SAMV71 Xplained Ultra Software Package 1.5

cjpeg.c

00001 /*
00002  * cjpeg.c
00003  *
00004  * Copyright (C) 1991-1998, Thomas G. Lane.
00005  * Modified 2003-2008 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 compressor.
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  *  cjpeg [options]  inputfile outputfile
00015  *  cjpeg [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  *  cjpeg [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 #ifdef USE_CCOMMAND     /* command-line reader for Macintosh */
00031 #ifdef __MWERKS__
00032 #include <SIOUX.h>              /* Metrowerks needs this */
00033 #include <console.h>        /* ... and this */
00034 #endif
00035 #ifdef THINK_C
00036 #include <console.h>        /* Think declares it here */
00037 #endif
00038 #endif
00039 
00040 
00041 /* Create the add-on message string table. */
00042 
00043 #define JMESSAGE(code,string)   string ,
00044 
00045 static const char * const cdjpeg_message_table[] = {
00046 #include "cderror.h"
00047   NULL
00048 };
00049 
00050 
00051 /*
00052  * This routine determines what format the input file is,
00053  * and selects the appropriate input-reading module.
00054  *
00055  * To determine which family of input formats the file belongs to,
00056  * we may look only at the first byte of the file, since C does not
00057  * guarantee that more than one character can be pushed back with ungetc.
00058  * Looking at additional bytes would require one of these approaches:
00059  *     1) assume we can fseek() the input file (fails for piped input);
00060  *     2) assume we can push back more than one character (works in
00061  *        some C implementations, but unportable);
00062  *     3) provide our own buffering (breaks input readers that want to use
00063  *        stdio directly, such as the RLE library);
00064  * or  4) don't put back the data, and modify the input_init methods to assume
00065  *        they start reading after the start of file (also breaks RLE library).
00066  * #1 is attractive for MS-DOS but is untenable on Unix.
00067  *
00068  * The most portable solution for file types that can't be identified by their
00069  * first byte is to make the user tell us what they are.  This is also the
00070  * only approach for "raw" file types that contain only arbitrary values.
00071  * We presently apply this method for Targa files.  Most of the time Targa
00072  * files start with 0x00, so we recognize that case.  Potentially, however,
00073  * a Targa file could start with any byte value (byte 0 is the length of the
00074  * seldom-used ID field), so we provide a switch to force Targa input mode.
00075  */
00076 
00077 static boolean is_targa;    /* records user -targa switch */
00078 
00079 
00080 LOCAL(cjpeg_source_ptr)
00081 select_file_type (j_compress_ptr cinfo, FILE * infile)
00082 {
00083   int c;
00084 
00085   if (is_targa) {
00086 #ifdef TARGA_SUPPORTED
00087     return jinit_read_targa(cinfo);
00088 #else
00089     ERREXIT(cinfo, JERR_TGA_NOTCOMP);
00090 #endif
00091   }
00092 
00093   if ((c = getc(infile)) == EOF)
00094     ERREXIT(cinfo, JERR_INPUT_EMPTY);
00095   if (ungetc(c, infile) == EOF)
00096     ERREXIT(cinfo, JERR_UNGETC_FAILED);
00097 
00098   switch (c) {
00099 #ifdef BMP_SUPPORTED
00100   case 'B':
00101     return jinit_read_bmp(cinfo);
00102 #endif
00103 #ifdef GIF_SUPPORTED
00104   case 'G':
00105     return jinit_read_gif(cinfo);
00106 #endif
00107 #ifdef PPM_SUPPORTED
00108   case 'P':
00109     return jinit_read_ppm(cinfo);
00110 #endif
00111 #ifdef RLE_SUPPORTED
00112   case 'R':
00113     return jinit_read_rle(cinfo);
00114 #endif
00115 #ifdef TARGA_SUPPORTED
00116   case 0x00:
00117     return jinit_read_targa(cinfo);
00118 #endif
00119   default:
00120     ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
00121     break;
00122   }
00123 
00124   return NULL;          /* suppress compiler warnings */
00125 }
00126 
00127 
00128 /*
00129  * Argument-parsing code.
00130  * The switch parser is designed to be useful with DOS-style command line
00131  * syntax, ie, intermixed switches and file names, where only the switches
00132  * to the left of a given file name affect processing of that file.
00133  * The main program in this file doesn't actually use this capability...
