP0, (long) length); |
| 391 | } |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 392 | |
| 393 | while (--length >= 0) { |
| 394 | ch = jpeg_getc(cinfo); |
| 395 | if (traceit) { |
| 396 | /* Emit the character in a readable form. |
| 397 | * Nonprintables are converted to \nnn form, |
| 398 | * while \ is converted to \\. |
| 399 | * Newlines in CR, CR/LF, or LF form will be printed as one newline. |
| 400 | */ |
| 401 | if (ch == '\r') { |
| 402 | fprintf(stderr, "\n"); |
| 403 | } else if (ch == '\n') { |
| 404 | if (lastch != '\r') |
| 405 | fprintf(stderr, "\n"); |
| 406 | } else if (ch == '\\') { |
| 407 | fprintf(stderr, "\\\\"); |
| 408 | } else if (isprint(ch)) { |
| 409 | putc(ch, stderr); |
| 410 | } else { |
| 411 | fprintf(stderr, "\\%03o", ch); |
| 412 | } |
| 413 | lastch = ch; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | if (traceit) |
| 418 | fprintf(stderr, "\n"); |
| 419 | |
| 420 | return TRUE; |
| 421 | } |
| 422 | |
| 423 | |
| 424 | /* |
| 425 | * The main program. |
| 426 | */ |
| 427 | |
Thomas G. Lane | 489583f | 1996-02-07 00:00:00 +0000 | [diff] [blame] | 428 | int |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 429 | main (int argc, char **argv) |
| 430 | { |
| 431 | struct jpeg_decompress_struct cinfo; |
| 432 | struct jpeg_error_mgr jerr; |
| 433 | #ifdef PROGRESS_REPORT |
| 434 | struct cdjpeg_progress_mgr progress; |
| 435 | #endif |
| 436 | int file_index; |
| 437 | djpeg_dest_ptr dest_mgr = NULL; |
| 438 | FILE * input_file; |
| 439 | FILE * output_file; |
| 440 | JDIMENSION num_scanlines; |
| 441 | |
| 442 | /* On Mac, fetch a command line. */ |
| 443 | #ifdef USE_CCOMMAND |
| 444 | argc = ccommand(&argv); |
| 445 | #endif |
| 446 | |
| 447 | progname = argv[0]; |
| 448 | if (progname == NULL || progname[0] == 0) |
| 449 | progname = "djpeg"; /* in case C library doesn't provide it */ |
| 450 | |
| 451 | /* Initialize the JPEG decompression object with default error handling. */ |
| 452 | cinfo.err = jpeg_std_error(&jerr); |
| 453 | jpeg_create_decompress(&cinfo); |
| 454 | /* Add some application-specific error messages (from cderror.h) */ |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 455 | jerr.addon_message_table = cdjpeg_message_table; |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 456 | jerr.first_addon_message = JMSG_FIRSTADDONCODE; |
| 457 | jerr.last_addon_message = JMSG_LASTADDONCODE; |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 458 | |
| 459 | /* Insert custom marker processor for COM and APP12. |
| 460 | * APP12 is used by some digital camera makers for textual info, |
| 461 | * so we provide the ability to display it as text. |
| 462 | * If you like, additional APPn marker types can be selected for display, |
DRC | 39ea562 | 2010-10-12 01:55:31 +0000 | [diff] [blame] | 463 | * but don't try to override APP0 or APP14 this way (see libjpeg.txt). |
Thomas G. Lane | 5ead57a | 1998-03-27 00:00:00 +0000 | [diff] [blame] | 464 | */ |
| 465 | jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker); |
| 466 | jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 467 | |
| 468 | /* Now safe to enable signal catcher. */ |
| 469 | #ifdef NEED_SIGNAL_CATCHER |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 470 | enable_signal_catcher((j_common_ptr) &cinfo); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 471 | #endif |
| 472 | |
| 473 | /* Scan command line to find file names. */ |
| 474 | /* It is convenient to use just one switch-parsing routine, but the switch |
| 475 | * values read here are ignored; we will rescan the switches after opening |
| 476 | * the input file. |
| 477 | * (Exception: tracing level set here controls verbosity for COM markers |
| 478 | * found during jpeg_read_header...) |
| 479 | */ |
| 480 | |
| 481 | file_index = parse_switches(&cinfo, argc, argv, 0, FALSE); |
| 482 | |
| 483 | #ifdef TWO_FILE_COMMANDLINE |
| 484 | /* Must have either -outfile switch or explicit output file name */ |
| 485 | if (outfilename == NULL) { |
| 486 | if (file_index != argc-2) { |
| 487 | fprintf(stderr, "%s: must name one input and one output file\n", |
| 488 | progname); |
| 489 | usage(); |
| 490 | } |
| 491 | outfilename = argv[file_index+1]; |
| 492 | } else { |
| 493 | if (file_index != argc-1) { |
| 494 | fprintf(stderr, "%s: must name one input and one output file\n", |
| 495 | progname); |
| 496 | usage(); |
| 497 | } |
| 498 | } |
| 499 | #else |
| 500 | /* Unix style: expect zero or one file name */ |
| 501 | if (file_index < argc-1) { |
| 502 | fprintf(stderr, "%s: only one input file\n", progname); |
| 503 | usage(); |
| 504 | } |
| 505 | #endif /* TWO_FILE_COMMANDLINE */ |
| 506 | |
| 507 | /* Open the input file. */ |
