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- /*
- * jcmain.c
- *
- * Copyright (C) 1991, 1992, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a command-line user interface for the JPEG compressor.
- * It should work on any system with Unix- or MS-DOS-style command lines.
- *
- * Two different command line styles are permitted, depending on the
- * compile-time switch TWO_FILE_COMMANDLINE:
- * cjpeg [options] inputfile outputfile
- * cjpeg [options] [inputfile]
- * In the second style, output is always to standard output, which you'd
- * normally redirect to a file or pipe to some other program. Input is
- * either from a named file or from standard input (typically redirected).
- * The second style is convenient on Unix but is unhelpful on systems that
- * don't support pipes. Also, you MUST use the first style if your system
- * doesn't do binary I/O to stdin/stdout.
- %
- % Modified: Jin Guojun - LBL, Image Technology Group
- % Date: April 14, 1992
- % Goal: To be easily handled by conversion library - CCS (c)
- % HIPS, FITS, GIF, RLE, SUN-raster, PNM, TIFF, PICT ...
- % can be compressed by cjpeg now, directly displayed by tuner,
- % decompressed to other image type by torle, torast, and color_ps.
- % These type of images can be determined by program `headers'.
- */
-
- #include "jinclude.h"
- #ifdef INCLUDES_ARE_ANSI
- #include <stdlib.h> /* to declare exit() */
- #endif
- #include <ctype.h> /* to declare isupper(), tolower() */
- #ifdef NEED_SIGNAL_CATCHER
- #include <signal.h> /* to declare signal() */
- #endif
- #ifdef USE_SETMODE
- #include <fcntl.h> /* to declare setmode() */
- #endif
-
- #ifdef THINK_C
- #include <console.h> /* command-line reader for Macintosh */
- #endif
-
- #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
- #define READ_BINARY "r"
- #define WRITE_BINARY "w"
- #else
- #define READ_BINARY "rb"
- #define WRITE_BINARY "wb"
- #endif
-
- #ifndef EXIT_FAILURE /* define exit() codes if not provided */
- #define EXIT_FAILURE 1
- #endif
- #ifndef EXIT_SUCCESS
- #ifdef VMS
- #define EXIT_SUCCESS 1 /* VMS is very nonstandard */
- #else
- #define EXIT_SUCCESS 0
- #endif
- #endif
-
-
- #include "jversion.h" /* for version message */
-
-
- /*
- * This routine determines what format the input file is,
- * and selects the appropriate input-reading module.
- *
- * To determine which family of input formats the file belongs to,
- * we may look only at the first byte of the file, since C does not
- * guarantee that more than one character can be pushed back with ungetc.
- * Looking at additional bytes would require one of these approaches:
- * 1) assume we can fseek() the input file (fails for piped input);
- * 2) assume we can push back more than one character (works in
- * some C implementations, but unportable);
- * 3) provide our own buffering as is done in djpeg (breaks input readers
- * that want to use stdio directly, such as the RLE library);
- * or 4) don't put back the data, and modify the input_init methods to assume
- * they start reading after the start of file (also breaks RLE library).
- * #1 is attractive for MS-DOS but is untenable on Unix.
- *
- * The most portable solution for file types that can't be identified by their
- * first byte is to make the user tell us what they are. This is also the
- * only approach for "raw" file types that contain only arbitrary values.
- * We presently apply this method for Targa files. Most of the time Targa
- * files start with 0x00, so we recognize that case. Potentially, however,
- * a Targa file could start with any byte value (byte 0 is the length of the
- * seldom-used ID field), so we provide a switch to force Targa input mode.