00134  */
00135 
00136 
00137 static const char * progname;   /* program name for error messages */
00138 static char * outfilename;  /* for -outfile switch */
00139 
00140 
00141 LOCAL(void)
00142 usage (void)
00143 /* complain about bad command line */
00144 {
00145   fprintf(stderr, "usage: %s [switches] ", progname);
00146 #ifdef TWO_FILE_COMMANDLINE
00147   fprintf(stderr, "inputfile outputfile\n");
00148 #else
00149   fprintf(stderr, "[inputfile]\n");
00150 #endif
00151 
00152   fprintf(stderr, "Switches (names may be abbreviated):\n");
00153   fprintf(stderr, "  -quality N[,...]   Compression quality (0..100; 5-95 is useful range)\n");
00154   fprintf(stderr, "  -grayscale     Create monochrome JPEG file\n");
00155 #ifdef ENTROPY_OPT_SUPPORTED
00156   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");
00157 #endif
00158 #ifdef C_PROGRESSIVE_SUPPORTED
00159   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");
00160 #endif
00161 #ifdef DCT_SCALING_SUPPORTED
00162   fprintf(stderr, "  -scale M/N     Scale image by fraction M/N, eg, 1/2\n");
00163 #endif
00164 #ifdef TARGA_SUPPORTED
00165   fprintf(stderr, "  -targa         Input file is Targa format (usually not needed)\n");
00166 #endif
00167   fprintf(stderr, "Switches for advanced users:\n");
00168 #ifdef DCT_ISLOW_SUPPORTED
00169   fprintf(stderr, "  -dct int       Use integer DCT method%s\n",
00170       (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
00171 #endif
00172 #ifdef DCT_IFAST_SUPPORTED
00173   fprintf(stderr, "  -dct fast      Use fast integer DCT (less accurate)%s\n",
00174       (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
00175 #endif
00176 #ifdef DCT_FLOAT_SUPPORTED
00177   fprintf(stderr, "  -dct float     Use floating-point DCT method%s\n",
00178       (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
00179 #endif
00180   fprintf(stderr, "  -nosmooth      Don't use high-quality downsampling\n");
00181   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
00182 #ifdef INPUT_SMOOTHING_SUPPORTED
00183   fprintf(stderr, "  -smooth N      Smooth dithered input (N=1..100 is strength)\n");
00184 #endif
00185   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
00186   fprintf(stderr, "  -outfile name  Specify name for output file\n");
00187   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
00188   fprintf(stderr, "Switches for wizards:\n");
00189 #ifdef C_ARITH_CODING_SUPPORTED
00190   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
00191 #endif
00192   fprintf(stderr, "  -baseline      Force baseline quantization tables\n");
00193   fprintf(stderr, "  -qtables file  Use quantization tables given in file\n");
00194   fprintf(stderr, "  -qslots N[,...]    Set component quantization tables\n");
00195   fprintf(stderr, "  -sample HxV[,...]  Set component sampling factors\n");
00196 #ifdef C_MULTISCAN_FILES_SUPPORTED
00197   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
00198 #endif
00199   exit(EXIT_FAILURE);
00200 }
00201 
00202 
00203 LOCAL(int)
00204 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
00205         int last_file_arg_seen, boolean for_real)
00206 /* Parse optional switches.
00207  * Returns argv[] index of first file-name argument (== argc if none).
00208  * Any file names with indexes <= last_file_arg_seen are ignored;
00209  * they have presumably been processed in a previous iteration.
00210  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
00211  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
00212  * processing.
