SAMV71 Xplained Ultra Software Package 1.4

djpeg.c

00001 /*
00002  * djpeg.c
00003  *
00004  * Copyright (C) 1991-1997, Thomas G. Lane.
00005  * Modified 2009 by Guido Vollbeding.
00006  * This file is part of the Independent JPEG Group's software.
00007  * For conditions of distribution and use, see the accompanying README file.
00008  *
00009  * This file contains a command-line user interface for the JPEG decompressor.
00010  * It should work on any system with Unix- or MS-DOS-style command lines.
00011  *
00012  * Two different command line styles are permitted, depending on the
00013  * compile-time switch TWO_FILE_COMMANDLINE:
00014  *  djpeg [options]  inputfile outputfile
00015  *  djpeg [options]  [inputfile]
00016  * In the second style, output is always to standard output, which you'd
00017  * normally redirect to a file or pipe to some other program.  Input is
00018  * either from a named file or from standard input (typically redirected).
00019  * The second style is convenient on Unix but is unhelpful on systems that
00020  * don't support pipes.  Also, you MUST use the first style if your system
00021  * doesn't do binary I/O to stdin/stdout.
00022  * To simplify script writing, the "-outfile" switch is provided.  The syntax
00023  *  djpeg [options]  -outfile outputfile  inputfile
00024  * works regardless of which command line style is used.
00025  */
00026 
00027 #include "cdjpeg.h"     /* Common decls for cjpeg/djpeg applications */
00028 #include "jversion.h"       /* for version message */
00029 
00030 #include <ctype.h>      /* to declare isprint() */
00031 
00032 #ifdef USE_CCOMMAND     /* command-line reader for Macintosh */
00033 #ifdef __MWERKS__
00034 #include <SIOUX.h>              /* Metrowerks needs this */
00035 #include <console.h>        /* ... and this */
00036 #endif
00037 #ifdef THINK_C
00038 #include <console.h>        /* Think declares it here */
00039 #endif
00040 #endif
00041 
00042 
00043 /* Create the add-on message string table. */
00044 
00045 #define JMESSAGE(code,string)   string ,
00046 
00047 static const char * const cdjpeg_message_table[] = {
00048 #include "cderror.h"
00049   NULL
00050 };
00051 
00052 
00053 /*
00054  * This list defines the known output image formats
00055  * (not all of which need be supported by a given version).
00056  * You can change the default output format by defining DEFAULT_FMT;
00057  * indeed, you had better do so if you undefine PPM_SUPPORTED.
00058  */
00059 
00060 typedef enum {
00061     FMT_BMP,        /* BMP format (Windows flavor) */
00062     FMT_GIF,        /* GIF format */
00063     FMT_OS2,        /* BMP format (OS/2 flavor) */
00064     FMT_PPM,        /* PPM/PGM (PBMPLUS formats) */
00065     FMT_RLE,        /* RLE format */
00066     FMT_TARGA,      /* Targa format */
00067     FMT_TIFF        /* TIFF format */
00068 } IMAGE_FORMATS;
00069 
00070 #ifndef DEFAULT_FMT     /* so can override from CFLAGS in Makefile */
00071 #define DEFAULT_FMT FMT_PPM
00072 #endif
00073 
00074 static IMAGE_FORMATS requested_fmt;
00075 
00076 
00077 /*
00078  * Argument-parsing code.
00079  * The switch parser is designed to be useful with DOS-style command line
00080  * syntax, ie, intermixed switches and file names, where only the switches
00081  * to the left of a given file name affect processing of that file.
00082  * The main program in this file doesn't actually use this capability...