- */
-
- static boolean is_targa; /* records user -targa switch */
-
- LOCAL int input_row_pos;
- U_IMAGE uimg;
-
- void
- input_init(compress_info_ptr cinfo)
- {
- register U_IMAGE* img = cinfo->img;
- (*img->header_handle)(HEADER_READ, img, 0, 0, 0);
- cinfo->image_width = img->width;
- cinfo->image_height = img->height;
- cinfo->data_precision = 8;
- switch(img->color_form) {
- case CFM_SGF:
- cinfo->in_color_space = CS_GRAYSCALE;
- cinfo->input_components = img->dpy_channels;
- break;
- case CFM_ILL:
- default:
- cinfo->in_color_space = CS_RGB;
- cinfo->input_components = 3;
- }
- }
-
- void
- get_input_row(compress_info_ptr cinfo, JSAMPARRAY pixel_row)
- {
- register U_IMAGE* img = cinfo->img;
- register int col = img->width;
- register JSAMPROW pr = pixel_row[0], pg = pixel_row[1], pb = pixel_row[2];
- register byte *p = (byte*) img->src + input_row_pos * img->dpy_channels * col;
- switch(img->color_form) {
- case CFM_SCF:
- while (col--) {
- register int c = *p++;
- *pr++ = reg_cmap[0][c];
- *pg++ = reg_cmap[1][c];
- *pb++ = reg_cmap[2][c];
- }
- break;
- case CFM_SEPLANE:
- mesg("warning -- not ready\n");
- case CFM_ILC:
- snf_to_rle(pr, p, col, 3, NULL); /* ? */
- break;
- case CFM_ILL:
- memcpy(pb, p+(col<<1), col);
- memcpy(pg, p+col, col);
- case CFM_SGF:
- memcpy(pr, p, col);
- break;
- default: prgmerr('f', "strange color form %d", img->color_form);
- }
- input_row_pos++;
- }
-
- LOCAL void
- input_term(compress_info_ptr cinfo, int term)
- {
- if (term) free(cinfo->img->src);
- else input_row_pos = 0;
- }
-
-
- LOCAL void
- select_file_type (compress_info_ptr cinfo)
- {
- if (is_targa) {
- #ifdef TARGA_SUPPORTED
- jselrtarga(cinfo);
- #else
- ERREXIT(cinfo->emethods, "Targa support was not compiled");
- #endif
- } else {
- cinfo->methods->input_init = input_init;
- cinfo->methods->get_input_row = get_input_row;
- cinfo->methods->input_term = input_term;
- }
- }
-
-
- /*
- * This routine gets control after the input file header has been read.
- * It must determine what output JPEG file format is to be written,
- * and make any other compression parameter changes that are desirable.
- */
-
- METHODDEF void
- c_ui_method_selection (compress_info_ptr cinfo)
- {
- /* If the input is gray scale, generate a monochrome JPEG file. */
- if (cinfo->in_color_space == CS_GRAYSCALE)
- j_monochrome_default(cinfo);
- /* For now, always select JFIF output format. */
- #ifdef JFIF_SUPPORTED
- jselwjfif(cinfo);
- #else
- You shoulda defined JFIF_SUPPORTED. /* deliberate syntax error */
- #endif
- }
-
-
- /*
- * Signal catcher to ensure that temporary files are removed before aborting.
- * NB: for Amiga Manx C this is actually a global routine named _abort();
- * see -Dsignal_catcher=_abort in CFLAGS. Talk about bogus...
- */
-
- #ifdef NEED_SIGNAL_CATCHER
-
- static external_methods_ptr emethods; /* for access to free_all */
-
- GLOBAL void
- signal_catcher (int signum)
- {
- if (emethods != NULL) {
- emethods->trace_level = 0; /* turn off trace output */
- (*emethods->free_all) (); /* clean up memory allocation & temp files */
- }
- exit(EXIT_FAILURE);
- }
-
- #endif
-
-
- /*
- * Optional routine to display a percent-done figure on stderr.
- * See jcdeflts.c for explanation of the information used.
- */
-
- #ifdef PROGRESS_REPORT
-
- METHODDEF void
- progress_monitor (compress_info_ptr cinfo, long loopcounter, long looplimit)
- {
- if (cinfo->total_passes > 1) {
- fprintf(stderr, "\rPass %d/%d: %3d%% ",
- cinfo->completed_passes+1, cinfo->total_passes,
- (int) (loopcounter*100L/looplimit));
- } else {
- fprintf(stderr, "\r %3d%% ",
- (int) (loopcounter*100L/looplimit));
- }
- fflush(stderr);
- }
-
- #endif
-
-
- /*
- * Argument-parsing code.
- * The switch parser is designed to be useful with DOS-style command line
- * syntax, ie, intermixed switches and file names, where only the switches
- * to the left of a given file name affect processing of that file.
- * The main program in this file doesn't actually use this capability...