00213  */
00214 {
00215   int argn;
00216   char * arg;
00217   boolean force_baseline;
00218   boolean simple_progressive;
00219   char * qualityarg = NULL; /* saves -quality parm if any */
00220   char * qtablefile = NULL; /* saves -qtables filename if any */
00221   char * qslotsarg = NULL;  /* saves -qslots parm if any */
00222   char * samplearg = NULL;  /* saves -sample parm if any */
00223   char * scansarg = NULL;   /* saves -scans parm if any */
00224 
00225   /* Set up default JPEG parameters. */
00226 
00227   force_baseline = FALSE;   /* by default, allow 16-bit quantizers */
00228   simple_progressive = FALSE;
00229   is_targa = FALSE;
00230   outfilename = NULL;
00231   cinfo->err->trace_level = 0;
00232 
00233   /* Scan command line options, adjust parameters */
00234 
00235   for (argn = 1; argn < argc; argn++) {
00236     arg = argv[argn];
00237     if (*arg != '-') {
00238       /* Not a switch, must be a file name argument */
00239       if (argn <= last_file_arg_seen) {
00240     outfilename = NULL; /* -outfile applies to just one input file */
00241     continue;       /* ignore this name if previously processed */
00242       }
00243       break;            /* else done parsing switches */
00244     }
00245     arg++;          /* advance past switch marker character */
00246 
00247     if (keymatch(arg, "arithmetic", 1)) {
00248       /* Use arithmetic coding. */
00249 #ifdef C_ARITH_CODING_SUPPORTED
00250       cinfo->arith_code = TRUE;
00251 #else
00252       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
00253           progname);
00254       exit(EXIT_FAILURE);
00255 #endif
00256 
00257     } else if (keymatch(arg, "baseline", 1)) {
00258       /* Force baseline-compatible output (8-bit quantizer values). */
00259       force_baseline = TRUE;
00260 
00261     } else if (keymatch(arg, "dct", 2)) {
00262       /* Select DCT algorithm. */
00263       if (++argn >= argc)   /* advance to next argument */
00264     usage();
00265       if (keymatch(argv[argn], "int", 1)) {
00266     cinfo->dct_method = JDCT_ISLOW;
00267       } else if (keymatch(argv[argn], "fast", 2)) {
00268     cinfo->dct_method = JDCT_IFAST;
00269       } else if (keymatch(argv[argn], "float", 2)) {
00270     cinfo->dct_method = JDCT_FLOAT;
00271       } else
00272     usage();
00273 
00274     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
00275       /* Enable debug printouts. */
00276       /* On first -d, print version identification */
00277       static boolean printed_version = FALSE;
00278 
00279       if (! printed_version) {
00280     fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
00281         JVERSION, JCOPYRIGHT);
00282     printed_version = TRUE;
00283       }
00284       cinfo->err->trace_level++;
00285 
00286     } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
00287       /* Force a monochrome JPEG file to be generated. */
00288       jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
00289 
00290     } else if (keymatch(arg, "maxmemory", 3)) {
00291       /* Maximum memory in Kb (or Mb with 'm'). */
00292       long lval;
00293       char ch = 'x';
00294 
00295       if (++argn >= argc)   /* advance to next argument */
00296     usage();
00297       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
00298     usage();
00299       if (ch == 'm' || ch == 'M')
00300     lval *= 1000L;
00301       cinfo->mem->max_memory_to_use = lval * 1000L;
00302 
00303     } else if (keymatch(arg, "nosmooth", 3)) {
00304       /* Suppress fancy downsampling */
00305       cinfo->do_fancy_downsampling = FALSE;
00306 
00307     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
00308       /* Enable entropy parm optimization. */
00309 #ifdef ENTROPY_OPT_SUPPORTED
00310       cinfo->optimize_coding = TRUE;
00311 #else
00312       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
00313           progname);
00314       exit(EXIT_FAILURE);
00315 #endif
00316 
00317     } else if (keymatch(arg, "outfile", 4)) {
00318       /* Set output file name. */
00319       if (++argn >= argc)   /* advance to next argument */
00320     usage();
00321       outfilename = argv[argn]; /* save it away for later use */
00322 
00323     } else if (keymatch(arg, "progressive", 1)) {
00324       /* Select simple progressive mode. */
00325 #ifdef C_PROGRESSIVE_SUPPORTED
00326       simple_progressive = TRUE;
00327       /* We must postpone execution until num_components is known. */
00328 #else
00329       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
00330           progname);
00331       exit(EXIT_FAILURE);
00332 #endif
00333 
00334     } else if (keymatch(arg, "quality", 1)) {
00335       /* Quality ratings (quantization table scaling factors). */
00336       if (++argn >= argc)   /* advance to next argument */
00337     usage();
00338       qualityarg = argv[argn];
00339 
00340     } else if (keymatch(arg, "qslots", 2)) {
00341       /* Quantization table slot numbers. */
00342       if (++argn >= argc)   /* advance to next argument */
00343     usage();
00344       qslotsarg = argv[argn];
00345       /* Must delay setting qslots until after we have processed any
00346        * colorspace-determining switches, since jpeg_set_colorspace sets
00347        * default quant table numbers.