00083  */
00084 
00085 
00086 static const char * progname;   /* program name for error messages */
00087 static char * outfilename;  /* for -outfile switch */
00088 
00089 
00090 LOCAL(void)
00091 usage (void)
00092 /* complain about bad command line */
00093 {
00094   fprintf(stderr, "usage: %s [switches] ", progname);
00095 #ifdef TWO_FILE_COMMANDLINE
00096   fprintf(stderr, "inputfile outputfile\n");
00097 #else
00098   fprintf(stderr, "[inputfile]\n");
00099 #endif
00100 
00101   fprintf(stderr, "Switches (names may be abbreviated):\n");
00102   fprintf(stderr, "  -colors N      Reduce image to no more than N colors\n");
00103   fprintf(stderr, "  -fast          Fast, low-quality processing\n");
00104   fprintf(stderr, "  -grayscale     Force grayscale output\n");
00105 #ifdef IDCT_SCALING_SUPPORTED
00106   fprintf(stderr, "  -scale M/N     Scale output image by fraction M/N, eg, 1/8\n");
00107 #endif
00108 #ifdef BMP_SUPPORTED
00109   fprintf(stderr, "  -bmp           Select BMP output format (Windows style)%s\n",
00110       (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
00111 #endif
00112 #ifdef GIF_SUPPORTED
00113   fprintf(stderr, "  -gif           Select GIF output format%s\n",
00114       (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
00115 #endif
00116 #ifdef BMP_SUPPORTED
00117   fprintf(stderr, "  -os2           Select BMP output format (OS/2 style)%s\n",
00118       (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
00119 #endif
00120 #ifdef PPM_SUPPORTED
00121   fprintf(stderr, "  -pnm           Select PBMPLUS (PPM/PGM) output format%s\n",
00122       (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
00123 #endif
00124 #ifdef RLE_SUPPORTED
00125   fprintf(stderr, "  -rle           Select Utah RLE output format%s\n",
00126       (DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
00127 #endif
00128 #ifdef TARGA_SUPPORTED
00129   fprintf(stderr, "  -targa         Select Targa output format%s\n",
00130       (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
00131 #endif
00132   fprintf(stderr, "Switches for advanced users:\n");
00133 #ifdef DCT_ISLOW_SUPPORTED
00134   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",
00135       (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
00136 #endif
00137 #ifdef DCT_IFAST_SUPPORTED
00138   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",
00139       (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
00140 #endif
00141 #ifdef DCT_FLOAT_SUPPORTED
00142   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",
00143       (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
00144 #endif
00145   fprintf(stderr, "  -dither fs     Use F-S dithering (default)\n");
00146   fprintf(stderr, "  -dither none   Don't use dithering in quantization\n");
00147   fprintf(stderr, "  -dither ordered  Use ordered dither (medium speed, quality)\n");
00148 #ifdef QUANT_2PASS_SUPPORTED
00149   fprintf(stderr, "  -map FILE      Map to colors used in named image file\n");
00150 #endif
00151   fprintf(stderr, "  -nosmooth      Don't use high-quality upsampling\n");
00152 #ifdef QUANT_1PASS_SUPPORTED
00153   fprintf(stderr, "  -onepass       Use 1-pass quantization (fast, low quality)\n");
00154 #endif
00155   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
00156   fprintf(stderr, "  -outfile name  Specify name for output file\n");
00157   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
00158   exit(EXIT_FAILURE);
00159 }
00160 
00161 
00162 LOCAL(int)
00163 parse_switches (j_decompress_ptr cinfo, int argc, char **argv,
00164         int last_file_arg_seen, boolean for_real)
00165 /* Parse optional switches.
00166  * Returns argv[] index of first file-name argument (== argc if none).
00167  * Any file names with indexes <= last_file_arg_seen are ignored;
00168  * they have presumably been processed in a previous iteration.
00169  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
00170  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
00171  * processing.