- */
-
-
- static char * progname; /* program name for error messages */
-
-
- LOCAL void
- usage (void)
- /* complain about bad command line */
- {
- fprintf(stderr, "usage: %s [switches] ", progname);
- #ifdef TWO_FILE_COMMANDLINE
- fprintf(stderr, "inputfile outputfile\n");
- #else
- fprintf(stderr, "[inputfile]\n");
- #endif
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -quality N Compression quality (0..100; 5-95 is useful range)\n");
- fprintf(stderr, " -grayscale Create monochrome JPEG file\n");
- #ifdef ENTROPY_OPT_SUPPORTED
- fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
- #endif
- #ifdef TARGA_SUPPORTED
- fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n");
- #endif
- fprintf(stderr, "Switches for advanced users:\n");
- fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
- fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n");
- fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
- fprintf(stderr, " -verbose or -debug Emit debug output\n");
- fprintf(stderr, "Switches for wizards:\n");
- #ifdef C_ARITH_CODING_SUPPORTED
- fprintf(stderr, " -arithmetic Use arithmetic coding\n");
- #endif
- #ifdef C_MULTISCAN_FILES_SUPPORTED
- fprintf(stderr, " -nointerleave Create noninterleaved JPEG file\n");
- #endif
- fprintf(stderr, " -qtables file Use quantization tables given in file\n");
- fprintf(stderr, " -sample HxV[,...] Set JPEG sampling factors\n");
- exit(EXIT_FAILURE);
- }
-
-
- LOCAL boolean
- keymatch (char * arg, const char * keyword, int minchars)
- /* Case-insensitive matching of (possibly abbreviated) keyword switches. */
- /* keyword is the constant keyword (must be lower case already), */
- /* minchars is length of minimum legal abbreviation. */
- {
- register int ca, ck;
- register int nmatched = 0;
-
- while ((ca = *arg++) != '\0') {
- if ((ck = *keyword++) == '\0')
- return FALSE; /* arg longer than keyword, no good */
- if (isupper(ca)) /* force arg to lcase (assume ck is already) */
- ca = tolower(ca);
- if (ca != ck)
- return FALSE; /* no good */
- nmatched++; /* count matched characters */
- }
- /* reached end of argument; fail if it's too short for unique abbrev */
- if (nmatched < minchars)
- return FALSE;
- return TRUE; /* A-OK */
- }
-
-
- LOCAL int
- qt_getc (FILE * file)
- /* Read next char, skipping over any comments (# to end of line) */
- /* A comment/newline sequence is returned as a newline */
- {
- register int ch;
-
- ch = getc(file);
- if (ch == '#') {
- do {
- ch = getc(file);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
- }
-
-
- LOCAL long
- read_qt_integer (FILE * file)
- /* Read an unsigned decimal integer from a quantization-table file */
- /* Swallows one trailing character after the integer */
- {
- register int ch;
- register long val;
-
- /* Skip any leading whitespace, detect EOF */
- do {
- ch = qt_getc(file);
- if (ch == EOF)
- return EOF;
- } while (isspace(ch));
-
- if (! isdigit(ch)) {
- fprintf(stderr, "%s: bogus data in quantization file\n", progname);
- exit(EXIT_FAILURE);
- }
-
- val = ch - '0';
- while (ch = qt_getc(file), isdigit(ch)) {
- val *= 10;
- val += ch - '0';
- }
- return val;
- }
-
-
- LOCAL void
- read_quant_tables (compress_info_ptr cinfo, char * filename, int scale_factor)
- /* Read a set of quantization tables from the specified file.
- * The file is plain ASCII text: decimal numbers with whitespace between.
- * Comments preceded by '#' may be included in the file.
- * There may be one to NUM_QUANT_TBLS tables in the file, each of 64 values.
- * The tables are implicitly numbered 0,1,etc.
- */
- {
- /* ZIG[i] is the zigzag-order position of the i'th element of a DCT block */
- /* read in natural order (left to right, top to bottom). */
- static const short ZIG[DCTSIZE2] = {
- 0, 1, 5, 6, 14, 15, 27, 28,
- 2, 4, 7, 13, 16, 26, 29, 42,
- 3, 8, 12, 17, 25, 30, 41, 43,
- 9, 11, 18, 24, 31, 40, 44, 53,
- 10, 19, 23, 32, 39, 45, 52, 54,
- 20, 22, 33, 38, 46, 51, 55, 60,
- 21, 34, 37, 47, 50, 56, 59, 61,
- 35, 36, 48, 49, 57, 58, 62, 63
- };
- FILE * fp;
- int tblno, i;
- long val;
- QUANT_TBL table;
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, filename);
- exit(EXIT_FAILURE);
- }
- tblno = 0;
-
- while ((val = read_qt_integer(fp)) != EOF) { /* read 1st element of table */
- if (tblno >= NUM_QUANT_TBLS) {
- fprintf(stderr, "%s: too many tables in file %s\n", progname, filename);
- exit(EXIT_FAILURE);
- }
- table[0] = (QUANT_VAL) val;
- for (i = 1; i < DCTSIZE2; i++) {
- if ((val = read_qt_integer(fp)) == EOF) {