00348        */
00349 
00350     } else if (keymatch(arg, "qtables", 2)) {
00351       /* Quantization tables fetched from file. */
00352       if (++argn >= argc)   /* advance to next argument */
00353     usage();
00354       qtablefile = argv[argn];
00355       /* We postpone actually reading the file in case -quality comes later. */
00356 
00357     } else if (keymatch(arg, "restart", 1)) {
00358       /* Restart interval in MCU rows (or in MCUs with 'b'). */
00359       long lval;
00360       char ch = 'x';
00361 
00362       if (++argn >= argc)   /* advance to next argument */
00363     usage();
00364       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
00365     usage();
00366       if (lval < 0 || lval > 65535L)
00367     usage();
00368       if (ch == 'b' || ch == 'B') {
00369     cinfo->restart_interval = (unsigned int) lval;
00370     cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
00371       } else {
00372     cinfo->restart_in_rows = (int) lval;
00373     /* restart_interval will be computed during startup */
00374       }
00375 
00376     } else if (keymatch(arg, "sample", 2)) {
00377       /* Set sampling factors. */
00378       if (++argn >= argc)   /* advance to next argument */
00379     usage();
00380       samplearg = argv[argn];
00381       /* Must delay setting sample factors until after we have processed any
00382        * colorspace-determining switches, since jpeg_set_colorspace sets
00383        * default sampling factors.
00384        */
00385 
00386     } else if (keymatch(arg, "scale", 4)) {
00387       /* Scale the image by a fraction M/N. */
00388       if (++argn >= argc)   /* advance to next argument */
00389     usage();
00390       if (sscanf(argv[argn], "%d/%d",
00391          &cinfo->scale_num, &cinfo->scale_denom) != 2)
00392     usage();
00393 
00394     } else if (keymatch(arg, "scans", 4)) {
00395       /* Set scan script. */
00396 #ifdef C_MULTISCAN_FILES_SUPPORTED
00397       if (++argn >= argc)   /* advance to next argument */
00398     usage();
00399       scansarg = argv[argn];
00400       /* We must postpone reading the file in case -progressive appears. */
00401 #else
00402       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
00403           progname);
00404       exit(EXIT_FAILURE);
00405 #endif
00406 
00407     } else if (keymatch(arg, "smooth", 2)) {
00408       /* Set input smoothing factor. */
00409       int val;
00410 
00411       if (++argn >= argc)   /* advance to next argument */
00412     usage();
00413       if (sscanf(argv[argn], "%d", &val) != 1)
00414     usage();
00415       if (val < 0 || val > 100)
00416     usage();
00417       cinfo->smoothing_factor = val;
00418 
00419     } else if (keymatch(arg, "targa", 1)) {
00420       /* Input file is Targa format. */
00421       is_targa = TRUE;
00422 
00423     } else {
00424       usage();          /* bogus switch */
00425     }
00426   }
00427 
00428   /* Post-switch-scanning cleanup */
00429 
00430   if (for_real) {
00431 
00432     /* Set quantization tables for selected quality. */
00433     /* Some or all may be overridden if -qtables is present. */
00434     if (qualityarg != NULL) /* process -quality if it was present */
00435       if (! set_quality_ratings(cinfo, qualityarg, force_baseline))
00436     usage();
00437 
00438     if (qtablefile != NULL) /* process -qtables if it was present */
00439       if (! read_quant_tables(cinfo, qtablefile, force_baseline))
00440     usage();
00441 
00442     if (qslotsarg != NULL)  /* process -qslots if it was present */
00443       if (! set_quant_slots(cinfo, qslotsarg))
00444     usage();
00445 
00446     if (samplearg != NULL)  /* process -sample if it was present */
00447       if (! set_sample_factors(cinfo, samplearg))
00448     usage();
00449 
00450 #ifdef C_PROGRESSIVE_SUPPORTED
00451     if (simple_progressive) /* process -progressive; -scans can override */
00452       jpeg_simple_progression(cinfo);
00453 #endif
00454 
00455 #ifdef C_MULTISCAN_FILES_SUPPORTED
00456     if (scansarg != NULL)   /* process -scans if it was present */
00457       if (! read_scan_script(cinfo, scansarg))
00458     usage();
00459 #endif
00460   }
00461 
00462   return argn;          /* return index of next arg (file name) */
00463 }
00464 
00465 
00466 /*
00467  * The main program.