00172  */
00173 {
00174   int argn;
00175   char * arg;
00176 
00177   /* Set up default JPEG parameters. */
00178   requested_fmt = DEFAULT_FMT;  /* set default output file format */
00179   outfilename = NULL;
00180   cinfo->err->trace_level = 0;
00181 
00182   /* Scan command line options, adjust parameters */
00183 
00184   for (argn = 1; argn < argc; argn++) {
00185     arg = argv[argn];
00186     if (*arg != '-') {
00187       /* Not a switch, must be a file name argument */
00188       if (argn <= last_file_arg_seen) {
00189     outfilename = NULL; /* -outfile applies to just one input file */
00190     continue;       /* ignore this name if previously processed */
00191       }
00192       break;            /* else done parsing switches */
00193     }
00194     arg++;          /* advance past switch marker character */
00195 
00196     if (keymatch(arg, "bmp", 1)) {
00197       /* BMP output format. */
00198       requested_fmt = FMT_BMP;
00199 
00200     } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
00201            keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
00202       /* Do color quantization. */
00203       int val;
00204 
00205       if (++argn >= argc)   /* advance to next argument */
00206     usage();
00207       if (sscanf(argv[argn], "%d", &val) != 1)
00208     usage();
00209       cinfo->desired_number_of_colors = val;
00210       cinfo->quantize_colors = TRUE;
00211 
00212     } else if (keymatch(arg, "dct", 2)) {
00213       /* Select IDCT algorithm. */
00214       if (++argn >= argc)   /* advance to next argument */
00215     usage();
00216       if (keymatch(argv[argn], "int", 1)) {
00217     cinfo->dct_method = JDCT_ISLOW;
00218       } else if (keymatch(argv[argn], "fast", 2)) {
00219     cinfo->dct_method = JDCT_IFAST;
00220       } else if (keymatch(argv[argn], "float", 2)) {
00221     cinfo->dct_method = JDCT_FLOAT;
00222       } else
00223     usage();
00224 
00225     } else if (keymatch(arg, "dither", 2)) {
00226       /* Select dithering algorithm. */
00227       if (++argn >= argc)   /* advance to next argument */
00228     usage();
00229       if (keymatch(argv[argn], "fs", 2)) {
00230     cinfo->dither_mode = JDITHER_FS;
00231       } else if (keymatch(argv[argn], "none", 2)) {
00232     cinfo->dither_mode = JDITHER_NONE;
00233       } else if (keymatch(argv[argn], "ordered", 2)) {
00234     cinfo->dither_mode = JDITHER_ORDERED;
00235       } else
00236     usage();
00237 
00238     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
00239       /* Enable debug printouts. */
00240       /* On first -d, print version identification */
00241       static boolean printed_version = FALSE;
00242 
00243       if (! printed_version) {
00244     fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
00245         JVERSION, JCOPYRIGHT);
00246     printed_version = TRUE;
00247       }
00248       cinfo->err->trace_level++;
00249 
00250     } else if (keymatch(arg, "fast", 1)) {
00251       /* Select recommended processing options for quick-and-dirty output. */
00252       cinfo->two_pass_quantize = FALSE;
00253       cinfo->dither_mode = JDITHER_ORDERED;
00254       if (! cinfo->quantize_colors) /* don't override an earlier -colors */
00255     cinfo->desired_number_of_colors = 216;
00256       cinfo->dct_method = JDCT_FASTEST;
00257       cinfo->do_fancy_upsampling = FALSE;
00258 
00259     } else if (keymatch(arg, "gif", 1)) {
00260       /* GIF output format. */
00261       requested_fmt = FMT_GIF;
00262 
00263     } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
00264       /* Force monochrome output. */
00265       cinfo->out_color_space = JCS_GRAYSCALE;
00266 
00267     } else if (keymatch(arg, "map", 3)) {
00268       /* Quantize to a color map taken from an input file. */
00269       if (++argn >= argc)   /* advance to next argument */
00270     usage();
00271       if (for_real) {       /* too expensive to do twice! */
00272 #ifdef QUANT_2PASS_SUPPORTED    /* otherwise can't quantize to supplied map */
00273     FILE * mapfile;
00274 