- fprintf(stderr, "%s: incomplete table in file %s\n", progname, filename);
- exit(EXIT_FAILURE);
- }
- table[ZIG[i]] = (QUANT_VAL) val;
- }
- j_add_quant_table(cinfo, tblno, table, scale_factor, FALSE);
- tblno++;
- }
-
- fclose(fp);
- }
-
-
- LOCAL void
- set_sample_factors (compress_info_ptr cinfo, char *arg)
- /* Process a sample-factors parameter string, of the form */
- /* HxV[,HxV,...] */
- {
- #define MAX_COMPONENTS 4 /* # of comp_info slots made by jcdeflts.c */
- int ci, val1, val2;
- char ch1, ch2;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch2 = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c%d%c", &val1, &ch1, &val2, &ch2) < 3)
- usage();
- if ((ch1 != 'x' && ch1 != 'X') || ch2 != ',')
- usage(); /* syntax check */
- if (val1 <= 0 || val1 > 4 || val2 <= 0 || val2 > 4) {
- fprintf(stderr, "JPEG sampling factors must be 1..4\n");
- exit(EXIT_FAILURE);
- }
- cinfo->comp_info[ci].h_samp_factor = val1;
- cinfo->comp_info[ci].v_samp_factor = val2;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to 1x1 sampling */
- cinfo->comp_info[ci].h_samp_factor = 1;
- cinfo->comp_info[ci].v_samp_factor = 1;
- }
- }
- }
-
-
- LOCAL int
- parse_switches (compress_info_ptr cinfo, int last_file_arg_seen,
- int argc, char **argv)
- /* Initialize cinfo with default switch settings, then parse option switches.
- * Returns argv[] index of first file-name argument (== argc if none).
- * Any file names with indexes <= last_file_arg_seen are ignored;
- * they have presumably been processed in a previous iteration.
- * (Pass 0 for last_file_arg_seen on the first or only iteration.)
- */
- {
- int argn;
- char * arg;
- char * qtablefile = NULL; /* saves -qtables filename if any */
- int q_scale_factor = 100; /* default to no scaling for -qtables */
-
- /* (Re-)initialize the system-dependent error and memory managers. */
- jselerror(cinfo->emethods); /* error/trace message routines */
- jselmemmgr(cinfo->emethods); /* memory allocation routines */
- cinfo->methods->c_ui_method_selection = c_ui_method_selection;
-
- /* Now OK to enable signal catcher. */
- #ifdef NEED_SIGNAL_CATCHER
- emethods = cinfo->emethods;
- #endif
-
- /* Set up default JPEG parameters. */
- /* Note that default -quality level here need not, and does not,
- * match the default scaling for an explicit -qtables argument.
- */
- j_c_defaults(cinfo, 75, FALSE); /* default quality level = 75 */
- is_targa = FALSE;
-
- /* Scan command line options, adjust parameters */
-
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (*arg != '-') {
- /* Not a switch, must be a file name argument */
- if (argn <= last_file_arg_seen)
- continue; /* ignore it if previously processed */
- break; /* else done parsing switches */
- }
- arg++; /* advance past switch marker character */
-
- if (keymatch(arg, "arithmetic", 1)) {
- /* Use arithmetic coding. */
- #ifdef C_ARITH_CODING_SUPPORTED
- cinfo->arith_code = TRUE;
- #else
- fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
- progname);
- exit(EXIT_FAILURE);
- #endif
-
- } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
- /* Enable debug printouts. */
- /* On first -d, print version identification */
- if (last_file_arg_seen == 0 && cinfo->emethods->trace_level == 0)
- fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
- JVERSION, JCOPYRIGHT);
- cinfo->emethods->trace_level++;
-
- } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
- /* Force a monochrome JPEG file to be generated. */
- j_monochrome_default(cinfo);
-
- } else if (keymatch(arg, "maxmemory", 1)) {
- /* Maximum memory in Kb (or Mb with 'm'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (ch == 'm' || ch == 'M')
- lval *= 1000L;
- cinfo->emethods->max_memory_to_use = lval * 1000L;
-
- } else if (keymatch(arg, "nointerleave", 3)) {
- /* Create noninterleaved file. */
- #ifdef C_MULTISCAN_FILES_SUPPORTED
- cinfo->interleave = FALSE;
- #else
- fprintf(stderr, "%s: sorry, multiple-scan support was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
- #endif
-
- } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
- /* Enable entropy parm optimization. */
- #ifdef ENTROPY_OPT_SUPPORTED
- cinfo->optimize_coding = TRUE;
- #else
- fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
- #endif
-
- } else if (keymatch(arg, "quality", 1)) {
- /* Quality factor (quantization table scaling factor). */
- int val;
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d", &val) != 1)
- usage();
- /* Set quantization tables (will be overridden if -qtables also given).