00468  */
00469 
00470 int
00471 main (int argc, char **argv)
00472 {
00473   struct jpeg_compress_struct cinfo;
00474   struct jpeg_error_mgr jerr;
00475 #ifdef PROGRESS_REPORT
00476   struct cdjpeg_progress_mgr progress;
00477 #endif
00478   int file_index;
00479   cjpeg_source_ptr src_mgr;
00480   FILE * input_file;
00481   FILE * output_file;
00482   JDIMENSION num_scanlines;
00483 
00484   /* On Mac, fetch a command line. */
00485 #ifdef USE_CCOMMAND
00486   argc = ccommand(&argv);
00487 #endif
00488 
00489   progname = argv[0];
00490   if (progname == NULL || progname[0] == 0)
00491     progname = "cjpeg";     /* in case C library doesn't provide it */
00492 
00493   /* Initialize the JPEG compression object with default error handling. */
00494   cinfo.err = jpeg_std_error(&jerr);
00495   jpeg_create_compress(&cinfo);
00496   /* Add some application-specific error messages (from cderror.h) */
00497   jerr.addon_message_table = cdjpeg_message_table;
00498   jerr.first_addon_message = JMSG_FIRSTADDONCODE;
00499   jerr.last_addon_message = JMSG_LASTADDONCODE;
00500 
00501   /* Now safe to enable signal catcher. */
00502 #ifdef NEED_SIGNAL_CATCHER
00503   enable_signal_catcher((j_common_ptr) &cinfo);
00504 #endif
00505 
00506   /* Initialize JPEG parameters.
00507    * Much of this may be overridden later.
00508    * In particular, we don't yet know the input file's color space,
00509    * but we need to provide some value for jpeg_set_defaults() to work.
00510    */
00511 
00512   cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
00513   jpeg_set_defaults(&cinfo);
00514 
00515   /* Scan command line to find file names.
00516    * It is convenient to use just one switch-parsing routine, but the switch
00517    * values read here are ignored; we will rescan the switches after opening
00518    * the input file.
00519    */
00520 
00521   file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
00522 
00523 #ifdef TWO_FILE_COMMANDLINE
00524   /* Must have either -outfile switch or explicit output file name */
00525   if (outfilename == NULL) {
00526     if (file_index != argc-2) {
00527       fprintf(stderr, "%s: must name one input and one output file\n",
00528           progname);
00529       usage();
00530     }
00531     outfilename = argv[file_index+1];
00532   } else {
00533     if (file_index != argc-1) {
00534       fprintf(stderr, "%s: must name one input and one output file\n",
00535           progname);
00536       usage();
00537     }
00538   }
00539 #else
00540   /* Unix style: expect zero or one file name */
00541   if (file_index < argc-1) {
00542     fprintf(stderr, "%s: only one input file\n", progname);
00543     usage();
00544   }
00545 #endif /* TWO_FILE_COMMANDLINE */
00546 
00547   /* Open the input file. */
00548   if (file_index < argc) {
00549     if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
00550       fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
00551       exit(EXIT_FAILURE);
00552     }
00553   } else {
00554     /* default input file is stdin */
00555     input_file = read_stdin();
00556   }
00557 
00558   /* Open the output file. */
00559   if (outfilename != NULL) {
00560     if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
00561       fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
00562       exit(EXIT_FAILURE);
00563     }
00564   } else {
00565     /* default output file is stdout */
00566     output_file = write_stdout();
00567   }
00568 
00569 #ifdef PROGRESS_REPORT
00570   start_progress_monitor((j_common_ptr) &cinfo, &progress);
00571 #endif
00572 
00573   /* Figure out the input file format, and set up to read it. */
00574   src_mgr = select_file_type(&cinfo, input_file);
00575   src_mgr->input_file = input_file;
00576 
00577   /* Read the input file header to obtain file size & colorspace. */
00578   (*src_mgr->start_input) (&cinfo, src_mgr);
00579 
00580   /* Now that we know input colorspace, fix colorspace-dependent defaults */
00581   jpeg_default_colorspace(&cinfo);
00582 
00583   /* Adjust default compression parameters by re-parsing the options */
00584   file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
00585 
00586   /* Specify data destination for compression */
00587   jpeg_stdio_dest(&cinfo, output_file);
00588 
00589   /* Start compressor */
00590   jpeg_start_compress(&cinfo, TRUE);
00591 
00592   /* Process data */
00593   while (cinfo.next_scanline < cinfo.image_height) {
00594     num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
00595     (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
00596   }
00597 
00598   /* Finish compression and release memory */
00599   (*src_mgr->finish_input) (&cinfo, src_mgr);
00600   jpeg_finish_compress(&cinfo);
00601   jpeg_destroy_compress(&cinfo);
00602 
00603   /* Close files, if we opened them */
00604   if (input_file != stdin)
00605     fclose(input_file);
00606   if (output_file != stdout)
00607     fclose(output_file);
00608 
00609 #ifdef PROGRESS_REPORT
00610   end_progress_monitor((j_common_ptr) &cinfo);
00611 #endif
00612 
00613   /* All done. */
00614   exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
00615   return 0;         /* suppress no-return-value warnings */
00616 }
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