00275     if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
00276       fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
00277       exit(EXIT_FAILURE);
00278     }
00279     read_color_map(cinfo, mapfile);
00280     fclose(mapfile);
00281     cinfo->quantize_colors = TRUE;
00282 #else
00283     ERREXIT(cinfo, JERR_NOT_COMPILED);
00284 #endif
00285       }
00286 
00287     } else if (keymatch(arg, "maxmemory", 3)) {
00288       /* Maximum memory in Kb (or Mb with 'm'). */
00289       long lval;
00290       char ch = 'x';
00291 
00292       if (++argn >= argc)   /* advance to next argument */
00293     usage();
00294       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
00295     usage();
00296       if (ch == 'm' || ch == 'M')
00297     lval *= 1000L;
00298       cinfo->mem->max_memory_to_use = lval * 1000L;
00299 
00300     } else if (keymatch(arg, "nosmooth", 3)) {
00301       /* Suppress fancy upsampling */
00302       cinfo->do_fancy_upsampling = FALSE;
00303 
00304     } else if (keymatch(arg, "onepass", 3)) {
00305       /* Use fast one-pass quantization. */
00306       cinfo->two_pass_quantize = FALSE;
00307 
00308     } else if (keymatch(arg, "os2", 3)) {
00309       /* BMP output format (OS/2 flavor). */
00310       requested_fmt = FMT_OS2;
00311 
00312     } else if (keymatch(arg, "outfile", 4)) {
00313       /* Set output file name. */
00314       if (++argn >= argc)   /* advance to next argument */
00315     usage();
00316       outfilename = argv[argn]; /* save it away for later use */
00317 
00318     } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
00319       /* PPM/PGM output format. */
00320       requested_fmt = FMT_PPM;
00321 
00322     } else if (keymatch(arg, "rle", 1)) {
00323       /* RLE output format. */
00324       requested_fmt = FMT_RLE;
00325 
00326     } else if (keymatch(arg, "scale", 1)) {
00327       /* Scale the output image by a fraction M/N. */
00328       if (++argn >= argc)   /* advance to next argument */
00329     usage();
00330       if (sscanf(argv[argn], "%d/%d",
00331          &cinfo->scale_num, &cinfo->scale_denom) < 1)
00332     usage();
00333 
00334     } else if (keymatch(arg, "targa", 1)) {
00335       /* Targa output format. */
00336       requested_fmt = FMT_TARGA;
00337 
00338     } else {
00339       usage();          /* bogus switch */
00340     }
00341   }
00342 
00343   return argn;          /* return index of next arg (file name) */
00344 }
00345 
00346 
00347 /*
00348  * Marker processor for COM and interesting APPn markers.
00349  * This replaces the library's built-in processor, which just skips the marker.
00350  * We want to print out the marker as text, to the extent possible.
00351  * Note this code relies on a non-suspending data source.
00352  */
00353 
00354 LOCAL(unsigned int)
00355 jpeg_getc (j_decompress_ptr cinfo)
00356 /* Read next byte */
00357 {
00358   struct jpeg_source_mgr * datasrc = cinfo->src;
00359 
00360   if (datasrc->bytes_in_buffer == 0) {
00361     if (! (*datasrc->fill_input_buffer) (cinfo))
00362       ERREXIT(cinfo, JERR_CANT_SUSPEND);
00363   }
00364   datasrc->bytes_in_buffer--;
00365   return GETJOCTET(*datasrc->next_input_byte++);
00366 }
00367 
00368 
00369 METHODDEF(boolean)
00370 print_text_marker (j_decompress_ptr cinfo)
00371 {
00372   boolean traceit = (cinfo->err->trace_level >= 1);
00373   INT32 length;
00374   unsigned int ch;
00375   unsigned int lastch = 0;
00376 
00377   length = jpeg_getc(cinfo) << 8;
00378   length += jpeg_getc(cinfo);
00379   length -= 2;          /* discount the length word itself */
00380 
00381   if (traceit) {
00382     if (cinfo->unread_marker == JPEG_COM)
00383       fprintf(stderr, "Comment, length %ld:\n", (long) length);
00384     else            /* assume it is an APPn otherwise */
00385       fprintf(stderr, "APP%d, length %ld:\n",
00386           cinfo->unread_marker - JPEG_APP0, (long) length);
00387   }
00388 
00389   while (--length >= 0) {
00390     ch = jpeg_getc(cinfo);
00391     if (traceit) {
00392       /* Emit the character in a readable form.