| 508 | if (file_index < argc) { |
| 509 | if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) { |
| 510 | fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]); |
| 511 | exit(EXIT_FAILURE); |
| 512 | } |
| 513 | } else { |
| 514 | /* default input file is stdin */ |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 515 | input_file = read_stdin(); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | /* Open the output file. */ |
| 519 | if (outfilename != NULL) { |
| 520 | if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) { |
| 521 | fprintf(stderr, "%s: can't open %s\n", progname, outfilename); |
| 522 | exit(EXIT_FAILURE); |
| 523 | } |
| 524 | } else { |
| 525 | /* default output file is stdout */ |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 526 | output_file = write_stdout(); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | #ifdef PROGRESS_REPORT |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 530 | start_progress_monitor((j_common_ptr) &cinfo, &progress); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 531 | #endif |
| 532 | |
| 533 | /* Specify data source for decompression */ |
| 534 | jpeg_stdio_src(&cinfo, input_file); |
| 535 | |
| 536 | /* Read file header, set default decompression parameters */ |
| 537 | (void) jpeg_read_header(&cinfo, TRUE); |
| 538 | |
| 539 | /* Adjust default decompression parameters by re-parsing the options */ |
| 540 | file_index = parse_switches(&cinfo, argc, argv, 0, TRUE); |
| 541 | |
| 542 | /* Initialize the output module now to let it override any crucial |
| 543 | * option settings (for instance, GIF wants to force color quantization). |
| 544 | */ |
| 545 | switch (requested_fmt) { |
| 546 | #ifdef BMP_SUPPORTED |
| 547 | case FMT_BMP: |
| 548 | dest_mgr = jinit_write_bmp(&cinfo, FALSE); |
| 549 | break; |
| 550 | case FMT_OS2: |
| 551 | dest_mgr = jinit_write_bmp(&cinfo, TRUE); |
| 552 | break; |
| 553 | #endif |
| 554 | #ifdef GIF_SUPPORTED |
| 555 | case FMT_GIF: |
| 556 | dest_mgr = jinit_write_gif(&cinfo); |
| 557 | break; |
| 558 | #endif |
| 559 | #ifdef PPM_SUPPORTED |
| 560 | case FMT_PPM: |
| 561 | dest_mgr = jinit_write_ppm(&cinfo); |
| 562 | break; |
| 563 | #endif |
| 564 | #ifdef RLE_SUPPORTED |
| 565 | case FMT_RLE: |
| 566 | dest_mgr = jinit_write_rle(&cinfo); |
| 567 | break; |
| 568 | #endif |
| 569 | #ifdef TARGA_SUPPORTED |
| 570 | case FMT_TARGA: |
| 571 | dest_mgr = jinit_write_targa(&cinfo); |
| 572 | break; |
| 573 | #endif |
| 574 | default: |
| 575 | ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT); |
| 576 | break; |
| 577 | } |
| 578 | dest_mgr->output_file = output_file; |
| 579 | |
| 580 | /* Start decompressor */ |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 581 | (void) jpeg_start_decompress(&cinfo); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 582 | |
| 583 | /* Write output file header */ |
| 584 | (*dest_mgr->start_output) (&cinfo, dest_mgr); |
| 585 | |
| 586 | /* Process data */ |
| 587 | while (cinfo.output_scanline < cinfo.output_height) { |
| 588 | num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer, |
| 589 | dest_mgr->buffer_height); |
| 590 | (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines); |
| 591 | } |
| 592 | |
| 593 | #ifdef PROGRESS_REPORT |
| 594 | /* Hack: count final pass as done in case finish_output does an extra pass. |
| 595 | * The library won't have updated completed_passes. |
| 596 | */ |
| 597 | progress.pub.completed_passes = progress.pub.total_passes; |
| 598 | #endif |
| 599 | |
| 600 | /* Finish decompression and release memory. |
| 601 | * I must do it in this order because output module has allocated memory |
| 602 | * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory. |
| 603 | */ |
| 604 | (*dest_mgr->finish_output) (&cinfo, dest_mgr); |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 605 | (void) jpeg_finish_decompress(&cinfo); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 606 | jpeg_destroy_decompress(&cinfo); |
| 607 | |
Thomas G. Lane | 9ba2f5e | 1994-12-07 00:00:00 +0000 | [diff] [blame] | 608 | /* Close files, if we opened them */ |
| 609 | if (input_file != stdin) |
| 610 | fclose(input_file); |
| 611 | if (output_file != stdout) |
| 612 | fclose(output_file); |
| 613 | |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 614 | #ifdef PROGRESS_REPORT |
Thomas G. Lane | bc79e06 | 1995-08-02 00:00:00 +0000 | [diff] [blame] | 615 | end_progress_monitor((j_common_ptr) &cinfo); |
Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame] | 616 | #endif |
| 617 | |
| 618 | /* All done. */ |
| 619 | exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS); |
| 620 | return 0; /* suppress no-return-value warnings */ |
| 621 | } |