- * Note: we make force_baseline FALSE.
- * This means non-baseline JPEG files can be created with low Q values.
- * To ensure only baseline files are generated, pass TRUE instead.
- */
- j_set_quality(cinfo, val, FALSE);
- /* Change scale factor in case -qtables is present. */
- q_scale_factor = j_quality_scaling(val);
-
- } else if (keymatch(arg, "qtables", 2)) {
- /* Quantization tables fetched from file. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- qtablefile = argv[argn];
- /* we postpone actually reading the file in case -quality comes later */
-
- } else if (keymatch(arg, "restart", 1)) {
- /* Restart interval in MCU rows (or in MCUs with 'b'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (lval < 0 || lval > 65535L)
- usage();
- if (ch == 'b' || ch == 'B')
- cinfo->restart_interval = (UINT16) lval;
- else
- cinfo->restart_in_rows = (int) lval;
-
- } else if (keymatch(arg, "sample", 2)) {
- /* Set sampling factors. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- set_sample_factors(cinfo, argv[argn]);
-
- } else if (keymatch(arg, "smooth", 2)) {
- /* Set input smoothing factor. */
- int val;
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d", &val) != 1)
- usage();
- if (val < 0 || val > 100)
- usage();
- cinfo->smoothing_factor = val;
-
- } else if (keymatch(arg, "targa", 1)) {
- /* Input file is Targa format. */
- is_targa = TRUE;
-
- } else {
- usage(); /* bogus switch */
- }
- }
-
- /* Post-switch-scanning cleanup */
-
- if (qtablefile != NULL) /* process -qtables if it was present */
- read_quant_tables(cinfo, qtablefile, q_scale_factor);
-
- return argn; /* return index of next arg (file name) */
- }
-
-
- /*
- * The main program.
- */
-
- GLOBAL int
- main (int argc, char **argv)
- {
- struct Compress_info_struct cinfo;
- struct Compress_methods_struct c_methods;
- struct External_methods_struct e_methods;
- int file_index;
-
- /* On Mac, fetch a command line. */
- #ifdef THINK_C
- argc = ccommand(&argv);
- #endif
-
- progname = argv[0];
-
- format_init(&uimg, IMAGE_INIT_TYPE, RLE, JPEG, progname, "M5-2");
- uimg.color_dpy = True;
- cinfo.img = &uimg;
-
- /* Set up links to method structures. */
- cinfo.methods = &c_methods;
- cinfo.emethods = &e_methods;
-
- /* Install, but don't yet enable signal catcher. */
- #ifdef NEED_SIGNAL_CATCHER
- emethods = NULL;
- signal(SIGINT, signal_catcher);
- #ifdef SIGTERM /* not all systems have SIGTERM */
- signal(SIGTERM, signal_catcher);
- #endif
- #endif
-
- /* Scan command line: set up compression parameters, input & output files. */
-
- file_index = parse_switches(&cinfo, 0, argc, argv);
-
- #ifdef TWO_FILE_COMMANDLINE
-
- if (file_index != argc-2) {
- fprintf(stderr, "%s: must name one input and one output file\n", progname);
- usage();
- }
- if ((cinfo.input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- if ((cinfo.output_file = fopen(argv[file_index+1], WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index+1]);
- exit(EXIT_FAILURE);
- }
-
- #else /* not TWO_FILE_COMMANDLINE -- use Unix style */
-
- cinfo.input_file = stdin; /* default input file */
- cinfo.output_file = stdout; /* always the output file */
-
- #ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdin), O_BINARY);
- setmode(fileno(stdout), O_BINARY);
- #endif
-
- if (file_index < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
- if (file_index < argc) {
- if ((cinfo.input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- uimg.IN_FP = cinfo.input_file;
- }
-
- #endif /* TWO_FILE_COMMANDLINE */
-
- io_test(fileno(in_fp), usage(progname));
-
- /* Figure out the input file format, and set up to read it. */
- select_file_type(&cinfo);
-
- #ifdef PROGRESS_REPORT
- /* Start up progress display, unless trace output is on */
- if (e_methods.trace_level == 0)
- c_methods.progress_monitor = progress_monitor;
- #endif
-
- /* Do it to it! */
- jpeg_compress(&cinfo);
-
- #ifdef PROGRESS_REPORT
- /* Clear away progress display */
- if (e_methods.trace_level == 0) {
- fprintf(stderr, "\r \r");
- fflush(stderr);
- }
- #endif
-
- /* All done. */
- exit(EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
- }
-