00393        * Nonprintables are converted to \nnn form,
00394        * while \ is converted to \\.
00395        * Newlines in CR, CR/LF, or LF form will be printed as one newline.
00396        */
00397       if (ch == '\r') {
00398     fprintf(stderr, "\n");
00399       } else if (ch == '\n') {
00400     if (lastch != '\r')
00401       fprintf(stderr, "\n");
00402       } else if (ch == '\\') {
00403     fprintf(stderr, "\\\\");
00404       } else if (isprint(ch)) {
00405     putc(ch, stderr);
00406       } else {
00407     fprintf(stderr, "\\%03o", ch);
00408       }
00409       lastch = ch;
00410     }
00411   }
00412 
00413   if (traceit)
00414     fprintf(stderr, "\n");
00415 
00416   return TRUE;
00417 }
00418 
00419 
00420 /*
00421  * The main program.
00422  */
00423 
00424 int
00425 main (int argc, char **argv)
00426 {
00427   struct jpeg_decompress_struct cinfo;
00428   struct jpeg_error_mgr jerr;
00429 #ifdef PROGRESS_REPORT
00430   struct cdjpeg_progress_mgr progress;
00431 #endif
00432   int file_index;
00433   djpeg_dest_ptr dest_mgr = NULL;
00434   FILE * input_file;
00435   FILE * output_file;
00436   JDIMENSION num_scanlines;
00437 
00438   /* On Mac, fetch a command line. */
00439 #ifdef USE_CCOMMAND
00440   argc = ccommand(&argv);
00441 #endif
00442 
00443   progname = argv[0];
00444   if (progname == NULL || progname[0] == 0)
00445     progname = "djpeg";     /* in case C library doesn't provide it */
00446 
00447   /* Initialize the JPEG decompression object with default error handling. */
00448   cinfo.err = jpeg_std_error(&jerr);
00449   jpeg_create_decompress(&cinfo);
00450   /* Add some application-specific error messages (from cderror.h) */
00451   jerr.addon_message_table = cdjpeg_message_table;
00452   jerr.first_addon_message = JMSG_FIRSTADDONCODE;
00453   jerr.last_addon_message = JMSG_LASTADDONCODE;
00454 
00455   /* Insert custom marker processor for COM and APP12.
00456    * APP12 is used by some digital camera makers for textual info,
00457    * so we provide the ability to display it as text.
00458    * If you like, additional APPn marker types can be selected for display,
00459    * but don't try to override APP0 or APP14 this way (see libjpeg.doc).
00460    */
00461   jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
00462   jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
00463 
00464   /* Now safe to enable signal catcher. */
00465 #ifdef NEED_SIGNAL_CATCHER
00466   enable_signal_catcher((j_common_ptr) &cinfo);
00467 #endif
00468 
00469   /* Scan command line to find file names. */
00470   /* It is convenient to use just one switch-parsing routine, but the switch
00471    * values read here are ignored; we will rescan the switches after opening
00472    * the input file.
00473    * (Exception: tracing level set here controls verbosity for COM markers
00474    * found during jpeg_read_header...)
00475    */
00476 
00477   file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
00478 
00479 #ifdef TWO_FILE_COMMANDLINE
00480   /* Must have either -outfile switch or explicit output file name */
00481   if (outfilename == NULL) {
00482     if (file_index != argc-2) {
00483       fprintf(stderr, "%s: must name one input and one output file\n",
00484           progname);
00485       usage();
00486     }
00487     outfilename = argv[file_index+1];
00488   } else {
00489     if (file_index != argc-1) {
00490       fprintf(stderr, "%s: must name one input and one output file\n",
00491           progname);
00492       usage();
00493     }
00494   }
00495 #else
00496   /* Unix style: expect zero or one file name */
00497   if (file_index < argc-1) {
00498     fprintf(stderr, "%s: only one input file\n", progname);
00499     usage();
00500   }
00501 #endif /* TWO_FILE_COMMANDLINE */
00502 
00503   /* Open the input file. */
00504   if (file_index < argc) {
00505     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
00506       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
00507       exit(EXIT_FAILURE);
00508     }
00509   } else {
00510     /* default input file is stdin */
00511     input_file = read_stdin();
00512   }
00513 
00514   /* Open the output file. */
00515   if (outfilename != NULL) {
00516     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
00517       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
00518       exit(EXIT_FAILURE);
00519     }
00520   } else {
00521     /* default output file is stdout */
00522     output_file = write_stdout();
00523   }
00524 
00525 #ifdef PROGRESS_REPORT
00526   start_progress_monitor((j_common_ptr) &cinfo, &progress);
00527 #endif
00528 
00529   /* Specify data source for decompression */
00530   jpeg_stdio_src(&cinfo, input_file);
00531 
00532   /* Read file header, set default decompression parameters */
00533   (void) jpeg_read_header(&cinfo, TRUE);
00534 
00535   /* Adjust default decompression parameters by re-parsing the options */
00536   file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
00537 
00538   /* Initialize the output module now to let it override any crucial
00539    * option settings (for instance, GIF wants to force color quantization).
00540    */
00541   switch (requested_fmt) {
00542 #ifdef BMP_SUPPORTED
00543   case FMT_BMP:
00544     dest_mgr = jinit_write_bmp(&cinfo, FALSE);
00545     break;
00546   case FMT_OS2:
00547     dest_mgr = jinit_write_bmp(&cinfo, TRUE);
00548     break;
00549 #endif
00550 #ifdef GIF_SUPPORTED
00551   case FMT_GIF:
00552     dest_mgr = jinit_write_gif(&cinfo);
00553     break;
00554 #endif
00555 #ifdef PPM_SUPPORTED
00556   case FMT_PPM:
00557     dest_mgr = jinit_write_ppm(&cinfo);
00558     break;
00559 #endif
00560 #ifdef RLE_SUPPORTED
00561   case FMT_RLE:
00562     dest_mgr = jinit_write_rle(&cinfo);
00563     break;
00564 #endif
00565 #ifdef TARGA_SUPPORTED
00566   case FMT_TARGA:
00567     dest_mgr = jinit_write_targa(&cinfo);
00568     break;
00569 #endif
00570   default:
00571     ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
00572     break;
00573   }
00574   dest_mgr->output_file = output_file;
00575 
00576   /* Start decompressor */
00577   (void) jpeg_start_decompress(&cinfo);
00578 
00579   /* Write output file header */
00580   (*dest_mgr->start_output) (&cinfo, dest_mgr);
00581 
00582   /* Process data */
00583   while (cinfo.output_scanline < cinfo.output_height) {
00584     num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
00585                     dest_mgr->buffer_height);
00586     (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
00587   }
00588 
00589 #ifdef PROGRESS_REPORT
00590   /* Hack: count final pass as done in case finish_output does an extra pass.
00591    * The library won't have updated completed_passes.
00592    */
00593   progress.pub.completed_passes = progress.pub.total_passes;
00594 #endif
00595 
00596   /* Finish decompression and release memory.
00597    * I must do it in this order because output module has allocated memory
00598    * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
00599    */
00600   (*dest_mgr->finish_output) (&cinfo, dest_mgr);
00601   (void) jpeg_finish_decompress(&cinfo);
00602   jpeg_destroy_decompress(&cinfo);
00603 
00604   /* Close files, if we opened them */
00605   if (input_file != stdin)
00606     fclose(input_file);
00607   if (output_file != stdout)
00608     fclose(output_file);
00609 
00610 #ifdef PROGRESS_REPORT
00611   end_progress_monitor((j_common_ptr) &cinfo);
00612 #endif
00613 
00614   /* All done. */
00615   exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
00616   return 0;         /* suppress no-return-value warnings */
00617 }
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